seed48_r.c 1.5 KB

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  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, write to the Free
  14. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  15. 02111-1307 USA. */
  16. #include <stdlib.h>
  17. #include <string.h>
  18. #include <limits.h>
  19. /* Experimentally off - libc_hidden_proto(memcpy) */
  20. libc_hidden_proto(seed48_r)
  21. int seed48_r (unsigned short int seed16v[3], struct drand48_data *buffer)
  22. {
  23. /* Save old value at a private place to be used as return value. */
  24. memcpy (buffer->__old_x, buffer->__x, sizeof (buffer->__x));
  25. /* Install new state. */
  26. buffer->__x[2] = seed16v[2];
  27. buffer->__x[1] = seed16v[1];
  28. buffer->__x[0] = seed16v[0];
  29. buffer->__a = 0x5deece66dull;
  30. buffer->__c = 0xb;
  31. buffer->__init = 1;
  32. return 0;
  33. }
  34. libc_hidden_def(seed48_r)