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/*
* Copyright (C) 2021 Open Source Robotics Foundation
*
* 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.
*
*/
// Note: this is a direct copy from ignition::common,
// and can be removed when sdformat has common as a dependency
#ifndef SDF_TEST_ENV_HH
#define SDF_TEST_ENV_HH
#include <cstdlib>
#include <string>
#ifdef _WIN32
#include <windows.h>
#endif
namespace sdf
{
namespace testing
{
/// \brief Find the environment variable '_name' and return its value.
///
/// Note: the intention is to put this in ign-util, and remove it
/// from sdformat once the depcnency is in place
///
/// \param[in] _name Name of the environment variable.
/// \param[out] _value Value if the variable was found.
/// \param[in] _allowEmpty Allow set-but-empty variables.
/// (Unsupported on Windows)
/// \return True if the variable was found or false otherwise.
bool env(const std::string &_name,
std::string &_value,
bool _allowEmpty)
{
std::string v;
bool valid = false;
#ifdef _WIN32
// Unused on Windows, suppress warning
(void) _allowEmpty;
const DWORD buffSize = 32767;
static char buffer[buffSize];
if (GetEnvironmentVariable(_name.c_str(), buffer, buffSize))
{
v = buffer;
}
if (!v.empty())
{
valid = true;
}
#else
const char *cvar = std::getenv(_name.c_str());
if (cvar != nullptr)
{
v = cvar;
valid = true;
if (v[0] == '\0' && !_allowEmpty)
{
valid = false;
}
}
#endif
if (valid)
{
_value = v;
return true;
}
return false;
}
bool env(const std::string &_name, std::string &_value)
{
return env(_name, _value, false);
}
/// \brief Set the environment variable '_name'.
///
/// Note that on Windows setting an empty string (_value=="")
/// is the equivalent of unsetting the variable.
///
/// \param[in] _name Name of the environment variable.
/// \param[in] _value Value of the variable to be set.
/// \return True if the variable was set or false otherwise.
bool setenv(const std::string &_name,
const std::string &_value)
{
#ifdef _WIN32
if (0 != _putenv_s(_name.c_str(), _value.c_str()))
{
return false;
}
#else
if (0 != ::setenv(_name.c_str(), _value.c_str(), true))
{
return false;
}
#endif
return true;
}
/// \brief Unset the environment variable '_name'.
/// \param[in] _name Name of the environment variable.
/// \return True if the variable was unset or false otherwise.
bool unsetenv(const std::string &_name)
{
#ifdef _WIN32
if (0 != _putenv_s(_name.c_str(), ""))
{
return false;
}
#else
if (0 != ::unsetenv(_name.c_str()))
{
return false;
}
#endif
return true;
}
} // namespace testing
} // namespace sdf
#endif
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