Small snake game in C
| 1 | #include "snake.h" |
| 2 | |
| 3 | |
| 4 | int main(int argc, char *args[]) { |
| 5 | |
| 6 | |
| 7 | /* command argument handling */ |
| 8 | if (!parse_parameters(argc, args)) |
| 9 | return 0; |
| 10 | |
| 11 | printf("\033[?1049h"); |
| 12 | |
| 13 | |
| 14 | /* game settings */ |
| 15 | |
| 16 | speed game_speed = AVERAGE; |
| 17 | selected game_size = {WIDTH, HEIGHT}; |
| 18 | |
| 19 | score leader_board[SCORE_NUMBER] = {}; |
| 20 | |
| 21 | |
| 22 | /* Handling Files to store settings & highscores */ |
| 23 | |
| 24 | |
| 25 | /* Making sure all the folders on the path exist */ |
| 26 | |
| 27 | char folder_path[PATH_MAX]; |
| 28 | |
| 29 | { |
| 30 | char xdg_path[PATH_MAX]; |
| 31 | |
| 32 | if (!create_xdg_folder(xdg_path)) |
| 33 | return 1; |
| 34 | |
| 35 | if(!create_folder(SETTINGS_FOLDER ,xdg_path, folder_path)) |
| 36 | return 1; |
| 37 | } |
| 38 | |
| 39 | |
| 40 | /* Settings file */ |
| 41 | |
| 42 | char *settings_path = malloc(strlen(folder_path) + strlen(SETTINGS_FILE) + 2); |
| 43 | sprintf(settings_path, "%s/%s", folder_path, SETTINGS_FILE); |
| 44 | |
| 45 | |
| 46 | { |
| 47 | |
| 48 | setting_arr settings; |
| 49 | |
| 50 | if (!init_setting_arr(&settings, 3)) { |
| 51 | printf("alloc issue\n"); |
| 52 | return 1; |
| 53 | } |
| 54 | |
| 55 | settings.settings[0] = game_speed; |
| 56 | settings.settings[1] = game_size.x; |
| 57 | settings.settings[2] = game_size.y; |
| 58 | |
| 59 | if (!read_settings(settings_path, settings)) { |
| 60 | printf("Issue reading files\n"); |
| 61 | return 1; |
| 62 | } |
| 63 | |
| 64 | game_speed = settings.settings[0]; |
| 65 | game_size.x = settings.settings[1]; |
| 66 | game_size.y = settings.settings[2]; |
| 67 | |
| 68 | free_setting_arr(settings); |
| 69 | } |
| 70 | |
| 71 | |
| 72 | /* Highscore file */ |
| 73 | |
| 74 | char *score_path = malloc(strlen(folder_path) + strlen(SCORE_FILE) + 2); |
| 75 | sprintf(score_path, "%s/%s", folder_path, SCORE_FILE); |
| 76 | |
| 77 | { |
| 78 | FILE* score_file = fopen(score_path, "r"); |
| 79 | |
| 80 | if (score_file != NULL) { |
| 81 | |
| 82 | char score_input[STRING_LEN]; |
| 83 | |
| 84 | uint8_t i; |
| 85 | for (i = 0; i < SCORE_NUMBER; i++) { |
| 86 | fgets(score_input, sizeof(score_input), score_file); |
| 87 | if (score_input[0] != '\0') { |
| 88 | uint8_t j; |
| 89 | for(j = 0; score_input[j] != '\0'; j++) { |
| 90 | if (score_input[j] == '\n' || score_input[j] == ' ' || score_input[j] == '\t') { |
| 91 | score_input[j] = '\0'; |
| 92 | break; |
| 93 | } |
| 94 | } |
| 95 | score_input[SCORE_LEN - 1] = '\0'; |
| 96 | strncpy(leader_board[i].name, score_input, SCORE_LEN); |
| 97 | } |
| 98 | |
| 99 | fgets(score_input, sizeof(score_input), score_file); |
| 100 | leader_board[i].points = string_to_num(score_input, 0, UINT16_MAX, leader_board[i].points); |
| 101 | } |
| 102 | fclose(score_file); |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | /* Setting up terminal with termios */ |
| 107 | |
| 108 | struct termios old, new; |
| 109 | |
| 110 | tcgetattr(STDIN_FILENO, &old); |
| 111 | |
| 112 | new = old; |
| 113 | |
| 114 | new.c_lflag &= ~(ECHO | ICANON); |
| 115 | new.c_cc[VMIN] = 0; |
| 116 | new.c_cc[VTIME] = 0; |
| 117 | |
| 118 | tcsetattr(STDIN_FILENO, TCSANOW, &new); |
| 119 | |
| 120 | srand(time(NULL)); |
| 121 | |
| 122 | printf("\033[?25l"); |
| 123 | |
| 124 | struct winsize init_size, current_size; |
| 125 | ioctl(STDOUT_FILENO, TIOCGWINSZ, &init_size); |
| 126 | current_size = init_size; |
| 127 | bool too_small = false; |
| 128 | |
| 129 | bool gameloop = true; |
| 130 | |
| 131 | /* Animation at the start */ |
| 132 | if (!start_animation()) |
| 133 | gameloop = false; |
| 134 | |
| 135 | |
| 136 | /* Menu */ |
| 137 | |
| 138 | bool menu = true; |
| 139 | main_menu setting = MAIN_MENU; |
| 140 | bool change_menu = true; |
| 141 | |
| 142 | main_menu selected_menu = NEW_GAME; |
| 143 | settings selected_setting = HEIGHT_S; |
| 144 | |
| 145 | uint16_t score = 0; |
| 146 | |
| 147 | snake my_snake; |
| 148 | my_snake.position = NULL; |
| 149 | |
| 150 | board_state **board = NULL; |
| 151 | board_state *values = NULL; |
| 152 | |
| 153 | |
| 154 | struct timespec mili100 = {0, 1000000 * 100}; |
| 155 | |
| 156 | while(gameloop) { |
| 157 | |
| 158 | bool play_game = false; |
| 159 | |
| 160 | while (menu) { |
| 161 | |
| 162 | direction pressed_key = DIRECTIONS; |
| 163 | |
| 164 | char string[STRING_LEN] = {}; |
| 165 | ssize_t length_string = read(STDIN_FILENO, string, sizeof(string) - 1); |
| 166 | |
| 167 | |
| 168 | ioctl(STDOUT_FILENO, TIOCGWINSZ, ¤t_size); |
| 169 | |
| 170 | if (current_size.ws_col != init_size.ws_col || |
| 171 | current_size.ws_row != init_size.ws_row) { |
| 172 | init_size = current_size; |
| 173 | change_menu = true; |
| 174 | } |
| 175 | |
| 176 | |
| 177 | if (length_string > 0) { |
| 178 | string[length_string] = '\0'; |
| 179 | |
| 180 | pressed_key = read_direction(string, false); |
| 181 | } |
| 182 | |
| 183 | if (pressed_key == Q_BUTTON || pressed_key == ESCAPE) { |
| 184 | if (setting != MAIN_MENU) { |
| 185 | setting = MAIN_MENU; |
| 186 | change_menu = true; |
| 187 | } else { |
| 188 | gameloop = false; |
| 189 | break; |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | |
| 194 | if (setting == MAIN_MENU) { |
| 195 | |
| 196 | if (!too_small) { |
| 197 | switch (pressed_key) { |
| 198 | case UP: |
| 199 | selected_menu = (selected_menu + (MAIN_MENU - 1)) % MAIN_MENU; |
| 200 | change_menu = true; |
| 201 | break; |
| 202 | case DOWN: |
| 203 | selected_menu = (selected_menu + 1) % MAIN_MENU; |
| 204 | change_menu = true; |
| 205 | break; |
| 206 | default: |
| 207 | break; |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | if (change_menu) { |
| 212 | too_small = draw_menu(selected_menu, init_size); |
| 213 | change_menu = false; |
| 214 | } |
| 215 | |
| 216 | if (pressed_key == ENTER && !too_small) { |
| 217 | switch (selected_menu) { |
| 218 | case NEW_GAME: |
| 219 | menu = false; |
| 220 | play_game = true; |
| 221 | break; |
| 222 | case SETTINGS: |
| 223 | setting = SETTINGS; |
| 224 | break; |
| 225 | case HIGHSCORE: |
| 226 | setting = HIGHSCORE; |
| 227 | break; |
| 228 | default: |
| 229 | menu = false; |
| 230 | gameloop = false; |
| 231 | break; |
| 232 | } |
| 233 | change_menu = true; |
| 234 | } |
| 235 | |
| 236 | } else if (setting == SETTINGS) { |
| 237 | |
| 238 | /* Settings Menu */ |
| 239 | |
| 240 | if (change_menu) { |
| 241 | |
| 242 | draw_settings(selected_setting, game_speed, game_size, init_size); |
| 243 | |
| 244 | change_menu = false; |
| 245 | } |
| 246 | |
| 247 | |
| 248 | if (pressed_key < DIRECTIONS) { |
| 249 | |
| 250 | int8_t setting_change = 0; |
| 251 | |
| 252 | switch (pressed_key) { |
| 253 | case UP: |
| 254 | selected_setting = (selected_setting + (SETTINGS_MENU - 1)) % SETTINGS_MENU; |
| 255 | break; |
| 256 | case DOWN: |
| 257 | selected_setting = (selected_setting + 1) % SETTINGS_MENU; |
| 258 | break; |
| 259 | case LEFT: |
| 260 | setting_change = 1; |
| 261 | break; |
| 262 | case RIGHT: |
| 263 | setting_change = -1; |
| 264 | break; |
| 265 | default: |
| 266 | break; |
| 267 | } |
| 268 | |
| 269 | if (setting_change) { |
| 270 | switch (selected_setting) { |
| 271 | case SPEED_S: |
| 272 | if ( |
| 273 | game_speed + setting_change <= SPEED_L - 1 && |
| 274 | ((int8_t) game_speed) + setting_change >= 0 |
| 275 | ) { |
| 276 | game_speed += setting_change; |
| 277 | } |
| 278 | break; |
| 279 | case WIDTH_S: |
| 280 | if ( |
| 281 | game_size.x - setting_change >= MIN_SIZE && |
| 282 | game_size.x - setting_change <= MAX_SIZE |
| 283 | ) { |
| 284 | game_size.x -= setting_change; |
| 285 | } |
| 286 | break; |
| 287 | case HEIGHT_S: |
| 288 | if ( |
| 289 | game_size.y - setting_change >= MIN_SIZE && |
| 290 | game_size.y - setting_change <= MAX_SIZE |
| 291 | ) { |
| 292 | game_size.y -= setting_change; |
| 293 | } |
| 294 | break; |
| 295 | default: |
| 296 | break; |
| 297 | } |
| 298 | } |
| 299 | |
| 300 | change_menu = true; |
| 301 | |
| 302 | } |
| 303 | |
| 304 | if (pressed_key == ENTER) { |
| 305 | switch (selected_setting) { |
| 306 | case BACK_S: |
| 307 | setting = MAIN_MENU; |
| 308 | break; |
| 309 | default: |
| 310 | break; |
| 311 | } |
| 312 | change_menu = true; |
| 313 | } |
| 314 | } else if (setting == HIGHSCORE) { |
| 315 | |
| 316 | if(change_menu) { |
| 317 | uint8_t i; |
| 318 | |
| 319 | for (i = 0; i < SCORE_NUMBER; i++) { |
| 320 | if (score > leader_board[i].points) |
| 321 | break; |
| 322 | } |
| 323 | |
| 324 | if (i < SCORE_NUMBER) { |
| 325 | |
| 326 | uint8_t new_score = i; |
| 327 | |
| 328 | for (i = SCORE_NUMBER - 1; i > new_score; i--) { |
| 329 | leader_board[i] = leader_board[i -1]; |
| 330 | } |
| 331 | |
| 332 | leader_board[new_score].points = score; |
| 333 | leader_board[new_score].name[0] = '\0'; |
| 334 | |
| 335 | draw_highscore (new_score, leader_board, init_size); |
| 336 | |
| 337 | score = 0; |
| 338 | change_menu = true; |
| 339 | |
| 340 | } else { |
| 341 | if (change_menu) { |
| 342 | draw_highscore (-1, leader_board, init_size); |
| 343 | change_menu = false; |
| 344 | } |
| 345 | } |
| 346 | } |
| 347 | |
| 348 | if(pressed_key == ENTER) { |
| 349 | setting = MAIN_MENU; |
| 350 | change_menu = true; |
| 351 | } |
| 352 | } else if(setting == NEW_GAME) { |
| 353 | |
| 354 | if (change_menu) { |
| 355 | draw_board(game_size, board, init_size, true, 2, score); |
| 356 | change_menu = false; |
| 357 | } |
| 358 | |
| 359 | if(pressed_key == ENTER) { |
| 360 | setting = HIGHSCORE; |
| 361 | change_menu = true; |
| 362 | |
| 363 | free(my_snake.position); |
| 364 | free(board); |
| 365 | free(values); |
| 366 | my_snake.position = NULL; |
| 367 | board = NULL; |
| 368 | values = NULL; |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | nanosleep(&mili100, NULL); |
| 373 | } |
| 374 | |
| 375 | menu = true; |
| 376 | |
| 377 | /* initialisation of the game */ |
| 378 | |
| 379 | if(play_game) { |
| 380 | |
| 381 | bool run = true; |
| 382 | |
| 383 | my_snake.length = STARTING_LENGTH; |
| 384 | |
| 385 | my_snake.position = malloc((my_snake.length + 1) * sizeof(snake_part)); |
| 386 | |
| 387 | direction shift = RIGHT; |
| 388 | direction tmp_direction = shift; |
| 389 | |
| 390 | { |
| 391 | uint16_t i; |
| 392 | |
| 393 | my_snake.position[0].coords.y = game_size.y >> 1; |
| 394 | my_snake.position[0].coords.x = game_size.x >> 1; |
| 395 | my_snake.position[0].directions[0] = shift; |
| 396 | my_snake.position[0].directions[1] = shift; |
| 397 | for (i = 1; i <= my_snake.length; i++) { |
| 398 | my_snake.position[i].coords.y = -1; |
| 399 | my_snake.position[i].coords.x = -1; |
| 400 | } |
| 401 | } |
| 402 | |
| 403 | board = malloc(game_size.y * sizeof(board_state*)); |
| 404 | values = calloc(game_size.y * game_size.x, sizeof(board_state)); |
| 405 | |
| 406 | if(board == NULL || values == NULL) |
| 407 | run = false; |
| 408 | |
| 409 | { |
| 410 | uint8_t i; |
| 411 | |
| 412 | for (i = 0; i < game_size.y; i++) |
| 413 | board[i] = values + i * game_size.x; |
| 414 | } |
| 415 | |
| 416 | update_field(my_snake, game_size, board, true); |
| 417 | |
| 418 | uint8_t paused = 0; |
| 419 | |
| 420 | |
| 421 | if ((too_small = draw_board(game_size, board, current_size, true, 0, score))) |
| 422 | paused = 1; |
| 423 | |
| 424 | |
| 425 | struct timespec milispeed = {0, 1000000 * (SPEED + game_speed * 25)}; |
| 426 | |
| 427 | /* start of the actual game loop */ |
| 428 | |
| 429 | while (run) { |
| 430 | |
| 431 | /* input handling */ |
| 432 | |
| 433 | |
| 434 | direction pressed_key; |
| 435 | |
| 436 | char string[STRING_LEN] = {}; |
| 437 | ssize_t length_string = read(STDIN_FILENO, string, sizeof(string) - 1); |
| 438 | |
| 439 | if (length_string > 0) { |
| 440 | string[length_string] = '\0'; |
| 441 | |
| 442 | pressed_key = read_direction(string, true); |
| 443 | |
| 444 | if (!too_small) { |
| 445 | if (pressed_key == P_BUTTON || pressed_key == ENTER) { |
| 446 | paused = (paused == 1) ? 0 : 1; |
| 447 | if (paused) |
| 448 | draw_board(game_size, board, current_size, true, paused, score); |
| 449 | } |
| 450 | |
| 451 | if (!paused && pressed_key < DIRECTIONS) |
| 452 | tmp_direction = pressed_key; |
| 453 | } |
| 454 | |
| 455 | if (pressed_key == Q_BUTTON || pressed_key == ESCAPE) |
| 456 | run = false; |
| 457 | } |
| 458 | |
| 459 | /* game logic */ |
| 460 | |
| 461 | /* |
| 462 | struct timeval current; |
| 463 | gettimeofday(¤t, NULL);*/ |
| 464 | |
| 465 | if (/*time_diff >= SPEED * 1000*/ true) { |
| 466 | |
| 467 | ioctl(STDOUT_FILENO, TIOCGWINSZ, ¤t_size); |
| 468 | |
| 469 | if (current_size.ws_col != init_size.ws_col || |
| 470 | current_size.ws_row != init_size.ws_row) { |
| 471 | init_size = current_size; |
| 472 | |
| 473 | paused = 1; |
| 474 | too_small = draw_board(game_size, board, current_size, true, paused, score); |
| 475 | } |
| 476 | |
| 477 | if (!paused) { |
| 478 | |
| 479 | if (tmp_direction < DIRECTIONS && |
| 480 | ((shift + (DIRECTIONS >> 1)) % DIRECTIONS) != tmp_direction) { |
| 481 | shift = tmp_direction; |
| 482 | } |
| 483 | |
| 484 | uint8_t update = update_snake(game_size ,&my_snake, shift); |
| 485 | |
| 486 | uint8_t head_y = my_snake.position[0].coords.y; |
| 487 | uint8_t head_x = my_snake.position[0].coords.x; |
| 488 | |
| 489 | if (board[head_y][head_x] == FRUIT) { |
| 490 | my_snake.length++; |
| 491 | score += 1 + |
| 492 | (((MAX_SIZE >> 1) / (game_size.y) + |
| 493 | (MAX_SIZE >> 1) / (game_size.x) + |
| 494 | (my_snake.length - STARTING_LENGTH)) / (game_speed + 1)); |
| 495 | snake_part *tmp = realloc(my_snake.position, (my_snake.length + 1) * sizeof(snake_part)); |
| 496 | if (tmp == NULL) { |
| 497 | gameloop = false; |
| 498 | break; |
| 499 | } |
| 500 | my_snake.position = tmp; |
| 501 | |
| 502 | my_snake.position[my_snake.length].coords.y = -1; |
| 503 | my_snake.position[my_snake.length].coords.x = -1; |
| 504 | } |
| 505 | |
| 506 | update_field(my_snake, game_size, board, false); |
| 507 | |
| 508 | draw_board(game_size, board, current_size, false, 0, score); |
| 509 | |
| 510 | switch (update) { |
| 511 | case 0: |
| 512 | gameloop = false; |
| 513 | break; |
| 514 | case 2: |
| 515 | setting = NEW_GAME; |
| 516 | run = false; |
| 517 | break; |
| 518 | default: |
| 519 | break; |
| 520 | } |
| 521 | |
| 522 | } |
| 523 | } |
| 524 | nanosleep(&milispeed, NULL); |
| 525 | } |
| 526 | } |
| 527 | } |
| 528 | |
| 529 | |
| 530 | |
| 531 | free(my_snake.position); |
| 532 | free(board); |
| 533 | free(values); |
| 534 | |
| 535 | tcsetattr(STDIN_FILENO, TCSANOW, &old); |
| 536 | printf("\033[?25h\n\n"); |
| 537 | |
| 538 | printf("\033[32m"); |
| 539 | printf("\033[2J\033[H"); |
| 540 | |
| 541 | |
| 542 | { |
| 543 | FILE* setting_file = fopen(settings_path, "w"); |
| 544 | |
| 545 | fprintf(setting_file, "%d\n%d\n%d", game_speed, game_size.x, game_size.y); |
| 546 | |
| 547 | fclose(setting_file); |
| 548 | |
| 549 | FILE* score_file = fopen(score_path, "w"); |
| 550 | uint8_t i; |
| 551 | |
| 552 | for (i = 0; i < SCORE_NUMBER; i++) { |
| 553 | fprintf(score_file, "%s\n%i\n", leader_board[i].name, leader_board[i].points); |
| 554 | } |
| 555 | |
| 556 | fclose(score_file); |
| 557 | } |
| 558 | |
| 559 | free(settings_path); |
| 560 | free(score_path); |
| 561 | |
| 562 | printf("\033[?1049l"); |
| 563 | |
| 564 | return 0; |
| 565 | } |