QuaZip - Undefined Reference

FluentCoding

mrjj

@FluentCoding
Ok did you see
"Also note that you may or may not need to define ZLIB_WINAPI (qmake DEFINES+=ZLIB_WINAPI) when linking to zlib on Windows, depending on how zlib was built (generally, if using zlibwapi.dll, this define is needed)."

From where did you install zlib ?

FluentCoding

@mrjj From their homepage (the *.msi installer)

mrjj

@FluentCoding
https://zlib.net/ ?
and then some of external links ?

I wondering if its for older compiler if not source code.

FluentCoding

No, don't think so. Have you ever worked with QuaZip? Or are you aware of any good alternative? I was unlucky with KArchive too.

mrjj

@FluentCoding
I only seen it here on forums. I compiled it once in linux but not tried on
Windows hence my questions to see what zlib you used.
if binary, i think its a compiler mismatch issue you are seeing.

I used
https://github.com/kuba--/zip
which is very small and easy to use/compile but
only support zip files.
But for my use case it was ok and speed and compression is super.

FluentCoding

@mrjj Thats perfect, thanks! I only need it for zip iirc.

mrjj

@FluentCoding
Ok :)
Do note.

It has no recursive function to add all files in all folders but using Qt that is not hard to add.

I tested it with a 1 GB zip file which it handled ok. I cannot say for larger.

It does not support 64 bit zip file so if you get yours from an external source it might be an issue.

FluentCoding

Oh aight. Btw is it possible to open a zip file from a QByteArray (from memory generally)? @mrjj

Christian Ehrlicher

@FluentCoding said in QuaZip - Undefined Reference:

Btw is it possible to open a zip file from a QByteArray (from memory generally)?

yes

FluentCoding

@Christian-Ehrlicher How, if I may ask? I haven't found the appropiate method for that.

mrjj

@FluentCoding
Hi
Yes it can be both memory and file-based
see section
Extract a zip entry into memory using callback.

FluentCoding

This post is deleted!

FluentCoding

@mrjj Thanks but I meant from memory, not into memory.

mrjj

@FluentCoding
if you mean
Can i add a buffer to the zip file as was it a file then yes :)

                auto bytes = QByteArray::fromRawData(reinterpret_cast<const char *>(memory), int(fileSize32Bit));
                zip_entry_write(zip, bytes, fileSize32Bit);

FluentCoding

@mrjj Alright - (hopefully the) last question: How can I create zip_t object without zip_open, so that i only use zip_entry_write to add the buffer? Should I just create an object of the struct zip_t? Also, should I replace fileSize32Bit with the size of the QByteArray?

mrjj

Hi
I have not tried that but look in zip.c and

struct zip_t *zip_open(const char *zipname, int level, char mode) {

I think you can init it up as you like if you follow that code and the various modes + flags.

Yes, fileSize32Bit should be the QByteArray size.

FluentCoding

Alright, but I think that I'll try another framework :/ It seems that I can run into problems - im neither sure if the zip files i wanna extract are 32 bit and maybe, I would need to extract a .rar or .7z later. I will give Zipper a try. But thank you very much for your support, @mrjj.

mrjj

@FluentCoding
Hi
Ok. Please post if you find something good that is easy to compile on windows.
Also, could you pos the link for the zlib you used ?
I cannot find any MSI and Im still abit hooked on QuaZip :)

FluentCoding

Sure, @mrjj.

http://gnuwin32.sourceforge.net/packages/zlib.htm

This is the official download page. If you search good enough on the zlib homepage, you'll see that you have to download the binaries from this page.