stdlib/nrand48_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 Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the 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    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <stdlib.h>
  21
  22 int
  23 __nrand48_r (xsubi, buffer, result)
  24      unsigned short int xsubi[3];
  25      struct drand48_data *buffer;
  26      long int *result;
  27 {
  28   /* Compute next state.  */
  29   if (__drand48_iterate (xsubi, buffer) < 0)
  30     return -1;
  31
  32   /* Store the result.  */
  33   if (sizeof (unsigned short int) == 2)
  34     *result = xsubi[2] << 15 | xsubi[1] >> 1;
  35   else
  36     *result = xsubi[2] >> 1;
  37
  38   return 0;
  39 }
  40 weak_alias (__nrand48_r, nrand48_r)