Method ParseMetadata

Tools/ProtoProxy/Connection.cpp:2690–2761

bool cConnection::ParseMetadata(cByteBuffer & a_Buffer, AString & a_Metadata)
{
	char x;
	if (!a_Buffer.ReadChar(x))
	{
		return false;
	}
	a_Metadata.push_back(x);
	while (x != 0x7f)
	{
		// int Index = ((unsigned)((unsigned char)x)) & 0x1f;  // Lower 5 bits = index
		int Type  = ((unsigned)((unsigned char)x)) >> 5;    // Upper 3 bits = type
		int Length = 0;
		switch (Type)
		{
			case 0: Length = 1; break;  // Byte
			case 1: Length = 2; break;  // short
			case 2: Length = 4; break;  // int
			case 3: Length = 4; break;  // float
			case 4:  // UTF-8 string with VarInt length
			{
				UInt32 Len;
				int rs = a_Buffer.GetReadableSpace();
				if (!a_Buffer.ReadVarInt(Len))
				{
					return false;
				}
				rs = rs - a_Buffer.GetReadableSpace();
				cByteBuffer LenBuf(8);
				LenBuf.WriteVarInt(Len);
				AString VarLen;
				LenBuf.ReadAll(VarLen);
				a_Metadata.append(VarLen);
				Length = Len;
				break;
			}
			case 5:
			{
				int Before = a_Buffer.GetReadableSpace();
				AString ItemDesc;
				if (!ParseSlot(a_Buffer, ItemDesc))
				{
					return false;
				}
				int After = a_Buffer.GetReadableSpace();
				a_Buffer.ResetRead();
				a_Buffer.SkipRead(a_Buffer.GetReadableSpace() - Before);
				Length = Before - After;
				break;
			}
			case 6: Length = 12; break;  // 3 * int
			case 7:
			default:
			{
				ASSERT(!"Unknown metadata type");
				break;
			}
		}  // switch (Type)