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📄 tex(4.55 KB)
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📄 tplink(2.89 KB)
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📄 typeset(286 B)
📄 unicode(771 B)
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📄 unknown(1.34 KB)
📄 usd(568 B)
📄 uterus(468 B)
📄 uuencode(1.09 KB)
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📄 varied.out(1.63 KB)
📄 varied.script(1.49 KB)
📄 vax(1001 B)
📄 vicar(759 B)
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📄 visx(972 B)
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📄 vorbis(5.97 KB)
📄 vxl(489 B)
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📄 weak(629 B)
📄 web(371 B)
📄 webassembly(633 B)
📄 windows(37.27 KB)
📄 wireless(295 B)
📄 wordprocessors(10.51 KB)
📄 wsdl(761 B)
📄 x68000(743 B)
📄 xdelta(548 B)
📄 xenix(2.98 KB)
📄 xilinx(1.26 KB)
📄 xo65(987 B)
📄 xwindows(1.04 KB)
📄 yara(461 B)
📄 zfs(2.37 KB)
📄 zilog(451 B)
📄 zip(3.23 KB)
📄 zyxel(613 B)

Editing: compress

#------------------------------------------------------------------------------
# $File: compress,v 1.79 2020/05/30 23:53:04 christos Exp $
# compress:  file(1) magic for pure-compression formats (no archives)
#
# compress, gzip, pack, compact, huf, squeeze, crunch, freeze, yabba, etc.
#
# Formats for various forms of compressed data
# Formats for "compress" proper have been moved into "compress.c",
# 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
!:apple	LZIVZIVU
>2	byte&0x80	>0		block compressed
>2	byte&0x1f	x		%d bits

# gzip (GNU zip, not to be confused with Info-ZIP or PKWARE zip archiver)
# URL: https://en.wikipedia.org/wiki/Gzip
# Reference: https://tools.ietf.org/html/rfc1952
# Update: Joerg Jenderek, Apr 2019
#   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).
# Note: find defs -iname '*.trid.xml' -exec grep -q '<Bytes>1F8B08' {} \; -ls
# TODO:
# FBR	Blueberry FlashBack screen Record	https://www.flashbackrecorder.com/
# KPR	KOffice/Calligra KPresenter		application/x-kpresenter
# KPT	KOffice/Calligra KPresenter template?	application/x-kpresenter
# SAV	Diggles Saved Game File			http://www.innonics.com
# SAV	FarCry (demo) saved game		http://www.farcry-thegame.com
# DAT	ZOAGZIP game data format		http://en.wikipedia.org/wiki/SD_Gundam_Capsule_Fighter
0       string          \037\213
# to display gzip compressed (strength=100=2*50) before other (strength=50)?
#!:strength * 2
# no FNAME and FCOMMENT bit implies no file name/comment. That means only binary
>3	byte&0x18	=0
# For binary gzipped no ASCII text should occur
#	mcd-monu-cad.trid.xml
>>10	string		MCD			Monu-Cad Drawing, Component or Font
#>>36	string		Created\ with\ MONU-CAD	
#!:mime	application/octet-stream
# http://fileformats.archiveteam.org/wiki/Monu-CAD
#	http://www.monucad.com/downloads/FullDemo-2005.EXE
#	/HANDS96.MCC	Component
#	/DEMO_DD01.MCD	Drawing
#	/MCALF020.FNT	Font
!:ext	mcc/mcd/fnt
# http://www.generalcadd.com
>>10	string		GXD			General CADD, Drawing or Component
#!:mime	application/octet-stream
#	/gxc/BUILDINGEDGE.gxc			Component
#	/gxd/HOCKETT-STPAUL-WRHSE.gxd		Drawing
#	/gxd/POWERLAND-MILL-ADD-11.gxd		Drawing		v9.1.06
!:ext	gxc/gxd
#>>>13	ubyte		0			\b, version 0
>>>13	string		09			\b, version 9
# other gzipped binary like gzipped tar, VirtualBox extension package,...
>>10	default		x		gzip compressed data
!:mime	application/gzip
>>>0	use	gzip-info
# size of the original (uncompressed) input data modulo 2^32
>>-0	offset		>48
>>>-4	ulelong		x		\b, original size modulo 2^32 %u
>>-0	offset		<48		\b, truncated
# gzipped TAR or VirtualBox extension package
#!:mime	application/x-compressed-tar
#!:mime	application/x-virtualbox-vbox-extpack
# https://www.w3.org/TR/SVG/mimereg.html
#!:mime	image/image/svg+xml-compressed
#	zlib.3.gz
#	microcode-20180312.tgz
#	tpz same as tgz
#	lua-md5_1.2-1_i386_i486.ipk	https://en.wikipedia.org/wiki/Opkg
#	Oracle_VM_VirtualBox_Extension_Pack-5.0.12-104815.vbox-extpack
!:ext	gz/tgz/tpz/ipk/vbox-extpack/svgz
# FNAME/FCOMMENT bit implies file name/comment as iso-8859-1 text
>3	byte&0x18	>0		gzip compressed data
!:mime	application/gzip
# gzipped tar, gzipped Abiword document
#!:mime	application/x-compressed-tar
#!:mime	application/x-abiword-compressed
#!:mime	image/image/svg+xml-compressed
#	kleopatra_splashscreen.svgz	gzipped .svg
!:ext	gz/tgz/tpz/zabw/svgz
>>0	use	gzip-info
# size of the original (uncompressed) input data modulo 2^32
>>-0	offset		>48
>>>-4	ulelong		x		\b, original size modulo 2^32 %u
>>-0	offset		<48		\b, truncated
#	display information of gzip compressed files
0	name				gzip-info
#>2	byte		x		THIS iS GZIP
>2	byte		<8		\b, reserved method
>2	byte		>8		\b, unknown method
>3	byte		&0x01		\b, ASCII
>3	byte		&0x02		\b, has CRC
>3	byte		&0x04		\b, extra field
>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		=0x03		\b, from Unix
>9	byte		=0x04		\b, from VM/CMS
>9	byte		=0x05		\b, from Atari
>9	byte		=0x06		\b, from HPFS filesystem (OS/2, NT)
>9	byte		=0x07		\b, from MacOS
>9	byte		=0x08		\b, from Z-System
>9	byte		=0x09		\b, from CP/M
>9	byte		=0x0A		\b, from TOPS/20
>9	byte		=0x0B		\b, from NTFS filesystem (NT)
>9	byte		=0x0C		\b, from QDOS
>9	byte		=0x0D		\b, from Acorn RISCOS
# size of the original (uncompressed) input data modulo 2^32
#>-4	ulelong		x		\b, original size modulo 2^32 %u
#ERROR: line 114: non zero offset 1048572 at level 1

# packed data, Huffman (minimum redundancy) codes on a byte-by-byte basis
0	string		\037\036	packed data
!:mime	application/octet-stream
>2	belong		>1		\b, %d characters originally
>2	belong		=1		\b, %d character originally
#
# This magic number is byte-order-independent.
0	short		0x1f1f		old packed data
!:mime	application/octet-stream

# XXX - why *two* entries for "compacted data", one of which is
# byte-order independent, and one of which is byte-order dependent?
#
0	short		0x1fff		compacted data
!:mime	application/octet-stream
# This string is valid for SunOS (BE) and a matching "short" is listed
# in the Ultrix (LE) magic file.
0	string		\377\037	compacted data
!:mime	application/octet-stream
0	short		0145405		huf output
!:mime	application/octet-stream

# bzip2
0	string		BZh		bzip2 compressed data
!:mime	application/x-bzip2
>3	byte		>47		\b, block size = %c00k

# bzip	a block-sorting file compressor
#	by Julian Seward <sewardj@cs.man.ac.uk> and others
0	string		BZ0		bzip compressed data
!:mime	application/x-bzip
>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	string		x		original name %s
0	beshort		0x76FE		crunched data,
>2	string		x		original name %s
0	beshort		0x76FD		LZH compressed data,
>2	string		x		original name %s

# Freeze
0	string		\037\237	frozen file 2.1
0	string		\037\236	frozen file 1.0 (or gzip 0.5)

# SCO compress -H (LZH)
0	string		\037\240	SCO compress -H (LZH) data

# European GSM 06.10 is a provisional standard for full-rate speech
# transcoding, prI-ETS 300 036, which uses RPE/LTP (residual pulse
# excitation/long term prediction) coding at 13 kbit/s.
#
# There's only a magic nibble (4 bits); that nibble repeats every 33
# bytes.  This isn't suited for use, but maybe we can use it someday.
#
# This will cause very short GSM files to be declared as data and
# mismatches to be declared as data too!
#0	byte&0xF0	0xd0		data
#>33	byte&0xF0	0xd0
#>66	byte&0xF0	0xd0
#>99	byte&0xF0	0xd0
#>132	byte&0xF0	0xd0		GSM 06.10 compressed audio

# lzop from <markus.oberhumer@jk.uni-linz.ac.at>
0	string		\x89\x4c\x5a\x4f\x00\x0d\x0a\x1a\x0a	lzop compressed data
>9	beshort		<0x0940
>>9	byte&0xf0	=0x00		- version 0.
>>9	beshort&0x0fff	x		\b%03x,
>>13	byte		1		LZO1X-1,
>>13	byte		2		LZO1X-1(15),
>>13	byte		3		LZO1X-999,
## >>22	bedate		>0		last modified: %s,
>>14	byte		=0x00		os: MS-DOS
>>14	byte		=0x01		os: Amiga
>>14	byte		=0x02		os: VMS
>>14	byte		=0x03		os: Unix
>>14	byte		=0x05		os: Atari
>>14	byte		=0x06		os: OS/2
>>14	byte		=0x07		os: MacOS
>>14	byte		=0x0A		os: Tops/20
>>14	byte		=0x0B		os: WinNT
>>14	byte		=0x0E		os: Win32
>9	beshort		>0x0939
>>9	byte&0xf0	=0x00		- version 0.
>>9	byte&0xf0	=0x10		- version 1.
>>9	byte&0xf0	=0x20		- version 2.
>>9	beshort&0x0fff	x		\b%03x,
>>15	byte		1		LZO1X-1,
>>15	byte		2		LZO1X-1(15),
>>15	byte		3		LZO1X-999,
## >>25	bedate		>0		last modified: %s,
>>17	byte		=0x00		os: MS-DOS
>>17	byte		=0x01		os: Amiga
>>17	byte		=0x02		os: VMS
>>17	byte		=0x03		os: Unix
>>17	byte		=0x05		os: Atari
>>17	byte		=0x06		os: OS/2
>>17	byte		=0x07		os: MacOS
>>17	byte		=0x0A		os: Tops/20
>>17	byte		=0x0B		os: WinNT
>>17	byte		=0x0E		os: Win32

# 4.3BSD-Quasijarus Strong Compression
# https://minnie.tuhs.org/Quasijarus/compress.html
0	string		\037\241	Quasijarus strong compressed data

# From: Cory Dikkers <cdikkers@swbell.net>
0	string		XPKF		Amiga xpkf.library compressed data
0	string		PP11		Power Packer 1.1 compressed data
0	string		PP20		Power Packer 2.0 compressed data,
>4	belong		0x09090909	fast compression
>4	belong		0x090A0A0A	mediocre compression
>4	belong		0x090A0B0B	good compression
>4	belong		0x090A0C0C	very good compression
>4	belong		0x090A0C0D	best compression

# 7-zip archiver, from Thomas Klausner (wiz@danbala.tuwien.ac.at)
# https://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
!:ext 7z/cb7

# Type: LZMA
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

# https://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

# 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/zstd
0     lelong       0xFD2FB523  Zstandard compressed data (v0.3)
!:mime  application/zstd
0     lelong       0xFD2FB524  Zstandard compressed data (v0.4)
!:mime  application/zstd
0     lelong       0xFD2FB525  Zstandard compressed data (v0.5)
!:mime  application/zstd
0     lelong       0xFD2FB526  Zstandard compressed data (v0.6)
!:mime  application/zstd
0     lelong       0xFD2FB527  Zstandard compressed data (v0.7)
!:mime  application/zstd
>4    use          zstd-dictionary-id
0     lelong       0xFD2FB528  Zstandard compressed data (v0.8+)
!:mime  application/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-std-dictionary
>4 lelong    x           (ID %u)

# AFX compressed files (Wolfram Kleff)
2	string		-afx-		AFX compressed file data

# Supplementary magic data for the file(1) command to support
# rzip(1).  The format is described in magic(5).
#
# Copyright (C) 2003 by Andrew Tridgell.  You may do whatever you want with
# this file.
#
0	string		RZIP		rzip compressed 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
# https://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, https://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

# BWC compression
0	string		BWC
>3	byte		0	BWC compressed data

# UCL compression
0	bequad		0x00e955434cff011a	UCL compressed data

# Softlib archive
0	string		SLIB	Softlib archive
>4	leshort		x	\b, version %d
>6	leshort		x	(contains %d files)

# URL:  https://github.com/lzfse/lzfse/blob/master/src/lzfse_internal.h#L276
# From: Eric Hall <eric.hall@darkart.com>
0	string	bvx-	lzfse encoded, no compression
0	string	bvx1	lzfse compressed, uncompressed tables
0	string	bvx2	lzfse compressed, compressed tables
0	string	bvxn	lzfse encoded, lzvn compressed

# pcxLib.exe compression program
# http://www.shikadi.net/moddingwiki/PCX_Library
0	string/b	pcxLib
>0x0A	string/b	Copyright\020(c)\020Genus\020Microprogramming,\020Inc.	pcxLib compressed

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