steamid.hpp

/*
 * Copyright (c) 2006-2014 A.W. Stanley
 * Released into the public domain as of
 * http://awsta.nley.org/post/88514503005/c-steamid-conversion
 *
 * An assumption is made about "normal" string inputs.
 * Note: 76561197960265728 = 0000 0001 0001 0000 0000 0000 0000 0001
 * Universe: (0000 0001)
 * Account Type: (0001)
 * Instance: (0000 0000 0000 0001)
 *
 * The original code only contained STEAM_A:B:C conversion to universe,
 * made no note of assumptions, and did not do the reverse conversion.
 *
 * Changelog (by year):
 * - Jul 2014
 *     Cleaned up code for release.
 *     Updated names for cleanliness.
 *
 * - Aug 2010
 *     Added bitmask (removing ugly bit manipulation)
 *
 * - Nov 2007
 *     New Steam account created.
 *     Realised it was 64 bit divided into 32 bit + 32 bit 
 *     (fixing original mistake based on common SteamID from friends)
 *
 * - Nov 2006
 *     Initial common bits noticed and initial (horrible) code written.
 * 
 */
 
#pragma once
#include <stdio.h>
#include <string>

namespace Steam
{
	struct _SteamID32_Info {
		unsigned int instance : 20;
		unsigned int type : 4;
		unsigned int universe : 8;
	};

	struct _SteamID32 {
		unsigned int AccountID;
		_SteamID32_Info Info;
	};

	union SteamID {
		unsigned long long SteamID64;
		_SteamID32 SteamID32;
	};

	struct SteamInfo
	{
		SteamID id;
		std::string id_string;

		void init(unsigned long long i)
		{
			id.SteamID64 = i;
			char s[64];
			int sid = id.SteamID32.AccountID % 2;
			sprintf(s, "STEAM_0:%i:%i", sid, (id.SteamID32.AccountID-sid)/2);
			id_string = s;
		}
		
		// You should use this
		SteamInfo(unsigned long long id)
		{
			init(id);
		}

		// Or this and then subsequently init(id)
		SteamInfo() {}

		// Assumes the account is a normal public instance
		SteamInfo(std::string i)
		{
			int sid, uni, ser;
			sscanf(i.c_str(), "STEAM_%i:%i:%i",uni,ser,sid);
			init((sid * 2) + 76561197960265728 + ser);
		}
	};
}