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2008-06-01Fix a buffer overflow in the LZMA encoder. It was due to myLasse Collin1-12/+47
misunderstanding of the code. There's no tiny fix for this problem, so I also cleaned up the code in general. This reduces the speed of the encoder 2-5 % in the fastest compression mode ("lzma -1"). High compression modes should have no noticeable performance difference. This commit breaks things (especially LZMA_SYNC_FLUSH) but I will fix them once the new format and LZMA2 has been roughly implemented. Plain LZMA won't support LZMA_SYNC_FLUSH at all and won't be supported in the new .lzma format. This may change still but this is what it looks like now. Support for known uncompressed size (that is, LZMA or LZMA2 without EOPM) is likely to go away. This means there will be API changes.
2008-03-22Demystified the "state" variable in LZMA code. Use theLasse Collin1-17/+17
word literal instead of char for better consistency. There are still some names with _char instead of _literal in lzma_optimum, these may be changed later. Renamed length coder variables. This commit doesn't change the program logic.
2008-01-15Revised the fastpos code. It now uses the slightly fasterLasse Collin1-0/+1
table-based version from LZMA SDK 4.57. This should be fast on most systems. A simpler and smaller alternative version is also provided. On some CPUs this can be even a little faster than the default table-based version (see comments in fastpos.h), but on most systems the table-based code is faster.
2008-01-15Convert bittree_get_price() and bittree_reverse_get_price()Lasse Collin1-10/+6
from macros to inline functions.
2007-12-09Imported to git.Lasse Collin1-0/+893