Annotation of src/lib/libc/gen/fnmatch.c, Revision 1.18.2.1
1.18.2.1! nathanw 1: /* $NetBSD$ */
1.11 cgd 2:
1.1 cgd 3: /*
1.11 cgd 4: * Copyright (c) 1989, 1993, 1994
1.6 cgd 5: * The Regents of the University of California. All rights reserved.
1.1 cgd 6: *
7: * This code is derived from software contributed to Berkeley by
8: * Guido van Rossum.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: * 3. All advertising materials mentioning features or use of this software
19: * must display the following acknowledgement:
20: * This product includes software developed by the University of
21: * California, Berkeley and its contributors.
22: * 4. Neither the name of the University nor the names of its contributors
23: * may be used to endorse or promote products derived from this software
24: * without specific prior written permission.
25: *
26: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36: * SUCH DAMAGE.
37: */
38:
1.12 christos 39: #include <sys/cdefs.h>
1.1 cgd 40: #if defined(LIBC_SCCS) && !defined(lint)
1.11 cgd 41: #if 0
42: static char sccsid[] = "@(#)fnmatch.c 8.2 (Berkeley) 4/16/94";
43: #else
1.18.2.1! nathanw 44: __RCSID("$NetBSD$");
1.11 cgd 45: #endif
1.1 cgd 46: #endif /* LIBC_SCCS and not lint */
47:
48: /*
1.7 jtc 49: * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6.
1.1 cgd 50: * Compares a filename or pathname to a pattern.
51: */
52:
1.13 jtc 53: #include "namespace.h"
1.15 lukem 54:
55: #include <assert.h>
1.18 thorpej 56: #include <ctype.h>
1.3 jtc 57: #include <fnmatch.h>
1.1 cgd 58: #include <string.h>
1.13 jtc 59:
60: #ifdef __weak_alias
1.17 mycroft 61: __weak_alias(fnmatch,_fnmatch)
1.13 jtc 62: #endif
1.1 cgd 63:
64: #define EOS '\0'
65:
1.7 jtc 66: static const char *rangematch __P((const char *, int, int));
1.1 cgd 67:
1.18 thorpej 68: static __inline int
69: foldcase(int ch, int flags)
70: {
71:
72: if ((flags & FNM_CASEFOLD) != 0 && isupper(ch))
73: return (tolower(ch));
74: return (ch);
75: }
76:
77: #define FOLDCASE(ch, flags) foldcase((unsigned char)(ch), (flags))
78:
1.9 jtc 79: int
1.1 cgd 80: fnmatch(pattern, string, flags)
1.11 cgd 81: const char *pattern, *string;
1.1 cgd 82: int flags;
83: {
1.11 cgd 84: const char *stringstart;
85: char c, test;
1.1 cgd 86:
1.15 lukem 87: _DIAGASSERT(pattern != NULL);
88: _DIAGASSERT(string != NULL);
89:
1.11 cgd 90: for (stringstart = string;;)
1.18 thorpej 91: switch (c = FOLDCASE(*pattern++, flags)) {
1.1 cgd 92: case EOS:
1.18.2.1! nathanw 93: if ((flags & FNM_LEADING_DIR) && *string == '/')
! 94: return (0);
1.3 jtc 95: return (*string == EOS ? 0 : FNM_NOMATCH);
1.1 cgd 96: case '?':
1.8 jtc 97: if (*string == EOS)
1.3 jtc 98: return (FNM_NOMATCH);
1.8 jtc 99: if (*string == '/' && (flags & FNM_PATHNAME))
100: return (FNM_NOMATCH);
101: if (*string == '.' && (flags & FNM_PERIOD) &&
1.11 cgd 102: (string == stringstart ||
103: ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
1.8 jtc 104: return (FNM_NOMATCH);
105: ++string;
1.1 cgd 106: break;
107: case '*':
1.18 thorpej 108: c = FOLDCASE(*pattern, flags);
1.3 jtc 109: /* Collapse multiple stars. */
1.1 cgd 110: while (c == '*')
1.18 thorpej 111: c = FOLDCASE(*++pattern, flags);
1.1 cgd 112:
1.8 jtc 113: if (*string == '.' && (flags & FNM_PERIOD) &&
1.11 cgd 114: (string == stringstart ||
115: ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
1.8 jtc 116: return (FNM_NOMATCH);
117:
1.3 jtc 118: /* Optimize for pattern with * at end or before /. */
1.14 christos 119: if (c == EOS) {
1.1 cgd 120: if (flags & FNM_PATHNAME)
1.18.2.1! nathanw 121: return ((flags & FNM_LEADING_DIR) ||
! 122: strchr(string, '/') == NULL ?
1.3 jtc 123: 0 : FNM_NOMATCH);
1.1 cgd 124: else
1.3 jtc 125: return (0);
1.14 christos 126: } else if (c == '/' && flags & FNM_PATHNAME) {
1.10 jtc 127: if ((string = strchr(string, '/')) == NULL)
1.3 jtc 128: return (FNM_NOMATCH);
1.1 cgd 129: break;
130: }
131:
1.3 jtc 132: /* General case, use recursion. */
1.18 thorpej 133: while ((test = FOLDCASE(*string, flags)) != EOS) {
134: if (!fnmatch(pattern, string,
135: flags & ~FNM_PERIOD))
1.3 jtc 136: return (0);
1.1 cgd 137: if (test == '/' && flags & FNM_PATHNAME)
138: break;
139: ++string;
140: }
1.3 jtc 141: return (FNM_NOMATCH);
1.1 cgd 142: case '[':
1.8 jtc 143: if (*string == EOS)
144: return (FNM_NOMATCH);
145: if (*string == '/' && flags & FNM_PATHNAME)
1.3 jtc 146: return (FNM_NOMATCH);
1.11 cgd 147: if ((pattern =
1.18 thorpej 148: rangematch(pattern, FOLDCASE(*string, flags),
149: flags)) == NULL)
1.3 jtc 150: return (FNM_NOMATCH);
1.8 jtc 151: ++string;
1.1 cgd 152: break;
153: case '\\':
1.3 jtc 154: if (!(flags & FNM_NOESCAPE)) {
1.18 thorpej 155: if ((c = FOLDCASE(*pattern++, flags)) == EOS) {
1.1 cgd 156: c = '\\';
157: --pattern;
158: }
159: }
160: /* FALLTHROUGH */
161: default:
1.18 thorpej 162: if (c != FOLDCASE(*string++, flags))
1.3 jtc 163: return (FNM_NOMATCH);
1.1 cgd 164: break;
165: }
1.3 jtc 166: /* NOTREACHED */
167: }
168:
169: static const char *
1.7 jtc 170: rangematch(pattern, test, flags)
1.11 cgd 171: const char *pattern;
172: int test, flags;
1.3 jtc 173: {
174: int negate, ok;
1.11 cgd 175: char c, c2;
1.15 lukem 176:
177: _DIAGASSERT(pattern != NULL);
1.3 jtc 178:
1.11 cgd 179: /*
180: * A bracket expression starting with an unquoted circumflex
1.7 jtc 181: * character produces unspecified results (IEEE 1003.2-1992,
1.11 cgd 182: * 3.13.2). This implementation treats it like '!', for
183: * consistency with the regular expression syntax.
184: * J.T. Conklin (conklin@ngai.kaleida.com)
1.3 jtc 185: */
1.12 christos 186: if ((negate = (*pattern == '!' || *pattern == '^')) != 0)
1.11 cgd 187: ++pattern;
1.7 jtc 188:
1.18 thorpej 189: for (ok = 0; (c = FOLDCASE(*pattern++, flags)) != ']';) {
1.11 cgd 190: if (c == '\\' && !(flags & FNM_NOESCAPE))
1.18 thorpej 191: c = FOLDCASE(*pattern++, flags);
1.11 cgd 192: if (c == EOS)
1.7 jtc 193: return (NULL);
194: if (*pattern == '-'
1.18 thorpej 195: && (c2 = FOLDCASE(*(pattern+1), flags)) != EOS &&
196: c2 != ']') {
1.7 jtc 197: pattern += 2;
1.11 cgd 198: if (c2 == '\\' && !(flags & FNM_NOESCAPE))
1.18 thorpej 199: c2 = FOLDCASE(*pattern++, flags);
1.11 cgd 200: if (c2 == EOS)
1.7 jtc 201: return (NULL);
1.11 cgd 202: if (c <= test && test <= c2)
1.3 jtc 203: ok = 1;
1.11 cgd 204: } else if (c == test)
1.7 jtc 205: ok = 1;
1.3 jtc 206: }
207: return (ok == negate ? NULL : pattern);
1.1 cgd 208: }
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