| | 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@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 | * 4. 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: src/lib/libc/string/wcstok.c,v 1.3 2007/12/12 18:33:06 wes Exp $"); |
| | 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 | } |
projects / apple / libc.git / blame_incremental