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328 commits

Author SHA1 Message Date
Lasse Collin
bd7ca1dad5 Assume 32 MiB of RAM on unsupported operating systems like 
the comment in hardware.c already said.
 2009-02-07 17:07:52 +02:00
Lasse Collin
bfd91198e4 Support LZMA_API_STATIC in assembler files to 
avoid __declspec(dllexport) equivalent.
 2009-02-07 15:55:47 +02:00
Lasse Collin
3306cf3883 Introduced LZMA_API_STATIC macro, which the applications 
need to #define when linking against static liblzma on
platforms like Windows. Most developers don't need to
care about LZMA_API_STATIC at all.
 2009-02-07 11:11:50 +02:00
Lasse Collin
75905a9afc Various code cleanups the the xz command line tool. 
It now builds with MinGW.
 2009-02-05 09:12:57 +02:00
Lasse Collin
d0c0b9e94e Another utime() fix. 2009-02-03 12:15:17 +02:00
Lasse Collin
ccf92a29e8 Fix wrong filename argument for utime() and utimes(). 
This doesn't affect most systems, since most systems
have better functions available.
 2009-02-03 10:41:11 +02:00
Lasse Collin
99c1c2abfa Updated the x86 assembler code: 
- Use call/ret pair to get instruction pointer for PIC.
  - Use PIC only if PIC or __PIC__ is #defined.
  - The code should work on MinGW and Darwin in addition
    to GNU/Linux and Solaris.
 2009-02-02 21:19:01 +02:00
Lasse Collin
22a0c6dd94 Modify LZMA_API macro so that it works on Windows with 
other compilers than MinGW. This may hurt readability
of the API headers slightly, but I don't know any
better way to do this.
 2009-02-02 20:14:03 +02:00
Lasse Collin
8dd7b6052e Fix a bug in lzma_block_buffer_decode(), although this 
function should be rewritten anyway.
 2009-02-01 22:40:35 +02:00
Lasse Collin
55fd41431e Added initial version of raw buffer-to-buffer coding 
functions, and cleaned up filter.h API header a little.
May be very buggy, not tested yet.
 2009-02-01 22:39:07 +02:00
Lasse Collin
3e54ecee5c Fix missing newlines in xzdec.c. 2009-02-01 00:11:20 +02:00
Lasse Collin
d64ca34f1b Use __cdecl also for function pointers in liblzma API when 
on Windows.
 2009-02-01 00:10:07 +02:00
Lasse Collin
6a2eb54092 Add LZMA_API to liblzma API headers. It's useful at least 
on Windows. sysdefs.h no longer #includes lzma.h, so lzma.h
has to be #included separately where needed.
 2009-01-31 11:01:48 +02:00
Lasse Collin
d9993fcb4d Use _WIN32 instead of WIN32 in xzdec.c to test if compiling on Windows. 2009-01-31 10:13:09 +02:00
Lasse Collin
2dbdc5befb Fix two lines in lzma.h on which the # wasn't at the 
beginning of the line.
 2009-01-31 10:02:52 +02:00
Lasse Collin
4ab7601091 Add support for using liblzma headers in MSVC, which has no 
stdint.h or inttypes.h.
 2009-01-31 09:55:05 +02:00
Lasse Collin
b2172cf823 Fix # -> ## in a macro in lzma.h. 2009-01-31 08:49:54 +02:00
Lasse Collin
f54bcf6f80 Remove dangling crc64_init.c. 2009-01-30 00:29:58 +02:00
Lasse Collin
3241317093 Fix uninitialized variables in alone_decoder.c. This bug was 
triggered by the previous commit, since these variables were
not used by anything before support for a preset dictionary.
 2009-01-28 08:43:26 +02:00
Lasse Collin
f76e39cf93 Added initial support for preset dictionary for raw LZMA1 
and LZMA2. It is not supported by the .xz format or the xz
command line tool yet.
 2009-01-27 18:36:05 +02:00
Lasse Collin
449b8c832b Regenerate the CRC tables without trailing blanks. 2009-01-26 20:09:17 +02:00
Jim Meyering
850f740042 remove trailing blanks from all but .xz files 2009-01-26 20:01:51 +02:00
Lasse Collin
667481f1aa Add lzma_block_buffer_decode(). 2009-01-26 14:34:10 +02:00
Lasse Collin
5fb34d8324 Add more sanity checks to lzma_stream_buffer_decode(). 2009-01-26 14:33:28 +02:00
Lasse Collin
c129748675 Avoid hardcoded constant in easy.c. 2009-01-26 14:33:13 +02:00
Lasse Collin
1859d22d75 Tiny bit better sanity check in block_util.c 2009-01-26 13:06:49 +02:00
Lasse Collin
2c5fe958e4 Fix a dumb bug in Block decoder, which made it return 
LZMA_DATA_ERROR with valid data. The bug was added in
e114502b2b.
 2009-01-25 01:35:56 +02:00
Lasse Collin
c81f13ff29 Added lzma_stream_buffer_decode() and made minor cleanups. 2009-01-23 22:27:50 +02:00
Lasse Collin
0b3318661c Fix a comment. 2009-01-22 12:53:33 +02:00
Lasse Collin
9ec80355a7 Add some single-call buffer-to-buffer coding functions. 2009-01-20 16:37:27 +02:00
Lasse Collin
d8b58d0993 Block encoder cleanups 2009-01-20 13:45:41 +02:00
Lasse Collin
0c09810cb3 Use LZMA_PROG_ERROR in lzma_code() as documented in base.h. 2009-01-20 10:35:15 +02:00
Lasse Collin
2f1a8e8eb8 Fix handling of non-fatal errors in lzma_code(). 2009-01-19 22:53:18 +02:00
Lasse Collin
4810b6bc25 Move some LZMA2 constants to lzma2_encoder.h so that they 
can be used outside lzma2_encoder.c.
 2009-01-19 14:00:33 +02:00
Lasse Collin
00be5d2e09 Remove dead code. 2009-01-19 13:52:36 +02:00
Lasse Collin
128586213f Beta was supposed to be API stable but I had forgot to rename 
lzma_memlimit_encoder and lzma_memlimit_decoder to
lzma_raw_encoder_memlimit and lzma_raw_decoder_memlimit. :-(
Now it is fixed. Hopefully it doesn't cause too much trouble
to those who already thought API is stable.
 2009-01-17 14:24:25 +02:00
Lasse Collin
8286a60b8f Use pthread_sigmask() instead of sigprocmask() when pthreads 
are enabled.
 2009-01-07 18:41:15 +02:00
Lasse Collin
4fd43cb3a9 Bumped version to 4.999.8beta right after the release 
of 4.999.7beta.
 2008-12-31 20:01:00 +02:00
Lasse Collin
d1d17a40d3 Prepare for 4.999.7beta release. 2008-12-31 17:41:46 +02:00
Lasse Collin
88d3e6b0b1 Cleaned up some comments in the API headers. 2008-12-31 17:15:03 +02:00
Lasse Collin
322ecf93c9 Renamed lzma_options_simple to lzma_options_bcj in the API. 
The internal implementation is still using the name "simple".
It may need some cleanups, so I look at it later.
 2008-12-31 16:29:39 +02:00
Lasse Collin
28e75f7086 Updated src/liblzma/Makefile.am to use liblzma.pc.in, which 
should have been in the previous commit.
 2008-12-31 00:48:23 +02:00
Lasse Collin
7ed9d943b3 Remove lzma_init() and other init functions from liblzma API. 
Half of developers were already forgetting to use these
functions, which could have caused total breakage in some future
liblzma version or even now if --enable-small was used. Now
liblzma uses pthread_once() to do the initializations unless
it has been built with --disable-threads which make these
initializations thread-unsafe.

When --enable-small isn't used, liblzma currently gets needlessly
linked against libpthread (on systems that have it). While it is
stupid for now, liblzma will need threads in future anyway, so
this stupidity will be temporary only.

When --enable-small is used, different code CRC32 and CRC64 is
now used than without --enable-small. This made the resulting
binary slightly smaller, but the main reason was to clean it up
and to handle the lack of lzma_init_check().

The pkg-config file lzma.pc was renamed to liblzma.pc. I'm not
sure if it works correctly and portably for static linking
(Libs.private includes -pthread or other operating system
specific flags). Hopefully someone complains if it is bad.

lzma_rc_prices[] is now included as a precomputed array even
with --enable-small. It's just 128 bytes now that it uses uint8_t
instead of uint32_t. Smaller array seemed to be at least as fast
as the more bloated uint32_t array on x86; hopefully it's not bad
on other architectures.
 2008-12-31 00:30:49 +02:00
Lasse Collin
050eb14d29 Revert a change made in 3b34851de1 
that was related to LZMA_MODE_FAST. The original code is slightly
faster although it compresses slightly worse. But since it is fast
mode, it is better to select the faster version.
 2008-12-27 19:32:20 +02:00
Lasse Collin
4820f10d0f Some xz command line tool improvements. 2008-12-27 19:30:19 +02:00
Lasse Collin
e33194e79d Bunch of liblzma tweaks, including some API changes. 
The API and ABI should now be very close to stable,
although the code behind it isn't yet.
 2008-12-27 19:27:49 +02:00
Lasse Collin
4d00652e75 Updated Makefile.am that was missing from the previous commit. 2008-12-18 13:42:52 +02:00
Lasse Collin
634636fa56 Remove the alignment functions for now. Maybe they will 
be added back in some form later, but the current version
wasn't modular, so it would need fixing anyway.
 2008-12-17 21:49:53 +02:00
Lasse Collin
4fed98417d xz message handling improvements 2008-12-17 20:11:23 +02:00
Lasse Collin
653e457e37 Fix a dumb bug in .lzma decoder which was introduced in 
the previous commit. (Probably the previous commit has
other bugs too, it wasn't tested.)
 2008-12-15 23:26:43 +02:00
Lasse Collin
671a5adf1e Bunch of liblzma API cleanups and fixes. 2008-12-15 19:39:13 +02:00
Lasse Collin
17781c2c20 The LZMA2 decoder fix introduced a bug to LZ decoder, 
which made LZ decoder return too early after dictionary
reset. This fixes it.
 2008-12-15 14:26:52 +02:00
Lasse Collin
ff7fb2c605 Fix data corruption in LZMA2 decoder. 2008-12-15 10:01:59 +02:00
Lasse Collin
8582d392ba Remove obsolete comment. 2008-12-10 01:31:00 +02:00
Lasse Collin
b1ae6dd731 Use "decompression" consistently in --long-help. 2008-12-10 01:27:15 +02:00
Lasse Collin
1ea9e7f15a Added preset=NUM to --lzma1 and --lzma2. This makes it easy 
to take a preset as a template and modify it a little.
 2008-12-10 01:23:58 +02:00
Lasse Collin
6efa2d80d4 Make the memusage functions of LZMA1 and LZMA2 encoders 
to validate the filter options. Add missing validation
to LZMA2 encoder when options are changed in the middle
of encoding.
 2008-12-09 17:41:49 +02:00
Lasse Collin
ef7890d564 In command line tool, take advantage of memusage calculation's 
ability to also validate the filter chain and options (not
implemented yet for all filters).
 2008-12-01 23:04:12 +02:00
Lasse Collin
ccd57afa09 Validate the filter chain before checking filter-specific 
memory usage.
 2008-12-01 22:59:28 +02:00
Lasse Collin
c596fda40b Make the memusage functions of LZMA1 and LZMA2 decoders 
to validate the filter options.
 2008-12-01 22:58:22 +02:00
Lasse Collin
c58f469be5 Added the changes for Delta filter that should have been 
part of 656ec87882.
 2008-12-01 22:55:18 +02:00
Lasse Collin
cd70801520 LZMA2 decoder cleanups. Make it require new LZMA properties 
also in the first LZMA chunk after a dictionary reset in
uncompressed chunk.
 2008-12-01 22:50:28 +02:00
Lasse Collin
656ec87882 Added lzma_delta_coder_memusage() which also validates 
the options.
 2008-12-01 16:30:11 +02:00
Lasse Collin
c7007ddf06 Tested using COLUMNS environment variable to avoid broken 
progress indicator but since COLUMNS isn't usually available,
the code was left commented out.
 2008-11-28 12:00:48 +02:00
Lasse Collin
ae65dcfde2 Cleanups to message.c. 2008-11-27 19:28:59 +02:00
Lasse Collin
a8368b75cd Remove the nowadays unneeded memory limitting malloc() wrapper. 2008-11-25 02:37:47 +02:00
Lasse Collin
69472ee5f0 VLI encoder and decoder cleanups. Made encoder return 
LZMA_PROG_ERROR in single-call mode if there's no output
space.
 2008-11-23 15:09:03 +02:00
Lasse Collin
4249c8c15a Typo fix 2008-11-22 17:44:33 +02:00
Lasse Collin
6d1d6f4598 Support NetBSD's errno for O_NOFOLLOW. 2008-11-20 22:59:10 +02:00
Lasse Collin
f901a290ee Build xzdec and lzmadec from xzdec.c. xzdec supports only .xz 
files and lzmadec only .lzma files.
 2008-11-20 18:05:52 +02:00
Lasse Collin
86a0ed8f01 Minor cleanups to xzdec. 2008-11-20 11:01:29 +02:00
Lasse Collin
1880a3927b Renamed lzma to xz and lzmadec to xzdec. We create symlinks 
lzma, unlzma, and lzcat in "make install" for backwards
compatibility with LZMA Utils 4.32.x; I'm not sure if this
should be the default though.
 2008-11-19 23:52:24 +02:00
Lasse Collin
e114502b2b Oh well, big messy commit again. Some highlights: 
- Updated to the latest, probably final file format version.
  - Command line tool reworked to not use threads anymore.
    Threading will probably go into liblzma anyway.
  - Memory usage limit is now about 30 % for uncompression
    and about 90 % for compression.
  - Progress indicator with --verbose
  - Simplified --help and full --long-help
  - Upgraded to the last LGPLv2.1+ getopt_long from gnulib.
  - Some bug fixes
 2008-11-19 20:46:52 +02:00
Lasse Collin
0f295bf7a3 Fixed some help messages. 2008-10-07 16:42:18 +03:00
Lasse Collin
1e8e4fd1f3 Made the preset numbering more logical in liblzma API. 2008-10-07 09:40:31 +03:00
Lasse Collin
fcfb86c777 Fixed suffix handling with --format=raw. 2008-10-03 07:06:48 +03:00
Lasse Collin
bd137524f2 Initial changes to change the suffix of the new format to .xz. 
This also fixes a bug related to --suffix option. Some issues
with suffixes with --format=raw were not fixed.
 2008-10-02 22:51:46 +03:00
Lasse Collin
8e60c889a2 Fixed Stream decoder to actually use the first_stream variable. 2008-09-30 13:57:44 +03:00
Lasse Collin
a6639022fd Fixed uninitialized variable in Stream decoder. 2008-09-30 13:34:07 +03:00
Lasse Collin
ea560b0ea8 Fix conflicting Subblock helper filter's ID. 2008-09-27 23:49:24 +03:00
Lasse Collin
ad97483b6e Changed magic bytes to match the updated spec. Filename 
suffix wasn't changed yet.
 2008-09-27 23:37:13 +03:00
Lasse Collin
1dcecfb09b Some API changes, bug fixes, cleanups etc. 2008-09-27 19:09:21 +03:00
Lasse Collin
f147666a5c Miscellaneous LZ and LZMA encoder cleanups 2008-09-17 22:11:39 +03:00
Lasse Collin
13d68b0698 LZ decoder cleanup 2008-09-13 13:54:00 +03:00
Lasse Collin
13a74b78e3 Renamed constants: 
- LZMA_VLI_VALUE_MAX -> LZMA_VLI_MAX
  - LZMA_VLI_VALUE_UNKNOWN -> LZMA_VLI_UNKNOWN
  - LZMA_HEADER_ERRRO -> LZMA_OPTIONS_ERROR
 2008-09-13 12:10:43 +03:00
Lasse Collin
320601b2c7 Improved the Stream Flags handling API. 2008-09-12 22:41:40 +03:00
Lasse Collin
16e8b98f26 Remove a check from Block encoder that should have already 
been removed in 2ba01bfa75.
 2008-09-11 23:09:24 +03:00
Lasse Collin
5a710c3805 Remove bogus #includes. 2008-09-11 20:02:38 +03:00
Lasse Collin
962f2231d4 Fix a compiler error on big endian systems that don't 
support unaligned memory access.
 2008-09-11 10:48:12 +03:00
Lasse Collin
fa3ab0df8a Silence a compiler warning. 2008-09-11 10:46:14 +03:00
Lasse Collin
9373e81e18 Bumped version to 4.999.6alpha. 2008-09-10 19:16:32 +03:00
Lasse Collin
cb072b7c84 Check for LZMA_FILTER_RESERVED_START in filter_flags_encoder.c. 
Use LZMA_PROG_ERROR instead of LZMA_HEADER_ERROR if the Filter ID
is in the reserved range. This allows Block Header encoder to
detect unallowed Filter IDs, which is good for Stream encoder.
 2008-09-10 17:02:00 +03:00
Lasse Collin
123ab0acec Filter handling cleanups 2008-09-10 16:44:32 +03:00
Lasse Collin
9cfcd0c4f2 Comments 2008-09-10 00:33:00 +03:00
Lasse Collin
2ba01bfa75 Cleaned up Block encoder and moved the no longer shared 
code from block_private.h to block_decoder.c. Now the Block
encoder doesn't need compressed_size and uncompressed_size
from lzma_block structure to be initialized.
 2008-09-10 00:27:02 +03:00
Lasse Collin
07efcb5a6b Changed Filter ID of LZMA to 0x20. 2008-09-07 10:23:13 +03:00
Lasse Collin
32fe5fa541 Comments 2008-09-06 23:42:50 +03:00
Lasse Collin
0a31ed9d5e Some API cleanups 2008-09-06 15:14:30 +03:00
Lasse Collin
da98df5440 Added support for raw encoding and decoding to the command 
line tool, and made various cleanups. --lzma was renamed to
--lzma1 to prevent people from accidentally using LZMA when
they want LZMA2.
 2008-09-04 11:53:06 +03:00
Lasse Collin
2496aee8a7 Don't allow LZMA_SYNC_FLUSH with decoders anymore. There's 
simply nothing that would use it. Allow LZMA_FINISH to the
decoders, which will usually ignore it (auto decoder and
Stream decoder being exceptions).
 2008-09-04 10:39:15 +03:00
Lasse Collin
9c75b089b4 Command line tool fixes 2008-09-02 19:33:32 +03:00
Lasse Collin
bab0590504 Auto decoder cleanup 2008-09-02 19:31:42 +03:00
Lasse Collin
689602336d Updated auto decoder to handle LZMA_CONCATENATED when decoding 
LZMA_Alone files. Decoding of concatenated LZMA_Alone files is
intentionally not supported, so it is better to put this in
auto decoder than LZMA_Alone decoder.
 2008-09-02 19:12:12 +03:00
Lasse Collin
80c4158f19 Stream decoder cleanups 2008-09-02 14:56:52 +03:00
Lasse Collin
fc68165745 Some fixes to LZ encoder. 2008-09-02 11:45:39 +03:00
Lasse Collin
ede675f9ac Fix wrong pointer calculation in LZMA encoder. 2008-08-31 11:47:01 +03:00
Lasse Collin
3b34851de1 Sort of garbage collection commit. :-| Many things are still 
broken. API has changed a lot and it will still change a
little more here and there. The command line tool doesn't
have all the required changes to reflect the API changes, so
it's easy to get "internal error" or trigger assertions.
 2008-08-28 22:53:15 +03:00
Lasse Collin
eaafc4367c Remove some redundant code from LZMA encoder. 2008-06-20 16:19:54 +03:00
Lasse Collin
0809c46534 Add limit of lc + lp <= 4. Now we can allocate the 
literal coder as part of the main LZMA encoder or
decoder structure.

Make the LZMA decoder to rely on the current internal API
to free the allocated memory in case an error occurs.
 2008-06-19 16:35:08 +03:00
Lasse Collin
d25ab1b961 Comments 2008-06-18 21:45:19 +03:00
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
803194ddd2 Fix uninitialized variable in LZMA encoder. This was 
introduced in 369f72fd65.
 2008-06-11 21:42:47 +03:00
Lasse Collin
0ea98e52ba Improve command line integer parsing a little in lzma and 
lzmadec to make them accept also KiB in addition Ki etc.
Fix also memory usage information in lzmadec --help.
 2008-06-11 15:08:44 +03:00
Lasse Collin
436fa5fae9 s/decompressed/compressed/ in the command line tool's 
error message.
 2008-06-10 20:36:12 +03:00
Lasse Collin
369f72fd65 Fix a buffer overflow in the LZMA encoder. It was due to my 
misunderstanding of the code. There's no tiny fix for this
problem, so I also cleaned up the code in general.

This reduces the speed of the encoder 2-5 % in the fastest
compression mode ("lzma -1"). High compression modes should
have no noticeable performance difference.

This commit breaks things (especially LZMA_SYNC_FLUSH) but I
will fix them once the new format and LZMA2 has been roughly
implemented. Plain LZMA won't support LZMA_SYNC_FLUSH at all
and won't be supported in the new .lzma format. This may
change still but this is what it looks like now.

Support for known uncompressed size (that is, LZMA or LZMA2
without EOPM) is likely to go away. This means there will
be API changes.
 2008-06-01 12:48:17 +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
11de5d5267 Bunch of grammar fixes from meyering. 2008-05-06 15:15:07 +03:00
Lasse Collin
dc192b6343 Typo fix 2008-05-06 13:41:05 +03:00
Lasse Collin
944b62b932 Don't print an error message on broken pipe unless --verbose 
is used.
 2008-05-04 22:29:27 +03:00
Lasse Collin
8e074349e4 Fix a crash with --format=alone if other filters than LZMA 
are specified on the command line.
 2008-04-30 22:16:17 +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
beeb810608 Prevent LZ encoder from hanging with known uncompressed 
size. The "fix" breaks LZMA_SYNC_FLUSH at end of stream
with known uncompressed size, but since it currently seems
likely that support for encoding with known uncompressed
size will go away anyway, I'm not fixing this problem now.
 2008-04-25 15:39:50 +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
8f804c29aa Bumped version number to 4.999.3alpha. It will become 5.0.0 
once we have a stable release (won't be very soon). The
version number is no longer related to version of LZMA SDK.

Made some small Automake-related changes to toplevel
Makefile.am and configure.ac.
 2008-04-25 13:32:35 +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
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
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
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
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