projects / apple / libc.git / blame
| Commit | Line | Data |
|---|---|---|
| 224c7076 A |
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 | * 3. All advertising materials mentioning features or use of this software | |
| 19 | * must display the following acknowledgement: | |
| 20 | * This product includes software developed by Softweyr LLC, the | |
| 21 | * University of California, Berkeley, and its contributors. | |
| 22 | * 4. Neither the name of the University nor the names of its contributors | |
| 23 | * may be used to endorse or promote products derived from this software | |
| 24 | * without specific prior written permission. | |
| 25 | * | |
| 26 | * THIS SOFTWARE IS PROVIDED BY SOFTWEYR LLC, THE REGENTS AND CONTRIBUTORS | |
| 27 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 28 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A | |
| 29 | * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SOFTWEYR LLC, THE | |
| 30 | * REGENTS, OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 31 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED | |
| 32 | * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 33 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
| 34 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
| 35 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
| 36 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 37 | */ | |
| 38 | ||
| 39 | #include <sys/cdefs.h> | |
| 40 | __FBSDID("$FreeBSD: src/lib/libc/string/wcstok.c,v 1.2 2003/03/12 06:41:49 tjr Exp $"); | |
| 41 | ||
| 42 | #include <wchar.h> | |
| 43 | ||
| 44 | wchar_t * | |
| 45 | wcstok(wchar_t * __restrict s, const wchar_t * __restrict delim, | |
| 46 | wchar_t ** __restrict last) | |
| 47 | { | |
| 48 | const wchar_t *spanp; | |
| 49 | wchar_t *tok; | |
| 50 | wchar_t c, sc; | |
| 51 | ||
| 52 | if (s == NULL && (s = *last) == NULL) | |
| 53 | return (NULL); | |
| 54 | ||
| 55 | /* | |
| 56 | * Skip (span) leading delimiters (s += wcsspn(s, delim), sort of). | |
| 57 | */ | |
| 58 | cont: | |
| 59 | c = *s++; | |
| 60 | for (spanp = delim; (sc = *spanp++) != L'\0';) { | |
| 61 | if (c == sc) | |
| 62 | goto cont; | |
| 63 | } | |
| 64 | ||
| 65 | if (c == L'\0') { /* no non-delimiter characters */ | |
| 66 | *last = NULL; | |
| 67 | return (NULL); | |
| 68 | } | |
| 69 | tok = s - 1; | |
| 70 | ||
| 71 | /* | |
| 72 | * Scan token (scan for delimiters: s += wcscspn(s, delim), sort of). | |
| 73 | * Note that delim must have one NUL; we stop if we see that, too. | |
| 74 | */ | |
| 75 | for (;;) { | |
| 76 | c = *s++; | |
| 77 | spanp = delim; | |
| 78 | do { | |
| 79 | if ((sc = *spanp++) == c) { | |
| 80 | if (c == L'\0') | |
| 81 | s = NULL; | |
| 82 | else | |
| 83 | s[-1] = L'\0'; | |
| 84 | *last = s; | |
| 85 | return (tok); | |
| 86 | } | |
| 87 | } while (sc != L'\0'); | |
| 88 | } | |
| 89 | /* NOTREACHED */ | |
| 90 | } |