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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 ruki
* @file width.c
*
*/
/* //////////////////////////////////////////////////////////////////////////////////////
* includes
*/
#include "utf8.h"
/* //////////////////////////////////////////////////////////////////////////////////////
* interfaces
*/
/* utf8.width(char)
* utf8.width(str)
* utf8.width(codepoint)
*/
tb_int_t xm_utf8_width(lua_State* lua) {
/* we must not use lua_isnumber() here: it also accepts a numeric string,
* so utf8.width("9") would return the width of the code point 9 (a tab)
* instead of the width of the string "9"
*/
if (lua_type(lua, 1) == LUA_TNUMBER) {
xm_utf8_int_t val = (xm_utf8_int_t)lua_tointeger(lua, 1);
lua_pushinteger(lua, xm_utf8_charwidth(val));
} else {
size_t len = 0;
tb_char_t const* s = luaL_checklstring(lua, 1, &len);
lua_pushinteger(lua, xm_utf8_strwidth(s, len));
}
return 1;
}
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