void QgsMssqlGeometryParser::ReadGeometryCollection( int iShape )
{
int i;
int iCount = nNumShapes - iShape - 1;;
if ( iCount <= 0 )
return;
// copy byte order
CopyBytes( &chByteOrder, 1 );
// copy type
int wkbType = QGis::WKBUnknown;;
CopyBytes( &wkbType, 4 );
// copy geom count
CopyBytes( &iCount, 4 );
for ( i = iShape + 1; i < nNumShapes; i++ )
{
if ( ParentOffset( i ) == ( unsigned int )iShape )
{
switch ( ShapeType( i ) )
{
case ST_POINT:
ReadPoint( i );
break;
case ST_LINESTRING:
ReadLineString( i );
break;
case ST_POLYGON:
ReadPolygon( i );
break;
case ST_MULTIPOINT:
ReadMultiPoint( i );
break;
case ST_MULTILINESTRING:
ReadMultiLineString( i );
break;
case ST_MULTIPOLYGON:
ReadMultiPolygon( i );
break;
case ST_GEOMETRYCOLLECTION:
ReadGeometryCollection( i );
break;
}
}
}
}
OGRGeometryCollection* OGRMSSQLGeometryParser::ReadGeometryCollection(int iShape)
{
int i;
OGRGeometryCollection* poGeomColl = new OGRGeometryCollection();
OGRGeometry* poGeom;
for (i = iShape + 1; i < nNumShapes; i++)
{
poGeom = NULL;
if (ParentOffset(i) == (unsigned int)iShape)
{
switch (ShapeType(i))
{
case ST_POINT:
poGeom = ReadPoint(i);
break;
case ST_LINESTRING:
poGeom = ReadLineString(i);
break;
case ST_POLYGON:
poGeom = ReadPolygon(i);
break;
case ST_MULTIPOINT:
poGeom = ReadMultiPoint(i);
break;
case ST_MULTILINESTRING:
poGeom = ReadMultiLineString(i);
break;
case ST_MULTIPOLYGON:
poGeom = ReadMultiPolygon(i);
break;
case ST_GEOMETRYCOLLECTION:
poGeom = ReadGeometryCollection(i);
break;
}
}
if ( poGeom )
poGeomColl->addGeometryDirectly( poGeom );
}
return poGeomColl;
}
mapnik::geometry::geometry_collection<double> sqlserver_geometry_parser::ReadGeometryCollection(int iShape)
{
mapnik::geometry::geometry_collection<double> geom;
for (int i = iShape + 1; i < nNumShapes; i++) {
mapnik::geometry::geometry<double> shape = mapnik::geometry::geometry_empty();
if (ParentOffset(i) == (unsigned int)iShape) {
switch (ShapeType(i))
{
case ST_POINT:
shape = ReadPoint(i);
break;
case ST_LINESTRING:
shape = ReadLineString(i);
break;
case ST_POLYGON:
shape = ReadPolygon(i);
break;
case ST_MULTIPOINT:
shape = ReadMultiPoint(i);
break;
case ST_MULTILINESTRING:
shape = ReadMultiLineString(i);
break;
case ST_MULTIPOLYGON:
shape = ReadMultiPolygon(i);
break;
case ST_GEOMETRYCOLLECTION:
shape = ReadGeometryCollection(i);
break;
}
}
geom.push_back(shape);
}
return geom;
}
unsigned char* QgsMssqlGeometryParser::ParseSqlGeometry( unsigned char* pszInput, int nLen )
{
if ( nLen < 10 )
{
QgsDebugMsg( "ParseSqlGeometry not enough data" );
DumpMemoryToLog( "Not enough data", pszInput, nLen );
return NULL;
}
pszData = pszInput;
nWkbMaxLen = nLen;
/* store the SRS id for further use */
nSRSId = ReadInt32( 0 );
if ( ReadByte( 4 ) != 1 )
{
QgsDebugMsg( "ParseSqlGeometry corrupt data" );
DumpMemoryToLog( "Corrupt data", pszInput, nLen );
return NULL;
}
chProps = ReadByte( 5 );
if ( chProps & SP_HASZVALUES && chProps & SP_HASMVALUES )
nPointSize = 32;
else if ( chProps & SP_HASZVALUES || chProps & SP_HASMVALUES )
nPointSize = 24;
else
nPointSize = 16;
/* store byte order */
chByteOrder = QgsApplication::endian();
pszWkb = new unsigned char[nLen]; // wkb should be less or equal in size
nWkbLen = 0;
if ( chProps & SP_ISSINGLEPOINT )
{
// single point geometry
nNumPoints = 1;
nPointPos = 6;
if ( nLen < 6 + nPointSize )
{
delete [] pszWkb;
QgsDebugMsg( "ParseSqlGeometry not enough data" );
DumpMemoryToLog( "Not enough data", pszInput, nLen );
return NULL;
}
CopyPoint( 0 );
}
else if ( chProps & SP_ISSINGLELINESEGMENT )
{
// single line segment with 2 points
nNumPoints = 2;
nPointPos = 6;
if ( nLen < 6 + 2 * nPointSize )
{
delete [] pszWkb;
QgsDebugMsg( "ParseSqlGeometry not enough data" );
DumpMemoryToLog( "Not enough data", pszInput, nLen );
return NULL;
}
// copy byte order
CopyBytes( &chByteOrder, 1 );
// copy type
int wkbType;
if ( chProps & SP_HASZVALUES )
wkbType = QGis::WKBLineString25D;
else
wkbType = QGis::WKBLineString;
CopyBytes( &wkbType, 4 );
// copy point count
int iCount = 2;
CopyBytes( &iCount, 4 );
// copy points
CopyCoordinates( 0 );
CopyCoordinates( 1 );
}
else
{
// complex geometries
nNumPoints = ReadInt32( 6 );
if ( nNumPoints <= 0 )
{
delete [] pszWkb;
return NULL;
}
// position of the point array
nPointPos = 10;
// position of the figures
nFigurePos = nPointPos + nPointSize * nNumPoints + 4;
if ( nLen < nFigurePos )
{
delete [] pszWkb;
QgsDebugMsg( "ParseSqlGeometry not enough data" );
DumpMemoryToLog( "Not enough data", pszInput, nLen );
return NULL;
}
nNumFigures = ReadInt32( nFigurePos - 4 );
if ( nNumFigures <= 0 )
{
delete [] pszWkb;
return NULL;
}
// position of the shapes
nShapePos = nFigurePos + 5 * nNumFigures + 4;
if ( nLen < nShapePos )
{
delete [] pszWkb;
QgsDebugMsg( "ParseSqlGeometry not enough data" );
DumpMemoryToLog( "Not enough data", pszInput, nLen );
return NULL;
}
nNumShapes = ReadInt32( nShapePos - 4 );
if ( nLen < nShapePos + 9 * nNumShapes )
{
delete [] pszWkb;
QgsDebugMsg( "ParseSqlGeometry not enough data" );
DumpMemoryToLog( "Not enough data", pszInput, nLen );
return NULL;
}
if ( nNumShapes <= 0 )
{
delete [] pszWkb;
return NULL;
}
// pick up the root shape
if ( ParentOffset( 0 ) != 0xFFFFFFFF )
{
delete [] pszWkb;
QgsDebugMsg( "ParseSqlGeometry corrupt data" );
DumpMemoryToLog( "Not enough data", pszInput, nLen );
return NULL;
}
// determine the shape type
switch ( ShapeType( 0 ) )
{
case ST_POINT:
ReadPoint( 0 );
break;
case ST_LINESTRING:
ReadLineString( 0 );
break;
case ST_POLYGON:
ReadPolygon( 0 );
break;
case ST_MULTIPOINT:
ReadMultiPoint( 0 );
break;
case ST_MULTILINESTRING:
ReadMultiLineString( 0 );
break;
case ST_MULTIPOLYGON:
ReadMultiPolygon( 0 );
break;
//case ST_GEOMETRYCOLLECTION:
//ReadGeometryCollection(0);
//break;
default:
delete [] pszWkb;
QgsDebugMsg( "ParseSqlGeometry unsupported geometry type" );
DumpMemoryToLog( "Unsupported geometry type", pszInput, nLen );
return NULL;
}
}
return pszWkb;
}
OGRErr OGRMSSQLGeometryParser::ParseSqlGeometry(unsigned char* pszInput,
int nLen, OGRGeometry **poGeom)
{
if (nLen < 10)
return OGRERR_NOT_ENOUGH_DATA;
pszData = pszInput;
/* store the SRS id for further use */
nSRSId = ReadInt32(0);
if ( ReadByte(4) != 1 )
{
return OGRERR_CORRUPT_DATA;
}
chProps = ReadByte(5);
if ( chProps & SP_HASMVALUES )
nPointSize = 32;
else if ( chProps & SP_HASZVALUES )
nPointSize = 24;
else
nPointSize = 16;
if ( chProps & SP_ISSINGLEPOINT )
{
// single point geometry
nNumPoints = 1;
nPointPos = 6;
if (nLen < 6 + nPointSize)
{
return OGRERR_NOT_ENOUGH_DATA;
}
if (nColType == MSSQLCOLTYPE_GEOGRAPHY)
{
if (chProps & SP_HASZVALUES)
*poGeom = new OGRPoint(ReadY(0), ReadX(0), ReadZ(0));
else
*poGeom = new OGRPoint(ReadY(0), ReadX(0));
}
else
{
if (chProps & SP_HASZVALUES)
*poGeom = new OGRPoint(ReadX(0), ReadY(0), ReadZ(0));
else
*poGeom = new OGRPoint(ReadX(0), ReadY(0));
}
}
else if ( chProps & SP_ISSINGLELINESEGMENT )
{
// single line segment with 2 points
nNumPoints = 2;
nPointPos = 6;
if (nLen < 6 + 2 * nPointSize)
{
return OGRERR_NOT_ENOUGH_DATA;
}
OGRLineString* line = new OGRLineString();
line->setNumPoints(2);
if (nColType == MSSQLCOLTYPE_GEOGRAPHY)
{
if ( chProps & SP_HASZVALUES )
{
line->setPoint(0, ReadY(0), ReadX(0), ReadZ(0));
line->setPoint(1, ReadY(1), ReadX(1), ReadZ(1));
}
else
{
line->setPoint(0, ReadY(0), ReadX(0));
line->setPoint(1, ReadY(1), ReadX(1));
}
}
else
{
if ( chProps & SP_HASZVALUES )
{
line->setPoint(0, ReadX(0), ReadY(0), ReadZ(0));
line->setPoint(1, ReadX(1), ReadY(1), ReadZ(1));
}
else
{
line->setPoint(0, ReadX(0), ReadY(0));
line->setPoint(1, ReadX(1), ReadY(1));
}
}
*poGeom = line;
}
else
{
// complex geometries
nNumPoints = ReadInt32(6);
if ( nNumPoints <= 0 )
{
return OGRERR_NONE;
}
// position of the point array
nPointPos = 10;
// position of the figures
nFigurePos = nPointPos + nPointSize * nNumPoints + 4;
if (nLen < nFigurePos)
{
return OGRERR_NOT_ENOUGH_DATA;
}
nNumFigures = ReadInt32(nFigurePos - 4);
if ( nNumFigures <= 0 )
{
return OGRERR_NONE;
}
// position of the shapes
nShapePos = nFigurePos + 5 * nNumFigures + 4;
if (nLen < nShapePos)
{
return OGRERR_NOT_ENOUGH_DATA;
}
nNumShapes = ReadInt32(nShapePos - 4);
if (nLen < nShapePos + 9 * nNumShapes)
{
return OGRERR_NOT_ENOUGH_DATA;
}
if ( nNumShapes <= 0 )
{
return OGRERR_NONE;
}
// pick up the root shape
if ( ParentOffset(0) != 0xFFFFFFFF)
{
return OGRERR_CORRUPT_DATA;
}
// determine the shape type
switch (ShapeType(0))
{
case ST_POINT:
*poGeom = ReadPoint(0);
break;
case ST_LINESTRING:
*poGeom = ReadLineString(0);
break;
case ST_POLYGON:
*poGeom = ReadPolygon(0);
break;
case ST_MULTIPOINT:
*poGeom = ReadMultiPoint(0);
break;
case ST_MULTILINESTRING:
*poGeom = ReadMultiLineString(0);
break;
case ST_MULTIPOLYGON:
*poGeom = ReadMultiPolygon(0);
break;
case ST_GEOMETRYCOLLECTION:
*poGeom = ReadGeometryCollection(0);
break;
default:
return OGRERR_UNSUPPORTED_GEOMETRY_TYPE;
}
}
return OGRERR_NONE;
}
mapnik::geometry::geometry<double> sqlserver_geometry_parser::parse(unsigned char* pszInput, int nLen)
{
if (nLen < 10) {
throw sqlserver_geometry_parser_exception("not enough data, nLen < 10");
}
pszData = pszInput;
/* store the SRS id for further use */
nSRSId = ReadInt32(0);
if ( ReadByte(4) != 1 )
{
throw sqlserver_geometry_parser_exception("corrupt data, ReadByte(4) != 1");
}
chProps = ReadByte(5);
if ( chProps & SP_HASMVALUES )
nPointSize = 32;
else if ( chProps & SP_HASZVALUES )
nPointSize = 24;
else
nPointSize = 16;
mapnik::geometry::geometry<double> geom;
if ( chProps & SP_ISSINGLEPOINT )
{
// single point geometry
nNumPoints = 1;
nPointPos = 6;
if (nLen < 6 + nPointSize)
{
throw sqlserver_geometry_parser_exception("not enough data, nLen < 6 + nPointSize");
}
mapnik::geometry::point<double> point;
if (colType == Geography)
{
point.x = ReadY(0);
point.y = ReadX(0);
}
else
{
point.x = ReadX(0);
point.y = ReadY(0);
}
geom = point;
}
else if ( chProps & SP_ISSINGLELINESEGMENT )
{
// single line segment with 2 points
nNumPoints = 2;
nPointPos = 6;
if (nLen < 6 + 2 * nPointSize)
{
throw sqlserver_geometry_parser_exception("not enough data, nLen < 6 + 2 * nPointSize");
}
mapnik::geometry::line_string<double> line;
if (colType == Geography)
{
line.emplace_back(ReadY(0), ReadX(0));
line.emplace_back(ReadY(1), ReadX(1));
}
else
{
line.emplace_back(ReadX(0), ReadY(0));
line.emplace_back(ReadX(1), ReadY(1));
}
geom = line;
}
else
{
// complex geometries
nNumPoints = ReadInt32(6);
if ( nNumPoints <= 0 )
{
throw sqlserver_geometry_parser_exception("negative number of points, nNumPoints <= 0");
}
// position of the point array
nPointPos = 10;
// position of the figures
nFigurePos = nPointPos + nPointSize * nNumPoints + 4;
if (nLen < nFigurePos)
{
throw sqlserver_geometry_parser_exception("not enough data, nLen < nFigurePos");
}
nNumFigures = ReadInt32(nFigurePos - 4);
if ( nNumFigures <= 0 )
{
throw sqlserver_geometry_parser_exception("negative number of figures, nNumFigures <= 0");
}
// position of the shapes
nShapePos = nFigurePos + 5 * nNumFigures + 4;
if (nLen < nShapePos)
{
throw sqlserver_geometry_parser_exception("not enough data, nLen < nShapePos");
}
nNumShapes = ReadInt32(nShapePos - 4);
if (nLen < nShapePos + 9 * nNumShapes)
{
throw sqlserver_geometry_parser_exception("not enough data, nLen < nShapePos + 9 * nNumShapes");
}
if ( nNumShapes <= 0 )
{
throw sqlserver_geometry_parser_exception("negative number of shapes, nNumShapes <= 0");
}
// pick up the root shape
if ( ParentOffset(0) != 0xFFFFFFFF)
{
throw sqlserver_geometry_parser_exception("corrupt data, ParentOffset(0) != 0xFFFFFFFF");
}
// determine the shape type
switch (ShapeType(0))
{
case ST_POINT:
geom = ReadPoint(0);
break;
case ST_LINESTRING:
geom = ReadLineString(0);
break;
case ST_POLYGON:
geom = ReadPolygon(0);
break;
case ST_MULTIPOINT:
geom = ReadMultiPoint(0);
break;
case ST_MULTILINESTRING:
geom = ReadMultiLineString(0);
break;
case ST_MULTIPOLYGON:
geom = ReadMultiPolygon(0);
break;
case ST_GEOMETRYCOLLECTION:
geom = ReadGeometryCollection(0);
break;
default:
throw sqlserver_geometry_parser_exception("unsupported geometry type");
}
}
return geom;
}