Commit Graph

1111 Commits

Author SHA1 Message Date
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 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 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 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 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 7599bb7064 Plugged a memory leak in stream_decoder.c. 2008-01-16 14:48:04 +02:00
Lasse Collin 0b58153931 Added memory leak detection to lzmadec.c. 2008-01-16 14:47:27 +02:00
Lasse Collin 5b5b13c7bb Added lzma_memlimit_count(). 2008-01-16 14:46:50 +02:00
Lasse Collin 19389f2b82 Added ARRAY_SIZE(array) macro. 2008-01-16 14:31:44 +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 01d71d60b7 Free the allocated memory in lzmadec if debugging is
enabled. This should make it possible to detect possible
memory leaks with Valgrind.
2008-01-15 17:46:59 +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 54ec204f58 Omit invalid space from printf() format string
in price_table_gen.c.
2008-01-15 12:20:41 +02:00
Lasse Collin 01b4b19f49 Removed a few unused macros from lzma_common.h. 2008-01-15 09:54:34 +02:00
Lasse Collin 19bd7f3cf2 Fix a typo in lzma_encoder.c. 2008-01-15 08:37:42 +02:00
Lasse Collin 9f9b198301 Convert bittree_get_price() and bittree_reverse_get_price()
from macros to inline functions.
2008-01-15 08:36:25 +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 362dc3843b Remove RC_BUFFER_SIZE from lzma_encoder_private.h
and replace it with a sanity check.
2008-01-14 13:42:43 +02:00
Lasse Collin e22b37968d Major changes to LZ encoder, LZMA encoder, and range encoder.
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.
2008-01-14 13:39:54 +02:00
Lasse Collin b59ef39737 Added one assert() to process.c of the command line tool. 2008-01-14 13:34:29 +02:00
Lasse Collin 9547e734a0 Don't use coder->lz.stream_end_was_reached in assertions
in match_c.h.
2008-01-14 12:09:52 +02:00
Lasse Collin 3e09e1c058 In lzma_read_match_distances(), don't use
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.
2008-01-14 12:08:02 +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 3599dba957 More fixes to LZMA decoder's flush marker handling. 2008-01-14 11:54:56 +02:00
Lasse Collin f73c2ab607 Eliminate lzma_lz_encoder.must_move_pos. It's needed
only in one place which isn't performance criticial.
2008-01-10 17:13:42 +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 faeac7b7ac Disable CRC32 from Block Headers when --check=none
has been specified.
2008-01-08 18:50:30 +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 e2417b2b91 More pre-C99 inttypes.h compatibility fixes. Now the code
should work even if the system has no inttypes.h.
2008-01-08 00:48:30 +02:00
Lasse Collin c15a7abf66 With printf(), use PRIu64 with a cast to uint64_t instead
of %zu, because some pre-C99 libc versions don't support %zu.
2008-01-06 19:45:27 +02:00
Lasse Collin 4e7e54c4c5 Introduced compatibility with systems that have pre-C99
or no inttypes.h. This is useful when the compiler has
good enough support for C99, but libc headers don't.

Changed liblzma API so that sys/types.h and inttypes.h
have to be #included before #including lzma.h. On systems
that don't have C99 inttypes.h, it's the problem of the
applications to provide the required types and macros
before #including lzma.h.

If lzma.h defined the missing types and macros, it could
conflict with third-party applications whose configure
has detected that the types are missing and defined them
in config.h already. An alternative would have been
introducing lzma_uint32 and similar types, but that would
just be an extra pain on modern systems.
2008-01-06 16:27:41 +02:00
Lasse Collin a71864f77d Fix typo in comment (INT64_MAX -> UINT64_MAX). 2008-01-05 19:57:00 +02:00
Lasse Collin d160ee3259 Another bug fix for flush marker detection. 2008-01-05 01:20:24 +02:00
Lasse Collin fc67f79f60 Fix stupid bugs in flush marker detection. 2008-01-04 21:37:01 +02:00
Lasse Collin 0029cbbabe Added support for flush marker, which will be in files
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.
2008-01-04 21:30:33 +02:00
Lasse Collin bbfd1f6ab0 Moved range decoder initialization (reading the first
five input bytes) from LZMA decoder to range decoder
header. Did the same for decoding of direct bits.
2008-01-04 20:45:05 +02:00
Lasse Collin 44b333d461 Use the filename suffix .S instead of .s for assembler files
so that the preprocessor removes the /* */ style comments,
which are not supported by some non-GNU assemblers (Solaris)
that otherwise work with this code.
2007-12-14 10:07:10 +02:00
Lasse Collin ec1c82b2e8 Fixed wrong symbol name in crc64_x86.s. 2007-12-14 09:59:05 +02:00
Lasse Collin 2881570df6 Use .globl instead of .global in x86 assembler code for
better portability. Still needs fixing the commenting.
2007-12-14 09:53:24 +02:00
Lasse Collin 698470b8f3 Fixed a few short options that take an argument.
short_opts[] was missing colons to indicate
required argument. Thanks to Fabio Pedretti for
the bug report.
2007-12-13 20:14:37 +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 5286723e0d Get rid of no-NLS gnulib. I don't know how to get it
working with Automake. People who want smaller lzmadec
should use --disable-nls on non-GNU systems.
2007-12-11 14:10:53 +02:00
Lasse Collin 7c1ad41eb6 Fixed wrong type of flags_size in Subblock encoder. 2007-12-11 11:18:58 +02:00
Lasse Collin ce64df7162 Bumped version number to 4.42.3alpha. 2007-12-10 20:44:16 +02:00
Lasse Collin 2ab8adb516 Added LZMA_SYNC_FLUSH support to the Copy filter. 2007-12-09 21:43:15 +02:00
Lasse Collin 329c272d50 Added missing LZMA_API to the C versions of the CRC functions.
The x86 assembler versions were already OK.
2007-12-09 17:14:07 +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 ff946ceb79 Re-enabled the security checks in Subblock decoder
that were disabled for debugging reasons.
2007-12-09 11:24:48 +02:00
Lasse Collin 5d018dc035 Imported to git. 2007-12-09 00:42:33 +02:00