rand.c

来自「ReactOS是一些高手根据Windows XP的内核编写出的类XP。内核实现机」· C语言 代码 · 共 30 行

#include <stdlib.h>

#if defined(__GNUC__)
static unsigned long long next = 0;
#else
static unsigned __int64 next = 0;
#endif

/*
 * @implemented
 */
int rand(void)
{
#if defined(__GNUC__)
	next = next * 0x5deece66dLL + 11;
#else
	next = next * 0x5deece66di64 + 11;
#endif
	return (int)((next >> 16) & RAND_MAX);
}


/*
 * @implemented
 */
void srand(unsigned seed)
{
	next = seed;
}