stdlib/nrand48_r.c

   1 /* Copyright (C) 1995-2022 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <stdlib.h>
  19
  20 int
  21 __nrand48_r (unsigned short int xsubi[3], struct drand48_data *buffer,
  22              long int *result)
  23 {
  24   /* Compute next state.  */
  25   if (__drand48_iterate (xsubi, buffer) < 0)
  26     return -1;
  27
  28   /* Store the result.  */
  29   if (sizeof (unsigned short int) == 2)
  30     *result = xsubi[2] << 15 | xsubi[1] >> 1;
  31   else
  32     *result = xsubi[2] >> 1;
  33
  34   return 0;
  35 }
  36 weak_alias (__nrand48_r, nrand48_r)