-# $OpenBSD: compress,v 1.6 2009/04/24 18:54:34 chl Exp $
+# $OpenBSD: compress,v 1.7 2015/10/05 22:36:23 nicm Exp $
#------------------------------------------------------------------------------
# compress: file(1) magic for pure-compression formats (no archives)
# because it tries to uncompress it to figure out what's inside.
# standard unix compress
-#0 string \037\235 compress'd data
-#!:mime application/x-compress
+0 string \037\235 compress'd data
+!:mime application/x-compress
+!:apple LZIVZIVU
>2 byte&0x80 >0 block compressed
>2 byte&0x1f x %d bits
# Edited by Chris Chittleborough <cchittleborough@yahoo.com.au>, March 2002
# * Original filename is only at offset 10 if "extra field" absent
# * Produce shorter output - notably, only report compression methods
-# other than 8 ("deflate", the only method defined in RFC 1952).
+# other than 8 ("deflate", the only method defined in RFC 1952).
0 string \037\213 gzip compressed data
!:mime application/x-gzip
+!:strength * 2
>2 byte <8 \b, reserved method
>2 byte >8 \b, unknown method
>3 byte &0x01 \b, ASCII
>3 byte&0xC =0x08
>>10 string x \b, was "%s"
>3 byte &0x10 \b, has comment
+>3 byte &0x20 \b, encrypted
+>4 ledate >0 \b, last modified: %s
+>8 byte 2 \b, max compression
+>8 byte 4 \b, max speed
>9 byte =0x00 \b, from FAT filesystem (MS-DOS, OS/2, NT)
>9 byte =0x01 \b, from Amiga
>9 byte =0x02 \b, from VMS
>9 byte =0x0B \b, from NTFS filesystem (NT)
>9 byte =0x0C \b, from QDOS
>9 byte =0x0D \b, from Acorn RISCOS
->3 byte &0x10 \b, comment
->3 byte &0x20 \b, encrypted
->4 ledate >0 \b, last modified: %s
->8 byte 2 \b, max compression
->8 byte 4 \b, max speed
# packed data, Huffman (minimum redundancy) codes on a byte-by-byte basis
0 string \037\036 packed data
!:mime application/x-bzip2
>3 byte >47 \b, block size = %c00k
+# lzip
+0 string LZIP lzip compressed data
+!:mime application/x-lzip
+>4 byte x \b, version: %d
+
# squeeze and crunch
# Michael Haardt <michael@cantor.informatik.rwth-aachen.de>
0 beshort 0x76FF squeezed data,
>4 belong 0x090A0C0D best compression
# 7-zip archiver, from Thomas Klausner (wiz@danbala.tuwien.ac.at)
-# http://www.7-zip.org or DOC/7zFormat.txt
+# http://www.7-zip.org or DOC/7zFormat.txt
#
0 string 7z\274\257\047\034 7-zip archive data,
>6 byte x version %d
>7 byte x \b.%d
+!:mime application/x-7z-compressed
# Type: LZMA
-# URL: http://www.7-zip.org/sdk.html
-# From: Robert Millan <rmh@aybabtu.com> and Reuben Thomas <rrt@sc3d.org>
-# Commented out because apparently not reliable (according to Debian
-# bug #364260)
-#0 string ]\000\000\200\000 LZMA compressed data
+0 lelong&0xffffff =0x5d
+>12 leshort 0xff LZMA compressed data,
+!:mime application/x-lzma
+>>5 lequad =0xffffffffffffffff streamed
+>>5 lequad !0xffffffffffffffff non-streamed, size %lld
+>12 leshort 0 LZMA compressed data,
+>>5 lequad =0xffffffffffffffff streamed
+>>5 lequad !0xffffffffffffffff non-streamed, size %lld
+
+# 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
+0 string LRZI LRZIP compressed data
+>4 byte x - version %d
+>5 byte x \b.%d
+!:mime application/x-lrzip
+
+# http://fastcompression.blogspot.fi/2013/04/lz4-streaming-format-final.html
+0 lelong 0x184d2204 LZ4 compressed data (v1.4+)
+!:mime application/x-lz4
+# Added by osm0sis@xda-developers.com
+0 lelong 0x184c2103 LZ4 compressed data (v1.0-v1.3)
+!:mime application/x-lz4
+0 lelong 0x184c2102 LZ4 compressed data (v0.1-v0.9)
+!:mime application/x-lz4
# AFX compressed files (Wolfram Kleff)
2 string -afx- AFX compressed file data
>4 byte x - version %d
>5 byte x \b.%d
>6 belong x (%d bytes)
+
+0 string ArC\x01 FreeArc archive <http://freearc.org>
+
+# Type: DACT compressed files
+0 long 0x444354C3 DACT compressed data
+>4 byte >-1 (version %i.
+>5 byte >-1 %i.
+>6 byte >-1 %i)
+>7 long >0 , original size: %i bytes
+>15 long >30 , block size: %i bytes
+
+# Valve Pack (VPK) files
+0 lelong 0x55aa1234 Valve Pak file
+>0x4 lelong x \b, version %u
+>0x8 lelong x \b, %u entries
+
+# Snappy framing format
+# http://code.google.com/p/snappy/source/browse/trunk/framing_format.txt
+0 string \377\006\0\0sNaPpY snappy framed data
+!:mime application/x-snappy-framed
+
+# qpress, http://www.quicklz.com/
+0 string qpress10 qpress compressed data
+!:mime application/x-qpress
+
+# Zlib https://www.ietf.org/rfc/rfc6713.txt
+0 string/b x
+>0 beshort%31 =0
+>>0 byte&0xf =8
+>>>0 byte&0x80 =0 zlib compressed data
+!:mime application/zlib
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