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/* Copyright (C) 1991,1992,1994-2001,2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
/*
* ISO C99 Standard: 7.2 Diagnostics <assert.h>
*/
#ifdef _ASSERT_H
# undef _ASSERT_H
# undef assert
# undef __ASSERT_VOID_CAST
# ifdef __USE_GNU
# undef assert_perror
# endif
#endif /* assert.h */
#define _ASSERT_H 1
#include <features.h>
#if defined __cplusplus && __GNUC_PREREQ (2,95)
# define __ASSERT_VOID_CAST static_cast<void>
#else
# define __ASSERT_VOID_CAST (void)
#endif
/* void assert (int expression);
If NDEBUG is defined, do nothing.
If not, and EXPRESSION is zero, print an error message and abort. */
#ifdef NDEBUG
# define assert(expr) (__ASSERT_VOID_CAST (0))
/* void assert_perror (int errnum);
If NDEBUG is defined, do nothing. If not, and ERRNUM is not zero, print an
error message with the error text for ERRNUM and abort.
(This is a GNU extension.) */
# ifdef __USE_GNU
# define assert_perror(errnum) (__ASSERT_VOID_CAST (0))
# endif
#else /* Not NDEBUG. */
__BEGIN_DECLS
/* This prints an "Assertion failed" message and aborts. */
extern void __assert_fail (__const char *__assertion, __const char *__file,
unsigned int __line, __const char *__function)
__THROW __attribute__ ((__noreturn__));
/* Likewise, but prints the error text for ERRNUM. */
extern void __assert_perror_fail (int __errnum, __const char *__file,
unsigned int __line,
__const char *__function)
__THROW __attribute__ ((__noreturn__));
/* The following is not at all used here but needed for standard
compliance. */
extern void __assert (const char *__assertion, const char *__file, int __line)
__THROW __attribute__ ((__noreturn__));
__END_DECLS
/* For the macro definition we use gcc's __builtin_expect if possible
to generate good code for the non-error case. gcc 3.0 is a good
enough estimate for when the feature became available. */
# if __GNUC_PREREQ (3, 0)
# define assert(expr) \
(__ASSERT_VOID_CAST (__builtin_expect (!!(expr), 1) ? 0 : \
(__assert_fail (__STRING(expr), __FILE__, __LINE__, \
__ASSERT_FUNCTION), 0)))
# else
# define assert(expr) \
(__ASSERT_VOID_CAST ((expr) ? 0 : \
(__assert_fail (__STRING(expr), __FILE__, __LINE__, \
__ASSERT_FUNCTION), 0)))
# endif
# ifdef __USE_GNU
# if __GNUC_PREREQ (3, 0)
# define assert_perror(errnum) \
(__ASSERT_VOID_CAST (!(errnum) ? 0 : \
(__assert_perror_fail ((errnum), __FILE__, __LINE__, \
__ASSERT_FUNCTION), 0)))
# else
# define assert_perror(errnum) \
(__ASSERT_VOID_CAST (__builtin_expect (!(errnum), 1) ? 0 : \
(__assert_perror_fail ((errnum), __FILE__, __LINE__, \
__ASSERT_FUNCTION), 0)))
# endif
# endif
/* Version 2.4 and later of GCC define a magical variable `__PRETTY_FUNCTION__'
which contains the name of the function currently being defined.
This is broken in G++ before version 2.6.
C9x has a similar variable called __func__, but prefer the GCC one since
it demangles C++ function names. */
# if defined __cplusplus ? __GNUC_PREREQ (2, 6) : __GNUC_PREREQ (2, 4)
# define __ASSERT_FUNCTION __PRETTY_FUNCTION__
# else
# if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L
# define __ASSERT_FUNCTION __func__
# else
# define __ASSERT_FUNCTION ((__const char *) 0)
# endif
# endif
#endif /* NDEBUG. */
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