Maybe it is a stupid question but I need yours help.
As in the topic. I have a Gzip archive in the buffer and I need to extract
these archive into another buffer.

I tried: void[] _uncompressed = uncompress(_compressed);

but it throws 'std.zlib.ZlibException: data error.'

Is it possible to do with Phobos2 ? The archive is not corrupted because It works fine after saving on the disk.

Thanks in advance.

On 12/11/2010 23:33, Zarathustra wrote:
> Maybe it is a stupid question but I need yours help.
> As in the topic. I have a Gzip archive in the buffer and I need to extract
> these archive into another buffer.
>
> I tried: void[] _uncompressed = uncompress(_compressed);
>
> but it throws 'std.zlib.ZlibException: data error.'
>
> Is it possible to do with Phobos2 ? The archive is not corrupted because It
> works fine after saving on the disk.
>
> Thanks in advance.

A Gzipp'd file will start with a Gzip header and the uncompress function (probably) expects to be given a pointer the first byte of the compressed data, i.e. not a pointer to the header.

You probably just need to add an offset == to the size of the gzip header to the start of your data.

There's a full interface to zlib available in phobo\etc\c\zlib.d. so have a look through there.

-- 
My enormous talent is exceeded only by my outrageous laziness.
http://www.ssTk.co.uk

Thanks for a tip, but it's still does not work.
My test gzip file have 10 (minimum gzip header) header bytes and 8 trailing bytes,
so I tried:
auto _uncompressed = uncompress(_compressed[0x0A.._compressed.length - 0x08]);

But the exception still occurs. Maybe the compressed data need to be aligned in
some boundary or something.
Please for help.

Ok, I found the solution:

_uncompressed = uncompress(_compressed,
*cast(uint*)&_compressed[_compressed.length-4], 30);