src/app/runtime.cpp

   1 #include "Application.hpp"
   2 #include "Environment.hpp"
   3 #include "Runtime.hpp"
   4
   5 #include "init.hpp"
   6 #include "../io/filesystem.hpp"
   7 #include "../io/TokenStreamReader.hpp"
   8
   9 #include <cctype>
  10 #include <cstdlib>
  11 #include <ctime>
  12 #include <fstream>
  13 #include <iostream>
  14 #include <SDL.h>
  15
  16 using namespace std;
  17
  18
  19 namespace {
  20
  21 string default_asset_path() {
  22         char *base = SDL_GetBasePath();
  23         string assets(base);
  24         assets += "assets/";
  25         SDL_free(base);
  26         return assets;
  27 }
  28
  29 string default_save_path() {
  30 #ifndef NDEBUG
  31         char *base = SDL_GetBasePath();
  32         string save(base);
  33         save += "saves/";
  34         SDL_free(base);
  35         return save;
  36 #else
  37         char *pref = SDL_GetPrefPath("localhorst", "gong");
  38         string save(pref);
  39         SDL_free(pref);
  40         return save;
  41 #endif
  42 }
  43
  44 }
  45
  46 namespace gong {
  47 namespace app {
  48
  49 void Config::Load(istream &is) {
  50         io::TokenStreamReader in(is);
  51         string name;
  52         while (in.HasMore()) {
  53                 if (in.Peek().type == io::Token::STRING) {
  54                         in.ReadString(name);
  55                 } else {
  56                         in.ReadIdentifier(name);
  57                 }
  58                 in.Skip(io::Token::EQUALS);
  59                 if (name == "audio.enabled") {
  60                         in.ReadBoolean(audio.enabled);
  61                 } else if (name == "input.keyboard") {
  62                         in.ReadBoolean(input.keyboard);
  63                 } else if (name == "input.mouse") {
  64                         in.ReadBoolean(input.mouse);
  65                 } else if (name == "input.pitch_sensitivity") {
  66                         in.ReadNumber(input.pitch_sensitivity);
  67                 } else if (name == "input.yaw_sensitivity") {
  68                         in.ReadNumber(input.yaw_sensitivity);
  69                 } else if (name == "net.host") {
  70                         in.ReadString(net.host);
  71                 } else if (name == "net.port") {
  72                         int port;
  73                         in.ReadNumber(port);
  74                         net.port = port;
  75                 } else if (name == "net.cmd_port") {
  76                         int port;
  77                         in.ReadNumber(port);
  78                         net.cmd_port = port;
  79                 } else if (name == "player.name") {
  80                         in.ReadString(player.name);
  81                 } else if (name == "video.dblbuf") {
  82                         in.ReadBoolean(video.dblbuf);
  83                 } else if (name == "video.vsync") {
  84                         in.ReadBoolean(video.vsync);
  85                 } else if (name == "video.msaa") {
  86                         in.ReadNumber(video.msaa);
  87                 } else if (name == "video.hud") {
  88                         in.ReadBoolean(video.hud);
  89                 } else if (name == "video.world") {
  90                         in.ReadBoolean(video.world);
  91                 } else if (name == "video.debug") {
  92                         in.ReadBoolean(video.debug);
  93                 }
  94                 if (in.HasMore() && in.Peek().type == io::Token::SEMICOLON) {
  95                         in.Skip(io::Token::SEMICOLON);
  96                 }
  97         }
  98 }
  99
 100 void Config::Save(ostream &out) {
 101         out << "audio.enabled = " << (audio.enabled ? "yes" : "no") << ';' << endl;
 102         out << "input.keyboard = " << (input.keyboard ? "on" : "off") << ';' << endl;
 103         out << "input.mouse = " << (input.keyboard ? "on" : "off") << ';' << endl;
 104         out << "input.pitch_sensitivity = " << input.pitch_sensitivity << ';' << endl;
 105         out << "input.yaw_sensitivity = " << input.yaw_sensitivity << ';' << endl;
 106         out << "net.host = \"" << net.host << "\";" << endl;
 107         out << "net.port = " << net.port << ';' << endl;
 108         out << "net.cmd_port = " << net.cmd_port << ';' << endl;
 109         out << "player.name = \"" << player.name << "\";" << endl;
 110         out << "video.dblbuf = " << (video.dblbuf ? "on" : "off") << ';' << endl;
 111         out << "video.vsync = " << (video.vsync ? "on" : "off") << ';' << endl;
 112         out << "video.msaa = " << video.msaa << ';' << endl;
 113         out << "video.hud = " << (video.hud ? "on" : "off") << ';' << endl;
 114         out << "video.world = " << (video.world ? "on" : "off") << ';' << endl;
 115         out << "video.debug = " << (video.debug ? "on" : "off") << ';' << endl;
 116 }
 117
 118
 119 HeadlessEnvironment::HeadlessEnvironment(const Config &config)
 120 : config(config)
 121 , loader(config.asset_path)
 122 , counter()
 123 , state() {
 124
 125 }
 126
 127 Environment::Environment(Window &win, const Config &config)
 128 : HeadlessEnvironment(config)
 129 , assets(loader)
 130 , audio()
 131 , viewport()
 132 , window(win)
 133 , msg_state(*this) {
 134         viewport.Clear();
 135         window.Flip();
 136 }
 137
 138 void Environment::ShowMessage(const char *msg) {
 139         cout << msg << endl;
 140         msg_state.SetMessage(msg);
 141         state.Push(&msg_state);
 142 }
 143
 144
 145 Runtime::Runtime() noexcept
 146 : name("gong")
 147 , mode(NORMAL)
 148 , target(STANDALONE)
 149 , n(0)
 150 , t(0)
 151 , config() {
 152
 153 }
 154
 155
 156 void Runtime::Initialize(int argc, const char *const *argv) {
 157         ReadArgs(argc, argv);
 158         if (mode == ERROR) return;
 159         ReadPreferences();
 160         ReadArgs(argc, argv);
 161 }
 162
 163 void Runtime::ReadArgs(int argc, const char *const *argv) {
 164         if (argc <= 0) return;
 165         name = argv[0];
 166
 167         bool options = true;
 168         bool error = false;
 169
 170         for (int i = 1; i < argc; ++i) {
 171                 const char *arg = argv[i];
 172                 if (!arg || arg[0] == '\0') {
 173                         cerr << "warning: found empty argument at position " << i << endl;
 174                         continue;
 175                 }
 176                 if (options && arg[0] == '-') {
 177                         if (arg[1] == '\0') {
 178                                 cerr << "warning: incomplete option list at position " << i << endl;
 179                         } else if (arg[1] == '-') {
 180                                 if (arg[2] == '\0') {
 181                                         // stopper
 182                                         options = false;
 183                                 } else {
 184                                         const char *param = arg + 2;
 185                                         // long option
 186                                         if (strcmp(param, "no-vsync") == 0) {
 187                                                 config.game.video.vsync = false;
 188                                         } else if (strcmp(param, "no-keyboard") == 0) {
 189                                                 config.game.input.keyboard = false;
 190                                         } else if (strcmp(param, "no-mouse") == 0) {
 191                                                 config.game.input.mouse = false;
 192                                         } else if (strcmp(param, "no-hud") == 0) {
 193                                                 config.game.video.hud = false;
 194                                         } else if (strcmp(param, "no-audio") == 0) {
 195                                                 config.game.audio.enabled = false;
 196                                         } else if (strcmp(param, "standalone") == 0) {
 197                                                 target = STANDALONE;
 198                                         } else if (strcmp(param, "server") == 0) {
 199                                                 target = SERVER;
 200                                         } else if (strcmp(param, "client") == 0) {
 201                                                 target = CLIENT;
 202                                         } else if (strcmp(param, "asset-path") == 0) {
 203                                                 ++i;
 204                                                 if (i >= argc || argv[i] == nullptr || argv[i][0] == '\0') {
 205                                                         cerr << "missing argument to --asset-path" << endl;
 206                                                         error = true;
 207                                                 } else {
 208                                                         config.env.asset_path = argv[i];
 209                                                 }
 210                                         } else if (strcmp(param, "host") == 0) {
 211                                                 ++i;
 212                                                 if (i >= argc || argv[i] == nullptr || argv[i][0] == '\0') {
 213                                                         cerr << "missing argument to --host" << endl;
 214                                                         error = true;
 215                                                 } else {
 216                                                         config.game.net.host = argv[i];
 217                                                 }
 218                                         } else if (strcmp(param, "port") == 0) {
 219                                                 ++i;
 220                                                 if (i >= argc || argv[i] == nullptr || argv[i][0] == '\0') {
 221                                                         cerr << "missing argument to --port" << endl;
 222                                                         error = true;
 223                                                 } else {
 224                                                         config.game.net.port = strtoul(argv[i], nullptr, 10);
 225                                                 }
 226                                         } else if (strcmp(param, "cmd-port") == 0) {
 227                                                 ++i;
 228                                                 if (i >= argc || argv[i] == nullptr || argv[i][0] == '\0') {
 229                                                         cerr << "missing argument to --cmd-port" << endl;
 230                                                         error = true;
 231                                                 } else {
 232                                                         config.game.net.cmd_port = strtoul(argv[i], nullptr, 10);
 233                                                 }
 234                                         } else if (strcmp(param, "player-name") == 0) {
 235                                                 ++i;
 236                                                 if (i >= argc || argv[i] == nullptr || argv[i][0] == '\0') {
 237                                                         cerr << "missing argument to --player-name" << endl;
 238                                                         error = true;
 239                                                 } else {
 240                                                         config.game.player.name = argv[i];
 241                                                 }
 242                                         } else if (strcmp(param, "save-path") == 0) {
 243                                                 ++i;
 244                                                 if (i >= argc || argv[i] == nullptr || argv[i][0] == '\0') {
 245                                                         cerr << "missing argument to --save-path" << endl;
 246                                                         error = true;
 247                                                 } else {
 248                                                         config.env.save_path = argv[i];
 249                                                 }
 250                                         } else {
 251                                                 cerr << "unknown option " << arg << endl;
 252                                                 error = true;
 253                                         }
 254                                 }
 255                         } else {
 256                                 // short options
 257                                 for (int j = 1; arg[j] != '\0'; ++j) {
 258                                         switch (arg[j]) {
 259                                                 case 'd':
 260                                                         config.game.video.dblbuf = false;
 261                                                         break;
 262                                                 case 'm':
 263                                                         ++i;
 264                                                         if (i >= argc || argv[i] == nullptr || argv[i][0] == '\0') {
 265                                                                 cerr << "missing argument to -m" << endl;
 266                                                                 error = true;
 267                                                         } else {
 268                                                                 config.game.video.msaa = strtoul(argv[i], nullptr, 10);
 269                                                         }
 270                                                         break;
 271                                                 case 'n':
 272                                                         ++i;
 273                                                         if (i >= argc || argv[i] == nullptr || argv[i][0] == '\0') {
 274                                                                 cerr << "missing argument to -n" << endl;
 275                                                                 error = true;
 276                                                         } else {
 277                                                                 n = strtoul(argv[i], nullptr, 10);
 278                                                         }
 279                                                         break;
 280                                                 case 't':
 281                                                         ++i;
 282                                                         if (i >= argc || argv[i] == nullptr || argv[i][0] == '\0') {
 283                                                                 cerr << "missing argument to -t" << endl;
 284                                                                 error = true;
 285                                                         } else {
 286                                                                 t = strtoul(argv[i], nullptr, 10);
 287                                                         }
 288                                                         break;
 289                                                 case '-':
 290                                                         // stopper
 291                                                         options = false;
 292                                                         break;
 293                                                 default:
 294                                                         cerr << "unknown option " << arg[j] << endl;
 295                                                         error = true;
 296                                                         break;
 297                                         }
 298                                 }
 299                         }
 300                 } else {
 301                         cerr << "unable to interpret argument "
 302                                 << i << " (" << arg << ")" << endl;
 303                         error = true;
 304                 }
 305         }
 306
 307         if (error) {
 308                 mode = ERROR;
 309         } else if (n > 0) {
 310                 if (t > 0) {
 311                         mode = FIXED_FRAME_LIMIT;
 312                 } else {
 313                         mode = FRAME_LIMIT;
 314                 }
 315         } else if (t > 0) {
 316                 mode = TIME_LIMIT;
 317         } else {
 318                 mode = NORMAL;
 319         }
 320
 321         if (config.env.asset_path.empty()) {
 322                 config.env.asset_path = default_asset_path();
 323         } else if (
 324                 config.env.asset_path.back() != '/' &&
 325                 config.env.asset_path.back() != '\\'
 326         ) {
 327                 config.env.asset_path += '/';
 328         }
 329         if (config.env.save_path.empty()) {
 330                 config.env.save_path = default_save_path();
 331         } else if (
 332                 config.env.save_path.back() != '/' &&
 333                 config.env.save_path.back() != '\\'
 334         ) {
 335                 config.env.save_path += '/';
 336         }
 337 }
 338
 339 void Runtime::ReadPreferences() {
 340         string prefs_path = config.env.save_path + "prefs.conf";
 341         if (io::is_file(prefs_path)) {
 342                 ifstream file(prefs_path);
 343                 config.game.Load(file);
 344         } else {
 345                 io::make_dirs(config.env.save_path);
 346                 ofstream file(prefs_path);
 347                 config.game.Save(file);
 348         }
 349 }
 350
 351 int Runtime::Execute() {
 352         if (mode == ERROR) {
 353                 return 1;
 354         }
 355
 356         InitHeadless init_headless;
 357
 358         switch (target) {
 359                 default:
 360                 case STANDALONE:
 361                         RunStandalone();
 362                         break;
 363                 case SERVER:
 364                         RunServer();
 365                         break;
 366                 case CLIENT:
 367                         RunClient();
 368                         break;
 369         }
 370
 371         return 0;
 372 }
 373
 374 void Runtime::RunStandalone() {
 375         Init init(config.game.video.dblbuf, config.game.video.msaa);
 376
 377         Environment env(init.window, config.env);
 378         env.viewport.VSync(config.game.video.vsync);
 379
 380         throw invalid_argument("standalone mode not implemented");
 381
 382         //Application app(env);
 383         //app.PushState(...);
 384         //Run(app);
 385 }
 386
 387 void Runtime::RunServer() {
 388         HeadlessEnvironment env(config.env);
 389
 390         throw invalid_argument("server mode not implemented");
 391
 392         //HeadlessApplication app(env);
 393         //app.PushState(...);
 394         //Run(app);
 395 }
 396
 397 void Runtime::RunClient() {
 398         Init init(config.game.video.dblbuf, config.game.video.msaa);
 399
 400         Environment env(init.window, config.env);
 401         env.viewport.VSync(config.game.video.vsync);
 402         throw invalid_argument("client mode not implemented");
 403
 404         //Application app(env);
 405         //app.PushState(...);
 406         //Run(app);
 407 }
 408
 409 void Runtime::Run(HeadlessApplication &app) {
 410         switch (mode) {
 411                 default:
 412                 case NORMAL:
 413                         app.Run();
 414                         break;
 415                 case FRAME_LIMIT:
 416                         app.RunN(n);
 417                         break;
 418                 case TIME_LIMIT:
 419                         app.RunT(t);
 420                         break;
 421                 case FIXED_FRAME_LIMIT:
 422                         app.RunS(n, t);
 423                         break;
 424         }
 425 }
 426
 427 }
 428 }