/** * slibc — Yet another C library * Copyright © 2015 Mattias Andrée (maandree@member.fsf.org) * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include <wchar.h> /** * Check whether a string starts with a specific string. * This check is case sensitive. * * This is a slibc extension. * * @param string The string to inspect. * @param desired The desired beginning of the string. * @return `string` if `string` begins with * `desired`, `NULL` otherwise. * * @since Always. */ wchar_t* (wcsstarts)(const wchar_t* string, const wchar_t* desired) { size_t n = wcslen(string); size_t m = wcslen(desired); if (n < m) return NULL; return wmemcmp(string, desired, m) ? NULL : string; }