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Diffstat (limited to 'nuttx/libc/misc/lib_match.c')
-rw-r--r-- | nuttx/libc/misc/lib_match.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/nuttx/libc/misc/lib_match.c b/nuttx/libc/misc/lib_match.c new file mode 100644 index 000000000..a8cfad329 --- /dev/null +++ b/nuttx/libc/misc/lib_match.c @@ -0,0 +1,148 @@ +/**************************************************************************** + * 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. + * + * 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/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(const char *pattern, int patlen, const char *string) +{ + const char *p; + int pl; + int i; + + for (p = pattern; p - pattern < patlen; p++, string++) + { + if (*p == '?' && *string != '\0') + { + continue; + } + + 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 written by Jef Poskanzer + * This pattern matcher only handles '?', '*' and '**', and multiple + * patterns separated by '|'. + * + * Returned Value: + * Returns 1 (match) or 0 (no-match). + * + ****************************************************************************/ + +int match(const char *pattern, 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; + } +} + |