1 /* $OpenBSD: wcstok.c,v 1.3 2005/08/08 08:05:37 espie Exp $ */ 2 /* $NetBSD: wcstok.c,v 1.3 2003/07/10 08:50:48 tshiozak Exp $ */ 3 4 /*- 5 * Copyright (c) 1998 Softweyr LLC. All rights reserved. 6 * 7 * strtok_r, from Berkeley strtok 8 * Oct 13, 1998 by Wes Peters <wes@softweyr.com> 9 * 10 * Copyright (c) 1988, 1993 11 * The Regents of the University of California. All rights reserved. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notices, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notices, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by Softweyr LLC, the 24 * University of California, Berkeley, and its contributors. 25 * 4. Neither the name of the University nor the names of its contributors 26 * may be used to endorse or promote products derived from this software 27 * without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY SOFTWEYR LLC, THE REGENTS AND CONTRIBUTORS 30 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 31 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 32 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SOFTWEYR LLC, THE 33 * REGENTS, OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 34 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 35 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 36 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 37 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 38 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 39 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 40 * 41 * Original version ID: 42 * FreeBSD: src/lib/libc/string/wcstok.c,v 1.1 2002/09/07 08:16:57 tjr Exp 43 */ 44 45 #include <wchar.h> 46 47 wchar_t * 48 wcstok(wchar_t * __restrict s, const wchar_t * __restrict delim, 49 wchar_t ** __restrict last) 50 { 51 const wchar_t *spanp; 52 wchar_t c, sc; 53 wchar_t *tok; 54 55 if (s == NULL && (s = *last) == NULL) 56 return (NULL); 57 58 /* 59 * Skip (span) leading delimiters (s += wcsspn(s, delim), sort of). 60 */ 61 cont: 62 c = *s++; 63 for (spanp = delim; (sc = *spanp++) != L'\0';) { 64 if (c == sc) 65 goto cont; 66 } 67 68 if (c == L'\0') { /* no non-delimiter characters */ 69 *last = NULL; 70 return (NULL); 71 } 72 tok = s - 1; 73 74 /* 75 * Scan token (scan for delimiters: s += wcscspn(s, delim), sort of). 76 * Note that delim must have one NUL; we stop if we see that, too. 77 */ 78 for (;;) { 79 c = *s++; 80 spanp = delim; 81 do { 82 if ((sc = *spanp++) == c) { 83 if (c == L'\0') 84 s = NULL; 85 else 86 s[-1] = L'\0'; 87 *last = s; 88 return (tok); 89 } 90 } while (sc != L'\0'); 91 } 92 /* NOTREACHED */ 93 } 94