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Diffstat (limited to '')
| -rw-r--r-- | tests/files/README | 30 |
1 files changed, 18 insertions, 12 deletions
diff --git a/tests/files/README b/tests/files/README index 119cac4..584e6ba 100644 --- a/tests/files/README +++ b/tests/files/README @@ -1,6 +1,6 @@ -.xz and .lzma Test Files ------------------------- +.xz, .lzma, and .lz Test Files +------------------------------ 0. Introduction @@ -8,7 +8,8 @@ .lzma (LZMA_Alone), and .lz (lzip) files in decoder implementations. Many of the files have been created by hand with a hex editor, thus there is no better "source code" than the files themselves. All the - test files and this README have been put into the public domain. + test files and this README may be distributed under the terms of + the BSD Zero Clause License (0BSD). 1. File Types @@ -65,20 +66,25 @@ good-1-delta-lzma2.tiff.xz is an image file that compresses better with Delta+LZMA2 than with plain LZMA2. - good-1-x86-lzma2.xz uses the x86 filter (BCJ) and LZMA2. The - uncompressed file is compress_prepared_bcj_x86 found from the tests - directory. - - good-1-sparc-lzma2.xz uses the SPARC filter and LZMA2. The - uncompressed file is compress_prepared_bcj_sparc found from the tests - directory. - good-1-arm64-lzma2-1.xz uses the ARM64 filter and LZMA2. The uncompressed data is constructed so that it tests integer - wrap around and sign extension. + wrap around and sign extension. To recreate the file, compress + using XZ Utils 5.4.x (newer may or may not work too): + + ./debug/testfilegen-arm64 \ + | xz -T1 -Ccrc32 --arm64 \ + --lzma2=dict=64KiB,lp=2,lc=2 \ + > good-1-arm64-lzma2-1.xz good-1-arm64-lzma2-2.xz is like good-1-arm64-lzma2-1.xz but with non-zero start offset. XZ Embedded doesn't support this file. + To recreate the file, compress using XZ Utils 5.4.x (newer may or + may not work too): + + ./debug/testfilegen-arm64 \ + | xz -T1 -Ccrc32 --arm64=start=4294963200 \ + --lzma2=dict=64KiB,lp=2,lc=2 \ + > good-1-arm64-lzma2-2.xz good-1-lzma2-1.xz has two LZMA2 chunks, of which the second sets new properties. |