ossp-pkg/lmtp2nntp/shpat_match.c
1.4
/*
** Copyright (c) 2001 The OSSP Project <http://www.ossp.org/>
** Copyright (c) 2001 Cable & Wireless Deutschland <http://www.cw.com/de/>
**
** This file is part of OSSP lmtp2nntp, an LMTP speaking local
** mailer which forwards mails as Usenet news articles via NNTP.
** It can be found at http://www.ossp.org/pkg/lmtp2nntp/.
**
** This program is free software; you can redistribute it and/or
** modify it under the terms of the GNU General Public License
** as published by the Free Software Foundation; either version
** 2.0 of the License, or (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
** General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this file; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
** USA, or contact the OSSP project <ossp@ossp.org>.
**
** shpat_match.c: Shell Pattern Matching library
*/
/*
* Copyright (c) 1989, 1993, 1994
* 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.
*/
/*
* Function shpat_match() as specified in POSIX 1003.2-1992, section B.6.
* Compares a filename or pathname to a pattern.
*/
#include <ctype.h>
#include <string.h>
#include <stdio.h>
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#if defined(HAVE_DMALLOC_H) && defined(DMALLOC)
#include "dmalloc.h"
#endif
#include "shpat_match.h"
#define EOS '\0'
#define RANGE_MATCH 1
#define RANGE_NOMATCH 0
#define RANGE_ERROR (-1)
static int rangematch(const char *, char, int, char **);
int shpat_match(const char *pattern, const char *string, int flags)
{
const char *stringstart;
char *newp;
char c, test;
for (stringstart = string; ; ) {
switch (c = *pattern++) {
case EOS:
if ((flags & SHPAT_M_LEADING_DIR) && *string == '/')
return (0);
return (*string == EOS ? 0 : SHPAT_M_NOMATCH);
case '?':
if (*string == EOS)
return (SHPAT_M_NOMATCH);
if (*string == '/' && (flags & SHPAT_M_PATHNAME))
return (SHPAT_M_NOMATCH);
if (*string == '.' && (flags & SHPAT_M_PERIOD) &&
(string == stringstart ||
((flags & SHPAT_M_PATHNAME) && *(string - 1) == '/')))
return (SHPAT_M_NOMATCH);
++string;
break;
case '*':
c = *pattern;
/* Collapse multiple stars. */
while (c == '*')
c = *++pattern;
if (*string == '.' && (flags & SHPAT_M_PERIOD) &&
(string == stringstart ||
((flags & SHPAT_M_PATHNAME) && *(string - 1) == '/')))
return (SHPAT_M_NOMATCH);
/* Optimize for pattern with * at end or before /. */
if (c == EOS)
if (flags & SHPAT_M_PATHNAME)
return ((flags & SHPAT_M_LEADING_DIR) ||
strchr(string, '/') == NULL ?
0 : SHPAT_M_NOMATCH);
else
return (0);
else if (c == '/' && flags & SHPAT_M_PATHNAME) {
if ((string = strchr(string, '/')) == NULL)
return (SHPAT_M_NOMATCH);
break;
}
/* General case, use recursion. */
while ((test = *string) != EOS) {
if (!shpat_match(pattern, string, flags & ~SHPAT_M_PERIOD))
return (0);
if (test == '/' && flags & SHPAT_M_PATHNAME)
break;
++string;
}
return (SHPAT_M_NOMATCH);
case '[':
if (*string == EOS)
return (SHPAT_M_NOMATCH);
if (*string == '/' && (flags & SHPAT_M_PATHNAME))
return (SHPAT_M_NOMATCH);
if (*string == '.' && (flags & SHPAT_M_PERIOD) &&
(string == stringstart ||
((flags & SHPAT_M_PATHNAME) && *(string - 1) == '/')))
return (SHPAT_M_NOMATCH);
switch (rangematch(pattern, *string, flags, &newp)) {
case RANGE_ERROR:
goto norm;
case RANGE_MATCH:
pattern = newp;
break;
case RANGE_NOMATCH:
return (SHPAT_M_NOMATCH);
}
++string;
break;
case '\\':
if (!(flags & SHPAT_M_NOESCAPE)) {
if ((c = *pattern++) == EOS) {
c = '\\';
--pattern;
}
}
/* FALLTHROUGH */
default:
norm:
if (c == *string)
;
else if ((flags & SHPAT_M_CASEFOLD) &&
(tolower((unsigned char) c) ==
tolower((unsigned char) *string)))
;
else
return (SHPAT_M_NOMATCH);
string++;
break;
}
}
/* NOTREACHED */
}
static int rangematch(
const char *pattern,
char test,
int flags,
char **newp)
{
int negate, ok;
char c, c2;
/*
* A bracket expression starting with an unquoted circumflex
* character produces unspecified results (IEEE 1003.2-1992,
* 3.13.2). This implementation treats it like '!', for
* consistency with the regular expression syntax.
* J.T. Conklin (conklin@ngai.kaleida.com)
*/
if ((negate = (*pattern == '!' || *pattern == '^')))
++pattern;
if (flags & SHPAT_M_CASEFOLD)
test = tolower((unsigned char) test);
/*
* A right bracket shall lose its special meaning and represent
* itself in a bracket expression if it occurs first in the list.
* -- POSIX.2 2.8.3.2
*/
ok = 0;
c = *pattern++;
do {
if (c == '\\' && !(flags & SHPAT_M_NOESCAPE))
c = *pattern++;
if (c == EOS)
return (RANGE_ERROR);
if (c == '/' && (flags & SHPAT_M_PATHNAME))
return (RANGE_NOMATCH);
if (flags & SHPAT_M_CASEFOLD)
c = tolower((unsigned char) c);
if (*pattern == '-'
&& (c2 = *(pattern + 1)) != EOS && c2 != ']') {
pattern += 2;
if (c2 == '\\' && !(flags & SHPAT_M_NOESCAPE))
c2 = *pattern++;
if (c2 == EOS)
return (RANGE_ERROR);
if (flags & SHPAT_M_CASEFOLD)
c2 = tolower((unsigned char) c2);
if (c <= test && test <= c2)
ok = 1;
}
else if (c == test)
ok = 1;
} while ((c = *pattern++) != ']');
*newp = (char *) pattern;
return (ok == negate ? RANGE_NOMATCH : RANGE_MATCH);
}
/*
* This function returns non-zero if pattern
* contains any glob chars. Borrowed from Apache.
*/
int shpat_match_hasglobchar(const char *pattern)
{
int nesting;
nesting = 0;
while (*pattern) {
switch (*pattern) {
case '?':
case '*':
return 1;
case '\\':
if (*pattern++ == EOS)
return 0;
break;
case '[':
/* '[' is only a glob if it has a matching ']' */
nesting++;
break;
case ']':
if (nesting)
return 1;
break;
}
pattern++;
}
return 0;
}
