-/* Copyright (C) 1991, 92, 94, 95, 96 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
+/* Copyright (C) 1991-2020 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 Library General Public License as
-published by the Free Software Foundation; either version 2 of the
-License, or (at your option) any later version.
+ 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
-Library General Public License for more details.
+ 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 Library General Public
-License along with the GNU C Library; see the file COPYING.LIB. If
-not, write to the Free Software Foundation, Inc., 675 Mass Ave,
-Cambridge, MA 02139, USA. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
/*
- *
ANSI Standard: 4.2 DIAGNOSTICS <assert.h>
+ *
ISO C99 Standard: 7.2 Diagnostics <assert.h>
*/
#ifdef _ASSERT_H
-#undef _ASSERT_H
-#undef assert
+# 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.
#ifdef NDEBUG
-#define assert(expr) ((void) 0)
+# define assert(expr) (__ASSERT_VOID_CAST (0))
/* void assert_perror (int errnum);
error message with the error text for ERRNUM and abort.
(This is a GNU extension.) */
-#ifdef __USE_GNU
-#define assert_perror(errnum) ((void) 0)
-#endif
+# ifdef __USE_GNU
+# define assert_perror(errnum) (__ASSERT_VOID_CAST (0))
+# endif
#else /* Not NDEBUG. */
-#include <sys/cdefs.h>
-
__BEGIN_DECLS
/* This prints an "Assertion failed" message and aborts. */
-extern void __assert_fail __P ((__const char *__assertion,
- __const char *__file,
- unsigned int __line,
- __const char *__function))
- __attribute__ ((__noreturn__));
+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 __P ((int __errnum,
- __const char *__file,
- unsigned int __line,
- __const char *__function))
- __attribute__ ((__noreturn__));
+extern void __assert_perror_fail (int __errnum, const char *__file,
+ unsigned int __line, const char *__function)
+ __THROW __attribute__ ((__noreturn__));
-__END_DECLS
-#define assert(expr) \
- ((void) ((expr) || \
- (__assert_fail (__STRING(expr), \
- __FILE__, __LINE__, __ASSERT_FUNCTION), 0)))
+/* 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__));
-#ifdef __USE_GNU
-#define assert_perror(errnum) \
- ((void) ((errnum) && (__assert_perror_fail ((errnum), \
- __FILE__, __LINE__, \
- __ASSERT_FUNCTION), 0)))
-#endif
+
+__END_DECLS
+
+/* When possible, define assert so that it does not add extra
+ parentheses around EXPR. Otherwise, those added parentheses would
+ suppress warnings we'd expect to be detected by gcc's -Wparentheses. */
+# if defined __cplusplus
+# define assert(expr) \
+ (static_cast <bool> (expr) \
+ ? void (0) \
+ : __assert_fail (#expr, __FILE__, __LINE__, __ASSERT_FUNCTION))
+# elif !defined __GNUC__ || defined __STRICT_ANSI__
+# define assert(expr) \
+ ((expr) \
+ ? __ASSERT_VOID_CAST (0) \
+ : __assert_fail (#expr, __FILE__, __LINE__, __ASSERT_FUNCTION))
+# else
+/* The first occurrence of EXPR is not evaluated due to the sizeof,
+ but will trigger any pedantic warnings masked by the __extension__
+ for the second occurrence. The ternary operator is required to
+ support function pointers and bit fields in this context, and to
+ suppress the evaluation of variable length arrays. */
+# define assert(expr) \
+ ((void) sizeof ((expr) ? 1 : 0), __extension__ ({ \
+ if (expr) \
+ ; /* empty */ \
+ else \
+ __assert_fail (#expr, __FILE__, __LINE__, __ASSERT_FUNCTION); \
+ }))
+# endif
+
+# 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. */
-#if (!defined (__GNUC__) || __GNUC__ < 2 || \
- __GNUC_MINOR__ < (defined (__cplusplus) ? 6 : 4))
-#define __ASSERT_FUNCTION ((__const char *) 0)
-#else
-#define __ASSERT_FUNCTION __PRETTY_FUNCTION__
-#endif
-
+ 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 __extension__ __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
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