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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_RAND_UTIL_H_
#define BASE_RAND_UTIL_H_
#pragma once
#include <string>
#include "base/base_api.h"
#include "base/basictypes.h"
namespace base {
// Returns a random number in range [0, kuint64max]. Thread-safe.
BASE_API uint64 RandUint64();
// Returns a random number between min and max (inclusive). Thread-safe.
BASE_API int RandInt(int min, int max);
// Returns a random number in range [0, max). Thread-safe.
//
// Note that this can be used as an adapter for std::random_shuffle():
// Given a pre-populated |std::vector<int> myvector|, shuffle it as
// std::random_shuffle(myvector.begin(), myvector.end(), base::RandGenerator);
BASE_API uint64 RandGenerator(uint64 max);
// Returns a random double in range [0, 1). Thread-safe.
BASE_API double RandDouble();
// Given input |bits|, convert with maximum precision to a double in
// the range [0, 1). Thread-safe.
BASE_API double BitsToOpenEndedUnitInterval(uint64 bits);
// Returns a random string of the specified length.
BASE_API std::string RandBytesAsString(size_t length);
} // namespace base
#endif // BASE_RAND_UTIL_H_
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