compiler/clib/seed48.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 <sys/cdefs.h>
  15 __FBSDID("$FreeBSD$");
  16
  17 #include "rand48.h"
  18
  19 extern unsigned short _rand48_seed[3];
  20 extern unsigned short _rand48_mult[3];
  21 extern unsigned short _rand48_add;
  22
  23 /*****************************************************************************
  24
  25     NAME */
  26
  27         unsigned short *seed48(
  28
  29 /*  SYNOPSIS */
  30         unsigned short xseed[3])
  31
  32 /*  FUNCTION
  33
  34     INPUTS
  35
  36     RESULT
  37
  38     NOTES
  39
  40     EXAMPLE
  41
  42     BUGS
  43
  44     SEE ALSO
  45
  46     INTERNALS
  47
  48 ******************************************************************************/
  49 {
  50         static unsigned short sseed[3];
  51
  52         sseed[0] = _rand48_seed[0];
  53         sseed[1] = _rand48_seed[1];
  54         sseed[2] = _rand48_seed[2];
  55         _rand48_seed[0] = xseed[0];
  56         _rand48_seed[1] = xseed[1];
  57         _rand48_seed[2] = xseed[2];
  58         _rand48_mult[0] = RAND48_MULT_0;
  59         _rand48_mult[1] = RAND48_MULT_1;
  60         _rand48_mult[2] = RAND48_MULT_2;
  61         _rand48_add = RAND48_ADD;
  62         return sseed;
  63 }
  64