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2010-09-26Fix the preset -3e.Lasse Collin1-0/+1
depth=0 was missing.
2010-09-04Don't set lc=4 with --extreme.Lasse Collin1-1/+0
This should reduce the cases where --extreme makes compression worse. On the other hand, some other files may now benefit slightly less from --extreme.
2010-09-03Tweak the compression presets -0 .. -5.Lasse Collin1-10/+19
"Extreme" mode might need some further tweaking still. Docs were not updated yet.
2010-05-26Rename MIN() and MAX() to my_min() and my_max().Lasse Collin3-9/+9
This should avoid some minor portability issues.
2010-02-12Collection of language fixes to comments and docs.Lasse Collin6-7/+7
Thanks to Jonathan Nieder.
2009-11-22Make fastpos.h use tuklib_integer.h instead of bsr.hLasse Collin1-4/+1
when --enable-small has been specified.
2009-11-15Fix wrong indentation caused by incorrect settingsLasse Collin2-4/+4
in the text editor.
2009-11-14Fix a design error in liblzma API.Lasse Collin2-26/+34
Originally the idea was that using LZMA_FULL_FLUSH with Stream encoder would read the filter chain from the same array that was used to intialize the Stream encoder. Since most apps wouldn't use LZMA_FULL_FLUSH, most apps wouldn't need to keep the filter chain available after initializing the Stream encoder. However, due to my mistake, it actually required keeping the array always available. Since setting the new filter chain via the array used at initialization time is not a nice way to do it for a couple of reasons, this commit ditches it and introduces lzma_filters_update(). This new function replaces also the "persistent" flag used by LZMA2 (and to-be-designed Subblock filter), which was also an ugly thing to do. Thanks to Alexey Tourbin for reminding me about the problem that Stream encoder used to require keeping the filter chain allocated.
2009-10-04Use a tuklib module for integer handling.Lasse Collin3-3/+3
This replaces bswap.h and integer.h. The tuklib module uses <byteswap.h> on GNU, <sys/endian.h> on *BSDs and <sys/byteorder.h> on Solaris, which may contain optimized code like inline assembly.
2009-09-11Fix a couple of warnings.Lasse Collin2-5/+5
2009-06-30Build system fixesLasse Collin2-51/+43
Don't use libtool convenience libraries to avoid recently discovered long-standing subtle but somewhat severe bugs in libtool (at least 1.5.22 and 2.2.6 are affected). It was found when porting XZ Utils to Windows <http://lists.gnu.org/archive/html/libtool/2009-06/msg00070.html> but the problem is significant also e.g. on GNU/Linux. Unless --disable-shared is passed to configure, static library built from a set of convenience libraries will contain PIC objects. That is, while libtool builds non-PIC objects too, only PIC objects will be used from the convenience libraries. On 32-bit x86 (tested on mobile XP2400+), using PIC instead of non-PIC makes the decompressor 10 % slower with the default CFLAGS. So while xz was linked against static liblzma by default, it got the slower PIC objects unless --disable-shared was used. I tend develop and benchmark with --disable-shared due to faster build time, so I hadn't noticed the problem in benchmarks earlier. This commit also adds support for building Windows resources into liblzma and executables.
2009-06-26Fix @variables@ to $(variables) in Makefile.am files.Lasse Collin1-4/+4
Fix the ordering of libgnu.a and LTLIBINTL on the linker command line and added missing LTLIBINTL to tests/Makefile.am.
2009-04-13Put the interesting parts of XZ Utils into the public domain.Lasse Collin16-184/+72
Some minor documentation cleanups were made at the same time.
2009-02-02Modify LZMA_API macro so that it works on Windows withLasse Collin2-2/+2
other compilers than MinGW. This may hurt readability of the API headers slightly, but I don't know any better way to do this.
2009-01-27Added initial support for preset dictionary for raw LZMA1Lasse Collin5-14/+28
and LZMA2. It is not supported by the .xz format or the xz command line tool yet.
2009-01-19Move some LZMA2 constants to lzma2_encoder.h so that theyLasse Collin3-14/+16
can be used outside lzma2_encoder.c.
2009-01-19Remove dead code.Lasse Collin1-8/+0
2008-12-27Revert a change made in 3b34851de1eaf358cf9268922fa0eeed8278d680Lasse Collin1-15/+8
that was related to LZMA_MODE_FAST. The original code is slightly faster although it compresses slightly worse. But since it is fast mode, it is better to select the faster version.
2008-12-27Bunch of liblzma tweaks, including some API changes.Lasse Collin2-38/+17
The API and ABI should now be very close to stable, although the code behind it isn't yet.
2008-12-15Bunch of liblzma API cleanups and fixes.Lasse Collin1-3/+3
2008-12-15Fix data corruption in LZMA2 decoder.Lasse Collin1-4/+11
2008-12-09Make the memusage functions of LZMA1 and LZMA2 encodersLasse Collin3-16/+35
to validate the filter options. Add missing validation to LZMA2 encoder when options are changed in the middle of encoding.
2008-12-01Make the memusage functions of LZMA1 and LZMA2 decodersLasse Collin3-9/+17
to validate the filter options.
2008-12-01LZMA2 decoder cleanups. Make it require new LZMA propertiesLasse Collin1-54/+41
also in the first LZMA chunk after a dictionary reset in uncompressed chunk.
2008-10-07Made the preset numbering more logical in liblzma API.Lasse Collin1-1/+2
2008-09-27Some API changes, bug fixes, cleanups etc.Lasse Collin9-123/+112
2008-09-17Miscellaneous LZ and LZMA encoder cleanupsLasse Collin3-101/+23
2008-09-13Renamed constants:Lasse Collin3-14/+14
- LZMA_VLI_VALUE_MAX -> LZMA_VLI_MAX - LZMA_VLI_VALUE_UNKNOWN -> LZMA_VLI_UNKNOWN - LZMA_HEADER_ERRRO -> LZMA_OPTIONS_ERROR
2008-08-31Fix wrong pointer calculation in LZMA encoder.Lasse Collin1-1/+3
2008-08-28Sort of garbage collection commit. :-| Many things are stillLasse Collin21-2334/+3425
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.
2008-06-20Remove some redundant code from LZMA encoder.Lasse Collin1-14/+1
2008-06-19Add limit of lc + lp <= 4. Now we can allocate theLasse Collin5-90/+34
literal coder as part of the main LZMA encoder or decoder structure. Make the LZMA decoder to rely on the current internal API to free the allocated memory in case an error occurs.
2008-06-18CommentsLasse Collin1-5/+2
2008-06-18Update the code to mostly match the new simpler file formatLasse Collin2-5/+18
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.
2008-06-11Fix uninitialized variable in LZMA encoder. This wasLasse Collin1-0/+2
introduced in 369f72fd656f537a9a8e06f13e6d0d4c242be22f.
2008-06-01Fix a buffer overflow in the LZMA encoder. It was due to myLasse Collin5-318/+320
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.
2008-04-24Added two assert()s.Lasse Collin1-1/+3
2008-04-24Fix fastpos problem in Makefile.am when built with --enable-small.Lasse Collin1-1/+4
2008-03-22Update a comment to use the variable name rep_len_decoder.Lasse Collin1-1/+1
(And BTW, the previous commit actually did change the program logic slightly.)
2008-03-22Demystified the "state" variable in LZMA code. Use theLasse Collin6-70/+107
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.
2008-03-14Fix data corruption in LZMA encoder. Note that this bug wasLasse Collin1-0/+4
specific to liblzma and was *not* present in LZMA SDK.
2008-03-11Apply a minor speed optimization to LZMA decoder.Lasse Collin1-42/+43
2008-03-10Really fix the price count initialization.Lasse Collin1-2/+2
2008-03-10Initialize align_price_count and match_price_count inLasse Collin1-0/+2
lzma_encoder_init.c. While we don't call fill_distances_prices() and fill_align_prices() in lzma_lzma_encoder_init(), we still need to initialize these two variables so that the fill functions get called in lzma_encoder_getoptimum.c in the beginning of a stream.
2008-02-28Remove two redundant validity checks from the LZMA decoder.Lasse Collin1-19/+4
These are already checked elsewhere, so omitting these gives (very) tiny speed up.
2008-01-18Fix LZMA_SYNC_FLUSH handling in LZ and LZMA encoders.Lasse Collin1-25/+2
That code is now almost completely in LZ coder, where it can be shared with other LZ77-based algorithms in future.
2008-01-15Revised the fastpos code. It now uses the slightly fasterLasse Collin9-44/+746
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.
2008-01-15Removed a few unused macros from lzma_common.h.Lasse Collin1-6/+2
2008-01-15Fix a typo in lzma_encoder.c.Lasse Collin1-1/+1
2008-01-15Convert bittree_get_price() and bittree_reverse_get_price()Lasse Collin2-22/+13
from macros to inline functions.
2008-01-14Remove RC_BUFFER_SIZE from lzma_encoder_private.hLasse Collin1-2/+4
and replace it with a sanity check.
2008-01-14Major changes to LZ encoder, LZMA encoder, and range encoder.Lasse Collin1-31/+43
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.
2008-01-14In lzma_read_match_distances(), don't useLasse Collin1-3/+3
coder->lz.stream_end_was_reached. That variable will be removed, and the check isn't required anyway. Rearrange the check so that it doesn't make one to think that there could be an integer overflow.
2008-01-14More fixes to LZMA decoder's flush marker handling.Lasse Collin1-22/+30
2008-01-05Another bug fix for flush marker detection.Lasse Collin1-1/+9
2008-01-04Fix stupid bugs in flush marker detection.Lasse Collin1-3/+4
2008-01-04Added support for flush marker, which will be in filesLasse Collin2-117/+104
that use LZMA_SYNC_FLUSH with encoder (not implemented yet). This is a new feature in the raw LZMA format, which isn't supported by old decoders. This shouldn't be a problem in practice, since lzma_alone_encoder() will not allow LZMA_SYNC_FLUSH, and thus not allow creating files on decodable with old decoders. Made lzma_decoder.c to require tab width of 4 characters if one wants to fit the code in 80 columns. This makes the code easier to read.
2008-01-04Moved range decoder initialization (reading the firstLasse Collin1-36/+6
five input bytes) from LZMA decoder to range decoder header. Did the same for decoding of direct bits.
2007-12-09Imported to git.Lasse Collin14-0/+3309