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 Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 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 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser 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
);
68 # define FALLTHROUGH __attribute__ ((__fallthrough__))
70 # define FALLTHROUGH ((void) 0)
73 # include "attribute.h"
77 #include <flexmember.h>
78 #include <scratch_buffer.h>
81 typedef ptrdiff_t idx_t
;
86 /* We often have to test for FNM_FILE_NAME and FNM_PERIOD being both set. */
87 #define NO_LEADING_PERIOD(flags) \
88 ((flags & (FNM_FILE_NAME | FNM_PERIOD)) == (FNM_FILE_NAME | FNM_PERIOD))
92 /* The OS usually guarantees only one guard page at the bottom of the stack,
93 and a page size can be as small as 4096 bytes. So we cannot safely
94 allocate anything larger than 4096 bytes. Also care for the possibility
95 of a few compiler-allocated temporary stack slots. */
96 # define __libc_use_alloca(n) ((n) < 4032)
98 /* Just use malloc. */
99 # define __libc_use_alloca(n) false
101 # define alloca(n) malloc (n)
103 # define alloca_account(size, avar) ((avar) += (size), alloca (size))
106 /* Provide support for user-defined character classes, based on the functions
107 from ISO C 90 amendment 1. */
108 #ifdef CHARCLASS_NAME_MAX
109 # define CHAR_CLASS_MAX_LENGTH CHARCLASS_NAME_MAX
111 /* This shouldn't happen but some implementation might still have this
112 problem. Use a reasonable default value. */
113 # define CHAR_CLASS_MAX_LENGTH 256
116 #define IS_CHAR_CLASS(string) wctype (string)
118 /* Avoid depending on library functions or files
119 whose names are inconsistent. */
121 /* Global variable. */
122 static int posixly_correct
;
124 /* Note that this evaluates C many times. */
125 #define FOLD(c) ((flags & FNM_CASEFOLD) ? tolower (c) : (c))
127 #define UCHAR unsigned char
129 #define FCT internal_fnmatch
130 #define EXT ext_match
131 #define END end_pattern
132 #define STRUCT fnmatch_struct
134 #define BTOWC(C) btowc (C)
135 #define STRLEN(S) strlen (S)
136 #define STRCAT(D, S) strcat (D, S)
137 #define MEMPCPY(D, S, N) mempcpy (D, S, N)
138 #define MEMCHR(S, C, N) memchr (S, C, N)
139 #define WIDE_CHAR_VERSION 0
141 # include <locale/weight.h>
142 # define FINDIDX findidx
144 #include "fnmatch_loop.c"
147 #define FOLD(c) ((flags & FNM_CASEFOLD) ? towlower (c) : (c))
151 #define FCT internal_fnwmatch
152 #define EXT ext_wmatch
153 #define END end_wpattern
156 #define STRLEN(S) wcslen (S)
157 #define STRCAT(D, S) wcscat (D, S)
158 #define MEMPCPY(D, S, N) wmempcpy (D, S, N)
159 #define MEMCHR(S, C, N) wmemchr (S, C, N)
160 #define WIDE_CHAR_VERSION 1
162 /* Change the name the header defines so it doesn't conflict with
163 the <locale/weight.h> version included above. */
164 # define findidx findidxwc
165 # include <locale/weightwc.h>
167 # define FINDIDX findidxwc
171 /* We have to convert the wide character string in a multibyte string. But
172 we know that the character class names consist of alphanumeric characters
173 from the portable character set, and since the wide character encoding
174 for a member of the portable character set is the same code point as
175 its single-byte encoding, we can use a simplified method to convert the
176 string to a multibyte character string. */
178 is_char_class (const wchar_t *wcs
)
180 char s
[CHAR_CLASS_MAX_LENGTH
+ 1];
185 /* Test for a printable character from the portable character set. */
187 if (*wcs
< 0x20 || *wcs
> 0x7e
188 || *wcs
== 0x24 || *wcs
== 0x40 || *wcs
== 0x60)
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
'+': case L
',': case L
'-': case L
'.': case L
'/':
196 case L
'0': case L
'1': case L
'2': case L
'3': case L
'4':
197 case L
'5': case L
'6': case L
'7': case L
'8': case L
'9':
198 case L
':': case L
';': case L
'<': case L
'=': case L
'>':
200 case L
'A': case L
'B': case L
'C': case L
'D': case L
'E':
201 case L
'F': case L
'G': case L
'H': case L
'I': case L
'J':
202 case L
'K': case L
'L': case L
'M': case L
'N': case L
'O':
203 case L
'P': case L
'Q': case L
'R': case L
'S': case L
'T':
204 case L
'U': case L
'V': case L
'W': case L
'X': case L
'Y':
206 case L
'[': case L
'\\': case L
']': case L
'^': case L
'_':
207 case L
'a': case L
'b': case L
'c': case L
'd': case L
'e':
208 case L
'f': case L
'g': case L
'h': case L
'i': case L
'j':
209 case L
'k': case L
'l': case L
'm': case L
'n': case L
'o':
210 case L
'p': case L
'q': case L
'r': case L
's': case L
't':
211 case L
'u': case L
'v': case L
'w': case L
'x': case L
'y':
212 case L
'z': case L
'{': case L
'|': case L
'}': case L
'~':
219 /* Avoid overrunning the buffer. */
220 if (cp
== s
+ CHAR_CLASS_MAX_LENGTH
)
223 *cp
++ = (char) *wcs
++;
225 while (*wcs
!= L
'\0');
231 #define IS_CHAR_CLASS(string) is_char_class (string)
233 #include "fnmatch_loop.c"
236 fnmatch_convert_to_wide (const char *str
, struct scratch_buffer
*buf
,
240 memset (&ps
, '\0', sizeof (ps
));
242 size_t nw
= buf
->length
/ sizeof (wchar_t);
243 *n
= strnlen (str
, nw
- 1);
244 if (__glibc_likely (*n
< nw
))
247 *n
= mbsrtowcs (buf
->data
, &p
, *n
+ 1, &ps
);
248 if (__glibc_unlikely (*n
== (size_t) -1))
250 XXX Do we have to set 'errno' to something which mbsrtows hasn't
255 memset (&ps
, '\0', sizeof (ps
));
258 *n
= mbsrtowcs (NULL
, &str
, 0, &ps
);
259 if (__glibc_unlikely (*n
== (size_t) -1))
261 if (!scratch_buffer_set_array_size (buf
, *n
+ 1, sizeof (wchar_t)))
263 __set_errno (ENOMEM
);
266 assert (mbsinit (&ps
));
267 mbsrtowcs (buf
->data
, &str
, *n
+ 1, &ps
);
272 fnmatch (const char *pattern
, const char *string
, int flags
)
274 if (__glibc_unlikely (MB_CUR_MAX
!= 1))
277 struct scratch_buffer wpattern
;
278 scratch_buffer_init (&wpattern
);
279 struct scratch_buffer wstring
;
280 scratch_buffer_init (&wstring
);
283 /* Convert the strings into wide characters. Any conversion issue
284 fallback to the ascii version. */
285 r
= fnmatch_convert_to_wide (pattern
, &wpattern
, &n
);
288 r
= fnmatch_convert_to_wide (string
, &wstring
, &n
);
290 r
= internal_fnwmatch (wpattern
.data
, wstring
.data
,
291 (wchar_t *) wstring
.data
+ n
,
292 flags
& FNM_PERIOD
, flags
, NULL
,
296 scratch_buffer_free (&wstring
);
297 scratch_buffer_free (&wpattern
);
299 if (r
== -2 || r
== 0)
303 return internal_fnmatch (pattern
, string
, string
+ strlen (string
),
304 flags
& FNM_PERIOD
, flags
, NULL
, 0);
308 versioned_symbol (libc
, __fnmatch
, fnmatch
, GLIBC_2_2_3
);
309 #if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_2_3)
310 strong_alias (__fnmatch
, __fnmatch_old
)
311 compat_symbol (libc
, __fnmatch_old
, fnmatch
, GLIBC_2_0
);
313 libc_hidden_ver (__fnmatch
, fnmatch
)