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2342 commits

Author SHA1 Message Date
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
Lasse Collin
99e12af4e2 Fix Size of Header Metadata Block handling. Now
lzma_metadata.header_metadata_size == LZMA_VLI_VALUE_UNKNOWN
is not allowed at all. To indicate missing Header Metadata
Block, header_metadata_size must be set to zero. This is
what Metadata decoder does after this patch too.

Note that other missing fields in lzma_metadata are still
indicated with LZMA_VLI_VALUE_UNKNOWN. This isn't as
illogical as it sounds at first, because missing Size of
Header Metadata Block means that Header Metadata Block is
not present in the Stream. With other Metadata fields,
a missing field means only that the value is unknown.
2008-01-23 13:36:07 +02:00
Lasse Collin
58b78ab20c Fix a memory leak in metadata_decoder.c. 2008-01-23 13:15:55 +02:00
Lasse Collin
4d8cdbdab4 Fix the fix 863028cb7a which
just moved to problem. Now it's really fixed.
2008-01-23 13:13:58 +02:00
Lasse Collin
67321de963 Take advantage of return_if_error() macro in
lzma_info_metadata_set() in info.c.
2008-01-23 00:21:04 +02:00
Lasse Collin
863028cb7a Fixed a dangling pointer that caused invalid free(). 2008-01-23 00:18:32 +02:00
Lasse Collin
cf49f42a6b Added lzma_easy_* functions. These should make using
liblzma as easy as using zlib, because the easy API
don't require developers to know any fancy LZMA options.

Note that Multi-Block Stream encoding is currently broken.
The easy API should be OK, the bug(s) are elsewhere.
2008-01-22 22:49:24 +02:00
Lasse Collin
1747b85a43 Fix Multi-Block Stream encoder's EOPM usage. 2008-01-22 21:16:22 +02:00
Lasse Collin
0ed6f1adce Made lzma_extra pointers const in lzma_options_stream. 2008-01-22 00:15:11 +02:00
Lasse Collin
305afa38f6 Updated debug/sync_flush.c. 2008-01-20 20:15:21 +02:00
Lasse Collin
d53e9b7705 Added debug/repeat.c. 2008-01-20 20:14:26 +02:00