stdlib/srand48_r.c

   1 /* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #include <stdlib.h>
  21 #include <limits.h>
  22
  23 int
  24 srand48_r (seedval, buffer)
  25      long seedval;
  26      struct drand48_data *buffer;
  27 {
  28   /* The standards say we only have 32 bits.  */
  29   if (sizeof (long) > 4)
  30     seedval &= 0xffffffffl;
  31
  32 #if (USHRT_MAX == 0xffffU)
  33   buffer->X[2] = seedval >> 16;
  34   buffer->X[1] = seedval & 0xffffl;
  35   buffer->X[0] = 0x330e;
  36 #else
  37   buffer->X[2] = seedval;
  38   buffer->X[1] = 0x330e0000UL;
  39   buffer->X[0] = 0;
  40 #endif
  41
  42   return 0;
  43 }