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/* $OpenBSD: wcstok.c,v 1.3 2005/08/08 08:05:37 espie Exp $ */
/* $NetBSD: wcstok.c,v 1.3 2003/07/10 08:50:48 tshiozak Exp $ */
/*-
* Copyright (c) 1998 Softweyr LLC. All rights reserved.
*
* strtok_r, from Berkeley strtok
* Oct 13, 1998 by Wes Peters <wes@softweyr.com>
*
* Copyright (c) 1988, 1993
* The Regents of the University of California. 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
* notices, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notices, 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 Softweyr LLC, 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 SOFTWEYR LLC, 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 SOFTWEYR LLC, 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.
*
* Original version ID:
* FreeBSD: src/lib/libc/string/wcstok.c,v 1.1 2002/09/07 08:16:57 tjr Exp
*/
#include <wchar.h>
wchar_t *
wcstok(wchar_t * __restrict s, const wchar_t * __restrict delim,
wchar_t ** __restrict last)
{
const wchar_t *spanp;
wchar_t c, sc;
wchar_t *tok;
if (s == NULL && (s = *last) == NULL)
return (NULL);
/*
* Skip (span) leading delimiters (s += wcsspn(s, delim), sort of).
*/
cont:
c = *s++;
for (spanp = delim; (sc = *spanp++) != L'\0';) {
if (c == sc)
goto cont;
}
if (c == L'\0') { /* no non-delimiter characters */
*last = NULL;
return (NULL);
}
tok = s - 1;
/*
* Scan token (scan for delimiters: s += wcscspn(s, delim), sort of).
* Note that delim must have one NUL; we stop if we see that, too.
*/
for (;;) {
c = *s++;
spanp = delim;
do {
if ((sc = *spanp++) == c) {
if (c == L'\0')
s = NULL;
else
s[-1] = L'\0';
*last = s;
return (tok);
}
} while (sc != L'\0');
}
/* NOTREACHED */
}
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