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2008-09-02Some fixes to LZ encoder.Lasse Collin3-75/+94
2008-08-28Sort of garbage collection commit. :-| Many things are stillLasse Collin20-1846/+1865
broken. API has changed a lot and it will still change a little more here and there. The command line tool doesn't have all the required changes to reflect the API changes, so it's easy to get "internal error" or trigger assertions.
2008-06-18Update the code to mostly match the new simpler file formatLasse Collin2-6/+10
specification. Simplify things by removing most of the support for known uncompressed size in most places. There are some miscellaneous changes here and there too. The API of liblzma has got many changes and still some more will be done soon. While most of the code has been updated, some things are not fixed (the command line tool will choke with invalid filter chain, if nothing else). Subblock filter is somewhat broken for now. It will be updated once the encoded format of the Subblock filter has been decided.
2008-06-01Fix a buffer overflow in the LZMA encoder. It was due to myLasse Collin2-124/+7
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.
2008-04-25Prevent LZ encoder from hanging with known uncompressedlarhzu/v4.999.3alphaLasse Collin1-2/+7
size. The "fix" breaks LZMA_SYNC_FLUSH at end of stream with known uncompressed size, but since it currently seems likely that support for encoding with known uncompressed size will go away anyway, I'm not fixing this problem now.
2008-04-24Fix wrong return type (uint32_t -> bool).Lasse Collin2-2/+2
2008-04-24Fix data corruption in LZ encoder with LZMA_SYNC_FLUSH.Lasse Collin3-5/+38
2008-03-11Initialize the last byte of the dictionary to zero so thatLasse Collin1-0/+1
lz_get_byte(lz, 0) returns zero. This was broken by 1a3b21859818e4d8e89a1da99699233c1bfd197d.
2008-03-10Always initialize lz->temp_size in lz_decoder.c. temp_size didLasse Collin1-5/+6
get initialized as a side-effect after allocating a new decoder, but not when the decoder was reused.
2008-02-02Don't memzero() the history buffer when initializing LZLasse Collin1-4/+3
decoder. There's no danger of information leak here, so it isn't required. Doing memzero() takes a lot of time with large dictionaries, which could make it easier to construct DoS attack to consume too much CPU time.
2008-01-18Fix LZMA_SYNC_FLUSH handling in LZ and LZMA encoders.Lasse Collin2-8/+27
That code is now almost completely in LZ coder, where it can be shared with other LZ77-based algorithms in future.
2008-01-14Major changes to LZ encoder, LZMA encoder, and range encoder.Lasse Collin2-25/+130
These changes implement support for LZMA_SYNC_FLUSH in LZMA encoder, and move the temporary buffer needed by range encoder from lzma_range_encoder structure to lzma_lz_encoder.
2008-01-14Don't use coder->lz.stream_end_was_reached in assertionsLasse Collin1-2/+0
in match_c.h.
2008-01-10Eliminate lzma_lz_encoder.must_move_pos. It's neededLasse Collin2-8/+2
only in one place which isn't performance criticial.
2007-12-09Imported to git.Lasse Collin18-0/+2193
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 18:34:38 +0000