Re: [Chicken-users] map-file-to-memory and random access

[felix winkelmann]

On 4/14/07, Mark Voortman <address@hidden> wrote:
> Hello folks,
>
> I'm using map-file-to-memory to map a file in memory and then use
> move-memory! to read/write the contents. However, I was wondering if it is
> possible to random access the memory mapped file? For example, read/write
> only the bytes at position 5 to 10. If I use move-memory! it always starts
> reading/writing from byte 0.

Right now, the only solution that comes to mind is to use
"memory-mapped-file-pointer"
and do really dirty pointer arithmetic (see "pointer->address" and
"address->pointer").

Hm... "move-memory!" should probably get an additional argument giving
an offset.
What do you think?


cheers,
felix