assert.h 2.2 KB

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  1. /* Copyright (C) 1991,1992,1994-1999,2000,2001 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. The GNU C Library is free software; you can redistribute it and/or
  4. modify it under the terms of the GNU Lesser General Public
  5. License as published by the Free Software Foundation; either
  6. version 2.1 of the License, or (at your option) any later version.
  7. The GNU C Library is distributed in the hope that it will be useful,
  8. but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  10. Lesser General Public License for more details.
  11. You should have received a copy of the GNU Lesser General Public
  12. License along with the GNU C Library; if not, write to the Free
  13. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  14. 02111-1307 USA. */
  15. /*
  16. * ISO C99 Standard: 7.2 Diagnostics <assert.h>
  17. */
  18. #ifndef __ASSERT_H
  19. #define __ASSERT_H
  20. #include <features.h>
  21. /* If NDEBUG is defined, do nothing.
  22. If not, and EXPRESSION is zero, print an error message and abort. */
  23. #ifdef NDEBUG
  24. #define assert(expr) ((void) 0)
  25. #else /* Not NDEBUG. */
  26. extern void __assert __P((const char *, const char *, int, const char *));
  27. #define assert(expr) \
  28. ((void) ((expr) || \
  29. (__assert (__STRING(expr), \
  30. __FILE__, __LINE__, __ASSERT_FUNCTION), 0)))
  31. /* Version 2.4 and later of GCC define a magical variable `__PRETTY_FUNCTION__'
  32. which contains the name of the function currently being defined.
  33. # define __ASSERT_FUNCTION __PRETTY_FUNCTION__
  34. This is broken in G++ before version 2.6.
  35. C9x has a similar variable called __func__, but prefer the GCC one since
  36. it demangles C++ function names. */
  37. # ifdef __GNUC__
  38. # if __GNUC__ > 2 || (__GNUC__ == 2 \
  39. && __GNUC_MINOR__ >= (defined __cplusplus ? 6 : 4))
  40. # define __ASSERT_FUNCTION __PRETTY_FUNCTION__
  41. # else
  42. # define __ASSERT_FUNCTION ((__const char *) 0)
  43. # endif
  44. # else
  45. # if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L
  46. # define __ASSERT_FUNCTION __func__
  47. # else
  48. # define __ASSERT_FUNCTION ((__const char *) 0)
  49. # endif
  50. # endif
  51. #endif /* NDEBUG. */
  52. #endif /* __ASSERT_H */