annotate lib/fnmatch.c @ 6620:d01ba6cdaf9e

* fnmatch.c (L_): Renamed from L, to work around a bug in Mac OS X 10.3.9 with GCC 3 reported by Claudio Fontana in <http://lists.gnu.org/archive/html/bug-gnulib/2006-01/msg00074.html>. All uses changed.
author Paul Eggert <eggert@cs.ucla.edu>
date Fri, 27 Jan 2006 18:40:27 +0000
parents 96c32553b4c6
children fa896bb33133
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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d01ba6cdaf9e * fnmatch.c (L_): Renamed from L, to work around a bug in
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1 /* Copyright (C) 1991,1992,1993,1996,1997,1998,1999,2000,2001,2002,2003,2004,2005,2006
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2 Free Software Foundation, Inc.
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3
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4 This program is free software; you can redistribute it and/or modify
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5 it under the terms of the GNU General Public License as published by
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6 the Free Software Foundation; either version 2, or (at your option)
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7 any later version.
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8
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9 This program is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 GNU General Public License for more details.
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13
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14 You should have received a copy of the GNU General Public License
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15 along with this program; if not, write to the Free Software Foundation,
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16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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17
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18 #ifdef HAVE_CONFIG_H
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19 # include <config.h>
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20 #endif
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21
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22 /* Enable GNU extensions in fnmatch.h. */
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23 #ifndef _GNU_SOURCE
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24 # define _GNU_SOURCE 1
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25 #endif
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26
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27 #if ! defined __builtin_expect && __GNUC__ < 3
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28 # define __builtin_expect(expr, expected) (expr)
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29 #endif
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30
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31 #include <fnmatch.h>
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32
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33 #include <alloca.h>
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34 #include <assert.h>
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35 #include <ctype.h>
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36 #include <errno.h>
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37 #include <stddef.h>
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38 #include <stdbool.h>
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39 #include <stdlib.h>
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40 #include <string.h>
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41
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42 #define WIDE_CHAR_SUPPORT \
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43 (HAVE_WCTYPE_H && HAVE_WCHAR_H && HAVE_BTOWC \
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44 && HAVE_WMEMCHR && (HAVE_WMEMCPY || HAVE_WMEMPCPY))
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45
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46 /* For platform which support the ISO C amendement 1 functionality we
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47 support user defined character classes. */
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48 #if defined _LIBC || WIDE_CHAR_SUPPORT
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49 /* Solaris 2.5 has a bug: <wchar.h> must be included before <wctype.h>. */
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50 # include <wchar.h>
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51 # include <wctype.h>
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52 #endif
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53
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54 /* We need some of the locale data (the collation sequence information)
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55 but there is no interface to get this information in general. Therefore
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56 we support a correct implementation only in glibc. */
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57 #ifdef _LIBC
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58 # include "../locale/localeinfo.h"
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59 # include "../locale/elem-hash.h"
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60 # include "../locale/coll-lookup.h"
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61 # include <shlib-compat.h>
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62
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63 # define CONCAT(a,b) __CONCAT(a,b)
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64 # define mbsrtowcs __mbsrtowcs
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65 # define fnmatch __fnmatch
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66 extern int fnmatch (const char *pattern, const char *string, int flags);
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67 #endif
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68
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69 #ifndef SIZE_MAX
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70 # define SIZE_MAX ((size_t) -1)
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71 #endif
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72
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73 /* We often have to test for FNM_FILE_NAME and FNM_PERIOD being both set. */
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74 #define NO_LEADING_PERIOD(flags) \
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75 ((flags & (FNM_FILE_NAME | FNM_PERIOD)) == (FNM_FILE_NAME | FNM_PERIOD))
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76
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77 /* Comment out all this code if we are using the GNU C Library, and are not
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78 actually compiling the library itself, and have not detected a bug
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79 in the library. This code is part of the GNU C
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80 Library, but also included in many other GNU distributions. Compiling
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81 and linking in this code is a waste when using the GNU C library
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82 (especially if it is a shared library). Rather than having every GNU
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83 program understand `configure --with-gnu-libc' and omit the object files,
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84 it is simpler to just do this in the source for each such file. */
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85
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86 #if defined _LIBC || !defined __GNU_LIBRARY__ || !HAVE_FNMATCH_GNU
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87
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88
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89 # if defined STDC_HEADERS || !defined isascii
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90 # define ISASCII(c) 1
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91 # else
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92 # define ISASCII(c) isascii(c)
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93 # endif
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94
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95 # ifdef isblank
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96 # define ISBLANK(c) (ISASCII (c) && isblank (c))
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97 # else
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98 # define ISBLANK(c) ((c) == ' ' || (c) == '\t')
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99 # endif
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100 # ifdef isgraph
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101 # define ISGRAPH(c) (ISASCII (c) && isgraph (c))
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102 # else
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103 # define ISGRAPH(c) (ISASCII (c) && isprint (c) && !isspace (c))
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104 # endif
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105
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106 # define ISPRINT(c) (ISASCII (c) && isprint (c))
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107 # define ISDIGIT(c) (ISASCII (c) && isdigit (c))
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108 # define ISALNUM(c) (ISASCII (c) && isalnum (c))
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109 # define ISALPHA(c) (ISASCII (c) && isalpha (c))
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110 # define ISCNTRL(c) (ISASCII (c) && iscntrl (c))
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111 # define ISLOWER(c) (ISASCII (c) && islower (c))
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112 # define ISPUNCT(c) (ISASCII (c) && ispunct (c))
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113 # define ISSPACE(c) (ISASCII (c) && isspace (c))
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114 # define ISUPPER(c) (ISASCII (c) && isupper (c))
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115 # define ISXDIGIT(c) (ISASCII (c) && isxdigit (c))
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116
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117 # define STREQ(s1, s2) ((strcmp (s1, s2) == 0))
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118
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119 # if defined _LIBC || WIDE_CHAR_SUPPORT
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120 /* The GNU C library provides support for user-defined character classes
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121 and the functions from ISO C amendement 1. */
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122 # ifdef CHARCLASS_NAME_MAX
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123 # define CHAR_CLASS_MAX_LENGTH CHARCLASS_NAME_MAX
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124 # else
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125 /* This shouldn't happen but some implementation might still have this
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126 problem. Use a reasonable default value. */
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127 # define CHAR_CLASS_MAX_LENGTH 256
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128 # endif
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129
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130 # ifdef _LIBC
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131 # define IS_CHAR_CLASS(string) __wctype (string)
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132 # else
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133 # define IS_CHAR_CLASS(string) wctype (string)
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134 # endif
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135
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136 # ifdef _LIBC
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137 # define ISWCTYPE(WC, WT) __iswctype (WC, WT)
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138 # else
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139 # define ISWCTYPE(WC, WT) iswctype (WC, WT)
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140 # endif
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141
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142 # if (HAVE_MBSTATE_T && HAVE_MBSRTOWCS) || _LIBC
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143 /* In this case we are implementing the multibyte character handling. */
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144 # define HANDLE_MULTIBYTE 1
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145 # endif
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146
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147 # else
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148 # define CHAR_CLASS_MAX_LENGTH 6 /* Namely, `xdigit'. */
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149
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150 # define IS_CHAR_CLASS(string) \
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151 (STREQ (string, "alpha") || STREQ (string, "upper") \
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152 || STREQ (string, "lower") || STREQ (string, "digit") \
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153 || STREQ (string, "alnum") || STREQ (string, "xdigit") \
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154 || STREQ (string, "space") || STREQ (string, "print") \
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155 || STREQ (string, "punct") || STREQ (string, "graph") \
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156 || STREQ (string, "cntrl") || STREQ (string, "blank"))
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157 # endif
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158
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159 /* Avoid depending on library functions or files
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160 whose names are inconsistent. */
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161
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162 /* Global variable. */
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163 static int posixly_correct;
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164
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165 # ifndef internal_function
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166 /* Inside GNU libc we mark some function in a special way. In other
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167 environments simply ignore the marking. */
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168 # define internal_function
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169 # endif
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170
884
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171 /* Note that this evaluates C many times. */
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172 # ifdef _LIBC
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173 # define FOLD(c) ((flags & FNM_CASEFOLD) ? tolower (c) : (c))
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174 # else
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175 # define FOLD(c) ((flags & FNM_CASEFOLD) && ISUPPER (c) ? tolower (c) : (c))
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176 # endif
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177 # define CHAR char
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178 # define UCHAR unsigned char
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179 # define INT int
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180 # define FCT internal_fnmatch
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181 # define EXT ext_match
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182 # define END end_pattern
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183 # define L_(CS) CS
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184 # ifdef _LIBC
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185 # define BTOWC(C) __btowc (C)
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186 # else
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187 # define BTOWC(C) btowc (C)
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188 # endif
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189 # define STRLEN(S) strlen (S)
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190 # define STRCAT(D, S) strcat (D, S)
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191 # ifdef _LIBC
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192 # define MEMPCPY(D, S, N) __mempcpy (D, S, N)
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193 # else
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194 # if HAVE_MEMPCPY
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195 # define MEMPCPY(D, S, N) mempcpy (D, S, N)
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196 # else
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197 # define MEMPCPY(D, S, N) ((void *) ((char *) memcpy (D, S, N) + (N)))
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198 # endif
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199 # endif
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200 # define MEMCHR(S, C, N) memchr (S, C, N)
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201 # define STRCOLL(S1, S2) strcoll (S1, S2)
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202 # include "fnmatch_loop.c"
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203
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204
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205 # if HANDLE_MULTIBYTE
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206 # define FOLD(c) ((flags & FNM_CASEFOLD) ? towlower (c) : (c))
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207 # define CHAR wchar_t
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208 # define UCHAR wint_t
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209 # define INT wint_t
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210 # define FCT internal_fnwmatch
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211 # define EXT ext_wmatch
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212 # define END end_wpattern
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213 # define L_(CS) L##CS
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214 # define BTOWC(C) (C)
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215 # ifdef _LIBC
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216 # define STRLEN(S) __wcslen (S)
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217 # define STRCAT(D, S) __wcscat (D, S)
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218 # define MEMPCPY(D, S, N) __wmempcpy (D, S, N)
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219 # else
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220 # define STRLEN(S) wcslen (S)
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221 # define STRCAT(D, S) wcscat (D, S)
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222 # if HAVE_WMEMPCPY
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223 # define MEMPCPY(D, S, N) wmempcpy (D, S, N)
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224 # else
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225 # define MEMPCPY(D, S, N) (wmemcpy (D, S, N) + (N))
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226 # endif
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227 # endif
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228 # define MEMCHR(S, C, N) wmemchr (S, C, N)
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229 # define STRCOLL(S1, S2) wcscoll (S1, S2)
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230 # define WIDE_CHAR_VERSION 1
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231
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232 # undef IS_CHAR_CLASS
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233 /* We have to convert the wide character string in a multibyte string. But
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234 we know that the character class names consist of alphanumeric characters
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235 from the portable character set, and since the wide character encoding
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236 for a member of the portable character set is the same code point as
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237 its single-byte encoding, we can use a simplified method to convert the
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238 string to a multibyte character string. */
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239 static wctype_t
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240 is_char_class (const wchar_t *wcs)
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241 {
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242 char s[CHAR_CLASS_MAX_LENGTH + 1];
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243 char *cp = s;
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244
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245 do
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246 {
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247 /* Test for a printable character from the portable character set. */
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248 # ifdef _LIBC
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249 if (*wcs < 0x20 || *wcs > 0x7e
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250 || *wcs == 0x24 || *wcs == 0x40 || *wcs == 0x60)
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251 return (wctype_t) 0;
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252 # else
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253 switch (*wcs)
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254 {
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255 case L' ': case L'!': case L'"': case L'#': case L'%':
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256 case L'&': case L'\'': case L'(': case L')': case L'*':
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257 case L'+': case L',': case L'-': case L'.': case L'/':
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258 case L'0': case L'1': case L'2': case L'3': case L'4':
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259 case L'5': case L'6': case L'7': case L'8': case L'9':
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260 case L':': case L';': case L'<': case L'=': case L'>':
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261 case L'?':
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262 case L'A': case L'B': case L'C': case L'D': case L'E':
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263 case L'F': case L'G': case L'H': case L'I': case L'J':
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264 case L'K': case L'L': case L'M': case L'N': case L'O':
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265 case L'P': case L'Q': case L'R': case L'S': case L'T':
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266 case L'U': case L'V': case L'W': case L'X': case L'Y':
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267 case L'Z':
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268 case L'[': case L'\\': case L']': case L'^': case L'_':
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269 case L'a': case L'b': case L'c': case L'd': case L'e':
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270 case L'f': case L'g': case L'h': case L'i': case L'j':
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271 case L'k': case L'l': case L'm': case L'n': case L'o':
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272 case L'p': case L'q': case L'r': case L's': case L't':
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273 case L'u': case L'v': case L'w': case L'x': case L'y':
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274 case L'z': case L'{': case L'|': case L'}': case L'~':
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275 break;
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276 default:
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277 return (wctype_t) 0;
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278 }
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279 # endif
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280
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281 /* Avoid overrunning the buffer. */
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282 if (cp == s + CHAR_CLASS_MAX_LENGTH)
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283 return (wctype_t) 0;
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284
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285 *cp++ = (char) *wcs++;
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286 }
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287 while (*wcs != L'\0');
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288
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289 *cp = '\0';
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290
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291 # ifdef _LIBC
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292 return __wctype (s);
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293 # else
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294 return wctype (s);
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295 # endif
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296 }
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297 # define IS_CHAR_CLASS(string) is_char_class (string)
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298
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299 # include "fnmatch_loop.c"
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300 # endif
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301
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302
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303 int
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304 fnmatch (const char *pattern, const char *string, int flags)
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305 {
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306 # if HANDLE_MULTIBYTE
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307 # define ALLOCA_LIMIT 2000
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308 if (__builtin_expect (MB_CUR_MAX, 1) != 1)
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309 {
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310 mbstate_t ps;
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311 size_t patsize;
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312 size_t strsize;
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313 size_t totsize;
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314 wchar_t *wpattern;
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315 wchar_t *wstring;
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316 int res;
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317
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318 /* Calculate the size needed to convert the strings to
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319 wide characters. */
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320 memset (&ps, '\0', sizeof (ps));
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321 patsize = mbsrtowcs (NULL, &pattern, 0, &ps) + 1;
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322 if (__builtin_expect (patsize != 0, 1))
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323 {
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324 assert (mbsinit (&ps));
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325 strsize = mbsrtowcs (NULL, &string, 0, &ps) + 1;
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326 if (__builtin_expect (strsize != 0, 1))
1c2b6487c46b * fnmatch.c (fnmatch): If there is an encoding error in a
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327 {
1c2b6487c46b * fnmatch.c (fnmatch): If there is an encoding error in a
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328 assert (mbsinit (&ps));
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329 totsize = patsize + strsize;
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330 if (__builtin_expect (! (patsize <= totsize
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331 && totsize <= SIZE_MAX / sizeof (wchar_t)),
1c2b6487c46b * fnmatch.c (fnmatch): If there is an encoding error in a
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diff changeset
332 0))
1c2b6487c46b * fnmatch.c (fnmatch): If there is an encoding error in a
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333 {
1c2b6487c46b * fnmatch.c (fnmatch): If there is an encoding error in a
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334 errno = ENOMEM;
1c2b6487c46b * fnmatch.c (fnmatch): If there is an encoding error in a
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335 return -1;
1c2b6487c46b * fnmatch.c (fnmatch): If there is an encoding error in a
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336 }
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337
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338 /* Allocate room for the wide characters. */
1c2b6487c46b * fnmatch.c (fnmatch): If there is an encoding error in a
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339 if (__builtin_expect (totsize < ALLOCA_LIMIT, 1))
1c2b6487c46b * fnmatch.c (fnmatch): If there is an encoding error in a
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340 wpattern = (wchar_t *) alloca (totsize * sizeof (wchar_t));
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341 else
1c2b6487c46b * fnmatch.c (fnmatch): If there is an encoding error in a
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342 {
1c2b6487c46b * fnmatch.c (fnmatch): If there is an encoding error in a
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343 wpattern = malloc (totsize * sizeof (wchar_t));
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344 if (__builtin_expect (! wpattern, 0))
1c2b6487c46b * fnmatch.c (fnmatch): If there is an encoding error in a
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345 {
1c2b6487c46b * fnmatch.c (fnmatch): If there is an encoding error in a
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diff changeset
346 errno = ENOMEM;
1c2b6487c46b * fnmatch.c (fnmatch): If there is an encoding error in a
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347 return -1;
1c2b6487c46b * fnmatch.c (fnmatch): If there is an encoding error in a
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348 }
1c2b6487c46b * fnmatch.c (fnmatch): If there is an encoding error in a
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349 }
1c2b6487c46b * fnmatch.c (fnmatch): If there is an encoding error in a
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350 wstring = wpattern + patsize;
1c2b6487c46b * fnmatch.c (fnmatch): If there is an encoding error in a
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351
1c2b6487c46b * fnmatch.c (fnmatch): If there is an encoding error in a
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352 /* Convert the strings into wide characters. */
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353 mbsrtowcs (wpattern, &pattern, patsize, &ps);
1c2b6487c46b * fnmatch.c (fnmatch): If there is an encoding error in a
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354 assert (mbsinit (&ps));
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355 mbsrtowcs (wstring, &string, strsize, &ps);
1c2b6487c46b * fnmatch.c (fnmatch): If there is an encoding error in a
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356
1c2b6487c46b * fnmatch.c (fnmatch): If there is an encoding error in a
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357 res = internal_fnwmatch (wpattern, wstring, wstring + strsize - 1,
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358 flags & FNM_PERIOD, flags);
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359
1c2b6487c46b * fnmatch.c (fnmatch): If there is an encoding error in a
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360 if (__builtin_expect (! (totsize < ALLOCA_LIMIT), 0))
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diff changeset
361 free (wpattern);
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362 return res;
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363 }
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364 }
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365 }
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366
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367 # endif /* HANDLE_MULTIBYTE */
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368
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369 return internal_fnmatch (pattern, string, string + strlen (string),
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diff changeset
370 flags & FNM_PERIOD, flags);
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371 }
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372
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373 # ifdef _LIBC
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374 # undef fnmatch
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375 versioned_symbol (libc, __fnmatch, fnmatch, GLIBC_2_2_3);
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376 # if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_2_3)
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377 strong_alias (__fnmatch, __fnmatch_old)
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378 compat_symbol (libc, __fnmatch_old, fnmatch, GLIBC_2_0);
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379 # endif
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380 libc_hidden_ver (__fnmatch, fnmatch)
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381 # endif
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382
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383 #endif /* _LIBC or not __GNU_LIBRARY__. */