public TransmissionType(TransmissionTypeIdentifier identifier, TransmissionTypeClass cls, int index, uint offset, ulong contentLength, byte exponent = 0)
{
Identifier = identifier;
Index = index;
Class = cls;
Offset = offset;
ContentLength = contentLength;
Exponent = exponent;
}
public static byte[] Compose(TransmissionTypeIdentifier identifier, byte[] data)
{
if (data == null || data.Length == 0)
{
return new byte[] { (byte)identifier }
}
;
var cls = (TransmissionTypeClass)((int)identifier >> 6);
if (cls == TransmissionTypeClass.Fixed)
{
return(DC.Combine(new byte[] { (byte)identifier }, 0, 1, data, 0, (uint)data.Length));
}
else
{
var len = (ulong)data.LongLength;
if (len == 0)
{
return(new byte[1] {
(byte)identifier
});
}
else if (len <= 0xFF)
{
var rt = new byte[2 + len];
rt[0] = (byte)((byte)identifier | 0x8);
rt[1] = (byte)len;
Buffer.BlockCopy(data, 0, rt, 2, (int)len);
return(rt);
}
else if (len <= 0xFF_FF)
{
var rt = new byte[3 + len];
rt[0] = (byte)((byte)identifier | 0x10);
rt[1] = (byte)((len >> 8) & 0xFF);
rt[2] = (byte)(len & 0xFF);
Buffer.BlockCopy(data, 0, rt, 3, (int)len);
return(rt);
}
else if (len <= 0xFF_FF_FF)
{
var rt = new byte[4 + len];
rt[0] = (byte)((byte)identifier | 0x18);
rt[1] = (byte)((len >> 16) & 0xFF);
rt[2] = (byte)((len >> 8) & 0xFF);
rt[3] = (byte)(len & 0xFF);
Buffer.BlockCopy(data, 0, rt, 4, (int)len);
return(rt);
}
else if (len <= 0xFF_FF_FF_FF)
{
var rt = new byte[5 + len];
rt[0] = (byte)((byte)identifier | 0x20);
rt[1] = (byte)((len >> 24) & 0xFF);
rt[2] = (byte)((len >> 16) & 0xFF);
rt[3] = (byte)((len >> 8) & 0xFF);
rt[4] = (byte)(len & 0xFF);
Buffer.BlockCopy(data, 0, rt, 5, (int)len);
return(rt);
}
else if (len <= 0xFF_FF_FF_FF_FF)
{
var rt = new byte[6 + len];
rt[0] = (byte)((byte)identifier | 0x28);
rt[1] = (byte)((len >> 32) & 0xFF);
rt[2] = (byte)((len >> 24) & 0xFF);
rt[3] = (byte)((len >> 16) & 0xFF);
rt[4] = (byte)((len >> 8) & 0xFF);
rt[5] = (byte)(len & 0xFF);
Buffer.BlockCopy(data, 0, rt, 6, (int)len);
return(rt);
}
else if (len <= 0xFF_FF_FF_FF_FF_FF)
{
var rt = new byte[7 + len];
rt[0] = (byte)((byte)identifier | 0x30);
rt[1] = (byte)((len >> 40) & 0xFF);
rt[2] = (byte)((len >> 32) & 0xFF);
rt[3] = (byte)((len >> 24) & 0xFF);
rt[4] = (byte)((len >> 16) & 0xFF);
rt[5] = (byte)((len >> 8) & 0xFF);
rt[6] = (byte)(len & 0xFF);
Buffer.BlockCopy(data, 0, rt, 7, (int)len);
return(rt);
}
else //if (len <= 0xFF_FF_FF_FF_FF_FF_FF)
{
var rt = new byte[8 + len];
rt[0] = (byte)((byte)identifier | 0x38);
rt[1] = (byte)((len >> 48) & 0xFF);
rt[2] = (byte)((len >> 40) & 0xFF);
rt[3] = (byte)((len >> 32) & 0xFF);
rt[4] = (byte)((len >> 24) & 0xFF);
rt[5] = (byte)((len >> 16) & 0xFF);
rt[6] = (byte)((len >> 8) & 0xFF);
rt[7] = (byte)(len & 0xFF);
Buffer.BlockCopy(data, 0, rt, 8, (int)len);
return(rt);
}
//else // if (len <= 0xFF_FF_FF_FF_FF_FF_FF_FF)
//{
// var rt = new byte[9 + len];
// rt[0] = (byte)((byte)identifier | 0x8);
// rt[1] = (byte)((len >> 56) & 0xFF);
// rt[2] = (byte)((len >> 48) & 0xFF);
// rt[3] = (byte)((len >> 40) & 0xFF);
// rt[4] = (byte)((len >> 32) & 0xFF);
// rt[5] = (byte)((len >> 24) & 0xFF);
// rt[6] = (byte)((len >> 16) & 0xFF);
// rt[7] = (byte)((len >> 8) & 0xFF);
// rt[8] = (byte)(len & 0xFF);
// Buffer.BlockCopy(data, 0, rt, 9, (int)len);
// return rt;
//}
// // add length
// int bytes = 1;
//for (var i = 56; i > 0; i -= 8, bytes++)
// if (len <= (0xFF_FF_FF_FF_FF_FF_FF_FF >> i))
// break;
//var rt = new byte[1 + bytes + data.Length];
//rt[0] = (byte)((byte)identifier | (bytes << 3));
//for (var i = 1; i <= bytes; i++)
// rt[i] = data.LongLength >> i * 8;
//Buffer.BlockCopy(data, 0, rt, 1 + bytes, data.Length);
}
}