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memmove
=======

Syntax
------

     #include <string.h>
     
     void *memmove(void *dest, const void *source, int num);

Description
-----------

This function copies NUM bytes from SOURCE to DEST.  The copy is done
in such a way that if the two regions overlap, the source is always
read before that byte is changed by writing to the destination.

Return Value
------------

DEST

Example
-------

     memmove(buf+1, buf, 99);
     memmove(buf, buf+1, 99);