Zip Extraction

Ooblik · Post by **Ooblik** » Sun May 17, 2009 2:20 pm

Anybody have a source code example on extracting zip files?

J.F. · Post by **J.F.** » Sun May 17, 2009 3:32 pm

It's the same as on a PC. Just use zlib - it's part of the libraries in the toolchain for a reason.
>.>

Post by **TyRaNiD** » Sun May 17, 2009 6:39 pm

Well you do need to but something around zlib which handles the zip format itself but yes not hard :)

willow :--) · Post by **willow :--)** » Sun May 17, 2009 10:08 pm

A working implementation exists in JGE++'s source code:
http://code.google.com/p/wagic/source/b ... /src/unzip
http://code.google.com/p/wagic/source/b ... System.cpp

But as it's been said, there's nothing PSPecific about this

coolkehon · Post by **coolkehon** » Mon May 18, 2009 1:18 am

i posted a library that was made using minizip that works on psp on my website kehon.izfree.com but not to sure how its doing now

Ooblik · Post by **Ooblik** » Tue May 19, 2009 6:32 pm

THANKS coolkehon your library still works perfectly!

Now I have a new problem:

Code: Select all

...		if&#40;unzGetCurrentFileInfo&#40;zipFd, &curZipFileInfo, fNameBuf, sizeof&#40;fNameBuf&#41;, NULL, 0, NULL, 0&#41; == UNZ_OK&#41; &#123;
			if&#40;curZipFileInfo.uncompressed_size > 0&#41; &#123;
				printf&#40;"Allocate %d Bytes for %s\n", &#40;int&#41;&#40;curZipFileInfo.uncompressed_size&#41;+1, fNameBuf&#41;;
				
				fileBuff = &#40;char *&#41;realloc&#40;fileBuff, curZipFileInfo.uncompressed_size+1&#41;;...

This only allocates 4 bytes (int ?). How can I fix it? Sorry I'm new to dynamic memory allocation XD

I know this is probably some stupid little thing I'm just not thinking of...

Torch · Post by **Torch** » Tue May 19, 2009 8:23 pm

Is fileBuff used before? Is it null? Check the realloc return value. If fileBuff isn't already assigned to an allocated address then it has to be null for realloc to work.

coolkehon · Post by **coolkehon** » Wed May 20, 2009 2:58 am

i did this once by accident it was a pointer problem dont rember if it was like this or what but i was writting a pointer instead of the data to the pointer or vice versa make sure you have all the info correct with pointers because the size of a pointer i believe is 4 bytes

Ooblik · Post by **Ooblik** » Wed May 20, 2009 11:17 am

coolkehon wrote:i did this once by accident it was a pointer problem dont rember if it was like this or what but i was writting a pointer instead of the data to the pointer or vice versa make sure you have all the info correct with pointers because the size of a pointer i believe is 4 bytes

Yeah its allocating the size of the pointer int (4 bytes) not the value of the pointer represented as an integer... if that makes sense...