public static void ValidateSentinel(this BitReader reader, byte[] expectedSentinel)
{
if (expectedSentinel.Length != 16)
{
throw new InvalidOperationException("Expected sentinel must be 16 bytes");
}
reader.AlignToByte();
ValidateBytes(reader, expectedSentinel);
}
internal static DwgHeaderVariables Parse(BitReader reader, DwgVersionId version)
{
var header = new DwgHeaderVariables();
reader.ValidateSentinel(StartSentinel);
reader.StartCrcCheck();
var size = reader.Read_RL();
var startOffset = reader.Offset;
header.ReadVariables(reader, version);
reader.AlignToByte();
var unreadByteCount = Math.Max(startOffset + size - reader.Offset, 0);
var unreadBytes = reader.ReadBytes(unreadByteCount);
reader.ValidateCrc(initialValue: InitialCrcValue);
reader.ValidateSentinel(EndSentinel);
return(header);
}
