/*!The Treasure Box Library
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Copyright (C) 2009-present, TBOOX Open Source Group.
 *
 * @author      ruki
 * @file        wcsicmp.c
 * @ingroup     libc
 *
 */

/* //////////////////////////////////////////////////////////////////////////////////////
 * includes
 */
#include "string.h"
#ifdef TB_CONFIG_LIBC_HAVE_WCSCASECMP
#   include <wchar.h>
#endif

/* //////////////////////////////////////////////////////////////////////////////////////
 * interfaces
 */
#ifdef TB_CONFIG_LIBC_HAVE_WCSCASECMP
tb_long_t tb_wcsicmp(tb_wchar_t const* s1, tb_wchar_t const* s2)
{
    // check
    tb_assert_and_check_return_val(s1 && s2, 0);
#   ifdef TB_COMPILER_IS_MSVC
    return _wcsicmp(s1, s2);
#   else
    return wcscasecmp(s1, s2);
#   endif
}
#else
tb_long_t tb_wcsicmp(tb_wchar_t const* s1, tb_wchar_t const* s2)
{
    // check
    tb_assert_and_check_return_val(s1 && s2, 0);
    tb_check_return_val(s1 != s2, 0);

    // done
    while ((*s1 == *s2) || (tb_tolower(*s1) == tb_tolower(*s2)))
    {
        if (!*s1++) return 0;
        ++s2;
    }
    return (((tb_wchar_t)tb_tolower(*s1)) < ((tb_wchar_t)tb_tolower(*s2))) ? -1 : 1;
}
#endif
