nrand48_r.c 1.5 KB

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  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. 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. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; if not, write to the Free
  14. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  15. 02111-1307 USA. */
  16. #include <stdlib.h>
  17. extern int __drand48_iterate(unsigned short xsubi[3],
  18. struct drand48_data *buffer) attribute_hidden;
  19. libc_hidden_proto(nrand48_r)
  20. int nrand48_r (unsigned short int xsubi[3], struct drand48_data *buffer, long int *result)
  21. {
  22. /* Compute next state. */
  23. if (__drand48_iterate (xsubi, buffer) < 0)
  24. return -1;
  25. /* Store the result. */
  26. if (sizeof (unsigned short int) == 2)
  27. *result = xsubi[2] << 15 | xsubi[1] >> 1;
  28. else
  29. *result = xsubi[2] >> 1;
  30. return 0;
  31. }
  32. libc_hidden_def(nrand48_r)