1 /******************************************************************************
2 **  libDXFrw - Library to read/write DXF files (ascii & binary)              **
3 **                                                                           **
4 **  Copyright (C) 2011-2015 José F. Soriano, rallazz@gmail.com               **
5 **                                                                           **
6 **  This library is free software, licensed under the terms of the GNU       **
7 **  General Public License as published by the Free Software Foundation,     **
8 **  either version 2 of the License, or (at your option) any later version.  **
9 **  You should have received a copy of the GNU General Public License        **
10 **  along with this program.  If not, see <http://www.gnu.org/licenses/>.    **
11 ******************************************************************************/
12 
13 #ifndef DWGREADER18_H
14 #define DWGREADER18_H
15 
16 #include <map>
17 #include <list>
18 #include "dwgreader.h"
19 //#include "../drw_textcodec.h"
20 #include "dwgbuffer.h"
21 
22 static const int DRW_magicNum18[] =
23 {
24   0x29, 0x23, 0xbe, 0x84, 0xe1, 0x6c, 0xd6, 0xae,
25   0x52, 0x90, 0x49, 0xf1, 0xf1, 0xbb, 0xe9, 0xeb,
26   0xb3, 0xa6, 0xdb, 0x3c, 0x87, 0x0c, 0x3e, 0x99,
27   0x24, 0x5e, 0x0d, 0x1c, 0x06, 0xb7, 0x47, 0xde,
28   0xb3, 0x12, 0x4d, 0xc8, 0x43, 0xbb, 0x8b, 0xa6,
29   0x1f, 0x03, 0x5a, 0x7d, 0x09, 0x38, 0x25, 0x1f,
30   0x5d, 0xd4, 0xcb, 0xfc, 0x96, 0xf5, 0x45, 0x3b,
31   0x13, 0x0d, 0x89, 0x0a, 0x1c, 0xdb, 0xae, 0x32,
32   0x20, 0x9a, 0x50, 0xee, 0x40, 0x78, 0x36, 0xfd,
33   0x12, 0x49, 0x32, 0xf6, 0x9e, 0x7d, 0x49, 0xdc,
34   0xad, 0x4f, 0x14, 0xf2, 0x44, 0x40, 0x66, 0xd0,
35   0x6b, 0xc4, 0x30, 0xb7, 0x32, 0x3b, 0xa1, 0x22,
36   0xf6, 0x22, 0x91, 0x9d, 0xe1, 0x8b, 0x1f, 0xda,
37   0xb0, 0xca, 0x99, 0x02
38 };
39 
40 static const int DRW_magicNumEnd18[] =
41 {
42   0xf8, 0x46, 0x6a, 0x04, 0x96, 0x73, 0x0e, 0xd9,
43   0x16, 0x2f, 0x67, 0x68, 0xd4, 0xf7, 0x4a, 0x4a,
44   0xd0, 0x57, 0x68, 0x76
45 };
46 
47 class dwgReader18 : public dwgReader
48 {
49   public:
dwgReader18(std::ifstream * stream,dwgR * p)50     dwgReader18( std::ifstream *stream, dwgR *p )
51       : dwgReader( stream, p )
52       , objData( nullptr )
53       , uncompSize( 0 )
54     {
55     }
~dwgReader18()56     virtual ~dwgReader18()
57     {
58       if ( objData )
59         delete[] objData;
60     }
61     bool readMetaData();
62     bool readFileHeader();
63     bool readDwgHeader( DRW_Header &hdr );
64     bool readDwgClasses();
65     bool readDwgHandles();
66     bool readDwgTables( DRW_Header &hdr );
readDwgBlocks(DRW_Interface & intfa)67     bool readDwgBlocks( DRW_Interface &intfa )
68     {
69       dwgBuffer dataBuf( objData, uncompSize, &decoder );
70       return dwgReader::readDwgBlocks( intfa, &dataBuf );
71     }
72 
readDwgEntities(DRW_Interface & intfa)73     virtual bool readDwgEntities( DRW_Interface &intfa )
74     {
75       bool ret = true;
76       dwgBuffer dataBuf( objData, uncompSize, &decoder );
77       ret = dwgReader::readDwgEntities( intfa, &dataBuf );
78       return ret;
79     }
readDwgObjects(DRW_Interface & intfa)80     virtual bool readDwgObjects( DRW_Interface &intfa )
81     {
82       dwgBuffer dataBuf( objData, uncompSize, &decoder );
83       return dwgReader::readDwgObjects( intfa, &dataBuf );
84     }
85 
86 #if 0
87     bool readDwgEntity( objHandle &obj, DRW_Interface &intfa )
88     {
89       bool ret = true;
90       return ret;
91     }
92 #endif
93 
94   protected:
95     duint8 *objData = nullptr;
96     duint64 uncompSize;
97 
98   private:
99     void genMagicNumber();
100 //    dwgBuffer* bufObj;
101     void parseSysPage( duint8 *decompSec, duint32 decompSize ); //called: Section page map: 0x41630e3b
102     bool parseDataPage( dwgSectionInfo si/*, duint8 *dData*/ ); //called ???: Section map: 0x4163003b
103     duint32 checksum( duint32 seed, duint8 *data, duint32 sz );
104 
105   private:
106     duint32 securityFlags;
107 };
108 
109 #endif // DWGREADER18_H
110