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     0x29, 0x23, 0xbe, 0x84, 0xe1, 0x6c, 0xd6, 0xae,
24     0x52, 0x90, 0x49, 0xf1, 0xf1, 0xbb, 0xe9, 0xeb,
25     0xb3, 0xa6, 0xdb, 0x3c, 0x87, 0x0c, 0x3e, 0x99,
26     0x24, 0x5e, 0x0d, 0x1c, 0x06, 0xb7, 0x47, 0xde,
27     0xb3, 0x12, 0x4d, 0xc8, 0x43, 0xbb, 0x8b, 0xa6,
28     0x1f, 0x03, 0x5a, 0x7d, 0x09, 0x38, 0x25, 0x1f,
29     0x5d, 0xd4, 0xcb, 0xfc, 0x96, 0xf5, 0x45, 0x3b,
30     0x13, 0x0d, 0x89, 0x0a, 0x1c, 0xdb, 0xae, 0x32,
31     0x20, 0x9a, 0x50, 0xee, 0x40, 0x78, 0x36, 0xfd,
32     0x12, 0x49, 0x32, 0xf6, 0x9e, 0x7d, 0x49, 0xdc,
33     0xad, 0x4f, 0x14, 0xf2, 0x44, 0x40, 0x66, 0xd0,
34     0x6b, 0xc4, 0x30, 0xb7, 0x32, 0x3b, 0xa1, 0x22,
35     0xf6, 0x22, 0x91, 0x9d, 0xe1, 0x8b, 0x1f, 0xda,
36     0xb0, 0xca, 0x99, 0x02
37 };
38 
39 static const int DRW_magicNumEnd18[] = {
40     0xf8, 0x46, 0x6a, 0x04, 0x96, 0x73, 0x0e, 0xd9,
41     0x16, 0x2f, 0x67, 0x68, 0xd4, 0xf7, 0x4a, 0x4a,
42     0xd0, 0x57, 0x68, 0x76};
43 
44 class dwgReader18 : public dwgReader {
45 public:
dwgReader18(std::istream * stream,dwgR * p)46     dwgReader18(std::istream *stream, dwgR *p):dwgReader(stream, p){
47         objData = NULL;
48     }
~dwgReader18()49     virtual ~dwgReader18(){
50         if (objData != NULL)
51             delete[] objData;
52     }
53     bool readMetaData();
54     bool readFileHeader();
55     bool readDwgHeader(DRW_Header& hdr);
56     bool readDwgClasses();
57     bool readDwgHandles();
58     bool readDwgTables(DRW_Header& hdr);
readDwgBlocks(DRW_Interface & intfa)59     bool readDwgBlocks(DRW_Interface& intfa){
60         bool ret = true;
61         dwgBuffer dataBuf(objData, uncompSize, &decoder);
62         ret = dwgReader::readDwgBlocks(intfa, &dataBuf);
63         return ret;
64     }
65 
readDwgEntities(DRW_Interface & intfa)66     virtual bool readDwgEntities(DRW_Interface& intfa){
67         bool ret = true;
68         dwgBuffer dataBuf(objData, uncompSize, &decoder);
69         ret = dwgReader::readDwgEntities(intfa, &dataBuf);
70         return ret;
71     }
readDwgObjects(DRW_Interface & intfa)72     virtual bool readDwgObjects(DRW_Interface& intfa){
73         bool ret = true;
74         dwgBuffer dataBuf(objData, uncompSize, &decoder);
75         ret = dwgReader::readDwgObjects(intfa, &dataBuf);
76         return ret;
77     }
78 
79 //    bool readDwgEntity(objHandle& obj, DRW_Interface& intfa){
80 //        bool ret = true;
81 //        return ret;
82 //    }
83 
84 protected:
85     duint8 *objData;
86     duint64 uncompSize;
87 
88 private:
89     void genMagicNumber();
90 //    dwgBuffer* bufObj;
91     void parseSysPage(duint8 *decompSec, duint32 decompSize); //called: Section page map: 0x41630e3b
92     bool parseDataPage(dwgSectionInfo si/*, duint8 *dData*/); //called ???: Section map: 0x4163003b
93     duint32 checksum(duint32 seed, duint8* data, duint32 sz);
94 
95 private:
96 duint32 securityFlags;
97 };
98 
99 #endif // DWGREADER18_H
100