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- /*-
- * Copyright (c) 1993
- * The Regents of the University of California. All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Paul Borman at Krystal Technologies.
- *
- * 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.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
- */
-
- #if defined(LIBC_SCCS) && !defined(lint)
- static char sccsid[] = "@(#)mbrune.c 8.1 (Berkeley) 6/27/93";
- #endif /* LIBC_SCCS and not lint */
-
- #include <limits.h>
- #include <rune.h>
- #include <stddef.h>
- #include <string.h>
-
- char *
- mbrune(string, c)
- const char *string;
- rune_t c;
- {
- char const *result;
- rune_t r;
-
- while ((r = sgetrune(string, MB_LEN_MAX, &result))) {
- if (r == c)
- return ((char *)string);
- string = result == string ? string + 1 : result;
- }
-
- return (c == *string ? (char *)string : NULL);
- }
-
- char *
- mbrrune(string, c)
- const char *string;
- rune_t c;
- {
- const char *last = 0;
- char const *result;
- rune_t r;
-
- while ((r = sgetrune(string, MB_LEN_MAX, &result))) {
- if (r == c)
- last = string;
- string = result == string ? string + 1 : result;
- }
- return (c == *string ? (char *)string : (char *)last);
- }
-
- char *
- mbmb(string, pattern)
- const char *string;
- char *pattern;
- {
- rune_t first, r;
- size_t plen, slen;
- char const *result;
-
- plen = strlen(pattern);
- slen = strlen(string);
- if (plen > slen)
- return (0);
-
- first = sgetrune(pattern, plen, &result);
- if (result == string)
- return (0);
-
- while (slen >= plen && (r = sgetrune(string, slen, &result))) {
- if (r == first) {
- if (strncmp(string, pattern, slen) == 0)
- return ((char *) string);
- }
- if (result == string) {
- --slen;
- ++string;
- } else {
- slen -= result - string;
- string = result;
- }
- }
- return (0);
- }
-