On Tue, Feb 8, 2011 at 11:13 AM, C K Kashyap <ckkash...@gmail.com> wrote: > > > On Tue, Feb 8, 2011 at 2:26 PM, Michael Snoyman <mich...@snoyman.com> wrote: >> >> Your array contains machine-sized Ints, which in practice are likely >> either 32-bit or 64-bit, while a ByteString is the equivalent of an >> array or 8-bit values. So you'll need to somehow convert the Ints to >> Word8s. Do you know if you need big or little endian? >> >> A basic approach would be: >> >> * Use freeze to convert your IOArray into an IArray >> * Use putIArrayOf and put (from cereal) to generate a Putter value >> * Use runPut to generate a ByteString from that >> > > Thanks Michael, > Actually, I need an array of 8-bit words - Is that available? > Also, would be hard to do it without cereal? > Regards, > Kashyap
1) Just use Data.Word.Word8 instead of the second Int in your type sig for IOArray 2) Use getElems to get a [Word8] 3) Data.ByteString.pack converts a [Word8] into a ByteString Michael _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
