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- /*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * 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.
- */
- #include <sys/cdefs.h>
- __FBSDID("$FreeBSD$");
- /*
- * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6.
- * Compares a filename or pathname to a pattern.
- */
- #include <sys/param.h>
- #include <sys/ctype.h>
- #include <sys/libkern.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
- fnmatch(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 & 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 (*string == '.' && (flags & FNM_PERIOD) &&
- (string == stringstart ||
- ((flags & FNM_PATHNAME) && *(string - 1) == '/')))
- return (FNM_NOMATCH);
- switch (rangematch(pattern, *string, flags, &newp)) {
- case RANGE_ERROR:
- goto norm;
- 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:
- norm:
- if (c == *string)
- ;
- else if ((flags & FNM_CASEFOLD) &&
- (tolower((unsigned char)c) ==
- tolower((unsigned char)*string)))
- ;
- else
- 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 == '^')) )
- ++pattern;
- if (flags & FNM_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 & FNM_NOESCAPE))
- c = *pattern++;
- if (c == EOS)
- return (RANGE_ERROR);
- if (c == '/' && (flags & FNM_PATHNAME))
- return (RANGE_NOMATCH);
- 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 (RANGE_ERROR);
- if (flags & FNM_CASEFOLD)
- c2 = tolower((unsigned char)c2);
- if (c <= test && test <= c2)
- ok = 1;
- } else if (c == test)
- ok = 1;
- } while ((c = *pattern++) != ']');
- *newp = (char *)(uintptr_t)pattern;
- return (ok == negate ? RANGE_NOMATCH : RANGE_MATCH);
- }
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