QgsAbstractGeometryV2* QgsGeometryFactory::geomFromWkb( QgsConstWkbPtr wkbPtr )
{
if ( !wkbPtr )
return nullptr;
//find out type (bytes 2-5)
QgsWKBTypes::Type type = wkbPtr.readHeader();
wkbPtr -= 1 + sizeof( int );
QgsAbstractGeometryV2* geom = nullptr;
geom = geomFromWkbType( type );
if ( geom )
{
try
{
geom->fromWkb( wkbPtr );
}
catch ( const QgsWkbException &e )
{
Q_UNUSED( e );
QgsDebugMsg( "WKB exception: " + e.what() );
delete geom;
geom = nullptr;
}
}
return geom;
}
QgsAbstractGeometryV2* QgsGeometryImport::geomFromWkb( const unsigned char* wkb )
{
if ( !wkb )
{
return 0;
}
//find out type (bytes 2-5)
int type;
memcpy( &type, wkb + 1, sizeof( int ) );
QgsAbstractGeometryV2* geom = 0;
geom = geomFromWkbType( QgsWKBTypes::Type( type ) );
#if 0
type = QgsWKBTypes::flatType( QgsWKBTypes::Type( type ) );
switch ( type )
{
case QgsWKBTypes::Point:
geom = new QgsPointV2();
break;
case QgsWKBTypes::LineString:
geom = new QgsLineStringV2();
break;
case QgsWKBTypes::CircularString:
geom = new QgsCircularStringV2();
break;
case QgsWKBTypes::CompoundCurve:
geom = new QgsCompoundCurveV2();
break;
case QgsWKBTypes::Polygon:
geom = new QgsPolygonV2();
break;
case QgsWKBTypes::CurvePolygon:
geom = new QgsCurvePolygonV2();
break;
case QgsWKBTypes::MultiLineString:
geom = new QgsMultiLineStringV2();
break;
case QgsWKBTypes::MultiPolygon:
geom = new QgsMultiPolygonV2();
break;
case QgsWKBTypes::MultiPoint:
geom = new QgsMultiPointV2();
break;
default:
geom = 0;
}
#endif
if ( geom )
{
geom->fromWkb( wkb );
}
return geom;
}
QgsAbstractGeometryV2* QgsGeometryFactory::geomFromWkb( const unsigned char* wkb )
{
if ( !wkb )
{
return 0;
}
//find out type (bytes 2-5)
int type;
memcpy( &type, wkb + 1, sizeof( int ) );
QgsAbstractGeometryV2* geom = 0;
geom = geomFromWkbType( QgsWKBTypes::Type( type ) );
if ( geom )
{
geom->fromWkb( wkb );
}
return geom;
}
std::unique_ptr<QgsAbstractGeometry> QgsGeometryFactory::geomFromWkb( QgsConstWkbPtr &wkbPtr )
{
if ( !wkbPtr )
return nullptr;
//find out type (bytes 2-5)
QgsWkbTypes::Type type = QgsWkbTypes::Unknown;
try
{
type = wkbPtr.readHeader();
}
catch ( const QgsWkbException &e )
{
Q_UNUSED( e );
QgsDebugMsg( "WKB exception while reading header: " + e.what() );
return nullptr;
}
wkbPtr -= 1 + sizeof( int );
std::unique_ptr< QgsAbstractGeometry > geom = geomFromWkbType( type );
if ( geom )
{
try
{
geom->fromWkb( wkbPtr ); // also updates wkbPtr
}
catch ( const QgsWkbException &e )
{
Q_UNUSED( e );
QgsDebugMsg( "WKB exception: " + e.what() );
geom.reset();
}
}
return geom;
}
