[gambit-list] Fast conversion of vectors?

Christian Jaeger christian at pflanze.mine.nu
Sun Jan 18 16:35:00 EST 2009

Petter Egesund wrote:
> Hi, I wonder:
> Is there a way to "cast" a u32vector to a u8vector (except for
> creating a new one and writing to this)?
> The reason I would like to do this is that u8vectors seems to be the
> fastest way to write to disk; read-subu8vector and write-subu8vector.



Of course the byte order in the file will be cpu endianness dependent.

Re-tagging vectors to be of different type is also possible using
lowlevel ops, but why not go with the above.

> I could off course do this in C using the FFI, but I am not sure if
> the garbage-collector might suprise me if I tried this?

Currently not for the time span during which you don't leave C. Be
prepared for possible changes with future Gambit versions then, though.

> Is there a canonical way?

Currently the only canonical way would be to use the ffi with buffers
allocated in C.


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