Pastebin

namespace net {

std::string Packet_Processor::Interleave(const std::string &original) const
{
	std::string processed(original);
	int i = 0;
	int ii = 0;

	for (; i < int(original.size()); i += 2)
		processed[i] = original[ii++];

	--i;

	if (original.size() % 2 != 0)
		i -= 2;

	for (; i >= 0; i -= 2)
		processed[i] = original[ii++];

	return processed;
}

std::string Packet_Processor::Deinterleave(const std::string &original) const
{
	std::string processed(original);
	int i = 0;
	int ii = 0;

	for (; i < int(original.size()); i += 2)
		processed[ii++] = original[i];

	--i;

	if (original.size() % 2 != 0)
		i -= 2;

	for (; i >= 0; i -= 2)
		processed[ii++] = original[i];

	return processed;
}

std::string Packet_Processor::FlipMSB(const std::string &original) const
{
	std::string processed(original);

	for (std::size_t i = 0; i < processed.size(); ++i)
	{
		processed[i] = processed[i] ^ 0x80;
	}

	return processed;
}

std::string Packet_Processor::SwapMultiples(const std::string &original, uint8_t multi) const
{
	std::string processed(original);
	int sequence_length = 0;

	if (multi == 0)
		return processed;

	for (int i = 0; i <= int(processed.size()); ++i)
	{
		if (i != int(processed.size()) && ((unsigned char)processed[i]) % multi == 0)
		{
			++sequence_length;
		}
		else
		{
			if (sequence_length > 1)
			{
				//printf("do wind: %i\n", sequence_length);
				std::reverse(processed.begin() + i - sequence_length, processed.begin() + i);
			}

			sequence_length = 0;
		}
	}

	/*if (processed != original)
	{
		printf("WINDERATED: %i\n", multi);
		printf("ORIG ");
		for (auto it = original.begin(); it != original.end(); ++it)
		{
			printf("%i ", (unsigned char)*it);
		}
		puts("");

		printf("PROC ");
		for (auto it = processed.begin(); it != processed.end(); ++it)
		{
			printf("%i ", (unsigned char)*it);
		}
		puts("");
	}*/

	return processed;
}

} // namespace net