gistfile1.cpp

P = send_reliable.begin();
while (!send_reliable.empty()) {
    unsigned int fragc = fragment_count(writer.write_amount(), P->packet.size());
	unsigned int start = 0;
	for (unsigned int i = 0; i < fragc - 1; i++) {
		start += add_packet(writer, P->chan, P->packet, start, fragc);
		send_packet(writer);
	}
	add_packet(writer, P->chan, P->packet, start, fragc);
	send_reliable.erase(P);

	auto pos = writer.write_amount();
	while (can_fit_any(pos)) {
		auto it = std::find_if(send_reliable.begin(), send_reliable.end(),
			[=](const SendPacket& p) {
				return fragment_count(pos, p.packet.size()) == 1;
		});
		if (it != send_reliable.end()) {
			add_packet(writer, it->chan, it->packet, 0, 1);
			send_reliable.erase(it);
		} else {
			break;
		}
		pos = writer.write_amount();
	}

	if (can_fit_any(pos)) {
		auto it = std::find_if(send_reliable.begin(), send_reliable.end(),
			[=](const SendPacket& p) {
				return fragment_count(pos, p.packet.size()) < fragment_count(0, p.packet.size());
		});
		if (it != send_reliable.end()) {
			P = it;
			continue;
		}
	}

	send_packet(writer);
	P = send_reliable.begin();
}