xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 1995-2016 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include <wchar.h> |
| 20 | #include <errno.h> |
| 21 | |
| 22 | |
| 23 | /* Parse WCS into tokens separated by characters in DELIM. If WCS is |
| 24 | NULL, the last string wcstok() was called with is used. */ |
| 25 | wchar_t * |
| 26 | wcstok (wchar_t *wcs, const wchar_t *delim, wchar_t **save_ptr) |
| 27 | { |
| 28 | wchar_t *result; |
| 29 | |
| 30 | if (wcs == NULL) |
| 31 | { |
| 32 | if (*save_ptr == NULL) |
| 33 | { |
| 34 | __set_errno (EINVAL); |
| 35 | return NULL; |
| 36 | } |
| 37 | else |
| 38 | wcs = *save_ptr; |
| 39 | } |
| 40 | |
| 41 | /* Scan leading delimiters. */ |
| 42 | wcs += wcsspn (wcs, delim); |
| 43 | if (*wcs == L'\0') |
| 44 | { |
| 45 | *save_ptr = NULL; |
| 46 | return NULL; |
| 47 | } |
| 48 | |
| 49 | /* Find the end of the token. */ |
| 50 | result = wcs; |
| 51 | wcs = wcspbrk (result, delim); |
| 52 | if (wcs == NULL) |
| 53 | /* This token finishes the string. */ |
| 54 | *save_ptr = NULL; |
| 55 | else |
| 56 | { |
| 57 | /* Terminate the token and make *SAVE_PTR point past it. */ |
| 58 | *wcs = L'\0'; |
| 59 | *save_ptr = wcs + 1; |
| 60 | } |
| 61 | return result; |
| 62 | } |