2 * Copyright (c) 1989, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
8 * Copyright (c) 2011 The FreeBSD Foundation
10 * Portions of this software were developed by David Chisnall
11 * under sponsorship from the FreeBSD Foundation.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 #if defined(LIBC_SCCS) && !defined(lint)
39 static char sccsid[] = "@(#)fnmatch.c 8.2 (Berkeley) 4/16/94";
40 #endif /* LIBC_SCCS and not lint */
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
45 * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6.
46 * Compares a filename or pathname to a pattern.
50 * Some notes on multibyte character support:
51 * 1. Patterns with illegal byte sequences match nothing.
52 * 2. Illegal byte sequences in the "string" argument are handled by treating
53 * them as single-byte characters with a value of the first byte of the
54 * sequence cast to wchar_t.
55 * 3. Multibyte conversion state objects (mbstate_t) are passed around and
56 * used for most, but not all, conversions. Further work will be required
57 * to support state-dependent encodings.
71 #define RANGE_NOMATCH 0
72 #define RANGE_ERROR (-1)
74 static int rangematch(const char *, wchar_t, int, char **, mbstate_t *);
75 static int fnmatch1(const char *, const char *, const char *, int, mbstate_t,
79 fnmatch(const char *pattern, const char *string, int flags)
81 static const mbstate_t initial;
83 return (fnmatch1(pattern, string, string, flags, initial, initial));
87 fnmatch1(const char *pattern, const char *string, const char *stringstart,
88 int flags, mbstate_t patmbs, mbstate_t strmbs)
96 pclen = mbrtowc(&pc, pattern, MB_LEN_MAX, &patmbs);
97 if (pclen == (size_t)-1 || pclen == (size_t)-2)
100 sclen = mbrtowc(&sc, string, MB_LEN_MAX, &strmbs);
101 if (sclen == (size_t)-1 || sclen == (size_t)-2) {
102 sc = (unsigned char)*string;
104 memset(&strmbs, 0, sizeof(strmbs));
108 if ((flags & FNM_LEADING_DIR) && sc == '/')
110 return (sc == EOS ? 0 : FNM_NOMATCH);
113 return (FNM_NOMATCH);
114 if (sc == '/' && (flags & FNM_PATHNAME))
115 return (FNM_NOMATCH);
116 if (sc == '.' && (flags & FNM_PERIOD) &&
117 (string == stringstart ||
118 ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
119 return (FNM_NOMATCH);
124 /* Collapse multiple stars. */
128 if (sc == '.' && (flags & FNM_PERIOD) &&
129 (string == stringstart ||
130 ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
131 return (FNM_NOMATCH);
133 /* Optimize for pattern with * at end or before /. */
135 if (flags & FNM_PATHNAME)
136 return ((flags & FNM_LEADING_DIR) ||
137 strchr(string, '/') == NULL ?
141 else if (c == '/' && flags & FNM_PATHNAME) {
142 if ((string = strchr(string, '/')) == NULL)
143 return (FNM_NOMATCH);
147 /* General case, use recursion. */
149 if (!fnmatch1(pattern, string, stringstart,
150 flags, patmbs, strmbs))
152 sclen = mbrtowc(&sc, string, MB_LEN_MAX,
154 if (sclen == (size_t)-1 ||
155 sclen == (size_t)-2) {
156 sc = (unsigned char)*string;
158 memset(&strmbs, 0, sizeof(strmbs));
160 if (sc == '/' && flags & FNM_PATHNAME)
164 return (FNM_NOMATCH);
167 return (FNM_NOMATCH);
168 if (sc == '/' && (flags & FNM_PATHNAME))
169 return (FNM_NOMATCH);
170 if (sc == '.' && (flags & FNM_PERIOD) &&
171 (string == stringstart ||
172 ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
173 return (FNM_NOMATCH);
175 switch (rangematch(pattern, sc, flags, &newp,
183 return (FNM_NOMATCH);
188 if (!(flags & FNM_NOESCAPE)) {
189 pclen = mbrtowc(&pc, pattern, MB_LEN_MAX,
191 if (pclen == (size_t)-1 || pclen == (size_t)-2)
192 return (FNM_NOMATCH);
200 else if ((flags & FNM_CASEFOLD) &&
201 (towlower(pc) == towlower(sc)))
204 return (FNM_NOMATCH);
213 rangematch(const char *pattern, wchar_t test, int flags, char **newp,
220 struct xlocale_collate *table =
221 (struct xlocale_collate*)__get_locale()->components[XLC_COLLATE];
224 * A bracket expression starting with an unquoted circumflex
225 * character produces unspecified results (IEEE 1003.2-1992,
226 * 3.13.2). This implementation treats it like '!', for
227 * consistency with the regular expression syntax.
228 * J.T. Conklin (conklin@ngai.kaleida.com)
230 if ( (negate = (*pattern == '!' || *pattern == '^')) )
233 if (flags & FNM_CASEFOLD)
234 test = towlower(test);
237 * A right bracket shall lose its special meaning and represent
238 * itself in a bracket expression if it occurs first in the list.
244 if (*pattern == ']' && pattern > origpat) {
247 } else if (*pattern == '\0') {
248 return (RANGE_ERROR);
249 } else if (*pattern == '/' && (flags & FNM_PATHNAME)) {
250 return (RANGE_NOMATCH);
251 } else if (*pattern == '\\' && !(flags & FNM_NOESCAPE))
253 pclen = mbrtowc(&c, pattern, MB_LEN_MAX, patmbs);
254 if (pclen == (size_t)-1 || pclen == (size_t)-2)
255 return (RANGE_NOMATCH);
258 if (flags & FNM_CASEFOLD)
261 if (*pattern == '-' && *(pattern + 1) != EOS &&
262 *(pattern + 1) != ']') {
263 if (*++pattern == '\\' && !(flags & FNM_NOESCAPE))
266 pclen = mbrtowc(&c2, pattern, MB_LEN_MAX, patmbs);
267 if (pclen == (size_t)-1 || pclen == (size_t)-2)
268 return (RANGE_NOMATCH);
271 return (RANGE_ERROR);
273 if (flags & FNM_CASEFOLD)
276 if (table->__collate_load_error ?
277 c <= test && test <= c2 :
278 __collate_range_cmp(table, c, test) <= 0
279 && __collate_range_cmp(table, test, c2) <= 0
282 } else if (c == test)
286 *newp = (char *)pattern;
287 return (ok == negate ? RANGE_NOMATCH : RANGE_MATCH);