Commit Graph

1050 Commits

Author SHA1 Message Date
Jia Tan 85ea0979ad liblzma: Clarify comment in block.h. 2023-02-03 00:22:53 +08:00
Jia Tan 1f7ab90d9c liblzma: Improve documentation for block.h.
Standardizing each function to always specify params and return values.
Output pointer parameters are also marked with doxygen style [out] to
make it clear. Any note sections were also moved above the parameter and
return sections for consistency.
2023-02-03 00:22:53 +08:00
Jia Tan c563a4bc55 liblzma: Clarify a comment about LZMA_STR_NO_VALIDATION.
The flag description for LZMA_STR_NO_VALIDATION was previously confusing
about the treatment for filters than cannot be used with .xz format
(lzma1) without using LZMA_STR_ALL_FILTERS. Now, it is clear that
LZMA_STR_NO_VALIDATION is not a super set of LZMA_STR_ALL_FILTERS.
2023-02-01 23:39:45 +08:00
Lasse Collin 610dde15a8 xz: Use clock_gettime() even if CLOCK_MONOTONIC isn't available.
mythread.h and thus liblzma already does it.
2023-01-27 20:02:49 +02:00
Lasse Collin ff592c616e xz: Add SIGTSTP handler for progress indicator time keeping.
This way, if xz is stopped the elapsed time and estimated time
remaining won't get confused by the amount of time spent in
the stopped state.

This raises SIGSTOP. It's not clear to me if this is the correct way.
POSIX and glibc docs say that SIGTSTP shouldn't stop the process if
it is orphaned but this commit doesn't attempt to handle that.

Search for SIGTSTP in section 2.4.3:

https://pubs.opengroup.org/onlinepubs/9699919799/functions/V2_chap02.html
2023-01-27 19:37:47 +02:00
Lasse Collin af5a4bd5af tuklib_physmem: Check for __has_warning before GCC version.
Clang can be configured to fake a too high GCC version so
this way it's more robust.
2023-01-26 17:39:46 +02:00
Jia Tan f35d98e206 liblzma: Fix documentation in filter.h for lzma_str_to_filters()
The previous documentation for lzma_str_to_filters() was technically
correct, but misleading. lzma_str_to_filters() returns NULL on success,
which is in practice always defined to 0. This is the same value as
LZMA_OK, but lzma_str_to_filters() does not return lzma_ret so we should
be more clear.
2023-01-24 20:48:50 +08:00
Lasse Collin 2f78ecc593 Revert "tuklib_common: Define __has_warning if it is not defined."
This reverts commit 82e3c968bf.

Macros in the reserved namespace (_foo or __foo) shouldn't be #defined
without a very good reason. Here the alternative would have been
to #define tuklib_has_warning(str) to an approriate value.

Also the tuklib_* files should stay namespace clean if possible.
2023-01-24 20:20:51 +08:00
Lasse Collin 8366cf8738 tuklib_physmem: Clean up the way -Wcast-function-type is silenced on Windows.
__has_warning and other __has_foo macros are meant to become
compiler-agnostic so it's not good to check for __clang__ with it.

This also relied on tuklib_common.h for #defining __has_warning
which was confusing as #defining reserved macros is generally
not a good idea.
2023-01-24 20:20:40 +08:00
Lasse Collin 683a3c7e2f xz: Flip the return value of suffix_is_set to match the documentation.
Also edit style to match the existing coding style in the project.
2023-01-24 20:20:04 +08:00
Jia Tan cc5aa9ab13 xz: Refactor duplicated check for custom suffix when using --format=raw 2023-01-21 22:10:51 +08:00
Jia Tan 9663141274 liblzma: Set documentation on all reserved fields to private.
This prevents the reserved fields from being part of the generated
Doxygen documentation.
2023-01-21 21:37:48 +08:00
Jia Tan 6fcf4671b6 liblzma: Highlight liblzma API headers should not be included directly.
This improves the generated Doxygen HTML files to better highlight
how to properly use the liblzma API header files.
2023-01-20 00:51:12 +08:00
Jia Tan b43ff180fb tuklib_physmem: Silence warning from -Wcast-function-type on MinGW-w64.
tuklib_physmem depends on GetProcAddress() for both MSVC and MinGW-w64
to retrieve a function address. The proper way to do this is to cast the
return value to the type of function pointer retrieved. Unfortunately,
this causes a cast-function-type warning, so the best solution is to
simply ignore the warning.
2023-01-19 20:35:09 +08:00
Jia Tan 82e3c968bf tuklib_common: Define __has_warning if it is not defined.
clang supports the __has_warning macro to determine if the version of
clang compiling the code supports a given warning. If we do not define
it for other compilers, it may cause a preprocessor error.
2023-01-19 20:32:40 +08:00
Jia Tan d3e1147705 xz: Add missing comment for coder_set_compression_settings() 2023-01-16 21:35:45 +08:00
Jia Tan 123255b6ed xz: Do not set compression settings with raw format in list mode.
Calling coder_set_compression_settings() in list mode with verbose mode
on caused the filter chain and memory requirements to print. This was
unnecessary since the command results in an error and not consistent
with other formats like lzma and alone.
2023-01-16 20:55:10 +08:00
Lasse Collin 52dc033d0b xz: Use ssize_t for the to-be-ignored return value from write(fd, ptr, 1).
It makes no difference here as the return value fits into an int
too and it then gets ignored but this looks better.
2023-01-12 06:05:58 +02:00
Lasse Collin b1a6d180a3 xz: Silence warnings from -Wsign-conversion in a 32-bit build. 2023-01-12 06:01:12 +02:00
Lasse Collin 31c21c734b liblzma: Silence another warning from -Wsign-conversion in a 32-bit build.
It doesn't warn on a 64-bit system because truncating
a ptrdiff_t (signed long) to uint32_t is diagnosed under
-Wconversion by GCC and -Wshorten-64-to-32 by Clang.
2023-01-12 05:38:48 +02:00
Lasse Collin 37fbdfb726 liblzma: Silence a warning from -Wsign-conversion in a 32-bit build. 2023-01-12 04:46:45 +02:00
Lasse Collin 3f13bf6b9e liblzma: Silence warnings from clang -Wconditional-uninitialized.
This is similar to 2ce4f36f17.
The actual initialization of the variables is done inside
mythread_sync() macro. Clang doesn't seem to see that
the initialization code inside the macro is always executed.
2023-01-12 03:19:59 +02:00
Lasse Collin 6c886cc5b3 Fix warnings from clang -Wdocumentation. 2023-01-12 03:11:40 +02:00
Jia Tan d1561c47ec
xz: Fix warning -Wformat-nonliteral on clang in message.c.
clang and gcc differ in how they handle -Wformat-nonliteral. gcc will
allow a non-literal format string as long as the function takes its
format arguments as a va_list.
2023-01-11 22:46:48 +08:00
Lasse Collin 0b8fa310cf liblzma: CLMUL CRC64: Work around a bug in MSVC, second attempt.
This affects only 32-bit x86 builds. x86-64 is OK as is.

I still cannot easily test this myself. The reporter has tested
this and it passes the tests included in the CMake build and
performance is good: raw CRC64 is 2-3 times faster than the
C version of the slice-by-four method. (Note that liblzma doesn't
include a MSVC-compatible version of the 32-bit x86 assembly code
for the slice-by-four method.)

Thanks to Iouri Kharon for figuring out a fix, testing, and
benchmarking.
2023-01-10 22:15:55 +02:00
Lasse Collin cfabb62a48 Revert "liblzma: CLMUL CRC64: Workaround a bug in MSVC (VS2015-2022)."
This reverts commit 36edc65ab4.

It was reported that it wasn't a good enough fix and MSVC
still produced (different kind of) bad code when building
for 32-bit x86 if optimizations are enabled.

Thanks to Iouri Kharon.
2023-01-10 12:47:16 +02:00
Lasse Collin 0b64215170 sysdefs.h: Don't include strings.h anymore.
On some platforms src/xz/suffix.c may need <strings.h> for
strcasecmp() but suffix.c includes the header when it needs it.

Unless there is an old system that otherwise supports enough C99
to build XZ Utils but doesn't have C89/C90-compatible <string.h>,
there should be no need to include <strings.h> in sysdefs.h.
2023-01-10 11:56:11 +02:00
Lasse Collin ec2fc39fe4 xz: Include <strings.h> in suffix.c if needed for strcasecmp().
SUSv2 and POSIX.1‐2017 declare only a few functions in <strings.h>.
Of these, strcasecmp() is used on some platforms in suffix.c.
Nothing else in the project needs <strings.h> (at least if
building on a modern system).

sysdefs.h currently includes <strings.h> if HAVE_STRINGS_H is
defined and suffix.c relied on this.

Note that dos/config.h doesn't #define HAVE_STRINGS_H even though
DJGPP does have strings.h. It isn't needed with DJGPP as strcasecmp()
is also in <string.h> in DJGPP.
2023-01-10 11:23:41 +02:00
Lasse Collin 7049c4a76c sysdefs.h: Fix a comment. 2023-01-10 10:05:13 +02:00
Lasse Collin 194a5fab69 sysdefs.h: Don't include memory.h anymore even if it were available.
It quite probably was never needed, that is, any system where memory.h
was required likely couldn't compile XZ Utils for other reasons anyway.

XZ Utils 5.2.6 and later source packages were generated using
Autoconf 2.71 which no longer defines HAVE_MEMORY_H. So the code
being removed is no longer used anyway.
2023-01-10 10:04:06 +02:00
Lasse Collin 36edc65ab4 liblzma: CLMUL CRC64: Workaround a bug in MSVC (VS2015-2022).
I haven't tested with MSVC myself and there doesn't seem to be
information about the problem online, so I'm relying on the bug report.

Thanks to Iouri Kharon for the bug report and the patch.
2023-01-09 12:22:05 +02:00
Jia Tan 6fd39664de
Merge pull request #7 from tukaani-project/tuktest_index_hash
Tuktest index hash
2023-01-07 00:10:50 +08:00
Jia Tan 78e0561dfe Style: Change #if !defined() to #ifndef in mythread.h. 2023-01-06 20:43:31 +08:00
Jia Tan 84f9687cba liblzma: Remove common.h include from common/index.h.
common/index.h is needed by liblzma internally and tests. common.h will
include and define many things that are not needed by the tests. Also,
this prevents include order problems because common.h will redefine
LZMA_API resulting in a warning.
2023-01-05 20:57:25 +08:00
Lasse Collin 4103a2e78a Bump version and soname for 5.5.0alpha.
5.5.0alpha won't be released, it's just to mark that
the branch is not for stable 5.4.x.

Once again there is no API/ABI stability for new features
in devel versions. The major soname won't be bumped even
if API/ABI of new features breaks between devel releases.
2023-01-02 17:20:47 +02:00
Jia Tan bb740e3b11
Build: Only define HAVE_PROGRAM_INVOCATION_NAME if it is set to 1.
HAVE_DECL_PROGRAM_INVOCATION_NAME is renamed to
HAVE_PROGRAM_INVOCATION_NAME. Previously,
HAVE_DECL_PROGRAM_INVOCATION_NAME was always set when
building with autotools. CMake would only set this when it was 1, and the
dos/config.h did not define it. The new macro definition is consistent
across build systems.
2023-01-02 22:33:48 +08:00
Jia Tan f16e12d5e7 liblzma: Add NULL check to lzma_index_hash_append.
This is for consistency with lzma_index_append.
2023-01-02 22:20:04 +08:00
Jia Tan 203b008eb2 liblzma: Replaced hardcoded 0x0 index indicator byte with macro 2023-01-02 22:20:04 +08:00
Jia Tan 2fcba17fc4 xz: Includes <time.h> and <sys/time.h> conditionally in mytime.c.
Previously, mytime.c depended on mythread.h for <time.h> to be included.
2022-12-30 23:34:31 +08:00
Jia Tan f82294c831 liblzma: Includes sys/time.h conditionally in mythread
Previously, <sys/time.h> was always included, even if mythread only used
clock_gettime. <time.h> is still needed even if clock_gettime is not used
though because struct timespec is needed for mythread_condtime.
2022-12-30 23:34:31 +08:00
Jia Tan 74dae7d300 Build: No longer require HAVE_DECL_CLOCK_MONOTONIC to always be set.
Previously, if threading was enabled HAVE_DECL_CLOCK_MONOTONIC would always
be set to 0 or 1. However, this macro was needed in xz so if xz was not
built with threading and HAVE_DECL_CLOCK_MONOTONIC was not defined but
HAVE_CLOCK_GETTIME was, it caused a warning during build. Now,
HAVE_DECL_CLOCK_MONOTONIC has been renamed to HAVE_CLOCK_MONOTONIC and
will only be set if it is 1.
2022-12-30 23:34:31 +08:00
Jia Tan 1275ebfba7 liblzma: Update documentation for lzma_filter_encoder. 2022-12-30 23:34:31 +08:00
Jia Tan 5f7ce42a16 liblzma: Fix lzma_microlzma_encoder() return value.
Using return_if_error on lzma_lzma_lclppb_encode was improper because
return_if_error is expecting an lzma_ret value, but
lzma_lzma_lclppb_encode returns a boolean. This could result in
lzma_microlzma_encoder, which would be misleading for applications.
2022-12-30 23:34:31 +08:00
Lasse Collin 8fd225a2c1 liblzma: Update authors list in arm64.c. 2022-12-16 18:30:02 +02:00
Lasse Collin b69da6d4bb Bump version to 5.4.0 and soname to 5.4.0. 2022-12-13 20:46:41 +02:00
Lasse Collin 854f2f5946 xz: Rename --experimental-arm64 to --arm64. 2022-12-11 21:13:57 +02:00
Lasse Collin 31dbd1e5fb liblzma: Change LZMA_FILTER_ARM64 to the official Filter ID 0x0A. 2022-12-11 21:13:06 +02:00
Lasse Collin 01b3549e52 xz: Make args_info.files_name a const pointer. 2022-12-08 19:24:22 +02:00
Lasse Collin bc665b84ea xz: Don't modify argv[].
The code that parses --memlimit options and --block-list modified
the argv[] when parsing the option string from optarg. This was
visible in "ps auxf" and such and could be confusing. I didn't
understand it back in the day when I wrote that code. Now a copy
is allocated when modifiable strings are needed.
2022-12-08 19:18:16 +02:00
Lasse Collin ac2a747e93 liblzma: Check for unexpected NULL pointers in block_header_decode().
The API docs gave an impression that such checks are done
but they actually weren't done. In practice it made little
difference since the calling code has a bug if these are NULL.

Thanks to Jia Tan for the original patch that checked for
block->filters == NULL.
2022-12-08 17:30:09 +02:00
Lasse Collin 24790f49ae Bump version number for 5.3.5beta.
This also sorts the symbol names alphabetically in liblzma_*.map.
2022-12-01 20:59:32 +02:00
Lasse Collin 62b270988e liblzma: Use __has_attribute(__symver__) to fix Clang detection.
If someone sets up Clang to define __GNUC__ to 10 or greater
then symvers broke. __has_attribute is supported by such GCC
and Clang versions that don't support __symver__ so this should
be much better and simpler way to detect if __symver__ is
actually supported.

Thanks to Tomasz Gajc for the bug report.
2022-12-01 20:55:21 +02:00
Lasse Collin f9ca7d4516 liblzma: Omit zero-skipping from ARM64 filter.
It has some complicated downsides and its usefulness is more limited
than I originally thought. So this change is bad for certain very
specific situations but a generic solution that works for other
filters (and is otherwise better too) is planned anyway. And this
way 7-Zip can use the same compatible filter for the .7z format.

This is still marked as experimental with a new temporary Filter ID.
2022-12-01 18:55:00 +02:00
Lasse Collin 5baec3f0a9 xz: Omit the special notes about ARM64 filter on the man page. 2022-12-01 18:13:27 +02:00
Lasse Collin 0c3627b518 liblzma: Don't be over-specific in lzma_str_to_filters API doc. 2022-12-01 18:12:03 +02:00
Lasse Collin 94adf057f2 liblzma: Silence unused variable warning when BCJ filters are disabled.
Thanks to Jia Tan for the original patch.
2022-12-01 17:54:23 +02:00
Jia Tan 7c16e312cb xz: Remove message_filters_to_str function prototype from message.h.
This was forgotten from 7484744af6.
2022-11-30 18:12:35 +02:00
Jia Tan 0a72b9ca2f liblzma: Improve documentation for string to filter functions. 2022-11-29 22:29:15 +02:00
Lasse Collin a6e21fcede liblzma: Two fixes to lzma_str_list_filters() API docs.
Thanks to Jia Tan.
2022-11-29 22:27:42 +02:00
Lasse Collin 7484744af6 xz: Use lzma_str_from_filters().
Two uses: Displaying encoder filter chain when compressing with -vv,
and displaying the decoder filter chain in --list -vv.
2022-11-28 22:05:32 +02:00
Lasse Collin cedeeca2ea liblzma: Add lzma_str_to_filters, _from_filters, and _list_filters.
lzma_str_to_filters() uses static error messages which makes
them not very precise. It tells the position in the string
where an error occurred though which helps quite a bit if
applications take advantage of it. Dynamic error messages can
be added later with a new flag if it seems important enough.
2022-11-28 21:54:24 +02:00
Lasse Collin 072ebf7b13 liblzma: Make lzma_validate_chain() available outside filter_common.c. 2022-11-28 21:02:19 +02:00
Lasse Collin 5f22bd2d37 liblzma: Remove lzma_lz_decoder_uncompressed() as it's now unused. 2022-11-28 10:51:03 +02:00
Lasse Collin cee8320646 liblzma: Use LZMA1EXT feature in lzma_microlzma_decoder().
Here too this avoids the slightly ugly method to set
the uncompressed size.

Also moved the setting of dict_size to the struct initializer.
2022-11-28 10:48:53 +02:00
Lasse Collin e310e8b6a4 liblzma: Use LZMA1EXT feature in lzma_alone_decoder().
This avoids the need to use the slightly ugly method to
set the uncompressed size.
2022-11-28 10:28:20 +02:00
Lasse Collin 33b8a24b66 liblzma: Add LZMA_FILTER_LZMA1EXT to support LZMA1 without end marker.
Some file formats need support for LZMA1 streams that don't use
the end of payload marker (EOPM) alias end of stream (EOS) marker.
So far liblzma API has supported decompressing such streams via
lzma_alone_decoder() when .lzma header specifies a known
uncompressed size. Encoding support hasn't been available in the API.

Instead of adding a new LZMA1-only API for this purpose, this commit
adds a new filter ID for use with raw encoder and decoder. The main
benefit of this approach is that then also filter chains are possible,
for example, if someone wants to implement support for .7z files that
use the x86 BCJ filter with LZMA1 (not BCJ2 as that isn't supported
in liblzma).
2022-11-27 23:16:21 +02:00
Lasse Collin 9a304bf1e4 liblzma: Avoid unneeded use of void pointer in LZMA decoder. 2022-11-27 18:43:07 +02:00
Lasse Collin 218394958c liblzma: Pass the Filter ID to LZ encoder and decoder.
This allows using two Filter IDs with the same
initialization function and data structures.
2022-11-27 18:20:33 +02:00
Lasse Collin 1663c7676b liblzma: Remove two FIXME comments. 2022-11-27 01:03:16 +02:00
Lasse Collin 11fe708db7 xz: Use lzma_filters_free(). 2022-11-26 22:25:30 +02:00
Lasse Collin e782af9110 liblzma: Use lzma_filters_free() in more places. 2022-11-26 22:21:13 +02:00
Lasse Collin 90caaded2d liblzma: Omit simple coder init functions if they are disabled. 2022-11-25 18:04:37 +02:00
Lasse Collin 5cd9f0df78 xz: Allow nice_len 2 and 3 even if match finder requires 3 or 4.
Now that liblzma accepts these, we avoid the extra check and
there's one message less for translators too.
2022-11-24 23:24:59 +02:00
Lasse Collin 3be88ae071 liblzma: Allow nice_len 2 and 3 even if match finder requires 3 or 4.
That is, if the specified nice_len is smaller than the minimum
of the match finder, silently use the match finder's minimum value
instead of reporting an error. The old behavior is annoying to users
and it complicates xz options handling too.
2022-11-24 23:23:55 +02:00
Lasse Collin 93439cfafe liblzma: Add lzma_filters_update() support to the multi-threaded encoder.
A tiny downside of this is that now a 1-4 tiny allocations are made
for every Block because each worker thread needs its own copy of
the filter chain.
2022-11-24 16:25:10 +02:00
Lasse Collin 06824396b2 Build: Don't put GNU/Linux-specific symbol versions into static liblzma.
It not only makes no sense to put symbol versions into a static library
but it can also cause breakage.

By default Libtool #defines PIC if building a shared library and
doesn't define it for static libraries. This is documented in the
Libtool manual. It can be overriden using --with-pic or --without-pic.
configure.ac detects if --with-pic or --without-pic is used and then
gives an error if neither --disable-shared nor --disable-static was
used at the same time. Thus, in normal situations it works to build
both shared and static library at the same time on GNU/Linux,
only --with-pic or --without-pic requires that only one type of
library is built.

Thanks to John Paul Adrian Glaubitz from Debian for reporting
the problem that occurred on ia64:
https://www.mail-archive.com/xz-devel@tukaani.org/msg00610.html
2022-11-24 14:52:44 +02:00
Lasse Collin e1acf71072 liblzma: Refactor to use lzma_filters_free().
lzma_filters_free() sets the options to NULL and ids to
LZMA_VLI_UNKNOWN so there is no need to do it by caller;
the filter arrays will always be left in a safe state.

Also use memcpy() instead of a loop to copy a filter chain
when it is known to be safe to copy LZMA_FILTERS_MAX + 1
(even if the elements past the terminator might be uninitialized).
2022-11-24 01:32:16 +02:00
Lasse Collin cb05dbcf8b liblzma: Fix another invalid free() after memory allocation failure.
This time it can happen when lzma_stream_encoder_mt() is used
to reinitialize an existing multi-threaded Stream encoder
and one of 1-4 tiny allocations in lzma_filters_copy() fail.

It's very similar to the previous bug
10430fbf38, happening with
an array of lzma_filter structures whose old options are freed
but the replacement never arrives due to a memory allocation
failure in lzma_filters_copy().
2022-11-24 01:26:37 +02:00
Jia Tan 75f1a6c26d liblzma: Add support for LZMA_SYNC_FLUSH in the Block encoder.
The documentation mentions that lzma_block_encoder() supports
LZMA_SYNC_FLUSH but it was never added to supported_actions[]
in the internal structure. Because of this, LZMA_SYNC_FLUSH could
not be used with the Block encoder unless it was the next coder
after something like stream_encoder() or stream_encoder_mt().
2022-11-24 01:07:32 +02:00
Lasse Collin d090164517 liblzma: Add new API function lzma_filters_free().
This is small but convenient and should have been added
a long time ago.
2022-11-24 01:02:50 +02:00
Lasse Collin 48c1b99dc5 liblzma: Add lzma_attr_warn_unused_result to lzma_filters_copy(). 2022-11-23 21:55:22 +02:00
Lasse Collin 10430fbf38 liblzma: Fix invalid free() after memory allocation failure.
The bug was in the single-threaded .xz Stream encoder
in the code that is used for both re-initialization and for
lzma_filters_update(). To trigger it, an application had
to either re-initialize an existing encoder instance with
lzma_stream_encoder() or use lzma_filters_update(), and
then one of the 1-4 tiny allocations in lzma_filters_copy()
(called from stream_encoder_update()) must fail. An error
was correctly reported but the encoder state was corrupted.

This is related to the recent fix in
f8ee61e74e which is good but
it wasn't enough to fix the main problem in stream_encoder.c.
2022-11-23 21:26:21 +02:00
Lasse Collin cafd6dc397 liblzma: Fix language in a comment. 2022-11-22 16:37:15 +02:00
Lasse Collin c392bf8ccb liblzma: Fix infinite loop in LZMA encoder init with dict_size >= 2 GiB.
The encoder doesn't support dictionary sizes larger than 1536 MiB.
This is validated, for example, when calculating the memory usage
via lzma_raw_encoder_memusage(). It is also enforced by the LZ
part of the encoder initialization. However, LZMA encoder with
LZMA_MODE_NORMAL did an unsafe calculation with dict_size before
such validation and that results in an infinite loop if dict_size
was 2 << 30 or greater.
2022-11-22 11:23:23 +02:00
Lasse Collin f50534c973 liblzma: Fix two Doxygen commands in the API headers.
These were caught by clang -Wdocumentation.
2022-11-21 13:02:33 +02:00
Lasse Collin 649d4872ed xz: Refactor duplicate code from hardware_memlimit_mtenc_get(). 2022-11-19 19:09:55 +02:00
Lasse Collin d327743bb5 xz: Add support --threads=+N so that -T+1 gives threaded mode. 2022-11-19 19:06:13 +02:00
Lasse Collin b9a67d9a5f Bump version number for 5.3.4alpha. 2022-11-15 11:18:28 +02:00
Lasse Collin b56bc8251d Revert "liblzma: Simple/BCJ filters: Allow disabling generic BCJ options."
This reverts commit 177bdc922c
and also does equivalent change to arm64.c.

Now that ARM64 filter will use lzma_options_bcj, this change
is not needed anymore.
2022-11-14 23:19:57 +02:00
Lasse Collin 8370ec8edf Replace the experimental ARM64 filter with a new experimental version.
This is incompatible with the previous version.

This has space/tab fixes in filter_*.c and bcj.h too.
2022-11-14 23:16:38 +02:00
Lasse Collin f644473a21 liblzma: Add fast CRC64 for 32/64-bit x86 using SSSE3 + SSE4.1 + CLMUL.
It also works on E2K as it supports these intrinsics.

On x86-64 runtime detection is used so the code keeps working on
older processors too. A CLMUL-only build can be done by using
-msse4.1 -mpclmul in CFLAGS and this will reduce the library
size since the generic implementation and its 8 KiB lookup table
will be omitted.

On 32-bit x86 this isn't used by default for now because by default
on 32-bit x86 the separate assembly file crc64_x86.S is used.
If --disable-assembler is used then this new CLMUL code is used
the same way as on 64-bit x86. However, a CLMUL-only build
(-msse4.1 -mpclmul) won't omit the 8 KiB lookup table on
32-bit x86 due to a currently-missing check for disabled
assembler usage.

The configure.ac check should be such that the code won't be
built if something in the toolchain doesn't support it but
--disable-clmul-crc option can be used to unconditionally
disable this feature.

CLMUL speeds up decompression of files that have compressed very
well (assuming CRC64 is used as a check type). It is know that
the CLMUL code is significantly slower than the generic code for
tiny inputs (especially 1-8 bytes but up to 16 bytes). If that
is a real-world problem then there is already a commented-out
variant that uses the generic version for small inputs.

Thanks to Ilya Kurdyukov for the original patch which was
derived from a white paper from Intel [1] (published in 2009)
and public domain code from [2] (released in 2016).

[1] https://www.intel.com/content/dam/www/public/us/en/documents/white-papers/fast-crc-computation-generic-polynomials-pclmulqdq-paper.pdf
[2] https://github.com/rawrunprotected/crc
2022-11-14 23:05:46 +02:00
Lasse Collin eb0f1450ad liblzma: Use __attribute__((__constructor__)) if available.
This uses it for CRC table initializations when using --disable-small.
It avoids mythread_once() overhead. It also means that then
--disable-small --disable-threads is thread-safe if this attribute
is supported.
2022-11-14 16:00:52 +02:00
Lasse Collin a39961ef21 liblzma: Fix building with Intel ICC (the classic compiler).
It claims __GNUC__ >= 10 but doesn't support __symver__ attribute.

Thanks to Stephen Sachs.
2022-11-11 17:15:25 +02:00
Lasse Collin c715f683dc liblzma: Fix incorrect #ifdef for x86 SSE2 support.
__SSE2__ is the correct macro for SSE2 support with GCC, Clang,
and ICC. __SSE2_MATH__ means doing floating point math with SSE2
instead of 387. Often the latter macro is defined if the first
one is but it was still a bug.
2022-11-11 14:35:58 +02:00
Lasse Collin 3c7860cf49 xzdiff: Add support for .lz files.
The other scripts don't need changes for .lz support because
in those scripts it is enough that xz supports .lz.
2022-11-11 13:16:21 +02:00
Lasse Collin d76c752a6d Scripts: Ignore warnings from xz.
In practice this means making the scripts work when
the input files have an unsupported check type which
isn't a problem in practice unless support for
some check types has been disabled at build time.
2022-11-11 12:23:58 +02:00
Lasse Collin 0918159ce4 xz: Update the man page about BCJ filters, including upcoming --arm64.
The --arm64 isn't actually implemented yet in the form
described in this commit.

Thanks to Jia Tan.
2022-11-09 19:09:26 +02:00
Lasse Collin ba2ae3596f xz: Add --arm64 to --long-help and omit endianness from ARM(-Thumb).
Modern 32-bit ARM in big endian mode use little endian for
instruction encoding still, so the filters work on such
executables too. It's likely less confusing for users this way.

The --arm64 option hasn't been implemented yet (there is
--experimental-arm64 but it's different). The --arm64 option
is added now anyway because this is the likely result and the
strings need to be ready for translators.

Thanks to Jia Tan.
2022-11-09 18:14:14 +02:00
Lasse Collin 731db13e6f xz: Remove the commented-out FORMAT_GZIP, gzip, .gz, and .tgz. 2022-11-09 14:31:10 +02:00
Lasse Collin 3176f992c5 xz: Add .lz (lzip) decompression support.
If configured with --disable-lzip-decoder then --long-help will
still list `lzip' in --format but I left it like that since
due to translations it would be messy to have two help strings.
Features are disabled only in special situations so wrong help
in such a situation shouldn't matter much.

Thanks to Michał Górny for the original patch.
2022-11-09 14:28:41 +02:00