Mercurial > hg > octave-nkf > gnulib-hg
annotate lib/regex.h @ 16650:8ad751eaba31
regex: allow inclusion of <regex.h> before <limits.h>
Without this patch, portable programs had to include <limits.h> before
<regex.h> if they wanted a consistent value for RE_DUP_MAX.
I ran into this problem with a test version of GNU grep on Solaris 8.
* lib/regex.h: Include <limits.h> if _REGEX_INCLUDE_LIMITS_H.
This is done conditionally so that this change can be merged
back to glibc.
* m4/regex.m4 (gl_REGEX): Define _REGEX_INCLUDE_LIMITS_H if
using the included regex.
| author | Paul Eggert <eggert@cs.ucla.edu> |
|---|---|
| date | Sat, 10 Mar 2012 12:15:44 -0800 |
| parents | bb182ee4a09d |
| children | 54b750a813cb |
| rev | line source |
|---|---|
| 14 | 1 /* Definitions for data structures and routines for the regular |
| 4020 | 2 expression library. |
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3 Copyright (C) 1985, 1989-1993, 1995-1998, 2000-2003, 2005-2012 |
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4 Free Software Foundation, Inc. |
| 4020 | 5 This file is part of the GNU C Library. |
| 1283 | 6 |
| 4020 | 7 This program is free software; you can redistribute it and/or modify |
| 8 it under the terms of the GNU General Public License as published by | |
| 9 the Free Software Foundation; either version 2, or (at your option) | |
| 10 any later version. | |
| 14 | 11 |
| 4020 | 12 This program is distributed in the hope that it will be useful, |
| 1283 | 13 but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 4020 | 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 GNU General Public License for more details. | |
| 14 | 16 |
| 4020 | 17 You should have received a copy of the GNU General Public License along |
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18 with this program; if not, see <http://www.gnu.org/licenses/>. */ |
| 14 | 19 |
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20 #ifndef _REGEX_H |
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21 #define _REGEX_H 1 |
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22 |
| 4304 | 23 #include <sys/types.h> |
| 24 | |
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25 /* Allow the use in C++ code. */ |
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26 #ifdef __cplusplus |
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27 extern "C" { |
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28 #endif |
| 14 | 29 |
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30 /* Define __USE_GNU to declare GNU extensions that violate the |
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31 POSIX name space rules. */ |
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32 #ifdef _GNU_SOURCE |
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33 # define __USE_GNU 1 |
| 6099 | 34 #endif |
| 389 | 35 |
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36 #ifdef _REGEX_LARGE_OFFSETS |
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37 |
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38 /* Use types and values that are wide enough to represent signed and |
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39 unsigned byte offsets in memory. This currently works only when |
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40 the regex code is used outside of the GNU C library; it is not yet |
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41 supported within glibc itself, and glibc users should not define |
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42 _REGEX_LARGE_OFFSETS. */ |
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43 |
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44 /* The type of nonnegative object indexes. Traditionally, GNU regex |
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45 uses 'int' for these. Code that uses __re_idx_t should work |
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46 regardless of whether the type is signed. */ |
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47 typedef size_t __re_idx_t; |
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48 |
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49 /* The type of object sizes. */ |
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50 typedef size_t __re_size_t; |
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51 |
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52 /* The type of object sizes, in places where the traditional code |
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53 uses unsigned long int. */ |
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54 typedef size_t __re_long_size_t; |
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55 |
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56 #else |
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57 |
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58 /* The traditional GNU regex implementation mishandles strings longer |
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59 than INT_MAX. */ |
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60 typedef int __re_idx_t; |
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61 typedef unsigned int __re_size_t; |
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62 typedef unsigned long int __re_long_size_t; |
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63 |
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64 #endif |
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65 |
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66 /* The following two types have to be signed and unsigned integer type |
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67 wide enough to hold a value of a pointer. For most ANSI compilers |
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68 ptrdiff_t and size_t should be likely OK. Still size of these two |
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69 types is 2 for Microsoft C. Ugh... */ |
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70 typedef long int s_reg_t; |
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71 typedef unsigned long int active_reg_t; |
| 14 | 72 |
| 73 /* The following bits are used to determine the regexp syntax we | |
| 74 recognize. The set/not-set meanings are chosen so that Emacs syntax | |
| 75 remains the value 0. The bits are given in alphabetical order, and | |
| 76 the definitions shifted by one from the previous bit; thus, when we | |
| 77 add or remove a bit, only one other definition need change. */ | |
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78 typedef unsigned long int reg_syntax_t; |
| 14 | 79 |
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80 #ifdef __USE_GNU |
| 14 | 81 /* If this bit is not set, then \ inside a bracket expression is literal. |
| 82 If set, then such a \ quotes the following character. */ | |
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83 # define RE_BACKSLASH_ESCAPE_IN_LISTS ((unsigned long int) 1) |
| 14 | 84 |
| 85 /* If this bit is not set, then + and ? are operators, and \+ and \? are | |
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86 literals. |
| 14 | 87 If set, then \+ and \? are operators and + and ? are literals. */ |
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88 # define RE_BK_PLUS_QM (RE_BACKSLASH_ESCAPE_IN_LISTS << 1) |
| 14 | 89 |
| 90 /* If this bit is set, then character classes are supported. They are: | |
| 91 [:alpha:], [:upper:], [:lower:], [:digit:], [:alnum:], [:xdigit:], | |
| 92 [:space:], [:print:], [:punct:], [:graph:], and [:cntrl:]. | |
| 93 If not set, then character classes are not supported. */ | |
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94 # define RE_CHAR_CLASSES (RE_BK_PLUS_QM << 1) |
| 14 | 95 |
| 96 /* If this bit is set, then ^ and $ are always anchors (outside bracket | |
| 97 expressions, of course). | |
| 98 If this bit is not set, then it depends: | |
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99 ^ is an anchor if it is at the beginning of a regular |
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100 expression or after an open-group or an alternation operator; |
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101 $ is an anchor if it is at the end of a regular expression, or |
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102 before a close-group or an alternation operator. |
| 14 | 103 |
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104 This bit could be (re)combined with RE_CONTEXT_INDEP_OPS, because |
| 14 | 105 POSIX draft 11.2 says that * etc. in leading positions is undefined. |
| 106 We already implemented a previous draft which made those constructs | |
| 107 invalid, though, so we haven't changed the code back. */ | |
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108 # define RE_CONTEXT_INDEP_ANCHORS (RE_CHAR_CLASSES << 1) |
| 14 | 109 |
| 110 /* If this bit is set, then special characters are always special | |
| 111 regardless of where they are in the pattern. | |
| 112 If this bit is not set, then special characters are special only in | |
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113 some contexts; otherwise they are ordinary. Specifically, |
| 14 | 114 * + ? and intervals are only special when not after the beginning, |
| 115 open-group, or alternation operator. */ | |
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116 # define RE_CONTEXT_INDEP_OPS (RE_CONTEXT_INDEP_ANCHORS << 1) |
| 14 | 117 |
| 118 /* If this bit is set, then *, +, ?, and { cannot be first in an re or | |
| 119 immediately after an alternation or begin-group operator. */ | |
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120 # define RE_CONTEXT_INVALID_OPS (RE_CONTEXT_INDEP_OPS << 1) |
| 14 | 121 |
| 122 /* If this bit is set, then . matches newline. | |
| 123 If not set, then it doesn't. */ | |
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124 # define RE_DOT_NEWLINE (RE_CONTEXT_INVALID_OPS << 1) |
| 14 | 125 |
| 126 /* If this bit is set, then . doesn't match NUL. | |
| 127 If not set, then it does. */ | |
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128 # define RE_DOT_NOT_NULL (RE_DOT_NEWLINE << 1) |
| 14 | 129 |
| 130 /* If this bit is set, nonmatching lists [^...] do not match newline. | |
| 131 If not set, they do. */ | |
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132 # define RE_HAT_LISTS_NOT_NEWLINE (RE_DOT_NOT_NULL << 1) |
| 14 | 133 |
| 134 /* If this bit is set, either \{...\} or {...} defines an | |
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135 interval, depending on RE_NO_BK_BRACES. |
| 14 | 136 If not set, \{, \}, {, and } are literals. */ |
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137 # define RE_INTERVALS (RE_HAT_LISTS_NOT_NEWLINE << 1) |
| 14 | 138 |
| 139 /* If this bit is set, +, ? and | aren't recognized as operators. | |
| 140 If not set, they are. */ | |
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141 # define RE_LIMITED_OPS (RE_INTERVALS << 1) |
| 14 | 142 |
| 143 /* If this bit is set, newline is an alternation operator. | |
| 144 If not set, newline is literal. */ | |
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145 # define RE_NEWLINE_ALT (RE_LIMITED_OPS << 1) |
| 14 | 146 |
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147 /* If this bit is set, then '{...}' defines an interval, and \{ and \} |
| 14 | 148 are literals. |
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149 If not set, then '\{...\}' defines an interval. */ |
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150 # define RE_NO_BK_BRACES (RE_NEWLINE_ALT << 1) |
| 14 | 151 |
| 152 /* If this bit is set, (...) defines a group, and \( and \) are literals. | |
| 153 If not set, \(...\) defines a group, and ( and ) are literals. */ | |
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154 # define RE_NO_BK_PARENS (RE_NO_BK_BRACES << 1) |
| 14 | 155 |
| 156 /* If this bit is set, then \<digit> matches <digit>. | |
| 157 If not set, then \<digit> is a back-reference. */ | |
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158 # define RE_NO_BK_REFS (RE_NO_BK_PARENS << 1) |
| 14 | 159 |
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160 /* If this bit is set, then | is an alternation operator, and \| is literal. |
| 14 | 161 If not set, then \| is an alternation operator, and | is literal. */ |
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162 # define RE_NO_BK_VBAR (RE_NO_BK_REFS << 1) |
| 14 | 163 |
| 164 /* If this bit is set, then an ending range point collating higher | |
| 165 than the starting range point, as in [z-a], is invalid. | |
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166 If not set, then when ending range point collates higher than the |
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167 starting range point, the range is ignored. */ |
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168 # define RE_NO_EMPTY_RANGES (RE_NO_BK_VBAR << 1) |
| 14 | 169 |
| 170 /* If this bit is set, then an unmatched ) is ordinary. | |
| 171 If not set, then an unmatched ) is invalid. */ | |
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172 # define RE_UNMATCHED_RIGHT_PAREN_ORD (RE_NO_EMPTY_RANGES << 1) |
| 14 | 173 |
| 389 | 174 /* If this bit is set, succeed as soon as we match the whole pattern, |
| 175 without further backtracking. */ | |
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176 # define RE_NO_POSIX_BACKTRACKING (RE_UNMATCHED_RIGHT_PAREN_ORD << 1) |
| 389 | 177 |
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178 /* If this bit is set, do not process the GNU regex operators. |
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179 If not set, then the GNU regex operators are recognized. */ |
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180 # define RE_NO_GNU_OPS (RE_NO_POSIX_BACKTRACKING << 1) |
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181 |
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182 /* If this bit is set, turn on internal regex debugging. |
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183 If not set, and debugging was on, turn it off. |
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184 This only works if regex.c is compiled -DDEBUG. |
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185 We define this bit always, so that all that's needed to turn on |
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186 debugging is to recompile regex.c; the calling code can always have |
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187 this bit set, and it won't affect anything in the normal case. */ |
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188 # define RE_DEBUG (RE_NO_GNU_OPS << 1) |
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189 |
| 3227 | 190 /* If this bit is set, a syntactically invalid interval is treated as |
| 191 a string of ordinary characters. For example, the ERE 'a{1' is | |
| 192 treated as 'a\{1'. */ | |
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193 # define RE_INVALID_INTERVAL_ORD (RE_DEBUG << 1) |
| 3227 | 194 |
| 4020 | 195 /* If this bit is set, then ignore case when matching. |
| 196 If not set, then case is significant. */ | |
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197 # define RE_ICASE (RE_INVALID_INTERVAL_ORD << 1) |
| 4020 | 198 |
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199 /* This bit is used internally like RE_CONTEXT_INDEP_ANCHORS but only |
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200 for ^, because it is difficult to scan the regex backwards to find |
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201 whether ^ should be special. */ |
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202 # define RE_CARET_ANCHORS_HERE (RE_ICASE << 1) |
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203 |
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204 /* If this bit is set, then \{ cannot be first in a regex or |
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205 immediately after an alternation, open-group or \} operator. */ |
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206 # define RE_CONTEXT_INVALID_DUP (RE_CARET_ANCHORS_HERE << 1) |
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207 |
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208 /* If this bit is set, then no_sub will be set to 1 during |
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209 re_compile_pattern. */ |
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210 # define RE_NO_SUB (RE_CONTEXT_INVALID_DUP << 1) |
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211 #endif |
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212 |
| 14 | 213 /* This global variable defines the particular regexp syntax to use (for |
| 214 some interfaces). When a regexp is compiled, the syntax used is | |
| 215 stored in the pattern buffer, so changing this does not affect | |
| 216 already-compiled regexps. */ | |
| 217 extern reg_syntax_t re_syntax_options; | |
| 218 | |
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219 #ifdef __USE_GNU |
| 14 | 220 /* Define combinations of the above bits for the standard possibilities. |
| 221 (The [[[ comments delimit what gets put into the Texinfo file, so | |
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222 don't delete them!) */ |
| 14 | 223 /* [[[begin syntaxes]]] */ |
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224 # define RE_SYNTAX_EMACS 0 |
| 14 | 225 |
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226 # define RE_SYNTAX_AWK \ |
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227 (RE_BACKSLASH_ESCAPE_IN_LISTS | RE_DOT_NOT_NULL \ |
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228 | RE_NO_BK_PARENS | RE_NO_BK_REFS \ |
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229 | RE_NO_BK_VBAR | RE_NO_EMPTY_RANGES \ |
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230 | RE_DOT_NEWLINE | RE_CONTEXT_INDEP_ANCHORS \ |
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231 | RE_CHAR_CLASSES \ |
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232 | RE_UNMATCHED_RIGHT_PAREN_ORD | RE_NO_GNU_OPS) |
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233 |
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234 # define RE_SYNTAX_GNU_AWK \ |
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235 ((RE_SYNTAX_POSIX_EXTENDED | RE_BACKSLASH_ESCAPE_IN_LISTS \ |
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236 | RE_INVALID_INTERVAL_ORD) \ |
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237 & ~(RE_DOT_NOT_NULL | RE_CONTEXT_INDEP_OPS \ |
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238 | RE_CONTEXT_INVALID_OPS )) |
| 14 | 239 |
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240 # define RE_SYNTAX_POSIX_AWK \ |
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241 (RE_SYNTAX_POSIX_EXTENDED | RE_BACKSLASH_ESCAPE_IN_LISTS \ |
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242 | RE_INTERVALS | RE_NO_GNU_OPS \ |
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243 | RE_INVALID_INTERVAL_ORD) |
| 14 | 244 |
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245 # define RE_SYNTAX_GREP \ |
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246 (RE_BK_PLUS_QM | RE_CHAR_CLASSES \ |
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247 | RE_HAT_LISTS_NOT_NEWLINE | RE_INTERVALS \ |
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248 | RE_NEWLINE_ALT) |
| 14 | 249 |
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250 # define RE_SYNTAX_EGREP \ |
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251 (RE_CHAR_CLASSES | RE_CONTEXT_INDEP_ANCHORS \ |
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252 | RE_CONTEXT_INDEP_OPS | RE_HAT_LISTS_NOT_NEWLINE \ |
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253 | RE_NEWLINE_ALT | RE_NO_BK_PARENS \ |
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254 | RE_NO_BK_VBAR) |
| 14 | 255 |
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256 # define RE_SYNTAX_POSIX_EGREP \ |
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257 (RE_SYNTAX_EGREP | RE_INTERVALS | RE_NO_BK_BRACES \ |
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258 | RE_INVALID_INTERVAL_ORD) |
| 14 | 259 |
| 389 | 260 /* P1003.2/D11.2, section 4.20.7.1, lines 5078ff. */ |
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261 # define RE_SYNTAX_ED RE_SYNTAX_POSIX_BASIC |
| 389 | 262 |
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263 # define RE_SYNTAX_SED RE_SYNTAX_POSIX_BASIC |
| 14 | 264 |
| 265 /* Syntax bits common to both basic and extended POSIX regex syntax. */ | |
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266 # define _RE_SYNTAX_POSIX_COMMON \ |
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267 (RE_CHAR_CLASSES | RE_DOT_NEWLINE | RE_DOT_NOT_NULL \ |
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268 | RE_INTERVALS | RE_NO_EMPTY_RANGES) |
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269 |
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270 # define RE_SYNTAX_POSIX_BASIC \ |
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271 (_RE_SYNTAX_POSIX_COMMON | RE_BK_PLUS_QM | RE_CONTEXT_INVALID_DUP) |
| 14 | 272 |
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273 /* Differs from ..._POSIX_BASIC only in that RE_BK_PLUS_QM becomes |
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274 RE_LIMITED_OPS, i.e., \? \+ \| are not recognized. Actually, this |
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275 isn't minimal, since other operators, such as \`, aren't disabled. */ |
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276 # define RE_SYNTAX_POSIX_MINIMAL_BASIC \ |
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277 (_RE_SYNTAX_POSIX_COMMON | RE_LIMITED_OPS) |
| 14 | 278 |
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279 # define RE_SYNTAX_POSIX_EXTENDED \ |
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280 (_RE_SYNTAX_POSIX_COMMON | RE_CONTEXT_INDEP_ANCHORS \ |
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281 | RE_CONTEXT_INDEP_OPS | RE_NO_BK_BRACES \ |
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282 | RE_NO_BK_PARENS | RE_NO_BK_VBAR \ |
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283 | RE_CONTEXT_INVALID_OPS | RE_UNMATCHED_RIGHT_PAREN_ORD) |
| 14 | 284 |
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285 /* Differs from ..._POSIX_EXTENDED in that RE_CONTEXT_INDEP_OPS is |
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286 removed and RE_NO_BK_REFS is added. */ |
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287 # define RE_SYNTAX_POSIX_MINIMAL_EXTENDED \ |
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288 (_RE_SYNTAX_POSIX_COMMON | RE_CONTEXT_INDEP_ANCHORS \ |
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289 | RE_CONTEXT_INVALID_OPS | RE_NO_BK_BRACES \ |
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290 | RE_NO_BK_PARENS | RE_NO_BK_REFS \ |
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291 | RE_NO_BK_VBAR | RE_UNMATCHED_RIGHT_PAREN_ORD) |
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292 /* [[[end syntaxes]]] */ |
| 14 | 293 |
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294 /* Maximum number of duplicates an interval can allow. POSIX-conforming |
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295 systems might define this in <limits.h>, but we want our |
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296 value, so remove any previous define. */ |
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297 # ifdef _REGEX_INCLUDE_LIMITS_H |
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298 # include <limits.h> |
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299 # endif |
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300 # ifdef RE_DUP_MAX |
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301 # undef RE_DUP_MAX |
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302 # endif |
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303 |
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304 /* RE_DUP_MAX is 2**15 - 1 because an earlier implementation stored |
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305 the counter as a 2-byte signed integer. This is no longer true, so |
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306 RE_DUP_MAX could be increased to (INT_MAX / 10 - 1), or to |
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307 ((SIZE_MAX - 2) / 10 - 1) if _REGEX_LARGE_OFFSETS is defined. |
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308 However, there would be a huge performance problem if someone |
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309 actually used a pattern like a\{214748363\}, so RE_DUP_MAX retains |
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310 its historical value. */ |
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311 # define RE_DUP_MAX (0x7fff) |
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312 #endif |
| 14 | 313 |
| 314 | |
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315 /* POSIX 'cflags' bits (i.e., information for 'regcomp'). */ |
| 14 | 316 |
| 317 /* If this bit is set, then use extended regular expression syntax. | |
| 318 If not set, then use basic regular expression syntax. */ | |
| 319 #define REG_EXTENDED 1 | |
| 320 | |
| 321 /* If this bit is set, then ignore case when matching. | |
| 322 If not set, then case is significant. */ | |
| 6099 | 323 #define REG_ICASE (1 << 1) |
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324 |
| 14 | 325 /* If this bit is set, then anchors do not match at newline |
| 326 characters in the string. | |
| 327 If not set, then anchors do match at newlines. */ | |
| 6099 | 328 #define REG_NEWLINE (1 << 2) |
| 14 | 329 |
| 330 /* If this bit is set, then report only success or fail in regexec. | |
| 331 If not set, then returns differ between not matching and errors. */ | |
| 6099 | 332 #define REG_NOSUB (1 << 3) |
| 14 | 333 |
| 334 | |
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335 /* POSIX 'eflags' bits (i.e., information for regexec). */ |
| 14 | 336 |
| 337 /* If this bit is set, then the beginning-of-line operator doesn't match | |
| 338 the beginning of the string (presumably because it's not the | |
| 339 beginning of a line). | |
| 340 If not set, then the beginning-of-line operator does match the | |
| 341 beginning of the string. */ | |
| 342 #define REG_NOTBOL 1 | |
| 343 | |
| 344 /* Like REG_NOTBOL, except for the end-of-line. */ | |
| 345 #define REG_NOTEOL (1 << 1) | |
| 346 | |
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347 /* Use PMATCH[0] to delimit the start and end of the search in the |
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348 buffer. */ |
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349 #define REG_STARTEND (1 << 2) |
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350 |
| 14 | 351 |
| 352 /* If any error codes are removed, changed, or added, update the | |
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353 '__re_error_msgid' table in regcomp.c. */ |
| 6099 | 354 |
| 14 | 355 typedef enum |
| 356 { | |
| 6099 | 357 _REG_ENOSYS = -1, /* This will never happen for this implementation. */ |
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358 _REG_NOERROR = 0, /* Success. */ |
| 6099 | 359 _REG_NOMATCH, /* Didn't find a match (for regexec). */ |
| 14 | 360 |
| 361 /* POSIX regcomp return error codes. (In the order listed in the | |
| 362 standard.) */ | |
| 6099 | 363 _REG_BADPAT, /* Invalid pattern. */ |
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364 _REG_ECOLLATE, /* Invalid collating element. */ |
| 6099 | 365 _REG_ECTYPE, /* Invalid character class name. */ |
| 366 _REG_EESCAPE, /* Trailing backslash. */ | |
| 367 _REG_ESUBREG, /* Invalid back reference. */ | |
| 368 _REG_EBRACK, /* Unmatched left bracket. */ | |
| 369 _REG_EPAREN, /* Parenthesis imbalance. */ | |
| 370 _REG_EBRACE, /* Unmatched \{. */ | |
| 371 _REG_BADBR, /* Invalid contents of \{\}. */ | |
| 372 _REG_ERANGE, /* Invalid range end. */ | |
| 373 _REG_ESPACE, /* Ran out of memory. */ | |
| 374 _REG_BADRPT, /* No preceding re for repetition op. */ | |
| 14 | 375 |
| 376 /* Error codes we've added. */ | |
| 6099 | 377 _REG_EEND, /* Premature end. */ |
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378 _REG_ESIZE, /* Compiled pattern bigger than 2^16 bytes. */ |
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379 _REG_ERPAREN /* Unmatched ) or \); not returned from regcomp. */ |
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380 } reg_errcode_t; |
| 6099 | 381 |
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382 #if defined _XOPEN_SOURCE || defined __USE_XOPEN2K |
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383 # define REG_ENOSYS _REG_ENOSYS |
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384 #endif |
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385 #define REG_NOERROR _REG_NOERROR |
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386 #define REG_NOMATCH _REG_NOMATCH |
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387 #define REG_BADPAT _REG_BADPAT |
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388 #define REG_ECOLLATE _REG_ECOLLATE |
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389 #define REG_ECTYPE _REG_ECTYPE |
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390 #define REG_EESCAPE _REG_EESCAPE |
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391 #define REG_ESUBREG _REG_ESUBREG |
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392 #define REG_EBRACK _REG_EBRACK |
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393 #define REG_EPAREN _REG_EPAREN |
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394 #define REG_EBRACE _REG_EBRACE |
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395 #define REG_BADBR _REG_BADBR |
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396 #define REG_ERANGE _REG_ERANGE |
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397 #define REG_ESPACE _REG_ESPACE |
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398 #define REG_BADRPT _REG_BADRPT |
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399 #define REG_EEND _REG_EEND |
| 6099 | 400 #define REG_ESIZE _REG_ESIZE |
| 401 #define REG_ERPAREN _REG_ERPAREN | |
| 14 | 402 |
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403 /* This data structure represents a compiled pattern. Before calling |
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404 the pattern compiler, the fields 'buffer', 'allocated', 'fastmap', |
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405 and 'translate' can be set. After the pattern has been compiled, |
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406 the fields 're_nsub', 'not_bol' and 'not_eol' are available. All |
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407 other fields are private to the regex routines. */ |
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408 |
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409 #ifndef RE_TRANSLATE_TYPE |
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410 # define __RE_TRANSLATE_TYPE unsigned char * |
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411 # ifdef __USE_GNU |
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412 # define RE_TRANSLATE_TYPE __RE_TRANSLATE_TYPE |
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413 # endif |
| 6099 | 414 #endif |
| 415 | |
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416 #ifdef __USE_GNU |
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417 # define __REPB_PREFIX(name) name |
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418 #else |
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419 # define __REPB_PREFIX(name) __##name |
| 6099 | 420 #endif |
| 421 | |
| 14 | 422 struct re_pattern_buffer |
| 423 { | |
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424 /* Space that holds the compiled pattern. It is declared as |
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425 'unsigned char *' because its elements are sometimes used as |
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426 array indexes. */ |
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427 unsigned char *__REPB_PREFIX(buffer); |
| 14 | 428 |
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429 /* Number of bytes to which 'buffer' points. */ |
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430 __re_long_size_t __REPB_PREFIX(allocated); |
| 14 | 431 |
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432 /* Number of bytes actually used in 'buffer'. */ |
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433 __re_long_size_t __REPB_PREFIX(used); |
| 14 | 434 |
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435 /* Syntax setting with which the pattern was compiled. */ |
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436 reg_syntax_t __REPB_PREFIX(syntax); |
| 14 | 437 |
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438 /* Pointer to a fastmap, if any, otherwise zero. re_search uses the |
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439 fastmap, if there is one, to skip over impossible starting points |
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440 for matches. */ |
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441 char *__REPB_PREFIX(fastmap); |
| 14 | 442 |
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443 /* Either a translate table to apply to all characters before |
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444 comparing them, or zero for no translation. The translation is |
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445 applied to a pattern when it is compiled and to a string when it |
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446 is matched. */ |
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447 __RE_TRANSLATE_TYPE __REPB_PREFIX(translate); |
| 14 | 448 |
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449 /* Number of subexpressions found by the compiler. */ |
| 14 | 450 size_t re_nsub; |
| 451 | |
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452 /* Zero if this pattern cannot match the empty string, one else. |
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453 Well, in truth it's used only in 're_search_2', to see whether or |
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454 not we should use the fastmap, so we don't set this absolutely |
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455 perfectly; see 're_compile_fastmap' (the "duplicate" case). */ |
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456 unsigned __REPB_PREFIX(can_be_null) : 1; |
| 14 | 457 |
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458 /* If REGS_UNALLOCATED, allocate space in the 'regs' structure |
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459 for 'max (RE_NREGS, re_nsub + 1)' groups. |
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460 If REGS_REALLOCATE, reallocate space if necessary. |
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461 If REGS_FIXED, use what's there. */ |
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462 #ifdef __USE_GNU |
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463 # define REGS_UNALLOCATED 0 |
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464 # define REGS_REALLOCATE 1 |
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465 # define REGS_FIXED 2 |
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466 #endif |
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467 unsigned __REPB_PREFIX(regs_allocated) : 2; |
| 14 | 468 |
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469 /* Set to zero when 're_compile_pattern' compiles a pattern; set to |
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470 one by 're_compile_fastmap' if it updates the fastmap. */ |
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471 unsigned __REPB_PREFIX(fastmap_accurate) : 1; |
| 14 | 472 |
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473 /* If set, 're_match_2' does not return information about |
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474 subexpressions. */ |
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475 unsigned __REPB_PREFIX(no_sub) : 1; |
| 14 | 476 |
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477 /* If set, a beginning-of-line anchor doesn't match at the beginning |
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478 of the string. */ |
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479 unsigned __REPB_PREFIX(not_bol) : 1; |
| 14 | 480 |
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481 /* Similarly for an end-of-line anchor. */ |
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482 unsigned __REPB_PREFIX(not_eol) : 1; |
| 14 | 483 |
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484 /* If true, an anchor at a newline matches. */ |
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485 unsigned __REPB_PREFIX(newline_anchor) : 1; |
| 14 | 486 }; |
| 487 | |
| 488 typedef struct re_pattern_buffer regex_t; | |
| 489 | |
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490 /* Type for byte offsets within the string. POSIX mandates this. */ |
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491 #ifdef _REGEX_LARGE_OFFSETS |
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492 /* POSIX 1003.1-2008 requires that regoff_t be at least as wide as |
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493 ptrdiff_t and ssize_t. We don't know of any hosts where ptrdiff_t |
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494 is wider than ssize_t, so ssize_t is safe. */ |
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495 typedef ssize_t regoff_t; |
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496 #else |
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497 /* The traditional GNU regex implementation mishandles strings longer |
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498 than INT_MAX. */ |
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499 typedef int regoff_t; |
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500 #endif |
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501 |
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502 |
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503 #ifdef __USE_GNU |
| 14 | 504 /* This is the structure we store register match data in. See |
| 505 regex.texinfo for a full description of what registers match. */ | |
| 506 struct re_registers | |
| 507 { | |
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508 __re_size_t num_regs; |
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509 regoff_t *start; |
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510 regoff_t *end; |
| 14 | 511 }; |
| 512 | |
| 513 | |
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514 /* If 'regs_allocated' is REGS_UNALLOCATED in the pattern buffer, |
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515 're_match_2' returns information about at least this many registers |
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516 the first time a 'regs' structure is passed. */ |
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517 # ifndef RE_NREGS |
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518 # define RE_NREGS 30 |
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519 # endif |
| 14 | 520 #endif |
| 521 | |
| 522 | |
| 523 /* POSIX specification for registers. Aside from the different names than | |
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524 're_registers', POSIX uses an array of structures, instead of a |
| 14 | 525 structure of arrays. */ |
| 526 typedef struct | |
| 527 { | |
| 528 regoff_t rm_so; /* Byte offset from string's start to substring's start. */ | |
| 529 regoff_t rm_eo; /* Byte offset from string's start to substring's end. */ | |
| 530 } regmatch_t; | |
| 531 | |
| 532 /* Declarations for routines. */ | |
| 533 | |
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534 #ifdef __USE_GNU |
| 14 | 535 /* Sets the current default syntax to SYNTAX, and return the old syntax. |
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536 You can also simply assign to the 're_syntax_options' variable. */ |
| 6099 | 537 extern reg_syntax_t re_set_syntax (reg_syntax_t __syntax); |
| 14 | 538 |
| 539 /* Compile the regular expression PATTERN, with length LENGTH | |
|
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540 and syntax given by the global 're_syntax_options', into the buffer |
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541 BUFFER. Return NULL if successful, and an error string if not. |
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542 |
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543 To free the allocated storage, you must call 'regfree' on BUFFER. |
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544 Note that the translate table must either have been initialised by |
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545 'regcomp', with a malloc'ed value, or set to NULL before calling |
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546 'regfree'. */ |
| 6099 | 547 extern const char *re_compile_pattern (const char *__pattern, size_t __length, |
| 548 struct re_pattern_buffer *__buffer); | |
| 14 | 549 |
| 550 | |
| 551 /* Compile a fastmap for the compiled pattern in BUFFER; used to | |
| 552 accelerate searches. Return 0 if successful and -2 if was an | |
| 553 internal error. */ | |
| 6099 | 554 extern int re_compile_fastmap (struct re_pattern_buffer *__buffer); |
| 14 | 555 |
| 556 | |
| 557 /* Search in the string STRING (with length LENGTH) for the pattern | |
| 558 compiled into BUFFER. Start searching at position START, for RANGE | |
| 559 characters. Return the starting position of the match, -1 for no | |
| 560 match, or -2 for an internal error. Also return register | |
|
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561 information in REGS (if REGS and BUFFER->no_sub are nonzero). */ |
|
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562 extern regoff_t re_search (struct re_pattern_buffer *__buffer, |
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563 const char *__string, __re_idx_t __length, |
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564 __re_idx_t __start, regoff_t __range, |
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565 struct re_registers *__regs); |
| 14 | 566 |
| 567 | |
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568 /* Like 're_search', but search in the concatenation of STRING1 and |
| 14 | 569 STRING2. Also, stop searching at index START + STOP. */ |
|
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570 extern regoff_t re_search_2 (struct re_pattern_buffer *__buffer, |
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571 const char *__string1, __re_idx_t __length1, |
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572 const char *__string2, __re_idx_t __length2, |
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573 __re_idx_t __start, regoff_t __range, |
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574 struct re_registers *__regs, |
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575 __re_idx_t __stop); |
| 14 | 576 |
| 577 | |
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578 /* Like 're_search', but return how many characters in STRING the regexp |
| 14 | 579 in BUFFER matched, starting at position START. */ |
|
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580 extern regoff_t re_match (struct re_pattern_buffer *__buffer, |
|
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581 const char *__string, __re_idx_t __length, |
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582 __re_idx_t __start, struct re_registers *__regs); |
| 14 | 583 |
| 584 | |
|
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|
585 /* Relates to 're_match' as 're_search_2' relates to 're_search'. */ |
|
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586 extern regoff_t re_match_2 (struct re_pattern_buffer *__buffer, |
|
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587 const char *__string1, __re_idx_t __length1, |
|
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588 const char *__string2, __re_idx_t __length2, |
|
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589 __re_idx_t __start, struct re_registers *__regs, |
|
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|
590 __re_idx_t __stop); |
| 14 | 591 |
| 592 | |
| 593 /* Set REGS to hold NUM_REGS registers, storing them in STARTS and | |
| 594 ENDS. Subsequent matches using BUFFER and REGS will use this memory | |
| 595 for recording register information. STARTS and ENDS must be | |
|
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|
596 allocated with malloc, and must each be at least 'NUM_REGS * sizeof |
| 14 | 597 (regoff_t)' bytes long. |
| 598 | |
| 599 If NUM_REGS == 0, then subsequent matches should allocate their own | |
| 600 register data. | |
| 601 | |
| 602 Unless this function is called, the first search or match using | |
|
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603 BUFFER will allocate its own register data, without |
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604 freeing the old data. */ |
| 6099 | 605 extern void re_set_registers (struct re_pattern_buffer *__buffer, |
| 606 struct re_registers *__regs, | |
|
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|
607 __re_size_t __num_regs, |
| 6099 | 608 regoff_t *__starts, regoff_t *__ends); |
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609 #endif /* Use GNU */ |
| 14 | 610 |
|
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611 #if defined _REGEX_RE_COMP || (defined _LIBC && defined __USE_BSD) |
| 1283 | 612 # ifndef _CRAY |
| 14 | 613 /* 4.2 bsd compatibility. */ |
|
6076
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* config/srclist.txt: Add glibc bugs 1220, 1221, 1222.
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|
614 extern char *re_comp (const char *); |
|
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615 extern int re_exec (const char *); |
| 1283 | 616 # endif |
|
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|
617 #endif |
| 14 | 618 |
| 2927 | 619 /* GCC 2.95 and later have "__restrict"; C99 compilers have |
|
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|
620 "restrict", and "configure" may have defined "restrict". |
|
7dcf8a1f2f5e
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|
621 Other compilers use __restrict, __restrict__, and _Restrict, and |
|
7dcf8a1f2f5e
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622 'configure' might #define 'restrict' to those words, so pick a |
|
7dcf8a1f2f5e
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|
623 different name. */ |
|
7dcf8a1f2f5e
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|
624 #ifndef _Restrict_ |
|
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|
625 # if 199901L <= __STDC_VERSION__ |
|
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|
626 # define _Restrict_ restrict |
|
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627 # elif 2 < __GNUC__ || (2 == __GNUC__ && 95 <= __GNUC_MINOR__) |
|
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628 # define _Restrict_ __restrict |
|
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|
629 # else |
|
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|
630 # define _Restrict_ |
| 2927 | 631 # endif |
|
2940
c7143052abca
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|
632 #endif |
|
7689
b4806b1ec9e4
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633 /* gcc 3.1 and up support the [restrict] syntax. Don't trust |
|
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634 sys/cdefs.h's definition of __restrict_arr, though, as it |
|
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635 mishandles gcc -ansi -pedantic. */ |
|
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636 #ifndef _Restrict_arr_ |
|
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637 # if ((199901L <= __STDC_VERSION__ \ |
|
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|
638 || ((3 < __GNUC__ || (3 == __GNUC__ && 1 <= __GNUC_MINOR__)) \ |
|
15962
cfa1d5dbe78c
Support for old NeXTstep 3.3 gcc.
Daniel Richard G <skunk@iskunk.org>
parents:
14079
diff
changeset
|
639 && !defined __STRICT_ANSI__)) \ |
|
8045
7dcf8a1f2f5e
* lib/regex.h (_Restrict_): Renamed from __restrict, to avoid
Paul Eggert <eggert@cs.ucla.edu>
parents:
7692
diff
changeset
|
640 && !defined __GNUG__) |
|
7dcf8a1f2f5e
* lib/regex.h (_Restrict_): Renamed from __restrict, to avoid
Paul Eggert <eggert@cs.ucla.edu>
parents:
7692
diff
changeset
|
641 # define _Restrict_arr_ _Restrict_ |
|
7dcf8a1f2f5e
* lib/regex.h (_Restrict_): Renamed from __restrict, to avoid
Paul Eggert <eggert@cs.ucla.edu>
parents:
7692
diff
changeset
|
642 # else |
|
7dcf8a1f2f5e
* lib/regex.h (_Restrict_): Renamed from __restrict, to avoid
Paul Eggert <eggert@cs.ucla.edu>
parents:
7692
diff
changeset
|
643 # define _Restrict_arr_ |
|
7dcf8a1f2f5e
* lib/regex.h (_Restrict_): Renamed from __restrict, to avoid
Paul Eggert <eggert@cs.ucla.edu>
parents:
7692
diff
changeset
|
644 # endif |
|
3684
c8ed84e015e6
(__restrict_arr): Update from libc.
Jim Meyering <jim@meyering.net>
parents:
3336
diff
changeset
|
645 #endif |
| 2927 | 646 |
| 14 | 647 /* POSIX compatibility. */ |
|
8045
7dcf8a1f2f5e
* lib/regex.h (_Restrict_): Renamed from __restrict, to avoid
Paul Eggert <eggert@cs.ucla.edu>
parents:
7692
diff
changeset
|
648 extern int regcomp (regex_t *_Restrict_ __preg, |
|
7dcf8a1f2f5e
* lib/regex.h (_Restrict_): Renamed from __restrict, to avoid
Paul Eggert <eggert@cs.ucla.edu>
parents:
7692
diff
changeset
|
649 const char *_Restrict_ __pattern, |
|
6076
e2dd51f6e259
* config/srclist.txt: Add glibc bugs 1220, 1221, 1222.
Paul Eggert <eggert@cs.ucla.edu>
parents:
6059
diff
changeset
|
650 int __cflags); |
| 1466 | 651 |
|
8045
7dcf8a1f2f5e
* lib/regex.h (_Restrict_): Renamed from __restrict, to avoid
Paul Eggert <eggert@cs.ucla.edu>
parents:
7692
diff
changeset
|
652 extern int regexec (const regex_t *_Restrict_ __preg, |
|
7dcf8a1f2f5e
* lib/regex.h (_Restrict_): Renamed from __restrict, to avoid
Paul Eggert <eggert@cs.ucla.edu>
parents:
7692
diff
changeset
|
653 const char *_Restrict_ __string, size_t __nmatch, |
|
7dcf8a1f2f5e
* lib/regex.h (_Restrict_): Renamed from __restrict, to avoid
Paul Eggert <eggert@cs.ucla.edu>
parents:
7692
diff
changeset
|
654 regmatch_t __pmatch[_Restrict_arr_], |
|
6076
e2dd51f6e259
* config/srclist.txt: Add glibc bugs 1220, 1221, 1222.
Paul Eggert <eggert@cs.ucla.edu>
parents:
6059
diff
changeset
|
655 int __eflags); |
| 1466 | 656 |
|
8045
7dcf8a1f2f5e
* lib/regex.h (_Restrict_): Renamed from __restrict, to avoid
Paul Eggert <eggert@cs.ucla.edu>
parents:
7692
diff
changeset
|
657 extern size_t regerror (int __errcode, const regex_t *_Restrict_ __preg, |
|
7dcf8a1f2f5e
* lib/regex.h (_Restrict_): Renamed from __restrict, to avoid
Paul Eggert <eggert@cs.ucla.edu>
parents:
7692
diff
changeset
|
658 char *_Restrict_ __errbuf, size_t __errbuf_size); |
| 1466 | 659 |
|
6076
e2dd51f6e259
* config/srclist.txt: Add glibc bugs 1220, 1221, 1222.
Paul Eggert <eggert@cs.ucla.edu>
parents:
6059
diff
changeset
|
660 extern void regfree (regex_t *__preg); |
| 14 | 661 |
|
988
ba13cef00d11
replace with new version from libc
Jim Meyering <jim@meyering.net>
parents:
649
diff
changeset
|
662 |
|
ba13cef00d11
replace with new version from libc
Jim Meyering <jim@meyering.net>
parents:
649
diff
changeset
|
663 #ifdef __cplusplus |
|
ba13cef00d11
replace with new version from libc
Jim Meyering <jim@meyering.net>
parents:
649
diff
changeset
|
664 } |
|
ba13cef00d11
replace with new version from libc
Jim Meyering <jim@meyering.net>
parents:
649
diff
changeset
|
665 #endif /* C++ */ |
|
ba13cef00d11
replace with new version from libc
Jim Meyering <jim@meyering.net>
parents:
649
diff
changeset
|
666 |
|
ba13cef00d11
replace with new version from libc
Jim Meyering <jim@meyering.net>
parents:
649
diff
changeset
|
667 #endif /* regex.h */ |