]> git.lizzy.rs Git - minetest.git/blobdiff - src/main.cpp
Deduplicate code and use stdlib in string functions
[minetest.git] / src / main.cpp
index 7a6b3e47cc3745f13504e130366a3cfb0a5fcbe2..cc89d32ac64fc52e84f1880802e230230c35f8c3 100644 (file)
@@ -69,9 +69,6 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "profiler.h"
 #include "log.h"
 #include "mods.h"
-#if USE_FREETYPE
-#include "xCGUITTFont.h"
-#endif
 #include "util/string.h"
 #include "subgame.h"
 #include "quicktune.h"
@@ -80,6 +77,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "guiEngine.h"
 #include "mapsector.h"
 #include "player.h"
+#include "fontengine.h"
 
 #include "database-sqlite3.h"
 #ifdef USE_LEVELDB
@@ -93,11 +91,12 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #ifdef HAVE_TOUCHSCREENGUI
 #include "touchscreengui.h"
 #endif
+
 /*
        Settings.
        These are loaded from the config file.
 */
-Settings main_settings;
+static Settings main_settings;
 Settings *g_settings = &main_settings;
 std::string g_settings_path;
 
@@ -125,6 +124,66 @@ std::ostream *derr_server_ptr = &errorstream;
 std::ostream *dout_client_ptr = &infostream;
 std::ostream *derr_client_ptr = &errorstream;
 
+#define DEBUGFILE "debug.txt"
+#define DEFAULT_SERVER_PORT 30000
+
+typedef std::map<std::string, ValueSpec> OptionList;
+
+struct GameParams {
+       u16 socket_port;
+       std::string world_path;
+       SubgameSpec game_spec;
+       bool is_dedicated_server;
+       int log_level;
+};
+
+/**********************************************************************
+ * Private functions
+ **********************************************************************/
+
+static bool get_cmdline_opts(int argc, char *argv[], Settings *cmd_args);
+static void set_allowed_options(OptionList *allowed_options);
+
+static void print_help(const OptionList &allowed_options);
+static void print_allowed_options(const OptionList &allowed_options);
+static void print_version();
+static void print_worldspecs(const std::vector<WorldSpec> &worldspecs,
+                                                        std::ostream &os);
+static void print_modified_quicktune_values();
+
+static void list_game_ids();
+static void list_worlds();
+static void setup_log_params(const Settings &cmd_args);
+static bool create_userdata_path();
+static bool init_common(int *log_level, const Settings &cmd_args, int argc, char *argv[]);
+static void startup_message();
+static bool read_config_file(const Settings &cmd_args);
+static void init_debug_streams(int *log_level, const Settings &cmd_args);
+
+static bool game_configure(GameParams *game_params, const Settings &cmd_args);
+static void game_configure_port(GameParams *game_params, const Settings &cmd_args);
+
+static bool game_configure_world(GameParams *game_params, const Settings &cmd_args);
+static bool get_world_from_cmdline(GameParams *game_params, const Settings &cmd_args);
+static bool get_world_from_config(GameParams *game_params, const Settings &cmd_args);
+static bool auto_select_world(GameParams *game_params);
+static std::string get_clean_world_path(const std::string &path);
+
+static bool game_configure_subgame(GameParams *game_params, const Settings &cmd_args);
+static bool get_game_from_cmdline(GameParams *game_params, const Settings &cmd_args);
+static bool determine_subgame(GameParams *game_params);
+
+static bool run_dedicated_server(const GameParams &game_params, const Settings &cmd_args);
+static bool migrate_database(const GameParams &game_params, const Settings &cmd_args,
+               Server *server);
+
+#ifndef SERVER
+static bool print_video_modes();
+static void speed_tests();
+#endif
+
+/**********************************************************************/
+
 #ifndef SERVER
 /*
        Random stuff
@@ -285,7 +344,7 @@ class MyEventReceiver : public IEventReceiver
                }
 #endif
                // handle mouse events
-               if(event.EventType == irr::EET_MOUSE_INPUT_EVENT) {
+               if (event.EventType == irr::EET_MOUSE_INPUT_EVENT) {
                        if (noMenuActive() == false) {
                                left_active = false;
                                middle_active = false;
@@ -312,8 +371,9 @@ class MyEventReceiver : public IEventReceiver
                                }
                        }
                }
-               if(event.EventType == irr::EET_LOG_TEXT_EVENT) {
-                       dstream<< std::string("Irrlicht log: ") + std::string(event.LogEvent.Text)<<std::endl;
+               if (event.EventType == irr::EET_LOG_TEXT_EVENT) {
+                       dstream << std::string("Irrlicht log: ") + std::string(event.LogEvent.Text)
+                               << std::endl;
                        return true;
                }
                /* always return false in order to continue processing events */
@@ -649,229 +709,338 @@ class RandomInputHandler : public InputHandler
        bool rightreleased;
 };
 
+
+class ClientLauncher
+{
+public:
+       ClientLauncher() :
+               list_video_modes(false),
+               skip_main_menu(false),
+               use_freetype(false),
+               random_input(false),
+               address(""),
+               playername(""),
+               password(""),
+               device(NULL),
+               input(NULL),
+               receiver(NULL),
+               skin(NULL),
+               font(NULL),
+               simple_singleplayer_mode(false),
+               current_playername("invĀ£lid"),
+               current_password(""),
+               current_address("does-not-exist"),
+               current_port(0)
+       {}
+
+       ~ClientLauncher();
+
+       bool run(GameParams &game_params, const Settings &cmd_args);
+
+protected:
+       void init_args(GameParams &game_params, const Settings &cmd_args);
+       bool init_engine(int log_level);
+
+       bool launch_game(std::wstring *error_message, GameParams &game_params,
+                       const Settings &cmd_args);
+
+       void main_menu(MainMenuData *menudata);
+       bool create_engine_device(int log_level);
+
+       bool list_video_modes;
+       bool skip_main_menu;
+       bool use_freetype;
+       bool random_input;
+       std::string address;
+       std::string playername;
+       std::string password;
+       IrrlichtDevice *device;
+       InputHandler *input;
+       MyEventReceiver *receiver;
+       gui::IGUISkin *skin;
+       gui::IGUIFont *font;
+       scene::ISceneManager *smgr;
+       SubgameSpec gamespec;
+       WorldSpec worldspec;
+       bool simple_singleplayer_mode;
+
+       // These are set up based on the menu and other things
+       // TODO: Are these required since there's already playername, password, etc
+       std::string current_playername;
+       std::string current_password;
+       std::string current_address;
+       int current_port;
+};
+
 #endif // !SERVER
 
-// These are defined global so that they're not optimized too much.
-// Can't change them to volatile.
-s16 temp16;
-f32 tempf;
-v3f tempv3f1;
-v3f tempv3f2;
-std::string tempstring;
-std::string tempstring2;
+static OptionList allowed_options;
 
-void SpeedTests()
+int main(int argc, char *argv[])
 {
-       {
-               infostream << "The following test should take around 20ms." << std::endl;
-               TimeTaker timer("Testing std::string speed");
-               const u32 jj = 10000;
-               for(u32 j = 0; j < jj; j++) {
-                       tempstring = "";
-                       tempstring2 = "";
-                       const u32 ii = 10;
-                       for(u32 i = 0; i < ii; i++) {
-                               tempstring2 += "asd";
-                       }
-                       for(u32 i = 0; i < ii+1; i++) {
-                               tempstring += "asd";
-                               if (tempstring == tempstring2)
-                                       break;
-                       }
-               }
-       }
+       int retval;
 
-       infostream << "All of the following tests should take around 100ms each."
-               << std::endl;
+       log_add_output_maxlev(&main_stderr_log_out, LMT_ACTION);
+       log_add_output_all_levs(&main_dstream_no_stderr_log_out);
 
-       {
-               TimeTaker timer("Testing floating-point conversion speed");
-               tempf = 0.001;
-               for(u32 i = 0; i < 4000000; i++) {
-                       temp16 += tempf;
-                       tempf += 0.001;
-               }
-       }
+       log_register_thread("main");
 
-       {
-               TimeTaker timer("Testing floating-point vector speed");
+       Settings cmd_args;
+       bool cmd_args_ok = get_cmdline_opts(argc, argv, &cmd_args);
+       if (!cmd_args_ok
+                       || cmd_args.getFlag("help")
+                       || cmd_args.exists("nonopt1")) {
+               print_help(allowed_options);
+               return cmd_args_ok ? 0 : 1;
+       }
 
-               tempv3f1 = v3f(1, 2, 3);
-               tempv3f2 = v3f(4, 5, 6);
-               for(u32 i = 0; i < 10000000; i++) {
-                       tempf += tempv3f1.dotProduct(tempv3f2);
-                       tempv3f2 += v3f(7, 8, 9);
-               }
+       if (cmd_args.getFlag("version")) {
+               print_version();
+               return 0;
        }
 
-       {
-               TimeTaker timer("Testing std::map speed");
+       setup_log_params(cmd_args);
 
-               std::map<v2s16, f32> map1;
-               tempf = -324;
-               const s16 ii = 300;
-               for(s16 y = 0; y < ii; y++) {
-                       for(s16 x = 0; x < ii; x++) {
-                               map1[v2s16(x, y)] =  tempf;
-                               tempf += 1;
-                       }
-               }
-               for(s16 y = ii - 1; y >= 0; y--) {
-                       for(s16 x = 0; x < ii; x++) {
-                               tempf = map1[v2s16(x, y)];
-                       }
-               }
+       porting::signal_handler_init();
+       porting::initializePaths();
+
+       if (!create_userdata_path()) {
+               errorstream << "Cannot create user data directory" << std::endl;
+               return 1;
        }
 
-       {
-               infostream << "Around 5000/ms should do well here." << std::endl;
-               TimeTaker timer("Testing mutex speed");
+       // Initialize debug stacks
+       debug_stacks_init();
+       DSTACK(__FUNCTION_NAME);
 
-               JMutex m;
-               u32 n = 0;
-               u32 i = 0;
-               do {
-                       n += 10000;
-                       for(; i < n; i++) {
-                               m.Lock();
-                               m.Unlock();
-                       }
-               }
-               // Do at least 10ms
-               while(timer.getTimerTime() < 10);
+       // Debug handler
+       BEGIN_DEBUG_EXCEPTION_HANDLER
 
-               u32 dtime = timer.stop();
-               u32 per_ms = n / dtime;
-               infostream << "Done. " << dtime << "ms, " << per_ms << "/ms" << std::endl;
+       // List gameids if requested
+       if (cmd_args.exists("gameid") && cmd_args.get("gameid") == "list") {
+               list_game_ids();
+               return 0;
        }
-}
 
-static void print_worldspecs(const std::vector<WorldSpec> &worldspecs, std::ostream &os)
-{
-       for(u32 i = 0; i < worldspecs.size(); i++) {
-               std::string name = worldspecs[i].name;
-               std::string path = worldspecs[i].path;
-               if (name.find(" ") != std::string::npos)
-                       name = std::string("'") + name + "'";
-               path = std::string("'") + path + "'";
-               name = padStringRight(name, 14);
-               os << "  " << name << " " << path << std::endl;
+       // List worlds if requested
+       if (cmd_args.exists("world") && cmd_args.get("world") == "list") {
+               list_worlds();
+               return 0;
+       }
+
+       GameParams game_params;
+       if (!init_common(&game_params.log_level, cmd_args, argc, argv))
+               return 1;
+
+#ifndef __ANDROID__
+       // Run unit tests
+       if ((ENABLE_TESTS && cmd_args.getFlag("disable-unittests") == false)
+                       || cmd_args.getFlag("enable-unittests") == true) {
+               run_tests();
        }
+#endif
+
+#ifdef SERVER
+       game_params.is_dedicated_server = true;
+#else
+       game_params.is_dedicated_server = cmd_args.getFlag("server");
+#endif
+
+       if (!game_configure(&game_params, cmd_args))
+               return 1;
+
+       assert(game_params.world_path != "");
+
+       infostream << "Using commanded world path ["
+                  << game_params.world_path << "]" << std::endl;
+
+       //Run dedicated server if asked to or no other option
+       g_settings->set("server_dedicated",
+                       game_params.is_dedicated_server ? "true" : "false");
+
+       if (game_params.is_dedicated_server)
+               return run_dedicated_server(game_params, cmd_args) ? 0 : 1;
+
+#ifndef SERVER
+       ClientLauncher launcher;
+       retval = launcher.run(game_params, cmd_args) ? 0 : 1;
+#else
+       retval = 0;
+#endif
+
+       // Update configuration file
+       if (g_settings_path != "")
+               g_settings->updateConfigFile(g_settings_path.c_str());
+
+       print_modified_quicktune_values();
+
+       // Stop httpfetch thread (if started)
+       httpfetch_cleanup();
+
+       END_DEBUG_EXCEPTION_HANDLER(errorstream)
+
+       return retval;
 }
 
-int main(int argc, char *argv[])
-{
-       int retval = 0;
 
-       /*
-               Initialization
      */
+/*****************************************************************************
+ * Startup / Init
*****************************************************************************/
 
-       log_add_output_maxlev(&main_stderr_log_out, LMT_ACTION);
-       log_add_output_all_levs(&main_dstream_no_stderr_log_out);
 
-       log_register_thread("main");
-       /*
-               Parse command line
-       */
+static bool get_cmdline_opts(int argc, char *argv[], Settings *cmd_args)
+{
+       set_allowed_options(&allowed_options);
+
+       return cmd_args->parseCommandLine(argc, argv, allowed_options);
+}
 
-       // List all allowed options
-       std::map<std::string, ValueSpec> allowed_options;
-       allowed_options.insert(std::make_pair("help", ValueSpec(VALUETYPE_FLAG,
+static void set_allowed_options(OptionList *allowed_options)
+{
+       allowed_options->clear();
+
+       allowed_options->insert(std::make_pair("help", ValueSpec(VALUETYPE_FLAG,
                        _("Show allowed options"))));
-       allowed_options.insert(std::make_pair("version", ValueSpec(VALUETYPE_FLAG,
+       allowed_options->insert(std::make_pair("version", ValueSpec(VALUETYPE_FLAG,
                        _("Show version information"))));
-       allowed_options.insert(std::make_pair("config", ValueSpec(VALUETYPE_STRING,
+       allowed_options->insert(std::make_pair("config", ValueSpec(VALUETYPE_STRING,
                        _("Load configuration from specified file"))));
-       allowed_options.insert(std::make_pair("port", ValueSpec(VALUETYPE_STRING,
+       allowed_options->insert(std::make_pair("port", ValueSpec(VALUETYPE_STRING,
                        _("Set network port (UDP)"))));
-       allowed_options.insert(std::make_pair("disable-unittests", ValueSpec(VALUETYPE_FLAG,
+       allowed_options->insert(std::make_pair("disable-unittests", ValueSpec(VALUETYPE_FLAG,
                        _("Disable unit tests"))));
-       allowed_options.insert(std::make_pair("enable-unittests", ValueSpec(VALUETYPE_FLAG,
+       allowed_options->insert(std::make_pair("enable-unittests", ValueSpec(VALUETYPE_FLAG,
                        _("Enable unit tests"))));
-       allowed_options.insert(std::make_pair("map-dir", ValueSpec(VALUETYPE_STRING,
+       allowed_options->insert(std::make_pair("map-dir", ValueSpec(VALUETYPE_STRING,
                        _("Same as --world (deprecated)"))));
-       allowed_options.insert(std::make_pair("world", ValueSpec(VALUETYPE_STRING,
+       allowed_options->insert(std::make_pair("world", ValueSpec(VALUETYPE_STRING,
                        _("Set world path (implies local game) ('list' lists all)"))));
-       allowed_options.insert(std::make_pair("worldname", ValueSpec(VALUETYPE_STRING,
+       allowed_options->insert(std::make_pair("worldname", ValueSpec(VALUETYPE_STRING,
                        _("Set world by name (implies local game)"))));
-       allowed_options.insert(std::make_pair("quiet", ValueSpec(VALUETYPE_FLAG,
+       allowed_options->insert(std::make_pair("quiet", ValueSpec(VALUETYPE_FLAG,
                        _("Print to console errors only"))));
-       allowed_options.insert(std::make_pair("info", ValueSpec(VALUETYPE_FLAG,
+       allowed_options->insert(std::make_pair("info", ValueSpec(VALUETYPE_FLAG,
                        _("Print more information to console"))));
-       allowed_options.insert(std::make_pair("verbose",  ValueSpec(VALUETYPE_FLAG,
+       allowed_options->insert(std::make_pair("verbose",  ValueSpec(VALUETYPE_FLAG,
                        _("Print even more information to console"))));
-       allowed_options.insert(std::make_pair("trace", ValueSpec(VALUETYPE_FLAG,
+       allowed_options->insert(std::make_pair("trace", ValueSpec(VALUETYPE_FLAG,
                        _("Print enormous amounts of information to log and console"))));
-       allowed_options.insert(std::make_pair("logfile", ValueSpec(VALUETYPE_STRING,
+       allowed_options->insert(std::make_pair("logfile", ValueSpec(VALUETYPE_STRING,
                        _("Set logfile path ('' = no logging)"))));
-       allowed_options.insert(std::make_pair("gameid", ValueSpec(VALUETYPE_STRING,
+       allowed_options->insert(std::make_pair("gameid", ValueSpec(VALUETYPE_STRING,
                        _("Set gameid (\"--gameid list\" prints available ones)"))));
-       allowed_options.insert(std::make_pair("migrate", ValueSpec(VALUETYPE_STRING,
+       allowed_options->insert(std::make_pair("migrate", ValueSpec(VALUETYPE_STRING,
                        _("Migrate from current map backend to another (Only works when using minetestserver or with --server)"))));
 #ifndef SERVER
-       allowed_options.insert(std::make_pair("videomodes", ValueSpec(VALUETYPE_FLAG,
+       allowed_options->insert(std::make_pair("videomodes", ValueSpec(VALUETYPE_FLAG,
                        _("Show available video modes"))));
-       allowed_options.insert(std::make_pair("speedtests", ValueSpec(VALUETYPE_FLAG,
+       allowed_options->insert(std::make_pair("speedtests", ValueSpec(VALUETYPE_FLAG,
                        _("Run speed tests"))));
-       allowed_options.insert(std::make_pair("address", ValueSpec(VALUETYPE_STRING,
+       allowed_options->insert(std::make_pair("address", ValueSpec(VALUETYPE_STRING,
                        _("Address to connect to. ('' = local game)"))));
-       allowed_options.insert(std::make_pair("random-input", ValueSpec(VALUETYPE_FLAG,
+       allowed_options->insert(std::make_pair("random-input", ValueSpec(VALUETYPE_FLAG,
                        _("Enable random user input, for testing"))));
-       allowed_options.insert(std::make_pair("server", ValueSpec(VALUETYPE_FLAG,
+       allowed_options->insert(std::make_pair("server", ValueSpec(VALUETYPE_FLAG,
                        _("Run dedicated server"))));
-       allowed_options.insert(std::make_pair("name", ValueSpec(VALUETYPE_STRING,
+       allowed_options->insert(std::make_pair("name", ValueSpec(VALUETYPE_STRING,
                        _("Set player name"))));
-       allowed_options.insert(std::make_pair("password", ValueSpec(VALUETYPE_STRING,
+       allowed_options->insert(std::make_pair("password", ValueSpec(VALUETYPE_STRING,
                        _("Set password"))));
-       allowed_options.insert(std::make_pair("go", ValueSpec(VALUETYPE_FLAG,
+       allowed_options->insert(std::make_pair("go", ValueSpec(VALUETYPE_FLAG,
                        _("Disable main menu"))));
 #endif
 
-       Settings cmd_args;
+}
 
-       bool ret = cmd_args.parseCommandLine(argc, argv, allowed_options);
-
-       if (ret == false || cmd_args.getFlag("help") || cmd_args.exists("nonopt1")) {
-               dstream << _("Allowed options:") << std::endl;
-               for(std::map<std::string, ValueSpec>::iterator
-                               i = allowed_options.begin();
-                               i != allowed_options.end(); ++i) {
-                       std::ostringstream os1(std::ios::binary);
-                       os1 << "  --"<<i->first;
-                       if (i->second.type == VALUETYPE_FLAG) {
-                       } else
-                               os1 << _(" <value>");
-                       dstream << padStringRight(os1.str(), 24);
-
-                       if (i->second.help != NULL)
-                               dstream << i->second.help;
-                       dstream << std::endl;
-               }
+static void print_help(const OptionList &allowed_options)
+{
+       dstream << _("Allowed options:") << std::endl;
+       print_allowed_options(allowed_options);
+}
+
+static void print_allowed_options(const OptionList &allowed_options)
+{
+       for (OptionList::const_iterator i = allowed_options.begin();
+                       i != allowed_options.end(); ++i) {
+               std::ostringstream os1(std::ios::binary);
+               os1 << "  --" << i->first;
+               if (i->second.type != VALUETYPE_FLAG)
+                       os1 << _(" <value>");
+
+               dstream << padStringRight(os1.str(), 24);
 
-               return cmd_args.getFlag("help") ? 0 : 1;
+               if (i->second.help != NULL)
+                       dstream << i->second.help;
+
+               dstream << std::endl;
        }
+}
 
-       if (cmd_args.getFlag("version")) {
+static void print_version()
+{
 #ifdef SERVER
-               dstream << "minetestserver " << minetest_version_hash << std::endl;
+       dstream << "minetestserver " << minetest_version_hash << std::endl;
 #else
-               dstream << "Minetest " << minetest_version_hash << std::endl;
-               dstream << "Using Irrlicht " << IRRLICHT_SDK_VERSION << std::endl;
+       dstream << "Minetest " << minetest_version_hash << std::endl;
+       dstream << "Using Irrlicht " << IRRLICHT_SDK_VERSION << std::endl;
 #endif
-               dstream << "Build info: " << minetest_build_info << std::endl;
-               return 0;
+       dstream << "Build info: " << minetest_build_info << std::endl;
+}
+
+static void list_game_ids()
+{
+       std::set<std::string> gameids = getAvailableGameIds();
+       for (std::set<std::string>::const_iterator i = gameids.begin();
+                       i != gameids.end(); i++)
+               dstream << (*i) <<std::endl;
+}
+
+static void list_worlds()
+{
+       dstream << _("Available worlds:") << std::endl;
+       std::vector<WorldSpec> worldspecs = getAvailableWorlds();
+       print_worldspecs(worldspecs, dstream);
+}
+
+static void print_worldspecs(const std::vector<WorldSpec> &worldspecs,
+                                                        std::ostream &os)
+{
+       for (size_t i = 0; i < worldspecs.size(); i++) {
+               std::string name = worldspecs[i].name;
+               std::string path = worldspecs[i].path;
+               if (name.find(" ") != std::string::npos)
+                       name = std::string("'") + name + "'";
+               path = std::string("'") + path + "'";
+               name = padStringRight(name, 14);
+               os << "  " << name << " " << path << std::endl;
        }
+}
 
-       /*
-               Low-level initialization
-       */
+static void print_modified_quicktune_values()
+{
+       bool header_printed = false;
+       std::vector<std::string> names = getQuicktuneNames();
+
+       for (u32 i = 0; i < names.size(); i++) {
+               QuicktuneValue val = getQuicktuneValue(names[i]);
+               if (!val.modified)
+                       continue;
+               if (!header_printed) {
+                       dstream << "Modified quicktune values:" << std::endl;
+                       header_printed = true;
+               }
+               dstream << names[i] << " = " << val.getString() << std::endl;
+       }
+}
 
+static void setup_log_params(const Settings &cmd_args)
+{
        // Quiet mode, print errors only
        if (cmd_args.getFlag("quiet")) {
                log_remove_output(&main_stderr_log_out);
                log_add_output_maxlev(&main_stderr_log_out, LMT_ERROR);
        }
+
        // If trace is enabled, enable logging of certain things
        if (cmd_args.getFlag("trace")) {
                dstream << _("Enabling trace level debug output") << std::endl;
@@ -879,96 +1048,102 @@ int main(int argc, char *argv[])
                dout_con_ptr = &verbosestream; // this is somewhat old crap
                socket_enable_debug_output = true; // socket doesn't use log.h
        }
+
        // In certain cases, output info level on stderr
        if (cmd_args.getFlag("info") || cmd_args.getFlag("verbose") ||
                        cmd_args.getFlag("trace") || cmd_args.getFlag("speedtests"))
                log_add_output(&main_stderr_log_out, LMT_INFO);
+
        // In certain cases, output verbose level on stderr
        if (cmd_args.getFlag("verbose") || cmd_args.getFlag("trace"))
                log_add_output(&main_stderr_log_out, LMT_VERBOSE);
+}
 
-       porting::signal_handler_init();
-       bool &kill = *porting::signal_handler_killstatus();
-
-       porting::initializePaths();
+static bool create_userdata_path()
+{
+       bool success;
 
 #ifdef __ANDROID__
        porting::initAndroid();
 
        porting::setExternalStorageDir(porting::jnienv);
        if (!fs::PathExists(porting::path_user)) {
-               fs::CreateDir(porting::path_user);
+               success = fs::CreateDir(porting::path_user);
+       } else {
+               success = true;
        }
        porting::copyAssets();
 #else
        // Create user data directory
-       fs::CreateDir(porting::path_user);
+       success = fs::CreateDir(porting::path_user);
 #endif
 
        infostream << "path_share = " << porting::path_share << std::endl;
        infostream << "path_user  = " << porting::path_user << std::endl;
 
-       // Initialize debug stacks
-       debug_stacks_init();
-       DSTACK(__FUNCTION_NAME);
+       return success;
+}
 
-       // Debug handler
-       BEGIN_DEBUG_EXCEPTION_HANDLER
+static bool init_common(int *log_level, const Settings &cmd_args, int argc, char *argv[])
+{
+       startup_message();
+       set_default_settings(g_settings);
 
-       // List gameids if requested
-       if (cmd_args.exists("gameid") && cmd_args.get("gameid") == "list") {
-               std::set<std::string> gameids = getAvailableGameIds();
-               for(std::set<std::string>::const_iterator i = gameids.begin();
-                               i != gameids.end(); i++)
-                       dstream<<(*i)<<std::endl;
-               return 0;
-       }
+       // Initialize sockets
+       sockets_init();
+       atexit(sockets_cleanup);
 
-       // List worlds if requested
-       if (cmd_args.exists("world") && cmd_args.get("world") == "list") {
-               dstream << _("Available worlds:") << std::endl;
-               std::vector<WorldSpec> worldspecs = getAvailableWorlds();
-               print_worldspecs(worldspecs, dstream);
-               return 0;
-       }
+       if (!read_config_file(cmd_args))
+               return false;
 
-       // Print startup message
-       infostream<<PROJECT_NAME <<     " "<< _("with") << " SER_FMT_VER_HIGHEST_READ="
-               << (int)SER_FMT_VER_HIGHEST_READ << ", " << minetest_build_info << std::endl;
+       init_debug_streams(log_level, cmd_args);
 
-       /*
-               Basic initialization
-       */
+       // Initialize random seed
+       srand(time(0));
+       mysrand(time(0));
 
-       // Initialize default settings
-       set_default_settings(g_settings);
+       // Initialize HTTP fetcher
+       httpfetch_init(g_settings->getS32("curl_parallel_limit"));
 
-       // Initialize sockets
-       sockets_init();
-       atexit(sockets_cleanup);
+#ifdef _MSC_VER
+       init_gettext((porting::path_share + DIR_DELIM + "locale").c_str(),
+               g_settings->get("language"), argc, argv);
+#else
+       init_gettext((porting::path_share + DIR_DELIM + "locale").c_str(),
+               g_settings->get("language"));
+#endif
 
-       /*
-               Read config file
-       */
+       return true;
+}
 
+static void startup_message()
+{
+       infostream << PROJECT_NAME << " " << _("with")
+                  << " SER_FMT_VER_HIGHEST_READ="
+               << (int)SER_FMT_VER_HIGHEST_READ << ", "
+               << minetest_build_info << std::endl;
+}
+
+static bool read_config_file(const Settings &cmd_args)
+{
        // Path of configuration file in use
-       g_settings_path = "";
+       assert(g_settings_path == "");  // Sanity check
 
        if (cmd_args.exists("config")) {
                bool r = g_settings->readConfigFile(cmd_args.get("config").c_str());
-               if (r == false) {
+               if (!r) {
                        errorstream << "Could not read configuration from \""
-                                       << cmd_args.get("config") << "\"" << std::endl;
-                       return 1;
+                                   << cmd_args.get("config") << "\"" << std::endl;
+                       return false;
                }
                g_settings_path = cmd_args.get("config");
        } else {
                std::vector<std::string> filenames;
-               filenames.push_back(porting::path_user +
-                               DIR_DELIM + "minetest.conf");
+               filenames.push_back(porting::path_user + DIR_DELIM + "minetest.conf");
                // Legacy configuration file location
                filenames.push_back(porting::path_user +
                                DIR_DELIM + ".." + DIR_DELIM + "minetest.conf");
+
 #if RUN_IN_PLACE
                // Try also from a lower level (to aid having the same configuration
                // for many RUN_IN_PLACE installs)
@@ -976,7 +1151,7 @@ int main(int argc, char *argv[])
                                DIR_DELIM + ".." + DIR_DELIM + ".." + DIR_DELIM + "minetest.conf");
 #endif
 
-               for(u32 i = 0; i < filenames.size(); i++) {
+               for (size_t i = 0; i < filenames.size(); i++) {
                        bool r = g_settings->readConfigFile(filenames[i].c_str());
                        if (r) {
                                g_settings_path = filenames[i];
@@ -989,613 +1164,497 @@ int main(int argc, char *argv[])
                        g_settings_path = filenames[0];
        }
 
-       // Initialize debug streams
-#define DEBUGFILE "debug.txt"
+       return true;
+}
+
+static void init_debug_streams(int *log_level, const Settings &cmd_args)
+{
 #if RUN_IN_PLACE
        std::string logfile = DEBUGFILE;
 #else
-       std::string logfile = porting::path_user+DIR_DELIM+DEBUGFILE;
+       std::string logfile = porting::path_user + DIR_DELIM + DEBUGFILE;
 #endif
        if (cmd_args.exists("logfile"))
                logfile = cmd_args.get("logfile");
 
        log_remove_output(&main_dstream_no_stderr_log_out);
-       int loglevel = g_settings->getS32("debug_log_level");
+       *log_level = g_settings->getS32("debug_log_level");
 
-       if (loglevel == 0) //no logging
+       if (*log_level == 0) //no logging
                logfile = "";
-       else if (loglevel > 0 && loglevel <= LMT_NUM_VALUES)
-               log_add_output_maxlev(&main_dstream_no_stderr_log_out,
-               (LogMessageLevel)(loglevel - 1));
+       if (*log_level < 0) {
+               dstream << "WARNING: Supplied debug_log_level < 0; Using 0" << std::endl;
+               *log_level = 0;
+       } else if (*log_level > LMT_NUM_VALUES) {
+               dstream << "WARNING: Supplied debug_log_level > " << LMT_NUM_VALUES
+                       << "; Using " << LMT_NUM_VALUES << std::endl;
+               *log_level = LMT_NUM_VALUES;
+       }
 
-       if (logfile != "")
-               debugstreams_init(false, logfile.c_str());
-       else
-               debugstreams_init(false, NULL);
+       log_add_output_maxlev(&main_dstream_no_stderr_log_out,
+                       (LogMessageLevel)(*log_level - 1));
+
+       debugstreams_init(false, logfile == "" ? NULL : logfile.c_str());
 
        infostream << "logfile = " << logfile << std::endl;
 
-       // Initialize random seed
-       srand(time(0));
-       mysrand(time(0));
+       atexit(debugstreams_deinit);
+}
 
-       // Initialize HTTP fetcher
-       httpfetch_init(g_settings->getS32("curl_parallel_limit"));
+static bool game_configure(GameParams *game_params, const Settings &cmd_args)
+{
+       game_configure_port(game_params, cmd_args);
 
-#ifndef __ANDROID__
-       /*
-               Run unit tests
-       */
-       if ((ENABLE_TESTS && cmd_args.getFlag("disable-unittests") == false)
-                       || cmd_args.getFlag("enable-unittests") == true) {
-                               run_tests();
+       if (!game_configure_world(game_params, cmd_args)) {
+               errorstream << "No world path specified or found." << std::endl;
+               return false;
        }
-#endif
-#ifdef _MSC_VER
-       init_gettext((porting::path_share + DIR_DELIM + "locale").c_str(),
-               g_settings->get("language"), argc, argv);
-#else
-       init_gettext((porting::path_share + DIR_DELIM + "locale").c_str(),
-               g_settings->get("language"));
-#endif
 
-       /*
-               Game parameters
-       */
+       game_configure_subgame(game_params, cmd_args);
 
-       // Port
-       u16 port = 30000;
+       return true;
+}
+
+static void game_configure_port(GameParams *game_params, const Settings &cmd_args)
+{
        if (cmd_args.exists("port"))
-               port = cmd_args.getU16("port");
-       else if (g_settings->exists("port"))
-               port = g_settings->getU16("port");
-       if (port == 0)
-               port = 30000;
+               game_params->socket_port = cmd_args.getU16("port");
+       else
+               game_params->socket_port = g_settings->getU16("port");
 
-       // World directory
+       if (game_params->socket_port == 0)
+               game_params->socket_port = DEFAULT_SERVER_PORT;
+}
+
+static bool game_configure_world(GameParams *game_params, const Settings &cmd_args)
+{
+       if (get_world_from_cmdline(game_params, cmd_args))
+               return true;
+       if (get_world_from_config(game_params, cmd_args))
+               return true;
+
+       return auto_select_world(game_params);
+}
+
+static bool get_world_from_cmdline(GameParams *game_params, const Settings &cmd_args)
+{
        std::string commanded_world = "";
-       if (cmd_args.exists("world"))
-               commanded_world = cmd_args.get("world");
-       else if (cmd_args.exists("map-dir"))
-               commanded_world = cmd_args.get("map-dir");
-       else if (cmd_args.exists("nonopt0")) // First nameless argument
-               commanded_world = cmd_args.get("nonopt0");
-       else if (g_settings->exists("map-dir"))
-               commanded_world = g_settings->get("map-dir");
 
        // World name
        std::string commanded_worldname = "";
        if (cmd_args.exists("worldname"))
                commanded_worldname = cmd_args.get("worldname");
 
-       // Strip world.mt from commanded_world
-       {
-               std::string worldmt = "world.mt";
-               if (commanded_world.size() > worldmt.size() &&
-                               commanded_world.substr(commanded_world.size() - worldmt.size())
-                               == worldmt) {
-                       dstream << _("Supplied world.mt file - stripping it off.") << std::endl;
-                       commanded_world = commanded_world.substr(0,
-                               commanded_world.size() - worldmt.size());
-               }
-       }
-
        // If a world name was specified, convert it to a path
        if (commanded_worldname != "") {
                // Get information about available worlds
                std::vector<WorldSpec> worldspecs = getAvailableWorlds();
                bool found = false;
-               for(u32 i = 0; i < worldspecs.size(); i++) {
+               for (u32 i = 0; i < worldspecs.size(); i++) {
                        std::string name = worldspecs[i].name;
                        if (name == commanded_worldname) {
-                               if (commanded_world != "") {
-                                       dstream << _("--worldname takes precedence over previously "
-                                                       "selected world.") << std::endl;
-                               }
+                               dstream << _("Using world specified by --worldname on the "
+                                       "command line") << std::endl;
                                commanded_world = worldspecs[i].path;
                                found = true;
                                break;
                        }
                }
                if (!found) {
-                       dstream << _("World") << " '"<<commanded_worldname << _("' not "
-                                       "available. Available worlds:") << std::endl;
+                       dstream << _("World") << " '" << commanded_worldname
+                               << _("' not available. Available worlds:") << std::endl;
                        print_worldspecs(worldspecs, dstream);
-                       return 1;
+                       return false;
                }
+
+               game_params->world_path = get_clean_world_path(commanded_world);
+               return commanded_world != "";
+       }
+
+       if (cmd_args.exists("world"))
+               commanded_world = cmd_args.get("world");
+       else if (cmd_args.exists("map-dir"))
+               commanded_world = cmd_args.get("map-dir");
+       else if (cmd_args.exists("nonopt0")) // First nameless argument
+               commanded_world = cmd_args.get("nonopt0");
+
+       game_params->world_path = get_clean_world_path(commanded_world);
+       return commanded_world != "";
+}
+
+static bool get_world_from_config(GameParams *game_params, const Settings &cmd_args)
+{
+       // World directory
+       std::string commanded_world = "";
+
+       if (g_settings->exists("map-dir"))
+               commanded_world = g_settings->get("map-dir");
+
+       game_params->world_path = get_clean_world_path(commanded_world);
+
+       return commanded_world != "";
+}
+
+static bool auto_select_world(GameParams *game_params)
+{
+       // No world was specified; try to select it automatically
+       // Get information about available worlds
+
+       verbosestream << _("Determining world path") << std::endl;
+
+       std::vector<WorldSpec> worldspecs = getAvailableWorlds();
+       std::string world_path;
+
+       // If there is only a single world, use it
+       if (worldspecs.size() == 1) {
+               world_path = worldspecs[0].path;
+               dstream <<_("Automatically selecting world at") << " ["
+                       << world_path << "]" << std::endl;
+       // If there are multiple worlds, list them
+       } else if (worldspecs.size() > 1 && game_params->is_dedicated_server) {
+               dstream << _("Multiple worlds are available.") << std::endl;
+               dstream << _("Please select one using --worldname <name>"
+                               " or --world <path>") << std::endl;
+               print_worldspecs(worldspecs, dstream);
+               return false;
+       // If there are no worlds, automatically create a new one
+       } else {
+               // This is the ultimate default world path
+               world_path = porting::path_user + DIR_DELIM + "worlds" +
+                               DIR_DELIM + "world";
+               infostream << "Creating default world at ["
+                          << world_path << "]" << std::endl;
+       }
+
+       assert(world_path != "");
+       game_params->world_path = world_path;
+       return true;
+}
+
+static std::string get_clean_world_path(const std::string &path)
+{
+       const std::string worldmt = "world.mt";
+       std::string clean_path;
+
+       if (path.size() > worldmt.size()
+                       && path.substr(path.size() - worldmt.size()) == worldmt) {
+               dstream << _("Supplied world.mt file - stripping it off.") << std::endl;
+               clean_path = path.substr(0, path.size() - worldmt.size());
+       } else {
+               clean_path = path;
        }
+       return path;
+}
+
+
+static bool game_configure_subgame(GameParams *game_params, const Settings &cmd_args)
+{
+       bool success;
 
-       // Gamespec
+       success = get_game_from_cmdline(game_params, cmd_args);
+       if (!success)
+               success = determine_subgame(game_params);
+
+       return success;
+}
+
+static bool get_game_from_cmdline(GameParams *game_params, const Settings &cmd_args)
+{
        SubgameSpec commanded_gamespec;
+
        if (cmd_args.exists("gameid")) {
                std::string gameid = cmd_args.get("gameid");
                commanded_gamespec = findSubgame(gameid);
                if (!commanded_gamespec.isValid()) {
                        errorstream << "Game \"" << gameid << "\" not found" << std::endl;
-                       return 1;
+                       return false;
                }
+               dstream << _("Using game specified by --gameid on the command line")
+                       << std::endl;
+               game_params->game_spec = commanded_gamespec;
+               return true;
        }
 
+       return false;
+}
 
-       /*
-               Run dedicated server if asked to or no other option
-       */
-#ifdef SERVER
-       bool run_dedicated_server = true;
-#else
-       bool run_dedicated_server = cmd_args.getFlag("server");
-#endif
-       g_settings->set("server_dedicated", run_dedicated_server ? "true" : "false");
-       if (run_dedicated_server)
-       {
-               DSTACK("Dedicated server branch");
-               // Create time getter if built with Irrlicht
-#ifndef SERVER
-               g_timegetter = new SimpleTimeGetter();
-#endif
-
-               // World directory
-               std::string world_path;
-               verbosestream << _("Determining world path") << std::endl;
-               bool is_legacy_world = false;
-               // If a world was commanded, use it
-               if (commanded_world != "") {
-                       world_path = commanded_world;
-                       infostream << "Using commanded world path [" << world_path << "]"
-                               << std::endl;
-               } else { // No world was specified; try to select it automatically
-                       // Get information about available worlds
-                       std::vector<WorldSpec> worldspecs = getAvailableWorlds();
-                       // If a world name was specified, select it
-                       if (commanded_worldname != "") {
-                               world_path = "";
-                               for(u32 i = 0; i < worldspecs.size(); i++) {
-                                       std::string name = worldspecs[i].name;
-                                       if (name == commanded_worldname) {
-                                               world_path = worldspecs[i].path;
-                                               break;
-                                       }
-                               }
-                               if (world_path == "") {
-                                       dstream << _("World") << " '" << commanded_worldname << "' " << _("not "
-                                               "available. Available worlds:") << std::endl;
-                                       print_worldspecs(worldspecs, dstream);
-                                       return 1;
-                               }
-                       }
-                       // If there is only a single world, use it
-                       if (worldspecs.size() == 1) {
-                               world_path = worldspecs[0].path;
-                               dstream <<_("Automatically selecting world at") << " ["
-                                       << world_path << "]" << std::endl;
-                       // If there are multiple worlds, list them
-                       } else if (worldspecs.size() > 1) {
-                               dstream << _("Multiple worlds are available.") << std::endl;
-                               dstream << _("Please select one using --worldname <name>"
-                                               " or --world <path>") << std::endl;
-                               print_worldspecs(worldspecs, dstream);
-                               return 1;
-                       // If there are no worlds, automatically create a new one
-                       } else {
-                               // This is the ultimate default world path
-                               world_path = porting::path_user + DIR_DELIM + "worlds" +
-                                               DIR_DELIM + "world";
-                               infostream << "Creating default world at ["
-                                               << world_path << "]" << std::endl;
+static bool determine_subgame(GameParams *game_params)
+{
+       SubgameSpec gamespec;
+
+       assert(game_params->world_path != "");  // pre-condition
+
+       verbosestream << _("Determining gameid/gamespec") << std::endl;
+       // If world doesn't exist
+       if (game_params->world_path != ""
+                       && !getWorldExists(game_params->world_path)) {
+               // Try to take gamespec from command line
+               if (game_params->game_spec.isValid()) {
+                       gamespec = game_params->game_spec;
+                       infostream << "Using commanded gameid [" << gamespec.id << "]" << std::endl;
+               } else { // Otherwise we will be using "minetest"
+                       gamespec = findSubgame(g_settings->get("default_game"));
+                       infostream << "Using default gameid [" << gamespec.id << "]" << std::endl;
+                       if (!gamespec.isValid()) {
+                               errorstream << "Subgame specified in default_game ["
+                                           << g_settings->get("default_game")
+                                           << "] is invalid." << std::endl;
+                               return false;
                        }
                }
-
-               if (world_path == "") {
-                       errorstream << "No world path specified or found." << std::endl;
-                       return 1;
-               }
-               verbosestream << _("Using world path") << " [" << world_path << "]" << std::endl;
-
-               // We need a gamespec.
-               SubgameSpec gamespec;
-               verbosestream << _("Determining gameid/gamespec") << std::endl;
-               // If world doesn't exist
-               if (!getWorldExists(world_path)) {
-                       // Try to take gamespec from command line
-                       if (commanded_gamespec.isValid()) {
-                               gamespec = commanded_gamespec;
-                               infostream << "Using commanded gameid [" << gamespec.id << "]" << std::endl;
-                       } else { // Otherwise we will be using "minetest"
-                               gamespec = findSubgame(g_settings->get("default_game"));
-                               infostream << "Using default gameid [" << gamespec.id << "]" << std::endl;
-                       }
-               } else { // World exists
-                       std::string world_gameid = getWorldGameId(world_path, is_legacy_world);
-                       // If commanded to use a gameid, do so
-                       if (commanded_gamespec.isValid()) {
-                               gamespec = commanded_gamespec;
-                               if (commanded_gamespec.id != world_gameid) {
-                                       errorstream << "WARNING: Using commanded gameid ["
-                                                       << gamespec.id << "]" << " instead of world gameid ["
-                                                       << world_gameid << "]" << std::endl;
-                               }
-                       } else {
-                               // If world contains an embedded game, use it;
-                               // Otherwise find world from local system.
-                               gamespec = findWorldSubgame(world_path);
-                               infostream << "Using world gameid [" << gamespec.id << "]" << std::endl;
+       } else { // World exists
+               std::string world_gameid = getWorldGameId(game_params->world_path, false);
+               // If commanded to use a gameid, do so
+               if (game_params->game_spec.isValid()) {
+                       gamespec = game_params->game_spec;
+                       if (game_params->game_spec.id != world_gameid) {
+                               errorstream << "WARNING: Using commanded gameid ["
+                                           << gamespec.id << "]" << " instead of world gameid ["
+                                           << world_gameid << "]" << std::endl;
                        }
+               } else {
+                       // If world contains an embedded game, use it;
+                       // Otherwise find world from local system.
+                       gamespec = findWorldSubgame(game_params->world_path);
+                       infostream << "Using world gameid [" << gamespec.id << "]" << std::endl;
                }
-               if (!gamespec.isValid()) {
-                       errorstream << "Subgame [" << gamespec.id << "] could not be found."
-                                       << std::endl;
-                       return 1;
-               }
-               verbosestream << _("Using gameid") << " [" << gamespec.id<<"]" << std::endl;
-
-               // Bind address
-               std::string bind_str = g_settings->get("bind_address");
-               Address bind_addr(0, 0, 0, 0, port);
-
-               if (g_settings->getBool("ipv6_server")) {
-                       bind_addr.setAddress((IPv6AddressBytes*) NULL);
-               }
-               try {
-                       bind_addr.Resolve(bind_str.c_str());
-               } catch (ResolveError &e) {
-                       infostream << "Resolving bind address \"" << bind_str
-                                  << "\" failed: " << e.what()
-                                  << " -- Listening on all addresses." << std::endl;
-               }
-               if (bind_addr.isIPv6() && !g_settings->getBool("enable_ipv6")) {
-                       errorstream << "Unable to listen on "
-                                   << bind_addr.serializeString()
-                                   << L" because IPv6 is disabled" << std::endl;
-                       return 1;
-               }
-
-               // Create server
-               Server server(world_path, gamespec, false, bind_addr.isIPv6());
-
-               // Database migration
-               if (cmd_args.exists("migrate")) {
-                       std::string migrate_to = cmd_args.get("migrate");
-                       Settings world_mt;
-                       bool success = world_mt.readConfigFile((world_path + DIR_DELIM
-                               + "world.mt").c_str());
-                       if (!success) {
-                               errorstream << "Cannot read world.mt" << std::endl;
-                               return 1;
-                       }
-                       if (!world_mt.exists("backend")) {
-                               errorstream << "Please specify your current backend in world.mt file:"
-                                       << std::endl << "       backend = {sqlite3|leveldb|redis|dummy}" << std::endl;
-                               return 1;
-                       }
-                       std::string backend = world_mt.get("backend");
-                       Database *new_db;
-                       if (backend == migrate_to) {
-                               errorstream << "Cannot migrate: new backend is same"
-                                       <<" as the old one" << std::endl;
-                               return 1;
-                       }
-                       if (migrate_to == "sqlite3")
-                               new_db = new Database_SQLite3(&(ServerMap&)server.getMap(), world_path);
-                       #if USE_LEVELDB
-                       else if (migrate_to == "leveldb")
-                               new_db = new Database_LevelDB(&(ServerMap&)server.getMap(), world_path);
-                       #endif
-                       #if USE_REDIS
-                       else if (migrate_to == "redis")
-                               new_db = new Database_Redis(&(ServerMap&)server.getMap(), world_path);
-                       #endif
-                       else {
-                               errorstream << "Migration to " << migrate_to
-                                       << " is not supported" << std::endl;
-                               return 1;
-                       }
-
-                       std::list<v3s16> blocks;
-                       ServerMap &old_map = ((ServerMap&)server.getMap());
-                       old_map.listAllLoadableBlocks(blocks);
-                       int count = 0;
-                       new_db->beginSave();
-                       for (std::list<v3s16>::iterator i = blocks.begin(); i != blocks.end(); i++) {
-                               MapBlock *block = old_map.loadBlock(*i);
-                               if (!block) {
-                                       errorstream << "Failed to load block " << PP(*i) << ", skipping it.";
-                               } else {
-                                       old_map.saveBlock(block, new_db);
-                                       MapSector *sector = old_map.getSectorNoGenerate(v2s16(i->X, i->Z));
-                                       sector->deleteBlock(block);
-                               }
-                               ++count;
-                               if (count % 500 == 0)
-                                       actionstream << "Migrated " << count << " blocks "
-                                               << (100.0 * count / blocks.size()) << "% completed" << std::endl;
-                       }
-                       new_db->endSave();
-                       delete new_db;
-
-                       actionstream << "Successfully migrated " << count << " blocks" << std::endl;
-                       world_mt.set("backend", migrate_to);
-                       if (!world_mt.updateConfigFile((world_path + DIR_DELIM + "world.mt").c_str()))
-                               errorstream << "Failed to update world.mt!" << std::endl;
-                       else
-                               actionstream << "world.mt updated" << std::endl;
+       }
 
-                       return 0;
-               }
+       if (!gamespec.isValid()) {
+               errorstream << "Subgame [" << gamespec.id << "] could not be found."
+                           << std::endl;
+               return false;
+       }
 
-               server.start(bind_addr);
+       game_params->game_spec = gamespec;
+       return true;
+}
 
-               // Run server
-               dedicated_server_loop(server, kill);
 
-               return 0;
+/*****************************************************************************
+ * Dedicated server
+ *****************************************************************************/
+static bool run_dedicated_server(const GameParams &game_params, const Settings &cmd_args)
+{
+       DSTACK("Dedicated server branch");
+
+       verbosestream << _("Using world path") << " ["
+                     << game_params.world_path << "]" << std::endl;
+       verbosestream << _("Using gameid") << " ["
+                     << game_params.game_spec.id << "]" << std::endl;
+
+       // Bind address
+       std::string bind_str = g_settings->get("bind_address");
+       Address bind_addr(0, 0, 0, 0, game_params.socket_port);
+
+       if (g_settings->getBool("ipv6_server")) {
+               bind_addr.setAddress((IPv6AddressBytes*) NULL);
+       }
+       try {
+               bind_addr.Resolve(bind_str.c_str());
+       } catch (ResolveError &e) {
+               infostream << "Resolving bind address \"" << bind_str
+                          << "\" failed: " << e.what()
+                          << " -- Listening on all addresses." << std::endl;
+       }
+       if (bind_addr.isIPv6() && !g_settings->getBool("enable_ipv6")) {
+               errorstream << "Unable to listen on "
+                           << bind_addr.serializeString()
+                           << L" because IPv6 is disabled" << std::endl;
+               return false;
        }
 
-#ifndef SERVER // Exclude from dedicated server build
-
-       /*
-               More parameters
-       */
+       // Create server
+       Server server(game_params.world_path,
+                       game_params.game_spec, false, bind_addr.isIPv6());
 
-       std::string address = g_settings->get("address");
-       if (commanded_world != "")
-               address = "";
-       else if (cmd_args.exists("address"))
-               address = cmd_args.get("address");
+       // Database migration
+       if (cmd_args.exists("migrate"))
+               return migrate_database(game_params, cmd_args, &server);
 
-       std::string playername = g_settings->get("name");
-       if (cmd_args.exists("name"))
-               playername = cmd_args.get("name");
+       server.start(bind_addr);
 
-       bool skip_main_menu = cmd_args.getFlag("go");
+       // Run server
+       bool &kill = *porting::signal_handler_killstatus();
+       dedicated_server_loop(server, kill);
 
-       /*
-               Device initialization
-       */
+       return true;
+}
 
-       // Resolution selection
+static bool migrate_database(const GameParams &game_params, const Settings &cmd_args,
+               Server *server)
+{
+       Settings world_mt;
+       bool success = world_mt.readConfigFile((game_params.world_path
+                       + DIR_DELIM + "world.mt").c_str());
+       if (!success) {
+               errorstream << "Cannot read world.mt" << std::endl;
+               return false;
+       }
 
-       bool fullscreen = g_settings->getBool("fullscreen");
-       u16 screenW = g_settings->getU16("screenW");
-       u16 screenH = g_settings->getU16("screenH");
+       if (!world_mt.exists("backend")) {
+               errorstream << "Please specify your current backend in world.mt file:"
+                           << std::endl << "   backend = {sqlite3|leveldb|redis|dummy}"
+                           << std::endl;
+               return false;
+       }
 
-       // bpp, fsaa, vsync
+       std::string backend = world_mt.get("backend");
+       Database *new_db;
+       std::string migrate_to = cmd_args.get("migrate");
 
-       bool vsync = g_settings->getBool("vsync");
-       u16 bits = g_settings->getU16("fullscreen_bpp");
-       u16 fsaa = g_settings->getU16("fsaa");
+       if (backend == migrate_to) {
+               errorstream << "Cannot migrate: new backend is same as the old one"
+                           << std::endl;
+               return false;
+       }
 
-       // Determine driver
-       video::E_DRIVER_TYPE driverType = video::EDT_OPENGL;
-       static const char* driverids[] = {
-               "null",
-               "software",
-               "burningsvideo",
-               "direct3d8",
-               "direct3d9",
-               "opengl"
-#ifdef _IRR_COMPILE_WITH_OGLES1_
-               ,"ogles1"
+       if (migrate_to == "sqlite3")
+               new_db = new Database_SQLite3(&(ServerMap&)server->getMap(),
+                               game_params.world_path);
+#if USE_LEVELDB
+       else if (migrate_to == "leveldb")
+               new_db = new Database_LevelDB(&(ServerMap&)server->getMap(),
+                               game_params.world_path);
 #endif
-#ifdef _IRR_COMPILE_WITH_OGLES2_
-               ,"ogles2"
+#if USE_REDIS
+       else if (migrate_to == "redis")
+               new_db = new Database_Redis(&(ServerMap&)server->getMap(),
+                               game_params.world_path);
 #endif
-               ,"invalid"
-       };
+       else {
+               errorstream << "Migration to " << migrate_to << " is not supported"
+                           << std::endl;
+               return false;
+       }
 
-       std::string driverstring = g_settings->get("video_driver");
-       for (unsigned int i = 0;
-                       i < (sizeof(driverids)/sizeof(driverids[0]));
-                       i++)
-       {
-               if (strcasecmp(driverstring.c_str(), driverids[i]) == 0) {
-                       driverType = (video::E_DRIVER_TYPE) i;
-                       break;
+       std::list<v3s16> blocks;
+       ServerMap &old_map = ((ServerMap&)server->getMap());
+       old_map.listAllLoadableBlocks(blocks);
+       int count = 0;
+       new_db->beginSave();
+       for (std::list<v3s16>::iterator i = blocks.begin(); i != blocks.end(); i++) {
+               MapBlock *block = old_map.loadBlock(*i);
+               if (!block) {
+                       errorstream << "Failed to load block " << PP(*i) << ", skipping it.";
+               } else {
+                       old_map.saveBlock(block, new_db);
+                       MapSector *sector = old_map.getSectorNoGenerate(v2s16(i->X, i->Z));
+                       sector->deleteBlock(block);
                }
+               ++count;
+               if (count % 500 == 0)
+                  actionstream << "Migrated " << count << " blocks "
+                          << (100.0 * count / blocks.size()) << "% completed" << std::endl;
+       }
+       new_db->endSave();
+       delete new_db;
+
+       actionstream << "Successfully migrated " << count << " blocks" << std::endl;
+       world_mt.set("backend", migrate_to);
+       if (!world_mt.updateConfigFile(
+                               (game_params.world_path+ DIR_DELIM + "world.mt").c_str()))
+               errorstream << "Failed to update world.mt!" << std::endl;
+       else
+               actionstream << "world.mt updated" << std::endl;
 
-               if (strcasecmp("invalid", driverids[i]) == 0) {
-                       errorstream << "WARNING: Invalid video_driver specified; defaulting "
-                               << "to opengl" << std::endl;
-                       break;
-               }
-       }
+       return true;
+}
 
-       /*
-               List video modes if requested
-       */
-       MyEventReceiver* receiver = new MyEventReceiver();
 
-       if (cmd_args.getFlag("videomodes")) {
-               IrrlichtDevice *nulldevice;
+/*****************************************************************************
+ * Client
+ *****************************************************************************/
+#ifndef SERVER
 
-               SIrrlichtCreationParameters params = SIrrlichtCreationParameters();
-               params.DriverType    = video::EDT_NULL;
-               params.WindowSize    = core::dimension2d<u32>(640, 480);
-               params.Bits          = 24;
-               params.AntiAlias     = fsaa;
-               params.Fullscreen    = false;
-               params.Stencilbuffer = false;
-               params.Vsync         = vsync;
-               params.EventReceiver = receiver;
-               params.HighPrecisionFPU = g_settings->getBool("high_precision_fpu");
+ClientLauncher::~ClientLauncher()
+{
+       if (receiver)
+               delete receiver;
 
-               nulldevice = createDeviceEx(params);
+       if (input)
+               delete input;
 
-               if (nulldevice == 0)
-                       return 1;
+       if (g_fontengine)
+               delete g_fontengine;
 
-               dstream << _("Available video modes (WxHxD):") << std::endl;
+       if (device)
+               device->drop();
+}
 
-               video::IVideoModeList *videomode_list =
-                               nulldevice->getVideoModeList();
 
-               if (videomode_list == 0) {
-                       nulldevice->drop();
-                       return 1;
-               }
+bool ClientLauncher::run(GameParams &game_params, const Settings &cmd_args)
+{
+       init_args(game_params, cmd_args);
 
-               s32 videomode_count = videomode_list->getVideoModeCount();
-               core::dimension2d<u32> videomode_res;
-               s32 videomode_depth;
-               for (s32 i = 0; i < videomode_count; ++i) {
-                       videomode_res = videomode_list->getVideoModeResolution(i);
-                       videomode_depth = videomode_list->getVideoModeDepth(i);
-                       dstream<<videomode_res.Width << "x" << videomode_res.Height
-                                       << "x" << videomode_depth << std::endl;
-               }
+       // List video modes if requested
+       if (list_video_modes)
+               return print_video_modes();
 
-               dstream << _("Active video mode (WxHxD):") << std::endl;
-               videomode_res = videomode_list->getDesktopResolution();
-               videomode_depth = videomode_list->getDesktopDepth();
-               dstream << videomode_res.Width << "x" << videomode_res.Height
-                               << "x" << videomode_depth << std::endl;
+       if (!init_engine(game_params.log_level)) {
+               errorstream << "Could not initialize game engine." << std::endl;
+               return false;
+       }
 
-               nulldevice->drop();
+       // Speed tests (done after irrlicht is loaded to get timer)
+       if (cmd_args.getFlag("speedtests")) {
+               dstream << "Running speed tests" << std::endl;
+               speed_tests();
+               return true;
+       }
 
-               delete receiver;
-               return 0;
+       video::IVideoDriver *video_driver = device->getVideoDriver();
+       if (video_driver == NULL) {
+               errorstream << "Could not initialize video driver." << std::endl;
+               return false;
        }
 
+       porting::setXorgClassHint(video_driver->getExposedVideoData(), "Minetest");
+
        /*
-               Create device and exit if creation failed
+               This changes the minimum allowed number of vertices in a VBO.
+               Default is 500.
        */
-       SIrrlichtCreationParameters params = SIrrlichtCreationParameters();
-       params.DriverType    = driverType;
-       params.WindowSize    = core::dimension2d<u32>(screenW, screenH);
-       params.Bits          = bits;
-       params.AntiAlias     = fsaa;
-       params.Fullscreen    = fullscreen;
-       params.Stencilbuffer = false;
-       params.Vsync         = vsync;
-       params.EventReceiver = receiver;
-       params.HighPrecisionFPU = g_settings->getBool("high_precision_fpu");
-#ifdef __ANDROID__
-       params.PrivateData = porting::app_global;
-       params.OGLES2ShaderPath = std::string(porting::path_user + DIR_DELIM +
-                       "media" + DIR_DELIM + "Shaders" + DIR_DELIM).c_str();
-#endif
+       //driver->setMinHardwareBufferVertexCount(50);
 
-       IrrlichtDevice * device = createDeviceEx(params);
+       // Create time getter
+       g_timegetter = new IrrlichtTimeGetter(device);
 
-       if (device == 0) {
-               delete receiver;
-               return 1; // could not create selected driver.
-       }
-
-       // Map our log level to irrlicht engine one.
-       static const irr::ELOG_LEVEL irr_log_level[5] = {
-               ELL_NONE,
-               ELL_ERROR,
-               ELL_WARNING,
-               ELL_INFORMATION,
-#if (IRRLICHT_VERSION_MAJOR == 1 && IRRLICHT_VERSION_MINOR < 8)
-               ELL_INFORMATION
-#else
-               ELL_DEBUG
-#endif
-       };
-
-       ILogger* irr_logger = device->getLogger();
-       irr_logger->setLogLevel(irr_log_level[loglevel]);
-
-       porting::initIrrlicht(device);
-       late_init_default_settings(g_settings);
-
-       /*
-               Continue initialization
-       */
-
-       video::IVideoDriver* driver = device->getVideoDriver();
-
-       /*
-               This changes the minimum allowed number of vertices in a VBO.
-               Default is 500.
-       */
-       //driver->setMinHardwareBufferVertexCount(50);
-
-       // Create time getter
-       g_timegetter = new IrrlichtTimeGetter(device);
-
-       // Create game callback for menus
-       g_gamecallback = new MainGameCallback(device);
-
-       /*
-               Speed tests (done after irrlicht is loaded to get timer)
-       */
-       if (cmd_args.getFlag("speedtests"))
-       {
-               dstream << "Running speed tests" << std::endl;
-               SpeedTests();
-               device->drop();
-               return 0;
-       }
+       // Create game callback for menus
+       g_gamecallback = new MainGameCallback(device);
 
        device->setResizable(true);
 
-       bool random_input = g_settings->getBool("random_input")
-                       || cmd_args.getFlag("random-input");
-       InputHandler *input = NULL;
-
-       if (random_input) {
+       if (random_input)
                input = new RandomInputHandler();
-       } else {
-               input = new RealInputHandler(device,receiver);
-       }
-
-       scene::ISceneManager* smgr = device->getSceneManager();
-
-       guienv = device->getGUIEnvironment();
-       gui::IGUISkin* skin = guienv->getSkin();
-       std::string font_path = g_settings->get("font_path");
-       gui::IGUIFont *font;
-       #if USE_FREETYPE
-       bool use_freetype = g_settings->getBool("freetype");
-       if (use_freetype) {
-               std::string fallback;
-               if (is_yes(gettext("needs_fallback_font")))
-                       fallback = "fallback_";
-               u16 font_size = g_settings->getU16(fallback + "font_size");
-               font_path = g_settings->get(fallback + "font_path");
-               u32 font_shadow = g_settings->getU16(fallback + "font_shadow");
-               u32 font_shadow_alpha = g_settings->getU16(fallback + "font_shadow_alpha");
-               font = gui::CGUITTFont::createTTFont(guienv, font_path.c_str(), font_size,
-                       true, true, font_shadow, font_shadow_alpha);
-       } else {
-               font = guienv->getFont(font_path.c_str());
-       }
-       #else
-       font = guienv->getFont(font_path.c_str());
-       #endif
-       if (font)
-               skin->setFont(font);
        else
-               errorstream << "WARNING: Font file was not found."
-                               << " Using default font." << std::endl;
-       // If font was not found, this will get us one
-       font = skin->getFont();
-       assert(font);
+               input = new RealInputHandler(device, receiver);
 
-       u32 text_height = font->getDimension(L"Hello, world!").Height;
-       infostream << "text_height=" << text_height << std::endl;
+       smgr = device->getSceneManager();
 
+       guienv = device->getGUIEnvironment();
+       skin = guienv->getSkin();
        skin->setColor(gui::EGDC_BUTTON_TEXT, video::SColor(255, 255, 255, 255));
        skin->setColor(gui::EGDC_3D_HIGH_LIGHT, video::SColor(255, 0, 0, 0));
        skin->setColor(gui::EGDC_3D_SHADOW, video::SColor(255, 0, 0, 0));
        skin->setColor(gui::EGDC_HIGH_LIGHT, video::SColor(255, 70, 100, 50));
        skin->setColor(gui::EGDC_HIGH_LIGHT_TEXT, video::SColor(255, 255, 255, 255));
 
+       g_fontengine = new FontEngine(g_settings, guienv);
+       assert(g_fontengine != NULL);
+
 #if (IRRLICHT_VERSION_MAJOR >= 1 && IRRLICHT_VERSION_MINOR >= 8) || IRRLICHT_VERSION_MAJOR >= 2
        // Irrlicht 1.8 input colours
        skin->setColor(gui::EGDC_EDITABLE, video::SColor(255, 128, 128, 128));
        skin->setColor(gui::EGDC_FOCUSED_EDITABLE, video::SColor(255, 96, 134, 49));
 #endif
 
-
        // Create the menu clouds
        if (!g_menucloudsmgr)
                g_menucloudsmgr = smgr->createNewSceneManager();
        if (!g_menuclouds)
                g_menuclouds = new Clouds(g_menucloudsmgr->getRootSceneNode(),
-                       g_menucloudsmgr, -1, rand(), 100);
+                               g_menucloudsmgr, -1, rand(), 100);
        g_menuclouds->update(v2f(0, 0), video::SColor(255, 200, 200, 255));
        scene::ICameraSceneNode* camera;
        camera = g_menucloudsmgr->addCameraSceneNode(0,
@@ -1608,36 +1667,27 @@ int main(int argc, char *argv[])
 
        ChatBackend chat_backend;
 
-       /*
-               If an error occurs, this is set to something and the
-               menu-game loop is restarted. It is then displayed before
-               the menu.
-       */
+       // If an error occurs, this is set to something by menu().
+       // It is then displayed before  the menu shows on the next call to menu()
        std::wstring error_message = L"";
 
-       // The password entered during the menu screen,
-       std::string password;
-
        bool first_loop = true;
 
        /*
                Menu-game loop
        */
-       while (device->run() && (kill == false) &&
-                       (g_gamecallback->shutdown_requested == false))
+       bool retval = true;
+       bool *kill = porting::signal_handler_killstatus();
+
+       while (device->run() && !*kill && !g_gamecallback->shutdown_requested)
        {
                // Set the window caption
-               wchar_ttext = wgettext("Main Menu");
+               wchar_t *text = wgettext("Main Menu");
                device->setWindowCaption((std::wstring(L"Minetest [") + text + L"]").c_str());
                delete[] text;
 
-               // This is used for catching disconnects
-               try
-               {
+               try {   // This is used for catching disconnects
 
-                       /*
-                               Clear everything from the GUIEnvironment
-                       */
                        guienv->clear();
 
                        /*
@@ -1645,227 +1695,49 @@ int main(int argc, char *argv[])
                                custom gui elements directly on the screen.
                                Otherwise they won't be automatically drawn.
                        */
-                       guiroot = guienv->addStaticText(L"",
-                               core::rect<s32>(0, 0, 10000, 10000));
+                       guiroot = guienv->addStaticText(L"", core::rect<s32>(0, 0, 10000, 10000));
 
-                       SubgameSpec gamespec;
-                       WorldSpec worldspec;
-                       bool simple_singleplayer_mode = false;
+                       bool game_has_run = launch_game(&error_message, game_params, cmd_args);
 
-                       // These are set up based on the menu and other things
-                       std::string current_playername = "invĀ£lid";
-                       std::string current_password = "";
-                       std::string current_address = "does-not-exist";
-                       int current_port = 0;
+                       // If skip_main_menu, we only want to startup once
+                       if (skip_main_menu && !first_loop)
+                               break;
 
-                       /*
-                               Out-of-game menu loop.
+                       first_loop = false;
 
-                               Loop quits when menu returns proper parameters.
-                       */
-                       while (kill == false) {
-                               // If skip_main_menu, only go through here once
-                               if (skip_main_menu && !first_loop) {
-                                       kill = true;
+                       if (!game_has_run) {
+                               if (skip_main_menu)
                                        break;
-                               }
-                               first_loop = false;
-
-                               // Cursor can be non-visible when coming from the game
-                               #ifndef ANDROID
-                               device->getCursorControl()->setVisible(true);
-                               #endif
-                               // Some stuff are left to scene manager when coming from the game
-                               // (map at least?)
-                               smgr->clear();
-
-                               // Initialize menu data
-                               MainMenuData menudata;
-                               menudata.address = address;
-                               menudata.name = playername;
-                               menudata.port = itos(port);
-                               menudata.errormessage = wide_to_narrow(error_message);
-                               error_message = L"";
-                               if (cmd_args.exists("password"))
-                                       menudata.password = cmd_args.get("password");
-
-                               driver->setTextureCreationFlag(video::ETCF_CREATE_MIP_MAPS, g_settings->getBool("mip_map"));
-
-                               menudata.enable_public = g_settings->getBool("server_announce");
-
-                               std::vector<WorldSpec> worldspecs = getAvailableWorlds();
-
-                               // If a world was commanded, append and select it
-                               if(commanded_world != "") {
-                                       worldspec.gameid = getWorldGameId(commanded_world, true);
-                                       worldspec.name = _("[--world parameter]");
-                                       if(worldspec.gameid == "") {
-                                               worldspec.gameid = g_settings->get("default_game");
-                                               worldspec.name += " [new]";
-                                       }
-                                       worldspec.path = commanded_world;
-                               }
-
-                               if (skip_main_menu == false) {
-                                       video::IVideoDriver* driver = device->getVideoDriver();
-
-                                       infostream << "Waiting for other menus" << std::endl;
-                                       while (device->run() && kill == false) {
-                                               if (noMenuActive())
-                                                       break;
-                                               driver->beginScene(true, true,
-                                                               video::SColor(255, 128, 128, 128));
-                                               guienv->drawAll();
-                                               driver->endScene();
-                                               // On some computers framerate doesn't seem to be
-                                               // automatically limited
-                                               sleep_ms(25);
-                                       }
-                                       infostream << "Waited for other menus" << std::endl;
-
-                                       /* show main menu */
-                                       GUIEngine mymenu(device, guiroot, &g_menumgr,smgr,&menudata,kill);
-
-                                       //once finished you'll never end up here
-                                       smgr->clear();
-                               }
-
-                               if (menudata.errormessage != "") {
-                                       error_message = narrow_to_wide(menudata.errormessage);
-                                       continue;
-                               }
-
-                               //update worldspecs (necessary as new world may have been created)
-                               worldspecs = getAvailableWorlds();
-
-                               if (menudata.name == "")
-                                       menudata.name = std::string("Guest") + itos(myrand_range(1000,9999));
                                else
-                                       playername = menudata.name;
-
-                               password = translatePassword(playername, narrow_to_wide(menudata.password));
-                               //infostream<<"Main: password hash: '"<<password<<"'"<<std::endl;
-
-                               address = menudata.address;
-                               int newport = stoi(menudata.port);
-                               if (newport != 0)
-                                       port = newport;
-
-                               simple_singleplayer_mode = menudata.simple_singleplayer_mode;
-
-                               // Save settings
-                               g_settings->set("name", playername);
-
-                               // Break out of menu-game loop to shut down cleanly
-                               if (device->run() == false || kill == true)
-                                       break;
-
-                               current_playername = playername;
-                               current_password = password;
-                               current_address = address;
-                               current_port = port;
-
-                               // If using simple singleplayer mode, override
-                               if (simple_singleplayer_mode) {
-                                       current_playername = "singleplayer";
-                                       current_password = "";
-                                       current_address = "";
-                                       current_port = myrand_range(49152, 65535);
-                               } else if (address != "") {
-                                       ServerListSpec server;
-                                       server["name"] = menudata.servername;
-                                       server["address"] = menudata.address;
-                                       server["port"] = menudata.port;
-                                       server["description"] = menudata.serverdescription;
-                                       ServerList::insert(server);
-                               }
-
-                               if ((!skip_main_menu) &&
-                                               (menudata.selected_world >= 0) &&
-                                               (menudata.selected_world < (int)worldspecs.size())) {
-                                       g_settings->set("selected_world_path",
-                                                       worldspecs[menudata.selected_world].path);
-                                       worldspec = worldspecs[menudata.selected_world];
-
-                               }
-
-                               infostream <<"Selected world: " << worldspec.name
-                                                       << " ["<<worldspec.path<<"]" <<std::endl;
-
-
-                               // If local game
-                               if (current_address == "") {
-                                       if (worldspec.path == "") {
-                                               error_message = wgettext("No world selected and no address "
-                                                               "provided. Nothing to do.");
-                                               errorstream << wide_to_narrow(error_message) << std::endl;
-                                               continue;
-                                       }
-
-                                       if (!fs::PathExists(worldspec.path)) {
-                                               error_message = wgettext("Provided world path doesn't exist: ")
-                                                               + narrow_to_wide(worldspec.path);
-                                               errorstream << wide_to_narrow(error_message) << std::endl;
-                                               continue;
-                                       }
-
-                                       // Load gamespec for required game
-                                       gamespec = findWorldSubgame(worldspec.path);
-                                       if (!gamespec.isValid() && !commanded_gamespec.isValid()) {
-                                               error_message = wgettext("Could not find or load game \"")
-                                                               + narrow_to_wide(worldspec.gameid) + L"\"";
-                                               errorstream << wide_to_narrow(error_message) << std::endl;
-                                               continue;
-                                       }
-                                       if (commanded_gamespec.isValid() &&
-                                                       commanded_gamespec.id != worldspec.gameid) {
-                                               errorstream<<"WARNING: Overriding gamespec from \""
-                                                               << worldspec.gameid << "\" to \""
-                                                               << commanded_gamespec.id << "\"" << std::endl;
-                                               gamespec = commanded_gamespec;
-                                       }
-
-                                       if (!gamespec.isValid()) {
-                                               error_message = wgettext("Invalid gamespec.");
-                                               error_message += L" (world_gameid="
-                                                               + narrow_to_wide(worldspec.gameid) + L")";
-                                               errorstream << wide_to_narrow(error_message) << std::endl;
-                                               continue;
-                                       }
-                               }
-
-                               // Continue to game
-                               break;
+                                       continue;
                        }
 
                        // Break out of menu-game loop to shut down cleanly
-                       if (device->run() == false || kill == true) {
-                               if (g_settings_path != "") {
+                       if (!device->run() || *kill) {
+                               if (g_settings_path != "")
                                        g_settings->updateConfigFile(g_settings_path.c_str());
-                               }
                                break;
                        }
 
                        if (current_playername.length() > PLAYERNAME_SIZE-1) {
                                error_message = wgettext("Player name too long.");
-                               playername = current_playername.substr(0,PLAYERNAME_SIZE-1);
+                               playername = current_playername.substr(0, PLAYERNAME_SIZE-1);
                                g_settings->set("name", playername);
                                continue;
                        }
 
-                       /*
-                               Run game
-                       */
+                       device->getVideoDriver()->setTextureCreationFlag(
+                                       video::ETCF_CREATE_MIP_MAPS, g_settings->getBool("mip_map"));
+
 #ifdef HAVE_TOUCHSCREENGUI
-       receiver->m_touchscreengui = new TouchScreenGUI(device, receiver);
-       g_touchscreengui = receiver->m_touchscreengui;
+                       receiver->m_touchscreengui = new TouchScreenGUI(device, receiver);
+                       g_touchscreengui = receiver->m_touchscreengui;
 #endif
                        the_game(
-                               &kill,
+                               kill,
                                random_input,
                                input,
                                device,
-                               font,
                                worldspec.path,
                                current_playername,
                                current_password,
@@ -1877,21 +1749,21 @@ int main(int argc, char *argv[])
                                simple_singleplayer_mode
                        );
                        smgr->clear();
+
 #ifdef HAVE_TOUCHSCREENGUI
-       delete g_touchscreengui;
-       g_touchscreengui = NULL;
-       receiver->m_touchscreengui = NULL;
+                       delete g_touchscreengui;
+                       g_touchscreengui = NULL;
+                       receiver->m_touchscreengui = NULL;
 #endif
 
                } //try
-               catch(con::PeerNotFoundException &e)
-               {
+               catch (con::PeerNotFoundException &e) {
                        error_message = wgettext("Connection error (timed out?)");
                        errorstream << wide_to_narrow(error_message) << std::endl;
                }
+
 #ifdef NDEBUG
-               catch(std::exception &e)
-               {
+               catch (std::exception &e) {
                        std::string narrow_message = "Some exception: \"";
                        narrow_message += e.what();
                        narrow_message += "\"";
@@ -1904,60 +1776,472 @@ int main(int argc, char *argv[])
                if (skip_main_menu) {
                        if (error_message != L"") {
                                verbosestream << "error_message = "
-                                               << wide_to_narrow(error_message) << std::endl;
-                               retval = 1;
+                                             << wide_to_narrow(error_message) << std::endl;
+                               retval = false;
                        }
                        break;
                }
        } // Menu-game loop
 
-
        g_menuclouds->drop();
        g_menucloudsmgr->drop();
 
-       delete input;
+       return retval;
+}
 
-       /*
-               In the end, delete the Irrlicht device.
-       */
-       device->drop();
+void ClientLauncher::init_args(GameParams &game_params, const Settings &cmd_args)
+{
+
+       skip_main_menu = cmd_args.getFlag("go");
+
+       // FIXME: This is confusing (but correct)
+
+       /* If world_path is set then override it unless skipping the main menu using
+        * the --go command line param. Else, give preference to the address
+        * supplied on the command line
+        */
+       address = g_settings->get("address");
+       if (game_params.world_path != "" && !skip_main_menu)
+               address = "";
+       else if (cmd_args.exists("address"))
+               address = cmd_args.get("address");
+
+       playername = g_settings->get("name");
+       if (cmd_args.exists("name"))
+               playername = cmd_args.get("name");
+
+       list_video_modes = cmd_args.getFlag("videomodes");
+
+       use_freetype = g_settings->getBool("freetype");
+
+       random_input = g_settings->getBool("random_input")
+                       || cmd_args.getFlag("random-input");
+}
+
+bool ClientLauncher::init_engine(int log_level)
+{
+       receiver = new MyEventReceiver();
+       create_engine_device(log_level);
+       return device != NULL;
+}
+
+bool ClientLauncher::launch_game(std::wstring *error_message,
+               GameParams &game_params, const Settings &cmd_args)
+{
+       // Initialize menu data
+       MainMenuData menudata;
+       menudata.address      = address;
+       menudata.name         = playername;
+       menudata.port         = itos(game_params.socket_port);
+       menudata.errormessage = wide_to_narrow(*error_message);
+
+       *error_message = L"";
+
+       if (cmd_args.exists("password"))
+               menudata.password = cmd_args.get("password");
+
+       menudata.enable_public = g_settings->getBool("server_announce");
+
+       // If a world was commanded, append and select it
+       if (game_params.world_path != "") {
+               worldspec.gameid = getWorldGameId(game_params.world_path, true);
+               worldspec.name = _("[--world parameter]");
 
-#if USE_FREETYPE
-       if (use_freetype)
-               font->drop();
+               if (worldspec.gameid == "") {   // Create new
+                       worldspec.gameid = g_settings->get("default_game");
+                       worldspec.name += " [new]";
+               }
+               worldspec.path = game_params.world_path;
+       }
+
+       /* Show the GUI menu
+        */
+       if (!skip_main_menu) {
+               main_menu(&menudata);
+
+               // Skip further loading if there was an exit signal.
+               if (*porting::signal_handler_killstatus())
+                       return false;
+
+               address = menudata.address;
+               int newport = stoi(menudata.port);
+               if (newport != 0)
+                       game_params.socket_port = newport;
+
+               simple_singleplayer_mode = menudata.simple_singleplayer_mode;
+
+               std::vector<WorldSpec> worldspecs = getAvailableWorlds();
+               worldspecs = getAvailableWorlds();
+
+               if (menudata.selected_world >= 0
+                               && menudata.selected_world < (int)worldspecs.size()) {
+                       g_settings->set("selected_world_path",
+                                       worldspecs[menudata.selected_world].path);
+                       worldspec = worldspecs[menudata.selected_world];
+               }
+       }
+
+       if (menudata.errormessage != "") {
+               /* The calling function will pass this back into this function upon the
+                * next iteration (if any) causing it to be displayed by the GUI
+                */
+               *error_message = narrow_to_wide(menudata.errormessage);
+               return false;
+       }
+
+       if (menudata.name == "")
+               menudata.name = std::string("Guest") + itos(myrand_range(1000, 9999));
+       else
+               playername = menudata.name;
+
+       password = translatePassword(playername, narrow_to_wide(menudata.password));
+
+       g_settings->set("name", playername);
+
+       current_playername = playername;
+       current_password   = password;
+       current_address    = address;
+       current_port       = game_params.socket_port;
+
+       // If using simple singleplayer mode, override
+       if (simple_singleplayer_mode) {
+               assert(skip_main_menu == false);
+               current_playername = "singleplayer";
+               current_password = "";
+               current_address = "";
+               current_port = myrand_range(49152, 65535);
+       } else if (address != "") {
+               ServerListSpec server;
+               server["name"] = menudata.servername;
+               server["address"] = menudata.address;
+               server["port"] = menudata.port;
+               server["description"] = menudata.serverdescription;
+               ServerList::insert(server);
+       }
+
+       infostream << "Selected world: " << worldspec.name
+                  << " [" << worldspec.path << "]" << std::endl;
+
+       if (current_address == "") { // If local game
+               if (worldspec.path == "") {
+                       *error_message = wgettext("No world selected and no address "
+                                       "provided. Nothing to do.");
+                       errorstream << wide_to_narrow(*error_message) << std::endl;
+                       return false;
+               }
+
+               if (!fs::PathExists(worldspec.path)) {
+                       *error_message = wgettext("Provided world path doesn't exist: ")
+                                       + narrow_to_wide(worldspec.path);
+                       errorstream << wide_to_narrow(*error_message) << std::endl;
+                       return false;
+               }
+
+               // Load gamespec for required game
+               gamespec = findWorldSubgame(worldspec.path);
+               if (!gamespec.isValid() && !game_params.game_spec.isValid()) {
+                       *error_message = wgettext("Could not find or load game \"")
+                                       + narrow_to_wide(worldspec.gameid) + L"\"";
+                       errorstream << wide_to_narrow(*error_message) << std::endl;
+                       return false;
+               }
+
+               if (porting::signal_handler_killstatus())
+                       return true;
+
+               if (game_params.game_spec.isValid() &&
+                               game_params.game_spec.id != worldspec.gameid) {
+                       errorstream << "WARNING: Overriding gamespec from \""
+                                   << worldspec.gameid << "\" to \""
+                                   << game_params.game_spec.id << "\"" << std::endl;
+                       gamespec = game_params.game_spec;
+               }
+
+               if (!gamespec.isValid()) {
+                       *error_message = wgettext("Invalid gamespec.");
+                       *error_message += L" (world_gameid="
+                                       + narrow_to_wide(worldspec.gameid) + L")";
+                       errorstream << wide_to_narrow(*error_message) << std::endl;
+                       return false;
+               }
+       }
+
+       return true;
+}
+
+void ClientLauncher::main_menu(MainMenuData *menudata)
+{
+       bool *kill = porting::signal_handler_killstatus();
+       video::IVideoDriver *driver = device->getVideoDriver();
+
+       infostream << "Waiting for other menus" << std::endl;
+       while (device->run() && *kill == false) {
+               if (noMenuActive())
+                       break;
+               driver->beginScene(true, true, video::SColor(255, 128, 128, 128));
+               guienv->drawAll();
+               driver->endScene();
+               // On some computers framerate doesn't seem to be automatically limited
+               sleep_ms(25);
+       }
+       infostream << "Waited for other menus" << std::endl;
+
+       // Cursor can be non-visible when coming from the game
+#ifndef ANDROID
+       device->getCursorControl()->setVisible(true);
+#endif
+
+       /* show main menu */
+       GUIEngine mymenu(device, guiroot, &g_menumgr, smgr, menudata, *kill);
+
+       smgr->clear();  /* leave scene manager in a clean state */
+}
+
+bool ClientLauncher::create_engine_device(int log_level)
+{
+       static const char *driverids[] = {
+               "null",
+               "software",
+               "burningsvideo",
+               "direct3d8",
+               "direct3d9",
+               "opengl"
+#ifdef _IRR_COMPILE_WITH_OGLES1_
+               ,"ogles1"
+#endif
+#ifdef _IRR_COMPILE_WITH_OGLES2_
+               ,"ogles2"
 #endif
+               ,"invalid"
+       };
+
+       static const irr::ELOG_LEVEL irr_log_level[5] = {
+               ELL_NONE,
+               ELL_ERROR,
+               ELL_WARNING,
+               ELL_INFORMATION,
+#if (IRRLICHT_VERSION_MAJOR == 1 && IRRLICHT_VERSION_MINOR < 8)
+               ELL_INFORMATION
+#else
+               ELL_DEBUG
+#endif
+       };
+
+       // Resolution selection
+       bool fullscreen = g_settings->getBool("fullscreen");
+       u16 screenW = g_settings->getU16("screenW");
+       u16 screenH = g_settings->getU16("screenH");
+
+       // bpp, fsaa, vsync
+       bool vsync = g_settings->getBool("vsync");
+       u16 bits = g_settings->getU16("fullscreen_bpp");
+       u16 fsaa = g_settings->getU16("fsaa");
+
+       // Determine driver
+       video::E_DRIVER_TYPE driverType = video::EDT_OPENGL;
+
+       std::string driverstring = g_settings->get("video_driver");
+       for (size_t i = 0; i < sizeof driverids / sizeof driverids[0]; i++) {
+               if (strcasecmp(driverstring.c_str(), driverids[i]) == 0) {
+                       driverType = (video::E_DRIVER_TYPE) i;
+                       break;
+               }
+
+               if (strcasecmp("invalid", driverids[i]) == 0) {
+                       errorstream << "WARNING: Invalid video_driver specified;"
+                                   << " defaulting to opengl" << std::endl;
+                       break;
+               }
+       }
+
+       SIrrlichtCreationParameters params = SIrrlichtCreationParameters();
+       params.DriverType    = driverType;
+       params.WindowSize    = core::dimension2d<u32>(screenW, screenH);
+       params.Bits          = bits;
+       params.AntiAlias     = fsaa;
+       params.Fullscreen    = fullscreen;
+       params.Stencilbuffer = false;
+       params.Vsync         = vsync;
+       params.EventReceiver = receiver;
+       params.HighPrecisionFPU = g_settings->getBool("high_precision_fpu");
+#ifdef __ANDROID__
+       params.PrivateData = porting::app_global;
+       params.OGLES2ShaderPath = std::string(porting::path_user + DIR_DELIM +
+                       "media" + DIR_DELIM + "Shaders" + DIR_DELIM).c_str();
+#endif
+
+       device = createDeviceEx(params);
+
+       if (device) {
+               // Map our log level to irrlicht engine one.
+               ILogger* irr_logger = device->getLogger();
+               irr_logger->setLogLevel(irr_log_level[log_level]);
+
+               porting::initIrrlicht(device);
+       }
+
+       return device != NULL;
+}
+
+// Misc functions
+
+static bool print_video_modes()
+{
+       IrrlichtDevice *nulldevice;
+
+       bool vsync = g_settings->getBool("vsync");
+       u16 fsaa = g_settings->getU16("fsaa");
+       MyEventReceiver* receiver = new MyEventReceiver();
+
+       SIrrlichtCreationParameters params = SIrrlichtCreationParameters();
+       params.DriverType    = video::EDT_NULL;
+       params.WindowSize    = core::dimension2d<u32>(640, 480);
+       params.Bits          = 24;
+       params.AntiAlias     = fsaa;
+       params.Fullscreen    = false;
+       params.Stencilbuffer = false;
+       params.Vsync         = vsync;
+       params.EventReceiver = receiver;
+       params.HighPrecisionFPU = g_settings->getBool("high_precision_fpu");
+
+       nulldevice = createDeviceEx(params);
+
+       if (nulldevice == NULL) {
+               delete receiver;
+               return false;
+       }
+
+       dstream << _("Available video modes (WxHxD):") << std::endl;
+
+       video::IVideoModeList *videomode_list = nulldevice->getVideoModeList();
+
+       if (videomode_list != NULL) {
+               s32 videomode_count = videomode_list->getVideoModeCount();
+               core::dimension2d<u32> videomode_res;
+               s32 videomode_depth;
+               for (s32 i = 0; i < videomode_count; ++i) {
+                       videomode_res = videomode_list->getVideoModeResolution(i);
+                       videomode_depth = videomode_list->getVideoModeDepth(i);
+                       dstream << videomode_res.Width << "x" << videomode_res.Height
+                               << "x" << videomode_depth << std::endl;
+               }
+
+               dstream << _("Active video mode (WxHxD):") << std::endl;
+               videomode_res = videomode_list->getDesktopResolution();
+               videomode_depth = videomode_list->getDesktopDepth();
+               dstream << videomode_res.Width << "x" << videomode_res.Height
+                       << "x" << videomode_depth << std::endl;
+
+       }
+
+       nulldevice->drop();
        delete receiver;
+
+       return videomode_list != NULL;
+}
+
 #endif // !SERVER
 
-       // Update configuration file
-       if (g_settings_path != "")
-               g_settings->updateConfigFile(g_settings_path.c_str());
+/*****************************************************************************
+ * Performance tests
+ *****************************************************************************/
+#ifndef SERVER
+static void speed_tests()
+{
+       // volatile to avoid some potential compiler optimisations
+       volatile static s16 temp16;
+       volatile static f32 tempf;
+       static v3f tempv3f1;
+       static v3f tempv3f2;
+       static std::string tempstring;
+       static std::string tempstring2;
+
+       tempv3f1 = v3f();
+       tempv3f2 = v3f();
+       tempstring = std::string();
+       tempstring2 = std::string();
 
-       // Print modified quicktune values
        {
-               bool header_printed = false;
-               std::vector<std::string> names = getQuicktuneNames();
-               for(u32 i = 0; i < names.size(); i++) {
-                       QuicktuneValue val = getQuicktuneValue(names[i]);
-                       if (!val.modified)
-                               continue;
-                       if (!header_printed) {
-                               dstream << "Modified quicktune values:" << std::endl;
-                               header_printed = true;
+               infostream << "The following test should take around 20ms." << std::endl;
+               TimeTaker timer("Testing std::string speed");
+               const u32 jj = 10000;
+               for (u32 j = 0; j < jj; j++) {
+                       tempstring = "";
+                       tempstring2 = "";
+                       const u32 ii = 10;
+                       for (u32 i = 0; i < ii; i++) {
+                               tempstring2 += "asd";
+                       }
+                       for (u32 i = 0; i < ii+1; i++) {
+                               tempstring += "asd";
+                               if (tempstring == tempstring2)
+                                       break;
                        }
-                       dstream<<names[i] << " = " << val.getString() << std::endl;
                }
        }
 
-       // Stop httpfetch thread (if started)
-       httpfetch_cleanup();
+       infostream << "All of the following tests should take around 100ms each."
+                  << std::endl;
 
-       END_DEBUG_EXCEPTION_HANDLER(errorstream)
+       {
+               TimeTaker timer("Testing floating-point conversion speed");
+               tempf = 0.001;
+               for (u32 i = 0; i < 4000000; i++) {
+                       temp16 += tempf;
+                       tempf += 0.001;
+               }
+       }
 
-       debugstreams_deinit();
+       {
+               TimeTaker timer("Testing floating-point vector speed");
 
+               tempv3f1 = v3f(1, 2, 3);
+               tempv3f2 = v3f(4, 5, 6);
+               for (u32 i = 0; i < 10000000; i++) {
+                       tempf += tempv3f1.dotProduct(tempv3f2);
+                       tempv3f2 += v3f(7, 8, 9);
+               }
+       }
 
-       return retval;
-}
+       {
+               TimeTaker timer("Testing std::map speed");
+
+               std::map<v2s16, f32> map1;
+               tempf = -324;
+               const s16 ii = 300;
+               for (s16 y = 0; y < ii; y++) {
+                       for (s16 x = 0; x < ii; x++) {
+                               map1[v2s16(x, y)] =  tempf;
+                               tempf += 1;
+                       }
+               }
+               for (s16 y = ii - 1; y >= 0; y--) {
+                       for (s16 x = 0; x < ii; x++) {
+                               tempf = map1[v2s16(x, y)];
+                       }
+               }
+       }
 
-//END
+       {
+               infostream << "Around 5000/ms should do well here." << std::endl;
+               TimeTaker timer("Testing mutex speed");
+
+               JMutex m;
+               u32 n = 0;
+               u32 i = 0;
+               do {
+                       n += 10000;
+                       for (; i < n; i++) {
+                               m.Lock();
+                               m.Unlock();
+                       }
+               }
+               // Do at least 10ms
+               while(timer.getTimerTime() < 10);
+
+               u32 dtime = timer.stop();
+               u32 per_ms = n / dtime;
+               infostream << "Done. " << dtime << "ms, " << per_ms << "/ms" << std::endl;
+       }
+}
+#endif