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Dataflow - NULL pointers REFERENCE - ISO:C90-6.2.2.3 Pointers

Pointer arithmetic is being performed on a null pointer constant.

Internal representation of a null pointer constant is implementation-defined and may not necessarily be bitwise 0. A null pointer constant may be assigned or compared, but any attempt to perform arithmetic operations on it should be viewed as suspicious and non-portable.

For example: 


/*PRQA S 489,2017,3199,3203,3408 ++*/

#define NULL (void *)0

extern void foo(void)
{
    int *p;

    p = (int *)(NULL) + 1 ;            /* Message 0507 */
}

No MISRA C:2012 Rules applicable to message 0507

See also:

QA·C Source Code Analyser 8.1
MISRA C:2012 Compliance Module 1.0
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