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2227 commits

Author SHA1 Message Date
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
Lasse Collin
107259e306 Fix alignment handling bugs in Subblock encoder.
This leaves one known alignment bug unfixed: If repeat count
doesn't fit into 28-bit integer, the encoder has to split
this to multiple Subblocks with Subblock Type `Repeating Data'.
The extra Subblocks may have wrong alignment. Correct alignment
is restored after the split Repeating Data has been completely
written out.

Since the encoder doesn't even try to fix the alignment unless
the size of Data is at least 4 bytes, to trigger this bug you
need at least 4 GiB of repeating data with sequence length of
4 or more bytes. Since the worst thing done by this bug is
misaligned data (no data corruption), this bug simply isn't
worth fixing, because a proper fix isn't simple.
2008-01-20 20:12:58 +02:00
Lasse Collin
e141fe1895 Implemented LZMA_SYNC_FLUSH support to the Subblock encoder.
The API for handing Subfilters was changed to make it
consistent with LZMA_SYNC_FLUSH.

A few sanity checks were added for Subfilter handling. Some
small bugs were fixed. More comments were added.
2008-01-19 21:16:33 +02:00
Lasse Collin
23c227a864 Revised the Delta filter implementation. The initialization
function is still shared between encoder and decoder, but the
actual coding is in separate files for encoder and decoder.

There are now separate functions for the actual delta
calculation depending on if Delta is the last filter in the
chain or not. If it is the last, the new code copies the
data from input to output buffer and does the delta
calculation at the same time. The old code first copied the
data, then did the delta in the target buffer, which required
reading through the data twice.

Support for LZMA_SYNC_FLUSH was added to the Delta encoder.
This doesn't change anything in the file format.
2008-01-19 15:19:21 +02:00
Lasse Collin
61dc82f3e3 Added the debug directory and the first debug tool
(sync_flush). These tools are not built unless the
user runs "make" in the debug directory.
2008-01-18 20:18:08 +02:00
Lasse Collin
0ae3208db9 Added test files to test usage of flush marker in LZMA. 2008-01-18 20:13:00 +02:00
Lasse Collin
ab5feaf1fc Fix LZMA_SYNC_FLUSH handling in LZ and LZMA encoders.
That code is now almost completely in LZ coder, where
it can be shared with other LZ77-based algorithms in
future.
2008-01-18 20:02:52 +02:00
Lasse Collin
079c4f7fc2 Don't add -g to CFLAGS when --enable-debug is specified.
It's the job of the user to put that in CFLAGS.
2008-01-18 17:21:24 +02:00
Lasse Collin
61d1784d8f Set stdin and stdout to binary mode on Windows. This patch is
a forward port of b7b22fcb979a16d3a47c8001f058c9f7d4416068
from lzma-utils-legacy.git. I don't know if the new code base
builds on Windows, but this is a start.
2008-01-18 14:17:37 +02:00
Lasse Collin
c9cba97691 Added test_compress.sh and bunch of files needed by it.
This new set of tests compress and decompress several
test files with many different compression options.
This set of tests will be extended later.
2008-01-18 00:50:29 +02:00
Lasse Collin
33be3c0e24 Subblock decoder: Don't exit the main loop in decode_buffer()
too early if we hit End of Input while decoding a Subblock of
type Repeating Data. To keep the loop termination condition
elegant, the order of enumerations in coder->sequence were
changed.

To keep the case-labels in roughly the same order as the
enumerations in coder->sequence, large chunks of code was
moved around. This made the diff big and ugly compared to
the amount of the actual changes made.
2008-01-17 18:56:53 +02:00
Lasse Collin
b254bd97b1 Fix wrong too small size of argument unfiltered_max
in ia64_coder_init(). It triggered assert() in
simple_coder.c, and could have caused a buffer overflow.

This error was probably a copypaste mistake, since most
of the simple filters use unfiltered_max = 4.
2008-01-17 17:39:42 +02:00
Lasse Collin
8f5794c8f1 Added --delta to the output of "lzma --help". 2008-01-17 17:27:45 +02:00
Lasse Collin
f88590e001 Fix Subblock docoder: If Subblock filter was used with known
Uncompressed Size, and the last output byte was from RLE,
the code didn't stop decoding as it should have done.
2008-01-17 13:14:20 +02:00
Lasse Collin
bc0b945ca3 Tiny non-technical edits to file-format.txt. 2008-01-16 16:33:37 +02:00
Lasse Collin
7599bb7064 Plugged a memory leak in stream_decoder.c. 2008-01-16 14:48:04 +02:00