On Sat, Dec 04, 2004 at 05:42:30PM -0600, John Goerzen wrote:
Hello,
I'm pleased to announce the release of MissingH 0.7.2, available from http://quux.org/devel/missingh.
This release incorporates Ian Lynagh's pure-Haskell Inflate algorithm, and CRC-32 and GZip file parsers of my own design, to make a pure-Haskell solution[1] to decompressing .gz files. At present, it is rather slow, as there has been little effort to optimize any of the three components. Patches to address the speed will be happily applied. The Inflate and CRC32 algorithms also provide the necessary support to be able to handle ZIP files. I plan to introduce ZIP and tar file support in upcoming releases of MissingH.
The FileArchive.GZip module is interesting, but I'm not sure I care for the interface. Wouldn't it be better for decompress :: String -> (String, Maybe GZipError) to be decompress :: [Word8] -> Either GZipError [Word8] And I'm not sure how hDecompress works. Could we use this with a pipe to read a gzipped file, or does it have to be able to synchronously write the entire file to the output handle? What I'd really like would be openGZippedFile :: IOMode -> FilePath -> IO Handle And of course, speed is an issue, so an optional zlib backend would be double-nice (or a really well-optimized decompressor). For now, I guess I'll stick with my tried and true (and butt ugly) zlib ffi interface, which uses threads and pipes to implement a gzOpenFile. Actually, I see that compression is not implemented either... -- David Roundy http://www.darcs.net