/*******************************************************************************
* Copyright (C) 2001-2004 Vintela, Inc. All rights reserved.
*
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* modification, are permitted provided that the following conditions are met:
*
*  - Redistributions of source code must retain the above copyright notice,
*    this list of conditions and the following disclaimer.
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*  - Redistributions in binary form must reproduce the above copyright notice,
*    this list of conditions and the following disclaimer in the documentation
*    and/or other materials provided with the distribution.
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*  - Neither the name of Vintela, Inc. nor the names of its
*    contributors may be used to endorse or promote products derived from this
*    software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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*******************************************************************************/

/**
 * @author Bart Whiteley
 * @author Dan Nuffer
 */

#ifndef OW_RANDOMNUMBER_HPP_INCLUDE_GUARD_
#define OW_RANDOMNUMBER_HPP_INCLUDE_GUARD_
#include "OW_config.h"
#include "OW_Types.hpp"
#include <stdlib.h> // for RAND_MAX

namespace OW_NAMESPACE
{

class OW_COMMON_API RandomNumber
{
public:
	// Precondition: lowVal < highVal
	RandomNumber(Int32 lowVal = 0, Int32 highVal = RAND_MAX);
	Int32 getNextNumber();
	
public:
	// This function can be called to control when the prng will be initialized.
	// If it hasn't been previously called, it will be called the first time a RandomNumber instance is instantiated.
	static void initRandomness();
	static void saveRandomState();

private:
	Int32 m_lowVal;
	Int32 m_highVal;
};

} // end namespace OW_NAMESPACE

#endif
