1/*
2 * Copyright (c) 1989, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Guido van Rossum.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#if defined(LIBC_SCCS) && !defined(lint)
38static char sccsid[] = "@(#)fnmatch.c 8.2 (Berkeley) 4/16/94";
39#endif /* LIBC_SCCS and not lint */
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40#include <sys/cdefs.h>
41__FBSDID("$FreeBSD: head/lib/libc/gen/fnmatch.c 90045 2002-02-01 01:32:19Z obrien $"); |
42
43/*
44 * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6.
45 * Compares a filename or pathname to a pattern.
46 */
47
48#include <ctype.h>
49#include <fnmatch.h>
50#include <string.h>
51#include <stdio.h>
52
53#include "collate.h"
54
55#define EOS '\0'
56
57#define RANGE_MATCH 1
58#define RANGE_NOMATCH 0
59#define RANGE_ERROR (-1)
60
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59static int rangematch __P((const char *, char, int, char **));
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| 61static int rangematch(const char *, char, int, char **); |
62
63int
64fnmatch(pattern, string, flags)
65 const char *pattern, *string;
66 int flags;
67{
68 const char *stringstart;
69 char *newp;
70 char c, test;
71
72 for (stringstart = string;;)
73 switch (c = *pattern++) {
74 case EOS:
75 if ((flags & FNM_LEADING_DIR) && *string == '/')
76 return (0);
77 return (*string == EOS ? 0 : FNM_NOMATCH);
78 case '?':
79 if (*string == EOS)
80 return (FNM_NOMATCH);
81 if (*string == '/' && (flags & FNM_PATHNAME))
82 return (FNM_NOMATCH);
83 if (*string == '.' && (flags & FNM_PERIOD) &&
84 (string == stringstart ||
85 ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
86 return (FNM_NOMATCH);
87 ++string;
88 break;
89 case '*':
90 c = *pattern;
91 /* Collapse multiple stars. */
92 while (c == '*')
93 c = *++pattern;
94
95 if (*string == '.' && (flags & FNM_PERIOD) &&
96 (string == stringstart ||
97 ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
98 return (FNM_NOMATCH);
99
100 /* Optimize for pattern with * at end or before /. */
101 if (c == EOS)
102 if (flags & FNM_PATHNAME)
103 return ((flags & FNM_LEADING_DIR) ||
104 strchr(string, '/') == NULL ?
105 0 : FNM_NOMATCH);
106 else
107 return (0);
108 else if (c == '/' && flags & FNM_PATHNAME) {
109 if ((string = strchr(string, '/')) == NULL)
110 return (FNM_NOMATCH);
111 break;
112 }
113
114 /* General case, use recursion. */
115 while ((test = *string) != EOS) {
116 if (!fnmatch(pattern, string, flags & ~FNM_PERIOD))
117 return (0);
118 if (test == '/' && flags & FNM_PATHNAME)
119 break;
120 ++string;
121 }
122 return (FNM_NOMATCH);
123 case '[':
124 if (*string == EOS)
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);
132
133 switch (rangematch(pattern, *string, flags, &newp)) {
134 case RANGE_ERROR:
135 goto norm;
136 case RANGE_MATCH:
137 pattern = newp;
138 break;
139 case RANGE_NOMATCH:
140 return (FNM_NOMATCH);
141 }
142 ++string;
143 break;
144 case '\\':
145 if (!(flags & FNM_NOESCAPE)) {
146 if ((c = *pattern++) == EOS) {
147 c = '\\';
148 --pattern;
149 }
150 }
151 /* FALLTHROUGH */
152 default:
153 norm:
154 if (c == *string)
155 ;
156 else if ((flags & FNM_CASEFOLD) &&
157 (tolower((unsigned char)c) ==
158 tolower((unsigned char)*string)))
159 ;
160 else
161 return (FNM_NOMATCH);
162 string++;
163 break;
164 }
165 /* NOTREACHED */
166}
167
168static int
169rangematch(pattern, test, flags, newp)
170 const char *pattern;
171 char test;
172 int flags;
173 char **newp;
174{
175 int negate, ok;
176 char c, c2;
177
178 /*
179 * A bracket expression starting with an unquoted circumflex
180 * character produces unspecified results (IEEE 1003.2-1992,
181 * 3.13.2). This implementation treats it like '!', for
182 * consistency with the regular expression syntax.
183 * J.T. Conklin (conklin@ngai.kaleida.com)
184 */
185 if ( (negate = (*pattern == '!' || *pattern == '^')) )
186 ++pattern;
187
188 if (flags & FNM_CASEFOLD)
189 test = tolower((unsigned char)test);
190
191 /*
192 * A right bracket shall lose its special meaning and represent
193 * itself in a bracket expression if it occurs first in the list.
194 * -- POSIX.2 2.8.3.2
195 */
196 ok = 0;
197 c = *pattern++;
198 do {
199 if (c == '\\' && !(flags & FNM_NOESCAPE))
200 c = *pattern++;
201 if (c == EOS)
202 return (RANGE_ERROR);
203
204 if (c == '/' && (flags & FNM_PATHNAME))
205 return (RANGE_NOMATCH);
206
207 if (flags & FNM_CASEFOLD)
208 c = tolower((unsigned char)c);
209
210 if (*pattern == '-'
211 && (c2 = *(pattern+1)) != EOS && c2 != ']') {
212 pattern += 2;
213 if (c2 == '\\' && !(flags & FNM_NOESCAPE))
214 c2 = *pattern++;
215 if (c2 == EOS)
216 return (RANGE_ERROR);
217
218 if (flags & FNM_CASEFOLD)
219 c2 = tolower((unsigned char)c2);
220
221 if (__collate_load_error ?
222 c <= test && test <= c2 :
223 __collate_range_cmp(c, test) <= 0
224 && __collate_range_cmp(test, c2) <= 0
225 )
226 ok = 1;
227 } else if (c == test)
228 ok = 1;
229 } while ((c = *pattern++) != ']');
230
231 *newp = (char *)pattern;
232 return (ok == negate ? RANGE_NOMATCH : RANGE_MATCH);
233}
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