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// **********************************************************************
//
// Copyright (c) 2003-2018 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
#ifndef ICE_UTIL_RANDOM_H
#define ICE_UTIL_RANDOM_H
#include <IceUtil/Config.h>
#include <IceUtil/Exception.h>
#ifdef ICE_CPP11_COMPILER
# include <algorithm>
# include <random>
#else
# include <functional>
#endif
namespace IceUtilInternal
{
ICE_API void generateRandom(char*, size_t);
ICE_API unsigned int random(int = 0);
#ifdef ICE_CPP11_COMPILER
template<class T>
void shuffle(T first, T last)
{
std::random_device rd;
std::mt19937 rng(rd());
std::shuffle(first, last, rng);
}
#else
struct RandomNumberGenerator : public std::unary_function<std::ptrdiff_t, std::ptrdiff_t>
{
std::ptrdiff_t operator()(std::ptrdiff_t d)
{
return IceUtilInternal::random(static_cast<int>(d));
}
};
template<class T>
void shuffle(T first, T last)
{
RandomNumberGenerator rng;
random_shuffle(first, last, rng);
}
#endif
}
#endif
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