mirror of
https://github.com/KingDuckZ/kamokan.git
synced 2025-08-07 12:59:45 +00:00
48 lines
1.5 KiB
C++
48 lines
1.5 KiB
C++
/* Copyright 2017, Michele Santullo
|
|
* This file is part of "tawashi".
|
|
*
|
|
* "tawashi" is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* "tawashi" is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with "tawashi". If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "get_env.hpp"
|
|
#include "duckhandy/lexical_cast.hpp"
|
|
#include "sanitized_utf8.hpp"
|
|
#include <cstdlib>
|
|
|
|
namespace tawashi {
|
|
boost::optional<std::string> get_env (const char* parName) {
|
|
using boost::string_ref;
|
|
using boost::make_optional;
|
|
using boost::optional;
|
|
|
|
const char* const raw_getvar = secure_getenv(parName);
|
|
if (raw_getvar)
|
|
return sanitized_utf8(boost::string_ref(raw_getvar));
|
|
else
|
|
return optional<std::string>();
|
|
}
|
|
|
|
template <>
|
|
std::string get_env_as (const char* parName, const std::string& parDefault) {
|
|
auto var = get_env(parName);
|
|
return (var ? *var : parDefault);
|
|
}
|
|
|
|
template <>
|
|
std::size_t get_env_as (const char* parName, const std::size_t& parDefault) {
|
|
using dhandy::lexical_cast;
|
|
auto var = get_env(parName);
|
|
return (var ? lexical_cast<std::size_t>(*var) : parDefault);
|
|
}
|
|
} //namespace tawashi
|