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dff8da6b | 1 | /* Copyright (C) 1995-2024 Free Software Foundation, Inc. |
33a934a3 | 2 | This file is part of the GNU C Library. |
a482b5a5 | 3 | |
33a934a3 | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
a482b5a5 | 8 | |
33a934a3 UD |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
a482b5a5 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
a482b5a5 | 17 | |
299a95b9 | 18 | #include <wchar.h> |
a482b5a5 RM |
19 | #include <errno.h> |
20 | ||
21 | ||
299a95b9 RM |
22 | /* Parse WCS into tokens separated by characters in DELIM. If WCS is |
23 | NULL, the last string wcstok() was called with is used. */ | |
a482b5a5 | 24 | wchar_t * |
9d46370c | 25 | wcstok (wchar_t *wcs, const wchar_t *delim, wchar_t **save_ptr) |
a482b5a5 | 26 | { |
299a95b9 | 27 | wchar_t *result; |
a482b5a5 RM |
28 | |
29 | if (wcs == NULL) | |
6e4c40ba UD |
30 | { |
31 | if (*save_ptr == NULL) | |
32 | { | |
33 | __set_errno (EINVAL); | |
34 | return NULL; | |
35 | } | |
36 | else | |
37 | wcs = *save_ptr; | |
38 | } | |
a482b5a5 RM |
39 | |
40 | /* Scan leading delimiters. */ | |
41 | wcs += wcsspn (wcs, delim); | |
42 | if (*wcs == L'\0') | |
43 | { | |
59dd8641 | 44 | *save_ptr = NULL; |
a482b5a5 RM |
45 | return NULL; |
46 | } | |
47 | ||
48 | /* Find the end of the token. */ | |
299a95b9 RM |
49 | result = wcs; |
50 | wcs = wcspbrk (result, delim); | |
a482b5a5 RM |
51 | if (wcs == NULL) |
52 | /* This token finishes the string. */ | |
59dd8641 | 53 | *save_ptr = NULL; |
a482b5a5 RM |
54 | else |
55 | { | |
59dd8641 | 56 | /* Terminate the token and make *SAVE_PTR point past it. */ |
a482b5a5 | 57 | *wcs = L'\0'; |
59dd8641 | 58 | *save_ptr = wcs + 1; |
a482b5a5 | 59 | } |
299a95b9 | 60 | return result; |
a482b5a5 | 61 | } |