PureBasic Forums - English

Hello everyone,

I'm trying to use z-lib decompression functions from my PB app but i've got problems figuring out how to correctly call the functions contained in zlib.dll.
My problem is that i need to pass a zstream object as a parameter to the zlib inflate() function. How could this zstream object (which is defined inside the zlib.dll) be translated into PB ?
If anyone has an example of calling zlib functions from a PB app, it would really be useful .

Thanks in advance,

Pythagoras

PS : I've looked at the PBZip library and other way of compression/decompression, but they doesn't suit my need as i'm trying to read inside a single packed file which contain g-zip compressed files.

Check out the PB ZIP library !

It's supports all zip stuff easly... It's in the Annoucements link

Thanks for your reply but i've already looked at the PBZip library which is great but doesn't really suit my needs as i'm reading from a big data file which isn't a canonical zip file. This means i can only work with memory buffers that i fill by reading inside the data file. Correct me if i'm wrong but the PBzip functions don't seem to allow me to decompress from a memory buffer but only from a file.
As I want to do it, i need first to retrieve the compressed data for a certain file at a certain offset, store it in a buffer and decompress from that buffer to another one which i can then use.
I can use the PBzip lib with a hack but it requires to first extract the compressed data from the data file, write it into a temporary file and decompress that file with PBzip into a data buffer. I'm afraid this might be too slow so that's why i want to use z-lib which can decompress data from a memory buffer.

Or maybe i got it all wrong and there's an easier way ?

pythagoras