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// Encoding request is: 16 0 6 0 7 0 0 0 4 0 0 0 68 84 67 0
// 16 bytes, mensagem tipo 6, DTC version 7, encoding type 4, "DTC/0"
// Encoding response is: 16 0 7 0 7 0 0 0 4 0 0 0 68 84 67 0
def createBinaryEncodingRequest(): ByteString = {
// Hardcoded encoding response expected by SierraChart.
val output = ByteBuffer.allocate(16).order(ByteOrder.LITTLE_ENDIAN)
output.putShort(16) // message size
output.putShort(DTC_PB.DTCMessageType.ENCODING_REQUEST_VALUE.toShort) //message type: encoding request(equals 6)
output.putInt(protocolVersion)
output.putInt(4) // encoding type 4: requesting Protocol buffer format
output.put('D'.toByte)
output.put('T'.toByte)
output.put('C'.toByte)
output.put(0.toByte)

val o = output.array()
ByteString(o)
}

def createBinaryEncodingResponse(): ByteString = {
// Hardcoded encoding response expected by SierraChart.
val output = ByteBuffer.allocate(16).order(ByteOrder.LITTLE_ENDIAN)
output.putShort(16) // message size
output.putShort(DTC_PB.DTCMessageType.ENCODING_RESPONSE_VALUE.toShort) //message type: encoding response(equals 7)
output.putInt(protocolVersion)
output.putInt(4) // encoding type 4: tell the client that the server will use Protocol buffer
output.put('D'.toByte)
output.put('T'.toByte)
output.put('C'.toByte)
output.put(0.toByte)

val o = output.array()
ByteString(o)
}