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| author | Christos Zoulas <christos@zoulas.com> | 2016-09-16 12:12:05 +0000 |
|---|---|---|
| committer | Christos Zoulas <christos@zoulas.com> | 2016-09-16 12:12:05 +0000 |
| commit | 734f5c0302e05eae45fee36a8babbf172ab00b49 (patch) | |
| tree | 3bc106af5a8c90f5881de77105aa0e7b705dd261 /magic | |
| parent | ecbaff4591511dc2d84a2c4f76c624830d2b34cc (diff) | |
| download | file-git-734f5c0302e05eae45fee36a8babbf172ab00b49.tar.gz | |
PR/573: Nick Terrell: Add zstd support
Diffstat (limited to 'magic')
| -rw-r--r-- | magic/Magdir/compress | 52 |
1 files changed, 51 insertions, 1 deletions
diff --git a/magic/Magdir/compress b/magic/Magdir/compress index 910545a7..3297d5dc 100644 --- a/magic/Magdir/compress +++ b/magic/Magdir/compress @@ -1,5 +1,5 @@ #------------------------------------------------------------------------------ -# $File: compress,v 1.65 2015/12/04 20:48:03 christos Exp $ +# $File: compress,v 1.66 2016/09/16 12:12:05 christos Exp $ # compress: file(1) magic for pure-compression formats (no archives) # # compress, gzip, pack, compact, huf, squeeze, crunch, freeze, yabba, etc. @@ -220,6 +220,56 @@ 0 lelong 0x184c2102 LZ4 compressed data (v0.1-v0.9) !:mime application/x-lz4 +# Zstandard/LZ4 skippable frames +# https://github.com/facebook/zstd/blob/dev/zstd_compression_format.md +0 lelong&0xFFFFFFF0 0x184D2A50 +>(4.l+8) indirect + +# Zstandard Dictionary ID subroutine +0 name zstd-dictionary-id +# Single Segment = True +>0 byte &0x20 \b, Dictionary ID: +>>0 byte&0x03 0 None +>>0 byte&0x03 1 +>>>1 byte x %u +>>0 byte&0x03 2 +>>>1 leshort x %u +>>0 byte&0x03 3 +>>>1 lelong x %u +# Single Segment = False +>0 byte ^0x20 \b, Dictionary ID: +>>0 byte&0x03 0 None +>>0 byte&0x03 1 +>>>2 byte x %u +>>0 byte&0x03 2 +>>>2 leshort x %u +>>0 byte&0x03 3 +>>>2 lelong x %u + +# Zstandard compressed data +# https://github.com/facebook/zstd/blob/dev/zstd_compression_format.md +0 lelong 0xFD2FB522 Zstandard compressed data (v0.2) +!:mime application/x-zstd +0 lelong 0xFD2FB523 Zstandard compressed data (v0.3) +!:mime application/x-zstd +0 lelong 0xFD2FB524 Zstandard compressed data (v0.4) +!:mime application/x-zstd +0 lelong 0xFD2FB525 Zstandard compressed data (v0.5) +!:mime application/x-zstd +0 lelong 0xFD2FB526 Zstandard compressed data (v0.6) +!:mime application/x-zstd +0 lelong 0xFD2FB527 Zstandard compressed data (v0.7) +!:mime application/x-zstd +>4 use zstd-dictionary-id +0 lelong 0xFD2FB528 Zstandard compressed data (v0.8+) +!:mime application/x-zstd +>4 use zstd-dictionary-id + +# https://github.com/facebook/zstd/blob/dev/zstd_compression_format.md +0 lelong 0xEC30A437 Zstandard dictionary +!:mime application/x-zstd-dictionary +>4 lelong x (ID %u) + # AFX compressed files (Wolfram Kleff) 2 string -afx- AFX compressed file data |