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fnmatch.c revision 1.1.1.1 
      1 /*
      2  * Copyright (c) 1989 The Regents of the University of California.
      3  * 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  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the University of
     19  *	California, Berkeley and its contributors.
     20  * 4. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  */
     36 
     37 #if defined(LIBC_SCCS) && !defined(lint)
     38 static char sccsid[] = "@(#)fnmatch.c	5.4 (Berkeley) 2/23/91";
     39 #endif /* LIBC_SCCS and not lint */
     40 
     41 /*
     42  * Function fnmatch() as proposed in Posix 1003.2 B.6 (rev. 9).
     43  * Compares a filename or pathname to a pattern.
     44  */
     45 
     46 #include <unistd.h>
     47 #include <string.h>
     48 
     49 #define	EOS	'\0'
     50 
     51 static char *
     52 rangematch(pattern, test)
     53 	register char *pattern, test;
     54 {
     55 	register char c, c2;
     56 	int negate, ok;
     57 
     58 	if (negate = (*pattern == '!'))
     59 		++pattern;
     60 
     61 	/*
     62 	 * TO DO: quoting
     63 	 */
     64 
     65 	for (ok = 0; (c = *pattern++) != ']';) {
     66 		if (c == EOS)
     67 			return(NULL);		/* illegal pattern */
     68 		if (*pattern == '-' && (c2 = pattern[1]) != EOS && c2 != ']') {
     69 			if (c <= test && test <= c2)
     70 				ok = 1;
     71 			pattern += 2;
     72 		}
     73 		else if (c == test)
     74 			ok = 1;
     75 	}
     76 	return(ok == negate ? NULL : pattern);
     77 }
     78 
     79 fnmatch(pattern, string, flags)
     80 	register const char *pattern;
     81 	register const char *string;
     82 	int flags;
     83 {
     84 	register char c;
     85 	char test, *rangematch();
     86 
     87 	for (;;)
     88 		switch (c = *pattern++) {
     89 		case EOS:
     90 			return(*string == EOS);
     91 		case '?':
     92 			if ((test = *string++) == EOS ||
     93 			    test == '/' && flags & FNM_PATHNAME)
     94 				return(0);
     95 			break;
     96 		case '*':
     97 			c = *pattern;
     98 			/* collapse multiple stars */
     99 			while (c == '*')
    100 				c = *++pattern;
    101 
    102 			/* optimize for pattern with * at end or before / */
    103 			if (c == EOS)
    104 				if (flags & FNM_PATHNAME)
    105 					return(!index(string, '/'));
    106 				else
    107 					return(1);
    108 			else if (c == '/' && flags & FNM_PATHNAME) {
    109 				if ((string = index(string, '/')) == NULL)
    110 					return(0);
    111 				break;
    112 			}
    113 
    114 			/* general case, use recursion */
    115 			while ((test = *string) != EOS) {
    116 				if (fnmatch(pattern, string, flags))
    117 					return(1);
    118 				if (test == '/' && flags & FNM_PATHNAME)
    119 					break;
    120 				++string;
    121 			}
    122 			return(0);
    123 		case '[':
    124 			if ((test = *string++) == EOS ||
    125 			    test == '/' && flags & FNM_PATHNAME)
    126 				return(0);
    127 			if ((pattern = rangematch(pattern, test)) == NULL)
    128 				return(0);
    129 			break;
    130 		case '\\':
    131 			if (flags & FNM_QUOTE) {
    132 				if ((c = *pattern++) == EOS) {
    133 					c = '\\';
    134 					--pattern;
    135 				}
    136 				if (c != *string++)
    137 					return(0);
    138 				break;
    139 			}
    140 			/* FALLTHROUGH */
    141 		default:
    142 			if (c != *string++)
    143 				return(0);
    144 			break;
    145 		}
    146 }
    147