206 lines
8.5 KiB
C
206 lines
8.5 KiB
C
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/* $OpenBSD: fnmatch.c,v 1.13 2006/03/31 05:34:14 deraadt 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 <ctype.h>
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#include <stdio.h>
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#include <string.h>
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#include <fnmatch.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 *, char, int, char **);
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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 *newp;
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char c, test;
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for (stringstart = string;;)
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switch (c = *pattern++) {
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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 = *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 (*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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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 ((test = *string) != EOS) {
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if (!fnmatch(pattern, string, 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 (*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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switch (rangematch(pattern, *string, flags, &newp)) {
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case RANGE_ERROR:
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/* not a good range, treat as normal text */
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goto normal;
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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;
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break;
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case '\\':
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if (!(flags & FNM_NOESCAPE)) {
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if ((c = *pattern++) == 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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normal:
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if (c != *string && !((flags & FNM_CASEFOLD) &&
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(tolower((unsigned char)c) ==
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tolower((unsigned char)*string))))
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return (FNM_NOMATCH);
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++string;
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break;
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}
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/* NOTREACHED */
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}
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static int
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rangematch(const char *pattern, char test, int flags, char **newp)
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{
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int negate, ok;
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char c, c2;
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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 = (char)tolower((unsigned char)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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c = *pattern++;
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do {
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if (c == '\\' && !(flags & FNM_NOESCAPE))
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c = *pattern++;
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if (c == EOS)
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return (RANGE_ERROR);
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if (c == '/' && (flags & FNM_PATHNAME))
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return (RANGE_NOMATCH);
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if ((flags & FNM_CASEFOLD))
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c = (char)tolower((unsigned char)c);
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if (*pattern == '-'
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&& (c2 = *(pattern+1)) != EOS && c2 != ']') {
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pattern += 2;
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if (c2 == '\\' && !(flags & FNM_NOESCAPE))
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c2 = *pattern++;
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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 = (char)tolower((unsigned char)c2);
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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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} while ((c = *pattern++) != ']');
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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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