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