diff options
Diffstat (limited to 'magic/Magdir/compress')
| -rw-r--r-- | magic/Magdir/compress | 61 |
1 files changed, 57 insertions, 4 deletions
diff --git a/magic/Magdir/compress b/magic/Magdir/compress index beb8ebe..6fa8f32 100644 --- a/magic/Magdir/compress +++ b/magic/Magdir/compress @@ -1,5 +1,5 @@ #------------------------------------------------------------------------------ -# $File: compress,v 1.62 2014/09/13 14:27:12 christos Exp $ +# $File: compress,v 1.68 2017/05/25 20:07:23 christos Exp $ # compress: file(1) magic for pure-compression formats (no archives) # # compress, gzip, pack, compact, huf, squeeze, crunch, freeze, yabba, etc. @@ -188,6 +188,7 @@ >6 byte x version %d >7 byte x \b.%d !:mime application/x-7z-compressed +!:ext 7z/cb7 # Type: LZMA 0 lelong&0xffffff =0x5d @@ -201,6 +202,7 @@ # http://tukaani.org/xz/xz-file-format.txt 0 ustring \xFD7zXZ\x00 XZ compressed data +!:strength * 2 !:mime application/x-xz # https://github.com/ckolivas/lrzip/blob/master/doc/magic.header.txt @@ -218,6 +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 x + +# 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 @@ -257,7 +309,8 @@ !:mime application/x-qpress # Zlib https://www.ietf.org/rfc/rfc6713.txt -0 beshort%31 =0 ->0 byte&0xf =8 ->>0 byte&0x80 =0 zlib compressed data +0 string/b x +>0 beshort%31 =0 +>>0 byte&0xf =8 +>>>0 byte&0x80 =0 zlib compressed data !:mime application/zlib |