fnmatch.c

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/*
 * 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.
 *
 * From FreeBSD fnmatch.c 1.11
 */
 
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)fnmatch.c   8.2 (Berkeley) 4/16/94";
#endif /* LIBC_SCCS and not lint */
 
/*
 * Function fnmatch() 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>
 
#include "fnmatch.h"
 
#define EOS '\0'
 
static const char *rangematch(const char *, char, int);
 
PHPAPI int fnmatch(const char *pattern, const char *string, int flags)
{
    const char *stringstart;
    char c, test;
 
    for (stringstart = string;;)
        switch (c = *pattern++) {
        case EOS:
            if ((flags & FNM_LEADING_DIR) && *string == '/')
                return (0);
            return (*string == EOS ? 0 : FNM_NOMATCH);
        case '?':
            if (*string == EOS)
                return (FNM_NOMATCH);
            if (*string == '/' && (flags & FNM_PATHNAME))
                return (FNM_NOMATCH);
            if (*string == '.' && (flags & FNM_PERIOD) &&
                (string == stringstart ||
                ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
                return (FNM_NOMATCH);
            ++string;
            break;
        case '*':
            c = *pattern;
            /* Collapse multiple stars. */
            while (c == '*')
                c = *++pattern;
 
            if (*string == '.' && (flags & FNM_PERIOD) &&
                (string == stringstart ||
                ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
                return (FNM_NOMATCH);
 
            /* Optimize for pattern with * at end or before /. */
            if (c == EOS)
                if (flags & FNM_PATHNAME)
                    return ((flags & FNM_LEADING_DIR) ||
                        strchr(string, '/') == NULL ?
                        0 : FNM_NOMATCH);
                else
                    return (0);
            else if (c == '/' && flags & FNM_PATHNAME) {
                if ((string = strchr(string, '/')) == NULL)
                    return (FNM_NOMATCH);
                break;
            }
 
            /* General case, use recursion. */
            while ((test = *string) != EOS) {
                if (!fnmatch(pattern, string, flags & ~FNM_PERIOD))
                    return (0);
                if (test == '/' && flags & FNM_PATHNAME)
                    break;
                ++string;
            }
            return (FNM_NOMATCH);
        case '[':
            if (*string == EOS)
                return (FNM_NOMATCH);
            if (*string == '/' && flags & FNM_PATHNAME)
                return (FNM_NOMATCH);
            if ((pattern =
                rangematch(pattern, *string, flags)) == NULL)
                return (FNM_NOMATCH);
            ++string;
            break;
        case '\\':
            if (!(flags & FNM_NOESCAPE)) {
                if ((c = *pattern++) == EOS) {
                    c = '\\';
                    --pattern;
                }
            }
            /* FALLTHROUGH */
        default:
            if (c == *string)
                ;
            else if ((flags & FNM_CASEFOLD) &&
                 (tolower((unsigned char)c) ==
                  tolower((unsigned char)*string)))
                ;
            else if ((flags & FNM_PREFIX_DIRS) && *string == EOS &&
                 (c == '/' && string != stringstart ||
                 string == stringstart+1 && *stringstart == '/') )
                return (0);
            else
                return (FNM_NOMATCH);
            string++;
            break;
        }
    /* NOTREACHED */
}
 
static const char *
rangematch(const char *pattern, char test, int flags)
{
    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 & FNM_CASEFOLD)
        test = tolower((unsigned char)test);
 
    for (ok = 0; (c = *pattern++) != ']';) {
        if (c == '\\' && !(flags & FNM_NOESCAPE))
            c = *pattern++;
        if (c == EOS)
            return (NULL);
 
        if (flags & FNM_CASEFOLD)
            c = tolower((unsigned char)c);
 
        if (*pattern == '-'
            && (c2 = *(pattern+1)) != EOS && c2 != ']') {
            pattern += 2;
            if (c2 == '\\' && !(flags & FNM_NOESCAPE))
                c2 = *pattern++;
            if (c2 == EOS)
                return (NULL);
 
            if (flags & FNM_CASEFOLD)
                c2 = tolower((unsigned char)c2);
 
            if ((unsigned char)c <= (unsigned char)test &&
                (unsigned char)test <= (unsigned char)c2)
                ok = 1;
        } else if (c == test)
            ok = 1;
    }
    return (ok == negate ? NULL : pattern);
}