1 /* Copyright (C) 1991-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public
6 License as published by the Free Software Foundation; either
7 version 3 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 General Public License for more details.
14 You should have received a copy of the GNU General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
19 # include <libc-config.h>
22 /* Enable GNU extensions in fnmatch.h. */
24 # define _GNU_SOURCE 1
34 #if defined _LIBC || HAVE_ALLOCA
42 /* We need some of the locale data (the collation sequence information)
43 but there is no interface to get this information in general. Therefore
44 we support a correct implementation only in glibc. */
46 # include "../locale/localeinfo.h"
47 # include "../locale/coll-lookup.h"
48 # include <shlib-compat.h>
50 # define CONCAT(a,b) __CONCAT(a,b)
51 # define btowc __btowc
52 # define iswctype __iswctype
53 # define mbsrtowcs __mbsrtowcs
54 # define mempcpy __mempcpy
55 # define strnlen __strnlen
56 # define towlower __towlower
57 # define wcscat __wcscat
58 # define wcslen __wcslen
59 # define wctype __wctype
60 # define wmemchr __wmemchr
61 # define wmempcpy __wmempcpy
62 # define fnmatch __fnmatch
63 extern int fnmatch (const char *pattern
, const char *string
, int flags
);
67 # if (__GNUC__ >= 7) || (__clang_major__ >= 10)
68 # define FALLTHROUGH __attribute__ ((__fallthrough__))
70 # define FALLTHROUGH ((void) 0)
73 # include "attribute.h"
77 #include <flexmember.h>
80 typedef ptrdiff_t idx_t
;
85 /* We often have to test for FNM_FILE_NAME and FNM_PERIOD being both set. */
86 #define NO_LEADING_PERIOD(flags) \
87 ((flags & (FNM_FILE_NAME | FNM_PERIOD)) == (FNM_FILE_NAME | FNM_PERIOD))
91 /* The OS usually guarantees only one guard page at the bottom of the stack,
92 and a page size can be as small as 4096 bytes. So we cannot safely
93 allocate anything larger than 4096 bytes. Also care for the possibility
94 of a few compiler-allocated temporary stack slots. */
95 # define __libc_use_alloca(n) ((n) < 4032)
97 /* Just use malloc. */
98 # define __libc_use_alloca(n) false
100 # define alloca(n) malloc (n)
102 # define alloca_account(size, avar) ((avar) += (size), alloca (size))
105 /* Provide support for user-defined character classes, based on the functions
106 from ISO C 90 amendment 1. */
107 #ifdef CHARCLASS_NAME_MAX
108 # define CHAR_CLASS_MAX_LENGTH CHARCLASS_NAME_MAX
110 /* This shouldn't happen but some implementation might still have this
111 problem. Use a reasonable default value. */
112 # define CHAR_CLASS_MAX_LENGTH 256
115 #define IS_CHAR_CLASS(string) wctype (string)
117 /* Avoid depending on library functions or files
118 whose names are inconsistent. */
120 /* Global variable. */
121 static int posixly_correct
;
123 /* Note that this evaluates C many times. */
124 #define FOLD(c) ((flags & FNM_CASEFOLD) ? tolower (c) : (c))
126 #define UCHAR unsigned char
128 #define FCT internal_fnmatch
129 #define EXT ext_match
130 #define END end_pattern
131 #define STRUCT fnmatch_struct
133 #define BTOWC(C) btowc (C)
134 #define STRLEN(S) strlen (S)
135 #define STRCAT(D, S) strcat (D, S)
136 #define MEMPCPY(D, S, N) mempcpy (D, S, N)
137 #define MEMCHR(S, C, N) memchr (S, C, N)
138 #define WIDE_CHAR_VERSION 0
140 # include <locale/weight.h>
141 # define FINDIDX findidx
143 #include "fnmatch_loop.c"
146 #define FOLD(c) ((flags & FNM_CASEFOLD) ? towlower (c) : (c))
150 #define FCT internal_fnwmatch
151 #define EXT ext_wmatch
152 #define END end_wpattern
155 #define STRLEN(S) wcslen (S)
156 #define STRCAT(D, S) wcscat (D, S)
157 #define MEMPCPY(D, S, N) wmempcpy (D, S, N)
158 #define MEMCHR(S, C, N) wmemchr (S, C, N)
159 #define WIDE_CHAR_VERSION 1
161 /* Change the name the header defines so it doesn't conflict with
162 the <locale/weight.h> version included above. */
163 # define findidx findidxwc
164 # include <locale/weightwc.h>
166 # define FINDIDX findidxwc
170 /* We have to convert the wide character string in a multibyte string. But
171 we know that the character class names consist of alphanumeric characters
172 from the portable character set, and since the wide character encoding
173 for a member of the portable character set is the same code point as
174 its single-byte encoding, we can use a simplified method to convert the
175 string to a multibyte character string. */
177 is_char_class (const wchar_t *wcs
)
179 char s
[CHAR_CLASS_MAX_LENGTH
+ 1];
184 /* Test for a printable character from the portable character set. */
186 if (*wcs
< 0x20 || *wcs
> 0x7e
187 || *wcs
== 0x24 || *wcs
== 0x40 || *wcs
== 0x60)
192 case L
' ': case L
'!': case L
'"': case L
'#': case L
'%':
193 case L
'&': case L
'\'': case L
'(': case L
')': case L
'*':
194 case L
'+': case L
',': case L
'-': case L
'.': case L
'/':
195 case L
'0': case L
'1': case L
'2': case L
'3': case L
'4':
196 case L
'5': case L
'6': case L
'7': case L
'8': case L
'9':
197 case L
':': case L
';': case L
'<': case L
'=': case L
'>':
199 case L
'A': case L
'B': case L
'C': case L
'D': case L
'E':
200 case L
'F': case L
'G': case L
'H': case L
'I': case L
'J':
201 case L
'K': case L
'L': case L
'M': case L
'N': case L
'O':
202 case L
'P': case L
'Q': case L
'R': case L
'S': case L
'T':
203 case L
'U': case L
'V': case L
'W': case L
'X': case L
'Y':
205 case L
'[': case L
'\\': case L
']': case L
'^': case L
'_':
206 case L
'a': case L
'b': case L
'c': case L
'd': case L
'e':
207 case L
'f': case L
'g': case L
'h': case L
'i': case L
'j':
208 case L
'k': case L
'l': case L
'm': case L
'n': case L
'o':
209 case L
'p': case L
'q': case L
'r': case L
's': case L
't':
210 case L
'u': case L
'v': case L
'w': case L
'x': case L
'y':
211 case L
'z': case L
'{': case L
'|': case L
'}': case L
'~':
218 /* Avoid overrunning the buffer. */
219 if (cp
== s
+ CHAR_CLASS_MAX_LENGTH
)
222 *cp
++ = (char) *wcs
++;
224 while (*wcs
!= L
'\0');
230 #define IS_CHAR_CLASS(string) is_char_class (string)
232 #include "fnmatch_loop.c"
236 fnmatch (const char *pattern
, const char *string
, int flags
)
238 if (__glibc_unlikely (MB_CUR_MAX
!= 1))
243 wchar_t *wpattern_malloc
= NULL
;
245 wchar_t *wstring_malloc
= NULL
;
247 size_t alloca_used
= 0;
249 /* Convert the strings into wide characters. */
250 memset (&ps
, '\0', sizeof (ps
));
252 n
= strnlen (pattern
, 1024);
253 if (__glibc_likely (n
< 1024))
255 wpattern
= (wchar_t *) alloca_account ((n
+ 1) * sizeof (wchar_t),
257 n
= mbsrtowcs (wpattern
, &p
, n
+ 1, &ps
);
258 if (__glibc_unlikely (n
== (size_t) -1))
260 XXX Do we have to set 'errno' to something which mbsrtows hasn't
265 memset (&ps
, '\0', sizeof (ps
));
266 goto prepare_wpattern
;
272 n
= mbsrtowcs (NULL
, &pattern
, 0, &ps
);
273 if (__glibc_unlikely (n
== (size_t) -1))
275 XXX Do we have to set 'errno' to something which mbsrtows hasn't
278 if (__glibc_unlikely (n
>= (size_t) -1 / sizeof (wchar_t)))
280 __set_errno (ENOMEM
);
283 wpattern_malloc
= wpattern
284 = (wchar_t *) malloc ((n
+ 1) * sizeof (wchar_t));
285 assert (mbsinit (&ps
));
286 if (wpattern
== NULL
)
288 (void) mbsrtowcs (wpattern
, &pattern
, n
+ 1, &ps
);
291 assert (mbsinit (&ps
));
292 n
= strnlen (string
, 1024);
294 if (__glibc_likely (n
< 1024))
296 wstring
= (wchar_t *) alloca_account ((n
+ 1) * sizeof (wchar_t),
298 n
= mbsrtowcs (wstring
, &p
, n
+ 1, &ps
);
299 if (__glibc_unlikely (n
== (size_t) -1))
302 XXX Do we have to set 'errno' to something which
303 mbsrtows hasn't already done? */
305 free (wpattern_malloc
);
310 memset (&ps
, '\0', sizeof (ps
));
311 goto prepare_wstring
;
317 n
= mbsrtowcs (NULL
, &string
, 0, &ps
);
318 if (__glibc_unlikely (n
== (size_t) -1))
320 XXX Do we have to set 'errno' to something which mbsrtows hasn't
323 if (__glibc_unlikely (n
>= (size_t) -1 / sizeof (wchar_t)))
325 free (wpattern_malloc
);
326 __set_errno (ENOMEM
);
330 wstring_malloc
= wstring
331 = (wchar_t *) malloc ((n
+ 1) * sizeof (wchar_t));
334 free (wpattern_malloc
);
337 assert (mbsinit (&ps
));
338 (void) mbsrtowcs (wstring
, &string
, n
+ 1, &ps
);
341 int res
= internal_fnwmatch (wpattern
, wstring
, wstring
+ n
,
342 flags
& FNM_PERIOD
, flags
, NULL
,
345 free (wstring_malloc
);
346 free (wpattern_malloc
);
351 return internal_fnmatch (pattern
, string
, string
+ strlen (string
),
352 flags
& FNM_PERIOD
, flags
, NULL
, 0);
356 versioned_symbol (libc
, __fnmatch
, fnmatch
, GLIBC_2_2_3
);
357 #if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_2_3)
358 strong_alias (__fnmatch
, __fnmatch_old
)
359 compat_symbol (libc
, __fnmatch_old
, fnmatch
, GLIBC_2_0
);
361 libc_hidden_ver (__fnmatch
, fnmatch
)