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authorDavid Kalnischkies <david@kalnischkies.de>2015-12-23 16:42:12 +0100
committerDavid Kalnischkies <david@kalnischkies.de>2015-12-23 16:42:12 +0100
commitf63123c385738b059cd854b694a0f62558fb8cbe (patch)
tree735022972359476a575b8d2e40937da6504b62ba /cmdline/apt-cache.cc
parent7a68effcb904b4424b54a30e448b6f2560cd1078 (diff)
implement a buffer system for FileFd::ReadLine
The default implementation of ReadLine was very naive by just reading each character one-by-one. That is kinda okay for libraries implementing compression as they have internal buffers (but still not great), but while working with files directly or via a pipe as there is no buffer there so all those reads are in fact system calls. This commit introduces an internal buffer in the FileFd implementation which is only used by ReadLine. The more low-level Read and all other actions remain unbuffered – they just changed to deal with potential "left-overs" in the buffer correctly. Closes: 808579
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