Commit Graph

2266 Commits

Author SHA1 Message Date
Lasse Collin e290a72d6d liblzma: Clarify a comment. 2024-02-14 18:31:16 +02:00
Lasse Collin 5e04706b91 liblzma: LZMA decoder: Optimize loop comparison.
But now it needs one more local variable.
2024-02-14 18:31:16 +02:00
Lasse Collin 88276f9f2c liblzma: Optimize literal_subcoder() macro slightly. 2024-02-14 18:31:16 +02:00
Lasse Collin 5938f6de4d liblzma: LZ decoder: Add unlikely(). 2024-02-14 18:31:16 +02:00
Lasse Collin 9c252e3ed0 liblzma: LZ decoder: Remove a useless unlikely(). 2024-02-14 18:31:16 +02:00
Lasse Collin f3872a5947 liblzma: Optimize LZ decoder slightly.
Now extra buffer space is reserved so that repeating bytes for
any single match will never need to copy from two places (both
the beginning and the end of the buffer). This simplifies
dict_repeat() and helps a little with speed.

This seems to reduce .lzma decompression time about 2 %, so
with .xz and CRC it could be slightly less. The small things
add up still.
2024-02-14 18:31:16 +02:00
Lasse Collin eb518446e5 liblzma: LZMA decoder: Get rid of next_state[].
It's not completely obvious if this is better in the decoder.
It should be good if compiler can avoid creating a branch
(like using CMOV on x86).

This also makes lzma_encoder.c use the new macros.
2024-02-14 18:31:16 +02:00
Lasse Collin e0c0ee475c liblzma: LZMA decoder improvements.
This adds macros for bittree decoding which prepares the code
for alternative C versions and inline assembly.
2024-02-14 18:31:16 +02:00
Jia Tan de5c5e4176 liblzma: Creates Non-resumable and Resumable modes for lzma_decoder.
The new decoder resumes the first decoder loop in the Resumable mode.
Then, the code executes in Non-resumable mode until it detects that it
cannot guarantee to have enough input/output to decode another symbol.

The Resumable mode is how the decoder has always worked. Before decoding
every input bit, it checks if there is enough space and will save its
location to be resumed later. When the decoder has more input/output,
it jumps back to the correct sequence in the Resumable mode code.

When the input/output buffers are large, the Resumable mode is much
slower than the Non-resumable because it has more branches and is harder
for the compiler to optimize since it is in a large switch block.

Early benchmarking shows significant time improvement (8-10% on gcc and
clang x86) by using the Non-resumable code as much as possible.
2024-02-14 18:31:16 +02:00
Jia Tan e446ab7a18 liblzma: Creates separate "safe" range decoder mode.
The new "safe" range decoder mode is the same as old range decoder, but
now the default behavior of the range decoder will not check if there is
enough input or output to complete the operation. When the buffers are
close to fully consumed, the "safe" operations must be used instead. This
will improve speed because it will reduce the number of branches needed
for most of the range decoder operations.
2024-02-14 18:31:16 +02:00
Lasse Collin 7f6d9ca329 doxygen/footer.html: Add missing closing tags and don't open a new tab.
The footer template from Doxygen has the closing </body> </html>
as Doxygen doesn't add them otherwise.

target="_blank" was omitted as it's not useful here but
it can be slightly annoying as one cannot just go back
in the browser history.

Since the footer links to the license file in the same
directory and not to CC website, the rel attributes
can be omitted.
2024-02-14 18:31:16 +02:00
Lasse Collin 26d1527d34 Tweak the expressions in AUTHORS. 2024-02-14 18:31:16 +02:00
Lasse Collin d231d56580 Translations: Add the man page translators into man page header comment.
It looked odd to only have the original English authors listed
in the header comments of the translated files.
2024-02-14 18:31:16 +02:00
Lasse Collin 6d35fcb936 Translations: Translate also messages of lzmainfo.
lzmainfo has had translation support since 2009 at least but
it was never added to po/POTFILES.in so the messages weren't
translated. It's a very rarely needed tool so it's not too bad.

This also adds src/xz/mytime.c to po/POTFILES.in although there
are no translatable strings. It's simpler this way so that it
won't be forgotten if strings were ever added to that file.
2024-02-14 18:31:16 +02:00
Lasse Collin a9f369dd54 Translations: Add custom .pot header with SPDX license identifier.
The same is used for both po/xz.pot and po4a/xz-man.pot.
2024-02-14 18:31:16 +02:00
Lasse Collin 469cd6653b Translations: po4a/update-po: Add copyright notice to xz-man.pot.
All man pages are under 0BSD now so this is simple now.
2024-02-14 18:31:16 +02:00
Lasse Collin 28ce45e38f Update COPYING about the man pages of the scripts. 2024-02-14 18:31:16 +02:00
Lasse Collin e48287bf51 xzdiff, xzgrep, and xzmore: Rewrite the man pages.
The main reason is a kind of silly one:

xz-man.pot contains strings from all man pages in XZ Utils.
The man pages of xzdiff, xzgrep, and xzmore were under GPLv2
and the rest under 0BSD. Thus xz-man.pot contained strings
under two licences. po4a creates the translated man pages
from the combined 0BSD+GPLv2 xz-man.pot.

I haven't liked this mixing in xz-man.pot but the
Translation Project requires that all man pages must be
in the same .pot file. So a separate xz-man-gpl.pot
wasn't an option.

Since these man pages are short, rewriting them was quick enough.
Now xz-man.pot is entirely under 0BSD and marking the per-file
licenses is simpler.

As a bonus, some wording hopefully is now slightly better
although it's perhaps a matter of taste.

NOTE: In xzgrep.1, the EXIT STATUS section was written by me
in the commit d796b6d7fd so that's
why that section could be taken as is from the old xzgrep.1.
2024-02-14 18:31:16 +02:00
Lasse Collin 3e551b111b xzless: Update man page slightly.
The xz tool can decompress three file formats and xzless
has always supported uncompressed files too.
2024-02-14 18:31:16 +02:00
Lasse Collin 40f36da226 Translations: Change po/Makevars to add a copyright notice to po/xz.pot. 2024-02-14 18:31:16 +02:00
Lasse Collin 24192854e2 Translations: Update po/Makevars to use the template from gettext 0.22.4.
Also add SPDX license identifier now that there is a known license.
2024-02-14 18:31:16 +02:00
Lasse Collin b941549573 liblzma: Include the SPDX license identifier 0BSD to generated files.
Perhaps the generated files aren't even copyrightable but
using the same license for them as for the rest of the liblzma
keeps things more consistent for tools that look for license info.
2024-02-14 18:31:16 +02:00
Lasse Collin 8e4ec79483 liblzma: Fix compilation of price_tablegen.c.
It is built and run only manually so this didn't matter
unless one wanted to regenerate the price_table.c.
2024-02-14 18:31:16 +02:00
Lasse Collin e99bff3ffb Add SPDX license identifiers to GPL, LGPL, and FSFULLR files. 2024-02-14 18:31:16 +02:00
Lasse Collin 22af94128b Add SPDX license identifier into 0BSD source code files. 2024-02-14 18:31:16 +02:00
Lasse Collin 23de53421e liblzma: Sync the AUTHORS fix about SHA-256 to lzma.h. 2024-02-14 18:31:16 +02:00
Lasse Collin 689e0228ba Change most public domain parts to 0BSD.
Translations and doc/xz-file-format.txt and doc/lzma-file-format.txt
were not touched.

COPYING.0BSD was added.
2024-02-14 18:31:12 +02:00
Lasse Collin 76946dc433 Fix SHA-256 authors.
The initial commit 5d018dc035
in 2007 had a comment in sha256.c that the code is based on
Crypto++ Library 5.5.1. In 2009 the Authors list in sha256.c
and the AUTHORS file was updated with information that the
code had come from Crypto++ but via 7-Zip. I know I had viewed
7-Zip's SHA-256 code but back then the C code has been identical
enough with Crypto++, so I don't why I thought the author info
would need that extra step via 7-Zip for this single file.

Another error is that I had mixed sha.* and shacal2.* files
when checking for author info in Crypto++. The shacal2.* files
aren't related to liblzma's sha256.c and thus Kevin Springle's
code in Crypto++ isn't either.
2024-02-14 15:23:00 +02:00
Lasse Collin 21d9cbae9e Remove macosx/build.sh.
It was last updated in 2013.
2024-02-14 15:23:00 +02:00
Lasse Collin eac2c3c67f Doc: Remove doc/examples_old.
It was good to keep these around in parallel with the newer examples
but I think it's OK to remove the old ones at this point.
2024-02-14 15:23:00 +02:00
Jia Tan 89ea1a22f4 Tests: Add RISC-V filter support in a few places. 2024-02-13 23:33:27 +08:00
Jia Tan 45663443eb liblzma: Fix build error if only RISC-V BCJ filter is enabled.
If any other BCJ filter was enabled for encoding or decoding, then this
was not a problem.
2024-02-13 23:33:21 +08:00
Jia Tan 2f15597d67 Translations: Update the Korean translation. 2024-02-13 23:26:55 +08:00
Jia Tan df873143ad Translations: Update the Korean man page translations. 2024-02-13 01:55:53 +08:00
Jia Tan b3f415eddb Translations: Update the Chinese (simplified) translation. 2024-02-13 01:53:33 +08:00
Lasse Collin 9860d418d2 xzless: Use ||- in LESSOPEN with with "less" 451 and newer. 2024-02-09 23:21:01 +02:00
Lasse Collin fd0692b052 xzless: Use --show-preproc-errors with "less" 632 and newer.
This makes "less" show a warning if a decompression error occurred.
2024-02-09 23:00:05 +02:00
Jia Tan adb073da76 liblzma: Fix typo discovered by codespell. 2024-02-09 23:59:54 +08:00
Jia Tan 55d9fc883d Translations: Update the Swedish translation. 2024-02-09 20:01:06 +08:00
Jia Tan 55ba4a1ea3 Translations: Update the Spanish translation. 2024-02-08 20:09:04 +08:00
Jia Tan 7f2293cd80 Translations: Update the Spanish translation. 2024-02-07 21:34:35 +08:00
Jia Tan f4af2036bc Translations: Update the Polish translation. 2024-02-07 21:28:32 +08:00
Jia Tan e5e93bb816 Translations: Update the German translation. 2024-02-07 19:40:12 +08:00
Jia Tan 28f18ff8e2 Translations: Update the German man page translations. 2024-02-07 19:27:25 +08:00
Jia Tan cabfbc7947 Translations: Update the Romanian translation. 2024-02-06 23:44:06 +08:00
Jia Tan bf20c94f5d Translations: Update the Romanian man page translations. 2024-02-06 23:45:02 +08:00
Jia Tan 7c25ec9feb Translations: Update the Ukrainian translation. 2024-02-07 20:56:57 +08:00
Jia Tan b3523250e9 Translations: Update the Ukrainian man page translations. 2024-02-06 23:30:03 +08:00
Jia Tan a5c177f514 Update AUTHORS. 2024-02-02 01:39:28 +08:00
Jia Tan 7f68a68c19 liblzma: Update Authors list in crc32_arm64.h. 2024-02-02 01:38:51 +08:00