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author | mm <mm@FreeBSD.org> | 2010-05-10 06:59:50 +0000 |
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committer | mm <mm@FreeBSD.org> | 2010-05-10 06:59:50 +0000 |
commit | 5c358d45429b654efa9c8177ecd370a7965ec1a7 (patch) | |
tree | d2d916954c6a66a3168ee356b5f24da01c2017d6 /contrib/xz/TODO | |
parent | 3e09decd1986826f54af1a47be97bb87c1220783 (diff) | |
parent | 1008b7c6744a190c5b15aaf8cab1054671e4c7c3 (diff) | |
download | FreeBSD-src-5c358d45429b654efa9c8177ecd370a7965ec1a7.zip FreeBSD-src-5c358d45429b654efa9c8177ecd370a7965ec1a7.tar.gz |
Import of liblzma, xz, xzdec, lzmainfo from vendor branch
Add support for xz and lzma to lesspipe.sh (xzless, lzless)
Bump __FreeBSD_version
Approved by: delphij (mentor)
MFC after: 2 weeks
Diffstat (limited to 'contrib/xz/TODO')
-rw-r--r-- | contrib/xz/TODO | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/contrib/xz/TODO b/contrib/xz/TODO new file mode 100644 index 0000000..9fac1b3 --- /dev/null +++ b/contrib/xz/TODO @@ -0,0 +1,60 @@ + +XZ Utils To-Do List +=================== + +Known bugs +---------- + + The test suite is too incomplete. + + If the memory usage limit is less than about 13 MiB, xz is unable to + automatically scale down the compression settings enough even though + it would be possible by switching from BT2/BT3/BT4 match finder to + HC3/HC4. + + The code to detect number of CPU cores doesn't count hyperthreading + as multiple cores. In context of xz, it probably should. + Hyperthreading is good at least with p7zip. + + XZ Utils compress some files significantly worse than LZMA Utils. + This is due to faster compression presets used by XZ Utils, and + can be worked around by using "xz --extreme". However, the presets + need some tweaking and maybe this issue can be minimized without + making the typical case too much slower. + + xz doesn't quote unprintable characters when it displays file names + given on the command line. + + tuklib_exit() doesn't block signals => EINTR is possible. + + +Missing features +---------------- + + xz doesn't support copying extended attributes, access control + lists etc. from source to target file. + + Multithreaded compression + + Multithreaded decompression + + Buffer-to-buffer coding could use less RAM (especially when + decompressing LZMA1 or LZMA2). + + I/O library is not implemented. It will possibly be named libzzf. + + lzma_strerror() to convert lzma_ret to human readable form? + This is tricky, because the same error codes are used with + slightly different meanings. + + +Documentation +------------- + + Some tutorial is needed for liblzma. I have planned to write some + extremely well commented example programs, which would work as + a tutorial. I suppose the Doxygen tags are quite OK as a quick + reference once one is familiar with the liblzma API. + + Document the LZMA1 and LZMA2 algorithms. + |