Wanted: 7-zip API Guru

donho

The zip decompressor that Notepad++ is using for Plugins Admin has a quite critical bug. So Notepad++ needs a more reliable decompress component for that.

7zip could be a solution to the project, and it has great advantages because 1. it’s well tested. 2. it contains the better ratio compression algorithm which allow Notepad++ (plugin) community use 7z format.

I have check LZMA SDK in the official site here: https://www.7-zip.org/sdk.html
However I didn’t find the way/tutorial to integrate their source code into Notepad++. So if you have had 7zip integrate experience, please point me to a tutorial link or provide me a concrete example. Thank you.

rinku singh

https://sourceforge.net/projects/sevenzip/files/

Eko palypse

@donho

not a 7-zip API Guru but maybe this C++ wrapper is useful for you.

Eko

dinkumoil

@donho

I have created a Gist with a small demo program written in C++ (actually it’s very C-ish ;-) ). It uses the Windows Explorer OLE automation object for unzipping. It mimics the following VBScript code:

With CreateObject("Shell.Application")
  .Namespace("E:\Dst").CopyHere .Namespace("E:\Src\AZipFile.zip").Items, &H0614

  Do Until .Namespace("E:\Dst").Items.Count = .Namespace("E:\Src\AZipFile.zip").Items.Count
    WScript.Sleep 500
  Loop
End With

It’s 300 lines of code, comments and whitepace. I bet if you use 7Zip it will be not much less.

Please also read the comment under the Gist.

dinkumoil

@donho

Forgot to mention: The above script and, of course, the program from my Gist can extract recursively the whole content of a ZIP file, including all subfolders.

chcg

@donho See https://github.com/notepad-plus-plus/wingup/tree/master/src/ZipLib/extlibs/lzma. 7z is already there, but don’t know if this issues observed with ziplib are caused by the ziplib itself or the usage of it. At least the part from https://github.com/notepad-plus-plus/wingup/pull/8 I would see as user issue or as missing feature to unzip the complete content of a zip file by just one api call.
As already said at github I would avoid switching the file format from zip to 7z only without a real functional gain apart from some less Kbytes nowadays with high bandwidth internet access.

dinkumoil

@chcg said:

I would avoid switching the file format from zip to 7z only without a real functional gain apart from some less Kbytes nowadays with high bandwidth internet access.

I fully agree.

@donho

Please do not switch away from the ZIP format! That’s simply not necessary.

donho

@dinkumoil

I believe the unzip bug in WinGup has been fixed (no more zero length unzipped file) :
https://notepad-plus-plus.org/temp/GUP_new.zip

Could you confirm me if it’s fixed?

dinkumoil

@donho

The result of my tests is, that I didn’t find 0 byte files but a plugin package that could not be unzipped. The same ZIP file can be extracted with 7-ZIP and Windows Explorer without any problems.

dinkumoil

@donho

Unfortunately your last fix of Gup.exe didn’t help. Now we have other bugs. See the results of my test.

dinkumoil

@donho

Your latest fix did it! Thank you and happy holidays.