[Feature Request]: Exception too long path

[anywhereyang]

Feature description

23.7z has one file: safasfffasfafasafasfffasfafasafasfffasfafasafasfffasfafasafasfffasfafasafasfffasfafasafasfffasfafasafasfffasfafasafasfffasfafasafasfffasfafasafasfffasfafasafasfffasfafasafasfffasfafasafasfffasfafasafasfffasfafasafa.txt

and the code will exception:

void Test() { try { bit7z::Bit7zLibrary lib{ L"7z.dll" }; bit7z::BitExtractor extractor{ lib, bit7z::BitFormat::SevenZip }; extractor.extract(LR"(D:\Code\Game\Cef109\Bin\temp\23.7z)", LR"(D:\Code\Game\Cef109\Bin\temp\saddfsddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd)"); } catch (const bit7z::BitException& e) { MessageBoxA(0,e.what(), "error", 0); int c = 0; } }

Additional context

No response

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[rikyoz]

Hi! You can build and use bit7z with the BIT7Z_AUTO_PREFIX_LONG_PATHS option enabled to make the library correctly handle long paths on Windows. It should fix your issue!

[anywhereyang]

i downlaod bit7z-3.2.0.zip,and search 'BIT7Z_AUTO_PREFIX_LONG_PATHS' in the source files ,but not found,,how to use ?

[rikyoz]

Sorry, I thought you were using the latest v4 release candidate, which introduced the BIT7Z_AUTO_PREFIX_LONG_PATHS option. Unfortunately, the v3.2 doesn't support such an option. When dealing with long paths, one possible workaround is to prepend the string \\?\ (\\\\?\\ escaped) to every path string you use (https://learn.microsoft.com/en-us/windows/win32/fileio/maximum-file-path-limitation?tabs=registry). E.g.:

extractor.extract(LR"(\\?\D:\Code\Game\Cef109\Bin\temp\23.7z)", LR"(\\?\D:\Code\Game\Cef109\Bin\temp\saddfsddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd)");

[anywhereyang]

ok,thanks

[rikyoz]

You're welcome!