Annotation of src/lib/libc/gen/fnmatch.c, Revision 1.12
1.12 ! christos 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:
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
1.12 ! christos 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:
1.3 jtc 53: #include <fnmatch.h>
1.1 cgd 54: #include <string.h>
55:
56: #define EOS '\0'
57:
1.7 jtc 58: static const char *rangematch __P((const char *, int, int));
1.1 cgd 59:
1.9 jtc 60: int
1.1 cgd 61: fnmatch(pattern, string, flags)
1.11 cgd 62: const char *pattern, *string;
1.1 cgd 63: int flags;
64: {
1.11 cgd 65: const char *stringstart;
66: char c, test;
1.1 cgd 67:
1.11 cgd 68: for (stringstart = string;;)
1.1 cgd 69: switch (c = *pattern++) {
70: case EOS:
1.3 jtc 71: return (*string == EOS ? 0 : FNM_NOMATCH);
1.1 cgd 72: case '?':
1.8 jtc 73: if (*string == EOS)
1.3 jtc 74: return (FNM_NOMATCH);
1.8 jtc 75: if (*string == '/' && (flags & FNM_PATHNAME))
76: return (FNM_NOMATCH);
77: if (*string == '.' && (flags & FNM_PERIOD) &&
1.11 cgd 78: (string == stringstart ||
79: ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
1.8 jtc 80: return (FNM_NOMATCH);
81: ++string;
1.1 cgd 82: break;
83: case '*':
84: c = *pattern;
1.3 jtc 85: /* Collapse multiple stars. */
1.1 cgd 86: while (c == '*')
87: c = *++pattern;
88:
1.8 jtc 89: if (*string == '.' && (flags & FNM_PERIOD) &&
1.11 cgd 90: (string == stringstart ||
91: ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
1.8 jtc 92: return (FNM_NOMATCH);
93:
1.3 jtc 94: /* Optimize for pattern with * at end or before /. */
1.1 cgd 95: if (c == EOS)
96: if (flags & FNM_PATHNAME)
1.10 jtc 97: return (strchr(string, '/') == NULL ?
1.3 jtc 98: 0 : FNM_NOMATCH);
1.1 cgd 99: else
1.3 jtc 100: return (0);
101: else if (c == '/' && flags & FNM_PATHNAME) {
1.10 jtc 102: if ((string = strchr(string, '/')) == NULL)
1.3 jtc 103: return (FNM_NOMATCH);
1.1 cgd 104: break;
105: }
106:
1.3 jtc 107: /* General case, use recursion. */
1.1 cgd 108: while ((test = *string) != EOS) {
1.8 jtc 109: if (!fnmatch(pattern, string, flags & ~FNM_PERIOD))
1.3 jtc 110: return (0);
1.1 cgd 111: if (test == '/' && flags & FNM_PATHNAME)
112: break;
113: ++string;
114: }
1.3 jtc 115: return (FNM_NOMATCH);
1.1 cgd 116: case '[':
1.8 jtc 117: if (*string == EOS)
118: return (FNM_NOMATCH);
119: if (*string == '/' && flags & FNM_PATHNAME)
1.3 jtc 120: return (FNM_NOMATCH);
1.11 cgd 121: if ((pattern =
122: rangematch(pattern, *string, flags)) == NULL)
1.3 jtc 123: return (FNM_NOMATCH);
1.8 jtc 124: ++string;
1.1 cgd 125: break;
126: case '\\':
1.3 jtc 127: if (!(flags & FNM_NOESCAPE)) {
1.1 cgd 128: if ((c = *pattern++) == EOS) {
129: c = '\\';
130: --pattern;
131: }
132: }
133: /* FALLTHROUGH */
134: default:
135: if (c != *string++)
1.3 jtc 136: return (FNM_NOMATCH);
1.1 cgd 137: break;
138: }
1.3 jtc 139: /* NOTREACHED */
140: }
141:
142: static const char *
1.7 jtc 143: rangematch(pattern, test, flags)
1.11 cgd 144: const char *pattern;
145: int test, flags;
1.3 jtc 146: {
147: int negate, ok;
1.11 cgd 148: char c, c2;
1.3 jtc 149:
1.11 cgd 150: /*
151: * A bracket expression starting with an unquoted circumflex
1.7 jtc 152: * character produces unspecified results (IEEE 1003.2-1992,
1.11 cgd 153: * 3.13.2). This implementation treats it like '!', for
154: * consistency with the regular expression syntax.
155: * J.T. Conklin (conklin@ngai.kaleida.com)
1.3 jtc 156: */
1.12 ! christos 157: if ((negate = (*pattern == '!' || *pattern == '^')) != 0)
1.11 cgd 158: ++pattern;
1.7 jtc 159:
1.3 jtc 160: for (ok = 0; (c = *pattern++) != ']';) {
1.11 cgd 161: if (c == '\\' && !(flags & FNM_NOESCAPE))
1.7 jtc 162: c = *pattern++;
1.11 cgd 163: if (c == EOS)
1.7 jtc 164: return (NULL);
165: if (*pattern == '-'
166: && (c2 = *(pattern+1)) != EOS && c2 != ']') {
167: pattern += 2;
1.11 cgd 168: if (c2 == '\\' && !(flags & FNM_NOESCAPE))
1.7 jtc 169: c2 = *pattern++;
1.11 cgd 170: if (c2 == EOS)
1.7 jtc 171: return (NULL);
1.11 cgd 172: if (c <= test && test <= c2)
1.3 jtc 173: ok = 1;
1.11 cgd 174: } else if (c == test)
1.7 jtc 175: ok = 1;
1.3 jtc 176: }
177: return (ok == negate ? NULL : pattern);
1.1 cgd 178: }
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