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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>
/**
* Compare two strings alphabetically in a case sensitive manner.
*
* This is a GNU-compliant slibc extension.
*
* @param a A negative value is returned if this is the lesser.
* @param b A positive value is returned if this is the lesser.
* @param length The maximum number of characters to compare.
* @return Zero is returned if `a` and `b` are equal, otherwise,
* see the specifications for `a` and `b`.
*/
int wcsncmp(const wchar_t* a, const wchar_t* b, size_t length)
{
size_t n = wcsnlen(a, length);
size_t m = wcsnlen(b, length);
int r = wmemcmp(a, b, (n < m ? n : m));
return r ? r : n == m ? 0 : n < m ? -1 : +1;
}
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