mirror of https://github.com/minetest/irrlicht.git
132 lines
3.2 KiB
C++
132 lines
3.2 KiB
C++
// Copyright (C) 2002-2012 Nikolaus Gebhardt
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// This file is part of the "Irrlicht Engine".
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// For conditions of distribution and use, see copyright notice in irrlicht.h
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#ifndef __IRR_OS_H_INCLUDED__
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#define __IRR_OS_H_INCLUDED__
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#include "IrrCompileConfig.h" // for endian check
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#include "irrTypes.h"
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#include "irrString.h"
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#include "path.h"
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#include "ILogger.h"
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#include "ITimer.h"
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namespace irr
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{
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namespace os
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{
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class Byteswap
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{
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public:
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static u16 byteswap(u16 num);
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static s16 byteswap(s16 num);
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static u32 byteswap(u32 num);
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static s32 byteswap(s32 num);
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static u64 byteswap(u64 num);
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static s64 byteswap(s64 num);
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static f32 byteswap(f32 num);
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// prevent accidental swapping of chars
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static u8 byteswap(u8 num);
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static c8 byteswap(c8 num);
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};
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class Printer
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{
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public:
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// prints out a string to the console out stdout or debug log or whatever
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static void print(const c8* message, ELOG_LEVEL ll = ELL_INFORMATION);
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static void log(const c8* message, ELOG_LEVEL ll = ELL_INFORMATION);
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static void log(const wchar_t* message, ELOG_LEVEL ll = ELL_INFORMATION);
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static void log(const c8* message, const c8* hint, ELOG_LEVEL ll = ELL_INFORMATION);
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static void log(const c8* message, const io::path& hint, ELOG_LEVEL ll = ELL_INFORMATION);
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static ILogger* Logger;
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};
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// congruential pseudo-random generator
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// numbers identical to std::minstd_rand0
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// period is somewhere around m-1
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class Randomizer
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{
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public:
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//! resets the randomizer
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static void reset(s32 value=0x0f0f0f0f);
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//! generates a pseudo random number in the range 0..randMax()
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static s32 rand();
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//! get maximum number generated by rand()
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static s32 randMax();
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private:
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static s32 seed;
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static const s32 m = 2147483647; // a Mersenne prime (2^31-1)
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static const s32 a = 16807; // another spectral success story
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static const s32 q = m/a;
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static const s32 r = m%a; // again less than q
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static const s32 rMax = m-2;
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};
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class Timer
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{
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public:
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//! returns the current time in milliseconds
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static u32 getTime();
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//! get current time and date in calendar form
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static ITimer::RealTimeDate getRealTimeAndDate();
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//! initializes the real timer
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static void initTimer(bool usePerformanceTimer=true);
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//! sets the current virtual (game) time
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static void setTime(u32 time);
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//! stops the virtual (game) timer
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static void stopTimer();
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//! starts the game timer
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static void startTimer();
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//! sets the speed of the virtual timer
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static void setSpeed(f32 speed);
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//! gets the speed of the virtual timer
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static f32 getSpeed();
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//! returns if the timer currently is stopped
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static bool isStopped();
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//! makes the virtual timer update the time value based on the real time
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static void tick();
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//! returns the current real time in milliseconds
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static u32 getRealTime();
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private:
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static void initVirtualTimer();
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static f32 VirtualTimerSpeed;
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static s32 VirtualTimerStopCounter;
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static u32 StartRealTime;
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static u32 LastVirtualTime;
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static u32 StaticTime;
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};
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} // end namespace os
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} // end namespace irr
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#endif
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