mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-17 23:27:37 +00:00
81 lines
2.2 KiB
C++
81 lines
2.2 KiB
C++
/* 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
|