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