/// <summary>
/// Writes the binary encoded PostGIS header.
/// </summary>
/// <param name="byteOrder">The byte order specified.</param>
/// <param name="type">The PostGIS geometry type.</param>
/// <param name="srid">The spatial reference of the geometry</param>
/// <param name="ordinates"></param>
/// <param name="writer">The writer to use.</param>
private static void WriteHeader(PostGisGeometryType type, int srid, Ordinates ordinates, ByteOrder byteOrder, BinaryWriter writer)
{
writer.Write((byte)byteOrder);
// write typeword
var typeword = (uint)type;
if ((ordinates & Ordinates.Z) != 0)
{
typeword |= 0x80000000;
}
if ((ordinates & Ordinates.M) != 0)
{
typeword |= 0x40000000;
}
if (srid != -1)
{
typeword |= 0x20000000;
}
writer.Write(typeword);
if (srid != -1)
{
writer.Write(srid);
}
}
/// <summary>
/// Writes the binary encoded PostGIS header.
/// </summary>
/// <param name="type">The PostGIS geometry type.</param>
/// <param name="srid">The spatial reference of the geometry</param>
/// <param name="emitSrid">Flag indicating that <paramref name="srid"/> should be written</param>
/// <param name="ordinates"></param>
/// <param name="byteOrder">The byte order specified.</param>
/// <param name="writer">The writer to use.</param>
private static void WriteHeader(PostGisGeometryType type, int srid, bool emitSrid, Ordinates ordinates,
ByteOrder byteOrder, BinaryWriter writer)
{
writer.Write((byte)byteOrder);
// write typeword
uint typeword = (uint)type;
if (ordinates.HasFlag(Ordinates.Z))
{
typeword |= 0x80000000;
}
if (ordinates.HasFlag(Ordinates.M))
{
typeword |= 0x40000000;
}
emitSrid &= srid > 0;
if (emitSrid)
{
typeword |= 0x20000000;
}
writer.Write(typeword);
if (emitSrid)
{
writer.Write(srid);
}
}
/// <summary>
///
/// </summary>
/// <param name="geometry"></param>
/// <param name="type"></param>
/// <param name="writer"></param>
private void WriteHeader(IGeometry geometry, PostGisGeometryType type, BinaryWriter writer)
{
writer.Write((byte)encodingType);
// write typeword
uint typeword = (uint)type;
if (hasZ(geometry))
{
typeword |= 0x80000000;
}
//if (geometry.HasMeasure)
// typeword |= 0x40000000;
if (geometry.SRID != -1)
{
typeword |= 0x20000000;
}
writer.Write(typeword);
if (geometry.SRID != -1)
{
writer.Write(geometry.SRID);
}
}
/// <summary>
///
/// </summary>
/// <param name="geometry"></param>
/// <param name="type"></param>
/// <param name="writer"></param>
private void WriteHeader(IGeometry geometry, PostGisGeometryType type, BinaryWriter writer)
{
writer.Write((byte) encodingType);
// write typeword
uint typeword = (uint) type;
if (hasZ(geometry))
typeword |= 0x80000000;
//if (geometry.HasMeasure)
// typeword |= 0x40000000;
if (geometry.SRID != -1)
typeword |= 0x20000000;
writer.Write(typeword);
if (geometry.SRID != -1)
writer.Write(geometry.SRID);
}
/// <summary>
///
/// </summary>
/// <param name="reader"></param>
/// <returns></returns>
protected IGeometry Read(BinaryReader reader)
{
// Dummy read, just for bytes compatibility.
// The byte order is determined only once.
reader.ReadByte();
int typeword = reader.ReadInt32();
// cut off high flag bits
PostGisGeometryType geometryType = (PostGisGeometryType)(typeword & 0x1FFFFFFF);
bool hasZ = (typeword & 0x80000000) != 0;
bool hasM = (typeword & 0x40000000) != 0;
bool hasS = (typeword & 0x20000000) != 0;
int srid = -1;
if (hasS)
{
srid = reader.ReadInt32();
}
IGeometry result;
switch (geometryType)
{
case PostGisGeometryType.Point:
result = ReadPoint(reader, hasZ, hasM);
break;
case PostGisGeometryType.LineString:
result = ReadLineString(reader, hasZ, hasM);
break;
case PostGisGeometryType.Polygon:
result = ReadPolygon(reader, hasZ, hasM);
break;
case PostGisGeometryType.MultiPoint:
result = ReadMultiPoint(reader);
break;
case PostGisGeometryType.MultiLineString:
result = ReadMultiLineString(reader);
break;
case PostGisGeometryType.MultiPolygon:
result = ReadMultiPolygon(reader);
break;
case PostGisGeometryType.GeometryCollection:
result = ReadGeometryCollection(reader);
break;
default:
throw new ArgumentException("Geometry type not recognized. GeometryCode: " + geometryType);
}
result.SRID = hasS ? srid : -1;
return(result);
}
/// <summary>
/// Writes the binary encoded PostGIS header.
/// </summary>
/// <param name="byteOrder">The byte order specified.</param>
/// <param name="type">The PostGIS geometry type.</param>
/// <param name="srid">The spatial reference of the geometry</param>
/// <param name="ordinates"></param>
/// <param name="writer">The writer to use.</param>
private static void WriteHeader(PostGisGeometryType type, int srid, Ordinates ordinates, ByteOrder byteOrder, BinaryWriter writer)
{
writer.Write((byte) byteOrder);
// write typeword
var typeword = (uint) type;
if ((ordinates & Ordinates.Z) != 0)
typeword |= 0x80000000;
if ((ordinates & Ordinates.M) != 0)
typeword |= 0x40000000;
if (srid != -1)
typeword |= 0x20000000;
writer.Write(typeword);
if (srid != -1)
writer.Write(srid);
}
