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/*
* SDL Graphics Extension
* Misc functions
*
* Started 990819
*
* License: LGPL v2+ (see the file LICENSE)
* (c)1999-2003 Anders Lindstrm
*/
/*********************************************************************
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Library General Public *
* License as published by the Free Software Foundation; either *
* version 2 of the License, or (at your option) any later version. *
*********************************************************************/
#include "SDL.h"
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include <math.h>
#include "sge_misc.h"
Uint32 delay_res=10;
//==================================================================================
// Returns a random integer between min and max
//==================================================================================
int sge_Random(int min, int max)
{
return min+(rand()%(max-min+1));
}
//==================================================================================
// Seed the random number generator with a number from the system clock.
// Should be called once before the first use of sge_Random.
//==================================================================================
void sge_Randomize(void)
{
srand(time(NULL));
}
//==================================================================================
// Test the resolution of SDL_Delay()
//==================================================================================
Uint32 sge_CalibrateDelay(void)
{
SDL_Delay(10);
delay_res=SDL_GetTicks();
SDL_Delay(1);
delay_res=SDL_GetTicks()-delay_res;
return delay_res;
}
//==================================================================================
// Get the resolution of SDL_Delay()
//==================================================================================
Uint32 sge_DelayRes(void)
{
return delay_res;
}
//==================================================================================
// Delay 'ticks' ms.
// Tries to burn time in SDL_Delay() if possible
// Returns the exact delay time
//==================================================================================
Uint32 sge_Delay(Uint32 ticks)
{
Uint32 start = SDL_GetTicks();
Sint32 time_left = (Sint32)ticks;
Uint32 tmp;
if(ticks >= delay_res){
tmp=ticks-(ticks%delay_res);
SDL_Delay(tmp);
time_left=(Sint32)(ticks-(SDL_GetTicks()-start)); //Possible error for large ticks... nah
}
while(time_left>0){
time_left=ticks-(SDL_GetTicks()-start);
}
return SDL_GetTicks()-start;
}
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