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
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9 * modification, are permitted provided that the following conditions
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12 * notice, this list of conditions and the following disclaimer.
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15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
37 * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6.
38 * Compares a filename or pathname to a pattern.
41 #include <sys/param.h>
42 #include <sys/ctype.h>
43 #include <sys/libkern.h>
48 #define RANGE_NOMATCH 0
49 #define RANGE_ERROR (-1)
51 static int rangematch(const char *, char, int, char **);
54 fnmatch(pattern, string, flags)
55 const char *pattern, *string;
58 const char *stringstart;
62 for (stringstart = string;;)
63 switch (c = *pattern++) {
65 if ((flags & FNM_LEADING_DIR) && *string == '/')
67 return (*string == EOS ? 0 : FNM_NOMATCH);
71 if (*string == '/' && (flags & FNM_PATHNAME))
73 if (*string == '.' && (flags & FNM_PERIOD) &&
74 (string == stringstart ||
75 ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
81 /* Collapse multiple stars. */
85 if (*string == '.' && (flags & FNM_PERIOD) &&
86 (string == stringstart ||
87 ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
90 /* Optimize for pattern with * at end or before /. */
92 if (flags & FNM_PATHNAME)
93 return ((flags & FNM_LEADING_DIR) ||
94 index(string, '/') == NULL ?
98 else if (c == '/' && flags & FNM_PATHNAME) {
99 if ((string = index(string, '/')) == NULL)
100 return (FNM_NOMATCH);
104 /* General case, use recursion. */
105 while ((test = *string) != EOS) {
106 if (!fnmatch(pattern, string, flags & ~FNM_PERIOD))
108 if (test == '/' && flags & FNM_PATHNAME)
112 return (FNM_NOMATCH);
115 return (FNM_NOMATCH);
116 if (*string == '/' && (flags & FNM_PATHNAME))
117 return (FNM_NOMATCH);
118 if (*string == '.' && (flags & FNM_PERIOD) &&
119 (string == stringstart ||
120 ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
121 return (FNM_NOMATCH);
123 switch (rangematch(pattern, *string, flags, &newp)) {
130 return (FNM_NOMATCH);
135 if (!(flags & FNM_NOESCAPE)) {
136 if ((c = *pattern++) == EOS) {
146 else if ((flags & FNM_CASEFOLD) &&
147 (tolower((unsigned char)c) ==
148 tolower((unsigned char)*string)))
151 return (FNM_NOMATCH);
159 rangematch(pattern, test, flags, newp)
169 * A bracket expression starting with an unquoted circumflex
170 * character produces unspecified results (IEEE 1003.2-1992,
171 * 3.13.2). This implementation treats it like '!', for
172 * consistency with the regular expression syntax.
173 * J.T. Conklin (conklin@ngai.kaleida.com)
175 if ( (negate = (*pattern == '!' || *pattern == '^')) )
178 if (flags & FNM_CASEFOLD)
179 test = tolower((unsigned char)test);
182 * A right bracket shall lose its special meaning and represent
183 * itself in a bracket expression if it occurs first in the list.
189 if (c == '\\' && !(flags & FNM_NOESCAPE))
192 return (RANGE_ERROR);
194 if (c == '/' && (flags & FNM_PATHNAME))
195 return (RANGE_NOMATCH);
197 if (flags & FNM_CASEFOLD)
198 c = tolower((unsigned char)c);
201 && (c2 = *(pattern+1)) != EOS && c2 != ']') {
203 if (c2 == '\\' && !(flags & FNM_NOESCAPE))
206 return (RANGE_ERROR);
208 if (flags & FNM_CASEFOLD)
209 c2 = tolower((unsigned char)c2);
211 if (c <= test && test <= c2)
213 } else if (c == test)
215 } while ((c = *pattern++) != ']');
217 *newp = (char *)(uintptr_t)pattern;
218 return (ok == negate ? RANGE_NOMATCH : RANGE_MATCH);