memdel - remove bytes from beginning of memory block

       Lars Wirzenius (lars.wirzenius@helsinki.fi)

Publib                                        C Programmer's Manual                                 MEMDEL(3pub)

memdel moves the contents of the block pointed to by p towards the beginning, n steps.  The values of the
       last n bytes of the block are indeterminate.

       p must not be a null pointer.  size and n may be zero.

       memdel - remove bytes from beginning of memory block

memdel returns its first argument.

publib(3), strdel(3)

       #include <publib.h>
       void *memdel(void *p, size_t size, size_t n);