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/* $OpenBSD: wcstok.c,v 1.3 2005/08/08 08:05:37 espie Exp $ */ |
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/* $NetBSD: wcstok.c,v 1.3 2003/07/10 08:50:48 tshiozak Exp $ */ |
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/*- |
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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 <wchar.h> |
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wchar_t * |
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wcstok(wchar_t * __restrict s, const wchar_t * __restrict delim, |
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wchar_t ** __restrict 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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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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} |