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502 Commits

Author SHA1 Message Date
Lasse Collin 22ba3b0b50 Make unlzma and lzcat symlinks. 2008-04-24 20:23:05 +03:00
Lasse Collin 17c36422d4 Fixed a bug in command line option parsing. 2008-04-24 20:20:27 +03:00
Lasse Collin 283f939974 Added two assert()s. 2008-04-24 20:19:20 +03:00
Lasse Collin eb348a60b6 Switch to uint16_t as the type of range coder probabilities. 2008-04-24 19:22:53 +03:00
Lasse Collin 6c5306e312 Fix wrong return type (uint32_t -> bool). 2008-04-24 18:39:57 +03:00
Lasse Collin 712cfe3ebf Fix data corruption in LZ encoder with LZMA_SYNC_FLUSH. 2008-04-24 18:38:00 +03:00
Lasse Collin bc04486e36 Fix fastpos problem in Makefile.am when built with --enable-small. 2008-04-24 17:33:01 +03:00
Lasse Collin 7ab493924e Use 64-bit integer as range encoder's cache size. This fixes a 
theoretical data corruption, which should be very hard to trigger
even intentionally.
 2008-04-24 17:30:51 +03:00
Lasse Collin 641998c3e1 Replaced the range decoder optimization that used arithmetic 
right shift with as fast version that doesn't need
arithmetic right shift. Removed the related check from
configure.ac.
 2008-03-24 16:38:40 +02:00
Lasse Collin ad999efd27 Take advantage of arithmetic right shift in range decoder. 2008-03-22 14:39:34 +02:00
Lasse Collin 03e0e8a0d7 Added autoconf check to detect if we can use arithmetic 
right shift for optimizations.
 2008-03-22 14:18:29 +02:00
Lasse Collin 7521bbdc83 Update a comment to use the variable name rep_len_decoder. 
(And BTW, the previous commit actually did change the
program logic slightly.)
 2008-03-22 01:26:36 +02:00
Lasse Collin 63b74d000e Demystified the "state" variable in LZMA code. Use the 
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.
 2008-03-22 00:57:33 +02:00
Lasse Collin e6eb0a2675 Fix data corruption in LZMA encoder. Note that this bug was 
specific to liblzma and was *not* present in LZMA SDK.
 2008-03-14 23:16:11 +02:00
Lasse Collin 7d516f5129 Fix a comment API header. 2008-03-14 21:32:37 +02:00
Lasse Collin 748d6e4274 Make lzma_stream.next_in const. Let's see if anyone complains. 2008-03-12 23:14:50 +02:00
Lasse Collin bfde3b24a5 Apply a minor speed optimization to LZMA decoder. 2008-03-11 15:35:34 +02:00
Lasse Collin f310c50286 Initialize the last byte of the dictionary to zero so that 
lz_get_byte(lz, 0) returns zero. This was broken by
1a3b218598.
 2008-03-11 15:17:16 +02:00
Lasse Collin 5ead36cf7f Really fix the price count initialization. 2008-03-10 15:57:55 +02:00
Lasse Collin d4d7feb83d Updated THANKS. 2008-03-10 13:47:17 +02:00
Lasse Collin 0541c5ea63 Initialize align_price_count and match_price_count in 
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.
 2008-03-10 13:46:48 +02:00
Lasse Collin 596fa1fac7 Always initialize lz->temp_size in lz_decoder.c. temp_size did 
get initialized as a side-effect after allocating a new decoder,
but not when the decoder was reused.
 2008-03-10 13:44:29 +02:00
Lasse Collin 45e43e1695 Don't fill allocated memory with 0xFD when debugging is 
enabled. It hides errors from Valgrind.
 2008-03-10 13:41:25 +02:00
Lasse Collin c0e19e0662 Remove two redundant validity checks from the LZMA decoder. 
These are already checked elsewhere, so omitting these
gives (very) tiny speed up.
 2008-02-28 10:24:31 +02:00
Lasse Collin de74858062 Tiny clean up to file-format.txt. 2008-02-06 13:25:32 +02:00
Lasse Collin 1a3b218598 Don't memzero() the history buffer when initializing LZ 
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.
 2008-02-02 14:51:06 +02:00
Lasse Collin 7e796e312b Do uncompressed size validation in raw encoder. This way 
it gets done for not only raw encoder, but also Block
and LZMA_Alone encoders.
 2008-02-01 08:39:26 +02:00
Lasse Collin 7dd48578a3 Avoid unneeded function call in raw_common.c. 2008-02-01 08:32:05 +02:00
Lasse Collin b596fac963 Updated THANKS. 2008-01-26 21:42:38 +02:00
Lasse Collin e9f6e9c075 Added note.GNU-stack to x86 assembler files. It is needed 
when using non-executable stack.
 2008-01-26 21:40:23 +02:00
Lasse Collin 4c7ad179c7 Added api/lzma/easy.h. I had forgot to add this to the 
git repo. Thanks to Stephan Kulow.
 2008-01-26 19:12:50 +02:00
Lasse Collin 288b232f54 Added more test files. 2008-01-26 11:09:17 +02:00
Lasse Collin c467b0defc Added more test files. 2008-01-26 10:47:55 +02:00
Lasse Collin f9842f7127 Return LZMA_HEADER_ERROR if LZMA_SYNC_FLUSH is used with any 
of the so called simple filters. If there is demand, limited
support for LZMA_SYNC_FLUSH may be added in future.

After this commit, using LZMA_SYNC_FLUSH shouldn't cause
undefined behavior in any situation.
 2008-01-26 00:25:34 +02:00
Lasse Collin e988ea1d1a Added more Multi-Block test files. Improved some 
descriptions in the test files' README.
 2008-01-25 23:50:35 +02:00
Lasse Collin 4441e00418 Combine lzma_options_block validation needed by both Block 
encoder and decoder, and put the shared things to
block_private.h. Improved the checks a little so that
they may detect too big Compressed Size at initialization
time if lzma_options_block.total_size or .total_limit is
known.

Allow encoding and decoding Blocks with combinations of
fields that are not allowed by the file format specification.
Doing this requires that the application passes such a
combination in lzma_options_lzma; liblzma doesn't do that,
but it's not impossible that someone could find them useful
in some custom file format.
 2008-01-25 23:12:36 +02:00
Lasse Collin bf4200c818 Added test_memlimit.c. 2008-01-25 19:21:22 +02:00
Lasse Collin 7b8fc7e6b5 Improved the memory limitter: 
- Added lzma_memlimit_max() and lzma_memlimit_reached()
    API functions.
  - Added simple estimation of malloc()'s memory usage
    overhead.
  - Fixed integer overflow detection in lzma_memlimit_alloc().
  - Made some white space cleanups and added more comments.

The description of lzma_memlimit_max() in memlimit.h is bad
and should be improved.
 2008-01-25 19:20:28 +02:00
Lasse Collin e0c3d0043d Use more parenthesis in succeed() macro in tests/tests.h. 2008-01-25 13:55:52 +02:00
Lasse Collin 1fd76d4881 Added more Multi-Block Stream test files. 2008-01-24 14:49:34 +02:00
Lasse Collin 6e27b1098a Added bunch of test files containing Multi-Block Streams. 2008-01-24 00:46:05 +02:00
Lasse Collin db9df0a960 Fix decoding of empty Metadata Blocks, that don't have 
even the Metadata Flags field. Earlier the code allowed
such files; now they are prohibited as the file format
specification requires.
 2008-01-23 23:43:00 +02:00
Lasse Collin 765f0b05f6 Fix a bug related to 99e12af4e2. 
lzma_metadata.header_metadata_size was not properly set to
zero if the Metadata had only the Metadata Flags field.
 2008-01-23 23:38:18 +02:00
Lasse Collin 3a7cc5c3de Fix decoding of Extra Records that have empty Data. 2008-01-23 23:35:49 +02:00
Lasse Collin e5fdec93e2 Add the trailing '\0' to lzma_extra.data as the API header 
already documents.
 2008-01-23 22:02:38 +02:00
Lasse Collin ed40dc5a2c Added debug/full_flush.c. 2008-01-23 21:21:21 +02:00
Lasse Collin ae0cd09a66 Return LZMA_STREAM_END instead of LZMA_OK if 
LZMA_SYNC_FLUSH or LZMA_FULL_FLUSH is used when
there's no unfinished Block open.
 2008-01-23 21:05:33 +02:00
Lasse Collin 0e80ded13d Added bad-single-none-footer_filter_flags.lzma and 
bad-single-none-too_long_vli.lzma.
 2008-01-23 20:05:01 +02:00
Lasse Collin 8c8eb14055 Fixed a typo. 2008-01-23 13:42:35 +02:00
Lasse Collin 980f65a9a1 Fix a memory leak in the Subblock encoder. 2008-01-23 13:40:45 +02:00