Fb_Memmove

Copies a block of memory from a location to another

Syntax
   Declare Function fb_memmove cdecl ( ByRef dst As Any, ByRef src As Any, 
   ByVal bytes As UInteger ) As Any Ptr

Usage
   [result =] fb_memmove( dst, src, bytes )

Parameters
   dst
      starting address of destination memory
   src
      starting address of source memory
   bytes
      number of bytes to copy

Return Value
   The starting address of destination memory is returned.

Description
   fb_memmove copies a given number of bytes from the memory location src 
   to the memory location dst. Each starting address is taken from a 
   reference to a variable or array element.
   Copying takes place as if an intermediate buffer were used, allowing the 
   destination and source areas to overlap in any way (safer approach, and 
   for any platform). Using Fb_Memcopy is sufficient (and may induce 
   greater speed) when the memory areas do not overlap.
   To avoid overflows, the valid memory areas pointed to by both src and 
   dst must be at least equal in size to the number of bytes to be copied.

   The underlying type of the objects pointed to by both the source and 
   destination pointers are irrelevant for this function.
   The function does not check for any terminating null character in the 
   source area. It always copies exactly the given number of bytes.
   The result is a binary copy of the data.

   Note: In order to copy from/to memory referenced by a Pointer, it must 
   be dereferenced first (or else specify in argument term the ByVal 
   keyword in front of the pointer name). Otherwise, fb_memmove will try to 
   copy the bytes from/to the pointer variable's memory location.

Example
   Dim As ZString * 33 z = "memmove can be very useful......"

   Print z

   fb_memmove(z[20], z[15], 11)

   Print z

   Sleep
      
Output:

   memmove can be very useful......
   memmove can be very very useful.
   		

Version
   * Since fbc 1.08.0

Differences from QB
   * The behavior and usage is new to FreeBASIC.

See also
   * Fb_Memcopy
   * fb_MemCopyClear

