# assert.h

/* Copyright (c) 2005,2007 Joerg Wunsch

Portions of documentation Copyright (c) 1991, 1993
The Regents of the University of California.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.

* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.

* Neither the name of the copyright holders nor the names of
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.

$Id$
*/

/** \file */
/** \defgroup avr_assert <assert.h>: Diagnostics
\code #include <assert.h> \endcode

This header file defines a debugging aid.

As there is no standard error output stream available for many
applications using this library, the generation of a printable
error message is not enabled by default.  These messages will
only be generated if the application defines the macro

\code __ASSERT_USE_STDERR \endcode

before including the \c <assert.h> header file.  By default,
only abort() will be called to halt the application.
*/

/*@{*/

/*
* The ability to include this file (with or without NDEBUG) is a
* feature.
*/

#undef assert

#include <stdlib.h>

#if defined(__DOXYGEN__)
/**
* \def assert
* \param expression Expression to test for.
*
* The assert() macro tests the given expression and if it is false,
* the calling process is terminated.  A diagnostic message is written
* to stderr and the function abort() is called, effectively
* terminating the program.
*
* If expression is true, the assert() macro does nothing.
*
* The assert() macro may be removed at compile time by defining
* NDEBUG as a macro (e.g., by using the compiler option -DNDEBUG).
*/
#  define assert(expression)

#else /* !DOXYGEN */

#  if defined(NDEBUG)
#    define assert(e)   ((void)0)
#  else /* !NDEBUG */
#    if defined(__ASSERT_USE_STDERR)
#      define assert(e) ((e) ? (void)0 : \
__assert(__func__, __FILE__, __LINE__, #e))
#    else /* !__ASSERT_USE_STDERR */
#      define assert(e) ((e) ? (void)0 : abort())
#    endif /* __ASSERT_USE_STDERR */
#  endif /* NDEBUG */
#endif /* DOXYGEN */

#ifdef __cplusplus
extern "C" {
#endif

#if !defined(__DOXYGEN__)

extern void __assert(const char *__func, const char *__file,
int __lineno, const char *__sexp);

#endif /* not __DOXYGEN__ */

#ifdef __cplusplus
}
#endif

/*@}*/
/* EOF */