OW_RandomNumber.hpp

Go to the documentation of this file.

/*******************************************************************************
* Copyright (C) 2001-2004 Vintela, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* 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.
*
*  - 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.
*
*  - 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''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL Vintela, Inc. OR THE CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************/

#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

---