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/**
* 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 insensitive.
*
* 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.
*/
wchar_t* (wcscasestarts)(const wchar_t* string, const wchar_t* desired)
{
size_t n = wcslen(string);
size_t m = wcslen(desired);
if (n < m)
return NULL;
return wmemcasecmp(string, desired, m) ? NULL : string;
}
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