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36 * $FreeBSD: src/sys/libkern/fnmatch.c,v 1.17 2003/06/11 05:23:04 obrien Exp $
37 * $DragonFly: src/sys/libkern/fnmatch.c,v 1.2 2004/01/06 01:05:52 dillon Exp $
41 * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6.
42 * Compares a filename or pathname to a pattern.
45 #include <sys/param.h>
46 #include <sys/ctype.h>
47 #include <sys/libkern.h>
52 #define RANGE_NOMATCH 0
53 #define RANGE_ERROR (-1)
57 static int rangematch(const char *, char, int, char **);
60 _fnmatch(const char *pattern, const char *string, int flags, int nesting)
62 const char *stringstart;
66 if (nesting == MAXNEST)
69 for (stringstart = string;;) {
70 switch (c = *pattern++) {
72 if ((flags & FNM_LEADING_DIR) && *string == '/')
74 return (*string == EOS ? 0 : FNM_NOMATCH);
78 if (*string == '/' && (flags & FNM_PATHNAME))
80 if (*string == '.' && (flags & FNM_PERIOD) &&
81 (string == stringstart ||
82 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) {
89 /* Collapse multiple stars. */
93 if (*string == '.' && (flags & FNM_PERIOD) &&
94 (string == stringstart ||
95 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) {
99 /* Optimize for pattern with * at end or before /. */
101 if (flags & FNM_PATHNAME) {
102 return ((flags & FNM_LEADING_DIR) ||
103 index(string, '/') == NULL ?
108 } else if (c == '/' && flags & FNM_PATHNAME) {
109 if ((string = index(string, '/')) == NULL)
110 return (FNM_NOMATCH);
114 /* General case, use recursion. */
115 while ((test = *string) != EOS) {
116 if (!_fnmatch(pattern, string, flags & ~FNM_PERIOD, nesting + 1))
118 if (test == '/' && flags & FNM_PATHNAME)
122 return (FNM_NOMATCH);
125 return (FNM_NOMATCH);
126 if (*string == '/' && (flags & FNM_PATHNAME))
127 return (FNM_NOMATCH);
128 if (*string == '.' && (flags & FNM_PERIOD) &&
129 (string == stringstart ||
130 ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
131 return (FNM_NOMATCH);
133 switch (rangematch(pattern, *string, flags, &newp)) {
140 return (FNM_NOMATCH);
145 if (!(flags & FNM_NOESCAPE)) {
146 if ((c = *pattern++) == EOS) {
156 } else if ((flags & FNM_CASEFOLD) &&
157 (tolower((unsigned char)c) ==
158 tolower((unsigned char)*string))) {
161 return (FNM_NOMATCH);
171 rangematch(const char *pattern, char test, int flags, char **newp)
177 * A bracket expression starting with an unquoted circumflex
178 * character produces unspecified results (IEEE 1003.2-1992,
179 * 3.13.2). This implementation treats it like '!', for
180 * consistency with the regular expression syntax.
181 * J.T. Conklin (conklin@ngai.kaleida.com)
183 if ((negate = (*pattern == '!' || *pattern == '^')) != 0)
186 if (flags & FNM_CASEFOLD)
187 test = tolower((unsigned char)test);
190 * A right bracket shall lose its special meaning and represent
191 * itself in a bracket expression if it occurs first in the list.
197 if (c == '\\' && !(flags & FNM_NOESCAPE))
200 return (RANGE_ERROR);
202 if (c == '/' && (flags & FNM_PATHNAME))
203 return (RANGE_NOMATCH);
205 if (flags & FNM_CASEFOLD)
206 c = tolower((unsigned char)c);
209 && (c2 = *(pattern+1)) != EOS && c2 != ']') {
211 if (c2 == '\\' && !(flags & FNM_NOESCAPE))
214 return (RANGE_ERROR);
216 if (flags & FNM_CASEFOLD)
217 c2 = tolower((unsigned char)c2);
219 if (c <= test && test <= c2)
221 } else if (c == test) {
224 } while ((c = *pattern++) != ']');
226 *newp = (char *)(uintptr_t)pattern;
227 return (ok == negate ? RANGE_NOMATCH : RANGE_MATCH);