newlib/libc/stdlib/srand48.c

   1 /*
   2  * Copyright (c) 1993 Martin Birgmeier
   3  * All rights reserved.
   4  *
   5  * You may redistribute unmodified or modified versions of this source
   6  * code provided that the above copyright notice and this and the
   7  * following conditions are retained.
   8  *
   9  * This software is provided ``as is'', and comes with no warranties
  10  * of any kind. I shall in no event be liable for anything that happens
  11  * to anyone/anything when using this software.
  12  */
  13
  14 #include "rand48.h"
  15
  16 void
  17 _srand48_r (struct _reent *r,
  18        long seed)
  19 {
  20   _REENT_CHECK_RAND48(r);
  21   __rand48_seed[0] = _RAND48_SEED_0;
  22   __rand48_seed[1] = (unsigned short) seed;
  23   __rand48_seed[2] = (unsigned short) ((unsigned long)seed >> 16);
  24   __rand48_mult[0] = _RAND48_MULT_0;
  25   __rand48_mult[1] = _RAND48_MULT_1;
  26   __rand48_mult[2] = _RAND48_MULT_2;
  27   __rand48_add = _RAND48_ADD;
  28 }
  29
  30 #ifndef _REENT_ONLY
  31 void
  32 srand48 (long seed)
  33 {
  34   _srand48_r (_REENT, seed);
  35 }
  36 #endif /* !_REENT_ONLY */