1/* Copyright (C) 1991-2020 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 <https://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#ifndef _ASSERT_H_DECLS 
65#define _ASSERT_H_DECLS 
66__BEGIN_DECLS 
67 
68/* This prints an "Assertion failed" message and aborts. */ 
69extern void __assert_fail (const char *__assertion, const char *__file, 
70 unsigned int __line, const char *__function) 
71 __THROW __attribute__ ((__noreturn__)); 
72 
73/* Likewise, but prints the error text for ERRNUM. */ 
74extern void __assert_perror_fail (int __errnum, const char *__file, 
75 unsigned int __line, const char *__function) 
76 __THROW __attribute__ ((__noreturn__)); 
77 
78 
79/* The following is not at all used here but needed for standard 
80 compliance. */ 
81extern void __assert (const char *__assertion, const char *__file, int __line) 
82 __THROW __attribute__ ((__noreturn__)); 
83 
84 
85__END_DECLS 
86#endif /* Not _ASSERT_H_DECLS */ 
87 
88/* When possible, define assert so that it does not add extra 
89 parentheses around EXPR. Otherwise, those added parentheses would 
90 suppress warnings we'd expect to be detected by gcc's -Wparentheses. */ 
91# if defined __cplusplus 
92# define assert(expr) \ 
93 (static_cast <bool> (expr) \ 
94 ? void (0) \ 
95 : __assert_fail (#expr, __FILE__, __LINE__, __ASSERT_FUNCTION)) 
96# elif !defined __GNUC__ || defined __STRICT_ANSI__ 
97# define assert(expr) \ 
98 ((expr) \ 
99 ? __ASSERT_VOID_CAST (0) \ 
100 : __assert_fail (#expr, __FILE__, __LINE__, __ASSERT_FUNCTION)) 
101# else 
102/* The first occurrence of EXPR is not evaluated due to the sizeof, 
103 but will trigger any pedantic warnings masked by the __extension__ 
104 for the second occurrence. The ternary operator is required to 
105 support function pointers and bit fields in this context, and to 
106 suppress the evaluation of variable length arrays. */ 
107# define assert(expr) \ 
108 ((void) sizeof ((expr) ? 1 : 0), __extension__ ({ \ 
109 if (expr) \ 
110 ; /* empty */ \ 
111 else \ 
112 __assert_fail (#expr, __FILE__, __LINE__, __ASSERT_FUNCTION); \ 
113 })) 
114# endif 
115 
116# ifdef __USE_GNU 
117# define assert_perror(errnum) \ 
118 (!(errnum) \ 
119 ? __ASSERT_VOID_CAST (0) \ 
120 : __assert_perror_fail ((errnum), __FILE__, __LINE__, __ASSERT_FUNCTION)) 
121# endif 
122 
123/* Version 2.4 and later of GCC define a magical variable `__PRETTY_FUNCTION__' 
124 which contains the name of the function currently being defined. 
125 This is broken in G++ before version 2.6. 
126 C9x has a similar variable called __func__, but prefer the GCC one since 
127 it demangles C++ function names. */ 
128# if defined __cplusplus ? __GNUC_PREREQ (2, 6) : __GNUC_PREREQ (2, 4) 
129# define __ASSERT_FUNCTION __extension__ __PRETTY_FUNCTION__ 
130# else 
131# if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L 
132# define __ASSERT_FUNCTION __func__ 
133# else 
134# define __ASSERT_FUNCTION ((const char *) 0) 
135# endif 
136# endif 
137 
138#endif /* NDEBUG. */ 
139 
140 
141#if defined __USE_ISOC11 && !defined __cplusplus 
142# undef static_assert 
143# define static_assert _Static_assert 
144#endif 
145