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# assert.h

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00001 /* Copyright (c) 2005,2007 Joerg Wunsch
00003
00004    Portions of documentation Copyright (c) 1991, 1993
00005    The Regents of the University of California.
00006
00008
00009    Redistribution and use in source and binary forms, with or without
00010    modification, are permitted provided that the following conditions are met:
00011
00012    * Redistributions of source code must retain the above copyright
00013      notice, this list of conditions and the following disclaimer.
00014
00015    * Redistributions in binary form must reproduce the above copyright
00016      notice, this list of conditions and the following disclaimer in
00017      the documentation and/or other materials provided with the
00018      distribution.
00019
00020    * Neither the name of the copyright holders nor the names of
00021      contributors may be used to endorse or promote products derived
00022      from this software without specific prior written permission.
00023
00024   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00025   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00026   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00027   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
00028   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
00029   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
00030   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
00031   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
00032   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
00033   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
00034   POSSIBILITY OF SUCH DAMAGE.
00035
00036   $Id: assert.h 1196 2007-01-23 15:34:58Z joerg_wunsch$
00037 */
00038
00039 /** \file */
00040 /** \defgroup avr_assert <assert.h>: Diagnostics
00041     \code #include <assert.h> \endcode
00042
00043     This header file defines a debugging aid.
00044
00045     As there is no standard error output stream available for many
00046     applications using this library, the generation of a printable
00047     error message is not enabled by default.  These messages will
00048     only be generated if the application defines the macro
00049
00050     \code __ASSERT_USE_STDERR \endcode
00051
00052     before including the \c <assert.h> header file.  By default,
00053     only abort() will be called to halt the application.
00054 */
00055
00056 /*@{*/
00057
00058 /*
00059  * The ability to include this file (with or without NDEBUG) is a
00060  * feature.
00061  */
00062
00063 #undef assert
00064
00065 #if defined(__DOXYGEN__)
00066 /**
00067  * \def assert
00068  * \param expression Expression to test for.
00069  *
00070  * The assert() macro tests the given expression and if it is false,
00071  * the calling process is terminated.  A diagnostic message is written
00072  * to stderr and the function abort() is called, effectively
00073  * terminating the program.
00074  *
00075  * If expression is true, the assert() macro does nothing.
00076  *
00077  * The assert() macro may be removed at compile time by defining
00078  * NDEBUG as a macro (e.g., by using the compiler option -DNDEBUG).
00079  */
00080 #  define assert(expression)
00081
00082 #else /* !DOXYGEN */
00083
00084 #  if defined(NDEBUG)
00085 #    define assert(e)   ((void)0)
00086 #  else /* !NDEBUG */
00087 #    if defined(__ASSERT_USE_STDERR)
00088 #      define assert(e) ((e) ? (void)0 : \
00089                          __assert(__func__, __FILE__, __LINE__, #e))
00090 #    else /* !__ASSERT_USE_STDERR */
00091 #      define assert(e) ((e) ? (void)0 : abort())
00092 #    endif /* __ASSERT_USE_STDERR */
00093 #  endif /* NDEBUG */
00094 #endif /* DOXYGEN */
00095
00096 #ifdef __cplusplus
00097 extern "C" {
00098 #endif
00099
00100 #if !defined(__DOXYGEN__)
00101
00102 extern void __assert(const char *__func, const char *__file,
00103                      int __lineno, const char *__sexp);
00104
00105 #endif /* not __DOXYGEN__ */
00106
00107 #ifdef __cplusplus
00108 }
00109 #endif
00110
00111 /*@}*/
00112 /* EOF */


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