annotate lib/regex.c @ 475:7e3e0dd559c7

(isnumber): Rename to is_number. (parse_user_spec): Rename uses, too.
author Jim Meyering <jim@meyering.net>
date Sat, 05 Aug 1995 03:13:16 +0000 (1995-08-05)
parents 5e68a303679e
children 9fa9a76cc2e7
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1 /* Extended regular expression matching and search library,
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2 version 0.12.
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3 (Implements POSIX draft P10003.2/D11.2, except for
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4 internationalization features.)
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5
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6 Copyright (C) 1993, 1994, 1995 Free Software Foundation, Inc.
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7
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8 This program is free software; you can redistribute it and/or modify
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9 it under the terms of the GNU General Public License as published by
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10 the Free Software Foundation; either version 2, or (at your option)
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11 any later version.
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12
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13 This program is distributed in the hope that it will be useful,
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14 but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 GNU General Public License for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with this program; if not, write to the Free Software
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20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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21
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22 /* AIX requires this to be the first thing in the file. */
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23 #if defined (_AIX) && !defined (REGEX_MALLOC)
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24 #pragma alloca
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25 #endif
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26
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27 #define _GNU_SOURCE
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28
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29 #ifdef HAVE_CONFIG_H
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30 #include <config.h>
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31 #endif
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32
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33 /* We need this for `regex.h', and perhaps for the Emacs include files. */
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34 #include <sys/types.h>
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35
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36 /* This is for other GNU distributions with internationalized messages. */
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37 #if HAVE_LIBINTL_H || defined (_LIBC)
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38 # include <libintl.h>
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39 #else
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40 # define gettext(msgid) (msgid)
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41 #endif
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42
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43 /* The `emacs' switch turns on certain matching commands
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44 that make sense only in Emacs. */
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45 #ifdef emacs
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46
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47 #include "lisp.h"
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48 #include "buffer.h"
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49 #include "syntax.h"
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50
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51 #else /* not emacs */
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52
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53 /* If we are not linking with Emacs proper,
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54 we can't use the relocating allocator
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55 even if config.h says that we can. */
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56 #undef REL_ALLOC
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57
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58 #if defined (STDC_HEADERS) || defined (_LIBC)
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59 #include <stdlib.h>
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60 #else
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61 char *malloc ();
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62 char *realloc ();
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63 #endif
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64
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65 /* When used in Emacs's lib-src, we need to get bzero and bcopy somehow.
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66 If nothing else has been done, use the method below. */
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67 #ifdef INHIBIT_STRING_HEADER
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68 #if !(defined (HAVE_BZERO) && defined (HAVE_BCOPY))
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69 #if !defined (bzero) && !defined (bcopy)
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70 #undef INHIBIT_STRING_HEADER
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71 #endif
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72 #endif
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73 #endif
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74
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75 /* This is the normal way of making sure we have a bcopy and a bzero.
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76 This is used in most programs--a few other programs avoid this
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77 by defining INHIBIT_STRING_HEADER. */
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78 #ifndef INHIBIT_STRING_HEADER
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79 #if defined (HAVE_STRING_H) || defined (STDC_HEADERS) || defined (_LIBC)
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80 #include <string.h>
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81 #ifndef bcmp
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82 #define bcmp(s1, s2, n) memcmp ((s1), (s2), (n))
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83 #endif
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84 #ifndef bcopy
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85 #define bcopy(s, d, n) memcpy ((d), (s), (n))
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86 #endif
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87 #ifndef bzero
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88 #define bzero(s, n) memset ((s), 0, (n))
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89 #endif
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90 #else
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91 #include <strings.h>
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92 #endif
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93 #endif
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94
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95 /* Define the syntax stuff for \<, \>, etc. */
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96
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97 /* This must be nonzero for the wordchar and notwordchar pattern
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98 commands in re_match_2. */
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99 #ifndef Sword
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100 #define Sword 1
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101 #endif
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102
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103 #ifdef SWITCH_ENUM_BUG
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104 #define SWITCH_ENUM_CAST(x) ((int)(x))
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105 #else
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106 #define SWITCH_ENUM_CAST(x) (x)
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107 #endif
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108
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109 #ifdef SYNTAX_TABLE
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110
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111 extern char *re_syntax_table;
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112
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113 #else /* not SYNTAX_TABLE */
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114
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115 /* How many characters in the character set. */
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116 #define CHAR_SET_SIZE 256
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117
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118 static char re_syntax_table[CHAR_SET_SIZE];
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119
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120 static void
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121 init_syntax_once ()
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122 {
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123 register int c;
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124 static int done = 0;
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125
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126 if (done)
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127 return;
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128
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129 bzero (re_syntax_table, sizeof re_syntax_table);
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130
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131 for (c = 'a'; c <= 'z'; c++)
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132 re_syntax_table[c] = Sword;
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133
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134 for (c = 'A'; c <= 'Z'; c++)
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135 re_syntax_table[c] = Sword;
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136
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137 for (c = '0'; c <= '9'; c++)
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138 re_syntax_table[c] = Sword;
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139
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140 re_syntax_table['_'] = Sword;
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141
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142 done = 1;
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143 }
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144
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145 #endif /* not SYNTAX_TABLE */
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146
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147 #define SYNTAX(c) re_syntax_table[c]
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148
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149 #endif /* not emacs */
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150
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151 /* Get the interface, including the syntax bits. */
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152 #include "regex.h"
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153
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154 /* isalpha etc. are used for the character classes. */
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155 #include <ctype.h>
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156
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157 /* Jim Meyering writes:
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158
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159 "... Some ctype macros are valid only for character codes that
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160 isascii says are ASCII (SGI's IRIX-4.0.5 is one such system --when
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161 using /bin/cc or gcc but without giving an ansi option). So, all
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162 ctype uses should be through macros like ISPRINT... If
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163 STDC_HEADERS is defined, then autoconf has verified that the ctype
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164 macros don't need to be guarded with references to isascii. ...
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165 Defining isascii to 1 should let any compiler worth its salt
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166 eliminate the && through constant folding." */
175
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167
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168 #if defined (STDC_HEADERS) || (!defined (isascii) && !defined (HAVE_ISASCII))
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169 #define ISASCII(c) 1
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170 #else
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171 #define ISASCII(c) isascii(c)
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172 #endif
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173
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174 #ifdef isblank
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175 #define ISBLANK(c) (ISASCII (c) && isblank (c))
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176 #else
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177 #define ISBLANK(c) ((c) == ' ' || (c) == '\t')
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178 #endif
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179 #ifdef isgraph
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180 #define ISGRAPH(c) (ISASCII (c) && isgraph (c))
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181 #else
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182 #define ISGRAPH(c) (ISASCII (c) && isprint (c) && !isspace (c))
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183 #endif
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184
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185 #define ISPRINT(c) (ISASCII (c) && isprint (c))
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186 #define ISDIGIT(c) (ISASCII (c) && isdigit (c))
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187 #define ISALNUM(c) (ISASCII (c) && isalnum (c))
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188 #define ISALPHA(c) (ISASCII (c) && isalpha (c))
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189 #define ISCNTRL(c) (ISASCII (c) && iscntrl (c))
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190 #define ISLOWER(c) (ISASCII (c) && islower (c))
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191 #define ISPUNCT(c) (ISASCII (c) && ispunct (c))
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192 #define ISSPACE(c) (ISASCII (c) && isspace (c))
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193 #define ISUPPER(c) (ISASCII (c) && isupper (c))
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194 #define ISXDIGIT(c) (ISASCII (c) && isxdigit (c))
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195
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196 #ifndef NULL
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197 #define NULL (void *)0
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198 #endif
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199
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200 /* We remove any previous definition of `SIGN_EXTEND_CHAR',
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201 since ours (we hope) works properly with all combinations of
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202 machines, compilers, `char' and `unsigned char' argument types.
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203 (Per Bothner suggested the basic approach.) */
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204 #undef SIGN_EXTEND_CHAR
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205 #if __STDC__
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206 #define SIGN_EXTEND_CHAR(c) ((signed char) (c))
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207 #else /* not __STDC__ */
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208 /* As in Harbison and Steele. */
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209 #define SIGN_EXTEND_CHAR(c) ((((unsigned char) (c)) ^ 128) - 128)
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210 #endif
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211
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212 /* Should we use malloc or alloca? If REGEX_MALLOC is not defined, we
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213 use `alloca' instead of `malloc'. This is because using malloc in
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214 re_search* or re_match* could cause memory leaks when C-g is used in
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215 Emacs; also, malloc is slower and causes storage fragmentation. On
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216 the other hand, malloc is more portable, and easier to debug.
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217
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218 Because we sometimes use alloca, some routines have to be macros,
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219 not functions -- `alloca'-allocated space disappears at the end of the
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220 function it is called in. */
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221
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222 #ifdef REGEX_MALLOC
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223
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224 #define REGEX_ALLOCATE malloc
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225 #define REGEX_REALLOCATE(source, osize, nsize) realloc (source, nsize)
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226 #define REGEX_FREE free
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227
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228 #else /* not REGEX_MALLOC */
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229
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230 /* Emacs already defines alloca, sometimes. */
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231 #ifndef alloca
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232
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233 /* Make alloca work the best possible way. */
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234 #ifdef __GNUC__
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235 #define alloca __builtin_alloca
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236 #else /* not __GNUC__ */
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237 #if HAVE_ALLOCA_H
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238 #include <alloca.h>
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239 #else /* not __GNUC__ or HAVE_ALLOCA_H */
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240 #ifndef _AIX /* Already did AIX, up at the top. */
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241 #if defined (__STDC__) && __STDC__
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242 void *alloca ();
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243 #else
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244 char *alloca ();
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245 #endif
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246 #endif /* not _AIX */
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247 #endif /* not HAVE_ALLOCA_H */
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248 #endif /* not __GNUC__ */
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249
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250 #endif /* not alloca */
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251
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252 #define REGEX_ALLOCATE alloca
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253
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254 /* Assumes a `char *destination' variable. */
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255 #define REGEX_REALLOCATE(source, osize, nsize) \
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256 (destination = (char *) alloca (nsize), \
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257 bcopy (source, destination, osize), \
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258 destination)
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259
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260 /* No need to do anything to free, after alloca. */
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261 #define REGEX_FREE(arg) ((void)0) /* Do nothing! But inhibit gcc warning. */
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262
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263 #endif /* not REGEX_MALLOC */
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264
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265 /* Define how to allocate the failure stack. */
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266
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267 #ifdef REL_ALLOC
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268 #define REGEX_ALLOCATE_STACK(size) \
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269 r_alloc (&failure_stack_ptr, (size))
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270 #define REGEX_REALLOCATE_STACK(source, osize, nsize) \
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271 r_re_alloc (&failure_stack_ptr, (nsize))
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272 #define REGEX_FREE_STACK(ptr) \
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273 r_alloc_free (&failure_stack_ptr)
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274
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275 #else /* not REL_ALLOC */
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276
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277 #ifdef REGEX_MALLOC
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278
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279 #define REGEX_ALLOCATE_STACK malloc
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280 #define REGEX_REALLOCATE_STACK(source, osize, nsize) realloc (source, nsize)
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281 #define REGEX_FREE_STACK free
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282
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283 #else /* not REGEX_MALLOC */
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284
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285 #define REGEX_ALLOCATE_STACK alloca
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286
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287 #define REGEX_REALLOCATE_STACK(source, osize, nsize) \
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288 REGEX_REALLOCATE (source, osize, nsize)
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289 /* No need to explicitly free anything. */
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290 #define REGEX_FREE_STACK(arg)
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291
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292 #endif /* not REGEX_MALLOC */
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293 #endif /* not REL_ALLOC */
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294
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295
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296 /* True if `size1' is non-NULL and PTR is pointing anywhere inside
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297 `string1' or just past its end. This works if PTR is NULL, which is
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298 a good thing. */
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299 #define FIRST_STRING_P(ptr) \
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300 (size1 && string1 <= (ptr) && (ptr) <= string1 + size1)
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301
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302 /* (Re)Allocate N items of type T using malloc, or fail. */
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303 #define TALLOC(n, t) ((t *) malloc ((n) * sizeof (t)))
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304 #define RETALLOC(addr, n, t) ((addr) = (t *) realloc (addr, (n) * sizeof (t)))
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305 #define RETALLOC_IF(addr, n, t) \
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306 if (addr) RETALLOC((addr), (n), t); else (addr) = TALLOC ((n), t)
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307 #define REGEX_TALLOC(n, t) ((t *) REGEX_ALLOCATE ((n) * sizeof (t)))
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308
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309 #define BYTEWIDTH 8 /* In bits. */
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310
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311 #define STREQ(s1, s2) ((strcmp (s1, s2) == 0))
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312
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313 #undef MAX
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314 #undef MIN
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315 #define MAX(a, b) ((a) > (b) ? (a) : (b))
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316 #define MIN(a, b) ((a) < (b) ? (a) : (b))
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317
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318 typedef char boolean;
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319 #define false 0
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320 #define true 1
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321
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322 static int re_match_2_internal ();
14
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323
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324 /* These are the command codes that appear in compiled regular
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325 expressions. Some opcodes are followed by argument bytes. A
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326 command code can specify any interpretation whatsoever for its
332
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327 arguments. Zero bytes may appear in the compiled regular expression. */
14
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parents:
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328
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329 typedef enum
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330 {
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331 no_op = 0,
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332
389
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parents: 340
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333 /* Succeed right away--no more backtracking. */
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parents: 340
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334 succeed,
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parents: 340
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335
14
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336 /* Followed by one byte giving n, then by n literal bytes. */
332
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337 exactn,
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338
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parents:
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339 /* Matches any (more or less) character. */
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340 anychar,
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341
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parents:
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342 /* Matches any one char belonging to specified set. First
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343 following byte is number of bitmap bytes. Then come bytes
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344 for a bitmap saying which chars are in. Bits in each byte
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345 are ordered low-bit-first. A character is in the set if its
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346 bit is 1. A character too large to have a bit in the map is
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347 automatically not in the set. */
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348 charset,
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349
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350 /* Same parameters as charset, but match any character that is
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351 not one of those specified. */
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352 charset_not,
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353
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354 /* Start remembering the text that is matched, for storing in a
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355 register. Followed by one byte with the register number, in
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356 the range 0 to one less than the pattern buffer's re_nsub
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357 field. Then followed by one byte with the number of groups
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358 inner to this one. (This last has to be part of the
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359 start_memory only because we need it in the on_failure_jump
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360 of re_match_2.) */
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parents:
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361 start_memory,
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362
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363 /* Stop remembering the text that is matched and store it in a
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parents:
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364 memory register. Followed by one byte with the register
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365 number, in the range 0 to one less than `re_nsub' in the
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366 pattern buffer, and one byte with the number of inner groups,
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367 just like `start_memory'. (We need the number of inner
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368 groups here because we don't have any easy way of finding the
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369 corresponding start_memory when we're at a stop_memory.) */
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370 stop_memory,
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371
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parents:
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372 /* Match a duplicate of something remembered. Followed by one
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373 byte containing the register number. */
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374 duplicate,
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375
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parents:
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376 /* Fail unless at beginning of line. */
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377 begline,
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parents:
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378
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parents:
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379 /* Fail unless at end of line. */
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parents:
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380 endline,
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parents:
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381
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Jim Meyering <jim@meyering.net>
parents:
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382 /* Succeeds if at beginning of buffer (if emacs) or at beginning
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Jim Meyering <jim@meyering.net>
parents:
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383 of string to be matched (if not). */
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Jim Meyering <jim@meyering.net>
parents:
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384 begbuf,
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Jim Meyering <jim@meyering.net>
parents:
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385
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Jim Meyering <jim@meyering.net>
parents:
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386 /* Analogously, for end of buffer/string. */
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parents:
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387 endbuf,
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Jim Meyering <jim@meyering.net>
parents:
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388
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Jim Meyering <jim@meyering.net>
parents:
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389 /* Followed by two byte relative address to which to jump. */
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Jim Meyering <jim@meyering.net>
parents:
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390 jump,
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parents:
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391
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parents:
diff changeset
392 /* Same as jump, but marks the end of an alternative. */
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parents:
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393 jump_past_alt,
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parents:
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394
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Jim Meyering <jim@meyering.net>
parents:
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395 /* Followed by two-byte relative address of place to resume at
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Jim Meyering <jim@meyering.net>
parents:
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396 in case of failure. */
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
397 on_failure_jump,
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Jim Meyering <jim@meyering.net>
parents:
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398
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
399 /* Like on_failure_jump, but pushes a placeholder instead of the
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Jim Meyering <jim@meyering.net>
parents:
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400 current string position when executed. */
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Jim Meyering <jim@meyering.net>
parents:
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401 on_failure_keep_string_jump,
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Jim Meyering <jim@meyering.net>
parents:
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402
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
403 /* Throw away latest failure point and then jump to following
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
404 two-byte relative address. */
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
405 pop_failure_jump,
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
406
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
407 /* Change to pop_failure_jump if know won't have to backtrack to
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
408 match; otherwise change to jump. This is used to jump
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Jim Meyering <jim@meyering.net>
parents:
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409 back to the beginning of a repeat. If what follows this jump
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Jim Meyering <jim@meyering.net>
parents:
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410 clearly won't match what the repeat does, such that we can be
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Jim Meyering <jim@meyering.net>
parents:
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411 sure that there is no use backtracking out of repetitions
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Jim Meyering <jim@meyering.net>
parents:
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412 already matched, then we change it to a pop_failure_jump.
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Jim Meyering <jim@meyering.net>
parents:
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413 Followed by two-byte address. */
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
414 maybe_pop_jump,
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
415
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
416 /* Jump to following two-byte address, and push a dummy failure
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
417 point. This failure point will be thrown away if an attempt
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
418 is made to use it for a failure. A `+' construct makes this
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Jim Meyering <jim@meyering.net>
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419 before the first repeat. Also used as an intermediary kind
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Jim Meyering <jim@meyering.net>
parents:
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420 of jump when compiling an alternative. */
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
421 dummy_failure_jump,
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
422
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
423 /* Push a dummy failure point and continue. Used at the end of
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
424 alternatives. */
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
425 push_dummy_failure,
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
426
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
427 /* Followed by two-byte relative address and two-byte number n.
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
428 After matching N times, jump to the address upon failure. */
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
429 succeed_n,
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
430
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
431 /* Followed by two-byte relative address, and two-byte number n.
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
432 Jump to the address N times, then fail. */
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
433 jump_n,
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
434
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
435 /* Set the following two-byte relative address to the
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
436 subsequent two-byte number. The address *includes* the two
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
437 bytes of number. */
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
438 set_number_at,
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
439
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
440 wordchar, /* Matches any word-constituent character. */
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
441 notwordchar, /* Matches any char that is not a word-constituent. */
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
442
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
443 wordbeg, /* Succeeds if at word beginning. */
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
444 wordend, /* Succeeds if at word end. */
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
445
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
446 wordbound, /* Succeeds if at a word boundary. */
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
447 notwordbound /* Succeeds if not at a word boundary. */
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
448
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
449 #ifdef emacs
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
450 ,before_dot, /* Succeeds if before point. */
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
451 at_dot, /* Succeeds if at point. */
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
452 after_dot, /* Succeeds if after point. */
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
453
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
454 /* Matches any character whose syntax is specified. Followed by
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
455 a byte which contains a syntax code, e.g., Sword. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
456 syntaxspec,
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
457
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
458 /* Matches any character whose syntax is not that specified. */
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
459 notsyntaxspec
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
460 #endif /* emacs */
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
461 } re_opcode_t;
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
462
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
463 /* Common operations on the compiled pattern. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
464
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
465 /* Store NUMBER in two contiguous bytes starting at DESTINATION. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
466
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
467 #define STORE_NUMBER(destination, number) \
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
468 do { \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
469 (destination)[0] = (number) & 0377; \
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
470 (destination)[1] = (number) >> 8; \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
471 } while (0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
472
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
473 /* Same as STORE_NUMBER, except increment DESTINATION to
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
474 the byte after where the number is stored. Therefore, DESTINATION
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
475 must be an lvalue. */
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
476
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
477 #define STORE_NUMBER_AND_INCR(destination, number) \
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
478 do { \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
479 STORE_NUMBER (destination, number); \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
480 (destination) += 2; \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
481 } while (0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
482
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
483 /* Put into DESTINATION a number stored in two contiguous bytes starting
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
484 at SOURCE. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
485
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
486 #define EXTRACT_NUMBER(destination, source) \
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
487 do { \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
488 (destination) = *(source) & 0377; \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
489 (destination) += SIGN_EXTEND_CHAR (*((source) + 1)) << 8; \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
490 } while (0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
491
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
492 #ifdef DEBUG
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
493 static void
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
494 extract_number (dest, source)
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
495 int *dest;
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
496 unsigned char *source;
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
497 {
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
498 int temp = SIGN_EXTEND_CHAR (*(source + 1));
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
499 *dest = *source & 0377;
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
500 *dest += temp << 8;
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
501 }
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
502
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
503 #ifndef EXTRACT_MACROS /* To debug the macros. */
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
504 #undef EXTRACT_NUMBER
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
505 #define EXTRACT_NUMBER(dest, src) extract_number (&dest, src)
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
506 #endif /* not EXTRACT_MACROS */
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
507
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
508 #endif /* DEBUG */
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
509
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
510 /* Same as EXTRACT_NUMBER, except increment SOURCE to after the number.
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
511 SOURCE must be an lvalue. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
512
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
513 #define EXTRACT_NUMBER_AND_INCR(destination, source) \
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
514 do { \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
515 EXTRACT_NUMBER (destination, source); \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
516 (source) += 2; \
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
517 } while (0)
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
518
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
519 #ifdef DEBUG
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
520 static void
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
521 extract_number_and_incr (destination, source)
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
522 int *destination;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
523 unsigned char **source;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
524 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
525 extract_number (destination, *source);
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
526 *source += 2;
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
527 }
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
528
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
529 #ifndef EXTRACT_MACROS
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
530 #undef EXTRACT_NUMBER_AND_INCR
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
531 #define EXTRACT_NUMBER_AND_INCR(dest, src) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
532 extract_number_and_incr (&dest, &src)
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
533 #endif /* not EXTRACT_MACROS */
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
534
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
535 #endif /* DEBUG */
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
536
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
537 /* If DEBUG is defined, Regex prints many voluminous messages about what
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
538 it is doing (if the variable `debug' is nonzero). If linked with the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
539 main program in `iregex.c', you can enter patterns and strings
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
540 interactively. And if linked with the main program in `main.c' and
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
541 the other test files, you can run the already-written tests. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
542
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
543 #ifdef DEBUG
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
544
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
545 /* We use standard I/O for debugging. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
546 #include <stdio.h>
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
547
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
548 /* It is useful to test things that ``must'' be true when debugging. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
549 #include <assert.h>
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
550
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
551 static int debug = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
552
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
553 #define DEBUG_STATEMENT(e) e
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
554 #define DEBUG_PRINT1(x) if (debug) printf (x)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
555 #define DEBUG_PRINT2(x1, x2) if (debug) printf (x1, x2)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
556 #define DEBUG_PRINT3(x1, x2, x3) if (debug) printf (x1, x2, x3)
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
557 #define DEBUG_PRINT4(x1, x2, x3, x4) if (debug) printf (x1, x2, x3, x4)
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
558 #define DEBUG_PRINT_COMPILED_PATTERN(p, s, e) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
559 if (debug) print_partial_compiled_pattern (s, e)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
560 #define DEBUG_PRINT_DOUBLE_STRING(w, s1, sz1, s2, sz2) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
561 if (debug) print_double_string (w, s1, sz1, s2, sz2)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
562
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
563
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
564 /* Print the fastmap in human-readable form. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
565
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
566 void
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
567 print_fastmap (fastmap)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
568 char *fastmap;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
569 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
570 unsigned was_a_range = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
571 unsigned i = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
572
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
573 while (i < (1 << BYTEWIDTH))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
574 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
575 if (fastmap[i++])
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
576 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
577 was_a_range = 0;
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
578 putchar (i - 1);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
579 while (i < (1 << BYTEWIDTH) && fastmap[i])
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
580 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
581 was_a_range = 1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
582 i++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
583 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
584 if (was_a_range)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
585 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
586 printf ("-");
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
587 putchar (i - 1);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
588 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
589 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
590 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
591 putchar ('\n');
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
592 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
593
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
594
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
595 /* Print a compiled pattern string in human-readable form, starting at
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
596 the START pointer into it and ending just before the pointer END. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
597
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
598 void
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
599 print_partial_compiled_pattern (start, end)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
600 unsigned char *start;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
601 unsigned char *end;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
602 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
603 int mcnt, mcnt2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
604 unsigned char *p = start;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
605 unsigned char *pend = end;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
606
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
607 if (start == NULL)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
608 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
609 printf ("(null)\n");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
610 return;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
611 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
612
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
613 /* Loop over pattern commands. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
614 while (p < pend)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
615 {
81
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
616 printf ("%d:\t", p - start);
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
617
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
618 switch ((re_opcode_t) *p++)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
619 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
620 case no_op:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
621 printf ("/no_op");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
622 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
623
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
624 case exactn:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
625 mcnt = *p++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
626 printf ("/exactn/%d", mcnt);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
627 do
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
628 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
629 putchar ('/');
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
630 putchar (*p++);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
631 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
632 while (--mcnt);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
633 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
634
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
635 case start_memory:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
636 mcnt = *p++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
637 printf ("/start_memory/%d/%d", mcnt, *p++);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
638 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
639
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
640 case stop_memory:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
641 mcnt = *p++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
642 printf ("/stop_memory/%d/%d", mcnt, *p++);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
643 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
644
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
645 case duplicate:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
646 printf ("/duplicate/%d", *p++);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
647 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
648
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
649 case anychar:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
650 printf ("/anychar");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
651 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
652
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
653 case charset:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
654 case charset_not:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
655 {
81
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
656 register int c, last = -100;
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
657 register int in_range = 0;
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
658
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
659 printf ("/charset [%s",
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
660 (re_opcode_t) *(p - 1) == charset_not ? "^" : "");
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
661
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
662 assert (p + *p < pend);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
663
81
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
664 for (c = 0; c < 256; c++)
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
665 if (c / 8 < *p
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
666 && (p[1 + (c/8)] & (1 << (c % 8))))
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
667 {
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
668 /* Are we starting a range? */
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
669 if (last + 1 == c && ! in_range)
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
670 {
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
671 putchar ('-');
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
672 in_range = 1;
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
673 }
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
674 /* Have we broken a range? */
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
675 else if (last + 1 != c && in_range)
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
676 {
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
677 putchar (last);
81
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
678 in_range = 0;
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
679 }
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
680
81
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
681 if (! in_range)
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
682 putchar (c);
81
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
683
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
684 last = c;
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
685 }
81
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
686
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
687 if (in_range)
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
688 putchar (last);
81
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
689
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
690 putchar (']');
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
691
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
692 p += 1 + *p;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
693 }
81
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
694 break;
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
695
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
696 case begline:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
697 printf ("/begline");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
698 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
699
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
700 case endline:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
701 printf ("/endline");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
702 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
703
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
704 case on_failure_jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
705 extract_number_and_incr (&mcnt, &p);
81
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
706 printf ("/on_failure_jump to %d", p + mcnt - start);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
707 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
708
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
709 case on_failure_keep_string_jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
710 extract_number_and_incr (&mcnt, &p);
81
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
711 printf ("/on_failure_keep_string_jump to %d", p + mcnt - start);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
712 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
713
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
714 case dummy_failure_jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
715 extract_number_and_incr (&mcnt, &p);
81
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
716 printf ("/dummy_failure_jump to %d", p + mcnt - start);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
717 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
718
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
719 case push_dummy_failure:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
720 printf ("/push_dummy_failure");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
721 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
722
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
723 case maybe_pop_jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
724 extract_number_and_incr (&mcnt, &p);
81
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
725 printf ("/maybe_pop_jump to %d", p + mcnt - start);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
726 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
727
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
728 case pop_failure_jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
729 extract_number_and_incr (&mcnt, &p);
81
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
730 printf ("/pop_failure_jump to %d", p + mcnt - start);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
731 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
732
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
733 case jump_past_alt:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
734 extract_number_and_incr (&mcnt, &p);
81
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
735 printf ("/jump_past_alt to %d", p + mcnt - start);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
736 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
737
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
738 case jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
739 extract_number_and_incr (&mcnt, &p);
81
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
740 printf ("/jump to %d", p + mcnt - start);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
741 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
742
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
743 case succeed_n:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
744 extract_number_and_incr (&mcnt, &p);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
745 extract_number_and_incr (&mcnt2, &p);
81
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
746 printf ("/succeed_n to %d, %d times", p + mcnt - start, mcnt2);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
747 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
748
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
749 case jump_n:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
750 extract_number_and_incr (&mcnt, &p);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
751 extract_number_and_incr (&mcnt2, &p);
81
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
752 printf ("/jump_n to %d, %d times", p + mcnt - start, mcnt2);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
753 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
754
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
755 case set_number_at:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
756 extract_number_and_incr (&mcnt, &p);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
757 extract_number_and_incr (&mcnt2, &p);
81
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
758 printf ("/set_number_at location %d to %d", p + mcnt - start, mcnt2);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
759 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
760
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
761 case wordbound:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
762 printf ("/wordbound");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
763 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
764
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
765 case notwordbound:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
766 printf ("/notwordbound");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
767 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
768
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
769 case wordbeg:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
770 printf ("/wordbeg");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
771 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
772
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
773 case wordend:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
774 printf ("/wordend");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
775
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
776 #ifdef emacs
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
777 case before_dot:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
778 printf ("/before_dot");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
779 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
780
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
781 case at_dot:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
782 printf ("/at_dot");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
783 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
784
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
785 case after_dot:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
786 printf ("/after_dot");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
787 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
788
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
789 case syntaxspec:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
790 printf ("/syntaxspec");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
791 mcnt = *p++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
792 printf ("/%d", mcnt);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
793 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
794
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
795 case notsyntaxspec:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
796 printf ("/notsyntaxspec");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
797 mcnt = *p++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
798 printf ("/%d", mcnt);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
799 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
800 #endif /* emacs */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
801
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
802 case wordchar:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
803 printf ("/wordchar");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
804 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
805
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
806 case notwordchar:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
807 printf ("/notwordchar");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
808 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
809
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
810 case begbuf:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
811 printf ("/begbuf");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
812 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
813
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
814 case endbuf:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
815 printf ("/endbuf");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
816 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
817
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
818 default:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
819 printf ("?%d", *(p-1));
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
820 }
81
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
821
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
822 putchar ('\n');
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
823 }
81
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
824
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
825 printf ("%d:\tend of pattern.\n", p - start);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
826 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
827
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
828
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
829 void
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
830 print_compiled_pattern (bufp)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
831 struct re_pattern_buffer *bufp;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
832 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
833 unsigned char *buffer = bufp->buffer;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
834
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
835 print_partial_compiled_pattern (buffer, buffer + bufp->used);
399
c41f22e4dae3 sync from FSF
Jim Meyering <jim@meyering.net>
parents: 393
diff changeset
836 printf ("%d bytes used/%d bytes allocated.\n", bufp->used, bufp->allocated);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
837
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
838 if (bufp->fastmap_accurate && bufp->fastmap)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
839 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
840 printf ("fastmap: ");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
841 print_fastmap (bufp->fastmap);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
842 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
843
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
844 printf ("re_nsub: %d\t", bufp->re_nsub);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
845 printf ("regs_alloc: %d\t", bufp->regs_allocated);
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
846 printf ("can_be_null: %d\t", bufp->can_be_null);
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
847 printf ("newline_anchor: %d\n", bufp->newline_anchor);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
848 printf ("no_sub: %d\t", bufp->no_sub);
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
849 printf ("not_bol: %d\t", bufp->not_bol);
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
850 printf ("not_eol: %d\t", bufp->not_eol);
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
851 printf ("syntax: %d\n", bufp->syntax);
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
852 /* Perhaps we should print the translate table? */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
853 }
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
854
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
855
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
856 void
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parents:
diff changeset
857 print_double_string (where, string1, size1, string2, size2)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
858 const char *where;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
859 const char *string1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
860 const char *string2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
861 int size1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
862 int size2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
863 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
864 unsigned this_char;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
865
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
866 if (where == NULL)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
867 printf ("(null)");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
868 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
869 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
870 if (FIRST_STRING_P (where))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
871 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
872 for (this_char = where - string1; this_char < size1; this_char++)
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
873 putchar (string1[this_char]);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
874
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
875 where = string2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
876 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
877
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
878 for (this_char = where - string2; this_char < size2; this_char++)
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
879 putchar (string2[this_char]);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
880 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
881 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
882
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
883 #else /* not DEBUG */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
884
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Jim Meyering <jim@meyering.net>
parents:
diff changeset
885 #undef assert
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
886 #define assert(e)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
887
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
888 #define DEBUG_STATEMENT(e)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
889 #define DEBUG_PRINT1(x)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
890 #define DEBUG_PRINT2(x1, x2)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
891 #define DEBUG_PRINT3(x1, x2, x3)
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
892 #define DEBUG_PRINT4(x1, x2, x3, x4)
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
893 #define DEBUG_PRINT_COMPILED_PATTERN(p, s, e)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
894 #define DEBUG_PRINT_DOUBLE_STRING(w, s1, sz1, s2, sz2)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
895
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
896 #endif /* not DEBUG */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
897
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
898 /* Set by `re_set_syntax' to the current regexp syntax to recognize. Can
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
899 also be assigned to arbitrarily: each pattern buffer stores its own
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
900 syntax, so it can be changed between regex compilations. */
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
901 /* This has no initializer because initialized variables in Emacs
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
902 become read-only after dumping. */
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
903 reg_syntax_t re_syntax_options;
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
904
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
905
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
906 /* Specify the precise syntax of regexps for compilation. This provides
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
907 for compatibility for various utilities which historically have
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
908 different, incompatible syntaxes.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
909
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
910 The argument SYNTAX is a bit mask comprised of the various bits
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
911 defined in regex.h. We return the old syntax. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
912
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
913 reg_syntax_t
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
914 re_set_syntax (syntax)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
915 reg_syntax_t syntax;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
916 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
917 reg_syntax_t ret = re_syntax_options;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
918
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
919 re_syntax_options = syntax;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
920 return ret;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
921 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
922
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
923 /* This table gives an error message for each of the error codes listed
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
924 in regex.h. Obviously the order here has to be same as there.
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
925 POSIX doesn't require that we do anything for REG_NOERROR,
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
926 but why not be nice? */
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
927
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
928 static const char *re_error_msgid[] =
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
929 { "Success", /* REG_NOERROR */
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
930 "No match", /* REG_NOMATCH */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
931 "Invalid regular expression", /* REG_BADPAT */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
932 "Invalid collation character", /* REG_ECOLLATE */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
933 "Invalid character class name", /* REG_ECTYPE */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
934 "Trailing backslash", /* REG_EESCAPE */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
935 "Invalid back reference", /* REG_ESUBREG */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
936 "Unmatched [ or [^", /* REG_EBRACK */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
937 "Unmatched ( or \\(", /* REG_EPAREN */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
938 "Unmatched \\{", /* REG_EBRACE */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
939 "Invalid content of \\{\\}", /* REG_BADBR */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
940 "Invalid range end", /* REG_ERANGE */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
941 "Memory exhausted", /* REG_ESPACE */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
942 "Invalid preceding regular expression", /* REG_BADRPT */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
943 "Premature end of regular expression", /* REG_EEND */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
944 "Regular expression too big", /* REG_ESIZE */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
945 "Unmatched ) or \\)", /* REG_ERPAREN */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
946 };
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
947
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
948 /* Avoiding alloca during matching, to placate r_alloc. */
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
949
217
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
950 /* Define MATCH_MAY_ALLOCATE unless we need to make sure that the
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
951 searching and matching functions should not call alloca. On some
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
952 systems, alloca is implemented in terms of malloc, and if we're
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
953 using the relocating allocator routines, then malloc could cause a
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
954 relocation, which might (if the strings being searched are in the
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
955 ralloc heap) shift the data out from underneath the regexp
103
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
956 routines.
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
957
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
958 Here's another reason to avoid allocation: Emacs
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
959 processes input from X in a signal handler; processing X input may
103
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
960 call malloc; if input arrives while a matching routine is calling
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
961 malloc, then we're scrod. But Emacs can't just block input while
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
962 calling matching routines; then we don't notice interrupts when
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
963 they come in. So, Emacs blocks input around all regexp calls
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
964 except the matching calls, which it leaves unprotected, in the
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
965 faith that they will not malloc. */
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
966
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
967 /* Normally, this is fine. */
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
968 #define MATCH_MAY_ALLOCATE
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
969
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
970 /* When using GNU C, we are not REALLY using the C alloca, no matter
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
971 what config.h may say. So don't take precautions for it. */
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
972 #ifdef __GNUC__
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
973 #undef C_ALLOCA
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
974 #endif
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
975
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
976 /* The match routines may not allocate if (1) they would do it with malloc
415
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
977 and (2) it's not safe for them to use malloc.
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
978 Note that if REL_ALLOC is defined, matching would not use malloc for the
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
979 failure stack, but we would still use it for the register vectors;
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
980 so REL_ALLOC should not affect this. */
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
981 #if (defined (C_ALLOCA) || defined (REGEX_MALLOC)) && defined (emacs)
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
982 #undef MATCH_MAY_ALLOCATE
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
983 #endif
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
984
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
985
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
986 /* Failure stack declarations and macros; both re_compile_fastmap and
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
987 re_match_2 use a failure stack. These have to be macros because of
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
988 REGEX_ALLOCATE_STACK. */
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
989
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
990
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
991 /* Number of failure points for which to initially allocate space
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
992 when matching. If this number is exceeded, we allocate more
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
993 space, so it is not a hard limit. */
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
994 #ifndef INIT_FAILURE_ALLOC
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
995 #define INIT_FAILURE_ALLOC 5
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
996 #endif
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
997
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
998 /* Roughly the maximum number of failure points on the stack. Would be
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
999 exactly that if always used MAX_FAILURE_SPACE each time we failed.
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1000 This is a variable only so users of regex can assign to it; we never
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1001 change it ourselves. */
415
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1002 #if defined (MATCH_MAY_ALLOCATE)
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1003 int re_max_failures = 200000;
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1004 #else
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1005 int re_max_failures = 2000;
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1006 #endif
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1007
415
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1008 union fail_stack_elt
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1009 {
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1010 unsigned char *pointer;
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1011 int integer;
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1012 };
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1013
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1014 typedef union fail_stack_elt fail_stack_elt_t;
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1015
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1016 typedef struct
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1017 {
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1018 fail_stack_elt_t *stack;
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1019 unsigned size;
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1020 unsigned avail; /* Offset of next open position. */
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1021 } fail_stack_type;
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1022
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1023 #define FAIL_STACK_EMPTY() (fail_stack.avail == 0)
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1024 #define FAIL_STACK_PTR_EMPTY() (fail_stack_ptr->avail == 0)
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1025 #define FAIL_STACK_FULL() (fail_stack.avail == fail_stack.size)
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1026
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1027
440
79626753a234 merge with 1.11.1a
Jim Meyering <jim@meyering.net>
parents: 415
diff changeset
1028 /* Define macros to initialize and free the failure stack.
79626753a234 merge with 1.11.1a
Jim Meyering <jim@meyering.net>
parents: 415
diff changeset
1029 Do `return -2' if the alloc fails. */
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1030
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1031 #ifdef MATCH_MAY_ALLOCATE
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1032 #define INIT_FAIL_STACK() \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1033 do { \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1034 fail_stack.stack = (fail_stack_elt_t *) \
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1035 REGEX_ALLOCATE_STACK (INIT_FAILURE_ALLOC * sizeof (fail_stack_elt_t)); \
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1036 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1037 if (fail_stack.stack == NULL) \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1038 return -2; \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1039 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1040 fail_stack.size = INIT_FAILURE_ALLOC; \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1041 fail_stack.avail = 0; \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1042 } while (0)
440
79626753a234 merge with 1.11.1a
Jim Meyering <jim@meyering.net>
parents: 415
diff changeset
1043
79626753a234 merge with 1.11.1a
Jim Meyering <jim@meyering.net>
parents: 415
diff changeset
1044 #define RESET_FAIL_STACK() REGEX_FREE_STACK (fail_stack.stack)
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1045 #else
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1046 #define INIT_FAIL_STACK() \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1047 do { \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1048 fail_stack.avail = 0; \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1049 } while (0)
440
79626753a234 merge with 1.11.1a
Jim Meyering <jim@meyering.net>
parents: 415
diff changeset
1050
79626753a234 merge with 1.11.1a
Jim Meyering <jim@meyering.net>
parents: 415
diff changeset
1051 #define RESET_FAIL_STACK()
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1052 #endif
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1053
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1054
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1055 /* Double the size of FAIL_STACK, up to approximately `re_max_failures' items.
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1056
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1057 Return 1 if succeeds, and 0 if either ran out of memory
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1058 allocating space for it or it was already too large.
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1059
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1060 REGEX_REALLOCATE_STACK requires `destination' be declared. */
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1061
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1062 #define DOUBLE_FAIL_STACK(fail_stack) \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1063 ((fail_stack).size > re_max_failures * MAX_FAILURE_ITEMS \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1064 ? 0 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1065 : ((fail_stack).stack = (fail_stack_elt_t *) \
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1066 REGEX_REALLOCATE_STACK ((fail_stack).stack, \
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1067 (fail_stack).size * sizeof (fail_stack_elt_t), \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1068 ((fail_stack).size << 1) * sizeof (fail_stack_elt_t)), \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1069 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1070 (fail_stack).stack == NULL \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1071 ? 0 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1072 : ((fail_stack).size <<= 1, \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1073 1)))
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1074
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1075
415
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1076 /* Push pointer POINTER on FAIL_STACK.
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1077 Return 1 if was able to do so and 0 if ran out of memory allocating
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1078 space to do so. */
415
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1079 #define PUSH_PATTERN_OP(POINTER, FAIL_STACK) \
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1080 ((FAIL_STACK_FULL () \
415
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1081 && !DOUBLE_FAIL_STACK (FAIL_STACK)) \
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1082 ? 0 \
415
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1083 : ((FAIL_STACK).stack[(FAIL_STACK).avail++].pointer = POINTER, \
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1084 1))
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1085
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1086 /* Push a pointer value onto the failure stack.
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1087 Assumes the variable `fail_stack'. Probably should only
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
1088 be called from within `PUSH_FAILURE_POINT'. */
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1089 #define PUSH_FAILURE_POINTER(item) \
415
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1090 fail_stack.stack[fail_stack.avail++].pointer = (unsigned char *) (item)
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1091
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1092 /* This pushes an integer-valued item onto the failure stack.
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1093 Assumes the variable `fail_stack'. Probably should only
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1094 be called from within `PUSH_FAILURE_POINT'. */
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1095 #define PUSH_FAILURE_INT(item) \
415
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1096 fail_stack.stack[fail_stack.avail++].integer = (item)
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1097
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1098 /* Push a fail_stack_elt_t value onto the failure stack.
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1099 Assumes the variable `fail_stack'. Probably should only
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1100 be called from within `PUSH_FAILURE_POINT'. */
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1101 #define PUSH_FAILURE_ELT(item) \
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1102 fail_stack.stack[fail_stack.avail++] = (item)
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1103
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1104 /* These three POP... operations complement the three PUSH... operations.
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1105 All assume that `fail_stack' is nonempty. */
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1106 #define POP_FAILURE_POINTER() fail_stack.stack[--fail_stack.avail].pointer
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1107 #define POP_FAILURE_INT() fail_stack.stack[--fail_stack.avail].integer
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1108 #define POP_FAILURE_ELT() fail_stack.stack[--fail_stack.avail]
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1109
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1110 /* Used to omit pushing failure point id's when we're not debugging. */
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1111 #ifdef DEBUG
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1112 #define DEBUG_PUSH PUSH_FAILURE_INT
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1113 #define DEBUG_POP(item_addr) *(item_addr) = POP_FAILURE_INT ()
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1114 #else
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1115 #define DEBUG_PUSH(item)
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1116 #define DEBUG_POP(item_addr)
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1117 #endif
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1118
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1119
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1120 /* Push the information about the state we will need
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1121 if we ever fail back to it.
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1122
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1123 Requires variables fail_stack, regstart, regend, reg_info, and
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1124 num_regs be declared. DOUBLE_FAIL_STACK requires `destination' be
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1125 declared.
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1126
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1127 Does `return FAILURE_CODE' if runs out of memory. */
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1128
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1129 #define PUSH_FAILURE_POINT(pattern_place, string_place, failure_code) \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1130 do { \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1131 char *destination; \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1132 /* Must be int, so when we don't save any registers, the arithmetic \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1133 of 0 + -1 isn't done as unsigned. */ \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1134 int this_reg; \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1135 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1136 DEBUG_STATEMENT (failure_id++); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1137 DEBUG_STATEMENT (nfailure_points_pushed++); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1138 DEBUG_PRINT2 ("\nPUSH_FAILURE_POINT #%u:\n", failure_id); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1139 DEBUG_PRINT2 (" Before push, next avail: %d\n", (fail_stack).avail);\
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1140 DEBUG_PRINT2 (" size: %d\n", (fail_stack).size);\
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1141 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1142 DEBUG_PRINT2 (" slots needed: %d\n", NUM_FAILURE_ITEMS); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1143 DEBUG_PRINT2 (" available: %d\n", REMAINING_AVAIL_SLOTS); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1144 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1145 /* Ensure we have enough space allocated for what we will push. */ \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1146 while (REMAINING_AVAIL_SLOTS < NUM_FAILURE_ITEMS) \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1147 { \
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1148 if (!DOUBLE_FAIL_STACK (fail_stack)) \
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1149 return failure_code; \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1150 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1151 DEBUG_PRINT2 ("\n Doubled stack; size now: %d\n", \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1152 (fail_stack).size); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1153 DEBUG_PRINT2 (" slots available: %d\n", REMAINING_AVAIL_SLOTS);\
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1154 } \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1155 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1156 /* Push the info, starting with the registers. */ \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1157 DEBUG_PRINT1 ("\n"); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1158 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1159 for (this_reg = lowest_active_reg; this_reg <= highest_active_reg; \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1160 this_reg++) \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1161 { \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1162 DEBUG_PRINT2 (" Pushing reg: %d\n", this_reg); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1163 DEBUG_STATEMENT (num_regs_pushed++); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1164 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1165 DEBUG_PRINT2 (" start: 0x%x\n", regstart[this_reg]); \
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1166 PUSH_FAILURE_POINTER (regstart[this_reg]); \
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1167 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1168 DEBUG_PRINT2 (" end: 0x%x\n", regend[this_reg]); \
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1169 PUSH_FAILURE_POINTER (regend[this_reg]); \
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1170 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1171 DEBUG_PRINT2 (" info: 0x%x\n ", reg_info[this_reg]); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1172 DEBUG_PRINT2 (" match_null=%d", \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1173 REG_MATCH_NULL_STRING_P (reg_info[this_reg])); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1174 DEBUG_PRINT2 (" active=%d", IS_ACTIVE (reg_info[this_reg])); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1175 DEBUG_PRINT2 (" matched_something=%d", \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1176 MATCHED_SOMETHING (reg_info[this_reg])); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1177 DEBUG_PRINT2 (" ever_matched=%d", \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1178 EVER_MATCHED_SOMETHING (reg_info[this_reg])); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1179 DEBUG_PRINT1 ("\n"); \
415
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1180 PUSH_FAILURE_ELT (reg_info[this_reg].word); \
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1181 } \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1182 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1183 DEBUG_PRINT2 (" Pushing low active reg: %d\n", lowest_active_reg);\
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1184 PUSH_FAILURE_INT (lowest_active_reg); \
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1185 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1186 DEBUG_PRINT2 (" Pushing high active reg: %d\n", highest_active_reg);\
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1187 PUSH_FAILURE_INT (highest_active_reg); \
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1188 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1189 DEBUG_PRINT2 (" Pushing pattern 0x%x: ", pattern_place); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1190 DEBUG_PRINT_COMPILED_PATTERN (bufp, pattern_place, pend); \
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1191 PUSH_FAILURE_POINTER (pattern_place); \
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1192 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1193 DEBUG_PRINT2 (" Pushing string 0x%x: `", string_place); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1194 DEBUG_PRINT_DOUBLE_STRING (string_place, string1, size1, string2, \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1195 size2); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1196 DEBUG_PRINT1 ("'\n"); \
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1197 PUSH_FAILURE_POINTER (string_place); \
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1198 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1199 DEBUG_PRINT2 (" Pushing failure id: %u\n", failure_id); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1200 DEBUG_PUSH (failure_id); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1201 } while (0)
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1202
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1203 /* This is the number of items that are pushed and popped on the stack
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1204 for each register. */
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1205 #define NUM_REG_ITEMS 3
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1206
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1207 /* Individual items aside from the registers. */
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1208 #ifdef DEBUG
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1209 #define NUM_NONREG_ITEMS 5 /* Includes failure point id. */
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1210 #else
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1211 #define NUM_NONREG_ITEMS 4
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1212 #endif
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1213
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1214 /* We push at most this many items on the stack. */
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1215 #define MAX_FAILURE_ITEMS ((num_regs - 1) * NUM_REG_ITEMS + NUM_NONREG_ITEMS)
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1216
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1217 /* We actually push this many items. */
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1218 #define NUM_FAILURE_ITEMS \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1219 ((highest_active_reg - lowest_active_reg + 1) * NUM_REG_ITEMS \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1220 + NUM_NONREG_ITEMS)
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1221
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1222 /* How many items can still be added to the stack without overflowing it. */
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1223 #define REMAINING_AVAIL_SLOTS ((fail_stack).size - (fail_stack).avail)
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1224
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1225
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1226 /* Pops what PUSH_FAIL_STACK pushes.
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1227
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1228 We restore into the parameters, all of which should be lvalues:
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1229 STR -- the saved data position.
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1230 PAT -- the saved pattern position.
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1231 LOW_REG, HIGH_REG -- the highest and lowest active registers.
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1232 REGSTART, REGEND -- arrays of string positions.
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1233 REG_INFO -- array of information about each subexpression.
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1234
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1235 Also assumes the variables `fail_stack' and (if debugging), `bufp',
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1236 `pend', `string1', `size1', `string2', and `size2'. */
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1237
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1238 #define POP_FAILURE_POINT(str, pat, low_reg, high_reg, regstart, regend, reg_info)\
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1239 { \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1240 DEBUG_STATEMENT (fail_stack_elt_t failure_id;) \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1241 int this_reg; \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1242 const unsigned char *string_temp; \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1243 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1244 assert (!FAIL_STACK_EMPTY ()); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1245 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1246 /* Remove failure points and point to how many regs pushed. */ \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1247 DEBUG_PRINT1 ("POP_FAILURE_POINT:\n"); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1248 DEBUG_PRINT2 (" Before pop, next avail: %d\n", fail_stack.avail); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1249 DEBUG_PRINT2 (" size: %d\n", fail_stack.size); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1250 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1251 assert (fail_stack.avail >= NUM_NONREG_ITEMS); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1252 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1253 DEBUG_POP (&failure_id); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1254 DEBUG_PRINT2 (" Popping failure id: %u\n", failure_id); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1255 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1256 /* If the saved string location is NULL, it came from an \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1257 on_failure_keep_string_jump opcode, and we want to throw away the \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1258 saved NULL, thus retaining our current position in the string. */ \
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1259 string_temp = POP_FAILURE_POINTER (); \
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1260 if (string_temp != NULL) \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1261 str = (const char *) string_temp; \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1262 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1263 DEBUG_PRINT2 (" Popping string 0x%x: `", str); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1264 DEBUG_PRINT_DOUBLE_STRING (str, string1, size1, string2, size2); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1265 DEBUG_PRINT1 ("'\n"); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1266 \
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1267 pat = (unsigned char *) POP_FAILURE_POINTER (); \
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1268 DEBUG_PRINT2 (" Popping pattern 0x%x: ", pat); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1269 DEBUG_PRINT_COMPILED_PATTERN (bufp, pat, pend); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1270 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1271 /* Restore register info. */ \
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1272 high_reg = (unsigned) POP_FAILURE_INT (); \
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1273 DEBUG_PRINT2 (" Popping high active reg: %d\n", high_reg); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1274 \
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1275 low_reg = (unsigned) POP_FAILURE_INT (); \
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1276 DEBUG_PRINT2 (" Popping low active reg: %d\n", low_reg); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1277 \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1278 for (this_reg = high_reg; this_reg >= low_reg; this_reg--) \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1279 { \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1280 DEBUG_PRINT2 (" Popping reg: %d\n", this_reg); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1281 \
415
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1282 reg_info[this_reg].word = POP_FAILURE_ELT (); \
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1283 DEBUG_PRINT2 (" info: 0x%x\n", reg_info[this_reg]); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1284 \
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1285 regend[this_reg] = (const char *) POP_FAILURE_POINTER (); \
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1286 DEBUG_PRINT2 (" end: 0x%x\n", regend[this_reg]); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1287 \
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1288 regstart[this_reg] = (const char *) POP_FAILURE_POINTER (); \
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1289 DEBUG_PRINT2 (" start: 0x%x\n", regstart[this_reg]); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1290 } \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1291 \
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
1292 set_regs_matched_done = 0; \
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1293 DEBUG_STATEMENT (nfailure_points_popped++); \
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1294 } /* POP_FAILURE_POINT */
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1295
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1296
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1297
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1298 /* Structure for per-register (a.k.a. per-group) information.
415
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1299 Other register information, such as the
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1300 starting and ending positions (which are addresses), and the list of
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1301 inner groups (which is a bits list) are maintained in separate
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1302 variables.
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1303
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1304 We are making a (strictly speaking) nonportable assumption here: that
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1305 the compiler will pack our bit fields into something that fits into
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1306 the type of `word', i.e., is something that fits into one item on the
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1307 failure stack. */
415
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
1308
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1309 typedef union
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1310 {
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1311 fail_stack_elt_t word;
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1312 struct
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1313 {
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1314 /* This field is one if this group can match the empty string,
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1315 zero if not. If not yet determined, `MATCH_NULL_UNSET_VALUE'. */
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1316 #define MATCH_NULL_UNSET_VALUE 3
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1317 unsigned match_null_string_p : 2;
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1318 unsigned is_active : 1;
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1319 unsigned matched_something : 1;
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1320 unsigned ever_matched_something : 1;
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1321 } bits;
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1322 } register_info_type;
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1323
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1324 #define REG_MATCH_NULL_STRING_P(R) ((R).bits.match_null_string_p)
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1325 #define IS_ACTIVE(R) ((R).bits.is_active)
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1326 #define MATCHED_SOMETHING(R) ((R).bits.matched_something)
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1327 #define EVER_MATCHED_SOMETHING(R) ((R).bits.ever_matched_something)
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1328
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1329
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1330 /* Call this when have matched a real character; it sets `matched' flags
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1331 for the subexpressions which we are currently inside. Also records
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1332 that those subexprs have matched. */
393
bbe02c28aff4 (SET_REGS_MATCHED): Enclose if-stmt in `do {...} while(0)'
Jim Meyering <jim@meyering.net>
parents: 389
diff changeset
1333 #define SET_REGS_MATCHED() \
bbe02c28aff4 (SET_REGS_MATCHED): Enclose if-stmt in `do {...} while(0)'
Jim Meyering <jim@meyering.net>
parents: 389
diff changeset
1334 do \
bbe02c28aff4 (SET_REGS_MATCHED): Enclose if-stmt in `do {...} while(0)'
Jim Meyering <jim@meyering.net>
parents: 389
diff changeset
1335 { \
bbe02c28aff4 (SET_REGS_MATCHED): Enclose if-stmt in `do {...} while(0)'
Jim Meyering <jim@meyering.net>
parents: 389
diff changeset
1336 if (!set_regs_matched_done) \
bbe02c28aff4 (SET_REGS_MATCHED): Enclose if-stmt in `do {...} while(0)'
Jim Meyering <jim@meyering.net>
parents: 389
diff changeset
1337 { \
bbe02c28aff4 (SET_REGS_MATCHED): Enclose if-stmt in `do {...} while(0)'
Jim Meyering <jim@meyering.net>
parents: 389
diff changeset
1338 unsigned r; \
bbe02c28aff4 (SET_REGS_MATCHED): Enclose if-stmt in `do {...} while(0)'
Jim Meyering <jim@meyering.net>
parents: 389
diff changeset
1339 set_regs_matched_done = 1; \
bbe02c28aff4 (SET_REGS_MATCHED): Enclose if-stmt in `do {...} while(0)'
Jim Meyering <jim@meyering.net>
parents: 389
diff changeset
1340 for (r = lowest_active_reg; r <= highest_active_reg; r++) \
bbe02c28aff4 (SET_REGS_MATCHED): Enclose if-stmt in `do {...} while(0)'
Jim Meyering <jim@meyering.net>
parents: 389
diff changeset
1341 { \
bbe02c28aff4 (SET_REGS_MATCHED): Enclose if-stmt in `do {...} while(0)'
Jim Meyering <jim@meyering.net>
parents: 389
diff changeset
1342 MATCHED_SOMETHING (reg_info[r]) \
bbe02c28aff4 (SET_REGS_MATCHED): Enclose if-stmt in `do {...} while(0)'
Jim Meyering <jim@meyering.net>
parents: 389
diff changeset
1343 = EVER_MATCHED_SOMETHING (reg_info[r]) \
bbe02c28aff4 (SET_REGS_MATCHED): Enclose if-stmt in `do {...} while(0)'
Jim Meyering <jim@meyering.net>
parents: 389
diff changeset
1344 = 1; \
bbe02c28aff4 (SET_REGS_MATCHED): Enclose if-stmt in `do {...} while(0)'
Jim Meyering <jim@meyering.net>
parents: 389
diff changeset
1345 } \
bbe02c28aff4 (SET_REGS_MATCHED): Enclose if-stmt in `do {...} while(0)'
Jim Meyering <jim@meyering.net>
parents: 389
diff changeset
1346 } \
bbe02c28aff4 (SET_REGS_MATCHED): Enclose if-stmt in `do {...} while(0)'
Jim Meyering <jim@meyering.net>
parents: 389
diff changeset
1347 } \
bbe02c28aff4 (SET_REGS_MATCHED): Enclose if-stmt in `do {...} while(0)'
Jim Meyering <jim@meyering.net>
parents: 389
diff changeset
1348 while (0)
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1349
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1350 /* Registers are set to a sentinel when they haven't yet matched. */
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
1351 static char reg_unset_dummy;
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
1352 #define REG_UNSET_VALUE (&reg_unset_dummy)
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1353 #define REG_UNSET(e) ((e) == REG_UNSET_VALUE)
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
1354
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1355 /* Subroutine declarations and macros for regex_compile. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1356
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1357 static void store_op1 (), store_op2 ();
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1358 static void insert_op1 (), insert_op2 ();
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1359 static boolean at_begline_loc_p (), at_endline_loc_p ();
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1360 static boolean group_in_compile_stack ();
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1361 static reg_errcode_t compile_range ();
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1362
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1363 /* Fetch the next character in the uncompiled pattern---translating it
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1364 if necessary. Also cast from a signed character in the constant
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1365 string passed to us by the user to an unsigned char that we can use
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1366 as an array index (in, e.g., `translate'). */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1367 #define PATFETCH(c) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1368 do {if (p == pend) return REG_EEND; \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1369 c = (unsigned char) *p++; \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1370 if (translate) c = translate[c]; \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1371 } while (0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1372
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1373 /* Fetch the next character in the uncompiled pattern, with no
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1374 translation. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1375 #define PATFETCH_RAW(c) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1376 do {if (p == pend) return REG_EEND; \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1377 c = (unsigned char) *p++; \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1378 } while (0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1379
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1380 /* Go backwards one character in the pattern. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1381 #define PATUNFETCH p--
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1382
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1383
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1384 /* If `translate' is non-null, return translate[D], else just D. We
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1385 cast the subscript to translate because some data is declared as
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1386 `char *', to avoid warnings when a string constant is passed. But
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1387 when we use a character as a subscript we must make it unsigned. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1388 #define TRANSLATE(d) (translate ? translate[(unsigned char) (d)] : (d))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1389
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1390
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1391 /* Macros for outputting the compiled pattern into `buffer'. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1392
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1393 /* If the buffer isn't allocated when it comes in, use this. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1394 #define INIT_BUF_SIZE 32
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1395
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1396 /* Make sure we have at least N more bytes of space in buffer. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1397 #define GET_BUFFER_SPACE(n) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1398 while (b - bufp->buffer + (n) > bufp->allocated) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1399 EXTEND_BUFFER ()
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1400
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1401 /* Make sure we have one more byte of buffer space and then add C to it. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1402 #define BUF_PUSH(c) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1403 do { \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1404 GET_BUFFER_SPACE (1); \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1405 *b++ = (unsigned char) (c); \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1406 } while (0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1407
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1408
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1409 /* Ensure we have two more bytes of buffer space and then append C1 and C2. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1410 #define BUF_PUSH_2(c1, c2) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1411 do { \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1412 GET_BUFFER_SPACE (2); \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1413 *b++ = (unsigned char) (c1); \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1414 *b++ = (unsigned char) (c2); \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1415 } while (0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1416
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1417
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1418 /* As with BUF_PUSH_2, except for three bytes. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1419 #define BUF_PUSH_3(c1, c2, c3) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1420 do { \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1421 GET_BUFFER_SPACE (3); \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1422 *b++ = (unsigned char) (c1); \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1423 *b++ = (unsigned char) (c2); \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1424 *b++ = (unsigned char) (c3); \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1425 } while (0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1426
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1427
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1428 /* Store a jump with opcode OP at LOC to location TO. We store a
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1429 relative address offset by the three bytes the jump itself occupies. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1430 #define STORE_JUMP(op, loc, to) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1431 store_op1 (op, loc, (to) - (loc) - 3)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1432
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1433 /* Likewise, for a two-argument jump. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1434 #define STORE_JUMP2(op, loc, to, arg) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1435 store_op2 (op, loc, (to) - (loc) - 3, arg)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1436
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1437 /* Like `STORE_JUMP', but for inserting. Assume `b' is the buffer end. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1438 #define INSERT_JUMP(op, loc, to) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1439 insert_op1 (op, loc, (to) - (loc) - 3, b)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1440
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1441 /* Like `STORE_JUMP2', but for inserting. Assume `b' is the buffer end. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1442 #define INSERT_JUMP2(op, loc, to, arg) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1443 insert_op2 (op, loc, (to) - (loc) - 3, arg, b)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1444
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1445
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1446 /* This is not an arbitrary limit: the arguments which represent offsets
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1447 into the pattern are two bytes long. So if 2^16 bytes turns out to
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1448 be too small, many things would have to change. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1449 #define MAX_BUF_SIZE (1L << 16)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1450
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1451
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1452 /* Extend the buffer by twice its current size via realloc and
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1453 reset the pointers that pointed into the old block to point to the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1454 correct places in the new one. If extending the buffer results in it
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1455 being larger than MAX_BUF_SIZE, then flag memory exhausted. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1456 #define EXTEND_BUFFER() \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1457 do { \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1458 unsigned char *old_buffer = bufp->buffer; \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1459 if (bufp->allocated == MAX_BUF_SIZE) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1460 return REG_ESIZE; \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1461 bufp->allocated <<= 1; \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1462 if (bufp->allocated > MAX_BUF_SIZE) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1463 bufp->allocated = MAX_BUF_SIZE; \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1464 bufp->buffer = (unsigned char *) realloc (bufp->buffer, bufp->allocated);\
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1465 if (bufp->buffer == NULL) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1466 return REG_ESPACE; \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1467 /* If the buffer moved, move all the pointers into it. */ \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1468 if (old_buffer != bufp->buffer) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1469 { \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1470 b = (b - old_buffer) + bufp->buffer; \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1471 begalt = (begalt - old_buffer) + bufp->buffer; \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1472 if (fixup_alt_jump) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1473 fixup_alt_jump = (fixup_alt_jump - old_buffer) + bufp->buffer;\
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1474 if (laststart) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1475 laststart = (laststart - old_buffer) + bufp->buffer; \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1476 if (pending_exact) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1477 pending_exact = (pending_exact - old_buffer) + bufp->buffer; \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1478 } \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1479 } while (0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1480
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1481
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1482 /* Since we have one byte reserved for the register number argument to
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1483 {start,stop}_memory, the maximum number of groups we can report
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1484 things about is what fits in that byte. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1485 #define MAX_REGNUM 255
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1486
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1487 /* But patterns can have more than `MAX_REGNUM' registers. We just
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1488 ignore the excess. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1489 typedef unsigned regnum_t;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1490
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1491
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1492 /* Macros for the compile stack. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1493
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1494 /* Since offsets can go either forwards or backwards, this type needs to
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1495 be able to hold values from -(MAX_BUF_SIZE - 1) to MAX_BUF_SIZE - 1. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1496 typedef int pattern_offset_t;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1497
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1498 typedef struct
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1499 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1500 pattern_offset_t begalt_offset;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1501 pattern_offset_t fixup_alt_jump;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1502 pattern_offset_t inner_group_offset;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1503 pattern_offset_t laststart_offset;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1504 regnum_t regnum;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1505 } compile_stack_elt_t;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1506
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1507
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1508 typedef struct
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1509 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1510 compile_stack_elt_t *stack;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1511 unsigned size;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1512 unsigned avail; /* Offset of next open position. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1513 } compile_stack_type;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1514
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1515
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1516 #define INIT_COMPILE_STACK_SIZE 32
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1517
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1518 #define COMPILE_STACK_EMPTY (compile_stack.avail == 0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1519 #define COMPILE_STACK_FULL (compile_stack.avail == compile_stack.size)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1520
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1521 /* The next available element. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1522 #define COMPILE_STACK_TOP (compile_stack.stack[compile_stack.avail])
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1523
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1524
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1525 /* Set the bit for character C in a list. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1526 #define SET_LIST_BIT(c) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1527 (b[((unsigned char) (c)) / BYTEWIDTH] \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1528 |= 1 << (((unsigned char) c) % BYTEWIDTH))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1529
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1530
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1531 /* Get the next unsigned number in the uncompiled pattern. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1532 #define GET_UNSIGNED_NUMBER(num) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1533 { if (p != pend) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1534 { \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1535 PATFETCH (c); \
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
1536 while (ISDIGIT (c)) \
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1537 { \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1538 if (num < 0) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1539 num = 0; \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1540 num = num * 10 + c - '0'; \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1541 if (p == pend) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1542 break; \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1543 PATFETCH (c); \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1544 } \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1545 } \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1546 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1547
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1548 #define CHAR_CLASS_MAX_LENGTH 6 /* Namely, `xdigit'. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1549
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1550 #define IS_CHAR_CLASS(string) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1551 (STREQ (string, "alpha") || STREQ (string, "upper") \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1552 || STREQ (string, "lower") || STREQ (string, "digit") \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1553 || STREQ (string, "alnum") || STREQ (string, "xdigit") \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1554 || STREQ (string, "space") || STREQ (string, "print") \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1555 || STREQ (string, "punct") || STREQ (string, "graph") \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1556 || STREQ (string, "cntrl") || STREQ (string, "blank"))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1557
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1558 #ifndef MATCH_MAY_ALLOCATE
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1559
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1560 /* If we cannot allocate large objects within re_match_2_internal,
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1561 we make the fail stack and register vectors global.
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1562 The fail stack, we grow to the maximum size when a regexp
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1563 is compiled.
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1564 The register vectors, we adjust in size each time we
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1565 compile a regexp, according to the number of registers it needs. */
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1566
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1567 static fail_stack_type fail_stack;
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1568
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1569 /* Size with which the following vectors are currently allocated.
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1570 That is so we can make them bigger as needed,
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1571 but never make them smaller. */
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1572 static int regs_allocated_size;
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1573
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1574 static const char ** regstart, ** regend;
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1575 static const char ** old_regstart, ** old_regend;
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1576 static const char **best_regstart, **best_regend;
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1577 static register_info_type *reg_info;
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1578 static const char **reg_dummy;
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1579 static register_info_type *reg_info_dummy;
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1580
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1581 /* Make the register vectors big enough for NUM_REGS registers,
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1582 but don't make them smaller. */
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1583
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1584 static
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1585 regex_grow_registers (num_regs)
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1586 int num_regs;
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1587 {
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1588 if (num_regs > regs_allocated_size)
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1589 {
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1590 RETALLOC_IF (regstart, num_regs, const char *);
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1591 RETALLOC_IF (regend, num_regs, const char *);
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1592 RETALLOC_IF (old_regstart, num_regs, const char *);
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1593 RETALLOC_IF (old_regend, num_regs, const char *);
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1594 RETALLOC_IF (best_regstart, num_regs, const char *);
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1595 RETALLOC_IF (best_regend, num_regs, const char *);
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1596 RETALLOC_IF (reg_info, num_regs, register_info_type);
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1597 RETALLOC_IF (reg_dummy, num_regs, const char *);
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1598 RETALLOC_IF (reg_info_dummy, num_regs, register_info_type);
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1599
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1600 regs_allocated_size = num_regs;
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1601 }
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1602 }
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1603
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1604 #endif /* not MATCH_MAY_ALLOCATE */
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
1605
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1606 /* `regex_compile' compiles PATTERN (of length SIZE) according to SYNTAX.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1607 Returns one of error codes defined in `regex.h', or zero for success.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1608
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1609 Assumes the `allocated' (and perhaps `buffer') and `translate'
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1610 fields are set in BUFP on entry.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1611
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1612 If it succeeds, results are put in BUFP (if it returns an error, the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1613 contents of BUFP are undefined):
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1614 `buffer' is the compiled pattern;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1615 `syntax' is set to SYNTAX;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1616 `used' is set to the length of the compiled pattern;
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
1617 `fastmap_accurate' is zero;
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
1618 `re_nsub' is the number of subexpressions in PATTERN;
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
1619 `not_bol' and `not_eol' are zero;
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1620
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1621 The `fastmap' and `newline_anchor' fields are neither
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1622 examined nor set. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1623
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
1624 /* Return, freeing storage we allocated. */
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
1625 #define FREE_STACK_RETURN(value) \
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
1626 return (free (compile_stack.stack), value)
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
1627
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1628 static reg_errcode_t
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1629 regex_compile (pattern, size, syntax, bufp)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1630 const char *pattern;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1631 int size;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1632 reg_syntax_t syntax;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1633 struct re_pattern_buffer *bufp;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1634 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1635 /* We fetch characters from PATTERN here. Even though PATTERN is
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1636 `char *' (i.e., signed), we declare these variables as unsigned, so
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1637 they can be reliably used as array indices. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1638 register unsigned char c, c1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1639
198
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
1640 /* A random temporary spot in PATTERN. */
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1641 const char *p1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1642
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1643 /* Points to the end of the buffer, where we should append. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1644 register unsigned char *b;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1645
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1646 /* Keeps track of unclosed groups. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1647 compile_stack_type compile_stack;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1648
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1649 /* Points to the current (ending) position in the pattern. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1650 const char *p = pattern;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1651 const char *pend = pattern + size;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1652
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1653 /* How to translate the characters in the pattern. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1654 char *translate = bufp->translate;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1655
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1656 /* Address of the count-byte of the most recently inserted `exactn'
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1657 command. This makes it possible to tell if a new exact-match
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1658 character can be added to that command or if the character requires
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1659 a new `exactn' command. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1660 unsigned char *pending_exact = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1661
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1662 /* Address of start of the most recently finished expression.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1663 This tells, e.g., postfix * where to find the start of its
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1664 operand. Reset at the beginning of groups and alternatives. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1665 unsigned char *laststart = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1666
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1667 /* Address of beginning of regexp, or inside of last group. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1668 unsigned char *begalt;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1669
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1670 /* Place in the uncompiled pattern (i.e., the {) to
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1671 which to go back if the interval is invalid. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1672 const char *beg_interval;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1673
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1674 /* Address of the place where a forward jump should go to the end of
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1675 the containing expression. Each alternative of an `or' -- except the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1676 last -- ends with a forward jump of this sort. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1677 unsigned char *fixup_alt_jump = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1678
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1679 /* Counts open-groups as they are encountered. Remembered for the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1680 matching close-group on the compile stack, so the same register
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1681 number is put in the stop_memory as the start_memory. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1682 regnum_t regnum = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1683
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1684 #ifdef DEBUG
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1685 DEBUG_PRINT1 ("\nCompiling pattern: ");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1686 if (debug)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1687 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1688 unsigned debug_count;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1689
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1690 for (debug_count = 0; debug_count < size; debug_count++)
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
1691 putchar (pattern[debug_count]);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1692 putchar ('\n');
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1693 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1694 #endif /* DEBUG */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1695
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1696 /* Initialize the compile stack. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1697 compile_stack.stack = TALLOC (INIT_COMPILE_STACK_SIZE, compile_stack_elt_t);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1698 if (compile_stack.stack == NULL)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1699 return REG_ESPACE;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1700
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1701 compile_stack.size = INIT_COMPILE_STACK_SIZE;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1702 compile_stack.avail = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1703
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1704 /* Initialize the pattern buffer. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1705 bufp->syntax = syntax;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1706 bufp->fastmap_accurate = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1707 bufp->not_bol = bufp->not_eol = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1708
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1709 /* Set `used' to zero, so that if we return an error, the pattern
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1710 printer (for debugging) will think there's no pattern. We reset it
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1711 at the end. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1712 bufp->used = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1713
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1714 /* Always count groups, whether or not bufp->no_sub is set. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1715 bufp->re_nsub = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1716
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1717 #if !defined (emacs) && !defined (SYNTAX_TABLE)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1718 /* Initialize the syntax table. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1719 init_syntax_once ();
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1720 #endif
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1721
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1722 if (bufp->allocated == 0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1723 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1724 if (bufp->buffer)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1725 { /* If zero allocated, but buffer is non-null, try to realloc
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1726 enough space. This loses if buffer's address is bogus, but
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1727 that is the user's responsibility. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1728 RETALLOC (bufp->buffer, INIT_BUF_SIZE, unsigned char);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1729 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1730 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1731 { /* Caller did not allocate a buffer. Do it for them. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1732 bufp->buffer = TALLOC (INIT_BUF_SIZE, unsigned char);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1733 }
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
1734 if (!bufp->buffer) FREE_STACK_RETURN (REG_ESPACE);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1735
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1736 bufp->allocated = INIT_BUF_SIZE;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1737 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1738
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1739 begalt = b = bufp->buffer;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1740
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1741 /* Loop through the uncompiled pattern until we're at the end. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1742 while (p != pend)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1743 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1744 PATFETCH (c);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1745
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1746 switch (c)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1747 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1748 case '^':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1749 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1750 if ( /* If at start of pattern, it's an operator. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1751 p == pattern + 1
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1752 /* If context independent, it's an operator. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1753 || syntax & RE_CONTEXT_INDEP_ANCHORS
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1754 /* Otherwise, depends on what's come before. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1755 || at_begline_loc_p (pattern, p, syntax))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1756 BUF_PUSH (begline);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1757 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1758 goto normal_char;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1759 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1760 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1761
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1762
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1763 case '$':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1764 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1765 if ( /* If at end of pattern, it's an operator. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1766 p == pend
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1767 /* If context independent, it's an operator. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1768 || syntax & RE_CONTEXT_INDEP_ANCHORS
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1769 /* Otherwise, depends on what's next. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1770 || at_endline_loc_p (p, pend, syntax))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1771 BUF_PUSH (endline);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1772 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1773 goto normal_char;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1774 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1775 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1776
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1777
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1778 case '+':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1779 case '?':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1780 if ((syntax & RE_BK_PLUS_QM)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1781 || (syntax & RE_LIMITED_OPS))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1782 goto normal_char;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1783 handle_plus:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1784 case '*':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1785 /* If there is no previous pattern... */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1786 if (!laststart)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1787 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1788 if (syntax & RE_CONTEXT_INVALID_OPS)
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
1789 FREE_STACK_RETURN (REG_BADRPT);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1790 else if (!(syntax & RE_CONTEXT_INDEP_OPS))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1791 goto normal_char;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1792 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1793
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1794 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1795 /* Are we optimizing this jump? */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1796 boolean keep_string_p = false;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1797
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1798 /* 1 means zero (many) matches is allowed. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1799 char zero_times_ok = 0, many_times_ok = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1800
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1801 /* If there is a sequence of repetition chars, collapse it
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1802 down to just one (the right one). We can't combine
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1803 interval operators with these because of, e.g., `a{2}*',
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1804 which should only match an even number of `a's. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1805
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1806 for (;;)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1807 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1808 zero_times_ok |= c != '+';
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1809 many_times_ok |= c != '?';
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1810
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1811 if (p == pend)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1812 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1813
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1814 PATFETCH (c);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1815
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1816 if (c == '*'
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1817 || (!(syntax & RE_BK_PLUS_QM) && (c == '+' || c == '?')))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1818 ;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1819
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1820 else if (syntax & RE_BK_PLUS_QM && c == '\\')
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1821 {
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
1822 if (p == pend) FREE_STACK_RETURN (REG_EESCAPE);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1823
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1824 PATFETCH (c1);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1825 if (!(c1 == '+' || c1 == '?'))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1826 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1827 PATUNFETCH;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1828 PATUNFETCH;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1829 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1830 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1831
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1832 c = c1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1833 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1834 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1835 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1836 PATUNFETCH;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1837 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1838 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1839
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1840 /* If we get here, we found another repeat character. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1841 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1842
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1843 /* Star, etc. applied to an empty pattern is equivalent
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1844 to an empty pattern. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1845 if (!laststart)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1846 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1847
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1848 /* Now we know whether or not zero matches is allowed
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1849 and also whether or not two or more matches is allowed. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1850 if (many_times_ok)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1851 { /* More than one repetition is allowed, so put in at the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1852 end a backward relative jump from `b' to before the next
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1853 jump we're going to put in below (which jumps from
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1854 laststart to after this jump).
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1855
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1856 But if we are at the `*' in the exact sequence `.*\n',
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1857 insert an unconditional jump backwards to the .,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1858 instead of the beginning of the loop. This way we only
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1859 push a failure point once, instead of every time
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1860 through the loop. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1861 assert (p - 1 > pattern);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1862
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1863 /* Allocate the space for the jump. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1864 GET_BUFFER_SPACE (3);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1865
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1866 /* We know we are not at the first character of the pattern,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1867 because laststart was nonzero. And we've already
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1868 incremented `p', by the way, to be the character after
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1869 the `*'. Do we have to do something analogous here
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1870 for null bytes, because of RE_DOT_NOT_NULL? */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1871 if (TRANSLATE (*(p - 2)) == TRANSLATE ('.')
80
d689538c6d85 merge with 1.4.1
Jim Meyering <jim@meyering.net>
parents: 55
diff changeset
1872 && zero_times_ok
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1873 && p < pend && TRANSLATE (*p) == TRANSLATE ('\n')
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1874 && !(syntax & RE_DOT_NEWLINE))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1875 { /* We have .*\n. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1876 STORE_JUMP (jump, b, laststart);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1877 keep_string_p = true;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1878 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1879 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1880 /* Anything else. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1881 STORE_JUMP (maybe_pop_jump, b, laststart - 3);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1882
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1883 /* We've added more stuff to the buffer. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1884 b += 3;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1885 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1886
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1887 /* On failure, jump from laststart to b + 3, which will be the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1888 end of the buffer after this jump is inserted. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1889 GET_BUFFER_SPACE (3);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1890 INSERT_JUMP (keep_string_p ? on_failure_keep_string_jump
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1891 : on_failure_jump,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1892 laststart, b + 3);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1893 pending_exact = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1894 b += 3;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1895
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1896 if (!zero_times_ok)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1897 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1898 /* At least one repetition is required, so insert a
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1899 `dummy_failure_jump' before the initial
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1900 `on_failure_jump' instruction of the loop. This
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1901 effects a skip over that instruction the first time
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1902 we hit that loop. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1903 GET_BUFFER_SPACE (3);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1904 INSERT_JUMP (dummy_failure_jump, laststart, laststart + 6);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1905 b += 3;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1906 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1907 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1908 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1909
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1910
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1911 case '.':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1912 laststart = b;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1913 BUF_PUSH (anychar);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1914 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1915
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1916
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1917 case '[':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1918 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1919 boolean had_char_class = false;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1920
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
1921 if (p == pend) FREE_STACK_RETURN (REG_EBRACK);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1922
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1923 /* Ensure that we have enough space to push a charset: the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1924 opcode, the length count, and the bitset; 34 bytes in all. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1925 GET_BUFFER_SPACE (34);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1926
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1927 laststart = b;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1928
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1929 /* We test `*p == '^' twice, instead of using an if
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1930 statement, so we only need one BUF_PUSH. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1931 BUF_PUSH (*p == '^' ? charset_not : charset);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1932 if (*p == '^')
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1933 p++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1934
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1935 /* Remember the first position in the bracket expression. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1936 p1 = p;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1937
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1938 /* Push the number of bytes in the bitmap. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1939 BUF_PUSH ((1 << BYTEWIDTH) / BYTEWIDTH);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1940
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1941 /* Clear the whole map. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1942 bzero (b, (1 << BYTEWIDTH) / BYTEWIDTH);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1943
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1944 /* charset_not matches newline according to a syntax bit. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1945 if ((re_opcode_t) b[-2] == charset_not
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1946 && (syntax & RE_HAT_LISTS_NOT_NEWLINE))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1947 SET_LIST_BIT ('\n');
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1948
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1949 /* Read in characters and ranges, setting map bits. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1950 for (;;)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1951 {
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
1952 if (p == pend) FREE_STACK_RETURN (REG_EBRACK);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1953
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1954 PATFETCH (c);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1955
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1956 /* \ might escape characters inside [...] and [^...]. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1957 if ((syntax & RE_BACKSLASH_ESCAPE_IN_LISTS) && c == '\\')
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1958 {
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
1959 if (p == pend) FREE_STACK_RETURN (REG_EESCAPE);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1960
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1961 PATFETCH (c1);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1962 SET_LIST_BIT (c1);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1963 continue;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1964 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1965
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1966 /* Could be the end of the bracket expression. If it's
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1967 not (i.e., when the bracket expression is `[]' so
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1968 far), the ']' character bit gets set way below. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1969 if (c == ']' && p != p1 + 1)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1970 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1971
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1972 /* Look ahead to see if it's a range when the last thing
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1973 was a character class. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1974 if (had_char_class && c == '-' && *p != ']')
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
1975 FREE_STACK_RETURN (REG_ERANGE);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1976
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1977 /* Look ahead to see if it's a range when the last thing
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1978 was a character: if this is a hyphen not at the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1979 beginning or the end of a list, then it's the range
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1980 operator. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1981 if (c == '-'
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1982 && !(p - 2 >= pattern && p[-2] == '[')
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1983 && !(p - 3 >= pattern && p[-3] == '[' && p[-2] == '^')
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1984 && *p != ']')
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1985 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1986 reg_errcode_t ret
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1987 = compile_range (&p, pend, translate, syntax, b);
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
1988 if (ret != REG_NOERROR) FREE_STACK_RETURN (ret);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1989 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1990
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1991 else if (p[0] == '-' && p[1] != ']')
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1992 { /* This handles ranges made up of characters only. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1993 reg_errcode_t ret;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1994
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1995 /* Move past the `-'. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1996 PATFETCH (c1);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1997
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1998 ret = compile_range (&p, pend, translate, syntax, b);
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
1999 if (ret != REG_NOERROR) FREE_STACK_RETURN (ret);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2000 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2001
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2002 /* See if we're at the beginning of a possible character
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2003 class. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2004
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2005 else if (syntax & RE_CHAR_CLASSES && c == '[' && *p == ':')
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2006 { /* Leave room for the null. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2007 char str[CHAR_CLASS_MAX_LENGTH + 1];
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2008
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2009 PATFETCH (c);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2010 c1 = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2011
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2012 /* If pattern is `[[:'. */
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2013 if (p == pend) FREE_STACK_RETURN (REG_EBRACK);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2014
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2015 for (;;)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2016 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2017 PATFETCH (c);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2018 if (c == ':' || c == ']' || p == pend
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2019 || c1 == CHAR_CLASS_MAX_LENGTH)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2020 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2021 str[c1++] = c;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2022 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2023 str[c1] = '\0';
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2024
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2025 /* If isn't a word bracketed by `[:' and:`]':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2026 undo the ending character, the letters, and leave
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2027 the leading `:' and `[' (but set bits for them). */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2028 if (c == ':' && *p == ']')
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2029 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2030 int ch;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2031 boolean is_alnum = STREQ (str, "alnum");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2032 boolean is_alpha = STREQ (str, "alpha");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2033 boolean is_blank = STREQ (str, "blank");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2034 boolean is_cntrl = STREQ (str, "cntrl");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2035 boolean is_digit = STREQ (str, "digit");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2036 boolean is_graph = STREQ (str, "graph");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2037 boolean is_lower = STREQ (str, "lower");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2038 boolean is_print = STREQ (str, "print");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2039 boolean is_punct = STREQ (str, "punct");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2040 boolean is_space = STREQ (str, "space");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2041 boolean is_upper = STREQ (str, "upper");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2042 boolean is_xdigit = STREQ (str, "xdigit");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2043
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2044 if (!IS_CHAR_CLASS (str))
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2045 FREE_STACK_RETURN (REG_ECTYPE);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2046
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2047 /* Throw away the ] at the end of the character
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2048 class. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2049 PATFETCH (c);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2050
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2051 if (p == pend) FREE_STACK_RETURN (REG_EBRACK);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2052
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2053 for (ch = 0; ch < 1 << BYTEWIDTH; ch++)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2054 {
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2055 /* This was split into 3 if's to
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2056 avoid an arbitrary limit in some compiler. */
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
2057 if ( (is_alnum && ISALNUM (ch))
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
2058 || (is_alpha && ISALPHA (ch))
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
2059 || (is_blank && ISBLANK (ch))
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2060 || (is_cntrl && ISCNTRL (ch)))
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2061 SET_LIST_BIT (ch);
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2062 if ( (is_digit && ISDIGIT (ch))
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
2063 || (is_graph && ISGRAPH (ch))
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
2064 || (is_lower && ISLOWER (ch))
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2065 || (is_print && ISPRINT (ch)))
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2066 SET_LIST_BIT (ch);
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2067 if ( (is_punct && ISPUNCT (ch))
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
2068 || (is_space && ISSPACE (ch))
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
2069 || (is_upper && ISUPPER (ch))
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
2070 || (is_xdigit && ISXDIGIT (ch)))
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2071 SET_LIST_BIT (ch);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2072 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2073 had_char_class = true;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2074 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2075 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2076 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2077 c1++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2078 while (c1--)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2079 PATUNFETCH;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2080 SET_LIST_BIT ('[');
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2081 SET_LIST_BIT (':');
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2082 had_char_class = false;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2083 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2084 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2085 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2086 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2087 had_char_class = false;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2088 SET_LIST_BIT (c);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2089 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2090 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2091
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2092 /* Discard any (non)matching list bytes that are all 0 at the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2093 end of the map. Decrease the map-length byte too. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2094 while ((int) b[-1] > 0 && b[b[-1] - 1] == 0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2095 b[-1]--;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2096 b += b[-1];
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2097 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2098 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2099
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2100
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2101 case '(':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2102 if (syntax & RE_NO_BK_PARENS)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2103 goto handle_open;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2104 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2105 goto normal_char;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2106
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2107
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2108 case ')':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2109 if (syntax & RE_NO_BK_PARENS)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2110 goto handle_close;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2111 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2112 goto normal_char;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2113
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2114
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2115 case '\n':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2116 if (syntax & RE_NEWLINE_ALT)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2117 goto handle_alt;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2118 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2119 goto normal_char;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2120
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2121
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2122 case '|':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2123 if (syntax & RE_NO_BK_VBAR)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2124 goto handle_alt;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2125 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2126 goto normal_char;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2127
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2128
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2129 case '{':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2130 if (syntax & RE_INTERVALS && syntax & RE_NO_BK_BRACES)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2131 goto handle_interval;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2132 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2133 goto normal_char;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2134
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2135
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2136 case '\\':
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2137 if (p == pend) FREE_STACK_RETURN (REG_EESCAPE);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2138
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2139 /* Do not translate the character after the \, so that we can
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2140 distinguish, e.g., \B from \b, even if we normally would
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2141 translate, e.g., B to b. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2142 PATFETCH_RAW (c);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2143
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2144 switch (c)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2145 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2146 case '(':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2147 if (syntax & RE_NO_BK_PARENS)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2148 goto normal_backslash;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2149
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2150 handle_open:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2151 bufp->re_nsub++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2152 regnum++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2153
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2154 if (COMPILE_STACK_FULL)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2155 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2156 RETALLOC (compile_stack.stack, compile_stack.size << 1,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2157 compile_stack_elt_t);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2158 if (compile_stack.stack == NULL) return REG_ESPACE;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2159
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2160 compile_stack.size <<= 1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2161 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2162
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2163 /* These are the values to restore when we hit end of this
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2164 group. They are all relative offsets, so that if the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2165 whole pattern moves because of realloc, they will still
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2166 be valid. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2167 COMPILE_STACK_TOP.begalt_offset = begalt - bufp->buffer;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2168 COMPILE_STACK_TOP.fixup_alt_jump
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2169 = fixup_alt_jump ? fixup_alt_jump - bufp->buffer + 1 : 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2170 COMPILE_STACK_TOP.laststart_offset = b - bufp->buffer;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2171 COMPILE_STACK_TOP.regnum = regnum;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2172
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2173 /* We will eventually replace the 0 with the number of
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2174 groups inner to this one. But do not push a
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2175 start_memory for groups beyond the last one we can
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2176 represent in the compiled pattern. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2177 if (regnum <= MAX_REGNUM)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2178 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2179 COMPILE_STACK_TOP.inner_group_offset = b - bufp->buffer + 2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2180 BUF_PUSH_3 (start_memory, regnum, 0);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2181 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2182
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2183 compile_stack.avail++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2184
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2185 fixup_alt_jump = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2186 laststart = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2187 begalt = b;
80
d689538c6d85 merge with 1.4.1
Jim Meyering <jim@meyering.net>
parents: 55
diff changeset
2188 /* If we've reached MAX_REGNUM groups, then this open
d689538c6d85 merge with 1.4.1
Jim Meyering <jim@meyering.net>
parents: 55
diff changeset
2189 won't actually generate any code, so we'll have to
d689538c6d85 merge with 1.4.1
Jim Meyering <jim@meyering.net>
parents: 55
diff changeset
2190 clear pending_exact explicitly. */
d689538c6d85 merge with 1.4.1
Jim Meyering <jim@meyering.net>
parents: 55
diff changeset
2191 pending_exact = 0;
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2192 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2193
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2194
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2195 case ')':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2196 if (syntax & RE_NO_BK_PARENS) goto normal_backslash;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2197
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2198 if (COMPILE_STACK_EMPTY)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2199 if (syntax & RE_UNMATCHED_RIGHT_PAREN_ORD)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2200 goto normal_backslash;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2201 else
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2202 FREE_STACK_RETURN (REG_ERPAREN);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2203
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2204 handle_close:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2205 if (fixup_alt_jump)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2206 { /* Push a dummy failure point at the end of the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2207 alternative for a possible future
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2208 `pop_failure_jump' to pop. See comments at
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2209 `push_dummy_failure' in `re_match_2'. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2210 BUF_PUSH (push_dummy_failure);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2211
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2212 /* We allocated space for this jump when we assigned
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2213 to `fixup_alt_jump', in the `handle_alt' case below. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2214 STORE_JUMP (jump_past_alt, fixup_alt_jump, b - 1);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2215 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2216
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2217 /* See similar code for backslashed left paren above. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2218 if (COMPILE_STACK_EMPTY)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2219 if (syntax & RE_UNMATCHED_RIGHT_PAREN_ORD)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2220 goto normal_char;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2221 else
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2222 FREE_STACK_RETURN (REG_ERPAREN);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2223
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2224 /* Since we just checked for an empty stack above, this
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2225 ``can't happen''. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2226 assert (compile_stack.avail != 0);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2227 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2228 /* We don't just want to restore into `regnum', because
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2229 later groups should continue to be numbered higher,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2230 as in `(ab)c(de)' -- the second group is #2. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2231 regnum_t this_group_regnum;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2232
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2233 compile_stack.avail--;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2234 begalt = bufp->buffer + COMPILE_STACK_TOP.begalt_offset;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2235 fixup_alt_jump
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2236 = COMPILE_STACK_TOP.fixup_alt_jump
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2237 ? bufp->buffer + COMPILE_STACK_TOP.fixup_alt_jump - 1
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2238 : 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2239 laststart = bufp->buffer + COMPILE_STACK_TOP.laststart_offset;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2240 this_group_regnum = COMPILE_STACK_TOP.regnum;
80
d689538c6d85 merge with 1.4.1
Jim Meyering <jim@meyering.net>
parents: 55
diff changeset
2241 /* If we've reached MAX_REGNUM groups, then this open
d689538c6d85 merge with 1.4.1
Jim Meyering <jim@meyering.net>
parents: 55
diff changeset
2242 won't actually generate any code, so we'll have to
d689538c6d85 merge with 1.4.1
Jim Meyering <jim@meyering.net>
parents: 55
diff changeset
2243 clear pending_exact explicitly. */
d689538c6d85 merge with 1.4.1
Jim Meyering <jim@meyering.net>
parents: 55
diff changeset
2244 pending_exact = 0;
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2245
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2246 /* We're at the end of the group, so now we know how many
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2247 groups were inside this one. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2248 if (this_group_regnum <= MAX_REGNUM)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2249 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2250 unsigned char *inner_group_loc
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2251 = bufp->buffer + COMPILE_STACK_TOP.inner_group_offset;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2252
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2253 *inner_group_loc = regnum - this_group_regnum;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2254 BUF_PUSH_3 (stop_memory, this_group_regnum,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2255 regnum - this_group_regnum);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2256 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2257 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2258 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2259
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2260
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2261 case '|': /* `\|'. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2262 if (syntax & RE_LIMITED_OPS || syntax & RE_NO_BK_VBAR)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2263 goto normal_backslash;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2264 handle_alt:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2265 if (syntax & RE_LIMITED_OPS)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2266 goto normal_char;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2267
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2268 /* Insert before the previous alternative a jump which
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2269 jumps to this alternative if the former fails. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2270 GET_BUFFER_SPACE (3);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2271 INSERT_JUMP (on_failure_jump, begalt, b + 6);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2272 pending_exact = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2273 b += 3;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2274
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2275 /* The alternative before this one has a jump after it
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2276 which gets executed if it gets matched. Adjust that
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2277 jump so it will jump to this alternative's analogous
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2278 jump (put in below, which in turn will jump to the next
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2279 (if any) alternative's such jump, etc.). The last such
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2280 jump jumps to the correct final destination. A picture:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2281 _____ _____
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2282 | | | |
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2283 | v | v
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2284 a | b | c
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2285
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
2286 If we are at `b', then fixup_alt_jump right now points to a
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
2287 three-byte space after `a'. We'll put in the jump, set
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
2288 fixup_alt_jump to right after `b', and leave behind three
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
2289 bytes which we'll fill in when we get to after `c'. */
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2290
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2291 if (fixup_alt_jump)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2292 STORE_JUMP (jump_past_alt, fixup_alt_jump, b);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2293
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2294 /* Mark and leave space for a jump after this alternative,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2295 to be filled in later either by next alternative or
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2296 when know we're at the end of a series of alternatives. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2297 fixup_alt_jump = b;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2298 GET_BUFFER_SPACE (3);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2299 b += 3;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2300
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2301 laststart = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2302 begalt = b;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2303 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2304
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2305
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2306 case '{':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2307 /* If \{ is a literal. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2308 if (!(syntax & RE_INTERVALS)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2309 /* If we're at `\{' and it's not the open-interval
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2310 operator. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2311 || ((syntax & RE_INTERVALS) && (syntax & RE_NO_BK_BRACES))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2312 || (p - 2 == pattern && p == pend))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2313 goto normal_backslash;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2314
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2315 handle_interval:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2316 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2317 /* If got here, then the syntax allows intervals. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2318
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2319 /* At least (most) this many matches must be made. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2320 int lower_bound = -1, upper_bound = -1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2321
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2322 beg_interval = p - 1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2323
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2324 if (p == pend)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2325 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2326 if (syntax & RE_NO_BK_BRACES)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2327 goto unfetch_interval;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2328 else
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2329 FREE_STACK_RETURN (REG_EBRACE);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2330 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2331
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2332 GET_UNSIGNED_NUMBER (lower_bound);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2333
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2334 if (c == ',')
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2335 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2336 GET_UNSIGNED_NUMBER (upper_bound);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2337 if (upper_bound < 0) upper_bound = RE_DUP_MAX;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2338 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2339 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2340 /* Interval such as `{1}' => match exactly once. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2341 upper_bound = lower_bound;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2342
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2343 if (lower_bound < 0 || upper_bound > RE_DUP_MAX
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2344 || lower_bound > upper_bound)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2345 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2346 if (syntax & RE_NO_BK_BRACES)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2347 goto unfetch_interval;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2348 else
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2349 FREE_STACK_RETURN (REG_BADBR);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2350 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2351
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2352 if (!(syntax & RE_NO_BK_BRACES))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2353 {
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2354 if (c != '\\') FREE_STACK_RETURN (REG_EBRACE);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2355
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2356 PATFETCH (c);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2357 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2358
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2359 if (c != '}')
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2360 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2361 if (syntax & RE_NO_BK_BRACES)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2362 goto unfetch_interval;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2363 else
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2364 FREE_STACK_RETURN (REG_BADBR);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2365 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2366
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2367 /* We just parsed a valid interval. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2368
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2369 /* If it's invalid to have no preceding re. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2370 if (!laststart)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2371 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2372 if (syntax & RE_CONTEXT_INVALID_OPS)
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2373 FREE_STACK_RETURN (REG_BADRPT);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2374 else if (syntax & RE_CONTEXT_INDEP_OPS)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2375 laststart = b;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2376 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2377 goto unfetch_interval;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2378 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2379
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2380 /* If the upper bound is zero, don't want to succeed at
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2381 all; jump from `laststart' to `b + 3', which will be
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2382 the end of the buffer after we insert the jump. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2383 if (upper_bound == 0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2384 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2385 GET_BUFFER_SPACE (3);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2386 INSERT_JUMP (jump, laststart, b + 3);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2387 b += 3;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2388 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2389
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2390 /* Otherwise, we have a nontrivial interval. When
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2391 we're all done, the pattern will look like:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2392 set_number_at <jump count> <upper bound>
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2393 set_number_at <succeed_n count> <lower bound>
198
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
2394 succeed_n <after jump addr> <succeed_n count>
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2395 <body of loop>
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2396 jump_n <succeed_n addr> <jump count>
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2397 (The upper bound and `jump_n' are omitted if
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2398 `upper_bound' is 1, though.) */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2399 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2400 { /* If the upper bound is > 1, we need to insert
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2401 more at the end of the loop. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2402 unsigned nbytes = 10 + (upper_bound > 1) * 10;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2403
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2404 GET_BUFFER_SPACE (nbytes);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2405
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2406 /* Initialize lower bound of the `succeed_n', even
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2407 though it will be set during matching by its
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2408 attendant `set_number_at' (inserted next),
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2409 because `re_compile_fastmap' needs to know.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2410 Jump to the `jump_n' we might insert below. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2411 INSERT_JUMP2 (succeed_n, laststart,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2412 b + 5 + (upper_bound > 1) * 5,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2413 lower_bound);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2414 b += 5;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2415
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2416 /* Code to initialize the lower bound. Insert
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2417 before the `succeed_n'. The `5' is the last two
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2418 bytes of this `set_number_at', plus 3 bytes of
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2419 the following `succeed_n'. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2420 insert_op2 (set_number_at, laststart, 5, lower_bound, b);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2421 b += 5;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2422
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2423 if (upper_bound > 1)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2424 { /* More than one repetition is allowed, so
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2425 append a backward jump to the `succeed_n'
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2426 that starts this interval.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2427
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2428 When we've reached this during matching,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2429 we'll have matched the interval once, so
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2430 jump back only `upper_bound - 1' times. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2431 STORE_JUMP2 (jump_n, b, laststart + 5,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2432 upper_bound - 1);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2433 b += 5;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2434
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2435 /* The location we want to set is the second
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2436 parameter of the `jump_n'; that is `b-2' as
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2437 an absolute address. `laststart' will be
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2438 the `set_number_at' we're about to insert;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2439 `laststart+3' the number to set, the source
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2440 for the relative address. But we are
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2441 inserting into the middle of the pattern --
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2442 so everything is getting moved up by 5.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2443 Conclusion: (b - 2) - (laststart + 3) + 5,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2444 i.e., b - laststart.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2445
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2446 We insert this at the beginning of the loop
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2447 so that if we fail during matching, we'll
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2448 reinitialize the bounds. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2449 insert_op2 (set_number_at, laststart, b - laststart,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2450 upper_bound - 1, b);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2451 b += 5;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2452 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2453 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2454 pending_exact = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2455 beg_interval = NULL;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2456 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2457 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2458
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2459 unfetch_interval:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2460 /* If an invalid interval, match the characters as literals. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2461 assert (beg_interval);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2462 p = beg_interval;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2463 beg_interval = NULL;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2464
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2465 /* normal_char and normal_backslash need `c'. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2466 PATFETCH (c);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2467
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2468 if (!(syntax & RE_NO_BK_BRACES))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2469 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2470 if (p > pattern && p[-1] == '\\')
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2471 goto normal_backslash;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2472 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2473 goto normal_char;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2474
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2475 #ifdef emacs
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2476 /* There is no way to specify the before_dot and after_dot
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2477 operators. rms says this is ok. --karl */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2478 case '=':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2479 BUF_PUSH (at_dot);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2480 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2481
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2482 case 's':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2483 laststart = b;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2484 PATFETCH (c);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2485 BUF_PUSH_2 (syntaxspec, syntax_spec_code[c]);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2486 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2487
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2488 case 'S':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2489 laststart = b;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2490 PATFETCH (c);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2491 BUF_PUSH_2 (notsyntaxspec, syntax_spec_code[c]);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2492 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2493 #endif /* emacs */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2494
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2495
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2496 case 'w':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2497 laststart = b;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2498 BUF_PUSH (wordchar);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2499 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2500
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2501
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2502 case 'W':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2503 laststart = b;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2504 BUF_PUSH (notwordchar);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2505 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2506
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2507
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2508 case '<':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2509 BUF_PUSH (wordbeg);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2510 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2511
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2512 case '>':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2513 BUF_PUSH (wordend);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2514 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2515
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2516 case 'b':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2517 BUF_PUSH (wordbound);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2518 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2519
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2520 case 'B':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2521 BUF_PUSH (notwordbound);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2522 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2523
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2524 case '`':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2525 BUF_PUSH (begbuf);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2526 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2527
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2528 case '\'':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2529 BUF_PUSH (endbuf);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2530 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2531
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2532 case '1': case '2': case '3': case '4': case '5':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2533 case '6': case '7': case '8': case '9':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2534 if (syntax & RE_NO_BK_REFS)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2535 goto normal_char;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2536
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2537 c1 = c - '0';
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2538
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2539 if (c1 > regnum)
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2540 FREE_STACK_RETURN (REG_ESUBREG);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2541
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2542 /* Can't back reference to a subexpression if inside of it. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2543 if (group_in_compile_stack (compile_stack, c1))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2544 goto normal_char;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2545
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2546 laststart = b;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2547 BUF_PUSH_2 (duplicate, c1);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2548 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2549
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2550
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2551 case '+':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2552 case '?':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2553 if (syntax & RE_BK_PLUS_QM)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2554 goto handle_plus;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2555 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2556 goto normal_backslash;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2557
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2558 default:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2559 normal_backslash:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2560 /* You might think it would be useful for \ to mean
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2561 not to translate; but if we don't translate it
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2562 it will never match anything. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2563 c = TRANSLATE (c);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2564 goto normal_char;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2565 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2566 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2567
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2568
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2569 default:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2570 /* Expects the character in `c'. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2571 normal_char:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2572 /* If no exactn currently being built. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2573 if (!pending_exact
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2574
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2575 /* If last exactn not at current position. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2576 || pending_exact + *pending_exact + 1 != b
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2577
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2578 /* We have only one byte following the exactn for the count. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2579 || *pending_exact == (1 << BYTEWIDTH) - 1
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2580
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2581 /* If followed by a repetition operator. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2582 || *p == '*' || *p == '^'
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2583 || ((syntax & RE_BK_PLUS_QM)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2584 ? *p == '\\' && (p[1] == '+' || p[1] == '?')
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2585 : (*p == '+' || *p == '?'))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2586 || ((syntax & RE_INTERVALS)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2587 && ((syntax & RE_NO_BK_BRACES)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2588 ? *p == '{'
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2589 : (p[0] == '\\' && p[1] == '{'))))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2590 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2591 /* Start building a new exactn. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2592
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2593 laststart = b;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2594
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2595 BUF_PUSH_2 (exactn, 0);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2596 pending_exact = b - 1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2597 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2598
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2599 BUF_PUSH (c);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2600 (*pending_exact)++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2601 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2602 } /* switch (c) */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2603 } /* while p != pend */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2604
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2605
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2606 /* Through the pattern now. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2607
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2608 if (fixup_alt_jump)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2609 STORE_JUMP (jump_past_alt, fixup_alt_jump, b);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2610
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2611 if (!COMPILE_STACK_EMPTY)
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2612 FREE_STACK_RETURN (REG_EPAREN);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2613
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
2614 /* If we don't want backtracking, force success
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
2615 the first time we reach the end of the compiled pattern. */
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
2616 if (syntax & RE_NO_POSIX_BACKTRACKING)
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
2617 BUF_PUSH (succeed);
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
2618
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2619 free (compile_stack.stack);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2620
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2621 /* We have succeeded; set the length of the buffer. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2622 bufp->used = b - bufp->buffer;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2623
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2624 #ifdef DEBUG
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2625 if (debug)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2626 {
81
8bc040c4fa94 merge with 1.4.2.
Jim Meyering <jim@meyering.net>
parents: 80
diff changeset
2627 DEBUG_PRINT1 ("\nCompiled pattern: \n");
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2628 print_compiled_pattern (bufp);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2629 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2630 #endif /* DEBUG */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2631
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
2632 #ifndef MATCH_MAY_ALLOCATE
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
2633 /* Initialize the failure stack to the largest possible stack. This
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
2634 isn't necessary unless we're trying to avoid calling alloca in
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
2635 the search and match routines. */
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
2636 {
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
2637 int num_regs = bufp->re_nsub + 1;
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
2638
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
2639 /* Since DOUBLE_FAIL_STACK refuses to double only if the current size
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
2640 is strictly greater than re_max_failures, the largest possible stack
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
2641 is 2 * re_max_failures failure points. */
217
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
2642 if (fail_stack.size < (2 * re_max_failures * MAX_FAILURE_ITEMS))
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
2643 {
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
2644 fail_stack.size = (2 * re_max_failures * MAX_FAILURE_ITEMS);
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
2645
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
2646 #ifdef emacs
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
2647 if (! fail_stack.stack)
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
2648 fail_stack.stack
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
2649 = (fail_stack_elt_t *) xmalloc (fail_stack.size
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
2650 * sizeof (fail_stack_elt_t));
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
2651 else
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
2652 fail_stack.stack
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
2653 = (fail_stack_elt_t *) xrealloc (fail_stack.stack,
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
2654 (fail_stack.size
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
2655 * sizeof (fail_stack_elt_t)));
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
2656 #else /* not emacs */
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
2657 if (! fail_stack.stack)
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
2658 fail_stack.stack
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
2659 = (fail_stack_elt_t *) malloc (fail_stack.size
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
2660 * sizeof (fail_stack_elt_t));
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
2661 else
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
2662 fail_stack.stack
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
2663 = (fail_stack_elt_t *) realloc (fail_stack.stack,
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
2664 (fail_stack.size
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
2665 * sizeof (fail_stack_elt_t)));
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
2666 #endif /* not emacs */
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
2667 }
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
2668
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
2669 regex_grow_registers (num_regs);
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
2670 }
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
2671 #endif /* not MATCH_MAY_ALLOCATE */
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
2672
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2673 return REG_NOERROR;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2674 } /* regex_compile */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2675
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2676 /* Subroutines for `regex_compile'. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2677
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2678 /* Store OP at LOC followed by two-byte integer parameter ARG. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2679
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2680 static void
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2681 store_op1 (op, loc, arg)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2682 re_opcode_t op;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2683 unsigned char *loc;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2684 int arg;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2685 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2686 *loc = (unsigned char) op;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2687 STORE_NUMBER (loc + 1, arg);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2688 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2689
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2690
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2691 /* Like `store_op1', but for two two-byte parameters ARG1 and ARG2. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2692
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2693 static void
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2694 store_op2 (op, loc, arg1, arg2)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2695 re_opcode_t op;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2696 unsigned char *loc;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2697 int arg1, arg2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2698 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2699 *loc = (unsigned char) op;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2700 STORE_NUMBER (loc + 1, arg1);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2701 STORE_NUMBER (loc + 3, arg2);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2702 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2703
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2704
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2705 /* Copy the bytes from LOC to END to open up three bytes of space at LOC
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2706 for OP followed by two-byte integer parameter ARG. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2707
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2708 static void
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2709 insert_op1 (op, loc, arg, end)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2710 re_opcode_t op;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2711 unsigned char *loc;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2712 int arg;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2713 unsigned char *end;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2714 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2715 register unsigned char *pfrom = end;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2716 register unsigned char *pto = end + 3;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2717
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2718 while (pfrom != loc)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2719 *--pto = *--pfrom;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2720
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2721 store_op1 (op, loc, arg);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2722 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2723
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2724
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2725 /* Like `insert_op1', but for two two-byte parameters ARG1 and ARG2. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2726
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2727 static void
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2728 insert_op2 (op, loc, arg1, arg2, end)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2729 re_opcode_t op;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2730 unsigned char *loc;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2731 int arg1, arg2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2732 unsigned char *end;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2733 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2734 register unsigned char *pfrom = end;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2735 register unsigned char *pto = end + 5;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2736
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2737 while (pfrom != loc)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2738 *--pto = *--pfrom;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2739
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2740 store_op2 (op, loc, arg1, arg2);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2741 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2742
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2743
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2744 /* P points to just after a ^ in PATTERN. Return true if that ^ comes
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2745 after an alternative or a begin-subexpression. We assume there is at
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2746 least one character before the ^. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2747
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2748 static boolean
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2749 at_begline_loc_p (pattern, p, syntax)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2750 const char *pattern, *p;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2751 reg_syntax_t syntax;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2752 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2753 const char *prev = p - 2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2754 boolean prev_prev_backslash = prev > pattern && prev[-1] == '\\';
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2755
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2756 return
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2757 /* After a subexpression? */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2758 (*prev == '(' && (syntax & RE_NO_BK_PARENS || prev_prev_backslash))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2759 /* After an alternative? */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2760 || (*prev == '|' && (syntax & RE_NO_BK_VBAR || prev_prev_backslash));
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2761 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2762
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2763
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2764 /* The dual of at_begline_loc_p. This one is for $. We assume there is
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2765 at least one character after the $, i.e., `P < PEND'. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2766
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2767 static boolean
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2768 at_endline_loc_p (p, pend, syntax)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2769 const char *p, *pend;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2770 int syntax;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2771 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2772 const char *next = p;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2773 boolean next_backslash = *next == '\\';
450
2c92405432fe merge with 1.11.5
Jim Meyering <jim@meyering.net>
parents: 448
diff changeset
2774 const char *next_next = p + 1 < pend ? p + 1 : 0;
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2775
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2776 return
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2777 /* Before a subexpression? */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2778 (syntax & RE_NO_BK_PARENS ? *next == ')'
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2779 : next_backslash && next_next && *next_next == ')')
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2780 /* Before an alternative? */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2781 || (syntax & RE_NO_BK_VBAR ? *next == '|'
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2782 : next_backslash && next_next && *next_next == '|');
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2783 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2784
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2785
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2786 /* Returns true if REGNUM is in one of COMPILE_STACK's elements and
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2787 false if it's not. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2788
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2789 static boolean
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2790 group_in_compile_stack (compile_stack, regnum)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2791 compile_stack_type compile_stack;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2792 regnum_t regnum;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2793 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2794 int this_element;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2795
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2796 for (this_element = compile_stack.avail - 1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2797 this_element >= 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2798 this_element--)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2799 if (compile_stack.stack[this_element].regnum == regnum)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2800 return true;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2801
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2802 return false;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2803 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2804
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2805
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2806 /* Read the ending character of a range (in a bracket expression) from the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2807 uncompiled pattern *P_PTR (which ends at PEND). We assume the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2808 starting character is in `P[-2]'. (`P[-1]' is the character `-'.)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2809 Then we set the translation of all bits between the starting and
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2810 ending characters (inclusive) in the compiled pattern B.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2811
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2812 Return an error code.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2813
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2814 We use these short variable names so we can use the same macros as
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2815 `regex_compile' itself. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2816
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2817 static reg_errcode_t
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2818 compile_range (p_ptr, pend, translate, syntax, b)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2819 const char **p_ptr, *pend;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2820 char *translate;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2821 reg_syntax_t syntax;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2822 unsigned char *b;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2823 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2824 unsigned this_char;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2825
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2826 const char *p = *p_ptr;
37
abf77aa551c0 merge with 1.4
Jim Meyering <jim@meyering.net>
parents: 30
diff changeset
2827 int range_start, range_end;
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2828
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2829 if (p == pend)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2830 return REG_ERANGE;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2831
37
abf77aa551c0 merge with 1.4
Jim Meyering <jim@meyering.net>
parents: 30
diff changeset
2832 /* Even though the pattern is a signed `char *', we need to fetch
abf77aa551c0 merge with 1.4
Jim Meyering <jim@meyering.net>
parents: 30
diff changeset
2833 with unsigned char *'s; if the high bit of the pattern character
abf77aa551c0 merge with 1.4
Jim Meyering <jim@meyering.net>
parents: 30
diff changeset
2834 is set, the range endpoints will be negative if we fetch using a
abf77aa551c0 merge with 1.4
Jim Meyering <jim@meyering.net>
parents: 30
diff changeset
2835 signed char *.
abf77aa551c0 merge with 1.4
Jim Meyering <jim@meyering.net>
parents: 30
diff changeset
2836
abf77aa551c0 merge with 1.4
Jim Meyering <jim@meyering.net>
parents: 30
diff changeset
2837 We also want to fetch the endpoints without translating them; the
abf77aa551c0 merge with 1.4
Jim Meyering <jim@meyering.net>
parents: 30
diff changeset
2838 appropriate translation is done in the bit-setting loop below. */
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2839 /* The SVR4 compiler on the 3B2 had trouble with unsigned const char *. */
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2840 range_start = ((const unsigned char *) p)[-2];
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2841 range_end = ((const unsigned char *) p)[0];
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2842
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2843 /* Have to increment the pointer into the pattern string, so the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2844 caller isn't still at the ending character. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2845 (*p_ptr)++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2846
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2847 /* If the start is after the end, the range is empty. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2848 if (range_start > range_end)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2849 return syntax & RE_NO_EMPTY_RANGES ? REG_ERANGE : REG_NOERROR;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2850
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2851 /* Here we see why `this_char' has to be larger than an `unsigned
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2852 char' -- the range is inclusive, so if `range_end' == 0xff
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2853 (assuming 8-bit characters), we would otherwise go into an infinite
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2854 loop, since all characters <= 0xff. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2855 for (this_char = range_start; this_char <= range_end; this_char++)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2856 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2857 SET_LIST_BIT (TRANSLATE (this_char));
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2858 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2859
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2860 return REG_NOERROR;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2861 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2862
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2863 /* re_compile_fastmap computes a ``fastmap'' for the compiled pattern in
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2864 BUFP. A fastmap records which of the (1 << BYTEWIDTH) possible
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2865 characters can start a string that matches the pattern. This fastmap
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2866 is used by re_search to skip quickly over impossible starting points.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2867
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2868 The caller must supply the address of a (1 << BYTEWIDTH)-byte data
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2869 area as BUFP->fastmap.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2870
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2871 We set the `fastmap', `fastmap_accurate', and `can_be_null' fields in
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2872 the pattern buffer.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2873
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2874 Returns 0 if we succeed, -2 if an internal error. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2875
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2876 int
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2877 re_compile_fastmap (bufp)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2878 struct re_pattern_buffer *bufp;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2879 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2880 int j, k;
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
2881 #ifdef MATCH_MAY_ALLOCATE
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2882 fail_stack_type fail_stack;
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
2883 #endif
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2884 #ifndef REGEX_MALLOC
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2885 char *destination;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2886 #endif
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2887 /* We don't push any register information onto the failure stack. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2888 unsigned num_regs = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2889
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2890 register char *fastmap = bufp->fastmap;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2891 unsigned char *pattern = bufp->buffer;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2892 unsigned long size = bufp->used;
170
31018ef0f0e8 merge with 1.9
Jim Meyering <jim@meyering.net>
parents: 127
diff changeset
2893 unsigned char *p = pattern;
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2894 register unsigned char *pend = pattern + size;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2895
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
2896 /* This holds the pointer to the failure stack, when
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
2897 it is allocated relocatably. */
410
3021132524bb merge with 1.11.f
Jim Meyering <jim@meyering.net>
parents: 409
diff changeset
2898 #ifdef REL_ALLOC
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
2899 fail_stack_elt_t *failure_stack_ptr;
409
e9f87c3ee38a (REGEX_FREE): Add back the `while (0)' hack
Jim Meyering <jim@meyering.net>
parents: 408
diff changeset
2900 #endif
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
2901
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2902 /* Assume that each path through the pattern can be null until
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2903 proven otherwise. We set this false at the bottom of switch
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2904 statement, to which we get only if a particular path doesn't
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2905 match the empty string. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2906 boolean path_can_be_null = true;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2907
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2908 /* We aren't doing a `succeed_n' to begin with. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2909 boolean succeed_n_p = false;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2910
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2911 assert (fastmap != NULL && p != NULL);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2912
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2913 INIT_FAIL_STACK ();
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2914 bzero (fastmap, 1 << BYTEWIDTH); /* Assume nothing's valid. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2915 bufp->fastmap_accurate = 1; /* It will be when we're done. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2916 bufp->can_be_null = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2917
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
2918 while (1)
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2919 {
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
2920 if (p == pend || *p == succeed)
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
2921 {
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
2922 /* We have reached the (effective) end of pattern. */
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
2923 if (!FAIL_STACK_EMPTY ())
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
2924 {
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
2925 bufp->can_be_null |= path_can_be_null;
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
2926
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
2927 /* Reset for next path. */
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
2928 path_can_be_null = true;
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
2929
415
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
2930 p = fail_stack.stack[--fail_stack.avail].pointer;
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
2931
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
2932 continue;
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
2933 }
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
2934 else
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
2935 break;
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2936 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2937
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2938 /* We should never be about to go beyond the end of the pattern. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2939 assert (p < pend);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2940
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
2941 switch (SWITCH_ENUM_CAST ((re_opcode_t) *p++))
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2942 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2943
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2944 /* I guess the idea here is to simply not bother with a fastmap
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2945 if a backreference is used, since it's too hard to figure out
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2946 the fastmap for the corresponding group. Setting
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2947 `can_be_null' stops `re_search_2' from using the fastmap, so
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2948 that is all we do. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2949 case duplicate:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2950 bufp->can_be_null = 1;
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
2951 goto done;
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2952
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2953
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2954 /* Following are the cases which match a character. These end
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2955 with `break'. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2956
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2957 case exactn:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2958 fastmap[p[1]] = 1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2959 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2960
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2961
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2962 case charset:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2963 for (j = *p++ * BYTEWIDTH - 1; j >= 0; j--)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2964 if (p[j / BYTEWIDTH] & (1 << (j % BYTEWIDTH)))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2965 fastmap[j] = 1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2966 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2967
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2968
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2969 case charset_not:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2970 /* Chars beyond end of map must be allowed. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2971 for (j = *p * BYTEWIDTH; j < (1 << BYTEWIDTH); j++)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2972 fastmap[j] = 1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2973
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2974 for (j = *p++ * BYTEWIDTH - 1; j >= 0; j--)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2975 if (!(p[j / BYTEWIDTH] & (1 << (j % BYTEWIDTH))))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2976 fastmap[j] = 1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2977 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2978
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2979
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2980 case wordchar:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2981 for (j = 0; j < (1 << BYTEWIDTH); j++)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2982 if (SYNTAX (j) == Sword)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2983 fastmap[j] = 1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2984 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2985
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2986
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2987 case notwordchar:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2988 for (j = 0; j < (1 << BYTEWIDTH); j++)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2989 if (SYNTAX (j) != Sword)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2990 fastmap[j] = 1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2991 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2992
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2993
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2994 case anychar:
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2995 {
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2996 int fastmap_newline = fastmap['\n'];
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2997
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2998 /* `.' matches anything ... */
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
2999 for (j = 0; j < (1 << BYTEWIDTH); j++)
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3000 fastmap[j] = 1;
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3001
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3002 /* ... except perhaps newline. */
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3003 if (!(bufp->syntax & RE_DOT_NEWLINE))
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3004 fastmap['\n'] = fastmap_newline;
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3005
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3006 /* Return if we have already set `can_be_null'; if we have,
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3007 then the fastmap is irrelevant. Something's wrong here. */
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3008 else if (bufp->can_be_null)
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
3009 goto done;
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3010
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3011 /* Otherwise, have to check alternative paths. */
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3012 break;
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3013 }
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3014
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3015 #ifdef emacs
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3016 case syntaxspec:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3017 k = *p++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3018 for (j = 0; j < (1 << BYTEWIDTH); j++)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3019 if (SYNTAX (j) == (enum syntaxcode) k)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3020 fastmap[j] = 1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3021 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3022
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3023
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3024 case notsyntaxspec:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3025 k = *p++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3026 for (j = 0; j < (1 << BYTEWIDTH); j++)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3027 if (SYNTAX (j) != (enum syntaxcode) k)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3028 fastmap[j] = 1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3029 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3030
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3031
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3032 /* All cases after this match the empty string. These end with
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3033 `continue'. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3034
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3035
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3036 case before_dot:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3037 case at_dot:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3038 case after_dot:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3039 continue;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3040 #endif /* not emacs */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3041
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3042
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3043 case no_op:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3044 case begline:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3045 case endline:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3046 case begbuf:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3047 case endbuf:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3048 case wordbound:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3049 case notwordbound:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3050 case wordbeg:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3051 case wordend:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3052 case push_dummy_failure:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3053 continue;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3054
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3055
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3056 case jump_n:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3057 case pop_failure_jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3058 case maybe_pop_jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3059 case jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3060 case jump_past_alt:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3061 case dummy_failure_jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3062 EXTRACT_NUMBER_AND_INCR (j, p);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3063 p += j;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3064 if (j > 0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3065 continue;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3066
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3067 /* Jump backward implies we just went through the body of a
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3068 loop and matched nothing. Opcode jumped to should be
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3069 `on_failure_jump' or `succeed_n'. Just treat it like an
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3070 ordinary jump. For a * loop, it has pushed its failure
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3071 point already; if so, discard that as redundant. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3072 if ((re_opcode_t) *p != on_failure_jump
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3073 && (re_opcode_t) *p != succeed_n)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3074 continue;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3075
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3076 p++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3077 EXTRACT_NUMBER_AND_INCR (j, p);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3078 p += j;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3079
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3080 /* If what's on the stack is where we are now, pop it. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3081 if (!FAIL_STACK_EMPTY ()
415
88587e01320b merge with 1.11.g
Jim Meyering <jim@meyering.net>
parents: 410
diff changeset
3082 && fail_stack.stack[fail_stack.avail - 1].pointer == p)
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3083 fail_stack.avail--;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3084
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3085 continue;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3086
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3087
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3088 case on_failure_jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3089 case on_failure_keep_string_jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3090 handle_on_failure_jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3091 EXTRACT_NUMBER_AND_INCR (j, p);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3092
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3093 /* For some patterns, e.g., `(a?)?', `p+j' here points to the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3094 end of the pattern. We don't want to push such a point,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3095 since when we restore it above, entering the switch will
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3096 increment `p' past the end of the pattern. We don't need
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3097 to push such a point since we obviously won't find any more
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3098 fastmap entries beyond `pend'. Such a pattern can match
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3099 the null string, though. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3100 if (p + j < pend)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3101 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3102 if (!PUSH_PATTERN_OP (p + j, fail_stack))
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
3103 {
440
79626753a234 merge with 1.11.1a
Jim Meyering <jim@meyering.net>
parents: 415
diff changeset
3104 RESET_FAIL_STACK ();
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
3105 return -2;
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
3106 }
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3107 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3108 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3109 bufp->can_be_null = 1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3110
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3111 if (succeed_n_p)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3112 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3113 EXTRACT_NUMBER_AND_INCR (k, p); /* Skip the n. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3114 succeed_n_p = false;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3115 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3116
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3117 continue;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3118
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3119
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3120 case succeed_n:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3121 /* Get to the number of times to succeed. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3122 p += 2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3123
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3124 /* Increment p past the n for when k != 0. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3125 EXTRACT_NUMBER_AND_INCR (k, p);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3126 if (k == 0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3127 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3128 p -= 4;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3129 succeed_n_p = true; /* Spaghetti code alert. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3130 goto handle_on_failure_jump;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3131 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3132 continue;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3133
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3134
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3135 case set_number_at:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3136 p += 4;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3137 continue;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3138
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3139
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3140 case start_memory:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3141 case stop_memory:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3142 p += 2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3143 continue;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3144
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3145
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3146 default:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3147 abort (); /* We have listed all the cases. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3148 } /* switch *p++ */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3149
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3150 /* Getting here means we have found the possible starting
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3151 characters for one path of the pattern -- and that the empty
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3152 string does not match. We need not follow this path further.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3153 Instead, look at the next alternative (remembered on the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3154 stack), or quit if no more. The test at the top of the loop
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3155 does these things. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3156 path_can_be_null = false;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3157 p = pend;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3158 } /* while p */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3159
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3160 /* Set `can_be_null' for the last path (also the first path, if the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3161 pattern is empty). */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3162 bufp->can_be_null |= path_can_be_null;
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
3163
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
3164 done:
440
79626753a234 merge with 1.11.1a
Jim Meyering <jim@meyering.net>
parents: 415
diff changeset
3165 RESET_FAIL_STACK ();
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3166 return 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3167 } /* re_compile_fastmap */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3168
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3169 /* Set REGS to hold NUM_REGS registers, storing them in STARTS and
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3170 ENDS. Subsequent matches using PATTERN_BUFFER and REGS will use
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3171 this memory for recording register information. STARTS and ENDS
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3172 must be allocated using the malloc library routine, and must each
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3173 be at least NUM_REGS * sizeof (regoff_t) bytes long.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3174
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3175 If NUM_REGS == 0, then subsequent matches should allocate their own
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3176 register data.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3177
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3178 Unless this function is called, the first search or match using
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3179 PATTERN_BUFFER will allocate its own register data, without
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3180 freeing the old data. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3181
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3182 void
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3183 re_set_registers (bufp, regs, num_regs, starts, ends)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3184 struct re_pattern_buffer *bufp;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3185 struct re_registers *regs;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3186 unsigned num_regs;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3187 regoff_t *starts, *ends;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3188 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3189 if (num_regs)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3190 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3191 bufp->regs_allocated = REGS_REALLOCATE;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3192 regs->num_regs = num_regs;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3193 regs->start = starts;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3194 regs->end = ends;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3195 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3196 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3197 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3198 bufp->regs_allocated = REGS_UNALLOCATED;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3199 regs->num_regs = 0;
175
5ae2aa44f4f5 merge with 1.9.1a
Jim Meyering <jim@meyering.net>
parents: 170
diff changeset
3200 regs->start = regs->end = (regoff_t *) 0;
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3201 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3202 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3203
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3204 /* Searching routines. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3205
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3206 /* Like re_search_2, below, but only one string is specified, and
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3207 doesn't let you say where to stop matching. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3208
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3209 int
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3210 re_search (bufp, string, size, startpos, range, regs)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3211 struct re_pattern_buffer *bufp;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3212 const char *string;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3213 int size, startpos, range;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3214 struct re_registers *regs;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3215 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3216 return re_search_2 (bufp, NULL, 0, string, size, startpos, range,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3217 regs, size);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3218 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3219
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3220
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3221 /* Using the compiled pattern in BUFP->buffer, first tries to match the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3222 virtual concatenation of STRING1 and STRING2, starting first at index
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3223 STARTPOS, then at STARTPOS + 1, and so on.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3224
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3225 STRING1 and STRING2 have length SIZE1 and SIZE2, respectively.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3226
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3227 RANGE is how far to scan while trying to match. RANGE = 0 means try
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3228 only at STARTPOS; in general, the last start tried is STARTPOS +
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3229 RANGE.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3230
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3231 In REGS, return the indices of the virtual concatenation of STRING1
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3232 and STRING2 that matched the entire BUFP->buffer and its contained
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3233 subexpressions.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3234
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3235 Do not consider matching one past the index STOP in the virtual
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3236 concatenation of STRING1 and STRING2.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3237
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3238 We return either the position in the strings at which the match was
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3239 found, -1 if no match, or -2 if error (such as failure
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3240 stack overflow). */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3241
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3242 int
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3243 re_search_2 (bufp, string1, size1, string2, size2, startpos, range, regs, stop)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3244 struct re_pattern_buffer *bufp;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3245 const char *string1, *string2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3246 int size1, size2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3247 int startpos;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3248 int range;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3249 struct re_registers *regs;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3250 int stop;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3251 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3252 int val;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3253 register char *fastmap = bufp->fastmap;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3254 register char *translate = bufp->translate;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3255 int total_size = size1 + size2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3256 int endpos = startpos + range;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3257
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3258 /* Check for out-of-range STARTPOS. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3259 if (startpos < 0 || startpos > total_size)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3260 return -1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3261
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3262 /* Fix up RANGE if it might eventually take us outside
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3263 the virtual concatenation of STRING1 and STRING2. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3264 if (endpos < -1)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3265 range = -1 - startpos;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3266 else if (endpos > total_size)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3267 range = total_size - startpos;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3268
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3269 /* If the search isn't to be a backwards one, don't waste time in a
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3270 search for a pattern that must be anchored. */
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3271 if (bufp->used > 0 && (re_opcode_t) bufp->buffer[0] == begbuf && range > 0)
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3272 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3273 if (startpos > 0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3274 return -1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3275 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3276 range = 1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3277 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3278
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3279 /* Update the fastmap now if not correct already. */
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3280 if (fastmap && !bufp->fastmap_accurate)
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3281 if (re_compile_fastmap (bufp) == -2)
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3282 return -2;
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3283
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3284 /* Loop through the string, looking for a place to start matching. */
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3285 for (;;)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3286 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3287 /* If a fastmap is supplied, skip quickly over characters that
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3288 cannot be the start of a match. If the pattern can match the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3289 null string, however, we don't need to skip characters; we want
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3290 the first null string. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3291 if (fastmap && startpos < total_size && !bufp->can_be_null)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3292 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3293 if (range > 0) /* Searching forwards. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3294 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3295 register const char *d;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3296 register int lim = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3297 int irange = range;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3298
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3299 if (startpos < size1 && startpos + range >= size1)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3300 lim = range - (size1 - startpos);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3301
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3302 d = (startpos >= size1 ? string2 - size1 : string1) + startpos;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3303
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3304 /* Written out as an if-else to avoid testing `translate'
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3305 inside the loop. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3306 if (translate)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3307 while (range > lim
80
d689538c6d85 merge with 1.4.1
Jim Meyering <jim@meyering.net>
parents: 55
diff changeset
3308 && !fastmap[(unsigned char)
d689538c6d85 merge with 1.4.1
Jim Meyering <jim@meyering.net>
parents: 55
diff changeset
3309 translate[(unsigned char) *d++]])
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3310 range--;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3311 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3312 while (range > lim && !fastmap[(unsigned char) *d++])
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3313 range--;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3314
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3315 startpos += irange - range;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3316 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3317 else /* Searching backwards. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3318 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3319 register char c = (size1 == 0 || startpos >= size1
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3320 ? string2[startpos - size1]
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3321 : string1[startpos]);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3322
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3323 if (!fastmap[(unsigned char) TRANSLATE (c)])
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3324 goto advance;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3325 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3326 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3327
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3328 /* If can't match the null string, and that's all we have left, fail. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3329 if (range >= 0 && startpos == total_size && fastmap
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3330 && !bufp->can_be_null)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3331 return -1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3332
198
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3333 val = re_match_2_internal (bufp, string1, size1, string2, size2,
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3334 startpos, regs, stop);
218
98a79ea5cac6 merge with 1.9.1f
Jim Meyering <jim@meyering.net>
parents: 217
diff changeset
3335 #ifndef REGEX_MALLOC
98a79ea5cac6 merge with 1.9.1f
Jim Meyering <jim@meyering.net>
parents: 217
diff changeset
3336 #ifdef C_ALLOCA
198
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3337 alloca (0);
218
98a79ea5cac6 merge with 1.9.1f
Jim Meyering <jim@meyering.net>
parents: 217
diff changeset
3338 #endif
98a79ea5cac6 merge with 1.9.1f
Jim Meyering <jim@meyering.net>
parents: 217
diff changeset
3339 #endif
198
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3340
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3341 if (val >= 0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3342 return startpos;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3343
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3344 if (val == -2)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3345 return -2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3346
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3347 advance:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3348 if (!range)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3349 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3350 else if (range > 0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3351 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3352 range--;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3353 startpos++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3354 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3355 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3356 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3357 range++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3358 startpos--;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3359 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3360 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3361 return -1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3362 } /* re_search_2 */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3363
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3364 /* Declarations and macros for re_match_2. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3365
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3366 static int bcmp_translate ();
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3367 static boolean alt_match_null_string_p (),
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3368 common_op_match_null_string_p (),
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3369 group_match_null_string_p ();
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3370
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3371 /* This converts PTR, a pointer into one of the search strings `string1'
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3372 and `string2' into an offset from the beginning of that string. */
170
31018ef0f0e8 merge with 1.9
Jim Meyering <jim@meyering.net>
parents: 127
diff changeset
3373 #define POINTER_TO_OFFSET(ptr) \
31018ef0f0e8 merge with 1.9
Jim Meyering <jim@meyering.net>
parents: 127
diff changeset
3374 (FIRST_STRING_P (ptr) \
31018ef0f0e8 merge with 1.9
Jim Meyering <jim@meyering.net>
parents: 127
diff changeset
3375 ? ((regoff_t) ((ptr) - string1)) \
31018ef0f0e8 merge with 1.9
Jim Meyering <jim@meyering.net>
parents: 127
diff changeset
3376 : ((regoff_t) ((ptr) - string2 + size1)))
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3377
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3378 /* Macros for dealing with the split strings in re_match_2. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3379
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3380 #define MATCHING_IN_FIRST_STRING (dend == end_match_1)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3381
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3382 /* Call before fetching a character with *d. This switches over to
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3383 string2 if necessary. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3384 #define PREFETCH() \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3385 while (d == dend) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3386 { \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3387 /* End of string2 => fail. */ \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3388 if (dend == end_match_2) \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3389 goto fail; \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3390 /* End of string1 => advance to string2. */ \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3391 d = string2; \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3392 dend = end_match_2; \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3393 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3394
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3395
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3396 /* Test if at very beginning or at very end of the virtual concatenation
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3397 of `string1' and `string2'. If only one string, it's `string2'. */
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3398 #define AT_STRINGS_BEG(d) ((d) == (size1 ? string1 : string2) || !size2)
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3399 #define AT_STRINGS_END(d) ((d) == end2)
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3400
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3401
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3402 /* Test if D points to a character which is word-constituent. We have
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3403 two special cases to check for: if past the end of string1, look at
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3404 the first character in string2; and if before the beginning of
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3405 string2, look at the last character in string1. */
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3406 #define WORDCHAR_P(d) \
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3407 (SYNTAX ((d) == end1 ? *string2 \
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3408 : (d) == string2 - 1 ? *(end1 - 1) : *(d)) \
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3409 == Sword)
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3410
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3411 /* Test if the character before D and the one at D differ with respect
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3412 to being word-constituent. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3413 #define AT_WORD_BOUNDARY(d) \
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3414 (AT_STRINGS_BEG (d) || AT_STRINGS_END (d) \
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3415 || WORDCHAR_P (d - 1) != WORDCHAR_P (d))
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3416
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3417
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3418 /* Free everything we malloc. */
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
3419 #ifdef MATCH_MAY_ALLOCATE
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
3420 #define FREE_VAR(var) if (var) REGEX_FREE (var); var = NULL
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3421 #define FREE_VARIABLES() \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3422 do { \
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
3423 REGEX_FREE_STACK (fail_stack.stack); \
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3424 FREE_VAR (regstart); \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3425 FREE_VAR (regend); \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3426 FREE_VAR (old_regstart); \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3427 FREE_VAR (old_regend); \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3428 FREE_VAR (best_regstart); \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3429 FREE_VAR (best_regend); \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3430 FREE_VAR (reg_info); \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3431 FREE_VAR (reg_dummy); \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3432 FREE_VAR (reg_info_dummy); \
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3433 } while (0)
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
3434 #else
440
79626753a234 merge with 1.11.1a
Jim Meyering <jim@meyering.net>
parents: 415
diff changeset
3435 #define FREE_VARIABLES() ((void)0) /* Do nothing! But inhibit gcc warning. */
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
3436 #endif /* not MATCH_MAY_ALLOCATE */
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3437
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3438 /* These values must meet several constraints. They must not be valid
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3439 register values; since we have a limit of 255 registers (because
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3440 we use only one byte in the pattern for the register number), we can
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3441 use numbers larger than 255. They must differ by 1, because of
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3442 NUM_FAILURE_ITEMS above. And the value for the lowest register must
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3443 be larger than the value for the highest register, so we do not try
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3444 to actually save any registers when none are active. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3445 #define NO_HIGHEST_ACTIVE_REG (1 << BYTEWIDTH)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3446 #define NO_LOWEST_ACTIVE_REG (NO_HIGHEST_ACTIVE_REG + 1)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3447
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3448 /* Matching routines. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3449
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3450 #ifndef emacs /* Emacs never uses this. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3451 /* re_match is like re_match_2 except it takes only a single string. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3452
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3453 int
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3454 re_match (bufp, string, size, pos, regs)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3455 struct re_pattern_buffer *bufp;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3456 const char *string;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3457 int size, pos;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3458 struct re_registers *regs;
198
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3459 {
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3460 int result = re_match_2_internal (bufp, NULL, 0, string, size,
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3461 pos, regs, size);
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3462 alloca (0);
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3463 return result;
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3464 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3465 #endif /* not emacs */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3466
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3467
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3468 /* re_match_2 matches the compiled pattern in BUFP against the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3469 the (virtual) concatenation of STRING1 and STRING2 (of length SIZE1
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3470 and SIZE2, respectively). We start matching at POS, and stop
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3471 matching at STOP.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3472
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3473 If REGS is non-null and the `no_sub' field of BUFP is nonzero, we
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3474 store offsets for the substring each group matched in REGS. See the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3475 documentation for exactly how many groups we fill.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3476
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3477 We return -1 if no match, -2 if an internal error (such as the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3478 failure stack overflowing). Otherwise, we return the length of the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3479 matched substring. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3480
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3481 int
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3482 re_match_2 (bufp, string1, size1, string2, size2, pos, regs, stop)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3483 struct re_pattern_buffer *bufp;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3484 const char *string1, *string2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3485 int size1, size2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3486 int pos;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3487 struct re_registers *regs;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3488 int stop;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3489 {
198
5db9ec871df6 merge with 1.9.1e
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parents: 175
diff changeset
3490 int result = re_match_2_internal (bufp, string1, size1, string2, size2,
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3491 pos, regs, stop);
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3492 alloca (0);
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3493 return result;
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3494 }
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3495
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3496 /* This is a separate function so that we can force an alloca cleanup
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3497 afterwards. */
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3498 static int
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3499 re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3500 struct re_pattern_buffer *bufp;
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3501 const char *string1, *string2;
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3502 int size1, size2;
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3503 int pos;
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3504 struct re_registers *regs;
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3505 int stop;
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3506 {
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3507 /* General temporaries. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3508 int mcnt;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3509 unsigned char *p1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3510
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3511 /* Just past the end of the corresponding string. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3512 const char *end1, *end2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3513
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3514 /* Pointers into string1 and string2, just past the last characters in
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3515 each to consider matching. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3516 const char *end_match_1, *end_match_2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3517
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3518 /* Where we are in the data, and the end of the current string. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3519 const char *d, *dend;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3520
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3521 /* Where we are in the pattern, and the end of the pattern. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3522 unsigned char *p = bufp->buffer;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3523 register unsigned char *pend = p + bufp->used;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3524
198
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3525 /* Mark the opcode just after a start_memory, so we can test for an
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3526 empty subpattern when we get to the stop_memory. */
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3527 unsigned char *just_past_start_mem = 0;
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
3528
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3529 /* We use this to map every character in the string. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3530 char *translate = bufp->translate;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3531
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3532 /* Failure point stack. Each place that can handle a failure further
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3533 down the line pushes a failure point on this stack. It consists of
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3534 restart, regend, and reg_info for all registers corresponding to
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3535 the subexpressions we're currently inside, plus the number of such
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3536 registers, and, finally, two char *'s. The first char * is where
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3537 to resume scanning the pattern; the second one is where to resume
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3538 scanning the strings. If the latter is zero, the failure point is
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3539 a ``dummy''; if a failure happens and the failure point is a dummy,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3540 it gets discarded and the next next one is tried. */
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
3541 #ifdef MATCH_MAY_ALLOCATE /* otherwise, this is global. */
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3542 fail_stack_type fail_stack;
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
3543 #endif
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3544 #ifdef DEBUG
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3545 static unsigned failure_id = 0;
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3546 unsigned nfailure_points_pushed = 0, nfailure_points_popped = 0;
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3547 #endif
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3548
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
3549 /* This holds the pointer to the failure stack, when
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
3550 it is allocated relocatably. */
410
3021132524bb merge with 1.11.f
Jim Meyering <jim@meyering.net>
parents: 409
diff changeset
3551 #ifdef REL_ALLOC
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
3552 fail_stack_elt_t *failure_stack_ptr;
409
e9f87c3ee38a (REGEX_FREE): Add back the `while (0)' hack
Jim Meyering <jim@meyering.net>
parents: 408
diff changeset
3553 #endif
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
3554
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3555 /* We fill all the registers internally, independent of what we
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3556 return, for use in backreferences. The number here includes
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3557 an element for register zero. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3558 unsigned num_regs = bufp->re_nsub + 1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3559
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3560 /* The currently active registers. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3561 unsigned lowest_active_reg = NO_LOWEST_ACTIVE_REG;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3562 unsigned highest_active_reg = NO_HIGHEST_ACTIVE_REG;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3563
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3564 /* Information on the contents of registers. These are pointers into
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3565 the input strings; they record just what was matched (on this
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3566 attempt) by a subexpression part of the pattern, that is, the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3567 regnum-th regstart pointer points to where in the pattern we began
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3568 matching and the regnum-th regend points to right after where we
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3569 stopped matching the regnum-th subexpression. (The zeroth register
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3570 keeps track of what the whole pattern matches.) */
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
3571 #ifdef MATCH_MAY_ALLOCATE /* otherwise, these are global. */
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3572 const char **regstart, **regend;
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
3573 #endif
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3574
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3575 /* If a group that's operated upon by a repetition operator fails to
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3576 match anything, then the register for its start will need to be
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3577 restored because it will have been set to wherever in the string we
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3578 are when we last see its open-group operator. Similarly for a
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3579 register's end. */
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
3580 #ifdef MATCH_MAY_ALLOCATE /* otherwise, these are global. */
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3581 const char **old_regstart, **old_regend;
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
3582 #endif
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3583
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3584 /* The is_active field of reg_info helps us keep track of which (possibly
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3585 nested) subexpressions we are currently in. The matched_something
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3586 field of reg_info[reg_num] helps us tell whether or not we have
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3587 matched any of the pattern so far this time through the reg_num-th
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3588 subexpression. These two fields get reset each time through any
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3589 loop their register is in. */
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
3590 #ifdef MATCH_MAY_ALLOCATE /* otherwise, this is global. */
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3591 register_info_type *reg_info;
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
3592 #endif
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3593
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3594 /* The following record the register info as found in the above
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3595 variables when we find a match better than any we've seen before.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3596 This happens as we backtrack through the failure points, which in
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3597 turn happens only if we have not yet matched the entire string. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3598 unsigned best_regs_set = false;
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
3599 #ifdef MATCH_MAY_ALLOCATE /* otherwise, these are global. */
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3600 const char **best_regstart, **best_regend;
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
3601 #endif
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3602
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3603 /* Logically, this is `best_regend[0]'. But we don't want to have to
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3604 allocate space for that if we're not allocating space for anything
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3605 else (see below). Also, we never need info about register 0 for
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3606 any of the other register vectors, and it seems rather a kludge to
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3607 treat `best_regend' differently than the rest. So we keep track of
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3608 the end of the best match so far in a separate variable. We
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3609 initialize this to NULL so that when we backtrack the first time
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3610 and need to test it, it's not garbage. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3611 const char *match_end = NULL;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3612
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
3613 /* This helps SET_REGS_MATCHED avoid doing redundant work. */
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
3614 int set_regs_matched_done = 0;
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
3615
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3616 /* Used when we pop values we don't care about. */
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
3617 #ifdef MATCH_MAY_ALLOCATE /* otherwise, these are global. */
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3618 const char **reg_dummy;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3619 register_info_type *reg_info_dummy;
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
3620 #endif
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3621
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3622 #ifdef DEBUG
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3623 /* Counts the total number of registers pushed. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3624 unsigned num_regs_pushed = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3625 #endif
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3626
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3627 DEBUG_PRINT1 ("\n\nEntering re_match_2.\n");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3628
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3629 INIT_FAIL_STACK ();
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3630
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
3631 #ifdef MATCH_MAY_ALLOCATE
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3632 /* Do not bother to initialize all the register variables if there are
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3633 no groups in the pattern, as it takes a fair amount of time. If
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3634 there are groups, we include space for register 0 (the whole
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3635 pattern), even though we never use it, since it simplifies the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3636 array indexing. We should fix this. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3637 if (bufp->re_nsub)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3638 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3639 regstart = REGEX_TALLOC (num_regs, const char *);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3640 regend = REGEX_TALLOC (num_regs, const char *);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3641 old_regstart = REGEX_TALLOC (num_regs, const char *);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3642 old_regend = REGEX_TALLOC (num_regs, const char *);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3643 best_regstart = REGEX_TALLOC (num_regs, const char *);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3644 best_regend = REGEX_TALLOC (num_regs, const char *);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3645 reg_info = REGEX_TALLOC (num_regs, register_info_type);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3646 reg_dummy = REGEX_TALLOC (num_regs, const char *);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3647 reg_info_dummy = REGEX_TALLOC (num_regs, register_info_type);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3648
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3649 if (!(regstart && regend && old_regstart && old_regend && reg_info
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3650 && best_regstart && best_regend && reg_dummy && reg_info_dummy))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3651 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3652 FREE_VARIABLES ();
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3653 return -2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3654 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3655 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3656 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3657 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3658 /* We must initialize all our variables to NULL, so that
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3659 `FREE_VARIABLES' doesn't try to free them. */
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3660 regstart = regend = old_regstart = old_regend = best_regstart
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3661 = best_regend = reg_dummy = NULL;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3662 reg_info = reg_info_dummy = (register_info_type *) NULL;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3663 }
90
8ae3f7b8863d merge with 1.6
Jim Meyering <jim@meyering.net>
parents: 86
diff changeset
3664 #endif /* MATCH_MAY_ALLOCATE */
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3665
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3666 /* The starting position is bogus. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3667 if (pos < 0 || pos > size1 + size2)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3668 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3669 FREE_VARIABLES ();
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3670 return -1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3671 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3672
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3673 /* Initialize subexpression text positions to -1 to mark ones that no
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3674 start_memory/stop_memory has been seen for. Also initialize the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3675 register information struct. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3676 for (mcnt = 1; mcnt < num_regs; mcnt++)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3677 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3678 regstart[mcnt] = regend[mcnt]
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3679 = old_regstart[mcnt] = old_regend[mcnt] = REG_UNSET_VALUE;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3680
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3681 REG_MATCH_NULL_STRING_P (reg_info[mcnt]) = MATCH_NULL_UNSET_VALUE;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3682 IS_ACTIVE (reg_info[mcnt]) = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3683 MATCHED_SOMETHING (reg_info[mcnt]) = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3684 EVER_MATCHED_SOMETHING (reg_info[mcnt]) = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3685 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3686
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3687 /* We move `string1' into `string2' if the latter's empty -- but not if
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3688 `string1' is null. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3689 if (size2 == 0 && string1 != NULL)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3690 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3691 string2 = string1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3692 size2 = size1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3693 string1 = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3694 size1 = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3695 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3696 end1 = string1 + size1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3697 end2 = string2 + size2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3698
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3699 /* Compute where to stop matching, within the two strings. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3700 if (stop <= size1)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3701 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3702 end_match_1 = string1 + stop;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3703 end_match_2 = string2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3704 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3705 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3706 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3707 end_match_1 = end1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3708 end_match_2 = string2 + stop - size1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3709 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3710
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3711 /* `p' scans through the pattern as `d' scans through the data.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3712 `dend' is the end of the input string that `d' points within. `d'
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3713 is advanced into the following input string whenever necessary, but
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3714 this happens before fetching; therefore, at the beginning of the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3715 loop, `d' can be pointing at the end of a string, but it cannot
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3716 equal `string2'. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3717 if (size1 > 0 && pos <= size1)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3718 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3719 d = string1 + pos;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3720 dend = end_match_1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3721 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3722 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3723 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3724 d = string2 + pos - size1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3725 dend = end_match_2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3726 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3727
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3728 DEBUG_PRINT1 ("The compiled pattern is: ");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3729 DEBUG_PRINT_COMPILED_PATTERN (bufp, p, pend);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3730 DEBUG_PRINT1 ("The string to match is: `");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3731 DEBUG_PRINT_DOUBLE_STRING (d, string1, size1, string2, size2);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3732 DEBUG_PRINT1 ("'\n");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3733
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3734 /* This loops over pattern commands. It exits by returning from the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3735 function if the match is complete, or it drops through if the match
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3736 fails at this starting point in the input data. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3737 for (;;)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3738 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3739 DEBUG_PRINT2 ("\n0x%x: ", p);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3740
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3741 if (p == pend)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3742 { /* End of pattern means we might have succeeded. */
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3743 DEBUG_PRINT1 ("end of pattern ... ");
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3744
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3745 /* If we haven't matched the entire string, and we want the
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3746 longest match, try backtracking. */
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3747 if (d != end_match_2)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3748 {
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3749 /* 1 if this match ends in the same string (string1 or string2)
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3750 as the best previous match. */
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3751 boolean same_str_p = (FIRST_STRING_P (match_end)
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3752 == MATCHING_IN_FIRST_STRING);
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3753 /* 1 if this match is the best seen so far. */
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3754 boolean best_match_p;
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3755
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3756 /* AIX compiler got confused when this was combined
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3757 with the previous declaration. */
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3758 if (same_str_p)
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3759 best_match_p = d > match_end;
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3760 else
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3761 best_match_p = !MATCHING_IN_FIRST_STRING;
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3762
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3763 DEBUG_PRINT1 ("backtracking.\n");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3764
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3765 if (!FAIL_STACK_EMPTY ())
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3766 { /* More failure points to try. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3767
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3768 /* If exceeds best match so far, save it. */
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3769 if (!best_regs_set || best_match_p)
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3770 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3771 best_regs_set = true;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3772 match_end = d;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3773
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3774 DEBUG_PRINT1 ("\nSAVING match as best so far.\n");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3775
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3776 for (mcnt = 1; mcnt < num_regs; mcnt++)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3777 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3778 best_regstart[mcnt] = regstart[mcnt];
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3779 best_regend[mcnt] = regend[mcnt];
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3780 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3781 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3782 goto fail;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3783 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3784
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3785 /* If no failure points, don't restore garbage. And if
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3786 last match is real best match, don't restore second
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3787 best one. */
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
3788 else if (best_regs_set && !best_match_p)
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3789 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3790 restore_best_regs:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3791 /* Restore best match. It may happen that `dend ==
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3792 end_match_1' while the restored d is in string2.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3793 For example, the pattern `x.*y.*z' against the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3794 strings `x-' and `y-z-', if the two strings are
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3795 not consecutive in memory. */
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3796 DEBUG_PRINT1 ("Restoring best registers.\n");
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3797
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3798 d = match_end;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3799 dend = ((d >= string1 && d <= end1)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3800 ? end_match_1 : end_match_2);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3801
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3802 for (mcnt = 1; mcnt < num_regs; mcnt++)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3803 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3804 regstart[mcnt] = best_regstart[mcnt];
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3805 regend[mcnt] = best_regend[mcnt];
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3806 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3807 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3808 } /* d != end_match_2 */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3809
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
3810 succeed_label:
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3811 DEBUG_PRINT1 ("Accepting match.\n");
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3812
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3813 /* If caller wants register contents data back, do it. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3814 if (regs && !bufp->no_sub)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3815 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3816 /* Have the register data arrays been allocated? */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3817 if (bufp->regs_allocated == REGS_UNALLOCATED)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3818 { /* No. So allocate them with malloc. We need one
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3819 extra element beyond `num_regs' for the `-1' marker
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3820 GNU code uses. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3821 regs->num_regs = MAX (RE_NREGS, num_regs + 1);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3822 regs->start = TALLOC (regs->num_regs, regoff_t);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3823 regs->end = TALLOC (regs->num_regs, regoff_t);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3824 if (regs->start == NULL || regs->end == NULL)
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
3825 {
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
3826 FREE_VARIABLES ();
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
3827 return -2;
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
3828 }
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3829 bufp->regs_allocated = REGS_REALLOCATE;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3830 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3831 else if (bufp->regs_allocated == REGS_REALLOCATE)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3832 { /* Yes. If we need more elements than were already
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3833 allocated, reallocate them. If we need fewer, just
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3834 leave it alone. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3835 if (regs->num_regs < num_regs + 1)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3836 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3837 regs->num_regs = num_regs + 1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3838 RETALLOC (regs->start, regs->num_regs, regoff_t);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3839 RETALLOC (regs->end, regs->num_regs, regoff_t);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3840 if (regs->start == NULL || regs->end == NULL)
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
3841 {
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
3842 FREE_VARIABLES ();
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
3843 return -2;
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
3844 }
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3845 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3846 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3847 else
80
d689538c6d85 merge with 1.4.1
Jim Meyering <jim@meyering.net>
parents: 55
diff changeset
3848 {
d689538c6d85 merge with 1.4.1
Jim Meyering <jim@meyering.net>
parents: 55
diff changeset
3849 /* These braces fend off a "empty body in an else-statement"
d689538c6d85 merge with 1.4.1
Jim Meyering <jim@meyering.net>
parents: 55
diff changeset
3850 warning under GCC when assert expands to nothing. */
d689538c6d85 merge with 1.4.1
Jim Meyering <jim@meyering.net>
parents: 55
diff changeset
3851 assert (bufp->regs_allocated == REGS_FIXED);
d689538c6d85 merge with 1.4.1
Jim Meyering <jim@meyering.net>
parents: 55
diff changeset
3852 }
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3853
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3854 /* Convert the pointer data in `regstart' and `regend' to
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3855 indices. Register zero has to be set differently,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3856 since we haven't kept track of any info for it. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3857 if (regs->num_regs > 0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3858 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3859 regs->start[0] = pos;
170
31018ef0f0e8 merge with 1.9
Jim Meyering <jim@meyering.net>
parents: 127
diff changeset
3860 regs->end[0] = (MATCHING_IN_FIRST_STRING
31018ef0f0e8 merge with 1.9
Jim Meyering <jim@meyering.net>
parents: 127
diff changeset
3861 ? ((regoff_t) (d - string1))
31018ef0f0e8 merge with 1.9
Jim Meyering <jim@meyering.net>
parents: 127
diff changeset
3862 : ((regoff_t) (d - string2 + size1)));
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3863 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3864
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3865 /* Go through the first `min (num_regs, regs->num_regs)'
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3866 registers, since that is all we initialized. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3867 for (mcnt = 1; mcnt < MIN (num_regs, regs->num_regs); mcnt++)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3868 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3869 if (REG_UNSET (regstart[mcnt]) || REG_UNSET (regend[mcnt]))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3870 regs->start[mcnt] = regs->end[mcnt] = -1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3871 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3872 {
170
31018ef0f0e8 merge with 1.9
Jim Meyering <jim@meyering.net>
parents: 127
diff changeset
3873 regs->start[mcnt]
31018ef0f0e8 merge with 1.9
Jim Meyering <jim@meyering.net>
parents: 127
diff changeset
3874 = (regoff_t) POINTER_TO_OFFSET (regstart[mcnt]);
31018ef0f0e8 merge with 1.9
Jim Meyering <jim@meyering.net>
parents: 127
diff changeset
3875 regs->end[mcnt]
31018ef0f0e8 merge with 1.9
Jim Meyering <jim@meyering.net>
parents: 127
diff changeset
3876 = (regoff_t) POINTER_TO_OFFSET (regend[mcnt]);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3877 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3878 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3879
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3880 /* If the regs structure we return has more elements than
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3881 were in the pattern, set the extra elements to -1. If
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3882 we (re)allocated the registers, this is the case,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3883 because we always allocate enough to have at least one
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3884 -1 at the end. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3885 for (mcnt = num_regs; mcnt < regs->num_regs; mcnt++)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3886 regs->start[mcnt] = regs->end[mcnt] = -1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3887 } /* regs && !bufp->no_sub */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3888
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3889 DEBUG_PRINT4 ("%u failure points pushed, %u popped (%u remain).\n",
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3890 nfailure_points_pushed, nfailure_points_popped,
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3891 nfailure_points_pushed - nfailure_points_popped);
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
3892 DEBUG_PRINT2 ("%u registers pushed.\n", num_regs_pushed);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3893
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3894 mcnt = d - pos - (MATCHING_IN_FIRST_STRING
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3895 ? string1
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3896 : string2 - size1);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3897
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3898 DEBUG_PRINT2 ("Returning %d from re_match_2.\n", mcnt);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3899
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
3900 FREE_VARIABLES ();
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3901 return mcnt;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3902 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3903
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3904 /* Otherwise match next pattern command. */
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
3905 switch (SWITCH_ENUM_CAST ((re_opcode_t) *p++))
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3906 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3907 /* Ignore these. Used to ignore the n of succeed_n's which
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3908 currently have n == 0. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3909 case no_op:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3910 DEBUG_PRINT1 ("EXECUTING no_op.\n");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3911 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3912
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
3913 case succeed:
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
3914 DEBUG_PRINT1 ("EXECUTING succeed.\n");
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
3915 goto succeed_label;
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3916
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3917 /* Match the next n pattern characters exactly. The following
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3918 byte in the pattern defines n, and the n bytes after that
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3919 are the characters to match. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3920 case exactn:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3921 mcnt = *p++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3922 DEBUG_PRINT2 ("EXECUTING exactn %d.\n", mcnt);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3923
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3924 /* This is written out as an if-else so we don't waste time
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3925 testing `translate' inside the loop. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3926 if (translate)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3927 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3928 do
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3929 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3930 PREFETCH ();
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3931 if (translate[(unsigned char) *d++] != (char) *p++)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3932 goto fail;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3933 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3934 while (--mcnt);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3935 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3936 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3937 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3938 do
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3939 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3940 PREFETCH ();
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3941 if (*d++ != (char) *p++) goto fail;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3942 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3943 while (--mcnt);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3944 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3945 SET_REGS_MATCHED ();
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3946 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3947
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3948
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3949 /* Match any character except possibly a newline or a null. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3950 case anychar:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3951 DEBUG_PRINT1 ("EXECUTING anychar.\n");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3952
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3953 PREFETCH ();
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3954
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3955 if ((!(bufp->syntax & RE_DOT_NEWLINE) && TRANSLATE (*d) == '\n')
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3956 || (bufp->syntax & RE_DOT_NOT_NULL && TRANSLATE (*d) == '\000'))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3957 goto fail;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3958
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3959 SET_REGS_MATCHED ();
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3960 DEBUG_PRINT2 (" Matched `%d'.\n", *d);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3961 d++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3962 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3963
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3964
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3965 case charset:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3966 case charset_not:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3967 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3968 register unsigned char c;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3969 boolean not = (re_opcode_t) *(p - 1) == charset_not;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3970
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3971 DEBUG_PRINT2 ("EXECUTING charset%s.\n", not ? "_not" : "");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3972
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3973 PREFETCH ();
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3974 c = TRANSLATE (*d); /* The character to match. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3975
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3976 /* Cast to `unsigned' instead of `unsigned char' in case the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3977 bit list is a full 32 bytes long. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3978 if (c < (unsigned) (*p * BYTEWIDTH)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3979 && p[1 + c / BYTEWIDTH] & (1 << (c % BYTEWIDTH)))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3980 not = !not;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3981
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3982 p += 1 + *p;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3983
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3984 if (!not) goto fail;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3985
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3986 SET_REGS_MATCHED ();
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3987 d++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3988 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3989 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3990
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3991
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3992 /* The beginning of a group is represented by start_memory.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3993 The arguments are the register number in the next byte, and the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3994 number of groups inner to this one in the next. The text
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3995 matched within the group is recorded (in the internal
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3996 registers data structure) under the register number. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3997 case start_memory:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3998 DEBUG_PRINT3 ("EXECUTING start_memory %d (%d):\n", *p, p[1]);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
3999
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4000 /* Find out if this group can match the empty string. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4001 p1 = p; /* To send to group_match_null_string_p. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4002
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4003 if (REG_MATCH_NULL_STRING_P (reg_info[*p]) == MATCH_NULL_UNSET_VALUE)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4004 REG_MATCH_NULL_STRING_P (reg_info[*p])
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4005 = group_match_null_string_p (&p1, pend, reg_info);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4006
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4007 /* Save the position in the string where we were the last time
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4008 we were at this open-group operator in case the group is
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4009 operated upon by a repetition operator, e.g., with `(a*)*b'
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4010 against `ab'; then we want to ignore where we are now in
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4011 the string in case this attempt to match fails. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4012 old_regstart[*p] = REG_MATCH_NULL_STRING_P (reg_info[*p])
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4013 ? REG_UNSET (regstart[*p]) ? d : regstart[*p]
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4014 : regstart[*p];
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4015 DEBUG_PRINT2 (" old_regstart: %d\n",
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4016 POINTER_TO_OFFSET (old_regstart[*p]));
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4017
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4018 regstart[*p] = d;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4019 DEBUG_PRINT2 (" regstart: %d\n", POINTER_TO_OFFSET (regstart[*p]));
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4020
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4021 IS_ACTIVE (reg_info[*p]) = 1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4022 MATCHED_SOMETHING (reg_info[*p]) = 0;
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
4023
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
4024 /* Clear this whenever we change the register activity status. */
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
4025 set_regs_matched_done = 0;
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4026
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4027 /* This is the new highest active register. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4028 highest_active_reg = *p;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4029
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4030 /* If nothing was active before, this is the new lowest active
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4031 register. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4032 if (lowest_active_reg == NO_LOWEST_ACTIVE_REG)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4033 lowest_active_reg = *p;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4034
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4035 /* Move past the register number and inner group count. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4036 p += 2;
198
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
4037 just_past_start_mem = p;
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
4038
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4039 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4040
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4041
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4042 /* The stop_memory opcode represents the end of a group. Its
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4043 arguments are the same as start_memory's: the register
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4044 number, and the number of inner groups. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4045 case stop_memory:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4046 DEBUG_PRINT3 ("EXECUTING stop_memory %d (%d):\n", *p, p[1]);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4047
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4048 /* We need to save the string position the last time we were at
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4049 this close-group operator in case the group is operated
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4050 upon by a repetition operator, e.g., with `((a*)*(b*)*)*'
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4051 against `aba'; then we want to ignore where we are now in
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4052 the string in case this attempt to match fails. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4053 old_regend[*p] = REG_MATCH_NULL_STRING_P (reg_info[*p])
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4054 ? REG_UNSET (regend[*p]) ? d : regend[*p]
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4055 : regend[*p];
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4056 DEBUG_PRINT2 (" old_regend: %d\n",
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4057 POINTER_TO_OFFSET (old_regend[*p]));
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4058
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4059 regend[*p] = d;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4060 DEBUG_PRINT2 (" regend: %d\n", POINTER_TO_OFFSET (regend[*p]));
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4061
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4062 /* This register isn't active anymore. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4063 IS_ACTIVE (reg_info[*p]) = 0;
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
4064
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
4065 /* Clear this whenever we change the register activity status. */
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
4066 set_regs_matched_done = 0;
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
4067
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4068 /* If this was the only register active, nothing is active
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4069 anymore. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4070 if (lowest_active_reg == highest_active_reg)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4071 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4072 lowest_active_reg = NO_LOWEST_ACTIVE_REG;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4073 highest_active_reg = NO_HIGHEST_ACTIVE_REG;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4074 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4075 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4076 { /* We must scan for the new highest active register, since
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4077 it isn't necessarily one less than now: consider
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4078 (a(b)c(d(e)f)g). When group 3 ends, after the f), the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4079 new highest active register is 1. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4080 unsigned char r = *p - 1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4081 while (r > 0 && !IS_ACTIVE (reg_info[r]))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4082 r--;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4083
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4084 /* If we end up at register zero, that means that we saved
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4085 the registers as the result of an `on_failure_jump', not
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4086 a `start_memory', and we jumped to past the innermost
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4087 `stop_memory'. For example, in ((.)*) we save
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4088 registers 1 and 2 as a result of the *, but when we pop
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4089 back to the second ), we are at the stop_memory 1.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4090 Thus, nothing is active. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4091 if (r == 0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4092 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4093 lowest_active_reg = NO_LOWEST_ACTIVE_REG;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4094 highest_active_reg = NO_HIGHEST_ACTIVE_REG;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4095 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4096 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4097 highest_active_reg = r;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4098 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4099
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4100 /* If just failed to match something this time around with a
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4101 group that's operated on by a repetition operator, try to
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4102 force exit from the ``loop'', and restore the register
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4103 information for this group that we had before trying this
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4104 last match. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4105 if ((!MATCHED_SOMETHING (reg_info[*p])
198
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
4106 || just_past_start_mem == p - 1)
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4107 && (p + 2) < pend)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4108 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4109 boolean is_a_jump_n = false;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4110
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4111 p1 = p + 2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4112 mcnt = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4113 switch ((re_opcode_t) *p1++)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4114 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4115 case jump_n:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4116 is_a_jump_n = true;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4117 case pop_failure_jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4118 case maybe_pop_jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4119 case jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4120 case dummy_failure_jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4121 EXTRACT_NUMBER_AND_INCR (mcnt, p1);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4122 if (is_a_jump_n)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4123 p1 += 2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4124 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4125
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4126 default:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4127 /* do nothing */ ;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4128 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4129 p1 += mcnt;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4130
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4131 /* If the next operation is a jump backwards in the pattern
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4132 to an on_failure_jump right before the start_memory
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4133 corresponding to this stop_memory, exit from the loop
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4134 by forcing a failure after pushing on the stack the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4135 on_failure_jump's jump in the pattern, and d. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4136 if (mcnt < 0 && (re_opcode_t) *p1 == on_failure_jump
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4137 && (re_opcode_t) p1[3] == start_memory && p1[4] == *p)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4138 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4139 /* If this group ever matched anything, then restore
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4140 what its registers were before trying this last
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4141 failed match, e.g., with `(a*)*b' against `ab' for
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4142 regstart[1], and, e.g., with `((a*)*(b*)*)*'
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4143 against `aba' for regend[3].
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4144
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4145 Also restore the registers for inner groups for,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4146 e.g., `((a*)(b*))*' against `aba' (register 3 would
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4147 otherwise get trashed). */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4148
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4149 if (EVER_MATCHED_SOMETHING (reg_info[*p]))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4150 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4151 unsigned r;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4152
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4153 EVER_MATCHED_SOMETHING (reg_info[*p]) = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4154
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4155 /* Restore this and inner groups' (if any) registers. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4156 for (r = *p; r < *p + *(p + 1); r++)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4157 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4158 regstart[r] = old_regstart[r];
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4159
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4160 /* xx why this test? */
405
1aef6914aecd New version from FSF.
Jim Meyering <jim@meyering.net>
parents: 399
diff changeset
4161 if (old_regend[r] >= regstart[r])
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4162 regend[r] = old_regend[r];
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4163 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4164 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4165 p1++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4166 EXTRACT_NUMBER_AND_INCR (mcnt, p1);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4167 PUSH_FAILURE_POINT (p1 + mcnt, d, -2);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4168
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4169 goto fail;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4170 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4171 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4172
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4173 /* Move past the register number and the inner group count. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4174 p += 2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4175 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4176
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4177
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4178 /* \<digit> has been turned into a `duplicate' command which is
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4179 followed by the numeric value of <digit> as the register number. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4180 case duplicate:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4181 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4182 register const char *d2, *dend2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4183 int regno = *p++; /* Get which register to match against. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4184 DEBUG_PRINT2 ("EXECUTING duplicate %d.\n", regno);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4185
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4186 /* Can't back reference a group which we've never matched. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4187 if (REG_UNSET (regstart[regno]) || REG_UNSET (regend[regno]))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4188 goto fail;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4189
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4190 /* Where in input to try to start matching. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4191 d2 = regstart[regno];
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4192
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4193 /* Where to stop matching; if both the place to start and
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4194 the place to stop matching are in the same string, then
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4195 set to the place to stop, otherwise, for now have to use
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4196 the end of the first string. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4197
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4198 dend2 = ((FIRST_STRING_P (regstart[regno])
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4199 == FIRST_STRING_P (regend[regno]))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4200 ? regend[regno] : end_match_1);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4201 for (;;)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4202 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4203 /* If necessary, advance to next segment in register
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4204 contents. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4205 while (d2 == dend2)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4206 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4207 if (dend2 == end_match_2) break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4208 if (dend2 == regend[regno]) break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4209
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4210 /* End of string1 => advance to string2. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4211 d2 = string2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4212 dend2 = regend[regno];
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4213 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4214 /* At end of register contents => success */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4215 if (d2 == dend2) break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4216
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4217 /* If necessary, advance to next segment in data. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4218 PREFETCH ();
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4219
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4220 /* How many characters left in this segment to match. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4221 mcnt = dend - d;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4222
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4223 /* Want how many consecutive characters we can match in
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4224 one shot, so, if necessary, adjust the count. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4225 if (mcnt > dend2 - d2)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4226 mcnt = dend2 - d2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4227
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4228 /* Compare that many; failure if mismatch, else move
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4229 past them. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4230 if (translate
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4231 ? bcmp_translate (d, d2, mcnt, translate)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4232 : bcmp (d, d2, mcnt))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4233 goto fail;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4234 d += mcnt, d2 += mcnt;
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
4235
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
4236 /* Do this because we've match some characters. */
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
4237 SET_REGS_MATCHED ();
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4238 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4239 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4240 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4241
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4242
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4243 /* begline matches the empty string at the beginning of the string
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4244 (unless `not_bol' is set in `bufp'), and, if
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4245 `newline_anchor' is set, after newlines. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4246 case begline:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4247 DEBUG_PRINT1 ("EXECUTING begline.\n");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4248
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4249 if (AT_STRINGS_BEG (d))
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4250 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4251 if (!bufp->not_bol) break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4252 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4253 else if (d[-1] == '\n' && bufp->newline_anchor)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4254 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4255 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4256 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4257 /* In all other cases, we fail. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4258 goto fail;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4259
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4260
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4261 /* endline is the dual of begline. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4262 case endline:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4263 DEBUG_PRINT1 ("EXECUTING endline.\n");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4264
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4265 if (AT_STRINGS_END (d))
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4266 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4267 if (!bufp->not_eol) break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4268 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4269
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4270 /* We have to ``prefetch'' the next character. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4271 else if ((d == end1 ? *string2 : *d) == '\n'
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4272 && bufp->newline_anchor)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4273 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4274 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4275 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4276 goto fail;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4277
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4278
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4279 /* Match at the very beginning of the data. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4280 case begbuf:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4281 DEBUG_PRINT1 ("EXECUTING begbuf.\n");
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4282 if (AT_STRINGS_BEG (d))
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4283 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4284 goto fail;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4285
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4286
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4287 /* Match at the very end of the data. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4288 case endbuf:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4289 DEBUG_PRINT1 ("EXECUTING endbuf.\n");
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4290 if (AT_STRINGS_END (d))
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4291 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4292 goto fail;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4293
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4294
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4295 /* on_failure_keep_string_jump is used to optimize `.*\n'. It
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4296 pushes NULL as the value for the string on the stack. Then
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4297 `pop_failure_point' will keep the current value for the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4298 string, instead of restoring it. To see why, consider
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4299 matching `foo\nbar' against `.*\n'. The .* matches the foo;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4300 then the . fails against the \n. But the next thing we want
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4301 to do is match the \n against the \n; if we restored the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4302 string value, we would be back at the foo.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4303
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4304 Because this is used only in specific cases, we don't need to
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4305 check all the things that `on_failure_jump' does, to make
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4306 sure the right things get saved on the stack. Hence we don't
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4307 share its code. The only reason to push anything on the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4308 stack at all is that otherwise we would have to change
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4309 `anychar's code to do something besides goto fail in this
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4310 case; that seems worse than this. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4311 case on_failure_keep_string_jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4312 DEBUG_PRINT1 ("EXECUTING on_failure_keep_string_jump");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4313
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4314 EXTRACT_NUMBER_AND_INCR (mcnt, p);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4315 DEBUG_PRINT3 (" %d (to 0x%x):\n", mcnt, p + mcnt);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4316
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4317 PUSH_FAILURE_POINT (p + mcnt, NULL, -2);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4318 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4319
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4320
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4321 /* Uses of on_failure_jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4322
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4323 Each alternative starts with an on_failure_jump that points
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4324 to the beginning of the next alternative. Each alternative
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4325 except the last ends with a jump that in effect jumps past
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4326 the rest of the alternatives. (They really jump to the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4327 ending jump of the following alternative, because tensioning
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4328 these jumps is a hassle.)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4329
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4330 Repeats start with an on_failure_jump that points past both
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4331 the repetition text and either the following jump or
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4332 pop_failure_jump back to this on_failure_jump. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4333 case on_failure_jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4334 on_failure:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4335 DEBUG_PRINT1 ("EXECUTING on_failure_jump");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4336
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4337 EXTRACT_NUMBER_AND_INCR (mcnt, p);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4338 DEBUG_PRINT3 (" %d (to 0x%x)", mcnt, p + mcnt);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4339
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4340 /* If this on_failure_jump comes right before a group (i.e.,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4341 the original * applied to a group), save the information
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4342 for that group and all inner ones, so that if we fail back
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4343 to this point, the group's information will be correct.
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4344 For example, in \(a*\)*\1, we need the preceding group,
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4345 and in \(\(a*\)b*\)\2, we need the inner group. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4346
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4347 /* We can't use `p' to check ahead because we push
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4348 a failure point to `p + mcnt' after we do this. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4349 p1 = p;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4350
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4351 /* We need to skip no_op's before we look for the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4352 start_memory in case this on_failure_jump is happening as
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4353 the result of a completed succeed_n, as in \(a\)\{1,3\}b\1
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4354 against aba. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4355 while (p1 < pend && (re_opcode_t) *p1 == no_op)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4356 p1++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4357
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4358 if (p1 < pend && (re_opcode_t) *p1 == start_memory)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4359 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4360 /* We have a new highest active register now. This will
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4361 get reset at the start_memory we are about to get to,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4362 but we will have saved all the registers relevant to
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4363 this repetition op, as described above. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4364 highest_active_reg = *(p1 + 1) + *(p1 + 2);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4365 if (lowest_active_reg == NO_LOWEST_ACTIVE_REG)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4366 lowest_active_reg = *(p1 + 1);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4367 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4368
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4369 DEBUG_PRINT1 (":\n");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4370 PUSH_FAILURE_POINT (p + mcnt, d, -2);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4371 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4372
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4373
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4374 /* A smart repeat ends with `maybe_pop_jump'.
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4375 We change it to either `pop_failure_jump' or `jump'. */
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4376 case maybe_pop_jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4377 EXTRACT_NUMBER_AND_INCR (mcnt, p);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4378 DEBUG_PRINT2 ("EXECUTING maybe_pop_jump %d.\n", mcnt);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4379 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4380 register unsigned char *p2 = p;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4381
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4382 /* Compare the beginning of the repeat with what in the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4383 pattern follows its end. If we can establish that there
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4384 is nothing that they would both match, i.e., that we
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4385 would have to backtrack because of (as in, e.g., `a*a')
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4386 then we can change to pop_failure_jump, because we'll
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4387 never have to backtrack.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4388
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4389 This is not true in the case of alternatives: in
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4390 `(a|ab)*' we do need to backtrack to the `ab' alternative
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4391 (e.g., if the string was `ab'). But instead of trying to
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4392 detect that here, the alternative has put on a dummy
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4393 failure point which is what we will end up popping. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4394
103
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4395 /* Skip over open/close-group commands.
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4396 If what follows this loop is a ...+ construct,
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4397 look at what begins its body, since we will have to
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4398 match at least one of that. */
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4399 while (1)
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4400 {
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4401 if (p2 + 2 < pend
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4402 && ((re_opcode_t) *p2 == stop_memory
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4403 || (re_opcode_t) *p2 == start_memory))
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4404 p2 += 3;
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4405 else if (p2 + 6 < pend
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4406 && (re_opcode_t) *p2 == dummy_failure_jump)
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4407 p2 += 6;
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4408 else
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4409 break;
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4410 }
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4411
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4412 p1 = p + mcnt;
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4413 /* p1[0] ... p1[2] are the `on_failure_jump' corresponding
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4414 to the `maybe_finalize_jump' of this case. Examine what
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4415 follows. */
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4416
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4417 /* If we're at the end of the pattern, we can change. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4418 if (p2 == pend)
37
abf77aa551c0 merge with 1.4
Jim Meyering <jim@meyering.net>
parents: 30
diff changeset
4419 {
abf77aa551c0 merge with 1.4
Jim Meyering <jim@meyering.net>
parents: 30
diff changeset
4420 /* Consider what happens when matching ":\(.*\)"
abf77aa551c0 merge with 1.4
Jim Meyering <jim@meyering.net>
parents: 30
diff changeset
4421 against ":/". I don't really understand this code
abf77aa551c0 merge with 1.4
Jim Meyering <jim@meyering.net>
parents: 30
diff changeset
4422 yet. */
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4423 p[-3] = (unsigned char) pop_failure_jump;
37
abf77aa551c0 merge with 1.4
Jim Meyering <jim@meyering.net>
parents: 30
diff changeset
4424 DEBUG_PRINT1
abf77aa551c0 merge with 1.4
Jim Meyering <jim@meyering.net>
parents: 30
diff changeset
4425 (" End of pattern: change to `pop_failure_jump'.\n");
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4426 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4427
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4428 else if ((re_opcode_t) *p2 == exactn
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4429 || (bufp->newline_anchor && (re_opcode_t) *p2 == endline))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4430 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4431 register unsigned char c
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4432 = *p2 == (unsigned char) endline ? '\n' : p2[2];
103
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4433
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4434 if ((re_opcode_t) p1[3] == exactn && p1[5] != c)
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4435 {
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4436 p[-3] = (unsigned char) pop_failure_jump;
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4437 DEBUG_PRINT3 (" %c != %c => pop_failure_jump.\n",
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4438 c, p1[5]);
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4439 }
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4440
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4441 else if ((re_opcode_t) p1[3] == charset
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4442 || (re_opcode_t) p1[3] == charset_not)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4443 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4444 int not = (re_opcode_t) p1[3] == charset_not;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4445
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4446 if (c < (unsigned char) (p1[4] * BYTEWIDTH)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4447 && p1[5 + c / BYTEWIDTH] & (1 << (c % BYTEWIDTH)))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4448 not = !not;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4449
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4450 /* `not' is equal to 1 if c would match, which means
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4451 that we can't change to pop_failure_jump. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4452 if (!not)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4453 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4454 p[-3] = (unsigned char) pop_failure_jump;
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4455 DEBUG_PRINT1 (" No match => pop_failure_jump.\n");
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4456 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4457 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4458 }
103
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4459 else if ((re_opcode_t) *p2 == charset)
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4460 {
217
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
4461 #ifdef DEBUG
103
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4462 register unsigned char c
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4463 = *p2 == (unsigned char) endline ? '\n' : p2[2];
217
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
4464 #endif
103
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4465
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4466 if ((re_opcode_t) p1[3] == exactn
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
4467 && ! ((int) p2[1] * BYTEWIDTH > (int) p1[4]
103
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4468 && (p2[1 + p1[4] / BYTEWIDTH]
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4469 & (1 << (p1[4] % BYTEWIDTH)))))
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4470 {
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4471 p[-3] = (unsigned char) pop_failure_jump;
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4472 DEBUG_PRINT3 (" %c != %c => pop_failure_jump.\n",
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4473 c, p1[5]);
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4474 }
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4475
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4476 else if ((re_opcode_t) p1[3] == charset_not)
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4477 {
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4478 int idx;
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4479 /* We win if the charset_not inside the loop
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4480 lists every character listed in the charset after. */
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
4481 for (idx = 0; idx < (int) p2[1]; idx++)
103
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4482 if (! (p2[2 + idx] == 0
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
4483 || (idx < (int) p1[4]
103
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4484 && ((p2[2 + idx] & ~ p1[5 + idx]) == 0))))
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4485 break;
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4486
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4487 if (idx == p2[1])
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4488 {
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4489 p[-3] = (unsigned char) pop_failure_jump;
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4490 DEBUG_PRINT1 (" No match => pop_failure_jump.\n");
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4491 }
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4492 }
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4493 else if ((re_opcode_t) p1[3] == charset)
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4494 {
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4495 int idx;
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4496 /* We win if the charset inside the loop
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4497 has no overlap with the one after the loop. */
318
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
4498 for (idx = 0;
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
4499 idx < (int) p2[1] && idx < (int) p1[4];
35f07ea356c2 merge with 1.9.1g
Jim Meyering <jim@meyering.net>
parents: 218
diff changeset
4500 idx++)
103
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4501 if ((p2[2 + idx] & p1[5 + idx]) != 0)
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4502 break;
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4503
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4504 if (idx == p2[1] || idx == p1[4])
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4505 {
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4506 p[-3] = (unsigned char) pop_failure_jump;
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4507 DEBUG_PRINT1 (" No match => pop_failure_jump.\n");
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4508 }
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4509 }
9a98c3cdf12a merge with 1.8a
Jim Meyering <jim@meyering.net>
parents: 90
diff changeset
4510 }
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4511 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4512 p -= 2; /* Point at relative address again. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4513 if ((re_opcode_t) p[-1] != pop_failure_jump)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4514 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4515 p[-1] = (unsigned char) jump;
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4516 DEBUG_PRINT1 (" Match => jump.\n");
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4517 goto unconditional_jump;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4518 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4519 /* Note fall through. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4520
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4521
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4522 /* The end of a simple repeat has a pop_failure_jump back to
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4523 its matching on_failure_jump, where the latter will push a
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4524 failure point. The pop_failure_jump takes off failure
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4525 points put on by this pop_failure_jump's matching
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4526 on_failure_jump; we got through the pattern to here from the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4527 matching on_failure_jump, so didn't fail. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4528 case pop_failure_jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4529 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4530 /* We need to pass separate storage for the lowest and
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4531 highest registers, even though we don't care about the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4532 actual values. Otherwise, we will restore only one
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4533 register from the stack, since lowest will == highest in
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4534 `pop_failure_point'. */
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
4535 unsigned dummy_low_reg, dummy_high_reg;
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4536 unsigned char *pdummy;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4537 const char *sdummy;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4538
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4539 DEBUG_PRINT1 ("EXECUTING pop_failure_jump.\n");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4540 POP_FAILURE_POINT (sdummy, pdummy,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4541 dummy_low_reg, dummy_high_reg,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4542 reg_dummy, reg_dummy, reg_info_dummy);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4543 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4544 /* Note fall through. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4545
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4546
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4547 /* Unconditionally jump (without popping any failure points). */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4548 case jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4549 unconditional_jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4550 EXTRACT_NUMBER_AND_INCR (mcnt, p); /* Get the amount to jump. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4551 DEBUG_PRINT2 ("EXECUTING jump %d ", mcnt);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4552 p += mcnt; /* Do the jump. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4553 DEBUG_PRINT2 ("(to 0x%x).\n", p);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4554 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4555
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4556
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4557 /* We need this opcode so we can detect where alternatives end
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4558 in `group_match_null_string_p' et al. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4559 case jump_past_alt:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4560 DEBUG_PRINT1 ("EXECUTING jump_past_alt.\n");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4561 goto unconditional_jump;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4562
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4563
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4564 /* Normally, the on_failure_jump pushes a failure point, which
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4565 then gets popped at pop_failure_jump. We will end up at
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4566 pop_failure_jump, also, and with a pattern of, say, `a+', we
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4567 are skipping over the on_failure_jump, so we have to push
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4568 something meaningless for pop_failure_jump to pop. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4569 case dummy_failure_jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4570 DEBUG_PRINT1 ("EXECUTING dummy_failure_jump.\n");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4571 /* It doesn't matter what we push for the string here. What
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4572 the code at `fail' tests is the value for the pattern. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4573 PUSH_FAILURE_POINT (0, 0, -2);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4574 goto unconditional_jump;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4575
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4576
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4577 /* At the end of an alternative, we need to push a dummy failure
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4578 point in case we are followed by a `pop_failure_jump', because
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4579 we don't want the failure point for the alternative to be
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4580 popped. For example, matching `(a|ab)*' against `aab'
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4581 requires that we match the `ab' alternative. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4582 case push_dummy_failure:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4583 DEBUG_PRINT1 ("EXECUTING push_dummy_failure.\n");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4584 /* See comments just above at `dummy_failure_jump' about the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4585 two zeroes. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4586 PUSH_FAILURE_POINT (0, 0, -2);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4587 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4588
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4589 /* Have to succeed matching what follows at least n times.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4590 After that, handle like `on_failure_jump'. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4591 case succeed_n:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4592 EXTRACT_NUMBER (mcnt, p + 2);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4593 DEBUG_PRINT2 ("EXECUTING succeed_n %d.\n", mcnt);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4594
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4595 assert (mcnt >= 0);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4596 /* Originally, this is how many times we HAVE to succeed. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4597 if (mcnt > 0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4598 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4599 mcnt--;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4600 p += 2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4601 STORE_NUMBER_AND_INCR (p, mcnt);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4602 DEBUG_PRINT3 (" Setting 0x%x to %d.\n", p, mcnt);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4603 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4604 else if (mcnt == 0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4605 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4606 DEBUG_PRINT2 (" Setting two bytes from 0x%x to no_op.\n", p+2);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4607 p[2] = (unsigned char) no_op;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4608 p[3] = (unsigned char) no_op;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4609 goto on_failure;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4610 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4611 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4612
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4613 case jump_n:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4614 EXTRACT_NUMBER (mcnt, p + 2);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4615 DEBUG_PRINT2 ("EXECUTING jump_n %d.\n", mcnt);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4616
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4617 /* Originally, this is how many times we CAN jump. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4618 if (mcnt)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4619 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4620 mcnt--;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4621 STORE_NUMBER (p + 2, mcnt);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4622 goto unconditional_jump;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4623 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4624 /* If don't have to jump any more, skip over the rest of command. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4625 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4626 p += 4;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4627 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4628
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4629 case set_number_at:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4630 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4631 DEBUG_PRINT1 ("EXECUTING set_number_at.\n");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4632
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4633 EXTRACT_NUMBER_AND_INCR (mcnt, p);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4634 p1 = p + mcnt;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4635 EXTRACT_NUMBER_AND_INCR (mcnt, p);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4636 DEBUG_PRINT3 (" Setting 0x%x to %d.\n", p1, mcnt);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4637 STORE_NUMBER (p1, mcnt);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4638 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4639 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4640
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4641 case wordbound:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4642 DEBUG_PRINT1 ("EXECUTING wordbound.\n");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4643 if (AT_WORD_BOUNDARY (d))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4644 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4645 goto fail;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4646
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4647 case notwordbound:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4648 DEBUG_PRINT1 ("EXECUTING notwordbound.\n");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4649 if (AT_WORD_BOUNDARY (d))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4650 goto fail;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4651 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4652
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4653 case wordbeg:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4654 DEBUG_PRINT1 ("EXECUTING wordbeg.\n");
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4655 if (WORDCHAR_P (d) && (AT_STRINGS_BEG (d) || !WORDCHAR_P (d - 1)))
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4656 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4657 goto fail;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4658
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4659 case wordend:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4660 DEBUG_PRINT1 ("EXECUTING wordend.\n");
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4661 if (!AT_STRINGS_BEG (d) && WORDCHAR_P (d - 1)
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4662 && (!WORDCHAR_P (d) || AT_STRINGS_END (d)))
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4663 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4664 goto fail;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4665
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4666 #ifdef emacs
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4667 case before_dot:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4668 DEBUG_PRINT1 ("EXECUTING before_dot.\n");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4669 if (PTR_CHAR_POS ((unsigned char *) d) >= point)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4670 goto fail;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4671 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4672
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4673 case at_dot:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4674 DEBUG_PRINT1 ("EXECUTING at_dot.\n");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4675 if (PTR_CHAR_POS ((unsigned char *) d) != point)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4676 goto fail;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4677 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4678
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4679 case after_dot:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4680 DEBUG_PRINT1 ("EXECUTING after_dot.\n");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4681 if (PTR_CHAR_POS ((unsigned char *) d) <= point)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4682 goto fail;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4683 break;
217
Jim Meyering <jim@meyering.net>
parents: 198
diff changeset
4684 #if 0 /* not emacs19 */
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4685 case at_dot:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4686 DEBUG_PRINT1 ("EXECUTING at_dot.\n");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4687 if (PTR_CHAR_POS ((unsigned char *) d) + 1 != point)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4688 goto fail;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4689 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4690 #endif /* not emacs19 */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4691
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4692 case syntaxspec:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4693 DEBUG_PRINT2 ("EXECUTING syntaxspec %d.\n", mcnt);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4694 mcnt = *p++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4695 goto matchsyntax;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4696
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4697 case wordchar:
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4698 DEBUG_PRINT1 ("EXECUTING Emacs wordchar.\n");
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4699 mcnt = (int) Sword;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4700 matchsyntax:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4701 PREFETCH ();
198
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
4702 /* Can't use *d++ here; SYNTAX may be an unsafe macro. */
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
4703 d++;
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
4704 if (SYNTAX (d[-1]) != (enum syntaxcode) mcnt)
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
4705 goto fail;
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4706 SET_REGS_MATCHED ();
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4707 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4708
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4709 case notsyntaxspec:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4710 DEBUG_PRINT2 ("EXECUTING notsyntaxspec %d.\n", mcnt);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4711 mcnt = *p++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4712 goto matchnotsyntax;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4713
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4714 case notwordchar:
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4715 DEBUG_PRINT1 ("EXECUTING Emacs notwordchar.\n");
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4716 mcnt = (int) Sword;
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4717 matchnotsyntax:
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4718 PREFETCH ();
198
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
4719 /* Can't use *d++ here; SYNTAX may be an unsafe macro. */
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
4720 d++;
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
4721 if (SYNTAX (d[-1]) == (enum syntaxcode) mcnt)
5db9ec871df6 merge with 1.9.1e
Jim Meyering <jim@meyering.net>
parents: 175
diff changeset
4722 goto fail;
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4723 SET_REGS_MATCHED ();
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4724 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4725
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4726 #else /* not emacs */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4727 case wordchar:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4728 DEBUG_PRINT1 ("EXECUTING non-Emacs wordchar.\n");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4729 PREFETCH ();
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4730 if (!WORDCHAR_P (d))
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4731 goto fail;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4732 SET_REGS_MATCHED ();
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4733 d++;
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4734 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4735
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4736 case notwordchar:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4737 DEBUG_PRINT1 ("EXECUTING non-Emacs notwordchar.\n");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4738 PREFETCH ();
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4739 if (WORDCHAR_P (d))
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4740 goto fail;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4741 SET_REGS_MATCHED ();
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
4742 d++;
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4743 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4744 #endif /* not emacs */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4745
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4746 default:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4747 abort ();
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4748 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4749 continue; /* Successfully executed one pattern command; keep going. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4750
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4751
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4752 /* We goto here if a matching operation fails. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4753 fail:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4754 if (!FAIL_STACK_EMPTY ())
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4755 { /* A restart point is known. Restore to that state. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4756 DEBUG_PRINT1 ("\nFAIL:\n");
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4757 POP_FAILURE_POINT (d, p,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4758 lowest_active_reg, highest_active_reg,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4759 regstart, regend, reg_info);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4760
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4761 /* If this failure point is a dummy, try the next one. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4762 if (!p)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4763 goto fail;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4764
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4765 /* If we failed to the end of the pattern, don't examine *p. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4766 assert (p <= pend);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4767 if (p < pend)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4768 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4769 boolean is_a_jump_n = false;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4770
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4771 /* If failed to a backwards jump that's part of a repetition
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4772 loop, need to pop this failure point and use the next one. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4773 switch ((re_opcode_t) *p)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4774 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4775 case jump_n:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4776 is_a_jump_n = true;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4777 case maybe_pop_jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4778 case pop_failure_jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4779 case jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4780 p1 = p + 1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4781 EXTRACT_NUMBER_AND_INCR (mcnt, p1);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4782 p1 += mcnt;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4783
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4784 if ((is_a_jump_n && (re_opcode_t) *p1 == succeed_n)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4785 || (!is_a_jump_n
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4786 && (re_opcode_t) *p1 == on_failure_jump))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4787 goto fail;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4788 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4789 default:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4790 /* do nothing */ ;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4791 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4792 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4793
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4794 if (d >= string1 && d <= end1)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4795 dend = end_match_1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4796 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4797 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4798 break; /* Matching at this starting point really fails. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4799 } /* for (;;) */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4800
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4801 if (best_regs_set)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4802 goto restore_best_regs;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4803
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4804 FREE_VARIABLES ();
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4805
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4806 return -1; /* Failure to match. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4807 } /* re_match_2 */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4808
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4809 /* Subroutine definitions for re_match_2. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4810
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4811
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4812 /* We are passed P pointing to a register number after a start_memory.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4813
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4814 Return true if the pattern up to the corresponding stop_memory can
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4815 match the empty string, and false otherwise.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4816
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4817 If we find the matching stop_memory, sets P to point to one past its number.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4818 Otherwise, sets P to an undefined byte less than or equal to END.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4819
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4820 We don't handle duplicates properly (yet). */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4821
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4822 static boolean
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4823 group_match_null_string_p (p, end, reg_info)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4824 unsigned char **p, *end;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4825 register_info_type *reg_info;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4826 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4827 int mcnt;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4828 /* Point to after the args to the start_memory. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4829 unsigned char *p1 = *p + 2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4830
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4831 while (p1 < end)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4832 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4833 /* Skip over opcodes that can match nothing, and return true or
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4834 false, as appropriate, when we get to one that can't, or to the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4835 matching stop_memory. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4836
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4837 switch ((re_opcode_t) *p1)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4838 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4839 /* Could be either a loop or a series of alternatives. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4840 case on_failure_jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4841 p1++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4842 EXTRACT_NUMBER_AND_INCR (mcnt, p1);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4843
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4844 /* If the next operation is not a jump backwards in the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4845 pattern. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4846
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4847 if (mcnt >= 0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4848 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4849 /* Go through the on_failure_jumps of the alternatives,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4850 seeing if any of the alternatives cannot match nothing.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4851 The last alternative starts with only a jump,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4852 whereas the rest start with on_failure_jump and end
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4853 with a jump, e.g., here is the pattern for `a|b|c':
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4854
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4855 /on_failure_jump/0/6/exactn/1/a/jump_past_alt/0/6
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4856 /on_failure_jump/0/6/exactn/1/b/jump_past_alt/0/3
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4857 /exactn/1/c
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4858
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4859 So, we have to first go through the first (n-1)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4860 alternatives and then deal with the last one separately. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4861
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4862
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4863 /* Deal with the first (n-1) alternatives, which start
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4864 with an on_failure_jump (see above) that jumps to right
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4865 past a jump_past_alt. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4866
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4867 while ((re_opcode_t) p1[mcnt-3] == jump_past_alt)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4868 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4869 /* `mcnt' holds how many bytes long the alternative
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4870 is, including the ending `jump_past_alt' and
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4871 its number. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4872
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4873 if (!alt_match_null_string_p (p1, p1 + mcnt - 3,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4874 reg_info))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4875 return false;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4876
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4877 /* Move to right after this alternative, including the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4878 jump_past_alt. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4879 p1 += mcnt;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4880
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4881 /* Break if it's the beginning of an n-th alternative
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4882 that doesn't begin with an on_failure_jump. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4883 if ((re_opcode_t) *p1 != on_failure_jump)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4884 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4885
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4886 /* Still have to check that it's not an n-th
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4887 alternative that starts with an on_failure_jump. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4888 p1++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4889 EXTRACT_NUMBER_AND_INCR (mcnt, p1);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4890 if ((re_opcode_t) p1[mcnt-3] != jump_past_alt)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4891 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4892 /* Get to the beginning of the n-th alternative. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4893 p1 -= 3;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4894 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4895 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4896 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4897
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4898 /* Deal with the last alternative: go back and get number
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4899 of the `jump_past_alt' just before it. `mcnt' contains
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4900 the length of the alternative. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4901 EXTRACT_NUMBER (mcnt, p1 - 2);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4902
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4903 if (!alt_match_null_string_p (p1, p1 + mcnt, reg_info))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4904 return false;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4905
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4906 p1 += mcnt; /* Get past the n-th alternative. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4907 } /* if mcnt > 0 */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4908 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4909
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4910
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4911 case stop_memory:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4912 assert (p1[1] == **p);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4913 *p = p1 + 2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4914 return true;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4915
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4916
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4917 default:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4918 if (!common_op_match_null_string_p (&p1, end, reg_info))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4919 return false;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4920 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4921 } /* while p1 < end */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4922
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4923 return false;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4924 } /* group_match_null_string_p */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4925
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4926
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4927 /* Similar to group_match_null_string_p, but doesn't deal with alternatives:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4928 It expects P to be the first byte of a single alternative and END one
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4929 byte past the last. The alternative can contain groups. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4930
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4931 static boolean
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4932 alt_match_null_string_p (p, end, reg_info)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4933 unsigned char *p, *end;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4934 register_info_type *reg_info;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4935 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4936 int mcnt;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4937 unsigned char *p1 = p;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4938
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4939 while (p1 < end)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4940 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4941 /* Skip over opcodes that can match nothing, and break when we get
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4942 to one that can't. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4943
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4944 switch ((re_opcode_t) *p1)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4945 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4946 /* It's a loop. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4947 case on_failure_jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4948 p1++;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4949 EXTRACT_NUMBER_AND_INCR (mcnt, p1);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4950 p1 += mcnt;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4951 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4952
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4953 default:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4954 if (!common_op_match_null_string_p (&p1, end, reg_info))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4955 return false;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4956 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4957 } /* while p1 < end */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4958
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4959 return true;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4960 } /* alt_match_null_string_p */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4961
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4962
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4963 /* Deals with the ops common to group_match_null_string_p and
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4964 alt_match_null_string_p.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4965
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4966 Sets P to one after the op and its arguments, if any. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4967
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4968 static boolean
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4969 common_op_match_null_string_p (p, end, reg_info)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4970 unsigned char **p, *end;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4971 register_info_type *reg_info;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4972 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4973 int mcnt;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4974 boolean ret;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4975 int reg_no;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4976 unsigned char *p1 = *p;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4977
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4978 switch ((re_opcode_t) *p1++)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4979 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4980 case no_op:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4981 case begline:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4982 case endline:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4983 case begbuf:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4984 case endbuf:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4985 case wordbeg:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4986 case wordend:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4987 case wordbound:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4988 case notwordbound:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4989 #ifdef emacs
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4990 case before_dot:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4991 case at_dot:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4992 case after_dot:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4993 #endif
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4994 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4995
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4996 case start_memory:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4997 reg_no = *p1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4998 assert (reg_no > 0 && reg_no <= MAX_REGNUM);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4999 ret = group_match_null_string_p (&p1, end, reg_info);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5000
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5001 /* Have to set this here in case we're checking a group which
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5002 contains a group and a back reference to it. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5003
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5004 if (REG_MATCH_NULL_STRING_P (reg_info[reg_no]) == MATCH_NULL_UNSET_VALUE)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5005 REG_MATCH_NULL_STRING_P (reg_info[reg_no]) = ret;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5006
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5007 if (!ret)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5008 return false;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5009 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5010
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5011 /* If this is an optimized succeed_n for zero times, make the jump. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5012 case jump:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5013 EXTRACT_NUMBER_AND_INCR (mcnt, p1);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5014 if (mcnt >= 0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5015 p1 += mcnt;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5016 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5017 return false;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5018 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5019
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5020 case succeed_n:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5021 /* Get to the number of times to succeed. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5022 p1 += 2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5023 EXTRACT_NUMBER_AND_INCR (mcnt, p1);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5024
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5025 if (mcnt == 0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5026 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5027 p1 -= 4;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5028 EXTRACT_NUMBER_AND_INCR (mcnt, p1);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5029 p1 += mcnt;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5030 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5031 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5032 return false;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5033 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5034
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5035 case duplicate:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5036 if (!REG_MATCH_NULL_STRING_P (reg_info[*p1]))
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5037 return false;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5038 break;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5039
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5040 case set_number_at:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5041 p1 += 4;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5042
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5043 default:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5044 /* All other opcodes mean we cannot match the empty string. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5045 return false;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5046 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5047
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5048 *p = p1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5049 return true;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5050 } /* common_op_match_null_string_p */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5051
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5052
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5053 /* Return zero if TRANSLATE[S1] and TRANSLATE[S2] are identical for LEN
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5054 bytes; nonzero otherwise. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5055
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5056 static int
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5057 bcmp_translate (s1, s2, len, translate)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5058 unsigned char *s1, *s2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5059 register int len;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5060 char *translate;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5061 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5062 register unsigned char *p1 = s1, *p2 = s2;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5063 while (len)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5064 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5065 if (translate[*p1++] != translate[*p2++]) return 1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5066 len--;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5067 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5068 return 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5069 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5070
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5071 /* Entry points for GNU code. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5072
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5073 /* re_compile_pattern is the GNU regular expression compiler: it
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5074 compiles PATTERN (of length SIZE) and puts the result in BUFP.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5075 Returns 0 if the pattern was valid, otherwise an error string.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5076
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5077 Assumes the `allocated' (and perhaps `buffer') and `translate' fields
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5078 are set in BUFP on entry.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5079
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5080 We call regex_compile to do the actual compilation. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5081
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5082 const char *
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5083 re_compile_pattern (pattern, length, bufp)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5084 const char *pattern;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5085 int length;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5086 struct re_pattern_buffer *bufp;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5087 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5088 reg_errcode_t ret;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5089
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5090 /* GNU code is written to assume at least RE_NREGS registers will be set
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5091 (and at least one extra will be -1). */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5092 bufp->regs_allocated = REGS_UNALLOCATED;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5093
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5094 /* And GNU code determines whether or not to get register information
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5095 by passing null for the REGS argument to re_match, etc., not by
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5096 setting no_sub. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5097 bufp->no_sub = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5098
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5099 /* Match anchors at newline. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5100 bufp->newline_anchor = 1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5101
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5102 ret = regex_compile (pattern, length, re_syntax_options, bufp);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5103
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
5104 if (!ret)
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
5105 return NULL;
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
5106 return gettext (re_error_msgid[(int) ret]);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5107 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5108
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5109 /* Entry points compatible with 4.2 BSD regex library. We don't define
340
12f1e5ab0111 merge with 1.9.1i
Jim Meyering <jim@meyering.net>
parents: 332
diff changeset
5110 them unless specifically requested. */
12f1e5ab0111 merge with 1.9.1i
Jim Meyering <jim@meyering.net>
parents: 332
diff changeset
5111
12f1e5ab0111 merge with 1.9.1i
Jim Meyering <jim@meyering.net>
parents: 332
diff changeset
5112 #ifdef _REGEX_RE_COMP
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5113
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5114 /* BSD has one and only one pattern buffer. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5115 static struct re_pattern_buffer re_comp_buf;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5116
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5117 char *
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5118 re_comp (s)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5119 const char *s;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5120 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5121 reg_errcode_t ret;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5122
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5123 if (!s)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5124 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5125 if (!re_comp_buf.buffer)
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
5126 return gettext ("No previous regular expression");
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5127 return 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5128 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5129
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5130 if (!re_comp_buf.buffer)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5131 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5132 re_comp_buf.buffer = (unsigned char *) malloc (200);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5133 if (re_comp_buf.buffer == NULL)
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
5134 return gettext (re_error_msgid[(int) REG_ESPACE]);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5135 re_comp_buf.allocated = 200;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5136
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5137 re_comp_buf.fastmap = (char *) malloc (1 << BYTEWIDTH);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5138 if (re_comp_buf.fastmap == NULL)
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
5139 return gettext (re_error_msgid[(int) REG_ESPACE]);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5140 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5141
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5142 /* Since `re_exec' always passes NULL for the `regs' argument, we
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5143 don't need to initialize the pattern buffer fields which affect it. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5144
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5145 /* Match anchors at newlines. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5146 re_comp_buf.newline_anchor = 1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5147
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5148 ret = regex_compile (s, strlen (s), re_syntax_options, &re_comp_buf);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5149
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
5150 if (!ret)
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
5151 return NULL;
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
5152
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
5153 /* Yes, we're discarding `const' here if !HAVE_LIBINTL. */
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
5154 return (char *) gettext (re_error_msgid[(int) ret]);
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5155 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5156
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5157
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5158 int
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5159 re_exec (s)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5160 const char *s;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5161 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5162 const int len = strlen (s);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5163 return
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5164 0 <= re_search (&re_comp_buf, s, len, 0, len, (struct re_registers *) 0);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5165 }
340
12f1e5ab0111 merge with 1.9.1i
Jim Meyering <jim@meyering.net>
parents: 332
diff changeset
5166 #endif /* _REGEX_RE_COMP */
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5167
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5168 /* POSIX.2 functions. Don't define these for Emacs. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5169
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5170 #ifndef emacs
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5171
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5172 /* regcomp takes a regular expression as a string and compiles it.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5173
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5174 PREG is a regex_t *. We do not expect any fields to be initialized,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5175 since POSIX says we shouldn't. Thus, we set
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5176
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5177 `buffer' to the compiled pattern;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5178 `used' to the length of the compiled pattern;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5179 `syntax' to RE_SYNTAX_POSIX_EXTENDED if the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5180 REG_EXTENDED bit in CFLAGS is set; otherwise, to
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5181 RE_SYNTAX_POSIX_BASIC;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5182 `newline_anchor' to REG_NEWLINE being set in CFLAGS;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5183 `fastmap' and `fastmap_accurate' to zero;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5184 `re_nsub' to the number of subexpressions in PATTERN.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5185
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5186 PATTERN is the address of the pattern string.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5187
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5188 CFLAGS is a series of bits which affect compilation.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5189
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5190 If REG_EXTENDED is set, we use POSIX extended syntax; otherwise, we
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5191 use POSIX basic syntax.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5192
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5193 If REG_NEWLINE is set, then . and [^...] don't match newline.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5194 Also, regexec will try a match beginning after every newline.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5195
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5196 If REG_ICASE is set, then we considers upper- and lowercase
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5197 versions of letters to be equivalent when matching.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5198
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5199 If REG_NOSUB is set, then when PREG is passed to regexec, that
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5200 routine will report only success or failure, and nothing about the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5201 registers.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5202
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5203 It returns 0 if it succeeds, nonzero if it doesn't. (See regex.h for
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5204 the return codes and their meanings.) */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5205
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5206 int
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5207 regcomp (preg, pattern, cflags)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5208 regex_t *preg;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5209 const char *pattern;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5210 int cflags;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5211 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5212 reg_errcode_t ret;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5213 unsigned syntax
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
5214 = (cflags & REG_EXTENDED) ?
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
5215 RE_SYNTAX_POSIX_EXTENDED : RE_SYNTAX_POSIX_BASIC;
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5216
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5217 /* regex_compile will allocate the space for the compiled pattern. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5218 preg->buffer = 0;
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
5219 preg->allocated = 0;
86
bf280196c55d merge with 1.5.2
Jim Meyering <jim@meyering.net>
parents: 81
diff changeset
5220 preg->used = 0;
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5221
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5222 /* Don't bother to use a fastmap when searching. This simplifies the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5223 REG_NEWLINE case: if we used a fastmap, we'd have to put all the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5224 characters after newlines into the fastmap. This way, we just try
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5225 every character. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5226 preg->fastmap = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5227
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5228 if (cflags & REG_ICASE)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5229 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5230 unsigned i;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5231
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5232 preg->translate = (char *) malloc (CHAR_SET_SIZE);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5233 if (preg->translate == NULL)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5234 return (int) REG_ESPACE;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5235
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5236 /* Map uppercase characters to corresponding lowercase ones. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5237 for (i = 0; i < CHAR_SET_SIZE; i++)
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
5238 preg->translate[i] = ISUPPER (i) ? tolower (i) : i;
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5239 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5240 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5241 preg->translate = NULL;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5242
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5243 /* If REG_NEWLINE is set, newlines are treated differently. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5244 if (cflags & REG_NEWLINE)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5245 { /* REG_NEWLINE implies neither . nor [^...] match newline. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5246 syntax &= ~RE_DOT_NEWLINE;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5247 syntax |= RE_HAT_LISTS_NOT_NEWLINE;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5248 /* It also changes the matching behavior. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5249 preg->newline_anchor = 1;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5250 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5251 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5252 preg->newline_anchor = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5253
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5254 preg->no_sub = !!(cflags & REG_NOSUB);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5255
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5256 /* POSIX says a null character in the pattern terminates it, so we
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5257 can use strlen here in compiling the pattern. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5258 ret = regex_compile (pattern, strlen (pattern), syntax, preg);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5259
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5260 /* POSIX doesn't distinguish between an unmatched open-group and an
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5261 unmatched close-group: both are REG_EPAREN. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5262 if (ret == REG_ERPAREN) ret = REG_EPAREN;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5263
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5264 return (int) ret;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5265 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5266
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5267
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5268 /* regexec searches for a given pattern, specified by PREG, in the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5269 string STRING.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5270
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5271 If NMATCH is zero or REG_NOSUB was set in the cflags argument to
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5272 `regcomp', we ignore PMATCH. Otherwise, we assume PMATCH has at
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5273 least NMATCH elements, and we set them to the offsets of the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5274 corresponding matched substrings.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5275
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5276 EFLAGS specifies `execution flags' which affect matching: if
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5277 REG_NOTBOL is set, then ^ does not match at the beginning of the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5278 string; if REG_NOTEOL is set, then $ does not match at the end.
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5279
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5280 We return 0 if we find a match and REG_NOMATCH if not. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5281
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5282 int
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5283 regexec (preg, string, nmatch, pmatch, eflags)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5284 const regex_t *preg;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5285 const char *string;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5286 size_t nmatch;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5287 regmatch_t pmatch[];
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5288 int eflags;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5289 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5290 int ret;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5291 struct re_registers regs;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5292 regex_t private_preg;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5293 int len = strlen (string);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5294 boolean want_reg_info = !preg->no_sub && nmatch > 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5295
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5296 private_preg = *preg;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5297
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5298 private_preg.not_bol = !!(eflags & REG_NOTBOL);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5299 private_preg.not_eol = !!(eflags & REG_NOTEOL);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5300
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5301 /* The user has told us exactly how many registers to return
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5302 information about, via `nmatch'. We have to pass that on to the
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5303 matching routines. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5304 private_preg.regs_allocated = REGS_FIXED;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5305
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5306 if (want_reg_info)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5307 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5308 regs.num_regs = nmatch;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5309 regs.start = TALLOC (nmatch, regoff_t);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5310 regs.end = TALLOC (nmatch, regoff_t);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5311 if (regs.start == NULL || regs.end == NULL)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5312 return (int) REG_NOMATCH;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5313 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5314
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5315 /* Perform the searching operation. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5316 ret = re_search (&private_preg, string, len,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5317 /* start: */ 0, /* range: */ len,
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5318 want_reg_info ? &regs : (struct re_registers *) 0);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5319
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5320 /* Copy the register information to the POSIX structure. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5321 if (want_reg_info)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5322 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5323 if (ret >= 0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5324 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5325 unsigned r;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5326
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5327 for (r = 0; r < nmatch; r++)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5328 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5329 pmatch[r].rm_so = regs.start[r];
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5330 pmatch[r].rm_eo = regs.end[r];
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5331 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5332 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5333
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5334 /* If we needed the temporary register info, free the space now. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5335 free (regs.start);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5336 free (regs.end);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5337 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5338
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5339 /* We want zero return to mean success, unlike `re_search'. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5340 return ret >= 0 ? (int) REG_NOERROR : (int) REG_NOMATCH;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5341 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5342
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5343
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5344 /* Returns a message corresponding to an error code, ERRCODE, returned
30
37bbdc81e894 isascii guards for ctype.h macros
Jim Meyering <jim@meyering.net>
parents: 14
diff changeset
5345 from either regcomp or regexec. We don't use PREG here. */
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5346
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5347 size_t
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5348 regerror (errcode, preg, errbuf, errbuf_size)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5349 int errcode;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5350 const regex_t *preg;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5351 char *errbuf;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5352 size_t errbuf_size;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5353 {
37
abf77aa551c0 merge with 1.4
Jim Meyering <jim@meyering.net>
parents: 30
diff changeset
5354 const char *msg;
abf77aa551c0 merge with 1.4
Jim Meyering <jim@meyering.net>
parents: 30
diff changeset
5355 size_t msg_size;
abf77aa551c0 merge with 1.4
Jim Meyering <jim@meyering.net>
parents: 30
diff changeset
5356
abf77aa551c0 merge with 1.4
Jim Meyering <jim@meyering.net>
parents: 30
diff changeset
5357 if (errcode < 0
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
5358 || errcode >= (sizeof (re_error_msgid) / sizeof (re_error_msgid[0])))
37
abf77aa551c0 merge with 1.4
Jim Meyering <jim@meyering.net>
parents: 30
diff changeset
5359 /* Only error codes returned by the rest of the code should be passed
abf77aa551c0 merge with 1.4
Jim Meyering <jim@meyering.net>
parents: 30
diff changeset
5360 to this routine. If we are given anything else, or if other regex
abf77aa551c0 merge with 1.4
Jim Meyering <jim@meyering.net>
parents: 30
diff changeset
5361 code generates an invalid error code, then the program has a bug.
abf77aa551c0 merge with 1.4
Jim Meyering <jim@meyering.net>
parents: 30
diff changeset
5362 Dump core so we can fix it. */
abf77aa551c0 merge with 1.4
Jim Meyering <jim@meyering.net>
parents: 30
diff changeset
5363 abort ();
abf77aa551c0 merge with 1.4
Jim Meyering <jim@meyering.net>
parents: 30
diff changeset
5364
389
1abea4b3d539 update from FSF
Jim Meyering <jim@meyering.net>
parents: 340
diff changeset
5365 msg = gettext (re_error_msgid[errcode]);
80
d689538c6d85 merge with 1.4.1
Jim Meyering <jim@meyering.net>
parents: 55
diff changeset
5366
37
abf77aa551c0 merge with 1.4
Jim Meyering <jim@meyering.net>
parents: 30
diff changeset
5367 msg_size = strlen (msg) + 1; /* Includes the null. */
14
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5368
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5369 if (errbuf_size != 0)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5370 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5371 if (msg_size > errbuf_size)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5372 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5373 strncpy (errbuf, msg, errbuf_size - 1);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5374 errbuf[errbuf_size - 1] = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5375 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5376 else
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5377 strcpy (errbuf, msg);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5378 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5379
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5380 return msg_size;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5381 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5382
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5383
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5384 /* Free dynamically allocated space used by PREG. */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5385
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5386 void
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5387 regfree (preg)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5388 regex_t *preg;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5389 {
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5390 if (preg->buffer != NULL)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5391 free (preg->buffer);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5392 preg->buffer = NULL;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5393
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5394 preg->allocated = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5395 preg->used = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5396
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5397 if (preg->fastmap != NULL)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5398 free (preg->fastmap);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5399 preg->fastmap = NULL;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5400 preg->fastmap_accurate = 0;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5401
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5402 if (preg->translate != NULL)
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5403 free (preg->translate);
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5404 preg->translate = NULL;
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5405 }
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5406
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5407 #endif /* not emacs */
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5408
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5409 /*
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5410 Local variables:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5411 make-backup-files: t
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5412 version-control: t
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5413 trim-versions-without-asking: nil
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5414 End:
3eda3e12f7ba Initial revision
Jim Meyering <jim@meyering.net>
parents:
diff changeset
5415 */