59 lines
1.3 KiB
C
Executable File
59 lines
1.3 KiB
C
Executable File
#include "types.h"
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#include "timer.h"
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/******************************************************************************/
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/* Fonction qui retourne la valeur absolue */
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u32 abs(int x) {
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if (x < 0)
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x = -x;
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return (u32) x;
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}
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/******************************************************************************/
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/* Fonction qui initialise le générateur de nombre aléatoire */
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static u32 seed=0x12341234;
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void randomize() {
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seed=gettimer();
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}
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/******************************************************************************/
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/* Fonction qui renvoie un nombre aléatoire */
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u32 rand()
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{
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u32 next = seed;
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int result;
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next *= 1103515245;
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next += 12345;
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result = (unsigned int) (next / 65536) % 2048;
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next *= 1103515245;
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next += 12345;
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result <<= 10;
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result ^= (unsigned int) (next / 65536) % 1024;
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next *= 1103515245;
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next += 12345;
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result <<= 10;
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result ^= (unsigned int) (next / 65536) % 1024;
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seed = next;
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return result;
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}
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/******************************************************************************/
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/* Fonction qui renvoie un nombre aléatoire borné */
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u32 random(u32 lower, u32 upper) {
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return (rand() % (upper - lower + 1)) + lower;
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}
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