95 lines
3.0 KiB
C
95 lines
3.0 KiB
C
/*-
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* Copyright (c) 1998 Softweyr LLC. All rights reserved.
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*
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* strtok_r, from Berkeley strtok
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* Oct 13, 1998 by Wes Peters <wes@softweyr.com>
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*
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* Copyright (c) 1988, 1993
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* The Regents of the University of California. 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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* notices, 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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* notices, 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Softweyr LLC, the
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* University of California, Berkeley, and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY SOFTWEYR LLC, THE REGENTS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SOFTWEYR LLC, THE
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* REGENTS, OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Original version ID:
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* FreeBSD: src/lib/libc/string/wcstok.c,v 1.1 2002/09/07 08:16:57 tjr Exp
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*/
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#include <assert.h>
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#include <wchar.h>
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wchar_t *
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wcstok(wchar_t *s, const wchar_t *delim, wchar_t **last)
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{
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const wchar_t *spanp;
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wchar_t c, sc;
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wchar_t *tok;
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/* s may be NULL */
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assert(delim != NULL);
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assert(last != NULL);
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if (s == NULL && (s = *last) == NULL)
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return (NULL);
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/*
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* Skip (span) leading delimiters (s += wcsspn(s, delim), sort of).
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*/
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cont:
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c = *s++;
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for (spanp = delim; (sc = *spanp++) != L'\0';) {
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if (c == sc)
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goto cont;
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}
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if (c == L'\0') { /* no non-delimiter characters */
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*last = NULL;
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return (NULL);
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}
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tok = s - 1;
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/*
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* Scan token (scan for delimiters: s += wcscspn(s, delim), sort of).
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* Note that delim must have one NUL; we stop if we see that, too.
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*/
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for (;;) {
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c = *s++;
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spanp = delim;
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do {
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if ((sc = *spanp++) == c) {
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if (c == L'\0')
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s = NULL;
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else
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s[-1] = L'\0';
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*last = s;
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return (tok);
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}
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} while (sc != L'\0');
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}
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/* NOTREACHED */
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}
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