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