Commit Graph

41 Commits

Author SHA1 Message Date
Lasse Collin 7d17818cec Update the code to mostly match the new simpler file format
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.
2008-06-18 18:02:10 +03:00
Lasse Collin ed6664146f Remove support for pre-C89 libc versions that lack memcpy,
memmove, and memset.
2008-05-11 14:24:42 +03:00
Lasse Collin 3be21fb12f Fixed wrong spelling "limitter" to "limiter". This affects
liblzma's API.
2008-04-28 17:06:34 +03:00
Lasse Collin c324325f9f Removed src/liblzma/common/sysdefs.h symlink, which was
annoying, because "make dist" put two copies of sysdefs.h
into the tarball instead of the symlink.
2008-04-25 13:58:56 +03:00
Lasse Collin c99037ea10 Fix a memory leak by calling free(extra->data) in
lzma_extra_free().
2008-04-24 20:25:39 +03:00
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 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 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 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 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 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 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 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 7599bb7064 Plugged a memory leak in stream_decoder.c. 2008-01-16 14:48:04 +02:00
Lasse Collin 5b5b13c7bb Added lzma_memlimit_count(). 2008-01-16 14:46:50 +02:00
Lasse Collin 9bc33a54cb Make Uncompresed Size validation more strict
in alone_decoder.c.
2008-01-16 13:27:03 +02:00
Lasse Collin f10fc6a69d Use fastpos.h when encoding LZMA dictionary size in
Filter Flags encoder.
2008-01-15 14:23:35 +02:00
Lasse Collin e5728142a2 Revised the fastpos code. It now uses the slightly faster
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.
2008-01-15 14:02:22 +02:00
Lasse Collin 10437b5b56 Added bsr.h. 2008-01-15 13:32:13 +02:00
Lasse Collin 78e85cb1a7 Fix CRC code in case --enable-small is used. 2008-01-15 07:44:59 +02:00
Lasse Collin d13d693155 Added precomputed range coder probability price table. 2008-01-15 07:40:21 +02:00
Lasse Collin a670fec802 Small LZMA_SYNC_FLUSH fixes to Block and Single-Stream encoders. 2008-01-14 11:56:41 +02:00
Lasse Collin 379fbbe84d Take advantage of return_if_error() in block_decoder.c. 2008-01-08 23:11:59 +02:00
Lasse Collin 7054c5f588 Fix decoding of Blocks that have only Block Header. 2008-01-08 22:58:42 +02:00
Lasse Collin a751126dbb Fixed encoding of empty files. Arguments to is_size_valid()
were in wrong order in block_encoder.c.
2008-01-08 13:36:29 +02:00
Lasse Collin 918bcb0e07 Removed uncompressed size tracking from Delta encoder too. 2007-12-11 17:08:04 +02:00
Lasse Collin 3e16d51dd6 Remove uncompressed size tracking from the filter encoders.
It's not strictly needed there, and just complicates the
code. LZ encoder never even had this feature.

The primary reason to have uncompressed size tracking in
filter encoders was validating that the application
doesn't give different amount of input that it had
promised. A side effect was to validate internal workings
of liblzma.

Uncompressed size tracking is still present in the Block
encoder. Maybe it should be added to LZMA_Alone and raw
encoders too. It's simpler to have one coder just to
validate the uncompressed size instead of having it
in every filter.
2007-12-11 16:49:19 +02:00
Lasse Collin 2ab8adb516 Added LZMA_SYNC_FLUSH support to the Copy filter. 2007-12-09 21:43:15 +02:00
Lasse Collin 07ac881779 Take advantage of return_if_error() macro in more places.
Cleaned Subblock filter's initialization code too.
2007-12-09 17:06:45 +02:00
Lasse Collin 5d018dc035 Imported to git. 2007-12-09 00:42:33 +02:00