/*
   Copyright (c)  2014 IOnU Security Inc. All rights reserved
   Created February 2014 by Kendrick Webster
 
   Random.cpp - implementation for Random.h
*/
#include "Hash.hpp"
#include "Random.h"
#include <stdio.h>
#include <chrono>

namespace
{
    ionu::hash::CHash rng_hash;
    std::chrono::steady_clock::time_point rng_seed;
}

void ionu::random::GetRandom(void* p, size_t n)
{
    rng_hash.GetAndMix(p, n);
}

void ionu::random::SeedRandom(void)
{
    rng_seed = std::chrono::steady_clock::now();
    rng_hash.Hash(&rng_seed, sizeof(rng_seed));
}

std::string ionu::random::GetLastSeedAsString(void)
{
    char s[17];
    snprintf(s, sizeof(s), "%.16lX", *reinterpret_cast<uint64_t*>(&rng_seed));
    return s;
}

std::string ionu::random::GetRandomString(size_t n)
{
    return rng_hash.GetStringAndMix(n);
}