149 lines
4.3 KiB
C
149 lines
4.3 KiB
C
/****************************************************************************
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* match.c - simple shell-style filename matcher
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*
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* Simple shell-style filename pattern matcher written by Jef Poskanzer
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* This pattern matcher only handles '?', '*' and '**', and multiple
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* patterns separated by '|'.
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*
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* Copyright © 1995,2000 by Jef Poskanzer <jef@mail.acme.com>.
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* All rights reserved.
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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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*
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <string.h>
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#include <nuttx/regex.h>
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: match_one
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*
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* Description:
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* Does all of the work for one '|' delimited pattern
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*
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* Returned Value:
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* Returns 1 (match) or 0 (no-match).
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*
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****************************************************************************/
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static int match_one(const char *pattern, int patlen, const char *string)
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{
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const char *p;
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int pl;
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int i;
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for (p = pattern; p - pattern < patlen; p++, string++)
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{
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if (*p == '?' && *string != '\0')
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{
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continue;
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}
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if (*p == '*')
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{
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p++;
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if (*p == '*')
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{
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/* Double-wildcard matches anything. */
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p++;
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i = strlen(string);
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}
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else
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{
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/* Single-wildcard matches anything but slash. */
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i = strcspn(string, "/");
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}
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pl = patlen - (p - pattern);
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for (; i >= 0; i--)
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{
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if (match_one(p, pl, &(string[i])))
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{
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return 1;
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}
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}
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return 0;
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}
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if (*p != *string)
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{
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return 0;
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}
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}
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if (*string == '\0')
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{
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return 1;
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}
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return 0;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: match
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*
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* Description:
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* Simple shell-style filename pattern matcher written by Jef Poskanzer
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* This pattern matcher only handles '?', '*' and '**', and multiple
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* patterns separated by '|'.
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*
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* Returned Value:
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* Returns 1 (match) or 0 (no-match).
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*
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****************************************************************************/
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int match(const char *pattern, const char *string)
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{
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const char *or;
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for (;;)
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{
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or = strchr(pattern, '|');
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if (or == (char *)0)
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{
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return match_one(pattern, strlen(pattern), string);
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}
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if (match_one(pattern, or - pattern, string))
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{
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return 1;
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}
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pattern = or + 1;
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}
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}
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