public Record(byte[] data, int pointer, bool isQuestion = false)
{
var previousePointer = pointer;
Name = GetName(data, ref pointer);
QType = MyBitConverter.ToUInt16(data, ref pointer);
if (!availableTypes.Contains(QType))
{
throw new Exception($"Incorrect type {QType}");
}
QClass = MyBitConverter.ToUInt16(data, ref pointer);
if (isQuestion)
{
LengthRecord = pointer - previousePointer;
Pointer = pointer;
return;
}
Ttl = MyBitConverter.ToUInt32(data, ref pointer);
DataLenght = MyBitConverter.ToUInt16(data, ref pointer);
PointerToData = (ushort)pointer;
Data = data.Skip(pointer).Take(DataLenght);
Pointer = pointer + DataLenght;
LengthRecord = Pointer - previousePointer;
}
/// <summary>
/// Loads TIFF header from stream.
/// </summary>
/// <param name="stream">Fully formatted TIFF image.</param>
/// <returns>Length of header.</returns>
protected override long Load(Stream stream)
{
base.Load(stream);
byte[] temp = stream.ReadBytes(8);
if (!CheckIdentifier(temp))
{
throw new FormatException("Stream is not a recognised TIFF image.");
}
// Change byte order if required.
if (temp[0] == 'M')
{
endianness = MyBitConverter.Endianness.BigEndian;
}
// Header
FirstImageOffset = MyBitConverter.ToUInt32(temp, 4, endianness);
stream.Seek(FirstImageOffset, SeekOrigin.Begin);
var IFD = new ImageFileDirectory(stream, endianness);
Pages = new List <ImageFileDirectory>()
{
IFD
};
// Add mipmaps if they exist
while (IFD.NextIFDOffset != 0)
{
IFD = new ImageFileDirectory(stream, endianness);
Pages.Add(IFD);
}
return(0); // No sensible return value since header is not contiguous (right?)
}