QuaZip - Undefined Reference
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@FluentCoding said in QuaZip - Undefined Reference:
QuaZip
Hi
Did you compile all of QuaZip yourself so we know the compiler used for app and for lib is the same and therefore compatible?
OR did you download a precompiled lib and try to link to that ?Often undefined reference comes down to
32/64 bit mismatch
compiler mismatch
It simply don't find itYou do have zlib installed in a normal system place for your platform ?
@mrjj https://github.com/stachenov/quazip I've downloaded the source and just included it to the project. I also tried to build it but I got some errors. I also have installed zlib but it didn't work, I've uninstalled it. I then added the line
LIBS += -lzso that QT's internal zlib library gets added but that didn't work either.@Bonnie I have already tried it and it didn't work either. It also didn't remove the dllimport warnings.
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@mrjj https://github.com/stachenov/quazip I've downloaded the source and just included it to the project. I also tried to build it but I got some errors. I also have installed zlib but it didn't work, I've uninstalled it. I then added the line
LIBS += -lzso that QT's internal zlib library gets added but that didn't work either.@Bonnie I have already tried it and it didn't work either. It also didn't remove the dllimport warnings.
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Windows or linux ?
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@mrjj Win10
@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 ?
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@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 ?
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@mrjj From their homepage (the *.msi installer)
@FluentCoding
https://zlib.net/ ?
and then some of external links ?I wondering if its for older compiler if not source code.
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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.
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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.
@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. -
@mrjj Thats perfect, thanks! I only need it for zip iirc.
@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.
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@FluentCoding said in QuaZip - Undefined Reference:
Btw is it possible to open a zip file from a QByteArray (from memory generally)?
yes
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@FluentCoding said in QuaZip - Undefined Reference:
Btw is it possible to open a zip file from a QByteArray (from memory generally)?
yes
@Christian-Ehrlicher How, if I may ask? I haven't found the appropiate method for that.
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Oh aight. Btw is it possible to open a zip file from a QByteArray (from memory generally)? @mrjj
@FluentCoding
Hi
Yes it can be both memory and file-based
see section
Extract a zip entry into memory using callback. -
This post is deleted!
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@FluentCoding
Hi
Yes it can be both memory and file-based
see section
Extract a zip entry into memory using callback. -
@mrjj Thanks but I meant from memory, not into memory.
@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); -
@mrjj Alright - (hopefully the) last question: How can I create zip_t object without
zip_open, so that i only usezip_entry_writeto add the buffer? Should I just create an object of the structzip_t? Also, should I replacefileSize32Bitwith the size of the QByteArray? -
@mrjj Alright - (hopefully the) last question: How can I create zip_t object without
zip_open, so that i only usezip_entry_writeto add the buffer? Should I just create an object of the structzip_t? Also, should I replacefileSize32Bitwith the size of the QByteArray?Hi
I have not tried that but look in zip.c andstruct 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.
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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.
