NetBSD/lib/libc/gen/fnmatch.c

151 lines
4.3 KiB
C

/*
* Copyright (c) 1989 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Guido van Rossum.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)fnmatch.c 5.6 (Berkeley) 6/28/92";
#endif /* LIBC_SCCS and not lint */
/*
* Function fnmatch() as proposed in POSIX 1003.2 B.6 (D11.2).
* Compares a filename or pathname to a pattern.
*/
#include <fnmatch.h>
#include <string.h>
#define EOS '\0'
static const char *rangematch __P((const char *, int));
fnmatch(pattern, string, flags)
register const char *pattern, *string;
int flags;
{
register char c;
char test;
for (;;)
switch (c = *pattern++) {
case EOS:
return (*string == EOS ? 0 : FNM_NOMATCH);
case '?':
if ((test = *string++) == EOS ||
test == '/' && flags & FNM_PATHNAME)
return (FNM_NOMATCH);
break;
case '*':
c = *pattern;
/* Collapse multiple stars. */
while (c == '*')
c = *++pattern;
/* Optimize for pattern with * at end or before /. */
if (c == EOS)
if (flags & FNM_PATHNAME)
return (index(string, '/') == NULL ?
0 : FNM_NOMATCH);
else
return (0);
else if (c == '/' && flags & FNM_PATHNAME) {
if ((string = index(string, '/')) == NULL)
return (FNM_NOMATCH);
break;
}
/* General case, use recursion. */
while ((test = *string) != EOS) {
if (!fnmatch(pattern, string, flags))
return (0);
if (test == '/' && flags & FNM_PATHNAME)
break;
++string;
}
return (FNM_NOMATCH);
case '[':
if ((test = *string++) == EOS ||
test == '/' && flags & FNM_PATHNAME)
return (FNM_NOMATCH);
if ((pattern = rangematch(pattern, test)) == NULL)
return (FNM_NOMATCH);
break;
case '\\':
if (!(flags & FNM_NOESCAPE)) {
if ((c = *pattern++) == EOS) {
c = '\\';
--pattern;
}
if (c != *string++)
return (FNM_NOMATCH);
break;
}
/* FALLTHROUGH */
default:
if (c != *string++)
return (FNM_NOMATCH);
break;
}
/* NOTREACHED */
}
static const char *
rangematch(pattern, test)
register const char *pattern;
register int test;
{
register char c, c2;
int negate, ok;
if (negate = (*pattern == '!'))
++pattern;
/*
* XXX
* TO DO: quoting
*/
for (ok = 0; (c = *pattern++) != ']';) {
if (c == EOS)
return (NULL); /* Illegal pattern. */
if (*pattern == '-' && (c2 = pattern[1]) != EOS && c2 != ']') {
if (c <= test && test <= c2)
ok = 1;
pattern += 2;
}
else if (c == test)
ok = 1;
}
return (ok == negate ? NULL : pattern);
}