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/******************************************************************************
** libDXFrw - Library to read/write DXF files (ascii & binary) **
** **
** Copyright (C) 2011-2015 José F. Soriano, rallazz@gmail.com **
** **
** This library is free software, licensed under the terms of the GNU **
** General Public License as published by the Free Software Foundation, **
** either version 2 of the License, or (at your option) any later version. **
** You should have received a copy of the GNU General Public License **
** along with this program. If not, see <http://www.gnu.org/licenses/>. **
******************************************************************************/
#include <cstdlib>
#include <iostream>
#include <fstream>
#include <string>
#include <sstream>
#include "drw_dbg.h"
#include "dwgreader15.h"
#include "drw_textcodec.h"
#include "../libdwgr.h"
bool dwgReader15::readMetaData() {
version = parent->getVersion();
decoder.setVersion(version, false);
DRW_DBG("dwgReader15::readMetaData\n");
if (! fileBuf->setPosition(13))
return false;
previewImagePos = fileBuf->getRawLong32();
DRW_DBG("previewImagePos (seekerImageData) = "); DRW_DBG(previewImagePos);
/* MEASUREMENT system variable 2 bytes*/
duint16 meas = fileBuf->getRawShort16();
DRW_DBG("\nMEASUREMENT (0 = English, 1 = Metric)= "); DRW_DBG(meas);
duint16 cp = fileBuf->getRawShort16();
DRW_DBG("\ncodepage= "); DRW_DBG(cp); DRW_DBG("\n");
if (cp == 29) //TODO RLZ: locate wath code page and correct this
decoder.setCodePage("ANSI_1252", false);
if (cp == 30)
decoder.setCodePage("ANSI_1252", false);
return true;
}
bool dwgReader15::readFileHeader() {
bool ret = true;
DRW_DBG("dwgReader15::readFileHeader\n");
if (! fileBuf->setPosition(21))
return false;
duint32 count = fileBuf->getRawLong32();
DRW_DBG("count records= "); DRW_DBG(count); DRW_DBG("\n");
for (unsigned int i = 0; i < count; i++) {
duint8 rec = fileBuf->getRawChar8();
duint32 address = fileBuf->getRawLong32();
duint32 size = fileBuf->getRawLong32();
dwgSectionInfo si;
si.Id = rec;
si.size = size;
si.address = address;
if (rec == 0) {
DRW_DBG("\nSection HEADERS address= ");
DRW_DBG(address); DRW_DBG(" size= "); DRW_DBG(size);
sections[secEnum::HEADER] = si;
} else if (rec == 1) {
DRW_DBG("\nSection CLASSES address= ");
DRW_DBG(address); DRW_DBG(" size= "); DRW_DBG(size);
sections[secEnum::CLASSES] = si;
} else if (rec == 2) {
DRW_DBG("\nSection OBJECTS (handles) address= ");
DRW_DBG(address); DRW_DBG(" size= "); DRW_DBG(size);
sections[secEnum::HANDLES] = si;
} else if (rec == 3) {
DRW_DBG("\nSection UNKNOWN address= ");
DRW_DBG(address); DRW_DBG(" size= "); DRW_DBG(size);
sections[secEnum::UNKNOWNS] = si;
} else if (rec == 4) {
DRW_DBG("\nSection R14DATA (AcDb:Template) address= ");
DRW_DBG(address); DRW_DBG(" size= "); DRW_DBG(size);
sections[secEnum::TEMPLATE] = si;
} else if (rec == 5) {
DRW_DBG("\nSection R14REC5 (AcDb:AuxHeader) address= ");
DRW_DBG(address); DRW_DBG(" size= "); DRW_DBG(size);
sections[secEnum::AUXHEADER] = si;
} else {
std::cerr << "\nUnsupported section number\n";
}
}
if (! fileBuf->isGood())
return false;
DRW_DBG("\nposition after read section locator records= "); DRW_DBG(fileBuf->getPosition());
DRW_DBG(", bit are= "); DRW_DBG(fileBuf->getBitPos());
duint32 ckcrc = fileBuf->crc8(0,0,fileBuf->getPosition());
DRW_DBG("\nfile header crc8 0 result= "); DRW_DBG(ckcrc);
switch (count){
case 3:
ckcrc = ckcrc ^ 0xA598;
break;
case 4:
ckcrc = ckcrc ^ 0x8101;
break;
case 5:
ckcrc = ckcrc ^ 0x3CC4;
break;
case 6:
ckcrc = ckcrc ^ 0x8461;
}
DRW_DBG("\nfile header crc8 xor result= "); DRW_DBG(ckcrc);
DRW_DBG("\nfile header CRC= "); DRW_DBG(fileBuf->getRawShort16());
DRW_DBG("\nfile header sentinel= ");
checkSentinel(fileBuf, secEnum::FILEHEADER, false);
DRW_DBG("\nposition after read file header sentinel= "); DRW_DBG(fileBuf->getPosition());
DRW_DBG(", bit are= "); DRW_DBG(fileBuf->getBitPos());
DRW_DBG("\ndwgReader15::readFileHeader END\n");
return ret;
}
bool dwgReader15::readDwgHeader(DRW_Header& hdr){
DRW_DBG("dwgReader15::readDwgHeader\n");
dwgSectionInfo si = sections[secEnum::HEADER];
if (si.Id<0)//not found, ends
return false;
if (!fileBuf->setPosition(si.address))
return false;
duint8 *tmpByteStr = new duint8[si.size];
fileBuf->getBytes(tmpByteStr, si.size);
dwgBuffer buff(tmpByteStr, si.size, &decoder);
DRW_DBG("Header section sentinel= ");
checkSentinel(&buff, secEnum::HEADER, true);
bool ret = dwgReader::readDwgHeader(hdr, &buff, &buff);
delete[]tmpByteStr;
return ret;
}
bool dwgReader15::readDwgClasses(){
DRW_DBG("\ndwgReader15::readDwgClasses\n");
dwgSectionInfo si = sections[secEnum::CLASSES];
if (si.Id<0)//not found, ends
return false;
if (!fileBuf->setPosition(si.address))
return false;
DRW_DBG("classes section sentinel= ");
checkSentinel(fileBuf, secEnum::CLASSES, true);
duint32 size = fileBuf->getRawLong32();
if (size != (si.size - 38)) {
DRW_DBG("\nWARNING dwgReader15::readDwgClasses size are "); DRW_DBG(size);
DRW_DBG(" and secSize - 38 are "); DRW_DBG(si.size - 38); DRW_DBG("\n");
}
duint8 *tmpByteStr = new duint8[size];
fileBuf->getBytes(tmpByteStr, size);
dwgBuffer buff(tmpByteStr, size, &decoder);
size--; //reduce 1 byte instead of check pos + bitPos
while (size > buff.getPosition()) {
DRW_Class *cl = new DRW_Class();
cl->parseDwg(version, &buff, &buff);
classesmap[cl->classNum] = cl;
}
DRW_DBG("\nCRC: "); DRW_DBGH(fileBuf->getRawShort16());
DRW_DBG("\nclasses section end sentinel= ");
checkSentinel(fileBuf, secEnum::CLASSES, false);
bool ret = buff.isGood();
delete[]tmpByteStr;
return ret;
}
bool dwgReader15::readDwgHandles() {
DRW_DBG("\ndwgReader15::readDwgHandles\n");
dwgSectionInfo si = sections[secEnum::HANDLES];
if (si.Id<0)//not found, ends
return false;
bool ret = dwgReader::readDwgHandles(fileBuf, si.address, si.size);
return ret;
}
/*********** objects ************************/
/**
* Reads all the object referenced in the object map section of the DWG file
* (using their object file offsets)
*/
bool dwgReader15::readDwgTables(DRW_Header& hdr) {
bool ret = dwgReader::readDwgTables(hdr, fileBuf);
return ret;
}
/**
* Reads all the object referenced in the object map section of the DWG file
* (using their object file offsets)
*/
bool dwgReader15::readDwgBlocks(DRW_Interface& intfa) {
bool ret = true;
ret = dwgReader::readDwgBlocks(intfa, fileBuf);
return ret;
}
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