RandomNumber.hpp

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00001 /*******************************************************************************
00002 * Copyright (C) 2004 Vintela, Inc. All rights reserved.
00003 * Copyright (C) 2005 Novell, Inc. All rights reserved.
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00005 * Redistribution and use in source and binary forms, with or without
00006 * modification, are permitted provided that the following conditions are met:
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00008 *  - Redistributions of source code must retain the above copyright notice,
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00012 *    this list of conditions and the following disclaimer in the documentation
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00031 
00032 
00038 #ifndef BLOCXX_RANDOMNUMBER_HPP_INCLUDE_GUARD_
00039 #define BLOCXX_RANDOMNUMBER_HPP_INCLUDE_GUARD_
00040 #include "blocxx/BLOCXX_config.h"
00041 #include "blocxx/Types.hpp"
00042 #include <stdlib.h> // for RAND_MAX
00043 
00044 namespace BLOCXX_NAMESPACE
00045 {
00046 
00047 class BLOCXX_COMMON_API RandomNumber
00048 {
00049 public:
00050    // Precondition: lowVal < highVal
00051    RandomNumber(Int32 lowVal = 0, Int32 highVal = RAND_MAX);
00052    Int32 getNextNumber();
00053 public:
00054    // This function can be called to control when the prng will be initialized.
00055    // If it hasn't been previously called, it will be called the first time a RandomNumber instance is instantiated.
00056    static void initRandomness();
00057    static void saveRandomState();
00058    
00059 private:
00060    Int32 m_lowVal;
00061    Int32 m_highVal;
00062 };
00063 
00064 } // end namespace BLOCXX_NAMESPACE
00065 
00066 #endif

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