Review Request 125974: Make KTar KCompressionDevice-friendly

[Romário Rios]

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https://git.reviewboard.kde.org/r/125974/
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Review request for KDE Frameworks and Aleix Pol Gonzalez.


Repository: karchive


Description
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Up until now, since at least 5.12, decompressing some data coming directly from a QIODevice by using KCompressionDevice because this is a sequential device, and KTar and KArchive used to use QIODevice::seek and pos and some places, which made the decompression fail. This patch makes KTar sequential-friendly by replacing the calls to seek and pos with read and a simple counter, respectively.


Diffs
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  src/karchive.cpp 0ece37c 
  src/ktar.cpp 824395e 

Diff: https://git.reviewboard.kde.org/r/125974/diff/


Testing
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Makes the tests from review #125941 pass


Thanks,

Romário Rios

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