static Position ReadPosition(NpgsqlReadBuffer buf, EwkbGeometryType type, bool littleEndian)
{
var position = new Position(
longitude: buf.ReadDouble(littleEndian),
latitude: buf.ReadDouble(littleEndian),
altitude: HasZ(type) ? buf.ReadDouble() : (double?)null);
if (HasM(type)) buf.ReadDouble(littleEndian);
return position;
}
static int SizeOfPoint(EwkbGeometryType type)
{
var size = SizeOfPoint2D;
if (HasZ(type))
size += sizeof(double);
if (HasM(type))
size += sizeof(double);
return size;
}
static bool HasM(EwkbGeometryType type) => (type & EwkbGeometryType.HasM) != 0;
static bool HasSrid(EwkbGeometryType type) => (type & EwkbGeometryType.HasSrid) != 0;