environment.h

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/** @file
 *  @author Bram de Greve (bramz@users.sourceforge.net)
 *  @author Tom De Muer (tomdemuer@users.sourceforge.net)
 *
 *  *** BEGIN LICENSE INFORMATION ***
 *  
 *  The contents of this file are subject to the Common Public Attribution License 
 *  Version 1.0 (the "License"); you may not use this file except in compliance with 
 *  the License. You may obtain a copy of the License at 
 *  http://lass.sourceforge.net/cpal-license. The License is based on the 
 *  Mozilla Public License Version 1.1 but Sections 14 and 15 have been added to cover 
 *  use of software over a computer network and provide for limited attribution for 
 *  the Original Developer. In addition, Exhibit A has been modified to be consistent 
 *  with Exhibit B.
 *  
 *  Software distributed under the License is distributed on an "AS IS" basis, WITHOUT 
 *  WARRANTY OF ANY KIND, either express or implied. See the License for the specific 
 *  language governing rights and limitations under the License.
 *  
 *  The Original Code is LASS - Library of Assembled Shared Sources.
 *  
 *  The Initial Developer of the Original Code is Bram de Greve and Tom De Muer.
 *  The Original Developer is the Initial Developer.
 *  
 *  All portions of the code written by the Initial Developer are:
 *  Copyright (C) 2004-2007 the Initial Developer.
 *  All Rights Reserved.
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 *
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 *  GNU General Public License Version 2 or later (the GPL), in which case the 
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 *  deleting the provisions above and replace them with the notice and other 
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 *  *** END LICENSE INFORMATION ***
 */


#ifndef LASS_GUARDIAN_OF_INCLUSION_UTIL_IMPL_ENVIRONMENT_H
#define LASS_GUARDIAN_OF_INCLUSION_UTIL_IMPL_ENVIRONMENT_H

#include "util_common.h"

namespace lass
{
namespace util
{
namespace impl
{

LASS_DLL const std::string LASS_CALL lass_getenv(const std::string& iName);
LASS_DLL void LASS_CALL lass_putenv(const std::string& iName, const std::string& iValue);

template <typename T>
struct Environment
{
    static const T get(const std::string& iName)
    {
        return stringCast<T>(lass_getenv(iName));
    }
    static void put(const std::string& iName, typename CallTraits<T>::TParam iValue)
    {
        lass_putenv(iName, stringCast<std::string>(iValue));
    }
};

template <>
struct Environment<std::string>
{
    static const std::string get(const std::string& iName)
    {
        return lass_getenv(iName);
    }
    static void put(const std::string& iName, const std::string& iValue)
    {
        lass_putenv(iName, iValue);
    }
};

}

template <typename T>
const T getEnvironment(const std::string& iName)
{   
    return impl::Environment<typename CallTraits<T>::TValue>::get(iName);
}

template <typename T>
void putEnvironment(const std::string& iName, const T& iValue)
{
    impl::Environment<typename CallTraits<T>::TValue>::put(iName, iValue);
}

}
}

#endif

// EOF