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/*
* Copyright (c) 2018 Samsung Electronics Co., Ltd. All Rights Reserved
*
* 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.
*/
/**
* @file EnvVar.h
* @ingroup COM_AI_RUNTIME
* @brief This file contains nnfw::misc::EnvVar class
*/
#ifndef __NNFW_MISC_ENV_VAR__
#define __NNFW_MISC_ENV_VAR__
#include <algorithm>
#include <array>
#include <cstdlib>
#include <string>
namespace nnfw
{
namespace misc
{
/**
* @brief Class to access environment variable
*/
class EnvVar
{
public:
/**
* @brief Construct a new EnvVar object
* @param[in] key environment variable
*/
EnvVar(const std::string &key)
{
const char *value = std::getenv(key.c_str());
if (value == nullptr)
{
// An empty string is considered as an empty value
_value = "";
}
else
{
_value = value;
}
}
/**
* @brief Get environment variable of string type
* @param[in] def Default value of environment variable
* @return Defaut value passed as a parameter when there is no environment variable,
* otherwise the value of environment variable passed into constructor
*/
std::string asString(const std::string &def) const
{
if (_value.empty())
return def;
return _value;
}
/**
* @brief Get environment variable of boolean type
* @param[in] def Default value of environment variable
* @return Defaut value passed as a parameter when there is no environment variable,
* otherwise the value of environment variable passed into constructor
*/
bool asBool(bool def) const
{
if (_value.empty())
return def;
static const std::array<std::string, 5> false_list{"0", "OFF", "FALSE", "N", "NO"};
auto false_found = std::find(false_list.begin(), false_list.end(), _value);
return (false_found == false_list.end());
}
/**
* @brief Get environment variable of int type
* @param[in] def Default value of environment variable
* @return Defaut value passed as a parameter when there is no environment variable,
* otherwise the value of environment variable passed into constructor
*/
int asInt(int def) const
{
if (_value.empty())
return def;
return std::stoi(_value);
}
/**
* @brief Get environment variable of float type
* @param[in] def Default value of environment variable
* @return Defaut value passed as a parameter when there is no environment variable,
* otherwise the value of environment variable passed into constructor
*/
float asFloat(float def) const
{
if (_value.empty())
return def;
return std::stof(_value);
}
private:
std::string _value;
};
} // namespace misc
} // namespace nnfw
#endif // __NNFW_MISC_ENV_VAR__
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