reactos/lib/sdk/crt/math/rand.c

   1 /* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
   2 #include <precomp.h>
   3
   4 #include <internal/tls.h>
   5
   6 /*
   7  * @implemented
   8  */
   9 int
  10 rand(void)
  11 {
  12   PTHREADDATA ThreadData = GetThreadData();
  13
  14   ThreadData->tnext = ThreadData->tnext * 0x5deece66dLL + 2531011;
  15   return (int)((ThreadData->tnext >> 16) & RAND_MAX);
  16 }
  17
  18 /*
  19  * @implemented
  20  */
  21 void
  22 srand(unsigned int seed)
  23 {
  24   PTHREADDATA ThreadData = GetThreadData();
  25
  26   ThreadData->tnext = (ULONGLONG)seed;
  27 }