wxZipInputStream will not parse zip files greater than 2GB

kittymaguire · Post by **kittymaguire** » Wed May 20, 2009 1:33 pm

My application uses wzZipInputStream to extract the files from a zip file. This works fine for files below 2GB but for large files GetNextEntry returns null.

I am using 2.8.4 on Windows.

TrV · Post by **TrV** » Wed May 20, 2009 6:23 pm

Just a hint : what is your file system ?
FAT32 has a 2GB file limit.

Frank · Post by **Frank** » Thu May 21, 2009 8:11 am

As has the ZIP-Format.

kittymaguire · Post by **kittymaguire** » Fri May 22, 2009 6:28 am

Frank wrote:As has the ZIP-Format.

I believe that zip format now has a limit of 4GB, as 7-zip can extract the files contained in the zip file.

kittymaguire · Post by **kittymaguire** » Fri May 22, 2009 6:31 am

TrV wrote:Just a hint : what is your file system ?
FAT32 has a 2GB file limit.

It failed on Windows XP and Vista machines running NTFS

Frank · Post by **Frank** » Fri May 22, 2009 12:40 pm

kittymaguire wrote:
Frank wrote:As has the ZIP-Format.
I believe that zip format now has a limit of 4GB, as 7-zip can extract the files contained in the zip file.

Yeah, but that's an extension. The orginal ZIP-Spec uses a signed integer.

So my guess would be that wx implemented it's Zip-Routines from the original Zip-Docs.