rand.c

这是一个开放源代码的与WINNT/WIN2K/WIN2003兼容的操作系统

/* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
#include <precomp.h>

#include <internal/tls.h>

/*
 * @implemented
 */
int
rand(void)
{
  PTHREADDATA ThreadData = GetThreadData();

  ThreadData->tnext = ThreadData->tnext * 0x5deece66dLL + 2531011;
  return (int)((ThreadData->tnext >> 16) & RAND_MAX);
}

/*
 * @implemented
 */
void
srand(unsigned int seed)
{
  PTHREADDATA ThreadData = GetThreadData();

  ThreadData->tnext = (ULONGLONG)seed;
}