xz.git - XZ Utils

Age	Commit message (Collapse)	Author	Files	Lines
2008-06-01	Fix a buffer overflow in the LZMA encoder. It was due to my	Lasse Collin	2	-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.
2008-04-25	Prevent LZ encoder from hanging with known uncompressedlarhzu/v4.999.3alpha	Lasse Collin	1	-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.
2008-04-24	Fix wrong return type (uint32_t -> bool).	Lasse Collin	2	-2/+2

2008-04-24	Fix data corruption in LZ encoder with LZMA_SYNC_FLUSH.	Lasse Collin	3	-5/+38

2008-03-11	Initialize the last byte of the dictionary to zero so that	Lasse Collin	1	-0/+1
	lz_get_byte(lz, 0) returns zero. This was broken by 1a3b21859818e4d8e89a1da99699233c1bfd197d.
2008-03-10	Always initialize lz->temp_size in lz_decoder.c. temp_size did	Lasse Collin	1	-5/+6
	get initialized as a side-effect after allocating a new decoder, but not when the decoder was reused.
2008-02-02	Don't memzero() the history buffer when initializing LZ	Lasse Collin	1	-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.
2008-01-18	Fix LZMA_SYNC_FLUSH handling in LZ and LZMA encoders.	Lasse Collin	2	-8/+27
	That code is now almost completely in LZ coder, where it can be shared with other LZ77-based algorithms in future.
2008-01-14	Major changes to LZ encoder, LZMA encoder, and range encoder.	Lasse Collin	2	-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.
2008-01-14	Don't use coder->lz.stream_end_was_reached in assertions	Lasse Collin	1	-2/+0
	in match_c.h.
2008-01-10	Eliminate lzma_lz_encoder.must_move_pos. It's needed	Lasse Collin	2	-8/+2
	only in one place which isn't performance criticial.
2007-12-09	Imported to git.	Lasse Collin	18	-0/+2193