/*
 * (c) Copyright Ascensio System SIA 2010-2019
 *
 * This program is a free software product. You can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License (AGPL)
 * version 3 as published by the Free Software Foundation. In accordance with
 * Section 7(a) of the GNU AGPL its Section 15 shall be amended to the effect
 * that Ascensio System SIA expressly excludes the warranty of non-infringement
 * of any third-party rights.
 *
 * This program is distributed WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE. For
 * details, see the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
 *
 * You can contact Ascensio System SIA at 20A-12 Ernesta Birznieka-Upisha
 * street, Riga, Latvia, EU, LV-1050.
 *
 * The  interactive user interfaces in modified source and object code versions
 * of the Program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU AGPL version 3.
 *
 * Pursuant to Section 7(b) of the License you must retain the original Product
 * logo when distributing the program. Pursuant to Section 7(e) we decline to
 * grant you any rights under trademark law for use of our trademarks.
 *
 * All the Product's GUI elements, including illustrations and icon sets, as
 * well as technical writing content are licensed under the terms of the
 * Creative Commons Attribution-ShareAlike 4.0 International. See the License
 * terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
 *
 */
#include <stdlib.h>
#include "SystemUtils.h"
#include "File.h"

namespace NSSystemUtils
{
	std::wstring GetEnvVariable(const std::wstring& strName)
	{
#if defined(_WIN32) || defined(_WIN32_WCE) || defined(_WIN64)
		wchar_t* pVal = _wgetenv(strName.c_str());
		if (NULL != pVal)
		{
			std::wstring sRes(pVal);
			return sRes;
		}
		else
		{
			return L"";
		}
#else
		std::string strNameA = NSFile::CUtf8Converter::GetUtf8StringFromUnicode(strName);
		char* pValA = getenv(strNameA.c_str());
		if (NULL != pValA)
		{
			return NSFile::CUtf8Converter::GetUnicodeStringFromUTF8((BYTE*)pValA, strlen(pValA));
		}
		else
		{
			return L"";
		}
#endif
	}
}