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- /****************************************************************************
- * libs/libc/misc/lib_match.c - simple shell-style filename matcher
- *
- * Simple shell-style filename pattern matcher written by Jef Poskanzer
- * This pattern matcher only handles '?', '*' and '**', and multiple
- * patterns separated by '|'.
- *
- * Copyright © 1995, 2000 by Jef Poskanzer <jef@mail.acme.com>.
- * All rights reserved.
- *
- * With extensions by Ken Pettit.
- *
- * 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.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
- *
- ****************************************************************************/
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <string.h>
- #include <nuttx/lib/regex.h>
- /****************************************************************************
- * Private Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: match_one
- *
- * Description:
- * Does all of the work for one '|' delimited pattern
- *
- * Returned Value:
- * Returns 1 (match) or 0 (no-match).
- *
- ****************************************************************************/
- static int match_one(FAR const char *pattern, int patlen,
- FAR const char *string)
- {
- const char *p;
- char first;
- int pl;
- int i;
- for (p = pattern; p - pattern < patlen; p++, string++)
- {
- if (*p == '?' && *string != '\0')
- {
- continue;
- }
- /* Match single character from a set: "[a-zA-Z]" for instance */
- if (*p == '[' && *string != '\0')
- {
- i = 0;
- while (*p != ']' && *p != '\0')
- {
- p++;
- if (*string == *p)
- {
- /* Match found. Advance to the ']' */
- i = 1;
- while (*p != ']' && *p != '\0')
- {
- p++;
- }
- break;
- }
- /* Prepare to test for range */
- if (*p != '\0')
- {
- first = *p++;
- if (*p == '-')
- {
- p++;
- if (*string >= first && *string <= *p)
- {
- /* Match found. Advance to the ']' */
- i = 1;
- while (*p != ']' && *p != '\0')
- {
- p++;
- }
- break;
- }
- }
- }
- }
- /* We reuse 'i' above to indicate match found */
- if (i)
- {
- continue;
- }
- return 0;
- }
- if (*p == '*')
- {
- p++;
- if (*p == '*')
- {
- /* Double-wildcard matches anything. */
- p++;
- i = strlen(string);
- }
- else
- {
- /* Single-wildcard matches anything but slash. */
- i = strcspn(string, "/");
- }
- pl = patlen - (p - pattern);
- for (; i >= 0; i--)
- {
- if (match_one(p, pl, &(string[i])))
- {
- return 1;
- }
- }
- return 0;
- }
- if (*p != *string)
- {
- return 0;
- }
- }
- if (*string == '\0')
- {
- return 1;
- }
- return 0;
- }
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: match
- *
- * Description:
- * Simple shell-style filename pattern matcher originally written by
- * Jef Poskanzer and extended by Ken Pettit. This pattern matcher handles
- * '?', '*', '**', sets like [a-zA-z], and multiple patterns separated
- * by '|'.
- *
- * Returned Value:
- * Returns 1 (match) or 0 (no-match).
- *
- ****************************************************************************/
- int match(FAR const char *pattern, FAR const char *string)
- {
- const char *or;
- for (; ; )
- {
- or = strchr(pattern, '|');
- if (or == (char *)0)
- {
- return match_one(pattern, strlen(pattern), string);
- }
- if (match_one(pattern, or - pattern, string))
- {
- return 1;
- }
- pattern = or + 1;
- }
- }
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