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      1 /*	$NetBSD: wcscspn.c,v 1.4 2011/11/24 18:44:25 joerg Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1999 Citrus Project,
      5  * Copyright (c) 2011 Joerg Sonnenberger,
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     27  * SUCH DAMAGE.
     28  *
     29  *	citrus Id: wcscspn.c,v 1.1 1999/12/29 21:47:45 tshiozak Exp
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __RCSID("$NetBSD: wcscspn.c,v 1.4 2011/11/24 18:44:25 joerg Exp $");
     34 
     35 #include <assert.h>
     36 #include <inttypes.h>
     37 #include <string.h>
     38 #include <wchar.h>
     39 
     40 #include "wcscspn_bloom.h"
     41 
     42 size_t
     43 wcscspn(const wchar_t *s, const wchar_t *set)
     44 {
     45 	size_t bloom[BLOOM_ARRAY_SIZE];
     46 	const wchar_t *p;
     47 	const wchar_t *q;
     48 
     49 	_DIAGASSERT(s != NULL);
     50 	_DIAGASSERT(set != NULL);
     51 
     52 	if (set[0] == '\0')
     53 		return wcslen(s);
     54 	if (set[1] == '\0') {
     55 		for (p = s; *p; ++p)
     56 			if (*p == set[0])
     57 				break;
     58 		return p - s;
     59 	}
     60 
     61 	wcsspn_bloom_init(bloom, set);
     62 
     63 	for (p = s; *p; ++p) {
     64 		if (!wcsspn_in_bloom(bloom, *p))
     65 			continue;
     66 
     67 		q = set;
     68 		do {
     69 			if (*p == *q)
     70 				goto done;
     71 		} while (*++q);
     72 	}
     73 
     74 done:
     75 	return (p - s);
     76 }
     77