292 lines
8.1 KiB
C
292 lines
8.1 KiB
C
/*
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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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* 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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* 4. 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 char sccsid[] = "@(#)fnmatch.c 8.2 (Berkeley) 4/16/94";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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 <fnmatch.h>
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#include <limits.h>
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#include <string.h>
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#include <wchar.h>
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#include <wctype.h>
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#include "collate.h"
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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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static int rangematch(const char *, wchar_t, int, char **, mbstate_t *);
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static int fnmatch1(const char *, const char *, int, mbstate_t, mbstate_t);
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int
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fnmatch(pattern, string, flags)
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const char *pattern, *string;
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int flags;
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{
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static const mbstate_t initial;
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return (fnmatch1(pattern, string, flags, initial, initial));
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}
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static int
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fnmatch1(pattern, string, flags, patmbs, strmbs)
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const char *pattern, *string;
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int flags;
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mbstate_t patmbs, strmbs;
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{
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const char *stringstart;
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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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for (stringstart = string;;) {
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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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return (sc == EOS ? 0 : FNM_NOMATCH);
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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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return (FNM_NOMATCH);
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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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return (FNM_NOMATCH);
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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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return (FNM_NOMATCH);
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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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/* General case, use recursion. */
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while (sc != EOS) {
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if (!fnmatch1(pattern, string,
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flags & ~FNM_PERIOD, patmbs, strmbs))
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return (0);
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sclen = mbrtowc(&sc, string, MB_LEN_MAX,
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&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)*string;
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sclen = 1;
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memset(&strmbs, 0, sizeof(strmbs));
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}
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if (sc == '/' && flags & FNM_PATHNAME)
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break;
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string += sclen;
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}
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return (FNM_NOMATCH);
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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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return (FNM_NOMATCH);
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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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return (FNM_NOMATCH);
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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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return (FNM_NOMATCH);
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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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pc = '\\';
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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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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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return (FNM_NOMATCH);
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string += sclen;
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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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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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{
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int negate, ok;
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wchar_t c, c2;
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size_t pclen;
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const char *origpat;
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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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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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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 (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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if (__collate_load_error ?
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c <= test && test <= c2 :
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__collate_range_cmp(c, test) <= 0
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&& __collate_range_cmp(test, c2) <= 0
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)
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ok = 1;
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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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