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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef COMMON_RANDOM_H
#define COMMON_RANDOM_H
#include "common/scummsys.h"
namespace Common {
class String;
/**
* Simple random number generator. Although it is definitely not suitable for
* cryptographic purposes, it serves our purposes just fine.
*/
class RandomSource {
private:
uint32 _randSeed;
public:
/**
* Construct a new randomness source with the specific name.
* The name used name must be globally unique, and is used to
* register the randomness source with the active event recorder,
* if any.
*/
RandomSource(const String &name);
void setSeed(uint32 seed);
uint32 getSeed() const {
return _randSeed;
}
/**
* Generates a random unsigned integer in the interval [0, max].
* @param max the upper bound
* @return a random number in the interval [0, max]
*/
uint getRandomNumber(uint max);
/**
* Generates a random bit, i.e. either 0 or 1.
* Identical to getRandomNumber(1), but potentially faster.
* @return a random bit, either 0 or 1
*/
uint getRandomBit();
/**
* Generates a random unsigned integer in the interval [min, max].
* @param min the lower bound
* @param max the upper bound
* @return a random number in the interval [min, max]
*/
uint getRandomNumberRng(uint min, uint max);
};
} // End of namespace Common
#endif
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