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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 byteof.c
*
*/
/* //////////////////////////////////////////////////////////////////////////////////////
* trace
*/
#define TB_TRACE_MODULE_NAME "byteof"
#define TB_TRACE_MODULE_DEBUG (0)
/* //////////////////////////////////////////////////////////////////////////////////////
* includes
*/
#include "prefix.h"
/* //////////////////////////////////////////////////////////////////////////////////////
* implementation
*/
tb_int_t xm_libc_byteof(lua_State* lua)
{
// check
tb_assert_and_check_return_val(lua, 0);
// get data
tb_pointer_t data = tb_null;
if (lua_isnumber(lua, 1))
data = (tb_pointer_t)(tb_size_t)lua_tointeger(lua, 1);
else if (lua_isstring(lua, 1))
data = (tb_pointer_t)luaL_checkstring(lua, 1);
else xm_libc_return_error(lua, "libc.byteof(invalid data)!");
// get offset
tb_int_t offset = 0;
if (lua_isnumber(lua, 2))
offset = (tb_int_t)lua_tointeger(lua, 2);
else xm_libc_return_error(lua, "libc.byteof(invalid offset)!");
lua_pushinteger(lua, ((tb_byte_t const*)data)[offset]);
return 1;
}
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