QA·C Help - 2776

	2776	Definite: Copy between overlapping objects.

Pointers

A definite condition has been detected. A standard library function such as 'memcpy' or 'strncpy' is being used to copy data between two objects which overlap in memory. The behavior will be undefined. It may be advisable to use the function 'memmove' instead.

For example:


/*PRQA S 315,702,1253,2017,3120,3132,3408,3447,3625 ++ */
#include <string.h>

extern char buf1[10];


extern void f2776(void)
{
    char * p1;
    char * p2;

    p1 = buf1;
    p2 = &buf1[3];

    (void)memcpy (p1, p2, 5);      /* 2776 */
    (void)memmove(p1, p2, 5);      /*      */
}

See also:

2777 Apparent: Copy between overlapping objects.
2778 Suspicious: Copy between overlapping objects.

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