xz.git - XZ Utils

Age	Commit message (Collapse)	Author	Files	Lines
2023-10-21	liblzma: Move is_clmul_supported() back to crc_common.h.	Jia Tan	1	-1/+1
	This partially reverts creating crc_clmul.c (8c0f9376f58c0696d5d6719705164d35542dd891) where is_clmul_supported() was moved, extern'ed, and renamed to lzma_is_clmul_supported(). This caused a problem when the function call to lzma_is_clmul_supported() results in a call through the PLT. ifunc resolvers run very early in the dynamic loading sequence, so the PLT may not be setup properly at this point. Whether the PLT is used or not for lzma_is_clmul_supported() depened upon the compiler-toolchain used and flags. In liblzma compiled with GCC, for instance, GCC will go through the PLT for function calls internal to liblzma if the version scripts and symbol visibility hiding are not used. If lazy-binding is disabled, then it would have made any program linked with liblzma fail during dynamic loading in the ifunc resolver.
2023-10-18	liblzma: Refactor CRC comments.	Jia Tan	1	-19/+45
	A detailed description of the three dispatch methods was added. Also, duplicated comments now only appear in crc32_fast.c or were removed from both crc32_fast.c and crc64_fast.c if they appeared in crc_clmul.c.
2023-10-18	liblzma: Create crc_clmul.c.	Jia Tan	1	-116/+4
	Both crc32_clmul() and crc64_clmul() are now exported from crc32_clmul.c as lzma_crc32_clmul() and lzma_crc64_clmul(). This ensures that is_clmul_supported() (now lzma_is_clmul_supported()) is not duplicated between crc32_fast.c and crc64_fast.c. Also, it encapsulates the complexity of the CLMUL implementations into a single file and reduces the complexity of crc32_fast.c and crc64_fast.c. Before, CLMUL code was present in crc32_fast.c, crc64_fast.c, and crc_common.h. During the conversion, various cleanups were applied to code (thanks to Lasse Collin) including: - Require using semicolons with MASK_/L/H/LH macros. - Variable typing and const handling improvements. - Improvements to comments. - Fixes to the pragmas used. - Removed unneeded variables. - Whitespace improvements. - Fixed CRC_USE_GENERIC_FOR_SMALL_INPUTS handling. - Silenced warnings and removed the need for some #pragmas
2023-10-18	liblzma: Define CRC_USE_IFUNC in crc_common.h.	Jia Tan	1	-2/+1
	When ifunc is supported, we can define a simpler macro instead of repeating the more complex check in both crc32_fast.c and crc64_fast.c.
2023-10-13	liblzma: Added crc32_clmul to crc32_fast.c.	Hans Jansen	1	-7/+240

2023-10-13	liblzma: Rename crc_macros.h to crc_common.h.	Hans Jansen	1	-1/+1

2019-12-31	Rename read32ne to aligned_read32ne, and similarly for the others.	Lasse Collin	1	-2/+2
	Using the aligned methods requires more care to ensure that the address really is aligned, so it's nicer if the aligned methods are prefixed. The next commit will remove the unaligned_ prefix from the unaligned methods which in liblzma are used in more places than the aligned ones.
2014-01-12	Fix typos in comments.	Lasse Collin	1	-1/+1

2009-11-22	Add missing consts to pointer casts.	Lasse Collin	1	-2/+2

2009-10-04	Use a tuklib module for integer handling.	Lasse Collin	1	-2/+2
	This replaces bswap.h and integer.h. The tuklib module uses <byteswap.h> on GNU, <sys/endian.h> on *BSDs and <sys/byteorder.h> on Solaris, which may contain optimized code like inline assembly.
2009-04-13	Put the interesting parts of XZ Utils into the public domain.	Lasse Collin	1	-18/+12
	Some minor documentation cleanups were made at the same time.
2009-02-02	Modify LZMA_API macro so that it works on Windows with	Lasse Collin	1	-1/+1
	other compilers than MinGW. This may hurt readability of the API headers slightly, but I don't know any better way to do this.
2008-12-31	Remove lzma_init() and other init functions from liblzma API.	Lasse Collin	1	-0/+88
	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.