public static ExthHeader Read(Stream stream, long offset)
{
ExthHeader result = new ExthHeader();
stream.Seek(offset, SeekOrigin.Begin);
if (stream.TryReadString(4, out string identifier))
{
result.Identifier = identifier;
}
if (stream.TryReadUint(out uint length))
{
result.Length = length;
}
if (stream.TryReadUint(out uint count))
{
result.RecordCount = count;
}
for (int i = 0; i < count; i++)
{
var exthRecord = ReadRecord(stream, stream.Position);
if (exthRecord != null)
{
result.RecordList.Add(exthRecord);
}
}
uint padding = (4 - length % 4) % 4;
stream.Seek(offset + length + padding, SeekOrigin.Begin); //skip to end, included padding
return(result);
}
public static bool TryRead(Stream stream, long offset, out ExthHeader exthHeader)
{
bool result = false;
exthHeader = null;
stream.Seek(offset, SeekOrigin.Begin);
if (stream.CheckStart(4, Identifier))
{
exthHeader = Read(stream, offset);
result = true;
}
if (!result)
{
stream.Seek(offset, SeekOrigin.Begin);
}
return(result);
}
public static void Write(ExthHeader file, Stream stream)
{
}
