77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
/* $NetBSD: wcsstr.c,v 1.4 2005/11/29 03:12:00 christos Exp $ */
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/*-
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* Copyright (c)1999 Citrus Project,
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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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* 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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* citrus Id: wcsstr.c,v 1.2 2000/12/21 05:07:25 itojun Exp
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: wcsstr.c,v 1.4 2005/11/29 03:12:00 christos Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include <assert.h>
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#include <wchar.h>
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wchar_t *
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#ifdef WCSWCS
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wcswcs(big, little)
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#else
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wcsstr(big, little)
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#endif
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const wchar_t *big;
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const wchar_t *little;
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{
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const wchar_t *p;
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const wchar_t *q;
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const wchar_t *r;
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_DIAGASSERT(big != NULL);
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_DIAGASSERT(little != NULL);
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if (!*little)
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return __UNCONST(big);
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if (wcslen(big) < wcslen(little))
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return NULL;
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p = big;
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q = little;
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while (*p) {
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q = little;
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r = p;
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while (*q) {
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if (*r != *q)
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break;
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q++;
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r++;
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}
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if (!*q)
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return __UNCONST(p);
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p++;
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}
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return NULL;
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}
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