internal static unsafe byte[] GetBytes(string str, SerializerSession session, out int byteCount)
{
//if first byte is 0 = null
//if first byte is 254 or less, then length is value - 1
//if first byte is 255 then the next 4 bytes are an int32 for length
if (str == null)
{
byteCount = 1;
return(new[] { (byte)0 });
}
byteCount = Utf8.GetByteCount(str);
if (byteCount < 254) //short string
{
var bytes = session.GetBuffer(byteCount + 1);
Utf8.GetBytes(str, 0, str.Length, bytes, 1);
bytes[0] = (byte)(byteCount + 1);
byteCount += 1;
return(bytes);
}
else //long string
{
var bytes = session.GetBuffer(byteCount + 1 + 4);
Utf8.GetBytes(str, 0, str.Length, bytes, 1 + 4);
bytes[0] = 255;
fixed(byte *b = bytes)
* (int *)(b + 1) = byteCount;
byteCount += 1 + 4;
return(bytes);
}
}
public static byte[] ReadLengthEncodedByteArray(this Stream self, SerializerSession session)
{
var length = self.ReadInt32(session);
var buffer = session.GetBuffer(length);
self.Read(buffer, 0, length);
return buffer;
}
public static int ReadInt32(this Stream self, SerializerSession session)
{
var buffer = session.GetBuffer(4);
self.Read(buffer, 0, 4);
var res = BitConverter.ToInt32(buffer, 0);
return res;
}
public static byte[] ReadLengthEncodedByteArray(this Stream self, SerializerSession session)
{
var length = self.ReadInt32(session);
var buffer = session.GetBuffer(length);
self.Read(buffer, 0, length);
return(buffer);
}
public static int ReadInt32(this Stream self, SerializerSession session)
{
var buffer = session.GetBuffer(4);
self.Read(buffer, 0, 4);
var res = BitConverter.ToInt32(buffer, 0);
return(res);
}