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skrzyp |
/* $NetBSD: fnmatch.c,v 1.21 2005/12/24 21:11:16 perry Exp $ */
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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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* 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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/*
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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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#include <cyg/infra/cyg_ass.h> // assertion macros
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#include <ctype.h>
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#include <fnmatch.h>
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#include <string.h>
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#define EOS '\0'
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static const char *rangematch(const char *, int, int);
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static inline int
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foldcase(int ch, int flags)
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{
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if ((flags & FNM_CASEFOLD) != 0 && isupper(ch))
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return (tolower(ch));
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return (ch);
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}
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#define FOLDCASE(ch, flags) foldcase((unsigned char)(ch), (flags))
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int
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fnmatch(const char *pattern, const char *string, int flags)
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{
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const char *stringstart;
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char c, test;
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CYG_ASSERT(pattern != NULL, "pattern NULL pointer!");
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CYG_ASSERT(string != NULL, "string NULL pointer!");
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for (stringstart = string;;)
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switch (c = FOLDCASE(*pattern++, flags)) {
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case EOS:
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if ((flags & FNM_LEADING_DIR) && *string == '/')
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return (0);
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return (*string == EOS ? 0 : FNM_NOMATCH);
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case '?':
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if (*string == EOS)
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return (FNM_NOMATCH);
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if (*string == '/' && (flags & FNM_PATHNAME))
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return (FNM_NOMATCH);
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if (*string == '.' && (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;
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break;
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case '*':
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c = FOLDCASE(*pattern, flags);
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/* Collapse multiple stars. */
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while (c == '*')
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c = FOLDCASE(*++pattern, flags);
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if (*string == '.' && (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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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 ((test = FOLDCASE(*string, flags)) != EOS) {
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if (!fnmatch(pattern, string,
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flags & ~FNM_PERIOD))
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return (0);
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if (test == '/' && flags & FNM_PATHNAME)
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break;
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++string;
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}
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return (FNM_NOMATCH);
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case '[':
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if (*string == EOS)
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return (FNM_NOMATCH);
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if (*string == '/' && flags & FNM_PATHNAME)
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return (FNM_NOMATCH);
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if ((pattern =
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rangematch(pattern, FOLDCASE(*string, flags),
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flags)) == NULL)
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return (FNM_NOMATCH);
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++string;
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break;
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case '\\':
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if (!(flags & FNM_NOESCAPE)) {
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if ((c = FOLDCASE(*pattern++, flags)) == EOS) {
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c = '\\';
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--pattern;
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}
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}
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/* FALLTHROUGH */
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default:
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if (c != FOLDCASE(*string++, flags))
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return (FNM_NOMATCH);
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break;
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}
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/* NOTREACHED */
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}
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static const char *
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rangematch(const char *pattern, int test, int flags)
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{
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int negate, ok;
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char c, c2;
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CYG_ASSERT(pattern != NULL, "pattern NULL pointer!");
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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 == '^')) != 0)
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++pattern;
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for (ok = 0; (c = FOLDCASE(*pattern++, flags)) != ']';) {
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if (c == '\\' && !(flags & FNM_NOESCAPE))
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c = FOLDCASE(*pattern++, flags);
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if (c == EOS)
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return (NULL);
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if (*pattern == '-'
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&& (c2 = FOLDCASE(*(pattern+1), flags)) != EOS &&
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c2 != ']') {
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pattern += 2;
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if (c2 == '\\' && !(flags & FNM_NOESCAPE))
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c2 = FOLDCASE(*pattern++, flags);
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if (c2 == EOS)
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return (NULL);
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if (c <= test && test <= c2)
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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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return (ok == negate ? NULL : pattern);
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}
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