--- /dev/null
+/* Copyright (C) 1991-2018 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. */
+
+#ifndef _ASSERT_H_DECLS
+#define _ASSERT_H_DECLS
+__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
+#endif /* Not _ASSERT_H_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.
+ 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