libc/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 <mailto: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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <stdlib.h>
  20
  21 int nrand48_r (unsigned short int xsubi[3], struct drand48_data *buffer, long int *result)
  22 {
  23     /* Compute next state.  */
  24     if (__drand48_iterate (xsubi, buffer) < 0)
  25         return -1;
  26
  27     /* Store the result.  */
  28     if (sizeof (unsigned short int) == 2)
  29         *result = xsubi[2] << 15 | xsubi[1] >> 1;
  30     else
  31         *result = xsubi[2] >> 1;
  32
  33     return 0;
  34 }
  35 libc_hidden_def(nrand48_r)