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glibc/assert/assert.h
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/* Copyright (C) 1991-2016 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, see | |
<http://www.gnu.org/licenses/>. */ | |
/* | |
* 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 | |
# define assert(expr) \ | |
((expr) \ | |
? __ASSERT_VOID_CAST (0) \ | |
: __assert_fail (#expr, __FILE__, __LINE__, __ASSERT_FUNCTION)) | |
# ifdef __USE_GNU | |
# define assert_perror(errnum) \ | |
(!(errnum) \ | |
? __ASSERT_VOID_CAST (0) \ | |
: __assert_perror_fail ((errnum), __FILE__, __LINE__, __ASSERT_FUNCTION)) | |
# 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. */ | |
#if defined __USE_ISOC11 && !defined __cplusplus | |
# undef static_assert | |
# define static_assert _Static_assert | |
#endif |