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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 getenv.c
*
*/
/* //////////////////////////////////////////////////////////////////////////////////////
* trace
*/
#define TB_TRACE_MODULE_NAME "getenv"
#define TB_TRACE_MODULE_DEBUG (0)
/* //////////////////////////////////////////////////////////////////////////////////////
* includes
*/
#include "prefix.h"
/* //////////////////////////////////////////////////////////////////////////////////////
* macros
*/
// the separator
#if defined(TB_CONFIG_OS_WINDOWS) && !defined(TB_COMPILER_LIKE_UNIX)
#define XM_OS_ENV_SEP ';'
#else
#define XM_OS_ENV_SEP ':'
#endif
/* //////////////////////////////////////////////////////////////////////////////////////
* implementation
*/
tb_int_t xm_os_getenv(lua_State *lua) {
tb_assert_and_check_return_val(lua, 0);
// get the name
tb_char_t const *name = luaL_checkstring(lua, 1);
tb_check_return_val(name, 0);
// init values
tb_string_t values;
if (!tb_string_init(&values)) {
return 0;
}
// init environment
tb_environment_ref_t environment = tb_environment_init();
if (environment) {
// load variable
if (tb_environment_load(environment, name)) {
// make values
tb_bool_t is_first = tb_true;
tb_for_all_if(tb_char_t const *, value, environment, value) {
// append separator
if (!is_first) {
tb_string_chrcat(&values, XM_OS_ENV_SEP);
} else {
is_first = tb_false;
}
// append value
tb_string_cstrcat(&values, value);
}
}
// exit environment
tb_environment_exit(environment);
}
// save result
if (tb_string_size(&values)) {
lua_pushstring(lua, tb_string_cstr(&values));
} else {
lua_pushnil(lua);
}
// exit values
tb_string_exit(&values);
return 1;
}
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