huge_vall.h 1.2 KB

1234567891011121314151617181920212223242526272829
  1. /* Default `HUGE_VALL' constant.
  2. Used by <stdlib.h> and <math.h> functions for overflow.
  3. Copyright (C) 1992, 1996, 1997, 2004 Free Software Foundation, Inc.
  4. This file is part of the GNU C Library.
  5. The GNU C Library is free software; you can redistribute it and/or
  6. modify it under the terms of the GNU Lesser General Public
  7. License as published by the Free Software Foundation; either
  8. version 2.1 of the License, or (at your option) any later version.
  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. You should have received a copy of the GNU Lesser General Public
  14. License along with the GNU C Library; if not, write to the Free
  15. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  16. 02111-1307 USA. */
  17. #ifndef _MATH_H
  18. # error "Never use <bits/huge_vall.h> directly; include <math.h> instead."
  19. #endif
  20. #if __GNUC_PREREQ(3,3)
  21. # define HUGE_VALL (__builtin_huge_vall())
  22. #else
  23. # define HUGE_VALL ((long double) HUGE_VAL)
  24. #endif