libraries/libdxfrw/src/drw_objects.cpp

/******************************************************************************
**  libDXFrw - Library to read/write DXF files (ascii & binary)              **
**                                                                           **
**  Copyright (C) 2016-2022 A. Stebich (librecad@mail.lordofbikes.de)        **
**  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 <iostream>
#include <cmath>
#include "drw_objects.h"


#include "intern/dxfreader.h"
#include "intern/dxfwriter.h"
#include "intern/dwgbuffer.h"
#include "intern/drw_dbg.h"
#include "intern/drw_reserve.h"
#include "intern/dwgutil.h"

//! Base class for tables entries
/*!
*  Base class for tables entries
 *
 *  DXF Format reference:
 *  https://documentation.help/AutoCAD-DXF
*  @author Rallaz
*/
bool DRW_TableEntry::parseCode(int code, dxfReader* reader) {
    switch (code) {
        case 5:
            handle = reader->getHandleId();
            break;
        case 330:
            parentHandle = reader->getHandleId();
            break;
        case 2:
            name = reader->getUtf8String();
            break;
        case 70:
            flags = reader->getInt32();
            break;
        case 1000:
        case 1001:
        case 1002:
        case 1003:
        case 1004:
        case 1005:
            extData.push_back(new DRW_Variant(code, reader->getString()));
            break;
        case 1010:
        case 1011:
        case 1012:
        case 1013:
            // don't trust in X, Y, Z order!
            if (nullptr != curr) {
                curr->setCoordX(reader->getDouble());
            }
            else {
                curr = new DRW_Variant(code, DRW_Coord(reader->getDouble(), 0.0, 0.0));
                extData.push_back(curr);
            }
            break;
        case 1020:
        case 1021:
        case 1022:
        case 1023:
            // don't trust in X, Y, Z order!
            if (nullptr != curr) {
                curr->setCoordY(reader->getDouble());
            }
            else {
                curr = new DRW_Variant(code, DRW_Coord(0.0, reader->getDouble(), 0.0));
                extData.push_back(curr);
            }
            break;
        case 1030:
        case 1031:
        case 1032:
        case 1033:
            // don't trust in X, Y, Z order!
            if (nullptr != curr) {
                curr->setCoordZ(reader->getDouble());
            }
            else {
                curr = new DRW_Variant(code, DRW_Coord(0.0, 0.0, reader->getDouble()));
                extData.push_back(curr);
            }
            break;
        case 1040:
        case 1041:
        case 1042:
            extData.push_back(new DRW_Variant(code, reader->getDouble()));
            break;
        case 1070:
        case 1071:
            extData.push_back(new DRW_Variant(code, reader->getInt32()));
            break;
        default:
            break;
    }

    return true;
}

bool DRW_TableEntry::parseDwg(DRW::Version version, dwgBuffer* buf, dwgBuffer* strBuf, duint32 bs) {
    DRW_DBG("\n***************************** parsing table entry *********************************************\n");
    objSize = 0;
    oType = buf->getObjType(version);
    DRW_DBG("Object type: ");
    DRW_DBG(oType);
    DRW_DBG(", ");
    DRW_DBGH(oType);
    if (version > DRW::AC1014 && version < DRW::AC1024) {
        //2000 to 2007
        objSize = buf->getRawLong32(); //RL 32bits object size in bits
        DRW_DBG(" Object size: ");
        DRW_DBG(objSize);
        DRW_DBG("\n");
    }
    if (version > DRW::AC1021) {
        //2010+
        duint32 ms = buf->size();
        objSize = ms * 8 - bs;
        DRW_DBG(" Object size: ");
        DRW_DBG(objSize);
        DRW_DBG("\n");
    }
    if (strBuf != NULL && version > DRW::AC1018) {
        //2007+
        strBuf->moveBitPos(objSize - 1);
        DRW_DBG(" strBuf strbit pos 2007: ");
        DRW_DBG(strBuf->getPosition());
        DRW_DBG(" strBuf bpos 2007: ");
        DRW_DBG(strBuf->getBitPos());
        DRW_DBG("\n");
        if (strBuf->getBit() == 1) {
            DRW_DBG("DRW_TableEntry::parseDwg string bit is 1\n");
            strBuf->moveBitPos(-17);
            duint16 strDataSize = strBuf->getRawShort16();
            DRW_DBG("\nDRW_TableEntry::parseDwg string strDataSize: ");
            DRW_DBGH(strDataSize);
            DRW_DBG("\n");
            if ((strDataSize & 0x8000) == 0x8000) {
                DRW_DBG("\nDRW_TableEntry::parseDwg string 0x8000 bit is set");
                strBuf->moveBitPos(-33); //RLZ pending to verify
                duint16 hiSize = strBuf->getRawShort16();
                strDataSize = ((strDataSize & 0x7fff) | (hiSize << 15));
            }
            strBuf->moveBitPos(-strDataSize - 16); //-14
            DRW_DBG("strBuf start strDataSize pos 2007: ");
            DRW_DBG(strBuf->getPosition());
            DRW_DBG(" strBuf bpos 2007: ");
            DRW_DBG(strBuf->getBitPos());
            DRW_DBG("\n");
        }
        else
            DRW_DBG("\nDRW_TableEntry::parseDwg string bit is 0");
        DRW_DBG("strBuf start pos 2007: ");
        DRW_DBG(strBuf->getPosition());
        DRW_DBG(" strBuf bpos 2007: ");
        DRW_DBG(strBuf->getBitPos());
        DRW_DBG("\n");
    }

    dwgHandle ho = buf->getHandle();
    handle = ho.ref;
    DRW_DBG("TableEntry Handle: ");
    DRW_DBGHL(ho.code, ho.size, ho.ref);
    dint16 extDataSize = buf->getBitShort(); //BS
    DRW_DBG(" ext data size: ");
    DRW_DBG(extDataSize);
    while (extDataSize > 0 && buf->isGood()) {
        /* RLZ: TODO */
        dwgHandle ah = buf->getHandle();
        DRW_DBG("App Handle: ");
        DRW_DBGHL(ah.code, ah.size, ah.ref);
        duint8* tmpExtData = new duint8[extDataSize];
        buf->getBytes(tmpExtData, extDataSize);
        dwgBuffer tmpExtDataBuf(tmpExtData, extDataSize, buf->decoder);
        int pos = tmpExtDataBuf.getPosition();
        int bpos = tmpExtDataBuf.getBitPos();
        DRW_DBG("ext data pos: ");
        DRW_DBG(pos);
        DRW_DBG(".");
        DRW_DBG(bpos);
        DRW_DBG("\n");
        duint8 dxfCode = tmpExtDataBuf.getRawChar8();
        DRW_DBG(" dxfCode: ");
        DRW_DBG(dxfCode);
        switch (dxfCode) {
            case 0: {
                duint8 strLength = tmpExtDataBuf.getRawChar8();
                DRW_DBG(" strLength: ");
                DRW_DBG(strLength);
                duint16 cp = tmpExtDataBuf.getBERawShort16();
                DRW_DBG(" str codepage: ");
                DRW_DBG(cp);
                for (int i = 0; i < strLength + 1; i++) {
                    //string length + null terminating char
                    duint8 dxfChar = tmpExtDataBuf.getRawChar8();
                    DRW_DBG(" dxfChar: ");
                    DRW_DBG(dxfChar);
                }
                break;
            }
            default:
                /* RLZ: TODO */
                break;
        }
        DRW_DBG("ext data pos: ");
        DRW_DBG(tmpExtDataBuf.getPosition());
        DRW_DBG(".");
        DRW_DBG(tmpExtDataBuf.getBitPos());
        DRW_DBG("\n");
        delete[]tmpExtData;
        extDataSize = buf->getBitShort(); //BS
        DRW_DBG(" ext data size: ");
        DRW_DBG(extDataSize);
    } //end parsing extData (EED)
    if (version < DRW::AC1015) {
        //14-
        objSize = buf->getRawLong32(); //RL 32bits size in bits
    }
    DRW_DBG(" objSize in bits: ");
    DRW_DBG(objSize);

    numReactors = buf->getBitLong(); //BL
    DRW_DBG(", numReactors: ");
    DRW_DBG(numReactors);
    DRW_DBG("\n");
    if (version > DRW::AC1015) {
        //2004+
        xDictFlag = buf->getBit();
        DRW_DBG("xDictFlag: ");
        DRW_DBG(xDictFlag);
    }
    if (version > DRW::AC1024) {
        //2013+
        duint8 bd = buf->getBit();
        DRW_DBG(" Have binary data: ");
        DRW_DBG(bd);
        DRW_DBG("\n");
    }
    return buf->isGood();
}

bool DRW_Dimstyle::get(const std::string& key, ValueHolder& holder) const {
    auto pair = vars.find(key);
    if (pair == vars.end()) {
        holder.update(nullptr);
        return false;
    }
    holder.update(pair->second);
    return true;
}

bool DRW_Dimstyle::get(const std::string& key, double& var) const {
    auto pair = vars.find(key);
    if (pair == vars.end()) {
        return false;
    }
    var = pair->second->d_val();
    return true;
}

bool DRW_Dimstyle::get(const std::string& key, int& var) const {
    auto pair = vars.find(key);
    if (pair == vars.end()) {
        return false;
    }
    var = pair->second->i_val();
    return true;
}

bool DRW_Dimstyle::get(const std::string& key, std::string& var) const {
    auto pair = vars.find(key);
    if (pair == vars.end()) {
        return false;
    }
    var = pair->second->c_str();
    return true;
}

void DRW_Dimstyle::add(const std::string& key, int code, int value) {
    vars[key] = new DRW_Variant(code, value);
}

void DRW_Dimstyle::add(const std::string& key, int code, double value) {
    vars[key] = new DRW_Variant(code, value);
}

void DRW_Dimstyle::add(const std::string& key, int code, std::string value) {
    vars[key] = new DRW_Variant(code, value);
}

//! Class to handle dimstyle entries
/*!
*  Class to handle ldim style symbol table entries
*  @author Rallaz
*/

bool DRW_Dimstyle::parseCode(int code, dxfReader* reader) {
    int refHandle;
    switch (code) {
        case 105:
            handle = reader->getHandleId();
            break;
        case 3:
            dimpost = reader->getUtf8String();
            add("$DIMPOST", code, dimpost);
            break;
        case 4:
            dimapost = reader->getUtf8String();
            add("$DIMAPOST", code, dimapost);
            break;
        case 5:
            dimblk = reader->getUtf8String();
            add("$DIMBLK", code, dimblk);
            break;
        case 6:
            dimblk1 = reader->getUtf8String();
            add("$DIMBLK1", code, dimblk1);
            break;
        case 7:
            dimblk2 = reader->getUtf8String();
            add("$DIMBLK2", code, dimblk2);
            break;
        case 40:
            dimscale = reader->getDouble();
            add("$DIMSCALE", code, dimscale);
            break;
        case 41:
            dimasz = reader->getDouble();
            add("$DIMASZ", code, dimasz);
            break;
        case 42:
            dimexo = reader->getDouble();
            add("$DIMEXO", code, dimexo);
            break;
        case 43:
            dimdli = reader->getDouble();
            add("$DIMDLI", code, dimdli);
            break;
        case 44:
            dimexe = reader->getDouble();
            add("$DIMEXE", code, dimexe);
            break;
        case 45:
            dimrnd = reader->getDouble();
            add("$DIMRND", code, dimrnd);
            break;
        case 46:
            dimdle = reader->getDouble();
            add("$DIMDLE", code, dimdle);
            break;
        case 47:
            dimtp = reader->getDouble();
            add("$DIMTP", code, dimtp);
            break;
        case 48:
            dimtm = reader->getDouble();
            add("$DIMTM", code, dimtm);
            break;
        case 49:
            dimfxl = reader->getDouble();
            add("$DIMFXL", code, dimfxl);
            break;
        case 140:
            dimtxt = reader->getDouble();
            add("$DIMTXT", code, dimtxt);
            break;
        case 141:
            dimcen = reader->getDouble();
            add("$DIMCEN", code, dimcen);
            break;
        case 142:
            dimtsz = reader->getDouble();
            add("$DIMTSZ", code, dimtsz);
            break;
        case 143:
            dimaltf = reader->getDouble();
            add("$DIMALTF", code, dimaltf);
            break;
        case 144:
            dimlfac = reader->getDouble();
            add("$DIMLFAC", code, dimlfac);
            break;
        case 145:
            dimtvp = reader->getDouble();
            add("$DIMTVP", code, dimtvp);
            break;
        case 146:
            dimtfac = reader->getDouble();
            add("$DIMTFAC", code, dimtfac);
            break;
        case 147:
            dimgap = reader->getDouble();
            add("$DIMGAP", code, dimgap);
            break;
        case 148:
            dimaltrnd = reader->getDouble();
            add("$DIMALTRND", code, dimaltrnd);
            break;
        case 69:
            dimtfill = reader->getInt32();
            add("$DIMTFILL", code, dimtfill);
            break;
        case 70:
            dimtfillclr = reader->getInt32();
            add("$DIMTFILLCLR", code, dimtfillclr);
            break;
        case 71:
            dimtol = reader->getInt32();
            add("$DIMTOL", code, dimtol);
            break;
        case 72:
            dimlim = reader->getInt32();
            add("$DIMLIM", code, dimlim);
            break;
        case 73:
            dimtih = reader->getInt32();
            add("$DIMTIH", code, dimtih);
            break;
        case 74:
            dimtoh = reader->getInt32();
            add("$DIMTOH", code, dimtoh);
            break;
        case 75:
            dimse1 = reader->getInt32();
            add("$DIMSE1", code, dimse1);
            break;
        case 76:
            dimse2 = reader->getInt32();
            add("$DIMSE2", code, dimse2);
            break;
        case 77:
            dimtad = reader->getInt32();
            add("$DIMTAD", code, dimtad);
            break;
        case 78:
            dimzin = reader->getInt32();
            add("$DIMZIN", code, dimzin);
            break;
        case 79:
            dimazin = reader->getInt32();
            add("$DIMAZIN", code, dimazin);
            break;
        case 170:
            dimalt = reader->getInt32();
            add("$DIMALT", code, dimalt);
            break;
        case 171:
            dimaltd = reader->getInt32();
            add("$DIMALTD", code, dimaltd);
            break;
        case 172:
            dimtofl = reader->getInt32();
            add("$DIMTOFL", code, dimtofl);
            break;
        case 173:
            dimsah = reader->getInt32();
            add("$DIMSAH", code, dimsah);
            break;
        case 174:
            dimtix = reader->getInt32();
            add("$DIMTIX", code, dimtix);
            break;
        case 175:
            dimsoxd = reader->getInt32();
            add("$DIMSOXD", code, dimsoxd);
            break;
        case 176:
            dimclrd = reader->getInt32();
            add("$DIMCLRD", code, dimclrd);
            break;
        case 177:
            dimclre = reader->getInt32();
            add("$DIMCLRE", code, dimclre);
            break;
        case 178:
            dimclrt = reader->getInt32();
            add("$DIMCLRT", code, dimclrt);
            break;
        case 179:
            dimadec = reader->getInt32();
            add("$DIMADEC", code, dimadec);
            break;
        case 270:
            dimunit = reader->getInt32();
            add("$DIMUNIT", code, dimunit);
            break;
        case 271:
            dimdec = reader->getInt32();
            add("$DIMDEC", code, dimdec);
            break;
        case 272:
            dimtdec = reader->getInt32();
            add("$DIMTDEC", code, dimtdec);
            break;
        case 273:
            dimaltu = reader->getInt32();
            add("$DIMALTU", code, dimaltu);
            break;
        case 274:
            dimalttd = reader->getInt32();
            add("$DIMALTTD", code, dimalttd);
            break;
        case 275:
            dimaunit = reader->getInt32();
            add("$DIMAUNIT", code, dimaunit);
            break;
        case 276:
            dimfrac = reader->getInt32();
            add("$DIMFRAC", code, dimfrac);
            break;
        case 277:
            dimlunit = reader->getInt32();
            add("$DIMLUNIT", code, dimlunit);
            break;
        case 278:
            dimdsep = reader->getInt32();
            add("$DIMDSEP", code, dimdsep);
            break;
        case 279:
            dimtmove = reader->getInt32();
            add("$DIMTMOVE", code, dimtmove);
            break;
        case 280:
            dimjust = reader->getInt32();
            add("$DIMJUST", code, dimjust);
            break;
        case 281:
            dimsd1 = reader->getInt32();
            add("$DIMSD1", code, dimsd1);
            break;
        case 282:
            dimsd2 = reader->getInt32();
            add("$DIMSD2", code, dimsd2);
            break;
        case 283:
            dimtolj = reader->getInt32();
            add("$DIMTOLJ", code, dimtolj);
            break;
        case 284:
            dimtzin = reader->getInt32();
            add("$DIMTZIN", code, dimtzin);
            break;
        case 285:
            dimaltz = reader->getInt32();
            add("$DIMALTZ", code, dimaltz);
            break;
        case 286:
            dimaltttz = reader->getInt32();
            add("$DIMALTTZ", code, dimaltttz);
            break;
        case 287:
            dimfit = reader->getInt32();
            add("$DIMFIT", code, dimfit);
            break;
        case 288:
            dimupt = reader->getInt32();
            add("$DIMUPT", code, dimupt);
            break;
        case 289:
            dimatfit = reader->getInt32();
            add("$DIMATFIT", code, dimatfit);
            break;
        case 290:
            dimfxlon = reader->getInt32();
            add("$DIMFXLON", code, dimfxlon);
            break;
        case 292:
            dimtxtdirection = reader->getInt32();
            add("$DIMTXTDIRECTION", code, dimtxtdirection);
            break;
        case 340:
            /*dimtxsty = reader->getUtf8String();
            add("$DIMTXSTY", code, dimtxsty);*/
            refHandle = reader->getHandleId();
            add("_$DIMTXSTY", code, refHandle);
            break;
        case 341:
            // fixme - DIMLDRBLK reading!
            refHandle = reader->getHandleId();
            add("_$DIMLDRBLK", code, refHandle);
            break;
        case 342:
            // dimblk = reader->getHandleString();
            refHandle = reader->getHandleId();
            add("_$DIMBLK", code, refHandle);
            break;
        case 343:
            // dimblk1 = reader->getHandleString();
            refHandle = reader->getHandleId();
            add("_$DIMBLK1", code, refHandle);
            break;
        case 344:
            refHandle = reader->getHandleId();
            add("_$DIMBLK2", code, refHandle);
            break;
        // case 345: // codes///
        // fixme - may this code be used for DIMLDRBLK?
        //      dimblk2 = reader->getUtf8String();
        //      add("$DIMBLK2", code, dimblk2);
        //      break;

        // case 346:
        case 345:
            dimltype = reader->getHandleId();
            add("_$DIMLTYPE", code, dimltype);
            break;
        case 347:
            dimltext1 = reader->getHandleId();
            add("_$DIMLTEX1", code, dimltext1);
            break;
        case 348:
            dimltext2 = reader->getHandleId();
            add("_$DIMLTEX2", code, dimltext2);
            break;
        case 371:
            dimlwd = reader->getInt32();
            add("$DIMLWD", code, dimlwd);
            break;
        case 372:
            dimlwe = reader->getInt32();
            add("$DIMLWE", code, dimlwe);
            break;
        case 90:
            dymarcsym = reader->getInt32();
            add("$DIMARCSYM", code, dymarcsym);
            break;
        default:
            return DRW_TableEntry::parseCode(code, reader);
    }

    return true;
}

DRW_Dimstyle::~DRW_Dimstyle() {
    vars.clear();
}

DRW_Variant* DRW_Dimstyle::get(const std::string& key) const {
    auto pair = vars.find(key);
    if (pair == vars.end()) {
        return nullptr;
    }
    return pair->second;
}

void DRW_Dimstyle::resolveBlockRecordNameByHandle(DRW_ParsingContext& ctx,
                                            const std::string& unresolvedKey, const std::string& resolvedKey,
                                            int code) {
    auto var = get(unresolvedKey);
    if (var != nullptr) {
        duint32 blockHandle = var->i_val();
        auto name = ctx.resolveBlockRecordName(blockHandle);
        if (!name.empty()) {
            add(resolvedKey, code, name);
        }
    }
}

void DRW_Dimstyle::resolveTextStyleNameByHandle(DRW_ParsingContext& ctx,
                                            const std::string& unresolvedKey, const std::string& resolvedKey,
                                            int code) {
    auto var = get(unresolvedKey);
    if (var != nullptr) {
        duint32 blockHandle = var->i_val();
        auto name = ctx.resolveTextStyleName(blockHandle);
        if (!name.empty()) {
            add(resolvedKey, code, name);
        }
    }
}


void DRW_Dimstyle::resolveLineTypeNameByHandle(DRW_ParsingContext& ctx,
                                            const std::string& unresolvedKey, const std::string& resolvedKey,
                                            int code) {
    auto var = get(unresolvedKey);
    if (var != nullptr) {
        duint32 blockHandle = var->i_val();
        auto name = ctx.resolveLineTypeName(blockHandle);
        if (!name.empty()) {
            add(resolvedKey, code, name);
        }
    }
}

bool DRW_Dimstyle::resolveRefs(DRW_ParsingContext& ctx) {
    resolveTextStyleNameByHandle(ctx, "_$DIMTXSTY", "$DIMTXSTY", 340);

    resolveBlockRecordNameByHandle(ctx, "_$DIMLDRBLK", "$DIMLDRBLK", 341);
    resolveBlockRecordNameByHandle(ctx, "_$DIMBLK", "$DIMBLK", 342);
    resolveBlockRecordNameByHandle(ctx, "_$DIMBLK1", "$DIMBLK1", 343);
    resolveBlockRecordNameByHandle(ctx, "_$DIMBLK2", "$DIMBLK2", 344);

    resolveLineTypeNameByHandle(ctx, "_$DIMLTYPE", "$DIMLTYPE", 345);
    resolveLineTypeNameByHandle(ctx, "_$DIMLTEX1", "$DIMLTEX1", 347);
    resolveLineTypeNameByHandle(ctx, "_$DIMLTEX2", "$DIMLTEX2", 348);

    return false;
}

bool DRW_Dimstyle::parseDwg(DRW::Version version, dwgBuffer* buf, duint32 bs) {
    dwgBuffer sBuff = *buf;
    dwgBuffer* sBuf = buf;
    if (version > DRW::AC1018) {
        //2007+
        sBuf = &sBuff; //separate buffer for strings
    }
    bool ret = DRW_TableEntry::parseDwg(version, buf, sBuf, bs);
    DRW_DBG("\n***************************** parsing dimension style **************************************\n");
    if (!ret)
        return ret;
    name = sBuf->getVariableText(version, false);
    DRW_DBG("dimension style name: ");
    DRW_DBG(name.c_str());
    DRW_DBG("\n");

    //    handleObj = shpControlH.ref;
    DRW_DBG("\n Remaining bytes: ");
    DRW_DBG(buf->numRemainingBytes());
    DRW_DBG("\n");
    //    RS crc;   //RS */
    return buf->isGood();
}

DRW_TableEntry* DRW_LType::newInstance() {
    return new DRW_LType();
}

//! Class to handle line type entries
/*!
*  Class to handle line type symbol table entries
*  @author Rallaz
*/
bool DRW_LType::parseCode(int code, dxfReader* reader) {
    switch (code) {
        case 3:
            desc = reader->getUtf8String();
            break;
        case 73:
            size = reader->getInt32();
            path.clear();
            if (!DRW::reserve(path, size)) {
                return false;
            }
            break;
        case 40:
            length = reader->getDouble();
            break;
        case 49:
            path.push_back(reader->getDouble());
            pathIdx++;
            break;
        /*    case 74:
                haveShape = reader->getInt32();
                break;*/
        default:
            return DRW_TableEntry::parseCode(code, reader);
    }

    return true;
}

//! Update line type
/*!
*  Update the size and length of line type according to the path
*  @author Rallaz
*/
/*TODO: control max length permited */
void DRW_LType::update() {
    double d = 0;
    size = path.size();
    for (int i = 0; i < size; i++) {
        d += fabs(path.at(i));
    }
    length = d;
}

bool DRW_LType::parseDwg(DRW::Version version, dwgBuffer* buf, duint32 bs) {
    dwgBuffer sBuff = *buf;
    dwgBuffer* sBuf = buf;
    if (version > DRW::AC1018) {
        //2007+
        sBuf = &sBuff; //separate buffer for strings
    }
    bool ret = DRW_TableEntry::parseDwg(version, buf, sBuf, bs);
    DRW_DBG("\n***************************** parsing line type *********************************************\n");
    if (!ret)
        return ret;
    name = sBuf->getVariableText(version, false);
    DRW_DBG("linetype name: ");
    DRW_DBG(name.c_str());
    DRW_DBG("\n");
    flags = buf->getBit() << 6;
    DRW_DBG("flags: ");
    DRW_DBG(flags);
    if (version > DRW::AC1018) {
        //2007+
    }
    else {
        //2004- //RLZ: verify in 2004, 2010 &2013
        dint16 xrefindex = buf->getBitShort();
        DRW_DBG(" xrefindex: ");
        DRW_DBG(xrefindex);
    }
    duint8 xdep = buf->getBit();
    DRW_DBG(" xdep: ");
    DRW_DBG(xdep);
    flags |= xdep << 4;
    DRW_DBG(" flags: ");
    DRW_DBG(flags);
    desc = sBuf->getVariableText(version, false);
    DRW_DBG(" desc: ");
    DRW_DBG(desc.c_str());
    length = buf->getBitDouble();
    DRW_DBG(" pattern length: ");
    DRW_DBG(length);
    char align = buf->getRawChar8();
    DRW_DBG(" align: ");
    DRW_DBG(std::string(&align, 1));
    size = buf->getRawChar8();
    DRW_DBG(" num dashes, size: ");
    DRW_DBG(size);
    DRW_DBG("\n    dashes:\n");
    bool haveStrArea = false;
    for (int i = 0; i < size; i++) {
        path.push_back(buf->getBitDouble());
        /*int bs1 =*/
        buf->getBitShort();
        /*double d1= */
        buf->getRawDouble();
        /*double d2=*/
        buf->getRawDouble();
        /*double d3= */
        buf->getBitDouble();
        /*double d4= */
        buf->getBitDouble();
        int bs2 = buf->getBitShort();
        if ((bs2 & 2) != 0) haveStrArea = true;
    }
    for (unsigned i = 0; i < path.size(); i++) {
        DRW_DBG(", ");
        DRW_DBG(path[i]);
        DRW_DBG("\n");
    }
    DRW_DBG("\n Remaining bytes: ");
    DRW_DBG(buf->numRemainingBytes());
    DRW_DBG("\n");
    if (version < DRW::AC1021) {
        //2004-
        duint8 strarea[256];
        buf->getBytes(strarea, 256);
        DRW_DBG("string area 256 bytes:\n");
        DRW_DBG(reinterpret_cast<char*>(strarea));
        DRW_DBG("\n");
    }
    else {
        //2007+
        //first verify flag
        if (haveStrArea) {
            duint8 strarea[512];
            buf->getBytes(strarea, 512);
            DRW_DBG("string area 512 bytes:\n");
            DRW_DBG(reinterpret_cast<char*>(strarea));
            DRW_DBG("\n");
        }
        else
            DRW_DBG("string area 512 bytes not present\n");
    }

    if (version > DRW::AC1021) {
        //2007+ skip string area
        DRW_DBG(" ltype end of object data pos 2010: ");
        DRW_DBG(buf->getPosition());
        DRW_DBG(" strBuf bpos 2007: ");
        DRW_DBG(buf->getBitPos());
        DRW_DBG("\n");
    }
    if (version > DRW::AC1018) {
        //2007+ skip string area
        buf->setPosition(objSize >> 3);
        buf->setBitPos(objSize & 7);
    }

    if (version > DRW::AC1021) {
        //2007+ skip string area
        DRW_DBG(" ltype start of handles data pos 2010: ");
        DRW_DBG(buf->getPosition());
        DRW_DBG(" strBuf bpos 2007: ");
        DRW_DBG(buf->getBitPos());
        DRW_DBG("\n");
    }

    DRW_DBG("\n Remaining bytes: ");
    DRW_DBG(buf->numRemainingBytes());
    DRW_DBG("\n");
    dwgHandle ltControlH = buf->getHandle();
    DRW_DBG("linetype control Handle: ");
    DRW_DBGHL(ltControlH.code, ltControlH.size, ltControlH.ref);
    parentHandle = ltControlH.ref;
    DRW_DBG("\n Remaining bytes: ");
    DRW_DBG(buf->numRemainingBytes());
    DRW_DBG("\n");
    for (int i = 0; i < numReactors; ++i) {
        dwgHandle reactorsH = buf->getHandle();
        DRW_DBG(" reactorsH control Handle: ");
        DRW_DBGHL(reactorsH.code, reactorsH.size, reactorsH.ref);
        DRW_DBG("\n");
    }
    if (xDictFlag != 1) {
        //linetype in 2004 seems not have XDicObjH or NULL handle
        dwgHandle XDicObjH = buf->getHandle();
        DRW_DBG(" XDicObj control Handle: ");
        DRW_DBGHL(XDicObjH.code, XDicObjH.size, XDicObjH.ref);
        DRW_DBG("\n");
        DRW_DBG("\n Remaining bytes: ");
        DRW_DBG(buf->numRemainingBytes());
        DRW_DBG("\n");
    }
    if (size > 0) {
        dwgHandle XRefH = buf->getHandle();
        DRW_DBG(" XRefH control Handle: ");
        DRW_DBGHL(XRefH.code, XRefH.size, XRefH.ref);
        DRW_DBG("\n");
        dwgHandle shpHandle = buf->getHandle();
        DRW_DBG(" shapeFile Handle: ");
        DRW_DBGHL(shpHandle.code, shpHandle.size, shpHandle.ref);
        DRW_DBG("\n Remaining bytes: ");
        DRW_DBG(buf->numRemainingBytes());
        DRW_DBG("\n");
    }
    dwgHandle shpHandle = buf->getHandle();
    DRW_DBG(" shapeFile +1 Handle ??: ");
    DRW_DBGHL(shpHandle.code, shpHandle.size, shpHandle.ref);
    DRW_DBG("\n");

    DRW_DBG("\n Remaining bytes: ");
    DRW_DBG(buf->numRemainingBytes());
    DRW_DBG("\n");
    //    RS crc;   //RS */
    return buf->isGood();
}

//! Class to handle layer entries
/*!
*  Class to handle layer symbol table entries
*  @author Rallaz
*/
bool DRW_Layer::parseCode(int code, dxfReader* reader) {
    switch (code) {
        case 6:
            lineType = reader->getUtf8String();
            break;
        case 62:
            color = reader->getInt32();
            break;
        case 290:
            plotF = reader->getBool();
            break;
        case 370:
            lWeight = DRW_LW_Conv::dxfInt2lineWidth(reader->getInt32());
            break;
        case 390:
            handlePlotS = reader->getString();
            break;
        case 347:
            handleMaterialS = reader->getString();
            break;
        case 420:
            color24 = reader->getInt32();
            break;
        default:
            return DRW_TableEntry::parseCode(code, reader);
    }

    return true;
}

bool DRW_Layer::parseDwg(DRW::Version version, dwgBuffer* buf, duint32 bs) {
    dwgBuffer sBuff = *buf;
    dwgBuffer* sBuf = buf;
    if (version > DRW::AC1018) {
        //2007+
        sBuf = &sBuff; //separate buffer for strings
    }
    bool ret = DRW_TableEntry::parseDwg(version, buf, sBuf, bs);
    DRW_DBG("\n***************************** parsing layer *********************************************\n");
    if (!ret)
        return ret;
    name = sBuf->getVariableText(version, false);
    DRW_DBG("layer name: ");
    DRW_DBG(name.c_str());

    flags |= buf->getBit() << 6; //layer have entity
    if (version < DRW::AC1021) {
        //2004-
        DRW_DBG(", xrefindex = ");
        DRW_DBG(buf->getBitShort());
        DRW_DBG("\n");
        //dint16 xrefindex = buf->getBitShort();
    }
    flags |= buf->getBit() << 4; //is refx dependent
    if (version < DRW::AC1015) {
        //14-
        flags |= buf->getBit(); //layer frozen
        /*flags |=*/
        buf->getBit(); //unused, negate the color
        flags |= buf->getBit() << 1; //frozen in new
        flags |= buf->getBit() << 3; //locked
    }
    if (version > DRW::AC1014) {
        //2000+
        dint16 f = buf->getSBitShort(); //bit2 are layer on
        DRW_DBG(", flags 2000+: ");
        DRW_DBG(f);
        DRW_DBG("\n");
        flags |= f & 0x0001; //layer frozen
        flags |= (f >> 1) & 0x0002; //frozen in new
        flags |= (f >> 1) & 0x0004; //locked
        plotF = (f >> 4) & 0x0001;
        lWeight = DRW_LW_Conv::dwgInt2lineWidth((f & 0x03E0) >> 5);
    }
    color = buf->getCmColor(version); //BS or CMC //ok for R14 or negate
    DRW_DBG(", entity color: ");
    DRW_DBG(color);
    DRW_DBG("\n");

    if (version > DRW::AC1018) {
        //2007+ skip string area
        buf->setPosition(objSize >> 3);
        buf->setBitPos(objSize & 7);
    }
    dwgHandle layerControlH = buf->getHandle();
    DRW_DBG("layer control Handle: ");
    DRW_DBGHL(layerControlH.code, layerControlH.size, layerControlH.ref);
    parentHandle = layerControlH.ref;

    if (xDictFlag != 1) {
        //linetype in 2004 seems not have XDicObjH or NULL handle
        dwgHandle XDicObjH = buf->getHandle();
        DRW_DBG(" XDicObj control Handle: ");
        DRW_DBGHL(XDicObjH.code, XDicObjH.size, XDicObjH.ref);
        DRW_DBG("\n");
    }
    dwgHandle XRefH = buf->getHandle();
    DRW_DBG(" XRefH control Handle: ");
    DRW_DBGHL(XRefH.code, XRefH.size, XRefH.ref);
    DRW_DBG("\n");
    if (version > DRW::AC1014) {
        //2000+
        dwgHandle plotStyH = buf->getHandle();
        DRW_DBG(" PLot style control Handle: ");
        DRW_DBGHL(plotStyH.code, plotStyH.size, plotStyH.ref);
        DRW_DBG("\n");
        handlePlotS = DRW::toHexStr(plotStyH.ref); // std::string(plotStyH.ref);//RLZ: verify conversion
    }
    if (version > DRW::AC1018) {
        //2007+
        dwgHandle materialH = buf->getHandle();
        DRW_DBG(" Material control Handle: ");
        DRW_DBGHL(materialH.code, materialH.size, materialH.ref);
        DRW_DBG("\n");
        handleMaterialS = DRW::toHexStr(materialH.ref); //RLZ: verify conversion
    }
    //lineType handle
    DRW_DBG("Remaining bytes: ");
    DRW_DBG(buf->numRemainingBytes());
    DRW_DBG("\n");
    lTypeH = buf->getHandle();
    DRW_DBG("line type Handle: ");
    DRW_DBGHL(lTypeH.code, lTypeH.size, lTypeH.ref);
    DRW_DBG("\n Remaining bytes: ");
    DRW_DBG(buf->numRemainingBytes());
    DRW_DBG("\n");
    //    RS crc;   //RS */
    return buf->isGood();
}

DRW_TableEntry* DRW_Block_Record::newInstance() {
    return new DRW_Block_Record();
}

bool DRW_Block_Record::parseDwg(DRW::Version version, dwgBuffer* buf, duint32 bs) {
    dwgBuffer sBuff = *buf;
    dwgBuffer* sBuf = buf;
    if (version > DRW::AC1018) {
        //2007+
        sBuf = &sBuff; //separate buffer for strings
    }
    bool ret = DRW_TableEntry::parseDwg(version, buf, sBuf, bs);
    DRW_DBG("\n***************************** parsing block record ******************************************\n");
    if (!ret)
        return ret;
    duint32 insertCount = 0; //only 2000+
    duint32 objectCount = 0; //only 2004+

    name = sBuf->getVariableText(version, false);
    DRW_DBG("block record name: ");
    DRW_DBG(name.c_str());
    DRW_DBG("\n");

    flags |= buf->getBit() << 6; //referenced external reference, block code 70, bit 7 (64)
    if (version > DRW::AC1018) {
        //2007+
    }
    else {
        //2004- //RLZ: verify in 2004, 2010 &2013
        dint16 xrefindex = buf->getBitShort();
        DRW_DBG(" xrefindex: ");
        DRW_DBG(xrefindex);
        DRW_DBG("\n");
    }
    flags |= buf->getBit() << 4; //is refx dependent, block code 70, bit 5 (16)
    flags |= buf->getBit(); //if is anonymous block (*U) block code 70, bit 1 (1)
    flags |= buf->getBit() << 1; //if block contains attdefs, block code 70, bit 2 (2)
    bool blockIsXref = buf->getBit(); //if is a Xref, block code 70, bit 3 (4)
    bool xrefOverlaid = buf->getBit(); //if is a overlaid Xref, block code 70, bit 4 (8)
    flags |= blockIsXref << 2; //if is a Xref, block code 70, bit 3 (4)
    flags |= xrefOverlaid << 3; //if is a overlaid Xref, block code 70, bit 4 (8)
    if (version > DRW::AC1014) {
        //2000+
        flags |= buf->getBit() << 5; //if is a loaded Xref, block code 70, bit 6 (32)
    }
    DRW_DBG("flags: ");
    DRW_DBG(flags);
    DRW_DBG(", ");
    if (version > DRW::AC1015) {
        //2004+ fails in 2007
        objectCount = buf->getBitLong(); //Number of objects owned by this block
        if (!DRW::reserve(entMap, objectCount)) {
            return false;
        }
    }
    basePoint.x = buf->getBitDouble();
    basePoint.y = buf->getBitDouble();
    basePoint.z = buf->getBitDouble();
    DRW_DBG("insertion point: ");
    DRW_DBGPT(basePoint.x, basePoint.y, basePoint.z);
    DRW_DBG("\n");
    UTF8STRING path = sBuf->getVariableText(version, false);
    DRW_DBG("XRef path name: ");
    DRW_DBG(path.c_str());
    DRW_DBG("\n");

    if (version > DRW::AC1014) {
        //2000+
        insertCount = 0;
        while (duint8 i = buf->getRawChar8() != 0)
            insertCount += i;
        UTF8STRING bkdesc = sBuf->getVariableText(version, false);
        DRW_DBG("Block description: ");
        DRW_DBG(bkdesc.c_str());
        DRW_DBG("\n");

        duint32 prevData = buf->getBitLong();
        for (unsigned int j = 0; j < prevData; ++j)
            buf->getRawChar8();
    }
    if (version > DRW::AC1018) {
        //2007+
        duint16 insUnits = buf->getBitShort();
        bool canExplode = buf->getBit(); //if block can be exploded
        duint8 bkScaling = buf->getRawChar8();

        DRW_UNUSED(insUnits);
        DRW_UNUSED(canExplode);
        DRW_UNUSED(bkScaling);
    }

    if (version > DRW::AC1018) {
        //2007+ skip string area
        buf->setPosition(objSize >> 3);
        buf->setBitPos(objSize & 7);
    }

    dwgHandle blockControlH = buf->getHandle();
    DRW_DBG("block control Handle: ");
    DRW_DBGHL(blockControlH.code, blockControlH.size, blockControlH.ref);
    DRW_DBG("\n");
    parentHandle = blockControlH.ref;

    for (int i = 0; i < numReactors; i++) {
        dwgHandle reactorH = buf->getHandle();
        DRW_DBG(" reactor Handle #");
        DRW_DBG(i);
        DRW_DBG(": ");
        DRW_DBGHL(reactorH.code, reactorH.size, reactorH.ref);
        DRW_DBG("\n");
    }
    if (xDictFlag != 1) {
        //R14+ //seems present in 2000
        dwgHandle XDicObjH = buf->getHandle();
        DRW_DBG(" XDicObj control Handle: ");
        DRW_DBGHL(XDicObjH.code, XDicObjH.size, XDicObjH.ref);
        DRW_DBG("\n");
    }
    if (version != DRW::AC1021) {
        //2007+ XDicObjH or NullH not present
    }
    dwgHandle NullH = buf->getHandle();
    DRW_DBG(" NullH control Handle: ");
    DRW_DBGHL(NullH.code, NullH.size, NullH.ref);
    DRW_DBG("\n");
    dwgHandle blockH = buf->getOffsetHandle(handle);
    DRW_DBG(" blockH Handle: ");
    DRW_DBGHL(blockH.code, blockH.size, blockH.ref);
    DRW_DBG("\n");
    block = blockH.ref;

    if (version > DRW::AC1015) {
        //2004+
        for (unsigned int i = 0; i < objectCount; i++) {
            dwgHandle entityH = buf->getHandle();
            DRW_DBG(" entityH Handle #");
            DRW_DBG(i);
            DRW_DBG(": ");
            DRW_DBGHL(entityH.code, entityH.size, entityH.ref);
            DRW_DBG("\n");
            entMap.push_back(entityH.ref);
        }
    }
    else {
        //2000-
        if (!blockIsXref && !xrefOverlaid) {
            dwgHandle firstH = buf->getHandle();
            DRW_DBG(" firstH entity Handle: ");
            DRW_DBGHL(firstH.code, firstH.size, firstH.ref);
            DRW_DBG("\n");
            firstEH = firstH.ref;
            dwgHandle lastH = buf->getHandle();
            DRW_DBG(" lastH entity Handle: ");
            DRW_DBGHL(lastH.code, lastH.size, lastH.ref);
            DRW_DBG("\n");
            lastEH = lastH.ref;
        }
    }
    DRW_DBG("Remaining bytes: ");
    DRW_DBG(buf->numRemainingBytes());
    DRW_DBG("\n");
    dwgHandle endBlockH = buf->getOffsetHandle(handle);
    DRW_DBG(" endBlockH Handle: ");
    DRW_DBGHL(endBlockH.code, endBlockH.size, endBlockH.ref);
    DRW_DBG("\n");
    endBlock = endBlockH.ref;

    if (version > DRW::AC1014) {
        //2000+
        for (unsigned int i = 0; i < insertCount; i++) {
            dwgHandle insertsH = buf->getHandle();
            DRW_DBG(" insertsH Handle #");
            DRW_DBG(i);
            DRW_DBG(": ");
            DRW_DBGHL(insertsH.code, insertsH.size, insertsH.ref);
            DRW_DBG("\n");
        }
        DRW_DBG("Remaining bytes: ");
        DRW_DBG(buf->numRemainingBytes());
        DRW_DBG("\n");
        dwgHandle layoutH = buf->getHandle();
        DRW_DBG(" layoutH Handle: ");
        DRW_DBGHL(layoutH.code, layoutH.size, layoutH.ref);
        DRW_DBG("\n");
    }
    DRW_DBG("Remaining bytes: ");
    DRW_DBG(buf->numRemainingBytes());
    DRW_DBG("\n\n");
    //    RS crc;   //RS */
    return buf->isGood();
}

//! Class to handle text style entries
/*!
*  Class to handle text style symbol table entries
*  @author Rallaz
*/
bool DRW_Textstyle::parseCode(int code, dxfReader* reader) {
    switch (code) {
        case 3:
            font = reader->getUtf8String();
            break;
        case 4:
            bigFont = reader->getUtf8String();
            break;
        case 40:
            height = reader->getDouble();
            break;
        case 41:
            width = reader->getDouble();
            break;
        case 50:
            oblique = reader->getDouble();
            break;
        case 42:
            lastHeight = reader->getDouble();
            break;
        case 71:
            genFlag = reader->getInt32();
            break;
        case 1071:
            fontFamily = reader->getInt32();
            break;
        default:
            return DRW_TableEntry::parseCode(code, reader);
    }

    return true;
}

bool DRW_Textstyle::parseDwg(DRW::Version version, dwgBuffer* buf, duint32 bs) {
    dwgBuffer sBuff = *buf;
    dwgBuffer* sBuf = buf;
    if (version > DRW::AC1018) {
        //2007+
        sBuf = &sBuff; //separate buffer for strings
    }
    bool ret = DRW_TableEntry::parseDwg(version, buf, sBuf, bs);
    DRW_DBG("\n***************************** parsing text style *********************************************\n");
    if (!ret)
        return ret;
    name = sBuf->getVariableText(version, false);
    DRW_DBG("text style name: ");
    DRW_DBG(name.c_str());
    DRW_DBG("\n");
    flags |= buf->getBit() << 6; //style are referenced for a entity, style code 70, bit 7 (64)
    /*dint16 xrefindex =*/
    buf->getBitShort();
    flags |= buf->getBit() << 4; //is refx dependent, style code 70, bit 5 (16)
    flags |= buf->getBit() << 2; //vertical text, stile code 70, bit 3 (4)
    flags |= buf->getBit(); //if is a shape file instead of text, style code 70, bit 1 (1)
    height = buf->getBitDouble();
    width = buf->getBitDouble();
    oblique = buf->getBitDouble();
    genFlag = buf->getRawChar8();
    lastHeight = buf->getBitDouble();
    font = sBuf->getVariableText(version, false);
    bigFont = sBuf->getVariableText(version, false);
    if (version > DRW::AC1018) {
        //2007+ skip string area
        buf->setPosition(objSize >> 3);
        buf->setBitPos(objSize & 7);
    }
    dwgHandle shpControlH = buf->getHandle();
    DRW_DBG(" parentControlH Handle: ");
    DRW_DBGHL(shpControlH.code, shpControlH.size, shpControlH.ref);
    DRW_DBG("\n");
    parentHandle = shpControlH.ref;
    DRW_DBG("Remaining bytes: ");
    DRW_DBG(buf->numRemainingBytes());
    DRW_DBG("\n");
    if (xDictFlag != 1) {
        //linetype in 2004 seems not have XDicObjH or NULL handle
        dwgHandle XDicObjH = buf->getHandle();
        DRW_DBG(" XDicObj control Handle: ");
        DRW_DBGHL(XDicObjH.code, XDicObjH.size, XDicObjH.ref);
        DRW_DBG("\n");
        DRW_DBG("Remaining bytes: ");
        DRW_DBG(buf->numRemainingBytes());
        DRW_DBG("\n");
    }
    /*RLZ: fails verify this part*/
    dwgHandle XRefH = buf->getHandle();
    DRW_DBG(" XRefH control Handle: ");
    DRW_DBGHL(XRefH.code, XRefH.size, XRefH.ref);
    DRW_DBG("\n");

    DRW_DBG("Remaining bytes: ");
    DRW_DBG(buf->numRemainingBytes());
    DRW_DBG("\n\n");
    //    RS crc;   //RS */
    return buf->isGood();
}

//! Class to handle vport entries
/*!
*  Class to handle vport symbol table entries
*  @author Rallaz
*/
bool DRW_Vport::parseCode(int code, dxfReader* reader) {
    switch (code) {
        case 10:
            lowerLeft.x = reader->getDouble();
            break;
        case 20:
            lowerLeft.y = reader->getDouble();
            break;
        case 11:
            UpperRight.x = reader->getDouble();
            break;
        case 21:
            UpperRight.y = reader->getDouble();
            break;
        case 12:
            center.x = reader->getDouble();
            break;
        case 22:
            center.y = reader->getDouble();
            break;
        case 13:
            snapBase.x = reader->getDouble();
            break;
        case 23:
            snapBase.y = reader->getDouble();
            break;
        case 14:
            snapSpacing.x = reader->getDouble();
            break;
        case 24:
            snapSpacing.y = reader->getDouble();
            break;
        case 15:
            gridSpacing.x = reader->getDouble();
            break;
        case 25:
            gridSpacing.y = reader->getDouble();
            break;
        case 16:
            viewDir.x = reader->getDouble();
            break;
        case 26:
            viewDir.y = reader->getDouble();
            break;
        case 36:
            viewDir.z = reader->getDouble();
            break;
        case 17:
            viewTarget.x = reader->getDouble();
            break;
        case 27:
            viewTarget.y = reader->getDouble();
            break;
        case 37:
            viewTarget.z = reader->getDouble();
            break;
        case 40:
            height = reader->getDouble();
            break;
        case 41:
            ratio = reader->getDouble();
            break;
        case 42:
            lensHeight = reader->getDouble();
            break;
        case 43:
            frontClip = reader->getDouble();
            break;
        case 44:
            backClip = reader->getDouble();
            break;
        case 50:
            snapAngle = reader->getDouble();
            break;
        case 51:
            twistAngle = reader->getDouble();
            break;
        case 71:
            viewMode = reader->getInt32();
            break;
        case 72:
            circleZoom = reader->getInt32();
            break;
        case 73:
            fastZoom = reader->getInt32();
            break;
        case 74:
            ucsIcon = reader->getInt32();
            break;
        case 75:
            snap = reader->getInt32();
            break;
        case 76:
            grid = reader->getInt32();
            break;
        case 77:
            snapStyle = reader->getInt32();
            break;
        case 78:
            snapIsopair = reader->getInt32();
            break;
        default:
            return DRW_TableEntry::parseCode(code, reader);
    }

    return true;
}

bool DRW_Vport::parseDwg(DRW::Version version, dwgBuffer* buf, duint32 bs) {
    dwgBuffer sBuff = *buf;
    dwgBuffer* sBuf = buf;
    if (version > DRW::AC1018) {
        //2007+
        sBuf = &sBuff; //separate buffer for strings
    }
    bool ret = DRW_TableEntry::parseDwg(version, buf, sBuf, bs);
    DRW_DBG("\n***************************** parsing VPort ************************************************\n");
    if (!ret)
        return ret;
    name = sBuf->getVariableText(version, false);
    DRW_DBG("vport name: ");
    DRW_DBG(name.c_str());
    DRW_DBG("\n");
    flags |= buf->getBit() << 6; // code 70, bit 7 (64)
    if (version < DRW::AC1021) {
        //2004-
        /*dint16 xrefindex =*/
        buf->getBitShort();
    }
    flags |= buf->getBit() << 4; //is refx dependent, style code 70, bit 5 (16)
    height = buf->getBitDouble();
    ratio = buf->getBitDouble();
    DRW_DBG("flags: ");
    DRW_DBG(flags);
    DRW_DBG(" height: ");
    DRW_DBG(height);
    DRW_DBG(" ratio: ");
    DRW_DBG(ratio);
    center = buf->get2RawDouble();
    DRW_DBG("\nview center: ");
    DRW_DBGPT(center.x, center.y, center.z);
    viewTarget.x = buf->getBitDouble();
    viewTarget.y = buf->getBitDouble();
    viewTarget.z = buf->getBitDouble();
    DRW_DBG("\nview target: ");
    DRW_DBGPT(viewTarget.x, viewTarget.y, viewTarget.z);
    viewDir.x = buf->getBitDouble();
    viewDir.y = buf->getBitDouble();
    viewDir.z = buf->getBitDouble();
    DRW_DBG("\nview dir: ");
    DRW_DBGPT(viewDir.x, viewDir.y, viewDir.z);
    twistAngle = buf->getBitDouble();
    lensHeight = buf->getBitDouble();
    frontClip = buf->getBitDouble();
    backClip = buf->getBitDouble();
    DRW_DBG("\ntwistAngle: ");
    DRW_DBG(twistAngle);
    DRW_DBG(" lensHeight: ");
    DRW_DBG(lensHeight);
    DRW_DBG(" frontClip: ");
    DRW_DBG(frontClip);
    DRW_DBG(" backClip: ");
    DRW_DBG(backClip);
    viewMode = buf->getBit(); //view mode, code 71, bit 0 (1)
    viewMode |= buf->getBit() << 1; //view mode, code 71, bit 1 (2)
    viewMode |= buf->getBit() << 2; //view mode, code 71, bit 2 (4)
    viewMode |= buf->getBit() << 4; //view mode, code 71, bit 4 (16)
    if (version > DRW::AC1014) {
        //2000+
        //duint8 renderMode = buf->getRawChar8();
        DRW_DBG("\n renderMode: ");
        DRW_DBG(buf->getRawChar8());
        if (version > DRW::AC1018) {
            //2007+
            DRW_DBG("\n use default lights: ");
            DRW_DBG(buf->getBit());
            DRW_DBG(" default lighting type: ");
            DRW_DBG(buf->getRawChar8());
            DRW_DBG(" brightness: ");
            DRW_DBG(buf->getBitDouble());
            DRW_DBG("\n contrast: ");
            DRW_DBG(buf->getBitDouble());
            DRW_DBG("\n");
            DRW_DBG(" ambient color CMC: ");
            DRW_DBG(buf->getCmColor(version));
        }
    }
    lowerLeft = buf->get2RawDouble();
    DRW_DBG("\nlowerLeft: ");
    DRW_DBGPT(lowerLeft.x, lowerLeft.y, lowerLeft.z);
    UpperRight = buf->get2RawDouble();
    DRW_DBG("\nUpperRight: ");
    DRW_DBGPT(UpperRight.x, UpperRight.y, UpperRight.z);
    viewMode |= buf->getBit() << 3; //UCSFOLLOW, view mode, code 71, bit 3 (8)
    circleZoom = buf->getBitShort();
    fastZoom = buf->getBit();
    DRW_DBG("\nviewMode: ");
    DRW_DBG(viewMode);
    DRW_DBG(" circleZoom: ");
    DRW_DBG(circleZoom);
    DRW_DBG(" fastZoom: ");
    DRW_DBG(fastZoom);
    ucsIcon = buf->getBit(); //ucs Icon, code 74, bit 0 (1)
    ucsIcon |= buf->getBit() << 1; //ucs Icon, code 74, bit 1 (2)
    grid = buf->getBit();
    DRW_DBG("\nucsIcon: ");
    DRW_DBG(ucsIcon);
    DRW_DBG(" grid: ");
    DRW_DBG(grid);
    gridSpacing = buf->get2RawDouble();
    DRW_DBG("\ngrid Spacing: ");
    DRW_DBGPT(gridSpacing.x, gridSpacing.y, gridSpacing.z);
    snap = buf->getBit();
    snapStyle = buf->getBit();
    DRW_DBG("\nsnap on/off: ");
    DRW_DBG(snap);
    DRW_DBG(" snap Style: ");
    DRW_DBG(snapStyle);
    snapIsopair = buf->getBitShort();
    snapAngle = buf->getBitDouble();
    DRW_DBG("\nsnap Isopair: ");
    DRW_DBG(snapIsopair);
    DRW_DBG(" snap Angle: ");
    DRW_DBG(snapAngle);
    snapBase = buf->get2RawDouble();
    DRW_DBG("\nsnap Base: ");
    DRW_DBGPT(snapBase.x, snapBase.y, snapBase.z);
    snapSpacing = buf->get2RawDouble();
    DRW_DBG("\nsnap Spacing: ");
    DRW_DBGPT(snapSpacing.x, snapSpacing.y, snapSpacing.z);
    if (version > DRW::AC1014) {
        //2000+
        DRW_DBG("\n Unknown: ");
        DRW_DBG(buf->getBit());
        DRW_DBG(" UCS per Viewport: ");
        DRW_DBG(buf->getBit());
        DRW_DBG("\nUCS origin: ");
        DRW_DBGPT(buf->getBitDouble(), buf->getBitDouble(), buf->getBitDouble());
        DRW_DBG("\nUCS X Axis: ");
        DRW_DBGPT(buf->getBitDouble(), buf->getBitDouble(), buf->getBitDouble());
        DRW_DBG("\nUCS Y Axis: ");
        DRW_DBGPT(buf->getBitDouble(), buf->getBitDouble(), buf->getBitDouble());
        DRW_DBG("\nUCS elevation: ");
        DRW_DBG(buf->getBitDouble());
        DRW_DBG(" UCS Orthographic type: ");
        DRW_DBG(buf->getBitShort());
        if (version > DRW::AC1018) {
            //2007+
            gridBehavior = buf->getBitShort();
            DRW_DBG(" gridBehavior (flags): ");
            DRW_DBG(gridBehavior);
            DRW_DBG(" Grid major: ");
            DRW_DBG(buf->getBitShort());
        }
    }

    //common handles
    if (version > DRW::AC1018) {
        //2007+ skip string area
        buf->setPosition(objSize >> 3);
        buf->setBitPos(objSize & 7);
    }
    dwgHandle vpControlH = buf->getHandle();
    DRW_DBG("\n parentControlH Handle: ");
    DRW_DBGHL(vpControlH.code, vpControlH.size, vpControlH.ref);
    DRW_DBG("\n");
    parentHandle = vpControlH.ref;
    DRW_DBG("Remaining bytes: ");
    DRW_DBG(buf->numRemainingBytes());
    DRW_DBG("\n");
    if (xDictFlag != 1) {
        dwgHandle XDicObjH = buf->getHandle();
        DRW_DBG(" XDicObj control Handle: ");
        DRW_DBGHL(XDicObjH.code, XDicObjH.size, XDicObjH.ref);
        DRW_DBG("\n");
        DRW_DBG("Remaining bytes: ");
        DRW_DBG(buf->numRemainingBytes());
        DRW_DBG("\n");
    }
    /*RLZ: fails verify this part*/
    dwgHandle XRefH = buf->getHandle();
    DRW_DBG(" XRefH control Handle: ");
    DRW_DBGHL(XRefH.code, XRefH.size, XRefH.ref);

    if (version > DRW::AC1014) {
        //2000+
        DRW_DBG("\nRemaining bytes: ");
        DRW_DBG(buf->numRemainingBytes());
        if (version > DRW::AC1018) {
            //2007+
            dwgHandle bkgrdH = buf->getHandle();
            DRW_DBG(" background Handle: ");
            DRW_DBGHL(bkgrdH.code, bkgrdH.size, bkgrdH.ref);
            DRW_DBG("\nRemaining bytes: ");
            DRW_DBG(buf->numRemainingBytes());
            dwgHandle visualStH = buf->getHandle();
            DRW_DBG(" visual style Handle: ");
            DRW_DBGHL(visualStH.code, visualStH.size, visualStH.ref);
            DRW_DBG("\nRemaining bytes: ");
            DRW_DBG(buf->numRemainingBytes());
            dwgHandle sunH = buf->getHandle();
            DRW_DBG(" sun Handle: ");
            DRW_DBGHL(sunH.code, sunH.size, sunH.ref);
            DRW_DBG("\nRemaining bytes: ");
            DRW_DBG(buf->numRemainingBytes());
        }
        dwgHandle namedUCSH = buf->getHandle();
        DRW_DBG(" named UCS Handle: ");
        DRW_DBGHL(namedUCSH.code, namedUCSH.size, namedUCSH.ref);
        DRW_DBG("\nRemaining bytes: ");
        DRW_DBG(buf->numRemainingBytes());
        dwgHandle baseUCSH = buf->getHandle();
        DRW_DBG(" base UCS Handle: ");
        DRW_DBGHL(baseUCSH.code, baseUCSH.size, baseUCSH.ref);
    }

    DRW_DBG("\n Remaining bytes: ");
    DRW_DBG(buf->numRemainingBytes());
    DRW_DBG("\n");
    //    RS crc;   //RS */
    return buf->isGood();
}

bool DRW_ImageDef::parseCode(int code, dxfReader* reader) {
    switch (code) {
        case 1:
            name = reader->getUtf8String();
            break;
        case 5:
            handle = reader->getHandleId();
            break;
        case 10:
            u = reader->getDouble();
            break;
        case 20:
            v = reader->getDouble();
            break;
        case 11:
            up = reader->getDouble();
            break;
        case 12:
            vp = reader->getDouble();
            break;
        case 21:
            vp = reader->getDouble();
            break;
        case 280:
            loaded = reader->getInt32();
            break;
        case 281:
            resolution = reader->getInt32();
            break;
        default:
            return DRW_TableEntry::parseCode(code, reader);
    }

    return true;
}

bool DRW_ImageDef::parseDwg(DRW::Version version, dwgBuffer* buf, duint32 bs) {
    dwgBuffer sBuff = *buf;
    dwgBuffer* sBuf = buf;
    if (version > DRW::AC1018) {
        //2007+
        sBuf = &sBuff; //separate buffer for strings
    }
    bool ret = DRW_TableEntry::parseDwg(version, buf, sBuf, bs);
    DRW_DBG("\n***************************** parsing Image Def *********************************************\n");
    if (!ret)
        return ret;
    dint32 imgVersion = buf->getBitLong();
    DRW_DBG("class Version: ");
    DRW_DBG(imgVersion);
    DRW_Coord size = buf->get2RawDouble();
    DRW_UNUSED(size); //RLZ: temporary, complete API
    name = sBuf->getVariableText(version, false);
    DRW_DBG("appId name: ");
    DRW_DBG(name.c_str());
    DRW_DBG("\n");
    loaded = buf->getBit();
    resolution = buf->getRawChar8();
    up = buf->getRawDouble();
    vp = buf->getRawDouble();

    dwgHandle parentH = buf->getHandle();
    DRW_DBG(" parentH Handle: ");
    DRW_DBGHL(parentH.code, parentH.size, parentH.ref);
    DRW_DBG("\n");
    parentHandle = parentH.ref;
    DRW_DBG("Remaining bytes: ");
    DRW_DBG(buf->numRemainingBytes());
    DRW_DBG("\n");
    //RLZ: Reactors handles
    if (xDictFlag != 1) {
        dwgHandle XDicObjH = buf->getHandle();
        DRW_DBG(" XDicObj control Handle: ");
        DRW_DBGHL(XDicObjH.code, XDicObjH.size, XDicObjH.ref);
        DRW_DBG("\n");
        DRW_DBG("Remaining bytes: ");
        DRW_DBG(buf->numRemainingBytes());
        DRW_DBG("\n");
    }
    /*RLZ: fails verify this part*/
    dwgHandle XRefH = buf->getHandle();
    DRW_DBG(" XRefH control Handle: ");
    DRW_DBGHL(XRefH.code, XRefH.size, XRefH.ref);
    DRW_DBG("\n");

    DRW_DBG("Remaining bytes: ");
    DRW_DBG(buf->numRemainingBytes());
    DRW_DBG("\n\n");
    //    RS crc;   //RS */
    return buf->isGood();
}

bool DRW_PlotSettings::parseCode(int code, dxfReader* reader) {
    switch (code) {
        case 5:
            handle = reader->getHandleId();
            break;
        case 6:
            plotViewName = reader->getUtf8String();
            break;
        case 40:
            marginLeft = reader->getDouble();
            break;
        case 41:
            marginBottom = reader->getDouble();
            break;
        case 42:
            marginRight = reader->getDouble();
            break;
        case 43:
            marginTop = reader->getDouble();
            break;
        default:
            return DRW_TableEntry::parseCode(code, reader);
    }

    return true;
}

bool DRW_PlotSettings::parseDwg(DRW::Version version, dwgBuffer* buf, duint32 bs) {
    (void)version;
    (void)bs;
    DRW_DBG("\n********************** parsing Plot Settings not yet implemented **************************\n");
    return buf->isGood();
}

bool DRW_AppId::parseDwg(DRW::Version version, dwgBuffer* buf, duint32 bs) {
    dwgBuffer sBuff = *buf;
    dwgBuffer* sBuf = buf;
    if (version > DRW::AC1018) {
        //2007+
        sBuf = &sBuff; //separate buffer for strings
    }
    bool ret = DRW_TableEntry::parseDwg(version, buf, sBuf, bs);
    DRW_DBG("\n***************************** parsing app Id *********************************************\n");
    if (!ret)
        return ret;
    name = sBuf->getVariableText(version, false);
    DRW_DBG("appId name: ");
    DRW_DBG(name);
    DRW_DBG("\n");
    flags |= buf->getBit() << 6; // code 70, bit 7 (64)
    /*dint16 xrefindex =*/
    buf->getBitShort();
    flags |= buf->getBit() << 4; //is refx dependent, style code 70, bit 5 (16)
    duint8 unknown = buf->getRawChar8(); // unknown code 71
    DRW_DBG("unknown code 71: ");
    DRW_DBG(unknown);
    DRW_DBG("\n");
    if (version > DRW::AC1018) {
        //2007+ skip string area
        buf->setPosition(objSize >> 3);
        buf->setBitPos(objSize & 7);
    }
    dwgHandle appIdControlH = buf->getHandle();
    DRW_DBG(" parentControlH Handle: ");
    DRW_DBGHL(appIdControlH.code, appIdControlH.size, appIdControlH.ref);
    DRW_DBG("\n");
    parentHandle = appIdControlH.ref;
    DRW_DBG("Remaining bytes: ");
    DRW_DBG(buf->numRemainingBytes());
    DRW_DBG("\n");
    if (xDictFlag != 1) {
        //linetype in 2004 seems not have XDicObjH or NULL handle
        dwgHandle XDicObjH = buf->getHandle();
        DRW_DBG(" XDicObj control Handle: ");
        DRW_DBGHL(XDicObjH.code, XDicObjH.size, XDicObjH.ref);
        DRW_DBG("\n");
        DRW_DBG("Remaining bytes: ");
        DRW_DBG(buf->numRemainingBytes());
        DRW_DBG("\n");
    }
    /*RLZ: fails verify this part*/
    dwgHandle XRefH = buf->getHandle();
    DRW_DBG(" XRefH control Handle: ");
    DRW_DBGHL(XRefH.code, XRefH.size, XRefH.ref);
    DRW_DBG("\n");

    DRW_DBG("Remaining bytes: ");
    DRW_DBG(buf->numRemainingBytes());
    DRW_DBG("\n\n");
    //    RS crc;   //RS */
    return buf->isGood();
}

bool DRW_UCS::parseDwg([[maybe_unused]] DRW::Version version, dwgBuffer* buf, [[maybe_unused]] duint32 bs) {
    // fixme - sand - complete reading UCS from DWG
    DRW_DBG(
        "\n********************** parsing UCS Settings from DWG is not yet implemented **************************\n");
    return buf->isGood();
}

bool DRW_UCS::parseCode(int code, dxfReader* reader) {
    switch (code) {
        case 10: {
            origin.x = reader->getDouble();
            break;
        }
        case 20: {
            origin.y = reader->getDouble();
            break;
        }
        case 30: {
            origin.z = reader->getDouble();
            break;
        }
        case 11: {
            xAxisDirection.x = reader->getDouble();
            break;
        }
        case 21: {
            xAxisDirection.y = reader->getDouble();
            break;
        }
        case 31: {
            xAxisDirection.z = reader->getDouble();
            break;
        }
        case 12: {
            yAxisDirection.x = reader->getDouble();
            break;
        }
        case 22: {
            yAxisDirection.y = reader->getDouble();
            break;
        }
        case 32: {
            yAxisDirection.z = reader->getDouble();
            break;
        }
        case 79: {
            // always 0
            break;
        }
        case 146: {
            elevation = reader->getDouble();
            break;
        }
        case 346: {
            // ID/handle of base UCS if this is an orthographic. This code is not present if the 79 code is 0.
            // If this code is not present and 79 code is non-zero, then base UCS is assumed to be WORLD
            break;
        }
        case 71: {
            //            Orthographic type (optional; always appears in pairs with the 13, 23, 33 codes):
            //            1 = Top; 2 = Bottom
            //            3 = Front; 4 = Back
            //            5 = Left; 6 = Right
            orthoType = reader->getInt32();
            break;
        }
        case 13: {
            orthoOrigin.x = reader->getDouble();
            break;
        }
        case 23: {
            orthoOrigin.y = reader->getDouble();
            break;
        }
        case 33: {
            orthoOrigin.z = reader->getDouble();
            break;
        }
        default:
            return DRW_TableEntry::parseCode(code, reader);
    }
    return true;
}

bool DRW_View::parseCode(int code, dxfReader* reader) {
    switch (code) {
        case 40: {
            size.y = reader->getDouble();
            break;
        }
        case 41: {
            size.x = reader->getDouble();
            break;
        }
        case 10: {
            center.x = reader->getDouble();
            break;
        }
        case 20: {
            center.y = reader->getDouble();
            break;
        }
        case 11: {
            viewDirectionFromTarget.x = reader->getDouble();
            break;
        }
        case 21: {
            viewDirectionFromTarget.y = reader->getDouble();
            break;
        }
        case 31: {
            viewDirectionFromTarget.z = reader->getDouble();
            break;
        }
        case 12: {
            targetPoint.x = reader->getDouble();
            break;
        }
        case 22: {
            targetPoint.y = reader->getDouble();
            break;
        }
        case 32: {
            targetPoint.z = reader->getDouble();
            break;
        }
        case 42: {
            lensLen = reader->getDouble();
            break;
        }
        case 43: {
            frontClippingPlaneOffset = reader->getDouble();
            break;
        }
        case 44: {
            backClippingPlaneOffset = reader->getDouble();
            break;
        }
        case 50: {
            twistAngle = reader->getDouble();
            break;
        }
        case 71: {
            viewMode = reader->getInt32(); // tmp - check size to read
            break;
        }
        case 281: {
            renderMode = reader->getInt32(); // tmp - check size to read
            break;
        }
        case 72: {
            hasUCS = reader->getBool();
            break;
        }
        case 73: {
            cameraPlottable = reader->getBool();
            break;
        }
        case 110: {
            ucsOrigin.x = reader->getDouble();
            break;
        }
        case 120: {
            ucsOrigin.y = reader->getDouble();
            break;
        }
        case 130: {
            ucsOrigin.z = reader->getDouble();
            break;
        }
        case 111: {
            ucsXAxis.x = reader->getDouble();
            break;
        }
        case 121: {
            ucsXAxis.y = reader->getDouble();
            break;
        }
        case 131: {
            ucsXAxis.z = reader->getDouble();
            break;
        }
        case 112: {
            ucsYAxis.x = reader->getDouble();
            break;
        }
        case 122: {
            ucsYAxis.y = reader->getDouble();
            break;
        }
        case 132: {
            ucsYAxis.z = reader->getDouble();
            break;
        }
        case 79: {
            ucsOrthoType = reader->getInt32();
            break;
        }
        case 146: {
            ucsElevation = reader->getDouble();
            break;
        }
        case 345: {
            namedUCS_ID = reader->getHandleId();
            // ID/handle of AcDbUCSTableRecord if UCS is a named UCS. If not present, then UCS is unnamed, code 345
            break;
        }
        case 346: {
            baseUCS_ID = reader->getHandleId();
            // ID/handle of AcDbUCSTableRecord of base UCS if UCS is orthographic, If not present and 79 code is non-zero, then base UCS is taken to be WORLD, code 346
            break;
        }
        default:
            return DRW_TableEntry::parseCode(code, reader);
    }
    return true;
}

bool DRW_View::parseDwg(DRW::Version /*version*/, dwgBuffer* buf, duint32 /*bs*/) {
    // fixme - sand - complete reading VIEW from DWG
    DRW_DBG(
        "\n********************** parsing VIEW Settings from DWG is not yet implemented **************************\n");
    return buf->isGood();
}

DRW_ParsingContext::~DRW_ParsingContext() {
    for (auto it=lineTypeMap.begin(); it!=lineTypeMap.end(); ++it) {
        delete it->second;
    }

    for (auto it=blockRecordMap.begin(); it!=blockRecordMap.end(); ++it) {
        delete it->second;
    }

    for (auto it=textStyles.begin(); it!=textStyles.end(); ++it) {
        delete it->second;
    }

    blockRecordMap.clear();
    lineTypeMap.clear();
    textStyles.clear();
}

std::string DRW_ParsingContext::resolveBlockRecordName(int handle) {
    auto it = blockRecordMap.find(handle);
    if (it != blockRecordMap.end()) {
        DRW_Block_Record* blockRecord = it->second;
        std::string name = blockRecord->name;
        return name;
    }
    return {};
}

std::string DRW_ParsingContext::resolveLineTypeName(int handle) {
    auto it = lineTypeMap.find(handle);
    if (it != lineTypeMap.end()) {
        DRW_LType* lineType = it->second;
        std::string name = lineType->name;
        return name;
    }
    return {};
}

std::string DRW_ParsingContext::resolveTextStyleName(int handle) {
    auto it = textStyles.find(handle);
    if (it != textStyles.end()) {
        DRW_Textstyle* textStyle = it->second;
        std::string name = textStyle->name;
        return name;
    }
    return {};
}

DRW_WritingContext::~DRW_WritingContext() {
    textStyleMap.clear();
    blockMap.clear();
    lineTypesMap.clear();
}