public static Packet GetNextPacket(this IStreamable stream)
{
int length = stream.GetNextInt();
byte[] buffer = new byte[length];
stream.Read(buffer, 0, length);
return(new Packet(buffer));
}
/// <summary>
///
/// </summary>
public override void OnStreamRead(IStreamable stream)
{
// Read
if (m_PtrSnapshot == -1)
{
// Reset pointer.
m_PtrRec = m_PtrSnapshot = 0;
}
m_SizeRec = stream.Read(m_Buffer, m_PtrRec, m_SizeBuffer - m_PtrRec);
if (m_SizeRec == 0)
{
return;
}
m_SizeRecTotal += m_SizeRec;
// Parse
int
i = m_PtrSnapshot, // Continue last work.
imax = m_PtrRec + m_SizeRec,
end = imax - 1
;
int sum, tail, result = RESULT_NO_PARSE_DATA;
for (; i < imax; ++i) //
{
if (m_Buffer[i] == 0x55)
{
if (end >= i + 2 /*1*/ + m_SizeFixedBuffer) // pEnd
{
if (m_Buffer[i + 2 /*1*/ + m_SizeFixedBuffer] == 0x0AA) // pEnd
//
{
sum = Sum(m_Buffer, i + /*2*/ 1, m_SizeFixedBuffer); // pStart of FixedBuffer
//
tail = m_Buffer[i + /*2*/ 1 + m_SizeFixedBuffer];
if ((sum & 0xFF) - tail == 0)
{
if (m_ReadCallback != null)
{
//
m_IsCompleted = true; m_PtrBuffer = i + /*2*/ 1; // pStart of FixedBuffer
//
m_ReadCallback.OnStreamRead(this);
// Clean up.
m_IsCompleted = false; m_PtrBuffer = -1;
}
i = i + 2 /*1*/ + m_SizeFixedBuffer; //+1; pEnd
result = RESULT_OK; // ????
m_PtrSnapshot = i; // 保存快照.
}
else
{
Log.i("StreamUnpacker", string.Format("Sum failed:sum{0:X2} tail{1:X2}", sum & 0xFF, tail));
}
}
}
else // 长度不够,需要拼接.
{
result = RESULT_NO_ENOUGH_LENGTH; // ????
m_PtrSnapshot = i; // 保存快照.
break;
}
}
}
//Log.i("StreamUnpacker_v0b","OnStreamRead:"+result+" "+m_SizeRec);//+" "+ToHexString(m_Buffer));
// Clean up.
CleanUp(result);
}
public static int GetNextInt(this IStreamable stream)
{
byte[] bytes = new byte[4];
stream.Read(bytes, 0, 4);
return(bytes.ToList().GetNextInt());
}
/// <summary>
///
/// </summary>
public override void OnStreamRead(IStreamable stream)
{
// Read
if (m_PtrSnapshot == -1)
{
// Reset pointer.
m_PtrRec = m_PtrSnapshot = 0;
}
m_SizeRec = stream.Read(m_Buffer, m_PtrRec, m_SizeBuffer - m_PtrRec);
if (m_SizeRec == 0)
{
return;
}
m_SizeRecTotal += m_SizeRec;
// Parse
int
i = m_PtrSnapshot, // Continue last work.
imax = m_PtrRec + m_SizeRec,
end = imax - 1
;
int sum, tail, result = RESULT_NO_PARSE_DATA;
for (; i < imax; ++i) //
{
if (m_Buffer[i] == 0x5A)
{
if (end >= i + 2 + m_SizeFixedBuffer) // pEnd
{
if (m_Buffer[i + 1] == 0xA5)
{
//
sum = Sum(m_Buffer, i + 2, m_SizeFixedBuffer); // pStart of FixedBuffer
//
tail = m_Buffer[i + 2 + m_SizeFixedBuffer];
if ((sum & 0xFF) - tail == 0 || (sum & 0xFF) - tail == 1)
{
if (m_ReadCallback != null)
{
//
m_IsCompleted = true; m_PtrBuffer = i + 2; // pStart of FixedBuffer
//
m_ReadCallback.OnStreamRead(this);
// Clean up.
m_IsCompleted = false; m_PtrBuffer = -1;
}
i = i + 2 + m_SizeFixedBuffer; //+1;
result = RESULT_OK; // ????
m_PtrSnapshot = i; // 保存快照.
}
else
{
//Log.i("StreamUnpacker","Sum failed...");
}
}
}
else // 长度不够,需要拼接.
{
result = RESULT_NO_ENOUGH_LENGTH; // ????
m_PtrSnapshot = i; // 保存快照.
break;
}
}
}
// Clean up.
CleanUp(result);
}