seed48_r.c 1.4 KB

123456789101112131415161718192021222324252627282930313233343536373839
  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>, 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, see
  14. <http://www.gnu.org/licenses/>. */
  15. #include <stdlib.h>
  16. #include <string.h>
  17. #include <limits.h>
  18. int seed48_r (unsigned short int seed16v[3], struct drand48_data *buffer)
  19. {
  20. /* Save old value at a private place to be used as return value. */
  21. memcpy (buffer->__old_x, buffer->__x, sizeof (buffer->__x));
  22. /* Install new state. */
  23. buffer->__x[2] = seed16v[2];
  24. buffer->__x[1] = seed16v[1];
  25. buffer->__x[0] = seed16v[0];
  26. buffer->__a = 0x5deece66dull;
  27. buffer->__c = 0xb;
  28. buffer->__init = 1;
  29. return 0;
  30. }
  31. libc_hidden_def(seed48_r)