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/*!A cross-platform build utility based on Lua
*
* 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) 2015-present, Xmake Open Source Community.
*
* @author luadebug, ruki
* @file lower.c
*
*/
/* //////////////////////////////////////////////////////////////////////////////////////
* includes
*/
#include "prefix.h"
/* //////////////////////////////////////////////////////////////////////////////////////
* implementation
*/
/* string.lower
*
* @param str the string
*
* @code
* local result = string.lower(str)
* @endcode
*/
tb_int_t xm_string_lower(lua_State *lua) {
// check
tb_assert_and_check_return_val(lua, 0);
// get string
size_t size = 0;
tb_char_t const* cstr = luaL_checklstring(lua, 1, &size);
tb_check_return_val(cstr, 0);
// empty?
if (!size) {
lua_pushstring(lua, "");
return 1;
}
// copy string to buffer
tb_char_t* buffer = (tb_char_t*)tb_malloc_bytes(size + 1);
if (buffer) {
tb_memcpy(buffer, cstr, size);
buffer[size] = '\0';
// to lower
tb_long_t real_size = tb_charset_utf8_tolower(buffer, size);
// push result
if (real_size >= 0) {
lua_pushlstring(lua, buffer, real_size);
} else {
lua_pushlstring(lua, cstr, size);
}
tb_free(buffer);
} else {
lua_pushnil(lua);
}
return 1;
}
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