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420 lines
12 KiB
C
420 lines
12 KiB
C
/* @(#)fnmatch.c 8.24 17/08/30 2005-2017 J. Schilling from 8.2 (Berkeley) */
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#include <schily/mconfig.h>
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#ifndef lint
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static UConst char sccsid[] =
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"@(#)fnmatch.c 8.24 17/08/30 2005-2017 J. Schilling from 8.2 (Berkeley)";
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#endif
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/*
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* Copyright (c) 1989, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Guido van Rossum.
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*
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* Copyright (c) 2005-2017 J. Schilling
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* Copyright (c) 2011 The FreeBSD Foundation
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* All rights reserved.
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* Portions of this software were developed by David Chisnall
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* under sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static UConst char sccsid[] = "@(#)fnmatch.c 8.24 (Berkeley) 08/30/17";
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#endif /* LIBC_SCCS and not lint */
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/* "FBSD src/lib/libc/gen/fnmatch.c,v 1.19 2010/04/16 22:29:24 jilles Exp $" */
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/*
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* Function fnmatch() as specified in POSIX 1003.2-1992, section B.6.
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* Compares a filename or pathname to a pattern.
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*/
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/*
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* Some notes on multibyte character support:
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* 1. Patterns with illegal byte sequences match nothing.
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* 2. Illegal byte sequences in the "string" argument are handled by treating
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* them as single-byte characters with a value of the first byte of the
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* sequence cast to wchar_t.
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* 3. Multibyte conversion state objects (mbstate_t) are passed around and
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* used for most, but not all, conversions. Further work will be required
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* to support state-dependent encodings.
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*/
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#include <schily/mconfig.h>
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#include <schily/fnmatch.h>
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#include <schily/limits.h>
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#include <schily/string.h>
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#include <schily/wchar.h>
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#include <schily/wctype.h>
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#include <schily/libport.h> /* Define missing prototypes */
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#define EOS '\0'
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#define RANGE_MATCH 1
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#define RANGE_NOMATCH 0
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#define RANGE_ERROR (-1)
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#define CL_SIZE 32 /* Max size for '[: :]' */
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static int rangematch __PR((const char *, wchar_t, int, char **, mbstate_t *));
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static int fnmatch1 __PR((const char *, const char *, const char *, int,
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mbstate_t, mbstate_t));
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#ifndef HAVE_FNMATCH
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#undef fnmatch
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/*
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* The Cygwin compile environment incorrectly implements #pragma weak.
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* The weak symbols are only defined as local symbols making it impossible
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* to use them from outside the scope of this source file.
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* A platform that allows linking with global symbols has HAVE_LINK_WEAK
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* defined.
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*/
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#if defined(HAVE_PRAGMA_WEAK) && defined(HAVE_LINK_WEAK)
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#pragma weak fnmatch = js_fnmatch
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#else
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int
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fnmatch(pattern, string, flags)
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const char *pattern;
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const char *string;
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int flags;
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{
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return (js_fnmatch(pattern, string, flags));
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}
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#endif
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#endif
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int
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js_fnmatch(pattern, string, flags)
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const char *pattern;
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const char *string;
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int flags;
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{
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/*
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* SunPro C gives a warning if we do not initialize an object:
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* static const mbstate_t initial;
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* GCC gives a warning if we try to initialize it.
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* As the POSIX standard forbids mbstate_t from being an array,
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* we do not need "const", the var is always copied when used as
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* a parapemeter for fnmatch1();
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*/
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static mbstate_t initial;
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return (fnmatch1(pattern, string, string, flags, initial, initial));
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}
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static int
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fnmatch1(pattern, string, stringstart, flags, patmbs, strmbs)
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const char *pattern;
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const char *string;
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const char *stringstart;
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int flags;
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mbstate_t patmbs;
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mbstate_t strmbs;
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{
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const char *bt_pattern, *bt_string;
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mbstate_t bt_patmbs, bt_strmbs;
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char *newp;
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char c;
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wchar_t pc, sc;
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size_t pclen, sclen;
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bt_pattern = bt_string = NULL;
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for (;;) {
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pclen = mbrtowc(&pc, pattern, MB_LEN_MAX, &patmbs);
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if (pclen == (size_t)-1 || pclen == (size_t)-2)
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return (FNM_NOMATCH);
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pattern += pclen;
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sclen = mbrtowc(&sc, string, MB_LEN_MAX, &strmbs);
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if (sclen == (size_t)-1 || sclen == (size_t)-2) {
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sc = (unsigned char)*string;
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sclen = 1;
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memset(&strmbs, 0, sizeof (strmbs));
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}
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switch (pc) {
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case EOS:
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if ((flags & FNM_LEADING_DIR) && sc == '/')
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return (0);
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if (sc == EOS)
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return (0);
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goto backtrack;
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case '?':
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if (sc == EOS)
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return (FNM_NOMATCH);
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if (sc == '/' && (flags & FNM_PATHNAME))
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goto backtrack;
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if (sc == '.' && (flags & FNM_PERIOD) &&
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(string == stringstart ||
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((flags & FNM_PATHNAME) && *(string - 1) == '/')))
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goto backtrack;
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string += sclen;
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break;
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case '*':
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c = *pattern;
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/* Collapse multiple stars. */
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while (c == '*')
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c = *++pattern;
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if (sc == '.' && (flags & FNM_PERIOD) &&
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(string == stringstart ||
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((flags & FNM_PATHNAME) && *(string - 1) == '/')))
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goto backtrack;
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/* Optimize for pattern with * at end or before /. */
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if (c == EOS) {
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if (flags & FNM_PATHNAME)
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return ((flags & FNM_LEADING_DIR) ||
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strchr(string, '/') == NULL ?
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0 : FNM_NOMATCH);
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else
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return (0);
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} else if (c == '/' && flags & FNM_PATHNAME) {
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if ((string = strchr(string, '/')) == NULL)
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return (FNM_NOMATCH);
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break;
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}
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/*
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* First try the shortest match for the '*' that
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* could work. We can forget any earlier '*' since
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* there is no way having it match more characters
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* can help us, given that we are already here.
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*/
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bt_pattern = pattern, bt_patmbs = patmbs;
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bt_string = string, bt_strmbs = strmbs;
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break;
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case '[':
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if (sc == EOS)
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return (FNM_NOMATCH);
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if (sc == '/' && (flags & FNM_PATHNAME))
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goto backtrack;
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if (sc == '.' && (flags & FNM_PERIOD) &&
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(string == stringstart ||
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((flags & FNM_PATHNAME) && *(string - 1) == '/')))
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goto backtrack;
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switch (rangematch(pattern, sc, flags, &newp,
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&patmbs)) {
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case RANGE_ERROR:
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goto norm;
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case RANGE_MATCH:
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pattern = newp;
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break;
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case RANGE_NOMATCH:
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goto backtrack;
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}
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string += sclen;
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break;
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case '\\':
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if (!(flags & FNM_NOESCAPE)) {
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pclen = mbrtowc(&pc, pattern, MB_LEN_MAX,
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&patmbs);
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if (pclen == (size_t)-1 || pclen == (size_t)-2)
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return (FNM_NOMATCH);
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if (pclen == 0)
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return (FNM_NOMATCH);
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pattern += pclen;
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}
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/* FALLTHROUGH */
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default:
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norm:
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string += sclen;
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if (pc == sc) {
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;
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} else if ((flags & FNM_CASEFOLD) &&
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(towlower(pc) == towlower(sc))) {
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;
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} else {
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backtrack:
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/*
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* If we have a mismatch (other than hitting
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* the end of the string), go back to the last
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* '*' seen and have it match one additional
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* character.
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*/
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if (bt_pattern == NULL)
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return (FNM_NOMATCH);
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sclen = mbrtowc(&sc, bt_string, MB_LEN_MAX,
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&bt_strmbs);
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if (sclen == (size_t)-1 ||
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sclen == (size_t)-2) {
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sc = (unsigned char)*bt_string;
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sclen = 1;
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memset(&bt_strmbs, 0,
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sizeof (bt_strmbs));
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}
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if (sc == EOS)
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return (FNM_NOMATCH);
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if (sc == '/' && flags & FNM_PATHNAME)
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return (FNM_NOMATCH);
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bt_string += sclen;
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pattern = bt_pattern, patmbs = bt_patmbs;
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string = bt_string, strmbs = bt_strmbs;
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}
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break;
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}
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}
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/* NOTREACHED */
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}
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#ifdef PROTOTYPES
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static int
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rangematch(const char *pattern, wchar_t test, int flags, char **newp,
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mbstate_t *patmbs)
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#else
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static int
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rangematch(pattern, test, flags, newp, patmbs)
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const char *pattern;
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wchar_t test;
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int flags;
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char **newp;
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mbstate_t *patmbs;
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#endif
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{
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int negate, ok;
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wchar_t c, c2;
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wchar_t otest = test;
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size_t pclen;
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const char *origpat;
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#ifdef XXX_COLLATE
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struct xlocale_collate *table = (struct xlocale_collate *)
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__get_locale()->components[XLC_COLLATE];
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#endif
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/*
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* A bracket expression starting with an unquoted circumflex
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* character produces unspecified results (IEEE 1003.2-1992,
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* 3.13.2). This implementation treats it like '!', for
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* consistency with the regular expression syntax.
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* J.T. Conklin (conklin@ngai.kaleida.com)
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*/
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if ((negate = (*pattern == '!' || *pattern == '^')))
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++pattern;
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if (flags & FNM_CASEFOLD)
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test = towlower(test);
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/*
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* A right bracket shall lose its special meaning and represent
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* itself in a bracket expression if it occurs first in the list.
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* -- POSIX.2 2.8.3.2
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*/
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ok = 0;
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origpat = pattern;
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for (;;) {
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int quoted = 0;
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if (*pattern == ']' && pattern > origpat) {
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pattern++;
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break;
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} else if (*pattern == '\0') {
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return (RANGE_ERROR);
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} else if (*pattern == '/' && (flags & FNM_PATHNAME)) {
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return (RANGE_NOMATCH);
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} else if (*pattern == '\\' && !(flags & FNM_NOESCAPE)) {
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pattern++;
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quoted++;
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}
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pclen = mbrtowc(&c, pattern, MB_LEN_MAX, patmbs);
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if (pclen == (size_t)-1 || pclen == (size_t)-2)
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return (RANGE_NOMATCH);
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pattern += pclen;
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if (!quoted && c == '[') {
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if (pattern[0] == ':') {
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char class[CL_SIZE+1];
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char *pc = class;
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const char *p;
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p = pattern + 1; /* Eat ':' */
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for (;;) {
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if (*p == '\0')
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return (RANGE_ERROR);
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if (*p == ':' && p[1] == ']')
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break;
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if (pc >= &class[CL_SIZE])
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return (RANGE_ERROR);
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*pc++ = *p++;
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}
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if (pc == class)
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return (RANGE_ERROR);
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*pc = '\0';
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pattern = p + 2; /* Skip ":]" */
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if (iswctype(otest, wctype(class))) {
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ok = 1;
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} else if (flags & FNM_CASEFOLD) {
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/*
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* Convert to the other case
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*/
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if (strcmp(class, "upper") == 0)
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if (iswctype(otest,
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wctype("lower")))
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ok = 1;
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else if (strcmp(class, "lower") == 0)
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if (iswctype(otest,
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wctype("upper")))
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ok = 1;
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}
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continue;
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}
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}
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if (flags & FNM_CASEFOLD)
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c = towlower(c);
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if (*pattern == '-' && *(pattern + 1) != EOS &&
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*(pattern + 1) != ']') {
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if (*++pattern == '\\' && !(flags & FNM_NOESCAPE))
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if (*pattern != EOS)
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pattern++;
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pclen = mbrtowc(&c2, pattern, MB_LEN_MAX, patmbs);
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if (pclen == (size_t)-1 || pclen == (size_t)-2)
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return (RANGE_NOMATCH);
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pattern += pclen;
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if (c2 == EOS)
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return (RANGE_ERROR);
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if (flags & FNM_CASEFOLD)
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c2 = towlower(c2);
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#ifdef XXX_COLLATE
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if (table->__collate_load_error ?
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c <= test && test <= c2 :
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__wcollate_range_cmp(c, test) <= 0 &&
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__wcollate_range_cmp(test, c2) <= 0)
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ok = 1;
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#else
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if (c <= test && test <= c2)
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ok = 1;
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#endif
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} else if (c == test)
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ok = 1;
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}
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*newp = (char *)pattern;
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return (ok == negate ? RANGE_NOMATCH : RANGE_MATCH);
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}
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