1/* Copyright (C) 1991-2014 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
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
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
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
17
18/*
19 * ISO C99 Standard: 7.2 Diagnostics <assert.h>
20 */
21
22#ifdef _ASSERT_H
23
24# undef _ASSERT_H
25# undef assert
26# undef __ASSERT_VOID_CAST
27
28# ifdef __USE_GNU
29# undef assert_perror
30# endif
31
32#endif /* assert.h */
33
34#define _ASSERT_H 1
35#include <features.h>
36
37#if defined __cplusplus && __GNUC_PREREQ (2,95)
38# define __ASSERT_VOID_CAST static_cast<void>
39#else
40# define __ASSERT_VOID_CAST (void)
41#endif
42
43/* void assert (int expression);
44
45 If NDEBUG is defined, do nothing.
46 If not, and EXPRESSION is zero, print an error message and abort. */
47
48#ifdef NDEBUG
49
50# define assert(expr) (__ASSERT_VOID_CAST (0))
51
52/* void assert_perror (int errnum);
53
54 If NDEBUG is defined, do nothing. If not, and ERRNUM is not zero, print an
55 error message with the error text for ERRNUM and abort.
56 (This is a GNU extension.) */
57
58# ifdef __USE_GNU
59# define assert_perror(errnum) (__ASSERT_VOID_CAST (0))
60# endif
61
62#else /* Not NDEBUG. */
63
64__BEGIN_DECLS
65
66/* This prints an "Assertion failed" message and aborts. */
67extern void __assert_fail (const char *__assertion, const char *__file,
68 unsigned int __line, const char *__function)
69 __THROW __attribute__ ((__noreturn__));
70
71/* Likewise, but prints the error text for ERRNUM. */
72extern void __assert_perror_fail (int __errnum, const char *__file,
73 unsigned int __line, const char *__function)
74 __THROW __attribute__ ((__noreturn__));
75
76
77/* The following is not at all used here but needed for standard
78 compliance. */
79extern void __assert (const char *__assertion, const char *__file, int __line)
80 __THROW __attribute__ ((__noreturn__));
81
82
83__END_DECLS
84
85# define assert(expr) \
86 ((expr) \
87 ? __ASSERT_VOID_CAST (0) \
88 : __assert_fail (__STRING(expr), __FILE__, __LINE__, __ASSERT_FUNCTION))
89
90# ifdef __USE_GNU
91# define assert_perror(errnum) \
92 (!(errnum) \
93 ? __ASSERT_VOID_CAST (0) \
94 : __assert_perror_fail ((errnum), __FILE__, __LINE__, __ASSERT_FUNCTION))
95# endif
96
97/* Version 2.4 and later of GCC define a magical variable `__PRETTY_FUNCTION__'
98 which contains the name of the function currently being defined.
99 This is broken in G++ before version 2.6.
100 C9x has a similar variable called __func__, but prefer the GCC one since
101 it demangles C++ function names. */
102# if defined __cplusplus ? __GNUC_PREREQ (2, 6) : __GNUC_PREREQ (2, 4)
103# define __ASSERT_FUNCTION __PRETTY_FUNCTION__
104# else
105# if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L
106# define __ASSERT_FUNCTION __func__
107# else
108# define __ASSERT_FUNCTION ((const char *) 0)
109# endif
110# endif
111
112#endif /* NDEBUG. */
113
114
115#if defined __USE_ISOC11 && !defined __cplusplus
116/* Static assertion. Requires support in the compiler. */
117# undef static_assert
118# define static_assert _Static_assert
119#endif
120