jrand48_r.c 1.4 KB

1234567891011121314151617181920212223242526272829303132333435363738
  1. /* Copyright (C) 1995, 1997, 1998, 2001 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);
  19. int jrand48_r (xsubi, buffer, result)
  20. unsigned short int xsubi[3];
  21. struct drand48_data *buffer;
  22. long int *result;
  23. {
  24. /* Compute next state. */
  25. if (__drand48_iterate (xsubi, buffer) < 0)
  26. return -1;
  27. /* Store the result. */
  28. *result = ((xsubi[2] << 16) | xsubi[1]) & 0xffffffffl;
  29. return 0;
  30. }