random.h

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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2016 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
#ifndef BITCOIN_RANDOM_H
#define BITCOIN_RANDOM_H
 
#include "uint256.h"
 
#include <stdint.h>
 
/* Seed OpenSSL PRNG with additional entropy data */
void RandAddSeed();
 
void GetRandBytes(unsigned char* buf, int num);
uint64_t GetRand(uint64_t nMax);
int GetRandInt(int nMax);
uint256 GetRandHash();
 
void GetStrongRandBytes(unsigned char* buf, int num);
 
class FastRandomContext {
public:
    explicit FastRandomContext(bool fDeterministic=false);
 
    uint32_t rand32() {
        Rz = 36969 * (Rz & 65535) + (Rz >> 16);
        Rw = 18000 * (Rw & 65535) + (Rw >> 16);
        return (Rw << 16) + Rz;
    }
 
    uint32_t Rz;
    uint32_t Rw;
};
 
#endif // BITCOIN_RANDOM_H