/* Copyright (C) 1991-2018 Free Software Foundation, Inc.

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This file is part of the GNU C Library.

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The GNU C Library is free software; you can redistribute it and/or

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modify it under the terms of the GNU Lesser General Public

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License as published by the Free Software Foundation; either

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version 2.1 of the License, or (at your option) any later version.

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The GNU C Library is distributed in the hope that it will be useful,

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but WITHOUT ANY WARRANTY; without even the implied warranty of

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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

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Lesser General Public License for more details.

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You should have received a copy of the GNU Lesser General Public

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License along with the GNU C Library; if not, see

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<http://www.gnu.org/licenses/>. */

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/*

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* ISO C99 Standard: 7.2 Diagnostics <assert.h>

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*/

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#ifdef _ASSERT_H

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# undef _ASSERT_H

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# undef assert

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# undef __ASSERT_VOID_CAST

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# ifdef __USE_GNU

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# undef assert_perror

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# endif

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#endif /* assert.h */

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#define _ASSERT_H 1

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#include <features.h>

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#if defined __cplusplus && __GNUC_PREREQ (2,95)

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# define __ASSERT_VOID_CAST static_cast<void>

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#else

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# define __ASSERT_VOID_CAST (void)

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#endif

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/* void assert (int expression);

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If NDEBUG is defined, do nothing.

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If not, and EXPRESSION is zero, print an error message and abort. */

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#ifdef NDEBUG

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# define assert(expr) (__ASSERT_VOID_CAST (0))

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/* void assert_perror (int errnum);

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If NDEBUG is defined, do nothing. If not, and ERRNUM is not zero, print an

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error message with the error text for ERRNUM and abort.

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(This is a GNU extension.) */

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# ifdef __USE_GNU

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# define assert_perror(errnum) (__ASSERT_VOID_CAST (0))

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# endif

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#else /* Not NDEBUG. */

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__BEGIN_DECLS

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/* This prints an "Assertion failed" message and aborts. */

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extern void __assert_fail (const char *__assertion, const char *__file,

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unsigned int __line, const char *__function)

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__THROW __attribute__ ((__noreturn__));

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/* Likewise, but prints the error text for ERRNUM. */

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extern void __assert_perror_fail (int __errnum, const char *__file,

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unsigned int __line, const char *__function)

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__THROW __attribute__ ((__noreturn__));

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/* The following is not at all used here but needed for standard

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compliance. */

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extern void __assert (const char *__assertion, const char *__file, int __line)

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__THROW __attribute__ ((__noreturn__));

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__END_DECLS

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/* When possible, define assert so that it does not add extra

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parentheses around EXPR. Otherwise, those added parentheses would

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suppress warnings we'd expect to be detected by gcc's -Wparentheses. */

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# if defined __cplusplus

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# define assert(expr) \

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(static_cast <bool> (expr) \

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? void (0) \

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: __assert_fail (#expr, __FILE__, __LINE__, __ASSERT_FUNCTION))

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# elif !defined __GNUC__ || defined __STRICT_ANSI__

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# define assert(expr) \

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((expr) \

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? __ASSERT_VOID_CAST (0) \

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: __assert_fail (#expr, __FILE__, __LINE__, __ASSERT_FUNCTION))

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# else

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/* The first occurrence of EXPR is not evaluated due to the sizeof,

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but will trigger any pedantic warnings masked by the __extension__

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for the second occurrence. The ternary operator is required to

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support function pointers and bit fields in this context, and to

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suppress the evaluation of variable length arrays. */

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# define assert(expr) \

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((void) sizeof ((expr) ? 1 : 0), __extension__ ({ \

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if (expr) \

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; /* empty */ \

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else \

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__assert_fail (#expr, __FILE__, __LINE__, __ASSERT_FUNCTION); \

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}))

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# endif

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# ifdef __USE_GNU

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# define assert_perror(errnum) \

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(!(errnum) \

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? __ASSERT_VOID_CAST (0) \

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: __assert_perror_fail ((errnum), __FILE__, __LINE__, __ASSERT_FUNCTION))

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# endif

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/* Version 2.4 and later of GCC define a magical variable `__PRETTY_FUNCTION__'

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which contains the name of the function currently being defined.

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This is broken in G++ before version 2.6.

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C9x has a similar variable called __func__, but prefer the GCC one since

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it demangles C++ function names. */

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# if defined __cplusplus ? __GNUC_PREREQ (2, 6) : __GNUC_PREREQ (2, 4)

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# define __ASSERT_FUNCTION __extension__ __PRETTY_FUNCTION__

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# else

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# if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L

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# define __ASSERT_FUNCTION __func__

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# else

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# define __ASSERT_FUNCTION ((const char *) 0)

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# endif

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# endif

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#endif /* NDEBUG. */

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#if defined __USE_ISOC11 && !defined __cplusplus

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# undef static_assert

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# define static_assert _Static_assert

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#endif

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