/******************************************************************************
 *
 * Project:  SXF Translator
 * Purpose:  Definition of classes for OGR SXF Layers.
 * Author:   Ben Ahmed Daho Ali, bidandou(at)yahoo(dot)fr
 *           Dmitry Baryshnikov, polimax@mail.ru
 *           Alexandr Lisovenko, alexander.lisovenko@gmail.com
 *
 ******************************************************************************
 * Copyright (c) 2011, Ben Ahmed Daho Ali
 * Copyright (c) 2013, NextGIS
 * Copyright (c) 2014, Even Rouault <even dot rouault at mines-paris dot org>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 ****************************************************************************/

#include "ogr_sxf.h"
#include "cpl_conv.h"
#include "cpl_string.h"
#include "ogr_p.h"
#include "ogr_srs_api.h"
#include "cpl_multiproc.h"

CPL_CVSID("$Id: ogrsxflayer.cpp dd78be7491f410ef103c05b37100754430c60420 2018-01-03 09:09:16Z Even Rouault $")

/************************************************************************/
/*                        OGRSXFLayer()                                 */
/************************************************************************/

OGRSXFLayer::OGRSXFLayer(
    VSILFILE* fp, CPLMutex** hIOMutex, GByte nID, const char* pszLayerName,
    int nVer, const SXFMapDescription&  sxfMapDesc) :
    OGRLayer(),
    poFeatureDefn(new OGRFeatureDefn(pszLayerName)),
    fpSXF(fp),
    nLayerID(nID),
    stSXFMapDescription(sxfMapDesc),
    m_nSXFFormatVer(nVer),
    sFIDColumn_("ogc_fid"),
    m_hIOMutex(hIOMutex),
    m_dfCoeff(sxfMapDesc.dfScale / sxfMapDesc.nResolution)
{
    stSXFMapDescription.pSpatRef->Reference();
    oNextIt = mnRecordDesc.begin();
    SetDescription( poFeatureDefn->GetName() );
    poFeatureDefn->Reference();

    poFeatureDefn->SetGeomType(wkbUnknown);
    if (poFeatureDefn->GetGeomFieldCount() != 0)
        poFeatureDefn->GetGeomFieldDefn(0)->
            SetSpatialRef(stSXFMapDescription.pSpatRef);

    OGRFieldDefn oFIDField(sFIDColumn_, OFTInteger);
    poFeatureDefn->AddFieldDefn(&oFIDField);

    OGRFieldDefn oClCodeField( "CLCODE", OFTInteger );
    oClCodeField.SetWidth(10);
    poFeatureDefn->AddFieldDefn( &oClCodeField );

    OGRFieldDefn oClNameField( "CLNAME", OFTString );
    oClNameField.SetWidth(32);
    poFeatureDefn->AddFieldDefn( &oClNameField );

    OGRFieldDefn oNumField( "OBJECTNUMB", OFTInteger );
    oNumField.SetWidth(10);
    poFeatureDefn->AddFieldDefn( &oNumField );

    OGRFieldDefn oAngField("ANGLE", OFTReal);
    poFeatureDefn->AddFieldDefn(&oAngField);

    OGRFieldDefn  oTextField( "TEXT", OFTString );
    oTextField.SetWidth(255);
    poFeatureDefn->AddFieldDefn( &oTextField );
}

/************************************************************************/
/*                         ~OGRSXFLayer()                               */
/************************************************************************/

OGRSXFLayer::~OGRSXFLayer()
{
    stSXFMapDescription.pSpatRef->Release();
    poFeatureDefn->Release();
}

/************************************************************************/
/*                AddClassifyCode(unsigned nClassCode)                  */
/* Add layer supported classify codes. Only records with this code can  */
/* be in layer                                                          */
/************************************************************************/

void OGRSXFLayer::AddClassifyCode(unsigned nClassCode, const char *szName)
{
    if (szName != nullptr)
    {
        mnClassificators[nClassCode] = CPLString(szName);
    }
    else
    {
        CPLString szIdName;
        szIdName.Printf("%d", nClassCode);
        mnClassificators[nClassCode] = szIdName;
    }
}

/************************************************************************/
/*                           AddRecord()                                */
/************************************************************************/

bool OGRSXFLayer::AddRecord( long nFID, unsigned nClassCode, vsi_l_offset nOffset,
                             bool bHasSemantic, size_t nSemanticsSize )
{
    if( mnClassificators.find(nClassCode) != mnClassificators.end() ||
        EQUAL(GetName(), "Not_Classified") )
    {
        mnRecordDesc[nFID] = nOffset;
        // Add additional semantics (attribute fields).
        if (bHasSemantic)
        {
            size_t offset = 0;

            while (offset < nSemanticsSize)
            {
                SXFRecordAttributeInfo stAttrInfo;
                bool bAddField = false;
                size_t nCurrOff = 0;
                int nReadObj = static_cast<int>(VSIFReadL(&stAttrInfo, 4, 1, fpSXF));
                if (nReadObj == 1)
                {
                    CPLString oFieldName;
                    if (snAttributeCodes.find(stAttrInfo.nCode) == snAttributeCodes.end())
                    {
                        bAddField = true;
                        snAttributeCodes.insert(stAttrInfo.nCode);
                        oFieldName.Printf("SC_%d", stAttrInfo.nCode);
                    }

                    SXFRecordAttributeType eType = (SXFRecordAttributeType)stAttrInfo.nType;

                    offset += 4;

                    switch (eType) //TODO: set field type form RSC as here sometimes we have the codes and string values can be get from RSC by this code
                    {
                    case SXF_RAT_ASCIIZ_DOS:
                    {
                        if (bAddField)
                        {
                            OGRFieldDefn  oField(oFieldName, OFTString);
                            oField.SetWidth(255);
                            poFeatureDefn->AddFieldDefn(&oField);
                        }
                        offset += stAttrInfo.nScale + 1;
                        nCurrOff = stAttrInfo.nScale + 1;
                        break;
                    }
                    case SXF_RAT_ONEBYTE:
                    {
                        if (bAddField)
                        {
                            OGRFieldDefn  oField(oFieldName, OFTReal);
                            poFeatureDefn->AddFieldDefn(&oField);
                        }
                        offset += 1;
                        nCurrOff = 1;
                        break;
                    }
                    case SXF_RAT_TWOBYTE:
                    {
                        if (bAddField)
                        {
                            OGRFieldDefn  oField(oFieldName, OFTReal);
                            poFeatureDefn->AddFieldDefn(&oField);
                        }
                        offset += 2;
                        nCurrOff = 2;
                        break;
                    }
                    case SXF_RAT_FOURBYTE:
                    {
                        if (bAddField)
                        {
                            OGRFieldDefn  oField(oFieldName, OFTReal);
                            poFeatureDefn->AddFieldDefn(&oField);
                        }
                        offset += 4;
                        nCurrOff = 4;
                        break;
                    }
                    case SXF_RAT_EIGHTBYTE:
                    {
                        if (bAddField)
                        {
                            OGRFieldDefn  oField(oFieldName, OFTReal);
                            poFeatureDefn->AddFieldDefn(&oField);
                        }
                        offset += 8;
                        nCurrOff = 8;
                        break;
                    }
                    case SXF_RAT_ANSI_WIN:
                    {
                        if (bAddField)
                        {
                            OGRFieldDefn  oField(oFieldName, OFTString);
                            oField.SetWidth(255);
                            poFeatureDefn->AddFieldDefn(&oField);
                        }
                        unsigned nLen = unsigned(stAttrInfo.nScale) + 1;
                        offset += nLen;
                        nCurrOff = nLen;
                        break;
                    }
                    case SXF_RAT_UNICODE:
                    {
                        if (bAddField)
                        {
                            OGRFieldDefn  oField(oFieldName, OFTString);
                            oField.SetWidth(255);
                            poFeatureDefn->AddFieldDefn(&oField);
                        }
                        unsigned nLen = (unsigned(stAttrInfo.nScale) + 1) * 2;
                        offset += nLen;
                        nCurrOff = nLen;
                        break;
                    }
                    case SXF_RAT_BIGTEXT:
                    {
                        if (bAddField)
                        {
                            OGRFieldDefn  oField(oFieldName, OFTString);
                            oField.SetWidth(1024);
                            poFeatureDefn->AddFieldDefn(&oField);
                        }
                        GUInt32 scale2 = 0;
                        VSIFReadL(&scale2, sizeof(GUInt32), 1, fpSXF);
                        CPL_LSBPTR32(&scale2);

                        offset += scale2;
                        nCurrOff = scale2;
                        break;
                    }
                    default:
                        break;
                    }
                }
                if( nCurrOff == 0 )
                    break;
                VSIFSeekL(fpSXF, nCurrOff, SEEK_CUR);
            }
        }
        return true;
    }

    return false;
}

/************************************************************************/
/*                           SetNextByIndex()                           */
/************************************************************************/

OGRErr OGRSXFLayer::SetNextByIndex(GIntBig nIndex)
{
    if (nIndex < 0 || nIndex > (long)mnRecordDesc.size())
        return OGRERR_FAILURE;

    oNextIt = mnRecordDesc.begin();
    std::advance(oNextIt, static_cast<size_t>(nIndex));

    return OGRERR_NONE;
}

/************************************************************************/
/*                             GetFeature()                             */
/************************************************************************/

OGRFeature *OGRSXFLayer::GetFeature(GIntBig nFID)
{
    const auto IT = mnRecordDesc.find(static_cast<long>(nFID));
    if (IT != mnRecordDesc.end())
    {
        VSIFSeekL(fpSXF, IT->second, SEEK_SET);
        OGRFeature *poFeature = GetNextRawFeature(IT->first);
        if (poFeature != nullptr && poFeature->GetGeometryRef() != nullptr && GetSpatialRef() != nullptr)
        {
            poFeature->GetGeometryRef()->assignSpatialReference(GetSpatialRef());
        }
        return poFeature;
    }

    return nullptr;
}

/************************************************************************/
/*                           GetSpatialRef()                            */
/************************************************************************/

OGRSpatialReference *OGRSXFLayer::GetSpatialRef()
{
    return stSXFMapDescription.pSpatRef;
}

/************************************************************************/
/*                             GetExtent()                              */
/************************************************************************/

OGRErr OGRSXFLayer::GetExtent(OGREnvelope *psExtent, int bForce)
{
    if (bForce)
    {
        return OGRLayer::GetExtent(psExtent, bForce);
    }
    else
    {
        psExtent->MinX = stSXFMapDescription.Env.MinX;
        psExtent->MaxX = stSXFMapDescription.Env.MaxX;
        psExtent->MinY = stSXFMapDescription.Env.MinY;
        psExtent->MaxY = stSXFMapDescription.Env.MaxY;

        return OGRERR_NONE;
    }
}

/************************************************************************/
/*                          GetFeatureCount()                           */
/************************************************************************/

GIntBig OGRSXFLayer::GetFeatureCount(int bForce)
{
    if (m_poFilterGeom == nullptr && m_poAttrQuery == nullptr)
        return static_cast<int>(mnRecordDesc.size());
    else
        return OGRLayer::GetFeatureCount(bForce);
}

/************************************************************************/
/*                            ResetReading()                            */
/************************************************************************/

void OGRSXFLayer::ResetReading()

{
    oNextIt = mnRecordDesc.begin();
}

/************************************************************************/
/*                           GetNextFeature()                           */
/************************************************************************/

OGRFeature *OGRSXFLayer::GetNextFeature()
{
    CPLMutexHolderD(m_hIOMutex);
    while (oNextIt != mnRecordDesc.end())
    {
        VSIFSeekL(fpSXF, oNextIt->second, SEEK_SET);
        OGRFeature  *poFeature = GetNextRawFeature(oNextIt->first);

        ++oNextIt;

        if (poFeature == nullptr)
            continue;

        if ((m_poFilterGeom == nullptr
            || FilterGeometry(poFeature->GetGeometryRef()))
            && (m_poAttrQuery == nullptr
            || m_poAttrQuery->Evaluate(poFeature)))
        {
            if (poFeature->GetGeometryRef() != nullptr && GetSpatialRef() != nullptr)
            {
                poFeature->GetGeometryRef()->assignSpatialReference(GetSpatialRef());
            }

            return poFeature;
        }

        delete poFeature;
    }
    return nullptr;
}

/************************************************************************/
/*                           TestCapability()                           */
/************************************************************************/

int OGRSXFLayer::TestCapability( const char * pszCap )

{
    if (EQUAL(pszCap, OLCStringsAsUTF8))
        return TRUE;
    else if (EQUAL(pszCap, OLCRandomRead))
        return TRUE;
    else if (EQUAL(pszCap, OLCFastFeatureCount))
        return TRUE;
    else if (EQUAL(pszCap, OLCFastGetExtent))
        return TRUE;
    else if (EQUAL(pszCap, OLCFastSetNextByIndex))
        return TRUE;

    return FALSE;
}

/************************************************************************/
/*                                TranslateXYH()                        */
/************************************************************************/
/****
 * TODO : Take into account information given in the passport
 * like unit of measurement, type and dimensions (integer, float, double) of
 * coordinate, the vector format, etc.
 */

GUInt32 OGRSXFLayer::TranslateXYH( const SXFRecordDescription& certifInfo,
                                   const char *psBuff, GUInt32 nBufLen,
                                   double *dfX, double *dfY, double *dfH )
{
    // Xp, Yp(м) = Xo, Yo(м) + (Xd, Yd / R * S), (1)

    int offset = 0;
    switch (certifInfo.eValType)
    {
    case SXF_VT_SHORT:
    {
        if( nBufLen < 4 )
            return 0;
        GInt16 x = 0;
        GInt16 y = 0;
        memcpy(&y, psBuff, 2);
        CPL_LSBPTR16(&y);
        memcpy(&x, psBuff + 2, 2);
        CPL_LSBPTR16(&x);

        if (stSXFMapDescription.bIsRealCoordinates)
        {
            *dfX = (double)x;
            *dfY = (double)y;
        }
        else
        {
            if (m_nSXFFormatVer == 3)
            {
                *dfX = stSXFMapDescription.dfXOr + (double)x * m_dfCoeff;
                *dfY = stSXFMapDescription.dfYOr + (double)y * m_dfCoeff;
            }
            else if (m_nSXFFormatVer == 4)
            {
                //TODO: check on real data
                *dfX = stSXFMapDescription.dfXOr + (double)x * m_dfCoeff;
                *dfY = stSXFMapDescription.dfYOr + (double)y * m_dfCoeff;
            }
        }

        offset += 4;

        if (dfH != nullptr)
        {
            if( nBufLen < 4 + 4 )
                return 0;
            float h = 0.0f;
            memcpy(&h, psBuff + 4, 4); // H always in float
            CPL_LSBPTR32(&h);
            *dfH = (double)h;

            offset += 4;
        }
    }
        break;
    case SXF_VT_FLOAT:
    {
        if( nBufLen < 8 )
            return 0;
        float y = 0.0f;
        memcpy(&y, psBuff, 4);
        CPL_LSBPTR32(&y);
        float x = 0.0f;
        memcpy(&x, psBuff + 4, 4);
        CPL_LSBPTR32(&x);

        if (stSXFMapDescription.bIsRealCoordinates)
        {
            *dfX = (double)x;
            *dfY = (double)y;
        }
        else
        {
            *dfX = stSXFMapDescription.dfXOr + (double)x * m_dfCoeff;
            *dfY = stSXFMapDescription.dfYOr + (double)y * m_dfCoeff;
        }

        offset += 8;

        if (dfH != nullptr)
        {
            if( nBufLen < 8 + 4 )
                return 0;
            float h = 0.0f;
            memcpy(&h, psBuff + 8, 4); // H always in float
            CPL_LSBPTR32(&h);
            *dfH = (double)h;

            offset += 4;
        }
    }
        break;
    case SXF_VT_INT:
    {
        if( nBufLen < 8 )
            return 0;
        GInt32 x, y;
        memcpy(&y, psBuff, 4);
        CPL_LSBPTR32(&y);
        memcpy(&x, psBuff + 4, 4);
        CPL_LSBPTR32(&x);

        if (stSXFMapDescription.bIsRealCoordinates)
        {
            *dfX = (double)x;
            *dfY = (double)y;
        }
        else
        {
            //TODO: check on real data
            if (m_nSXFFormatVer == 3)
            {
                *dfX = stSXFMapDescription.dfXOr + (double)x * m_dfCoeff;
                *dfY = stSXFMapDescription.dfYOr + (double)y * m_dfCoeff;
            }
            else if (m_nSXFFormatVer == 4)
            {
                *dfX = stSXFMapDescription.dfXOr + (double)x * m_dfCoeff;
                *dfY = stSXFMapDescription.dfYOr + (double)y * m_dfCoeff;
            }
        }
        offset += 8;

        if (dfH != nullptr)
        {
            if( nBufLen < 8 + 4 )
                return 0;
            float h = 0.0f;
            memcpy(&h, psBuff + 8, 4); // H always in float
            CPL_LSBPTR32(&h);
            *dfH = (double)h;

            offset += 4;
        }
    }
        break;
    case SXF_VT_DOUBLE:
    {
        if( nBufLen < 16 )
            return 0;
        double x = 0.0;
        double y = 0.0;
        memcpy(&y, psBuff, 8);
        CPL_LSBPTR64(&y);
        memcpy(&x, psBuff + 8, 8);
        CPL_LSBPTR64(&x);

        if (stSXFMapDescription.bIsRealCoordinates)
        {
            *dfX = x;
            *dfY = y;
        }
        else
        {
            *dfX = stSXFMapDescription.dfXOr + x * m_dfCoeff;
            *dfY = stSXFMapDescription.dfYOr + y * m_dfCoeff;
        }

        offset += 16;

        if (dfH != nullptr)
        {
            if( nBufLen < 16 + 8 )
                return 0;
            double h = 0.0;
            memcpy(&h, psBuff + 16, 8); // H in double
            CPL_LSBPTR64(&h);
            *dfH = (double)h;

            offset += 8;
        }
    }
        break;
    };

    return offset;
}

/************************************************************************/
/*                         GetNextRawFeature()                          */
/************************************************************************/

OGRFeature *OGRSXFLayer::GetNextRawFeature(long nFID)
{
    SXFRecordHeader stRecordHeader;
    int nObjectRead = static_cast<int>(
        VSIFReadL(&stRecordHeader, sizeof(SXFRecordHeader), 1, fpSXF));

    if (nObjectRead != 1 || stRecordHeader.nID != IDSXFOBJ)
    {
        CPLError(CE_Failure, CPLE_FileIO, "SXF. Read record failed.");
        return nullptr;
    }

    SXFGeometryType eGeomType = SXF_GT_Unknown;
    GByte code = 0;

    if (m_nSXFFormatVer == 3)
    {
        if (CHECK_BIT(stRecordHeader.nRef[2], 3))
        {
            if (CHECK_BIT(stRecordHeader.nRef[2], 4))
            {
                code = 0x22;
                stRecordHeader.nSubObjectCount = 0;
            }
            else
            {
                code = 0x21;
                stRecordHeader.nSubObjectCount = 0;
            }
        }
        else
        {
            code = stRecordHeader.nRef[0] & 3;//get first 2 bits
        }
    }
    else if (m_nSXFFormatVer == 4)
    {
        if (CHECK_BIT(stRecordHeader.nRef[2], 5))
        {
            stRecordHeader.nSubObjectCount = 0;
        }

        //check if vector
        code = stRecordHeader.nRef[0] & 15;//get first 4 bits
        if (code == 0x04) // xxxx0100
        {
            code = 0x21;
            stRecordHeader.nSubObjectCount = 0;
            //if (CHECK_BIT(stRecordHeader.nRef[2], 5))
            //{
            //    code = 0x22;
            //    stRecordHeader.nSubObjectCount = 0;
            //}
            //else
            //{
            //    code = 0x21;
            //    stRecordHeader.nSubObjectCount = 0;
            //}
            //if (CHECK_BIT(stRecordHeader.nRef[2], 4))
            //{
            //}
            //else
            //{
            //}
        }
    }

    if (code == 0x00) // xxxx0000
        eGeomType = SXF_GT_Line;
    else if (code == 0x01) // xxxx0001
        eGeomType = SXF_GT_Polygon;
    else if (code == 0x02) // xxxx0010
        eGeomType = SXF_GT_Point;
    else if (code == 0x03) // xxxx0011
        eGeomType = SXF_GT_Text;
#ifdef not_possible_given_above_code /* see below code too if re-enabling this */
    //beginning 4.0
    else if (code == 0x04) // xxxx0100
    {
        CPLError(CE_Warning, CPLE_NotSupported,
            "SXF. Not support type.");
        eGeomType = SXF_GT_Vector;
    }
#endif
    else if (code == 0x05) // xxxx0101
        eGeomType = SXF_GT_TextTemplate;
    else if (code == 0x21)
        eGeomType = SXF_GT_VectorAngle;
    else if (code == 0x22)
        eGeomType = SXF_GT_VectorScaled;

    bool bHasAttributes = CHECK_BIT(stRecordHeader.nRef[1], 1);
    bool bHasRefVector = CHECK_BIT(stRecordHeader.nRef[1], 3);
    if (bHasRefVector == true)
        CPLError(CE_Failure, CPLE_NotSupported,
        "SXF. Parsing the vector of the tying not support.");

    SXFRecordDescription stCertInfo;
    if (stRecordHeader.nPointCountSmall == 65535)
    {
        stCertInfo.nPointCount = stRecordHeader.nPointCount;
    }
    else
    {
        stCertInfo.nPointCount = stRecordHeader.nPointCountSmall;
    }
    stCertInfo.nSubObjectCount = stRecordHeader.nSubObjectCount;

    bool bFloatType(false), bBigType(false);
    bool b3D(true);
    if (m_nSXFFormatVer == 3)
    {
        b3D = CHECK_BIT(stRecordHeader.nRef[2], 1);
        bFloatType = CHECK_BIT(stRecordHeader.nRef[2], 2);
        bBigType = CHECK_BIT(stRecordHeader.nRef[1], 2);
        stCertInfo.bHasTextSign = CHECK_BIT(stRecordHeader.nRef[2], 5);
    }
    else if (m_nSXFFormatVer == 4)
    {
        b3D = CHECK_BIT(stRecordHeader.nRef[2], 1);
        bFloatType = CHECK_BIT(stRecordHeader.nRef[2], 2);
        bBigType = CHECK_BIT(stRecordHeader.nRef[1], 2);
        stCertInfo.bHasTextSign = CHECK_BIT(stRecordHeader.nRef[2], 3);
    }
    // Else trouble.

    if (b3D) //xxxxxx1x
        stCertInfo.bDim = 1;
    else
        stCertInfo.bDim = 0;

    if (bFloatType)
    {
        if (bBigType)
        {
            stCertInfo.eValType = SXF_VT_DOUBLE;
        }
        else
        {
            stCertInfo.eValType = SXF_VT_FLOAT;
        }
    }
    else
    {
        if (bBigType)
        {
            stCertInfo.eValType = SXF_VT_INT;
        }
        else
        {
            stCertInfo.eValType = SXF_VT_SHORT;
        }
    }

    stCertInfo.bFormat = CHECK_BIT(stRecordHeader.nRef[2], 0);
    stCertInfo.eGeomType = eGeomType;

    OGRFeature *poFeature = nullptr;
    if( stRecordHeader.nGeometryLength > 100 * 1024 * 1024 )
        return nullptr;
    char * recordCertifBuf = (char *)VSI_MALLOC_VERBOSE(stRecordHeader.nGeometryLength);
    if( recordCertifBuf == nullptr )
        return nullptr;
    nObjectRead = static_cast<int>(VSIFReadL(recordCertifBuf, stRecordHeader.nGeometryLength, 1, fpSXF));
    if (nObjectRead != 1)
    {
        CPLError(CE_Failure, CPLE_FileIO,
            "SXF. Read geometry failed.");
        CPLFree(recordCertifBuf);
        return nullptr;
    }

    if (eGeomType == SXF_GT_Point)
        poFeature = TranslatePoint(stCertInfo, recordCertifBuf,
                                   stRecordHeader.nGeometryLength);
    else if (eGeomType == SXF_GT_Line || eGeomType == SXF_GT_VectorScaled)
        poFeature = TranslateLine(stCertInfo, recordCertifBuf,
                                   stRecordHeader.nGeometryLength);
    else if (eGeomType == SXF_GT_Polygon)
        poFeature = TranslatePolygon(stCertInfo, recordCertifBuf,
                                   stRecordHeader.nGeometryLength);
    else if (eGeomType == SXF_GT_Text)
        poFeature = TranslateText(stCertInfo, recordCertifBuf,
                                   stRecordHeader.nGeometryLength);
    else if (eGeomType == SXF_GT_VectorAngle)
    {
        poFeature = TranslateVetorAngle(stCertInfo, recordCertifBuf,
            stRecordHeader.nGeometryLength);
    }
#ifdef not_possible_given_above_code
    else if (eGeomType == SXF_GT_Vector )
    {
      CPLError( CE_Warning, CPLE_NotSupported,
      "SXF. Geometry type Vector do not support." );
      CPLFree(recordCertifBuf);
      return NULL;
    }
#endif
    else if (eGeomType == SXF_GT_TextTemplate ) // TODO realise this
    {
      CPLError( CE_Warning, CPLE_NotSupported,
      "SXF. Geometry type Text Template do not support." );
      CPLFree(recordCertifBuf);
      return nullptr;
    }
    else
    {
        CPLError(CE_Failure, CPLE_NotSupported,
            "SXF. Unsupported geometry type.");
        CPLFree(recordCertifBuf);
        return nullptr;
    }

    if( poFeature == nullptr )
    {
        CPLFree(recordCertifBuf);
        return nullptr;
    }

    poFeature->SetField(sFIDColumn_, (int)nFID);

    poFeature->SetField("CLCODE", (int)stRecordHeader.nClassifyCode);

    CPLString szName = mnClassificators[stRecordHeader.nClassifyCode];

    if (szName.empty())
    {
        szName.Printf("%d", stRecordHeader.nClassifyCode);
    }
    poFeature->SetField("CLNAME", szName);

    poFeature->SetField("OBJECTNUMB", stRecordHeader.nSubObjectCount);

    if (bHasAttributes)
    {
        if( stRecordHeader.nFullLength < 32 ||
            stRecordHeader.nGeometryLength > stRecordHeader.nFullLength - 32 )
        {
            CPLFree(recordCertifBuf);
            delete poFeature;
            return nullptr;
        }
        size_t  nSemanticsSize = stRecordHeader.nFullLength - 32 - stRecordHeader.nGeometryLength;
        if( nSemanticsSize > 1024 * 1024 )
        {
            CPLFree(recordCertifBuf);
            delete poFeature;
            return nullptr;
        }
        char * psSemanticsdBuf = (char *)VSI_MALLOC_VERBOSE(nSemanticsSize);
        if( psSemanticsdBuf == nullptr )
        {
            CPLFree(recordCertifBuf);
            delete poFeature;
            return nullptr;
        }
        char * psSemanticsdBufOrig = psSemanticsdBuf;
        nObjectRead = static_cast<int>(VSIFReadL(psSemanticsdBuf, nSemanticsSize, 1, fpSXF));
        if (nObjectRead == 1)
        {
            size_t offset = 0;
            double nVal = 0;

            while (offset + sizeof(SXFRecordAttributeInfo) < nSemanticsSize)
            {
                char *psSemanticsdBufBeg = psSemanticsdBuf + offset;
                SXFRecordAttributeInfo stAttInfo = *(SXFRecordAttributeInfo*)psSemanticsdBufBeg;
                offset += 4;

                CPLString oFieldName;
                oFieldName.Printf("SC_%d", stAttInfo.nCode);

                CPLString oFieldValue;

                SXFRecordAttributeType eType = (SXFRecordAttributeType)stAttInfo.nType;

                switch (eType)
                {
                case SXF_RAT_ASCIIZ_DOS:
                {
                    unsigned nLen = unsigned(stAttInfo.nScale) + 1;
                    if( nLen > nSemanticsSize || nSemanticsSize - nLen < offset )
                    {
                        nSemanticsSize = 0;
                        break;
                    }
                    char * value = (char*)CPLMalloc(nLen);
                    memcpy(value, psSemanticsdBuf + offset, nLen);
                    value[nLen-1] = 0;
                    char* pszRecoded = CPLRecode(value, "CP866", CPL_ENC_UTF8);
                    poFeature->SetField(oFieldName, pszRecoded);
                    CPLFree(pszRecoded);
                    CPLFree(value);

                    offset += stAttInfo.nScale + 1;
                    break;
                }
                case SXF_RAT_ONEBYTE:
                {
                    if( offset + sizeof(GByte) > nSemanticsSize )
                    {
                        nSemanticsSize = 0;
                        break;
                    }
                    GByte nTmpVal = 0;
                    memcpy(&nTmpVal, psSemanticsdBuf + offset, sizeof(GByte));
                    nVal = double(nTmpVal) * pow(10.0, (double)stAttInfo.nScale);

                    poFeature->SetField(oFieldName, nVal);
                    offset += 1;
                    break;
                }
                case SXF_RAT_TWOBYTE:
                {
                    if( offset + sizeof(GInt16) > nSemanticsSize )
                    {
                        nSemanticsSize = 0;
                        break;
                    }
                    GInt16 nTmpVal = 0;
                    memcpy(&nTmpVal, psSemanticsdBuf + offset, sizeof(GInt16));
                    nVal = double(CPL_LSBWORD16(nTmpVal)) * pow(10.0, (double)stAttInfo.nScale);

                    poFeature->SetField(oFieldName, nVal);
                    offset += 2;
                    break;
                }
                case SXF_RAT_FOURBYTE:
                {
                    if( offset + sizeof(GInt32) > nSemanticsSize )
                    {
                        nSemanticsSize = 0;
                        break;
                    }
                    GInt32 nTmpVal = 0;
                    memcpy(&nTmpVal, psSemanticsdBuf + offset, sizeof(GInt32));
                    nVal = double(CPL_LSBWORD32(nTmpVal)) * pow(10.0, (double)stAttInfo.nScale);

                    poFeature->SetField(oFieldName, nVal);
                    offset += 4;
                    break;
                }
                case SXF_RAT_EIGHTBYTE:
                {
                    if( offset + sizeof(double) > nSemanticsSize )
                    {
                        nSemanticsSize = 0;
                        break;
                    }
                    double dfTmpVal = 0.0;
                    memcpy(&dfTmpVal, psSemanticsdBuf + offset, sizeof(double));
                    CPL_LSBPTR64(&dfTmpVal);
                    const double d =
                        dfTmpVal * pow(10.0, (double)stAttInfo.nScale);

                    poFeature->SetField(oFieldName, d);

                    offset += 8;
                    break;
                }
                case SXF_RAT_ANSI_WIN:
                {
                    unsigned nLen = unsigned(stAttInfo.nScale) + 1;
                    if( nLen > nSemanticsSize || nSemanticsSize - nLen < offset )
                    {
                        nSemanticsSize = 0;
                        break;
                    }
                    char * value = (char*)CPLMalloc(nLen);
                    memcpy(value, psSemanticsdBuf + offset, nLen);
                    value[nLen-1] = 0;
                    char* pszRecoded = CPLRecode(value, "CP1251", CPL_ENC_UTF8);
                    poFeature->SetField(oFieldName, pszRecoded);
                    CPLFree(pszRecoded);
                    CPLFree(value);

                    offset += nLen;
                    break;
                }
                case SXF_RAT_UNICODE:
                {
                    unsigned nLen = (unsigned(stAttInfo.nScale) + 1) * 2;
                    if(nLen < 2 || nLen > nSemanticsSize || nSemanticsSize - nLen < offset )
                    {
                        nSemanticsSize = 0;
                        break;
                    }
                    char* value = (char*)CPLMalloc(nLen);
                    memcpy(value, psSemanticsdBuf + offset, nLen - 2);
                    value[nLen-1] = 0;
                    value[nLen-2] = 0;
                    char* dst = (char*)CPLMalloc(nLen);
                    int nCount = 0;
                    for(int i = 0; (unsigned)i < nLen; i += 2)
                    {
                         unsigned char ucs = value[i];

                         if (ucs < 0x80U)
                         {
                             dst[nCount++] = ucs;
                         }
                         else
                         {
                             dst[nCount++] = 0xc0 | (ucs >> 6);
                             dst[nCount++] = 0x80 | (ucs & 0x3F);
                         }
                    }

                    poFeature->SetField(oFieldName, dst);
                    CPLFree(dst);
                    CPLFree(value);

                    offset += nLen;
                    break;
                }
                case SXF_RAT_BIGTEXT:
                {
                    if( offset + sizeof(GUInt32) > nSemanticsSize )
                    {
                        nSemanticsSize = 0;
                        break;
                    }
                    GUInt32 scale2 = 0;
                    memcpy(&scale2, psSemanticsdBuf + offset, sizeof(GUInt32));
                    CPL_LSBPTR32(&scale2);
                    /* FIXME add ?: offset += sizeof(GUInt32); */
                    if( scale2 > nSemanticsSize - 1 || nSemanticsSize - (scale2 + 1) < offset )
                    {
                        nSemanticsSize = 0;
                        break;
                    }

                    char * value = (char*)CPLMalloc(scale2 + 1);
                    memcpy(value, psSemanticsdBuf + offset, scale2 + 1);
                    value[scale2] = 0;
                    char* pszRecoded = CPLRecode(value, CPL_ENC_UTF16, CPL_ENC_UTF8);
                    poFeature->SetField(oFieldName, pszRecoded);
                    CPLFree(pszRecoded);
                    CPLFree(value);

                    offset += scale2;
                    break;
                }
                default:
                    CPLFree(recordCertifBuf);
                    CPLFree(psSemanticsdBufOrig);
                    delete poFeature;
                    return nullptr;
                }
            }
        }
        CPLFree(psSemanticsdBufOrig);
     }

    poFeature->SetFID(nFID);

    CPLFree(recordCertifBuf);

    return poFeature;
}

/************************************************************************/
/*                         TranslatePoint   ()                          */
/************************************************************************/

OGRFeature *OGRSXFLayer::TranslatePoint(const SXFRecordDescription& certifInfo,
                                        const char * psRecordBuf, GUInt32 nBufLen)
{
    double dfX = 1.0;
    double dfY = 1.0;
    double dfZ = 0.0;
    GUInt32 nOffset = 0;
    GUInt32 nDelta = 0;

    if (certifInfo.bDim == 1)
    {
        nDelta = TranslateXYH( certifInfo, psRecordBuf , nBufLen, &dfX, &dfY, &dfZ );
    }
    else
    {
        nDelta = TranslateXYH( certifInfo, psRecordBuf , nBufLen, &dfX, &dfY );
    }

    if( nDelta == 0 )
        return nullptr;
    nOffset += nDelta;

    //OGRFeatureDefn *fd = poFeatureDefn->Clone();
    //fd->SetGeomType( wkbMultiPoint );
 //   OGRFeature *poFeature = new OGRFeature(fd);
    OGRFeature *poFeature = new OGRFeature(poFeatureDefn);
    OGRMultiPoint* poMPt = new OGRMultiPoint();

    poMPt->addGeometryDirectly( new OGRPoint( dfX, dfY, dfZ ) );

/*---------------------- Reading SubObjects --------------------------------*/

    for(int count=0 ; count <  certifInfo.nSubObjectCount ; count++)
    {
        if( nOffset + 4 > nBufLen )
            break;

        GUInt16 nSubObj = 0;
        memcpy(&nSubObj, psRecordBuf + nOffset, 2);
        CPL_LSBPTR16(&nSubObj);

        GUInt16 nCoords = 0;
        memcpy(&nCoords, psRecordBuf + nOffset + 2, 2);
        CPL_LSBPTR16(&nCoords);

        nOffset +=4;

        for( int i=0; i < nCoords ; i++ )
        {
            const char * psCoords = psRecordBuf + nOffset ;

            if (certifInfo.bDim == 1)
            {
                nDelta = TranslateXYH( certifInfo, psCoords, nBufLen - nOffset, &dfX, &dfY, &dfZ );
            }
            else
            {
                dfZ = 0.0;
                nDelta = TranslateXYH( certifInfo, psCoords, nBufLen - nOffset, &dfX, &dfY );
            }

            if( nDelta == 0 )
                break;
            nOffset +=  nDelta;

            poMPt->addGeometryDirectly( new OGRPoint( dfX, dfY, dfZ ) );
        }
    }

/*****
 * TODO :
 *          - Translate graphics
 *          - Translate 3D vector
 */

    poFeature->SetGeometryDirectly( poMPt );

    return poFeature;
}

/************************************************************************/
/*                         TranslateLine    ()                          */
/************************************************************************/

OGRFeature *OGRSXFLayer::TranslateLine(const SXFRecordDescription& certifInfo,
                                       const char * psRecordBuf, GUInt32 nBufLen)
{
    double dfX = 1.0;
    double dfY = 1.0;
    double dfZ = 0.0;
    GUInt32 nOffset = 0;
    GUInt32 nDelta = 0;

    //OGRFeatureDefn *fd = poFeatureDefn->Clone();
    //fd->SetGeomType( wkbMultiLineString );
 //   OGRFeature *poFeature = new OGRFeature(fd);

    OGRFeature *poFeature = new OGRFeature(poFeatureDefn);
    OGRMultiLineString *poMLS = new  OGRMultiLineString ();

/*---------------------- Reading Primary Line --------------------------------*/

    OGRLineString* poLS = new OGRLineString();

    for(GUInt32 count=0 ; count <  certifInfo.nPointCount ; count++)
    {
        const char * psCoords = psRecordBuf + nOffset ;

        if (certifInfo.bDim == 1)
        {
            nDelta = TranslateXYH( certifInfo, psCoords, nBufLen - nOffset, &dfX, &dfY, &dfZ );
        }
        else
        {
            dfZ = 0.0;
            nDelta = TranslateXYH( certifInfo, psCoords, nBufLen - nOffset, &dfX, &dfY );
        }

        if( nDelta == 0 )
            break;
        nOffset += nDelta;

        poLS->addPoint( dfX, dfY, dfZ );
    }

    poMLS->addGeometry( poLS );

/*---------------------- Reading Sub Lines --------------------------------*/

    for(GUInt16 count=0 ; count <  certifInfo.nSubObjectCount ; count++)
    {
        poLS->empty();

        if( nOffset + 4 > nBufLen )
            break;

        GUInt16 nSubObj = 0;
        memcpy(&nSubObj, psRecordBuf + nOffset, 2);
        CPL_LSBPTR16(&nSubObj);

        GUInt16 nCoords = 0;
        memcpy(&nCoords, psRecordBuf + nOffset + 2, 2);
        CPL_LSBPTR16(&nCoords);

        nOffset +=4;

        for (GUInt16 i=0; i < nCoords ; i++)
        {
            const char * psCoords = psRecordBuf + nOffset ;
            if (certifInfo.bDim == 1)
            {
                nDelta = TranslateXYH( certifInfo, psCoords, nBufLen - nOffset, &dfX, &dfY, &dfZ );
            }
            else
            {
                dfZ = 0.0;
                nDelta = TranslateXYH( certifInfo, psCoords, nBufLen - nOffset, &dfX, &dfY );
            }

            if( nDelta == 0 )
                break;
            nOffset += nDelta;

            poLS->addPoint( dfX, dfY, dfZ );
        }

        poMLS->addGeometry( poLS );
    }    // for

    delete poLS;
    poFeature->SetGeometryDirectly( poMLS );

/*****
 * TODO :
 *          - Translate graphics
 *          - Translate 3D vector
 */

    return poFeature;
}

/************************************************************************/
/*                       TranslateVetorAngle()                          */
/************************************************************************/

OGRFeature *OGRSXFLayer::TranslateVetorAngle(const SXFRecordDescription& certifInfo,
    const char * psRecordBuf, GUInt32 nBufLen)
{
    if (certifInfo.nPointCount != 2)
    {
        CPLError(CE_Failure, CPLE_NotSupported,
            "SXF. The vector object should have 2 points, but not.");
        return nullptr;
    }

    GUInt32 nOffset = 0;
    GUInt32 nDelta = 0;

    OGRFeature *poFeature = new OGRFeature(poFeatureDefn);
    OGRPoint *poPT = new OGRPoint();

    /*---------------------- Reading Primary Line --------------------------------*/

    OGRLineString* poLS = new OGRLineString();

    for( GUInt32 count = 0; count < certifInfo.nPointCount; count++ )
    {
        const char * psCoords = psRecordBuf + nOffset;

        double dfX = 1.0;
        double dfY = 1.0;
        double dfZ = 0.0;
        if (certifInfo.bDim == 1)
        {
            nDelta = TranslateXYH( certifInfo, psCoords, nBufLen - nOffset, &dfX, &dfY, &dfZ );
        }
        else
        {
            dfZ = 0.0;
            nDelta = TranslateXYH( certifInfo, psCoords, nBufLen - nOffset, &dfX, &dfY );
        }
        if (nDelta == 0)
            break;
        nOffset += nDelta;

        poLS->addPoint(dfX, dfY, dfZ);
    }

    poLS->StartPoint(poPT);

    OGRPoint *poAngPT = new OGRPoint();
    poLS->EndPoint(poAngPT);

    const double xDiff = poPT->getX() - poAngPT->getX();
    const double yDiff = poPT->getY() - poAngPT->getY();
    double dfAngle = atan2(xDiff, yDiff) * TO_DEGREES - 90;
    if (dfAngle < 0)
        dfAngle += 360;

    poFeature->SetGeometryDirectly(poPT);
    poFeature->SetField("ANGLE", dfAngle);

    delete poAngPT;
    delete poLS;

    return poFeature;
}

/************************************************************************/
/*                         TranslatePolygon ()                          */
/************************************************************************/

OGRFeature *OGRSXFLayer::TranslatePolygon(const SXFRecordDescription& certifInfo,
                                          const char * psRecordBuf, GUInt32 nBufLen)
{
    double dfX = 1.0;
    double dfY = 1.0;
    double dfZ = 0.0;
    GUInt32 nOffset = 0;
    GUInt32 nDelta = 0;

    OGRFeature *poFeature = new OGRFeature(poFeatureDefn);
    OGRPolygon *poPoly = new OGRPolygon();
    OGRLineString* poLS = new OGRLineString();

/*---------------------- Reading Primary Polygon --------------------------------*/
    for(GUInt32 count=0 ; count <  certifInfo.nPointCount ; count++)
    {
        const char * psBuf = psRecordBuf + nOffset;
        if (certifInfo.bDim == 1)
        {
            nDelta = TranslateXYH( certifInfo, psBuf, nBufLen - nOffset, &dfX, &dfY, &dfZ );
        }
        else
        {
            dfZ = 0.0;
            nDelta = TranslateXYH( certifInfo, psBuf, nBufLen - nOffset, &dfX, &dfY );
        }

        if( nDelta == 0 )
            break;
        nOffset += nDelta;
        poLS->addPoint( dfX, dfY, dfZ );
    }  // for

    OGRLinearRing *poLR = new OGRLinearRing();
    poLR->addSubLineString( poLS, 0 );

    poPoly->addRingDirectly( poLR );

/*---------------------- Reading Sub Lines --------------------------------*/

    for(int count=0 ; count <  certifInfo.nSubObjectCount ; count++)
    {
        poLS->empty();

        if( nOffset + 4 > nBufLen )
            break;

        GUInt16 nSubObj = 0;
        memcpy(&nSubObj, psRecordBuf + nOffset, 2);
        CPL_LSBPTR16(&nSubObj);

        GUInt16 nCoords = 0;
        memcpy(&nCoords, psRecordBuf + nOffset + 2, 2);
        CPL_LSBPTR16(&nCoords);

        // TODO: Is this really what the buffer size should be?
        if (nCoords * nDelta != nBufLen - nOffset + 2  - 6)
        {
            CPLError(CE_Warning, CPLE_FileIO,
                     "SXF raw feature size incorrect.  "
                     "%d %d",
                   nCoords * nDelta,
                   nBufLen - nOffset + 2 - 6
                   );
            // TODO: How best to gracefully exit and report an issue?
            // break; or cleanup and return NULL?
        }

        nOffset +=4;

        for (int i=0; i < nCoords ; i++)
        {
            const char * psCoords = psRecordBuf + nOffset ;
            if (certifInfo.bDim == 1)
            {
                nDelta = TranslateXYH( certifInfo, psCoords, nBufLen - nOffset, &dfX, &dfY, &dfZ );
            }
            else
            {
                dfZ = 0.0;
                nDelta = TranslateXYH( certifInfo, psCoords, nBufLen - nOffset, &dfX, &dfY );
            }

            if( nDelta == 0 )
                break;
            nOffset += nDelta;

            poLS->addPoint( dfX, dfY, dfZ );
        }

        poLR = new OGRLinearRing();
        poLR->addSubLineString( poLS, 0 );

        poPoly->addRingDirectly( poLR );
    }    // for

    poFeature->SetGeometryDirectly( poPoly );   //poLS);
    delete poLS;

/*****
 * TODO :
 *          - Translate graphics
 *          - Translate 3D vector
 */
    return poFeature;
}

/************************************************************************/
/*                         TranslateText    ()                          */
/************************************************************************/
OGRFeature *OGRSXFLayer::TranslateText(const SXFRecordDescription& certifInfo,
                                       const char * psRecordBuf, GUInt32 nBufLen)
{
    double dfX = 1.0;
    double dfY = 1.0;
    double dfZ = 0.0;
    GUInt32 nOffset = 0;
    GUInt32 nDelta = 0;

    OGRFeature *poFeature = new OGRFeature(poFeatureDefn);
    OGRMultiLineString *poMLS = new  OGRMultiLineString ();

/*---------------------- Reading Primary Line --------------------------------*/

    OGRLineString* poLS = new OGRLineString();

    for(GUInt32 count=0 ; count <  certifInfo.nPointCount ; count++)
    {
        const char * psCoords = psRecordBuf + nOffset ;

        if (certifInfo.bDim == 1)
        {
            nDelta = TranslateXYH( certifInfo, psCoords, nBufLen - nOffset,
                                   &dfX, &dfY, &dfZ );
        }
        else
        {
            dfZ = 0.0;
            nDelta = TranslateXYH( certifInfo, psCoords, nBufLen - nOffset,
                                   &dfX, &dfY );
        }

        if( nDelta == 0 )
            break;
        nOffset += nDelta;

        poLS->addPoint( dfX, dfY, dfZ );
    }

    poMLS->addGeometry( poLS );

/*------------------     READING TEXT VALUE   --------------------------------*/
    CPLString soText;

    if ( certifInfo.bHasTextSign )
    {
        if( nOffset + 1 > nBufLen )
            return poFeature;
        const char * pszTxt = psRecordBuf + nOffset;
        GByte nTextL = (GByte) *pszTxt;
        if( nOffset + 1 + nTextL > nBufLen )
            return poFeature;

        char * pszTextBuf = (char *)CPLMalloc( nTextL+1 );

        strncpy(pszTextBuf, (pszTxt+1),    nTextL);
        pszTextBuf[nTextL] = '\0';

        //TODO: Check encoding from sxf
        char* pszRecoded = CPLRecode(pszTextBuf, "CP1251", CPL_ENC_UTF8);
        soText += pszRecoded;
        CPLFree(pszRecoded);

        CPLFree( pszTextBuf );

        nOffset += nTextL+2;
    }

/*---------------------- Reading Sub Lines --------------------------------*/

    for(int count=0 ; count <  certifInfo.nSubObjectCount ; count++)
    {
        poLS->empty();

        if( nOffset + 4 > nBufLen )
            break;

        GUInt16 nSubObj = 0;
        memcpy(&nSubObj, psRecordBuf + nOffset, 2);
        CPL_LSBPTR16(&nSubObj);

        GUInt16 nCoords = 0;
        memcpy(&nCoords, psRecordBuf + nOffset + 2, 2);
        CPL_LSBPTR16(&nCoords);

        nOffset +=4;

        for (int i=0; i < nCoords ; i++)
        {
            const char * psCoords = psRecordBuf + nOffset ;
            if (certifInfo.bDim == 1)
            {
                nDelta = TranslateXYH( certifInfo, psCoords, nBufLen - nOffset, &dfX, &dfY, &dfZ );
            }
            else
            {
                dfZ = 0.0;
                nDelta = TranslateXYH( certifInfo, psCoords, nBufLen - nOffset, &dfX, &dfY );
            }

            if( nDelta == 0 )
                break;
            nOffset += nDelta;

            poLS->addPoint( dfX, dfY, dfZ );
        }

        poMLS->addGeometry( poLS );

        if ( certifInfo.bHasTextSign )
        {
            if( nOffset + 1 > nBufLen )
                return poFeature;
            const char * pszTxt = psRecordBuf + nOffset;
            GByte nTextL = (GByte) *pszTxt;
            if( nOffset + 1 + nTextL > nBufLen )
                return poFeature;

            char * pszTextBuf = (char *)CPLMalloc( nTextL+1 );

            strncpy(pszTextBuf, (pszTxt+1),    nTextL);
            pszTextBuf[nTextL] = '\0';

            //TODO: Check encoding from sxf
            char* pszRecoded = CPLRecode(pszTextBuf, "CP1251", CPL_ENC_UTF8);
            soText += " " + CPLString(pszRecoded);
            CPLFree(pszRecoded);

            CPLFree( pszTextBuf );

            nOffset += nTextL+2;
        }
    }  // for

    delete poLS;
    poFeature->SetGeometryDirectly( poMLS );

    poFeature->SetField("TEXT", soText);
    return poFeature;
}

const char* OGRSXFLayer::GetFIDColumn()
{
    return sFIDColumn_.c_str();
}
