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+#------------------------------------------------------------------------------
+# $File: compress,v 1.91 2023/06/16 19:37:47 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
+!:ext Z
+>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, Dec 2022
+# 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
+# TODO: check for GXD MCD cad the reported size
+>>>-4 ulelong x \b, original size modulo 2^32 %u
+# 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/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
+# trees.blend http://fileformats.archiveteam.org/wiki/BLEND
+# 2020-07-19-Note-16-24.xoj https://xournal.sourceforge.net/manual.html
+# MYgnucash-gz.gnucash https://wiki.gnucash.org/wiki/GnuCash_XML_format
+# text-rotate.dia https://en.wikipedia.org/wiki/Dia_(software)
+# MYrdata.RData https://en.wikipedia.org/wiki/R_(programming_language)
+!:ext gz/tgz/tpz/ipk/vbox-extpack/svgz/blend/dia/gnucash/rdata/xoj
+# 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
+# RSI-Mega-Demo_Disk1.adz gzipped .adf http://fileformats.archiveteam.org/wiki/ADF_(Amiga)
+# PostbankTest.kmy gzipped XML https://docs.kde.org/stable5/en/kmymoney/kmymoney/details.formats.compressed.html
+# Logo.xcfgz gzipped .xcf http://fileformats.archiveteam.org/wiki/XCF
+!:ext gz/tgz/tpz/zabw/svgz/adz/kmy/xcfgz
+>>0 use gzip-info
+# size of the original (uncompressed) input data modulo 2^32
+>>-4 ulelong x \b, original size modulo 2^32 %u
+# 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
+!:ext z
+>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
+!:ext bz2
+>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
+!:ext lz
+>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
+!:ext lzo
+>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
+
+0 name lzma LZMA compressed data,
+!:mime application/x-lzma
+!:ext lzma
+>5 lequad =0xffffffffffffffff streamed
+>5 lequad !0xffffffffffffffff non-streamed, size %lld
+
+# Type: LZMA
+0 lelong&0xffffff =0x5d
+>12 leshort 0xff
+>>0 use lzma
+>12 leshort 0
+>>0 use lzma
+
+# http://tukaani.org/xz/xz-file-format.txt
+0 ustring \xFD7zXZ\x00 XZ compressed data, checksum
+!:strength * 2
+!:mime application/x-xz
+!:ext xz
+>7 byte&0xf 0x0 NONE
+>7 byte&0xf 0x1 CRC32
+>7 byte&0xf 0x4 CRC64
+>7 byte&0xf 0xa SHA-256
+
+# https://github.com/ckolivas/lrzip/blob/master/doc/magic.header.txt
+0 string LRZI LRZIP compressed data
+!:mime application/x-lrzip
+>4 byte x - version %d
+>5 byte x \b.%d
+>22 byte 1 \b, encrypted
+
+# https://fastcompression.blogspot.fi/2013/04/lz4-streaming-format-final.html
+0 lelong 0x184d2204 LZ4 compressed data (v1.4+)
+!:mime application/x-lz4
+!:ext 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
+!:ext zst
+0 lelong 0xFD2FB523 Zstandard compressed data (v0.3)
+!:mime application/zstd
+!:ext zst
+0 lelong 0xFD2FB524 Zstandard compressed data (v0.4)
+!:mime application/zstd
+!:ext zst
+0 lelong 0xFD2FB525 Zstandard compressed data (v0.5)
+!:mime application/zstd
+!:ext zst
+0 lelong 0xFD2FB526 Zstandard compressed data (v0.6)
+!:mime application/zstd
+!:ext zst
+0 lelong 0xFD2FB527 Zstandard compressed data (v0.7)
+!:mime application/zstd
+!:ext zst
+>4 use zstd-dictionary-id
+0 lelong 0xFD2FB528 Zstandard compressed data (v0.8+)
+!:mime application/zstd
+!:ext zst
+>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
+
+# https://support-docs.illumina.com/SW/ORA_Format_Specification/Content/SW/ORA/ORAFormatSpecification.htm
+0 uleshort 0x7c49
+>2 lelong 0x80 ORA FASTQ compressed file
+>>6 ulelong x \b, DNA size %u
+>>10 ulelong x \b, read names size %u
+>>14 ulelong x \b, quality buffer 1 size %u
+>>18 ulelong x \b, quality buffer 2 size %u
+>>22 ulelong x \b, sequence buffer size %u
+>>26 ulelong x \b, N-position buffer size %u
+>>30 ulelong x \b, crypto buffer size %u
+>>34 ulelong x \b, misc buffer 1 size %u
+>>38 ulelong x \b, misc buffer 2 size %u
+>>42 ulelong x \b, flags %#x
+>>46 lelong x \b, read size %d
+>>50 lelong x \b, number of reads %d
+>>54 leshort x \b, version %d
+
+# https://github.com/kspalaiologos/bzip3/blob/master/doc/file_format.md
+0 string/b BZ3v1 bzip3 compressed data
+>5 ulelong x \b, blocksize %u
+
+
+# https://support-docs.illumina.com/SW/ORA_Format_Specification/Content/\
+# SW/ORA/ORAFormatSpecification.htm
+# From Guillaume Rizk
+0 short =0x7C49 DRAGEN ORA file,
+>-261 short =0x7C49 with metadata:
+>-125 u8 x NB reads: %llu,
+>-109 u8 x NB bases: %llu.
+>-219 u4&0x02 2 File contains interleaved paired reads
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 02:43:48 +0000