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70 commits

Author SHA1 Message Date
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
bfde3b24a5 Apply a minor speed optimization to LZMA decoder. 2008-03-11 15:35:34 +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
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
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
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
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
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
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
3599dba957 More fixes to LZMA decoder's flush marker handling. 2008-01-14 11:54:56 +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
5d018dc035 Imported to git. 2007-12-09 00:42:33 +02:00