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36 * @(#)fnmatch.c 8.2 (Berkeley) 4/16/94
37 * $DragonFly: src/lib/libc/gen/fnmatch.c,v 1.6 2005/11/13 00:07:42 swildner Exp $
41 * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6.
42 * Compares a filename or pathname to a pattern.
55 #define RANGE_NOMATCH 0
56 #define RANGE_ERROR (-1)
58 static int rangematch (const char *, char, int, char **);
61 fnmatch(const char *pattern, const char *string, int flags)
63 const char *stringstart;
67 for (stringstart = string;;)
68 switch (c = *pattern++) {
70 if ((flags & FNM_LEADING_DIR) && *string == '/')
72 return (*string == EOS ? 0 : FNM_NOMATCH);
76 if (*string == '/' && (flags & FNM_PATHNAME))
78 if (*string == '.' && (flags & FNM_PERIOD) &&
79 (string == stringstart ||
80 ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
86 /* Collapse multiple stars. */
90 if (*string == '.' && (flags & FNM_PERIOD) &&
91 (string == stringstart ||
92 ((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 strchr(string, '/') == NULL ?
103 else if (c == '/' && flags & FNM_PATHNAME) {
104 if ((string = strchr(string, '/')) == NULL)
105 return (FNM_NOMATCH);
109 /* General case, use recursion. */
110 while ((test = *string) != EOS) {
111 if (!fnmatch(pattern, string, flags & ~FNM_PERIOD))
113 if (test == '/' && flags & FNM_PATHNAME)
117 return (FNM_NOMATCH);
120 return (FNM_NOMATCH);
121 if (*string == '/' && (flags & FNM_PATHNAME))
122 return (FNM_NOMATCH);
123 if (*string == '.' && (flags & FNM_PERIOD) &&
124 (string == stringstart ||
125 ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
126 return (FNM_NOMATCH);
128 switch (rangematch(pattern, *string, flags, &newp)) {
135 return (FNM_NOMATCH);
140 if (!(flags & FNM_NOESCAPE)) {
141 if ((c = *pattern++) == EOS) {
151 else if ((flags & FNM_CASEFOLD) &&
152 (tolower((unsigned char)c) ==
153 tolower((unsigned char)*string)))
156 return (FNM_NOMATCH);
164 rangematch(const char *pattern, char test, int flags, char **newp)
170 * A bracket expression starting with an unquoted circumflex
171 * character produces unspecified results (IEEE 1003.2-1992,
172 * 3.13.2). This implementation treats it like '!', for
173 * consistency with the regular expression syntax.
174 * J.T. Conklin (conklin@ngai.kaleida.com)
176 if ( (negate = (*pattern == '!' || *pattern == '^')) )
179 if (flags & FNM_CASEFOLD)
180 test = tolower((unsigned char)test);
183 * A right bracket shall lose its special meaning and represent
184 * itself in a bracket expression if it occurs first in the list.
190 if (c == '\\' && !(flags & FNM_NOESCAPE))
193 return (RANGE_ERROR);
195 if (c == '/' && (flags & FNM_PATHNAME))
196 return (RANGE_NOMATCH);
198 if (flags & FNM_CASEFOLD)
199 c = tolower((unsigned char)c);
202 && (c2 = *(pattern+1)) != EOS && c2 != ']') {
204 if (c2 == '\\' && !(flags & FNM_NOESCAPE))
207 return (RANGE_ERROR);
209 if (flags & FNM_CASEFOLD)
210 c2 = tolower((unsigned char)c2);
212 if (__collate_load_error ?
213 c <= test && test <= c2 :
214 __collate_range_cmp(c, test) <= 0
215 && __collate_range_cmp(test, c2) <= 0
218 } else if (c == test)
220 } while ((c = *pattern++) != ']');
222 *newp = __DECONST(char *, pattern);
223 return (ok == negate ? RANGE_NOMATCH : RANGE_MATCH);