1 2#------------------------------------------------------------------------------ 3# $File: cad,v 1.9 2009/09/19 16:28:08 christos Exp $ 4# autocad: file(1) magic for cad files 5# 6 7# AutoCAD DWG versions R13/R14 (www.autodesk.com) 8# Written December 01, 2003 by Lester Hightower 9# Based on the DWG File Format Specifications at http://www.opendwg.org/ 100 string \101\103\061\060\061 AutoCAD 11>5 string \062\000\000\000\000 DWG ver. R13 12>5 string \064\000\000\000\000 DWG ver. R14 13 14# Microstation DGN/CIT Files (www.bentley.com) 15# Last updated July 29, 2005 by Lester Hightower 16# DGN is the default file extension of Microstation/Intergraph CAD files. 17# CIT is the proprietary raster format (similar to TIFF) used to attach 18# raster underlays to Microstation DGN (vector) drawings. 19# 20# http://www.wotsit.org/search.asp 21# http://filext.com/detaillist.php?extdetail=DGN 22# http://filext.com/detaillist.php?extdetail=CIT 23# 24# http://www.bentley.com/products/default.cfm?objectid=97F351F5-9C35-4E5E-89C2 25# 3F86C928&method=display&p_objectid=97F351F5-9C35-4E5E-89C280A93F86C928 26# http://www.bentley.com/products/default.cfm?objectid=A5C2FD43-3AC9-4C71-B682 27# 721C479F&method=display&p_objectid=A5C2FD43-3AC9-4C71-B682C7BE721C479F 280 string \010\011\376 Microstation 29>3 string \002 30>>30 string \026\105 DGNFile 31>>30 string \034\105 DGNFile 32>>30 string \073\107 DGNFile 33>>30 string \073\110 DGNFile 34>>30 string \106\107 DGNFile 35>>30 string \110\103 DGNFile 36>>30 string \120\104 DGNFile 37>>30 string \172\104 DGNFile 38>>30 string \172\105 DGNFile 39>>30 string \172\106 DGNFile 40>>30 string \234\106 DGNFile 41>>30 string \273\105 DGNFile 42>>30 string \306\106 DGNFile 43>>30 string \310\104 DGNFile 44>>30 string \341\104 DGNFile 45>>30 string \372\103 DGNFile 46>>30 string \372\104 DGNFile 47>>30 string \372\106 DGNFile 48>>30 string \376\103 DGNFile 49>4 string \030\000\000 CITFile 50>4 string \030\000\003 CITFile 51 52# AutoCad, from Nahuel Greco 53# AutoCAD DWG versions R12/R13/R14 (www.autodesk.com) 540 string AC1012 AutoCad (release 12) 550 string AC1013 AutoCad (release 13) 560 string AC1014 AutoCad (release 14) 57 58# CAD: file(1) magic for computer aided design files 59# Phillip Griffith <phillip dot griffith at gmail dot com> 60# AutoCAD magic taken from the Open Design Alliance's OpenDWG specifications. 61# 620 belong 0x08051700 Bentley/Intergraph MicroStation DGN cell library 630 belong 0x0809fe02 Bentley/Intergraph MicroStation DGN vector CAD 640 belong 0xc809fe02 Bentley/Intergraph MicroStation DGN vector CAD 650 beshort 0x0809 Bentley/Intergraph MicroStation 66>0x02 byte 0xfe 67>>0x04 beshort 0x1800 CIT raster CAD 680 string AC1012 AutoDesk AutoCAD R13 690 string AC1014 AutoDesk AutoCAD R14 700 string AC1015 AutoDesk AutoCAD R2000 71