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 * 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.
19 *
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
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 /*
34 * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6.
35 * Compares a filename or pathname to a pattern.
36 */
37
38 #define _GNU_SOURCE
39 #include <ctype.h>
40 #include <fnmatch.h>
41 #include <string.h>
42 #include <stdio.h>
43
44 #ifdef __HAVE_LOCALE_INFO__
45 #include "collate.h"
46 #endif
47
48 #define EOS '\0'
49
50 #define RANGE_MATCH 1
51 #define RANGE_NOMATCH 0
52 #define RANGE_ERROR (-1)
53
54 static int rangematch(const char *, char, int, char **);
55
56 int
fnmatch(const char * pattern,const char * string,int flags)57 fnmatch(const char *pattern, const char *string, int flags)
58 {
59 const char *stringstart;
60 char *newp;
61 char c, test;
62
63 for (stringstart = string;;)
64 switch (c = *pattern++) {
65 case EOS:
66 if ((flags & FNM_LEADING_DIR) && *string == '/')
67 return (0);
68 return (*string == EOS ? 0 : FNM_NOMATCH);
69 case '?':
70 if (*string == EOS)
71 return (FNM_NOMATCH);
72 if (*string == '/' && (flags & FNM_PATHNAME))
73 return (FNM_NOMATCH);
74 if (*string == '.' && (flags & FNM_PERIOD) &&
75 (string == stringstart ||
76 ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
77 return (FNM_NOMATCH);
78 ++string;
79 break;
80 case '*':
81 c = *pattern;
82 /* Collapse multiple stars. */
83 while (c == '*')
84 c = *++pattern;
85
86 if (*string == '.' && (flags & FNM_PERIOD) &&
87 (string == stringstart ||
88 ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
89 return (FNM_NOMATCH);
90
91 /* Optimize for pattern with * at end or before /. */
92 if (c == EOS)
93 if (flags & FNM_PATHNAME)
94 return ((flags & FNM_LEADING_DIR) ||
95 strchr(string, '/') == NULL ?
96 0 : FNM_NOMATCH);
97 else
98 return (0);
99 else if (c == '/' && flags & FNM_PATHNAME) {
100 if ((string = strchr(string, '/')) == NULL)
101 return (FNM_NOMATCH);
102 break;
103 }
104
105 /* General case, use recursion. */
106 while ((test = *string) != EOS) {
107 if (!fnmatch(pattern, string, flags & ~FNM_PERIOD))
108 return (0);
109 if (test == '/' && flags & FNM_PATHNAME)
110 break;
111 ++string;
112 }
113 return (FNM_NOMATCH);
114 case '[':
115 if (*string == EOS)
116 return (FNM_NOMATCH);
117 if (*string == '/' && (flags & FNM_PATHNAME))
118 return (FNM_NOMATCH);
119 if (*string == '.' && (flags & FNM_PERIOD) &&
120 (string == stringstart ||
121 ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
122 return (FNM_NOMATCH);
123
124 switch (rangematch(pattern, *string, flags, &newp)) {
125 case RANGE_ERROR:
126 goto norm;
127 case RANGE_MATCH:
128 pattern = newp;
129 break;
130 case RANGE_NOMATCH:
131 return (FNM_NOMATCH);
132 }
133 ++string;
134 break;
135 case '\\':
136 if (!(flags & FNM_NOESCAPE)) {
137 if ((c = *pattern++) == EOS) {
138 c = '\\';
139 --pattern;
140 }
141 }
142 __PICOLIBC_FALLTHROUGH;
143 default:
144 norm:
145 if (c == *string)
146 ;
147 else if ((flags & FNM_CASEFOLD) &&
148 (tolower((unsigned char)c) ==
149 tolower((unsigned char)*string)))
150 ;
151 else
152 return (FNM_NOMATCH);
153 string++;
154 break;
155 }
156 /* NOTREACHED */
157 }
158
159 static int
rangematch(const char * pattern,char test,int flags,char ** newp)160 rangematch(const char *pattern, char test, int flags, char **newp)
161 {
162 int negate, ok;
163 char c, c2;
164
165 /*
166 * A bracket expression starting with an unquoted circumflex
167 * character produces unspecified results (IEEE 1003.2-1992,
168 * 3.13.2). This implementation treats it like '!', for
169 * consistency with the regular expression syntax.
170 * J.T. Conklin (conklin@ngai.kaleida.com)
171 */
172 if ( (negate = (*pattern == '!' || *pattern == '^')) )
173 ++pattern;
174
175 if (flags & FNM_CASEFOLD)
176 test = tolower((unsigned char)test);
177
178 /*
179 * A right bracket shall lose its special meaning and represent
180 * itself in a bracket expression if it occurs first in the list.
181 * -- POSIX.2 2.8.3.2
182 */
183 ok = 0;
184 c = *pattern++;
185 do {
186 if (c == '\\' && !(flags & FNM_NOESCAPE))
187 c = *pattern++;
188 if (c == EOS)
189 return (RANGE_ERROR);
190
191 if (c == '/' && (flags & FNM_PATHNAME))
192 return (RANGE_NOMATCH);
193
194 if (flags & FNM_CASEFOLD)
195 c = tolower((unsigned char)c);
196
197 if (*pattern == '-'
198 && (c2 = *(pattern+1)) != EOS && c2 != ']') {
199 pattern += 2;
200 if (c2 == '\\' && !(flags & FNM_NOESCAPE))
201 c2 = *pattern++;
202 if (c2 == EOS)
203 return (RANGE_ERROR);
204
205 if (flags & FNM_CASEFOLD)
206 c2 = tolower((unsigned char)c2);
207
208 if (
209 #ifdef __HAVE_LOCALE_INFO__
210 __collate_load_error ?
211 c <= test && test <= c2 :
212 __collate_range_cmp(c, test) <= 0
213 && __collate_range_cmp(test, c2) <= 0
214 #else
215 c <= test && test <= c2
216 #endif
217 )
218 ok = 1;
219 } else if (c == test)
220 ok = 1;
221 } while ((c = *pattern++) != ']');
222
223 *newp = (char *)pattern;
224 return (ok == negate ? RANGE_NOMATCH : RANGE_MATCH);
225 }
226
