@node memmove, memory
@subheading Syntax

@example
#include <string.h>

void *memmove(void *dest, const void *source, int num);
@end example

@subheading Description

This function copies @var{num} bytes from @var{source} to @var{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. 

@subheading Return Value

@var{dest}

@subheading Portability

@portability ansi, posix

@subheading Example

@example
memmove(buf+1, buf, 99);
memmove(buf, buf+1, 99);
@end example