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Editing: cad

#------------------------------------------------------------------------------
# $File: cad,v 1.23 2020/05/30 23:58:07 christos Exp $
# autocad:  file(1) magic for cad files
#

# Microstation DGN/CIT Files (www.bentley.com)
# Last updated July 29, 2005 by Lester Hightower
# DGN is the default file extension of Microstation/Intergraph CAD files.
# CIT is the proprietary raster format (similar to TIFF) used to attach
# raster underlays to Microstation DGN (vector) drawings.
#
# http://www.wotsit.org/search.asp
# https://filext.com/detaillist.php?extdetail=DGN
# https://filext.com/detaillist.php?extdetail=CIT
#
# https://www.bentley.com/products/default.cfm?objectid=97F351F5-9C35-4E5E-89C2
# 3F86C928&method=display&p_objectid=97F351F5-9C35-4E5E-89C280A93F86C928
# https://www.bentley.com/products/default.cfm?objectid=A5C2FD43-3AC9-4C71-B682
# 721C479F&method=display&p_objectid=A5C2FD43-3AC9-4C71-B682C7BE721C479F
# 
# URL:		https://en.wikipedia.org/wiki/MicroStation
# reference:	http://dgnlib.maptools.org/dgn.html
#		http://dgnlib.maptools.org/dl/ref18.pdf
# Update:	Joerg Jenderek
# Note: verfied by command like `dgndump seed2d_b.dgn`
# test for level 8 and type 5 or 9
0	beshort&0x3F73	0x0801
# level of element like 8
#>0	ubyte&0x3F	x			\b, level %u
#>0	ubyte		&0x80			\b, complex
#>0	ubyte		&0x40			\b, reserved
# type of element 9~TCB 8~Digitizer setup 5~Group Data Elements
#>1	ubyte&0x7F	x			\b, type %u
# words to follow in element: 17H~CEL libray 2FEh~DGN 9FEh,DFEh~CIT
#>2	uleshort	x			\b, words 0x%4.4x to follow
# test for 3 reserved 0 bytes in CIT or "conversion" in ViewInfo structure (DGN CEL)
#>508	ubelong		x			\b, RESERVED %8.8x
>508	ubelong&0xFFffFF00	=0
# test for level 8 and type 9 for INGR raster image
>>0	beshort		0x0809
# test for length of 1st element is multiple of blocks a 512 bytes
>>>2	ubyte		0xfe
>>>>0 	use		ingr-image
# test for DGN or CEL by jump words (uleshort) forward to next element
>(2.s*2)	ulong		x
# 2nd element type: 8~Digitizer~DesiGNfile 1~library cell header other~CIT
#>>&1		ubyte&0x7F	x		\b, 2nd type %u
# DGN
>>&1		ubyte&0x7F	8
>>>2		uleshort	=0x02FE		Bentley/Intergraph Microstation CAD drawing
!:mime		application/x-bentley-dgn
!:ext		dgn
# The 0x40 bit of this byte is 1 if the file is 3D, otherwise 0
>>>>1214	ubyte  		&0x40		3D
>>>>1214	ubyte  		^0x40		2D
# 2 chars for name of subunits like ft FT in IN mu m mm '\0 '\040
>>>>1120	string		x		\b, units %-.2s
# 2 chars for name of master unit like IN in ML SU tn th TH HU mm "\0 "\040 \0\0
>>>>1122	string		>\0		%-.2s
#>>>>1120	ubelong		x		\b, units 0x%8.8x
# element range low,high x y z like xlow=0 08010000h 01080000h
#>>>>4		ubelong	  	!0		\b, xlow %8.8x
#>>>>8		ubelong	  	!0		\b, ylow %8.8x
#>>>>12		ubelong	  	!0		\b, zlow %8.8x
#>>>>16		ubelong	  	!0		\b, xhigh %8.8x
#>>>>20		ubelong	  	!0		\b, yhigh %8.8x
#>>>>24		ubelong	  	!0		\b, zhigh %8.8x
# graphic group number; all other elements in that group have same non-0 number
#>>>>28		leshort		x		\b, grphgrp 0x%4.4x
# words to optional attribute linkage
#>>>>30		ubyte		x		\b, attindx \%o
#>>>>31		ubyte		x		\b\%o
# >>30	string	\026\105			DGNFile
# >>30	string	\034\105			DGNFile
# >>30	string	\073\107			DGNFile
# >>30	string	\073\110			DGNFile
# >>30	string	\106\107			DGNFile
# >>30	string	\110\103			DGNFile
# >>30	string	\120\104			DGNFile
# >>30	string	\172\104			DGNFile
# >>30	string	\172\105			DGNFile
# >>30	string	\172\106			DGNFile
# >>30	string	\234\106			DGNFile
# >>30	string	\273\105			DGNFile
# >>30	string	\306\106			DGNFile
# >>30	string	\310\104			DGNFile
# >>30	string	\341\104			DGNFile
# >>30	string	\372\103			DGNFile
# >>30	string	\372\104			DGNFile
# >>30	string	\372\106			DGNFile
# >>30	string	\376\103			DGNFile
# elements properties indicator
#>>>>32		uleshort	!0		\b, properties 0x%4.4x
# class 0~Primary
#>>>>>32		uleshort&0x000F	!0		\b, class 0x%4.4x
# Symbology
#>>>>>34		uleshort	x		\b, Symbology 0x%4.4x
# test for 2nd element type 1~library cell header
>>&1		ubyte&0x7F	1
# test for 1st element with level 8 and type 5 for cell library
>>>0		beshort		0x0805		Bentley/Intergraph Microstation CAD cell library
!:mime		application/x-bentley-cel
!:ext		cel
#
# URL:		http://fileformats.archiveteam.org/wiki/Intergraph_Raster
# reference:	https://web.archive.org/web/20140903185431/
#		http://oreilly.com/www/centers/gff/formats/ingr/index.htm
# note:		verfied by command like `nconvert -fullinfo LONGLAT.CIT`
# display information for intergraph raster bitmap
0	name	ingr-image
# in 5.37 "Microstation CITFile" "Bentley/Intergraph MicroStation CIT raster CAD"
# DataTypeCode indicates format, depth of the pixel data and used compression 
>4	uleshort	x			Intergraph raster image
>>4	uleshort	0x0009			\b, Run-Length Encoded 1-bit
!:mime	image/x-intergraph-rle
!:ext	rel
>>4	uleshort	0x0018			\b, CCITT Group 4 1-bit
!:mime	image/x-intergraph-cit
!:ext	cit
>>4	uleshort	27			\b, Adaptive RLE RGB
!:mime	image/x-intergraph-rgb
!:ext	rgb
>>4	default		x
>>>4	uleshort	x			\b, Type %u
!:mime	image/x-intergraph
# TODO:
#>4	uleshort	0			\b, no data
# ...
#>4	uleshort	0x0045			\b, Continuous Tone CMKY (Uncompressed)
# ApplicationType: 0~generic raster image 3~drawing, scanning
# 8~I/IMAGE and MicroStation Imager 9~ModelView
>6	uleshort	!0			\b, ApplicationType %u
#>6	uleshort	x			\b, ApplicationType %u
# XViewOrigin; Raster grid data X origin
#>8	ulequad		!0			\b, XViewOrigin %llx
# PixelsPerLine is the number of pixels in a scan line of bitmapp
>184	ulelong		x			\b, %u x
# NumberOfLines is height of the raster data in scanlines
>188	ulelong		x			%u
# DeviceResolution; resolution of scanning device
# positive indicates number of micros between lines; negative indicates DPI
#>192	leshort		x			\b, DeviceResolution %d
# ScanlineOrient indicates the origin and the orientation of the scan lines
#>194	ubyte		x			\b, ScanlineOrient %x
>194	ubyte		x			\b, orientation
>194	ubyte		&0x01			right
>194	ubyte		^0x01			left
>194	ubyte		&0x02			down
>194	ubyte		^0x02			top
>194	ubyte		&0x04			horizontal
>194	ubyte		^0x04			vertical
# ScannableFlag; Scanline indexing method used
#>195	ubyte		!0			\b, ScannableFlag 0x%x
# RotationAngle; Rotation angle of raster data
#>196	ubequad		!0			\b, RotationAngle 0x%llx
# SkewAngle; Skew angle of raster data
#>204	ubequad		!0			\b, SkewAngle %llx
# DataTypeModifier; Additional raster data format info
#>212	uleshort	!0			\b, DataTypeModifier 0x%4.4x
# DesignFile[66]; Name of the design file
>214	string		>\0			\b, DesignFile %-.66s
# DatabaseFile[66]; Name of the database file
>280	string		>\0			\b, DatabaseFile %-.66s
# ParentGridFile[66]; Name of parent grid file
>346	string		>\0			\b, ParentGridFile %-.66s
# FileDescription[80]; Text description of file and contents
>412	string		>\0			\b, FileDescription %-.80s
# MinValue
#>492	ubequad		!0			\b, MinValue 0x%llx
# MaxValue
#>500	ubequad		!0			\b, MaxValue 0x%llx
# Reserved[3]; Unused (always 0)
#>508	ubelong&0xFFffFF00	x		\b, RESERVED %8.8x
# GridFileVersion; Grid File Version like 2 3
#>511	ubyte		x			\b, GridFileVersion %x

# AutoCAD
# Merge of the different contributions and updates from https://en.wikipedia.org/wiki/Dwg
# and https://www.iana.org/assignments/media-types/image/vnd.dwg
0	string	MC0.0	DWG AutoDesk AutoCAD Release 1.0
!:mime image/vnd.dwg
0	string	AC1.2	DWG AutoDesk AutoCAD Release 1.2
!:mime image/vnd.dwg
0	string	AC1.3	DWG AutoDesk AutoCAD Release 1.3
!:mime image/vnd.dwg
0	string	AC1.40	DWG AutoDesk AutoCAD Release 1.40
!:mime image/vnd.dwg
0	string	AC1.50	DWG AutoDesk AutoCAD Release 2.05
!:mime image/vnd.dwg
0	string	AC2.10	DWG AutoDesk AutoCAD Release 2.10
!:mime image/vnd.dwg
0	string	AC2.21	DWG AutoDesk AutoCAD Release 2.21
!:mime image/vnd.dwg
0	string	AC2.22	DWG AutoDesk AutoCAD Release 2.22
!:mime image/vnd.dwg
0	string	AC1001	DWG AutoDesk AutoCAD Release 2.22
!:mime image/vnd.dwg
0	string	AC1002	DWG AutoDesk AutoCAD Release 2.50
!:mime image/vnd.dwg
0	string	AC1003	DWG AutoDesk AutoCAD Release 2.60
!:mime image/vnd.dwg
0	string	AC1004	DWG AutoDesk AutoCAD Release 9
!:mime image/vnd.dwg
0	string	AC1006	DWG AutoDesk AutoCAD Release 10
!:mime image/vnd.dwg
0	string	AC1009	DWG AutoDesk AutoCAD Release 11/12
!:mime image/vnd.dwg
# AutoCAD DWG versions R13/R14 (www.autodesk.com)
# Written December 01, 2003 by Lester Hightower
# Based on the DWG File Format Specifications at http://www.opendwg.org/
# AutoCad, from Nahuel Greco
# AutoCAD DWG versions R12/R13/R14 (www.autodesk.com)
0	string	AC1012	DWG AutoDesk AutoCAD Release 13
!:mime image/vnd.dwg
0	string	AC1014	DWG AutoDesk AutoCAD Release 14
!:mime image/vnd.dwg
0	string	AC1015	DWG AutoDesk AutoCAD 2000/2002
!:mime image/vnd.dwg

# A new version of AutoCAD DWG
# Sergey Zaykov (mail_of_sergey@mail.ru, sergey_zaikov@rambler.ru,
# ICQ 358572321)
# From various sources like:
# https://autodesk.blogs.com/between_the_lines/autocad-release-history.html
0	string	AC1018	DWG AutoDesk AutoCAD 2004/2005/2006
!:mime image/vnd.dwg
0	string	AC1021	DWG AutoDesk AutoCAD 2007/2008/2009
!:mime image/vnd.dwg
0	string	AC1024	DWG AutoDesk AutoCAD 2010/2011/2012
!:mime image/vnd.dwg
0	string	AC1027	DWG AutoDesk AutoCAD 2013-2017
!:mime image/vnd.dwg

# From GNU LibreDWG
0	string	AC1032	DWG AutoDesk AutoCAD 2018/2019
!:mime image/vnd.dwg

# KOMPAS 2D drawing from ASCON
# This is KOMPAS 2D drawing or fragment of drawing but is not detailed nor
# gathered nor specification
# ASCON https://ascon.net/main/ in English,
#	https://ascon.ru/ main site in Russian
# Extension is CDW for drawing and FRW for fragment of drawing
# Sergey Zaykov (mail_of_sergey@mail.ru, sergey_zaikov@rambler.ru,
# ICQ 358572321, https://vkontakte.ru/id16076543)
# From:
# https://sd.ascon.ru/otrs/customer.pl?Action=CustomerFAQ&CategoryID=4&ItemID=292
# (in russian) and my experiments
0	string	KF
>2	belong	0x4E00000C	Kompas drawing 12.0 SP1
>2	belong	0x4D00000C	Kompas drawing 12.0
>2	belong	0x3200000B	Kompas drawing 11.0 SP1
>2	belong	0x3100000B	Kompas drawing 11.0
>2	belong	0x2310000A	Kompas drawing 10.0 SP1
>2	belong	0x2110000A	Kompas drawing 10.0
>2	belong	0x08000009	Kompas drawing 9.0 SP1
>2	belong	0x05000009	Kompas drawing 9.0
>2	belong	0x33010008	Kompas drawing 8+
>2	belong	0x1A000008	Kompas drawing 8.0
>2	belong	0x2C010107	Kompas drawing 7+
>2	belong	0x05000007	Kompas drawing 7.0
>2	belong	0x32000006	Kompas drawing 6+
>2	belong	0x09000006	Kompas drawing 6.0
>2	belong	0x5C009005	Kompas drawing 5.11R03
>2	belong	0x54009005	Kompas drawing 5.11R02
>2	belong	0x51009005	Kompas drawing 5.11R01
>2	belong	0x22009005	Kompas drawing 5.10R03
>2	belong	0x22009005	Kompas drawing 5.10R02 mar
>2	belong	0x21009005	Kompas drawing 5.10R02 febr
>2	belong	0x19009005	Kompas drawing 5.10R01
>2	belong	0xF4008005	Kompas drawing 5.9R01.003
>2	belong	0x1C008005	Kompas drawing 5.9R01.002
>2	belong	0x11008005	Kompas drawing 5.8R01.003

# CAD: file(1) magic for computer aided design files
# Phillip Griffith <phillip dot griffith at gmail dot com>
# AutoCAD magic taken from the Open Design Alliance's OpenDWG specifications.
#

# 3DS (3d Studio files)
0	leshort		0x4d4d
>6	leshort		0x2
>>8	lelong		0xa
>>>16	leshort		0x3d3d	3D Studio model
!:mime	image/x-3ds
!:ext 3ds

# MegaCAD 2D/3D drawing (.prt)
# https://megacad.de/
# From: Markus Heidelberg <markus.heidelberg@web.de>
0	string	MegaCad23\0	MegaCAD 2D/3D drawing

# Hoops CAD files
# https://docs.techsoft3d.com/visualize/3df/latest/build/general/hsf/\
# HSF_architecture.html
# Stephane Charette <stephane.charette@gmail.com>
0	string	;;\020HSF\020V		OpenHSF (Hoops Stream Format)
>7	regex/9 V[.0-9]{4,5}\020	%s
!:ext hsf

# AutoCAD Drawing Exchange Format
0	regex		\^[\ \t]*0\r?\000$
>1	regex		\^[\ \t]*SECTION\r?$
>>2	regex		\^[\ \t]*2\r?$
>>>3	regex		\^[\ \t]*HEADER\r?$	AutoCAD Drawing Exchange Format
!:mime	application/x-dxf
!:ext	dxf
>>>>&1	search/8192	AC1006			\b, R10
>>>>&1	search/8192	AC1009			\b, R11/R12
>>>>&1	search/8192	AC1012			\b, R13
>>>>&1	search/8192	AC1014			\b, R14
>>>>&1	search/8192	AC1015			\b, version 2000
>>>>&1	search/8192	AC1018			\b, version 2004
>>>>&1	search/8192	AC1021			\b, version 2007
>>>>&1	search/8192	AC1024			\b, version 2010

# The Sketchup 3D model format https://www.sketchup.com/
0	string	\xff\xfe\xff\x0e\x53\x00\x6b\x00\x65\x00\x74\x00\x63\x00\x68\x00\x55\x00\x70\x00\x20\x00\x4d\x00\x6f\x00\x64\x00\x65\x00\x6c\x00	SketchUp Model
!:mime application/vnd.sketchup.skp
!:ext skp

4	regex/b	P[0-9][0-9]\\.[0-9][0-9][0-9][0-9]\\.[0-9][0-9][0-9][0-9]\\.[0-9]	NAXOS CAD System file from version %s
!:strength +40

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