yacreader/compressed_archive/libarchive/README.md
2022-08-31 09:32:23 +02:00

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# libarchive Decompression Backend
This backend utilizes the [libarchive](https://www.libarchive.org/) library to support a wide
variety of compression formats.
This backend is currently only supported on the Linux platform.
## Using
Enabling this backend is achieved by adding the `libarchive` qmake configuration value:
qmake CONFIG+=libarchive
Upon success, the application can be built as normal.
## Limitations
* libarchive has a stream-based architecture that does not (currently) offer random access.
In practice, this means that you can only seek forward and would have to re-open an archive
to read an entry before the current position. This doesn't seem to have a huge performance
hit and can be mitigated by creating properly sorted archives.
* 7z decompression is slow (but seems to be slightly faster than unarr)