Editing memmove - FilterMeisterWiki

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= memmove =

== Syntax ==
{{void *memmove(void *dest, void *src, int n);}}

== Arguments ==
:'''dest'''
::The memory block to copy data to
:'''src'''
::The memory block that data will be copied from
:'''n'''
::The number of bytes to be copied

== Return ==
Returns a pointer to the destination ('''dest''') memory block.

== Description ==
Despite the name, memmove copies data from one block of memory to another, up to the number of bytes given.  If the memory blocks you are trying to copy overlap, it is better to use memmove instead of ((memcpy)), as memmove uses a temporary buffer during the copy.

== Comment ==
Be careful not to cause buffer overruns by copying more data into the destination memory block than it can hold.

== Example ==
<code>
// Allocate memory for the strings
char *dest = calloc(10, 1);
char *src = calloc(10, 1);

// Store initial string values
strcpy(dest, "oldstring");
strcpy(src, "newstring");

// Show before and after memmove
Info("Before memmove: dest = %s, src = %s", dest, src);
memmove(dest, src, 3);
Info("After memmove: dest = %s, src = %s", dest, src);
</code>

== See Also ==
((memcpy)), ((strcpy)), ((strncpy))

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