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/****************************************************************************
*
* Copyright (C) 2014 PX4 Development Team. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name PX4 nor the names of its 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.
*
****************************************************************************/
/**
* @file px4_macros.h
*
* A set of useful macros for enhanced runtime and compile time
* error detection and warning suppression.
*
* Define NO_BLOAT to reduce bloat from file name inclusion.
*
* The arraySize() will compute the size of an array regardless
* it's type
*
* INVALID_CASE(c) should be used is case statements to ferret out
* unintended behavior
*
* UNUSED(var) will suppress compile time warnings of unused
* variables
*
* CCASSERT(predicate) Will generate a compile time error it the
* predicate is false
*/
#include <assert.h>
#ifndef _PX4_MACROS_H
#define _PX4_MACROS_H
#if !defined(arraySize)
#define arraySize(a) (sizeof((a))/sizeof((a[0])))
#endif
#if !defined(NO_BLOAT)
#if defined(__BASE_FILE__)
#define _FILE_NAME_ __BASE_FILE__
#else
#define _FILE_NAME_ __FILE__
#endif
#else
#define _FILE_NAME_ ""
#endif
#if !defined(INVALID_CASE)
#define INVALID_CASE(c) printf("Invalid Case %d, %s:%d",(c),__BASE_FILE__,__LINE__) /* todo use PANIC */
#endif
#if !defined(UNUSED)
#define UNUSED(var) (void)(var)
#endif
#if !defined(CAT)
#if !defined(_CAT)
#define _CAT(a, b) a ## b
#endif
#define CAT(a, b) _CAT(a, b)
#endif
#if !defined(CCASSERT)
#if defined(static_assert)
# define CCASSERT(predicate) static_assert(predicate)
# else
# define CCASSERT(predicate) _x_CCASSERT_LINE(predicate, __LINE__)
# if !defined(_x_CCASSERT_LINE)
# define _x_CCASSERT_LINE(predicate, line) typedef char CAT(constraint_violated_on_line_,line)[2*((predicate)!=0)-1] __attribute__ ((unused)) ;
# endif
# endif
#endif
#endif /* _PX4_MACROS_H */
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