| 1 | /* Copyright (C) 1991-1993, 1996-2007, 2009-2012 Free Software Foundation, Inc.
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| 2 |
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| 3 | This program is free software; you can redistribute it and/or modify
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| 4 | it under the terms of the GNU General Public License as published by
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| 5 | the Free Software Foundation; either version 3, or (at your option)
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| 6 | any later version.
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| 7 |
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| 8 | This program is distributed in the hope that it will be useful,
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| 9 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 10 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 11 | GNU General Public License for more details.
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| 12 |
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| 13 | You should have received a copy of the GNU General Public License
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| 14 | along with this program; if not, see <http://www.gnu.org/licenses/>. */
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| 15 |
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| 16 | #ifndef _LIBC
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| 17 | # include <config.h>
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| 18 | #endif
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| 19 |
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| 20 | /* Enable GNU extensions in fnmatch.h. */
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| 21 | #ifndef _GNU_SOURCE
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| 22 | # define _GNU_SOURCE 1
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| 23 | #endif
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| 24 |
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| 25 | #if ! defined __builtin_expect && __GNUC__ < 3
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| 26 | # define __builtin_expect(expr, expected) (expr)
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| 27 | #endif
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| 28 |
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| 29 | #include <fnmatch.h>
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| 30 |
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| 31 | #include <alloca.h>
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| 32 | #include <assert.h>
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| 33 | #include <ctype.h>
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| 34 | #include <errno.h>
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| 35 | #include <stddef.h>
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| 36 | #include <stdbool.h>
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| 37 | #include <stdlib.h>
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| 38 | #include <string.h>
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| 39 |
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| 40 | #define WIDE_CHAR_SUPPORT \
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| 41 | (HAVE_WCTYPE_H && HAVE_BTOWC && HAVE_ISWCTYPE \
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| 42 | && HAVE_WMEMCHR && (HAVE_WMEMCPY || HAVE_WMEMPCPY))
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| 43 |
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| 44 | /* For platform which support the ISO C amendment 1 functionality we
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| 45 | support user defined character classes. */
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| 46 | #if defined _LIBC || WIDE_CHAR_SUPPORT
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| 47 | # include <wctype.h>
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| 48 | # include <wchar.h>
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| 49 | #endif
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| 50 |
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| 51 | /* We need some of the locale data (the collation sequence information)
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| 52 | but there is no interface to get this information in general. Therefore
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| 53 | we support a correct implementation only in glibc. */
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| 54 | #ifdef _LIBC
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| 55 | # include "../locale/localeinfo.h"
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| 56 | # include "../locale/elem-hash.h"
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| 57 | # include "../locale/coll-lookup.h"
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| 58 | # include <shlib-compat.h>
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| 59 |
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| 60 | # define CONCAT(a,b) __CONCAT(a,b)
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| 61 | # define mbsrtowcs __mbsrtowcs
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| 62 | # define fnmatch __fnmatch
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| 63 | extern int fnmatch (const char *pattern, const char *string, int flags);
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| 64 | #endif
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| 65 |
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| 66 | #ifndef SIZE_MAX
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| 67 | # define SIZE_MAX ((size_t) -1)
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| 68 | #endif
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| 69 |
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| 70 | /* We often have to test for FNM_FILE_NAME and FNM_PERIOD being both set. */
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| 71 | #define NO_LEADING_PERIOD(flags) \
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| 72 | ((flags & (FNM_FILE_NAME | FNM_PERIOD)) == (FNM_FILE_NAME | FNM_PERIOD))
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| 73 |
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| 74 | /* Comment out all this code if we are using the GNU C Library, and are not
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| 75 | actually compiling the library itself, and have not detected a bug
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| 76 | in the library. This code is part of the GNU C
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| 77 | Library, but also included in many other GNU distributions. Compiling
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| 78 | and linking in this code is a waste when using the GNU C library
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| 79 | (especially if it is a shared library). Rather than having every GNU
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| 80 | program understand 'configure --with-gnu-libc' and omit the object files,
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| 81 | it is simpler to just do this in the source for each such file. */
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| 82 |
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| 83 | #if defined _LIBC || !defined __GNU_LIBRARY__ || !HAVE_FNMATCH_GNU
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| 84 |
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| 85 |
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| 86 | # if ! (defined isblank || (HAVE_ISBLANK && HAVE_DECL_ISBLANK))
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| 87 | # define isblank(c) ((c) == ' ' || (c) == '\t')
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| 88 | # endif
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| 89 |
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| 90 | # define STREQ(s1, s2) (strcmp (s1, s2) == 0)
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| 91 |
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| 92 | # if defined _LIBC || WIDE_CHAR_SUPPORT
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| 93 | /* The GNU C library provides support for user-defined character classes
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| 94 | and the functions from ISO C amendment 1. */
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| 95 | # ifdef CHARCLASS_NAME_MAX
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| 96 | # define CHAR_CLASS_MAX_LENGTH CHARCLASS_NAME_MAX
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| 97 | # else
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| 98 | /* This shouldn't happen but some implementation might still have this
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| 99 | problem. Use a reasonable default value. */
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| 100 | # define CHAR_CLASS_MAX_LENGTH 256
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| 101 | # endif
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| 102 |
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| 103 | # ifdef _LIBC
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| 104 | # define IS_CHAR_CLASS(string) __wctype (string)
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| 105 | # else
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| 106 | # define IS_CHAR_CLASS(string) wctype (string)
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| 107 | # endif
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| 108 |
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| 109 | # ifdef _LIBC
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| 110 | # define ISWCTYPE(WC, WT) __iswctype (WC, WT)
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| 111 | # else
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| 112 | # define ISWCTYPE(WC, WT) iswctype (WC, WT)
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| 113 | # endif
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| 114 |
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| 115 | # if (HAVE_MBSTATE_T && HAVE_MBSRTOWCS) || _LIBC
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| 116 | /* In this case we are implementing the multibyte character handling. */
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| 117 | # define HANDLE_MULTIBYTE 1
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| 118 | # endif
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| 119 |
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| 120 | # else
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| 121 | # define CHAR_CLASS_MAX_LENGTH 6 /* Namely, 'xdigit'. */
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| 122 |
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| 123 | # define IS_CHAR_CLASS(string) \
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| 124 | (STREQ (string, "alpha") || STREQ (string, "upper") \
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| 125 | || STREQ (string, "lower") || STREQ (string, "digit") \
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| 126 | || STREQ (string, "alnum") || STREQ (string, "xdigit") \
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| 127 | || STREQ (string, "space") || STREQ (string, "print") \
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| 128 | || STREQ (string, "punct") || STREQ (string, "graph") \
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| 129 | || STREQ (string, "cntrl") || STREQ (string, "blank"))
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| 130 | # endif
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| 131 |
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| 132 | /* Avoid depending on library functions or files
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| 133 | whose names are inconsistent. */
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| 134 |
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| 135 | /* Global variable. */
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| 136 | static int posixly_correct;
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| 137 |
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| 138 | # ifndef internal_function
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| 139 | /* Inside GNU libc we mark some function in a special way. In other
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| 140 | environments simply ignore the marking. */
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| 141 | # define internal_function
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| 142 | # endif
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| 143 |
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| 144 | /* Note that this evaluates C many times. */
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| 145 | # define FOLD(c) ((flags & FNM_CASEFOLD) ? tolower (c) : (c))
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| 146 | # define CHAR char
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| 147 | # define UCHAR unsigned char
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| 148 | # define INT int
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| 149 | # define FCT internal_fnmatch
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| 150 | # define EXT ext_match
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| 151 | # define END end_pattern
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| 152 | # define L_(CS) CS
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| 153 | # ifdef _LIBC
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| 154 | # define BTOWC(C) __btowc (C)
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| 155 | # else
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| 156 | # define BTOWC(C) btowc (C)
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| 157 | # endif
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| 158 | # define STRLEN(S) strlen (S)
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| 159 | # define STRCAT(D, S) strcat (D, S)
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| 160 | # ifdef _LIBC
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| 161 | # define MEMPCPY(D, S, N) __mempcpy (D, S, N)
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| 162 | # else
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| 163 | # if HAVE_MEMPCPY
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| 164 | # define MEMPCPY(D, S, N) mempcpy (D, S, N)
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| 165 | # else
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| 166 | # define MEMPCPY(D, S, N) ((void *) ((char *) memcpy (D, S, N) + (N)))
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| 167 | # endif
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| 168 | # endif
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| 169 | # define MEMCHR(S, C, N) memchr (S, C, N)
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| 170 | # include "fnmatch_loop.c"
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| 171 |
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| 172 |
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| 173 | # if HANDLE_MULTIBYTE
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| 174 | # define FOLD(c) ((flags & FNM_CASEFOLD) ? towlower (c) : (c))
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| 175 | # define CHAR wchar_t
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| 176 | # define UCHAR wint_t
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| 177 | # define INT wint_t
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| 178 | # define FCT internal_fnwmatch
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| 179 | # define EXT ext_wmatch
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| 180 | # define END end_wpattern
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| 181 | # define L_(CS) L##CS
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| 182 | # define BTOWC(C) (C)
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| 183 | # ifdef _LIBC
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| 184 | # define STRLEN(S) __wcslen (S)
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| 185 | # define STRCAT(D, S) __wcscat (D, S)
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| 186 | # define MEMPCPY(D, S, N) __wmempcpy (D, S, N)
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| 187 | # else
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| 188 | # define STRLEN(S) wcslen (S)
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| 189 | # define STRCAT(D, S) wcscat (D, S)
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| 190 | # if HAVE_WMEMPCPY
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| 191 | # define MEMPCPY(D, S, N) wmempcpy (D, S, N)
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| 192 | # else
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| 193 | # define MEMPCPY(D, S, N) (wmemcpy (D, S, N) + (N))
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| 194 | # endif
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| 195 | # endif
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| 196 | # define MEMCHR(S, C, N) wmemchr (S, C, N)
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| 197 | # define WIDE_CHAR_VERSION 1
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| 198 |
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| 199 | # undef IS_CHAR_CLASS
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| 200 | /* We have to convert the wide character string in a multibyte string. But
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| 201 | we know that the character class names consist of alphanumeric characters
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| 202 | from the portable character set, and since the wide character encoding
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| 203 | for a member of the portable character set is the same code point as
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| 204 | its single-byte encoding, we can use a simplified method to convert the
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| 205 | string to a multibyte character string. */
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| 206 | static wctype_t
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| 207 | is_char_class (const wchar_t *wcs)
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| 208 | {
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| 209 | char s[CHAR_CLASS_MAX_LENGTH + 1];
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| 210 | char *cp = s;
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| 211 |
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| 212 | do
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| 213 | {
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| 214 | /* Test for a printable character from the portable character set. */
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| 215 | # ifdef _LIBC
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| 216 | if (*wcs < 0x20 || *wcs > 0x7e
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| 217 | || *wcs == 0x24 || *wcs == 0x40 || *wcs == 0x60)
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| 218 | return (wctype_t) 0;
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| 219 | # else
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| 220 | switch (*wcs)
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| 221 | {
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| 222 | case L' ': case L'!': case L'"': case L'#': case L'%':
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| 223 | case L'&': case L'\'': case L'(': case L')': case L'*':
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| 224 | case L'+': case L',': case L'-': case L'.': case L'/':
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| 225 | case L'0': case L'1': case L'2': case L'3': case L'4':
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| 226 | case L'5': case L'6': case L'7': case L'8': case L'9':
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| 227 | case L':': case L';': case L'<': case L'=': case L'>':
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| 228 | case L'?':
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| 229 | case L'A': case L'B': case L'C': case L'D': case L'E':
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| 230 | case L'F': case L'G': case L'H': case L'I': case L'J':
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| 231 | case L'K': case L'L': case L'M': case L'N': case L'O':
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| 232 | case L'P': case L'Q': case L'R': case L'S': case L'T':
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| 233 | case L'U': case L'V': case L'W': case L'X': case L'Y':
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| 234 | case L'Z':
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| 235 | case L'[': case L'\\': case L']': case L'^': case L'_':
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| 236 | case L'a': case L'b': case L'c': case L'd': case L'e':
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| 237 | case L'f': case L'g': case L'h': case L'i': case L'j':
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| 238 | case L'k': case L'l': case L'm': case L'n': case L'o':
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| 239 | case L'p': case L'q': case L'r': case L's': case L't':
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| 240 | case L'u': case L'v': case L'w': case L'x': case L'y':
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| 241 | case L'z': case L'{': case L'|': case L'}': case L'~':
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| 242 | break;
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| 243 | default:
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| 244 | return (wctype_t) 0;
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| 245 | }
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| 246 | # endif
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| 247 |
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| 248 | /* Avoid overrunning the buffer. */
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| 249 | if (cp == s + CHAR_CLASS_MAX_LENGTH)
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| 250 | return (wctype_t) 0;
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| 251 |
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| 252 | *cp++ = (char) *wcs++;
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| 253 | }
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| 254 | while (*wcs != L'\0');
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| 255 |
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| 256 | *cp = '\0';
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| 257 |
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| 258 | # ifdef _LIBC
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| 259 | return __wctype (s);
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| 260 | # else
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| 261 | return wctype (s);
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| 262 | # endif
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| 263 | }
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| 264 | # define IS_CHAR_CLASS(string) is_char_class (string)
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| 265 |
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| 266 | # include "fnmatch_loop.c"
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| 267 | # endif
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| 268 |
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| 269 |
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| 270 | int
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| 271 | fnmatch (const char *pattern, const char *string, int flags)
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| 272 | {
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| 273 | # if HANDLE_MULTIBYTE
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| 274 | # define ALLOCA_LIMIT 2000
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| 275 | if (__builtin_expect (MB_CUR_MAX, 1) != 1)
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| 276 | {
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| 277 | mbstate_t ps;
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| 278 | size_t patsize;
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| 279 | size_t strsize;
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| 280 | size_t totsize;
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| 281 | wchar_t *wpattern;
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| 282 | wchar_t *wstring;
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| 283 | int res;
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| 284 |
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| 285 | /* Calculate the size needed to convert the strings to
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| 286 | wide characters. */
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| 287 | memset (&ps, '\0', sizeof (ps));
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| 288 | patsize = mbsrtowcs (NULL, &pattern, 0, &ps) + 1;
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| 289 | if (__builtin_expect (patsize != 0, 1))
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| 290 | {
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| 291 | assert (mbsinit (&ps));
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| 292 | strsize = mbsrtowcs (NULL, &string, 0, &ps) + 1;
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| 293 | if (__builtin_expect (strsize != 0, 1))
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| 294 | {
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| 295 | assert (mbsinit (&ps));
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| 296 | totsize = patsize + strsize;
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| 297 | if (__builtin_expect (! (patsize <= totsize
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| 298 | && totsize <= SIZE_MAX / sizeof (wchar_t)),
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| 299 | 0))
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| 300 | {
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| 301 | errno = ENOMEM;
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| 302 | return -1;
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| 303 | }
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| 304 |
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| 305 | /* Allocate room for the wide characters. */
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| 306 | if (__builtin_expect (totsize < ALLOCA_LIMIT, 1))
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| 307 | wpattern = (wchar_t *) alloca (totsize * sizeof (wchar_t));
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| 308 | else
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| 309 | {
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| 310 | wpattern = malloc (totsize * sizeof (wchar_t));
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| 311 | if (__builtin_expect (! wpattern, 0))
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| 312 | {
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| 313 | errno = ENOMEM;
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| 314 | return -1;
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| 315 | }
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| 316 | }
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| 317 | wstring = wpattern + patsize;
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| 318 |
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| 319 | /* Convert the strings into wide characters. */
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| 320 | mbsrtowcs (wpattern, &pattern, patsize, &ps);
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| 321 | assert (mbsinit (&ps));
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| 322 | mbsrtowcs (wstring, &string, strsize, &ps);
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| 323 |
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| 324 | res = internal_fnwmatch (wpattern, wstring, wstring + strsize - 1,
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| 325 | flags & FNM_PERIOD, flags);
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| 326 |
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| 327 | if (__builtin_expect (! (totsize < ALLOCA_LIMIT), 0))
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| 328 | free (wpattern);
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| 329 | return res;
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| 330 | }
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| 331 | }
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| 332 | }
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| 333 |
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| 334 | # endif /* HANDLE_MULTIBYTE */
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| 335 |
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| 336 | return internal_fnmatch (pattern, string, string + strlen (string),
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| 337 | flags & FNM_PERIOD, flags);
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| 338 | }
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| 339 |
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| 340 | # ifdef _LIBC
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| 341 | # undef fnmatch
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| 342 | versioned_symbol (libc, __fnmatch, fnmatch, GLIBC_2_2_3);
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| 343 | # if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_2_3)
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| 344 | strong_alias (__fnmatch, __fnmatch_old)
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| 345 | compat_symbol (libc, __fnmatch_old, fnmatch, GLIBC_2_0);
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| 346 | # endif
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| 347 | libc_hidden_ver (__fnmatch, fnmatch)
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| 348 | # endif
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| 349 |
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| 350 | #endif /* _LIBC or not __GNU_LIBRARY__. */
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