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authorRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
committerRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
commit28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch)
tree15f07c4c43d635959c6afee96bde71fb1b3614ee /assert/assert.h
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+/* Copyright (C) 1991, 1992, 1994, 1995 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 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.
+
+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, 1992 Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+/*
+ * ANSI Standard: 4.2 DIAGNOSTICS <assert.h>
+ */
+
+#ifdef _ASSERT_H
+
+#undef _ASSERT_H
+#undef assert
+
+#endif /* assert.h */
+
+#define _ASSERT_H 1
+#include <features.h>
+
+/* 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) ((void) 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) ((void) 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__));
+
+/* 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__));
+
+__END_DECLS
+
+#define assert(expr) \
+ ((void) ((expr) || \
+ (__assert_fail (__STRING(expr), \
+ __FILE__, __LINE__, __ASSERT_FUNCTION), 0)))
+
+#ifdef __USE_GNU
+#define assert_perror(errnum) \
+ ((void) ((errnum) && (__assert_perror_fail ((errnum), \
+ __FILE__, __LINE__, \
+ __ASSERT_FUNCTION), 0)))
+#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
+
+
+#endif /* NDEBUG. */
+