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32 * $FreeBSD: src/sys/libkern/fnmatch.c,v 1.17 2003/06/11 05:23:04 obrien Exp $
33 * $DragonFly: src/sys/libkern/fnmatch.c,v 1.3 2006/12/13 21:58:51 dillon Exp $
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)
53 static int rangematch(const char *, char, int, char **);
56 _kfnmatch(const char *pattern, const char *string, int flags, int nesting)
58 const char *stringstart;
62 if (nesting == MAXNEST)
65 for (stringstart = string;;) {
66 switch (c = *pattern++) {
68 if ((flags & FNM_LEADING_DIR) && *string == '/')
70 return (*string == EOS ? 0 : FNM_NOMATCH);
74 if (*string == '/' && (flags & FNM_PATHNAME))
76 if (*string == '.' && (flags & FNM_PERIOD) &&
77 (string == stringstart ||
78 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) {
85 /* Collapse multiple stars. */
89 if (*string == '.' && (flags & FNM_PERIOD) &&
90 (string == stringstart ||
91 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) {
95 /* Optimize for pattern with * at end or before /. */
97 if (flags & FNM_PATHNAME) {
98 return ((flags & FNM_LEADING_DIR) ||
99 index(string, '/') == NULL ?
104 } else if (c == '/' && flags & FNM_PATHNAME) {
105 if ((string = index(string, '/')) == NULL)
106 return (FNM_NOMATCH);
110 /* General case, use recursion. */
111 while ((test = *string) != EOS) {
112 if (!_kfnmatch(pattern, string, flags & ~FNM_PERIOD, nesting + 1))
114 if (test == '/' && flags & FNM_PATHNAME)
118 return (FNM_NOMATCH);
121 return (FNM_NOMATCH);
122 if (*string == '/' && (flags & FNM_PATHNAME))
123 return (FNM_NOMATCH);
124 if (*string == '.' && (flags & FNM_PERIOD) &&
125 (string == stringstart ||
126 ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
127 return (FNM_NOMATCH);
129 switch (rangematch(pattern, *string, flags, &newp)) {
136 return (FNM_NOMATCH);
141 if (!(flags & FNM_NOESCAPE)) {
142 if ((c = *pattern++) == EOS) {
152 } else if ((flags & FNM_CASEFOLD) &&
153 (tolower((unsigned char)c) ==
154 tolower((unsigned char)*string))) {
157 return (FNM_NOMATCH);
167 rangematch(const char *pattern, char test, int flags, char **newp)
173 * A bracket expression starting with an unquoted circumflex
174 * character produces unspecified results (IEEE 1003.2-1992,
175 * 3.13.2). This implementation treats it like '!', for
176 * consistency with the regular expression syntax.
177 * J.T. Conklin (conklin@ngai.kaleida.com)
179 if ((negate = (*pattern == '!' || *pattern == '^')) != 0)
182 if (flags & FNM_CASEFOLD)
183 test = tolower((unsigned char)test);
186 * A right bracket shall lose its special meaning and represent
187 * itself in a bracket expression if it occurs first in the list.
193 if (c == '\\' && !(flags & FNM_NOESCAPE))
196 return (RANGE_ERROR);
198 if (c == '/' && (flags & FNM_PATHNAME))
199 return (RANGE_NOMATCH);
201 if (flags & FNM_CASEFOLD)
202 c = tolower((unsigned char)c);
205 && (c2 = *(pattern+1)) != EOS && c2 != ']') {
207 if (c2 == '\\' && !(flags & FNM_NOESCAPE))
210 return (RANGE_ERROR);
212 if (flags & FNM_CASEFOLD)
213 c2 = tolower((unsigned char)c2);
215 if (c <= test && test <= c2)
217 } else if (c == test) {
220 } while ((c = *pattern++) != ']');
222 *newp = (char *)(uintptr_t)pattern;
223 return (ok == negate ? RANGE_NOMATCH : RANGE_MATCH);