stdlib/lcong48_r.c

   1 /* Copyright (C) 1995, 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 <string.h>
  22 #include <limits.h>
  23
  24 int
  25 __lcong48_r (param, buffer)
  26      unsigned short int param[7];
  27      struct drand48_data *buffer;
  28 {
  29   /* Store the given values.  */
  30 #if USHRT_MAX == 0xffffU
  31   memcpy (buffer->X, &param[0], sizeof (buffer->X));
  32   memcpy (buffer->a, &param[3], sizeof (buffer->a));
  33 #else
  34   buffer->X[2] = (param[2] << 16) | param[1];
  35   buffer->X[1] = param[0] << 16;
  36   buffer->X[0] = 0;
  37
  38   buffer->a[2] = (param[5] << 16) | param[4];
  39   buffer->a[1] = param[3] << 16;
  40   buffer->a[0] = 0;
  41 #endif
  42   buffer->c = param[6];
  43   buffer->init = 1;
  44
  45   return 0;
  46 }
  47 weak_alias (__lcong48_r, lcong48_r)