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/*

* Copyright (C) the libgit2 contributors. All rights reserved.

*

* This file is part of libgit2, distributed under the GNU GPL v2 with

* a Linking Exception. For full terms see the included COPYING file.

*/

/*

* This file contains code originally derrived from OpenBSD fnmatch.c

*

* 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. 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 fnmatch() as specified in POSIX 1003.2-1992, section B.6.

* Compares a filename or pathname to a pattern.

*/

#include <ctype.h>

#include <stdio.h>

#include <string.h>

#include "fnmatch.h"

#define EOS '\0'

#define RANGE_MATCH 1

#define RANGE_NOMATCH 0

#define RANGE_ERROR (-1)

static int rangematch(const char *, char, int, char **);

static int

p_fnmatchx(const char *pattern, const char *string, int flags, size_t recurs)

{

const char *stringstart;

char *newp;

char c, test;

int recurs_flags = flags & ~FNM_PERIOD;

if (recurs-- == 0)

return FNM_NORES;

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;

/* Let '**' override PATHNAME match for this segment.

* It will be restored if/when we recurse below.

*/

if (c == '*') {

flags &= ~FNM_PATHNAME;

while (c == '*')

c = *++pattern;

if (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) {

int e;

e = p_fnmatchx(pattern, string, recurs_flags, recurs);

if (e != FNM_NOMATCH)

return e;

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 (*string == '.' && (flags & FNM_PERIOD) &&

(string == stringstart ||

((flags & FNM_PATHNAME) && *(string - 1) == '/')))

return (FNM_NOMATCH);

switch (rangematch(pattern, *string, flags, &newp)) {

case RANGE_ERROR:

/* not a good range, treat as normal text */

goto normal;

case RANGE_MATCH:

pattern = newp;

break;

case RANGE_NOMATCH:

return (FNM_NOMATCH);

}

++string;

break;

case '\\':

if (!(flags & FNM_NOESCAPE)) {

if ((c = *pattern++) == EOS) {

c = '\\';

--pattern;

}

}

/* FALLTHROUGH */

default:

normal:

if (c != *string && !((flags & FNM_CASEFOLD) &&

(tolower((unsigned char)c) ==

tolower((unsigned char)*string))))

return (FNM_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 == '^')) != 0)

++pattern;

if (flags & FNM_CASEFOLD)

test = (char)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 & FNM_NOESCAPE))

c = *pattern++;

if (c == EOS)

return (RANGE_ERROR);

if (c == '/' && (flags & FNM_PATHNAME))

return (RANGE_NOMATCH);

if ((flags & FNM_CASEFOLD))

c = (char)tolower((unsigned char)c);

if (*pattern == '-'

&& (c2 = *(pattern+1)) != EOS && c2 != ']') {

pattern += 2;

if (c2 == '\\' && !(flags & FNM_NOESCAPE))

c2 = *pattern++;

if (c2 == EOS)

return (RANGE_ERROR);

if (flags & FNM_CASEFOLD)

c2 = (char)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);

}

int

p_fnmatch(const char *pattern, const char *string, int flags)

{

return p_fnmatchx(pattern, string, flags, 64);

}