Annotation of src/lib/libc/gen/fnmatch.c, Revision 1.11.4.1
1.11.4.1! jtc 1: /* $NetBSD: fnmatch.c,v 1.11 1995/02/27 03:43:06 cgd Exp $ */
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:
39: #if defined(LIBC_SCCS) && !defined(lint)
1.11 cgd 40: #if 0
41: static char sccsid[] = "@(#)fnmatch.c 8.2 (Berkeley) 4/16/94";
42: #else
1.11.4.1! jtc 43: static char rcsid[] = "$NetBSD: fnmatch.c,v 1.11 1995/02/27 03:43:06 cgd Exp $";
1.11 cgd 44: #endif
1.1 cgd 45: #endif /* LIBC_SCCS and not lint */
46:
47: /*
1.7 jtc 48: * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6.
1.1 cgd 49: * Compares a filename or pathname to a pattern.
50: */
51:
1.11.4.1! jtc 52: #include "namespace.h"
1.3 jtc 53: #include <fnmatch.h>
1.1 cgd 54: #include <string.h>
1.11.4.1! jtc 55:
! 56: #ifdef __weak_alias
! 57: __weak_alias(fnmatch,_fnmatch);
! 58: #endif
1.1 cgd 59:
60: #define EOS '\0'
61:
1.7 jtc 62: static const char *rangematch __P((const char *, int, int));
1.1 cgd 63:
1.9 jtc 64: int
1.1 cgd 65: fnmatch(pattern, string, flags)
1.11 cgd 66: const char *pattern, *string;
1.1 cgd 67: int flags;
68: {
1.11 cgd 69: const char *stringstart;
70: char c, test;
1.1 cgd 71:
1.11 cgd 72: for (stringstart = string;;)
1.1 cgd 73: switch (c = *pattern++) {
74: case EOS:
1.3 jtc 75: return (*string == EOS ? 0 : FNM_NOMATCH);
1.1 cgd 76: case '?':
1.8 jtc 77: if (*string == EOS)
1.3 jtc 78: return (FNM_NOMATCH);
1.8 jtc 79: if (*string == '/' && (flags & FNM_PATHNAME))
80: return (FNM_NOMATCH);
81: if (*string == '.' && (flags & FNM_PERIOD) &&
1.11 cgd 82: (string == stringstart ||
83: ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
1.8 jtc 84: return (FNM_NOMATCH);
85: ++string;
1.1 cgd 86: break;
87: case '*':
88: c = *pattern;
1.3 jtc 89: /* Collapse multiple stars. */
1.1 cgd 90: while (c == '*')
91: c = *++pattern;
92:
1.8 jtc 93: if (*string == '.' && (flags & FNM_PERIOD) &&
1.11 cgd 94: (string == stringstart ||
95: ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
1.8 jtc 96: return (FNM_NOMATCH);
97:
1.3 jtc 98: /* Optimize for pattern with * at end or before /. */
1.1 cgd 99: if (c == EOS)
100: if (flags & FNM_PATHNAME)
1.10 jtc 101: return (strchr(string, '/') == NULL ?
1.3 jtc 102: 0 : FNM_NOMATCH);
1.1 cgd 103: else
1.3 jtc 104: return (0);
105: else if (c == '/' && flags & FNM_PATHNAME) {
1.10 jtc 106: if ((string = strchr(string, '/')) == NULL)
1.3 jtc 107: return (FNM_NOMATCH);
1.1 cgd 108: break;
109: }
110:
1.3 jtc 111: /* General case, use recursion. */
1.1 cgd 112: while ((test = *string) != EOS) {
1.8 jtc 113: if (!fnmatch(pattern, string, flags & ~FNM_PERIOD))
1.3 jtc 114: return (0);
1.1 cgd 115: if (test == '/' && flags & FNM_PATHNAME)
116: break;
117: ++string;
118: }
1.3 jtc 119: return (FNM_NOMATCH);
1.1 cgd 120: case '[':
1.8 jtc 121: if (*string == EOS)
122: return (FNM_NOMATCH);
123: if (*string == '/' && flags & FNM_PATHNAME)
1.3 jtc 124: return (FNM_NOMATCH);
1.11 cgd 125: if ((pattern =
126: rangematch(pattern, *string, flags)) == NULL)
1.3 jtc 127: return (FNM_NOMATCH);
1.8 jtc 128: ++string;
1.1 cgd 129: break;
130: case '\\':
1.3 jtc 131: if (!(flags & FNM_NOESCAPE)) {
1.1 cgd 132: if ((c = *pattern++) == EOS) {
133: c = '\\';
134: --pattern;
135: }
136: }
137: /* FALLTHROUGH */
138: default:
139: if (c != *string++)
1.3 jtc 140: return (FNM_NOMATCH);
1.1 cgd 141: break;
142: }
1.3 jtc 143: /* NOTREACHED */
144: }
145:
146: static const char *
1.7 jtc 147: rangematch(pattern, test, flags)
1.11 cgd 148: const char *pattern;
149: int test, flags;
1.3 jtc 150: {
151: int negate, ok;
1.11 cgd 152: char c, c2;
1.3 jtc 153:
1.11 cgd 154: /*
155: * A bracket expression starting with an unquoted circumflex
1.7 jtc 156: * character produces unspecified results (IEEE 1003.2-1992,
1.11 cgd 157: * 3.13.2). This implementation treats it like '!', for
158: * consistency with the regular expression syntax.
159: * J.T. Conklin (conklin@ngai.kaleida.com)
1.3 jtc 160: */
1.11 cgd 161: if (negate = (*pattern == '!' || *pattern == '^'))
162: ++pattern;
1.7 jtc 163:
1.3 jtc 164: for (ok = 0; (c = *pattern++) != ']';) {
1.11 cgd 165: if (c == '\\' && !(flags & FNM_NOESCAPE))
1.7 jtc 166: c = *pattern++;
1.11 cgd 167: if (c == EOS)
1.7 jtc 168: return (NULL);
169: if (*pattern == '-'
170: && (c2 = *(pattern+1)) != EOS && c2 != ']') {
171: pattern += 2;
1.11 cgd 172: if (c2 == '\\' && !(flags & FNM_NOESCAPE))
1.7 jtc 173: c2 = *pattern++;
1.11 cgd 174: if (c2 == EOS)
1.7 jtc 175: return (NULL);
1.11 cgd 176: if (c <= test && test <= c2)
1.3 jtc 177: ok = 1;
1.11 cgd 178: } else if (c == test)
1.7 jtc 179: ok = 1;
1.3 jtc 180: }
181: return (ok == negate ? NULL : pattern);
1.1 cgd 182: }
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