| /* Copyright (C) 1998-2016 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <wchar.h> |
| |
| #ifdef WCSNLEN |
| # define __wcsnlen WCSNLEN |
| #endif |
| |
| /* Return length of string S at most maxlen. */ |
| size_t |
| __wcsnlen (const wchar_t *s, size_t maxlen) |
| { |
| size_t len = 0; |
| |
| while (maxlen > 0 && s[len] != L'\0') |
| { |
| ++len; |
| if (--maxlen == 0 || s[len] == L'\0') |
| return len; |
| ++len; |
| if (--maxlen == 0 || s[len] == L'\0') |
| return len; |
| ++len; |
| if (--maxlen == 0 || s[len] == L'\0') |
| return len; |
| ++len; |
| --maxlen; |
| } |
| |
| return len; |
| } |
| #ifndef WCSNLEN |
| weak_alias (__wcsnlen, wcsnlen) |
| #endif |