snake_c

public

Small snake game in C

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#include "snake.h"


int main(int argc, char *args[]) {

  /* command argument handling */

  if (argc > 1) {
    if (argc > 2) {
      printf("Too many parameters\n");
      goto help_info;
    }

    if (!strcmp(args[1], "-h") || !strcmp(args[1], "--help")) {

      printf("This is a small TUI snake game.\n\n");
      printf("Controls: Arrow keys/WASD to control the snake.\n");
      printf("          P/Enter to pause.\n");
      printf("          Q to quit.\n");

      return 0;
    }

    printf("Argument \"%s\" not recognized\n", args[1]);

  help_info:
    printf("Try \"-h\" or \"--help\" for more information\n");
    return 1;
  }

  
  /* game settings */

  speed game_speed = AVERAGE;
  selected game_size = {WIDTH, HEIGHT};

  score leader_board[SCORE_NUMBER] = {};

  /* Handling Files to store settings & highscores */

  char *env;
  char *folder_path;

  if ((env = getenv("XDG_DATA_HOME")) == NULL) {
    if ((env = getenv("HOME")) == NULL) {
      printf("are you ok?\n");
      return 1;
    }
    
    uint8_t error = 0;

    char local[] = "/.local";
    char share[] = "/share";

    folder_path = malloc(strlen(env) + strlen(local) + 
      strlen(share) + strlen(SETTINGS_FOLDER) + 2);

    sprintf(folder_path, "%s%s", env, local);
    error += make_folder(folder_path);

    strcat(folder_path, share);
    error += make_folder(folder_path);

    if (error <= 1) {
      printf("Failed to create Folder");
      return 1;
    } 
  } else {
    folder_path = malloc(strlen(env) + strlen(SETTINGS_FOLDER) + 2);
    sprintf(folder_path, "%s", env);
  }

  sprintf(folder_path + strlen(folder_path), "/%s", SETTINGS_FOLDER);
  if (!make_folder(folder_path)) {
    printf("Failed to create Folder");
    return 1;
  }

  char *settings_path = malloc(strlen(folder_path) + strlen(SETTINGS_FILE) + 2); 
  sprintf(settings_path, "%s/%s", folder_path, SETTINGS_FILE);


  {
    FILE* setting_file = fopen(settings_path, "r");

    if (setting_file != NULL) {
      
      char setting_input[STRING_LEN]; 

      fgets(setting_input, sizeof(setting_input), setting_file);
      game_speed = string_to_num(setting_input, 0, SPEED_L - 1, game_speed);

      fgets(setting_input, sizeof(setting_input), setting_file);
      game_size.x = string_to_num(setting_input, MIN_SIZE, MAX_SIZE, game_size.x);

      fgets(setting_input, sizeof(setting_input), setting_file);
      game_size.y = string_to_num(setting_input, MIN_SIZE, MAX_SIZE, game_size.y);

      fclose(setting_file);
    }
  }

  char *score_path = malloc(strlen(folder_path) + strlen(SCORE_FILE) + 2);
  sprintf(score_path, "%s/%s", folder_path, SCORE_FILE);

  free(folder_path);

  {
    FILE* score_file = fopen(score_path, "r");

    if (score_file != NULL) {

      char score_input[STRING_LEN];

      uint8_t i;
      for (i = 0; i < SCORE_NUMBER; i++) {
        fgets(score_input, sizeof(score_input), score_file);
        if (score_input[0] != '\0') {
          uint8_t j;
          for(j = 0; score_input[j] != '\0'; j++) {
            if (score_input[j] == '\n' || score_input[j] == ' ' || score_input[j] == '\t') {
              score_input[j] = '\0';
              break;
            }
          }
          score_input[SCORE_LEN - 1] = '\0';
          strncpy(leader_board[i].name, score_input, SCORE_LEN);
        }

        fgets(score_input, sizeof(score_input), score_file);
        leader_board[i].points = string_to_num(score_input, 0, UINT16_MAX, leader_board[i].points);
      }
      fclose(score_file);
    }
  }

  /* Setting up terminal with termios */

  struct termios old, new;

  tcgetattr(STDIN_FILENO, &old);

  new = old;

  new.c_lflag &= ~(ECHO | ICANON);
  new.c_cc[VMIN] = 0;
  new.c_cc[VTIME] = 0;

  tcsetattr(STDIN_FILENO, TCSANOW, &new);

  srand(time(NULL));

  printf("\033[?25l");

  struct winsize init_size, current_size;
  ioctl(STDOUT_FILENO, TIOCGWINSZ, &init_size);
  current_size = init_size;
  bool too_small = false;

  bool gameloop = true;

  /* Animation at the start */
  if (!start_animation())
    gameloop = false;


  /* Menu */

  bool menu = true;
  main_menu setting = MAIN_MENU;
  bool change_menu = true;

  main_menu selected_menu = NEW_GAME;
  settings selected_setting = HEIGHT_S;

  uint16_t score = 0;
  
  snake my_snake;
  my_snake.position = NULL;

  board_state **board = NULL;
  board_state *values = NULL;


  struct timespec mili100 = {0, 1000000 * 100};

  while(gameloop) {

    bool play_game = false;

    while (menu) {

      direction pressed_key = DIRECTIONS;

      char string[STRING_LEN] = {};
      ssize_t length_string = read(STDIN_FILENO, string, sizeof(string) - 1);


      ioctl(STDOUT_FILENO, TIOCGWINSZ, &current_size);

      if (current_size.ws_col != init_size.ws_col ||
          current_size.ws_row != init_size.ws_row) {
        init_size = current_size;
        change_menu = true;
      }


      if (length_string > 0) {
        string[length_string] = '\0';

        pressed_key = read_direction(string, false);
      }

      if (pressed_key == Q_KEY || pressed_key == ESCAPE) {
        if (setting != MAIN_MENU) {
          setting = MAIN_MENU;
          change_menu = true;
        } else {
          gameloop = false;
          break;
        }
      }


      if (setting == MAIN_MENU) {
        
        if (!too_small) {
          switch (pressed_key) {
            case UP:
              selected_menu = (selected_menu + (MAIN_MENU - 1)) % MAIN_MENU;
              change_menu = true;
              break;
            case DOWN:
              selected_menu = (selected_menu + 1) % MAIN_MENU;
              change_menu = true;
              break;
            default:
              break;
          }
        }

        if (change_menu) {
          too_small = draw_menu(selected_menu, init_size);
          change_menu = false;
        }

        if (pressed_key == ENTER && !too_small) {
          switch (selected_menu) {
          case NEW_GAME:
            menu = false;
            play_game = true;
            break;
          case SETTINGS:
            setting = SETTINGS;
            break;
          case HIGHSCORE:
            setting = HIGHSCORE;
            break;
          default:
            menu = false;
            gameloop = false; 
            break;
          }
          change_menu = true;
        }

      } else if (setting == SETTINGS) {

        /* Settings Menu */

        if (change_menu) {
          
          draw_settings(selected_setting, game_speed, game_size, init_size);

          change_menu = false;
        }


        if (pressed_key < DIRECTIONS) {

          int8_t setting_change = 0;

          switch (pressed_key) {
            case UP:
              selected_setting = (selected_setting + (SETTINGS_MENU - 1)) % SETTINGS_MENU;
              break;
            case DOWN:
              selected_setting = (selected_setting + 1) % SETTINGS_MENU;
              break;
            case LEFT:
              setting_change = 1;
              break;
            case RIGHT:
              setting_change = -1;
              break;
            default:
              break;
          }
          
          if (setting_change) {
            switch (selected_setting) {
              case SPEED_S:
                if (
                  game_speed + setting_change <= SPEED_L - 1 &&
                  ((int8_t) game_speed) + setting_change >= 0 
                ) {
                  game_speed += setting_change;
                }
                break;
              case WIDTH_S:
                if (
                  game_size.x - setting_change >= MIN_SIZE &&
                  game_size.x - setting_change <= MAX_SIZE
                ) {
                  game_size.x -= setting_change;
                }
                break;
              case HEIGHT_S:
                if (
                  game_size.y - setting_change >= MIN_SIZE &&
                  game_size.y - setting_change <= MAX_SIZE
                ) {
                  game_size.y -= setting_change;
                }
                break;
              default:
                break;
            }
          }

          change_menu = true;

        }

        if (pressed_key == ENTER) {
          switch (selected_setting) {
            case BACK_S:
              setting = MAIN_MENU;
              break;
            default:
              break;
          }
          change_menu = true;
        }
      } else if (setting == HIGHSCORE) {
        
        if(change_menu) {
          uint8_t i;

          for (i = 0; i < SCORE_NUMBER; i++) {
            if (score > leader_board[i].points)
              break;
          }

          if (i < SCORE_NUMBER) {

            uint8_t new_score = i;

            for (i = SCORE_NUMBER - 1; i > new_score; i--) {
              leader_board[i] = leader_board[i -1]; 
            }

            leader_board[new_score].points = score;
            leader_board[new_score].name[0] = '\0';

            draw_highscore (new_score, leader_board, init_size);
      
            score = 0;
            change_menu = true;

          } else {
            if (change_menu)
              draw_highscore (-1, leader_board, init_size);    
          }
        }

        if(pressed_key == ENTER) {
          setting = MAIN_MENU;
          change_menu = true;
        }
      } else if(setting == NEW_GAME) {

        if (change_menu)
          draw_board(game_size, board, init_size, true, 2, score);

        if(pressed_key == ENTER) {
          setting = HIGHSCORE;
          change_menu = true;

          free(my_snake.position);
          free(board);
          free(values);
          my_snake.position = NULL;
          board = NULL;
          values = NULL;
        }
      }

      nanosleep(&mili100, NULL);
    }

    menu = true;

    /* initialisation of the game */
  
    if(play_game) {

      bool run = true;

      my_snake.length = STARTING_LENGTH;

      my_snake.position = malloc((my_snake.length + 1) * sizeof(snake_part));

      direction shift = RIGHT;
      direction tmp_direction = shift;

      {
        uint16_t i;

        my_snake.position[0].coords.y = game_size.y >> 1;
        my_snake.position[0].coords.x = game_size.x >> 1;
        my_snake.position[0].directions[0] = shift;
        my_snake.position[0].directions[1] = shift;
        for (i = 1; i <= my_snake.length; i++) {
          my_snake.position[i].coords.y = -1;
          my_snake.position[i].coords.x = -1;
        }
      }

      board = malloc(game_size.y * sizeof(board_state*));
      values = calloc(game_size.y * game_size.x, sizeof(board_state));

      if(board == NULL || values == NULL)
        run = false;  

      {
        uint8_t i;

        for (i = 0; i < game_size.y; i++)
          board[i] = values + i * game_size.x;
      }

      update_field(my_snake, game_size, board, true);

      uint8_t paused = 0;


      if ((too_small = draw_board(game_size, board, current_size, true, 0, score)))
        paused = 1;


      struct timespec milispeed = {0, 1000000 * (SPEED + game_speed * 25)};

      /* start of the actual game loop */

      while (run) {

        /* input handling  */


        direction pressed_key;

        char string[STRING_LEN] = {};
        ssize_t length_string = read(STDIN_FILENO, string, sizeof(string) - 1);

        if (length_string > 0) {
          string[length_string] = '\0';

          pressed_key = read_direction(string, true);

          if (!too_small) {
            if (pressed_key == P_KEY || pressed_key == ENTER) {
              paused = (paused == 1) ? 0 : 1;
              if (paused)
                draw_board(game_size, board, current_size, true, paused, score);
            } 

            if (!paused && pressed_key < DIRECTIONS)
              tmp_direction = pressed_key;
          }

          if (pressed_key == Q_KEY || pressed_key == ESCAPE)
            run = false;
        }

        /* game logic */

        /*
        struct timeval current;
        gettimeofday(&current, NULL);*/

        if (/*time_diff >= SPEED * 1000*/ true) {

          ioctl(STDOUT_FILENO, TIOCGWINSZ, &current_size);

          if (current_size.ws_col != init_size.ws_col ||
              current_size.ws_row != init_size.ws_row) {
            init_size = current_size;

            paused = 1;
            too_small = draw_board(game_size, board, current_size, true, paused, score);
          }

          if (!paused) {

            if (tmp_direction < DIRECTIONS &&
                ((shift + (DIRECTIONS >> 1)) % DIRECTIONS) != tmp_direction) {
              shift = tmp_direction;
            }

            uint8_t update = update_snake(game_size ,&my_snake, shift);

            uint8_t head_y = my_snake.position[0].coords.y;
            uint8_t head_x = my_snake.position[0].coords.x;

            if (board[head_y][head_x] == FRUIT) {
              my_snake.length++;
              score += 1 + 
                (((MAX_SIZE >> 1) / (game_size.y) + 
                (MAX_SIZE >> 1) / (game_size.x) + 
                (my_snake.length - STARTING_LENGTH)) / (game_speed + 1));
              snake_part *tmp = realloc(my_snake.position, (my_snake.length + 1) * sizeof(snake_part));
              if (tmp == NULL) {
                gameloop = false;
                break;
              }
              my_snake.position = tmp;

              my_snake.position[my_snake.length].coords.y = -1;
              my_snake.position[my_snake.length].coords.x = -1;
            }

            update_field(my_snake, game_size, board, false);

            draw_board(game_size, board, current_size, false, 0, score);

            switch (update) {
              case 0: 
                gameloop = false;
                break;
              case 2:
                setting = NEW_GAME;
                run = false;
                break;
              default:
                break;
            }

          }
        }
        nanosleep(&milispeed, NULL);
      }
    }
  }



  free(my_snake.position);
  free(board);
  free(values);

  tcsetattr(STDIN_FILENO, TCSANOW, &old);
  printf("\033[?25h\n\n");

  printf("\033[32m");
  printf("\033[2J\033[H");


  {
    FILE* setting_file = fopen(settings_path, "w");

    fprintf(setting_file, "%d\n%d\n%d", game_speed, game_size.x, game_size.y);
    
    fclose(setting_file);

    FILE* score_file = fopen(score_path, "w");
    uint8_t i;

    for (i = 0; i < SCORE_NUMBER; i++) {
      fprintf(score_file, "%s\n%i\n", leader_board[i].name, leader_board[i].points);
    }

    fclose(score_file);
  }

  free(settings_path);
  free(score_path);
  
  return 0;
}

1	#include "snake.h"
2
3
4	int main(int argc, char *args[]) {
5
6	/* command argument handling */
7
8	if (argc > 1) {
9	if (argc > 2) {
10	printf("Too many parameters\n");
11	goto help_info;
12	}
13
14	if (!strcmp(args[1], "-h") \|\| !strcmp(args[1], "--help")) {
15
16	printf("This is a small TUI snake game.\n\n");
17	printf("Controls: Arrow keys/WASD to control the snake.\n");
18	printf(" P/Enter to pause.\n");
19	printf(" Q to quit.\n");
20
21	return 0;
22	}
23
24	printf("Argument \"%s\" not recognized\n", args[1]);
25
26	help_info:
27	printf("Try \"-h\" or \"--help\" for more information\n");
28	return 1;
29	}
30
31
32	/* game settings */
33
34	speed game_speed = AVERAGE;
35	selected game_size = {WIDTH, HEIGHT};
36
37	score leader_board[SCORE_NUMBER] = {};
38
39	/* Handling Files to store settings & highscores */
40
41	char *env;
42	char *folder_path;
43
44	if ((env = getenv("XDG_DATA_HOME")) == NULL) {
45	if ((env = getenv("HOME")) == NULL) {
46	printf("are you ok?\n");
47	return 1;
48	}
49
50	uint8_t error = 0;
51
52	char local[] = "/.local";
53	char share[] = "/share";
54
55	folder_path = malloc(strlen(env) + strlen(local) +
56	strlen(share) + strlen(SETTINGS_FOLDER) + 2);
57
58	sprintf(folder_path, "%s%s", env, local);
59	error += make_folder(folder_path);
60
61	strcat(folder_path, share);
62	error += make_folder(folder_path);
63
64	if (error <= 1) {
65	printf("Failed to create Folder");
66	return 1;
67	}
68	} else {
69	folder_path = malloc(strlen(env) + strlen(SETTINGS_FOLDER) + 2);
70	sprintf(folder_path, "%s", env);
71	}
72
73	sprintf(folder_path + strlen(folder_path), "/%s", SETTINGS_FOLDER);
74	if (!make_folder(folder_path)) {
75	printf("Failed to create Folder");
76	return 1;
77	}
78
79	char *settings_path = malloc(strlen(folder_path) + strlen(SETTINGS_FILE) + 2);
80	sprintf(settings_path, "%s/%s", folder_path, SETTINGS_FILE);
81
82
83	{
84	FILE* setting_file = fopen(settings_path, "r");
85
86	if (setting_file != NULL) {
87
88	char setting_input[STRING_LEN];
89
90	fgets(setting_input, sizeof(setting_input), setting_file);
91	game_speed = string_to_num(setting_input, 0, SPEED_L - 1, game_speed);
92
93	fgets(setting_input, sizeof(setting_input), setting_file);
94	game_size.x = string_to_num(setting_input, MIN_SIZE, MAX_SIZE, game_size.x);
95
96	fgets(setting_input, sizeof(setting_input), setting_file);
97	game_size.y = string_to_num(setting_input, MIN_SIZE, MAX_SIZE, game_size.y);
98
99	fclose(setting_file);
100	}
101	}
102
103	char *score_path = malloc(strlen(folder_path) + strlen(SCORE_FILE) + 2);
104	sprintf(score_path, "%s/%s", folder_path, SCORE_FILE);
105
106	free(folder_path);
107
108	{
109	FILE* score_file = fopen(score_path, "r");
110
111	if (score_file != NULL) {
112
113	char score_input[STRING_LEN];
114
115	uint8_t i;
116	for (i = 0; i < SCORE_NUMBER; i++) {
117	fgets(score_input, sizeof(score_input), score_file);
118	if (score_input[0] != '\0') {
119	uint8_t j;
120	for(j = 0; score_input[j] != '\0'; j++) {
121	if (score_input[j] == '\n' \|\| score_input[j] == ' ' \|\| score_input[j] == '\t') {
122	score_input[j] = '\0';
123	break;
124	}
125	}
126	score_input[SCORE_LEN - 1] = '\0';
127	strncpy(leader_board[i].name, score_input, SCORE_LEN);
128	}
129
130	fgets(score_input, sizeof(score_input), score_file);
131	leader_board[i].points = string_to_num(score_input, 0, UINT16_MAX, leader_board[i].points);
132	}
133	fclose(score_file);
134	}
135	}
136
137	/* Setting up terminal with termios */
138
139	struct termios old, new;
140
141	tcgetattr(STDIN_FILENO, &old);
142
143	new = old;
144
145	new.c_lflag &= ~(ECHO \| ICANON);
146	new.c_cc[VMIN] = 0;
147	new.c_cc[VTIME] = 0;
148
149	tcsetattr(STDIN_FILENO, TCSANOW, &new);
150
151	srand(time(NULL));
152
153	printf("\033[?25l");
154
155	struct winsize init_size, current_size;
156	ioctl(STDOUT_FILENO, TIOCGWINSZ, &init_size);
157	current_size = init_size;
158	bool too_small = false;
159
160	bool gameloop = true;
161
162	/* Animation at the start */
163	if (!start_animation())
164	gameloop = false;
165
166
167	/* Menu */
168
169	bool menu = true;
170	main_menu setting = MAIN_MENU;
171	bool change_menu = true;
172
173	main_menu selected_menu = NEW_GAME;
174	settings selected_setting = HEIGHT_S;
175
176	uint16_t score = 0;
177
178	snake my_snake;
179	my_snake.position = NULL;
180
181	board_state **board = NULL;
182	board_state *values = NULL;
183
184
185	struct timespec mili100 = {0, 1000000 * 100};
186
187	while(gameloop) {
188
189	bool play_game = false;
190
191	while (menu) {
192
193	direction pressed_key = DIRECTIONS;
194
195	char string[STRING_LEN] = {};
196	ssize_t length_string = read(STDIN_FILENO, string, sizeof(string) - 1);
197
198
199	ioctl(STDOUT_FILENO, TIOCGWINSZ, &current_size);
200
201	if (current_size.ws_col != init_size.ws_col \|\|
202	current_size.ws_row != init_size.ws_row) {
203	init_size = current_size;
204	change_menu = true;
205	}
206
207
208	if (length_string > 0) {
209	string[length_string] = '\0';
210
211	pressed_key = read_direction(string, false);
212	}
213
214	if (pressed_key == Q_KEY \|\| pressed_key == ESCAPE) {
215	if (setting != MAIN_MENU) {
216	setting = MAIN_MENU;
217	change_menu = true;
218	} else {
219	gameloop = false;
220	break;
221	}
222	}
223
224
225	if (setting == MAIN_MENU) {
226
227	if (!too_small) {
228	switch (pressed_key) {
229	case UP:
230	selected_menu = (selected_menu + (MAIN_MENU - 1)) % MAIN_MENU;
231	change_menu = true;
232	break;
233	case DOWN:
234	selected_menu = (selected_menu + 1) % MAIN_MENU;
235	change_menu = true;
236	break;
237	default:
238	break;
239	}
240	}
241
242	if (change_menu) {
243	too_small = draw_menu(selected_menu, init_size);
244	change_menu = false;
245	}
246
247	if (pressed_key == ENTER && !too_small) {
248	switch (selected_menu) {
249	case NEW_GAME:
250	menu = false;
251	play_game = true;
252	break;
253	case SETTINGS:
254	setting = SETTINGS;
255	break;
256	case HIGHSCORE:
257	setting = HIGHSCORE;
258	break;
259	default:
260	menu = false;
261	gameloop = false;
262	break;
263	}
264	change_menu = true;
265	}
266
267	} else if (setting == SETTINGS) {
268
269	/* Settings Menu */
270
271	if (change_menu) {
272
273	draw_settings(selected_setting, game_speed, game_size, init_size);
274
275	change_menu = false;
276	}
277
278
279	if (pressed_key < DIRECTIONS) {
280
281	int8_t setting_change = 0;
282
283	switch (pressed_key) {
284	case UP:
285	selected_setting = (selected_setting + (SETTINGS_MENU - 1)) % SETTINGS_MENU;
286	break;
287	case DOWN:
288	selected_setting = (selected_setting + 1) % SETTINGS_MENU;
289	break;
290	case LEFT:
291	setting_change = 1;
292	break;
293	case RIGHT:
294	setting_change = -1;
295	break;
296	default:
297	break;
298	}
299
300	if (setting_change) {
301	switch (selected_setting) {
302	case SPEED_S:
303	if (
304	game_speed + setting_change <= SPEED_L - 1 &&
305	((int8_t) game_speed) + setting_change >= 0
306	) {
307	game_speed += setting_change;
308	}
309	break;
310	case WIDTH_S:
311	if (
312	game_size.x - setting_change >= MIN_SIZE &&
313	game_size.x - setting_change <= MAX_SIZE
314	) {
315	game_size.x -= setting_change;
316	}
317	break;
318	case HEIGHT_S:
319	if (
320	game_size.y - setting_change >= MIN_SIZE &&
321	game_size.y - setting_change <= MAX_SIZE
322	) {
323	game_size.y -= setting_change;
324	}
325	break;
326	default:
327	break;
328	}
329	}
330
331	change_menu = true;
332
333	}
334
335	if (pressed_key == ENTER) {
336	switch (selected_setting) {
337	case BACK_S:
338	setting = MAIN_MENU;
339	break;
340	default:
341	break;
342	}
343	change_menu = true;
344	}
345	} else if (setting == HIGHSCORE) {
346
347	if(change_menu) {
348	uint8_t i;
349
350	for (i = 0; i < SCORE_NUMBER; i++) {
351	if (score > leader_board[i].points)
352	break;
353	}
354
355	if (i < SCORE_NUMBER) {
356
357	uint8_t new_score = i;
358
359	for (i = SCORE_NUMBER - 1; i > new_score; i--) {
360	leader_board[i] = leader_board[i -1];
361	}
362
363	leader_board[new_score].points = score;
364	leader_board[new_score].name[0] = '\0';
365
366	draw_highscore (new_score, leader_board, init_size);
367
368	score = 0;
369	change_menu = true;
370
371	} else {
372	if (change_menu)
373	draw_highscore (-1, leader_board, init_size);
374	}
375	}
376
377	if(pressed_key == ENTER) {
378	setting = MAIN_MENU;
379	change_menu = true;
380	}
381	} else if(setting == NEW_GAME) {
382
383	if (change_menu)
384	draw_board(game_size, board, init_size, true, 2, score);
385
386	if(pressed_key == ENTER) {
387	setting = HIGHSCORE;
388	change_menu = true;
389
390	free(my_snake.position);
391	free(board);
392	free(values);
393	my_snake.position = NULL;
394	board = NULL;
395	values = NULL;
396	}
397	}
398
399	nanosleep(&mili100, NULL);
400	}
401
402	menu = true;
403
404	/* initialisation of the game */
405
406	if(play_game) {
407
408	bool run = true;
409
410	my_snake.length = STARTING_LENGTH;
411
412	my_snake.position = malloc((my_snake.length + 1) * sizeof(snake_part));
413
414	direction shift = RIGHT;
415	direction tmp_direction = shift;
416
417	{
418	uint16_t i;
419
420	my_snake.position[0].coords.y = game_size.y >> 1;
421	my_snake.position[0].coords.x = game_size.x >> 1;
422	my_snake.position[0].directions[0] = shift;
423	my_snake.position[0].directions[1] = shift;
424	for (i = 1; i <= my_snake.length; i++) {
425	my_snake.position[i].coords.y = -1;
426	my_snake.position[i].coords.x = -1;
427	}
428	}
429
430	board = malloc(game_size.y * sizeof(board_state*));
431	values = calloc(game_size.y * game_size.x, sizeof(board_state));
432
433	if(board == NULL \|\| values == NULL)
434	run = false;
435
436	{
437	uint8_t i;
438
439	for (i = 0; i < game_size.y; i++)
440	board[i] = values + i * game_size.x;
441	}
442
443	update_field(my_snake, game_size, board, true);
444
445	uint8_t paused = 0;
446
447
448	if ((too_small = draw_board(game_size, board, current_size, true, 0, score)))
449	paused = 1;
450
451
452	struct timespec milispeed = {0, 1000000 * (SPEED + game_speed * 25)};
453
454	/* start of the actual game loop */
455
456	while (run) {
457
458	/* input handling */
459
460
461	direction pressed_key;
462
463	char string[STRING_LEN] = {};
464	ssize_t length_string = read(STDIN_FILENO, string, sizeof(string) - 1);
465
466	if (length_string > 0) {
467	string[length_string] = '\0';
468
469	pressed_key = read_direction(string, true);
470
471	if (!too_small) {
472	if (pressed_key == P_KEY \|\| pressed_key == ENTER) {
473	paused = (paused == 1) ? 0 : 1;
474	if (paused)
475	draw_board(game_size, board, current_size, true, paused, score);
476	}
477
478	if (!paused && pressed_key < DIRECTIONS)
479	tmp_direction = pressed_key;
480	}
481
482	if (pressed_key == Q_KEY \|\| pressed_key == ESCAPE)
483	run = false;
484	}
485
486	/* game logic */
487
488	/*
489	struct timeval current;
490	gettimeofday(&current, NULL);*/
491
492	if (/time_diff >= SPEED 1000*/ true) {
493
494	ioctl(STDOUT_FILENO, TIOCGWINSZ, &current_size);
495
496	if (current_size.ws_col != init_size.ws_col \|\|
497	current_size.ws_row != init_size.ws_row) {
498	init_size = current_size;
499
500	paused = 1;
501	too_small = draw_board(game_size, board, current_size, true, paused, score);
502	}
503
504	if (!paused) {
505
506	if (tmp_direction < DIRECTIONS &&
507	((shift + (DIRECTIONS >> 1)) % DIRECTIONS) != tmp_direction) {
508	shift = tmp_direction;
509	}
510
511	uint8_t update = update_snake(game_size ,&my_snake, shift);
512
513	uint8_t head_y = my_snake.position[0].coords.y;
514	uint8_t head_x = my_snake.position[0].coords.x;
515
516	if (board[head_y][head_x] == FRUIT) {
517	my_snake.length++;
518	score += 1 +
519	(((MAX_SIZE >> 1) / (game_size.y) +
520	(MAX_SIZE >> 1) / (game_size.x) +
521	(my_snake.length - STARTING_LENGTH)) / (game_speed + 1));
522	snake_part tmp = realloc(my_snake.position, (my_snake.length + 1) sizeof(snake_part));
523	if (tmp == NULL) {
524	gameloop = false;
525	break;
526	}
527	my_snake.position = tmp;
528
529	my_snake.position[my_snake.length].coords.y = -1;
530	my_snake.position[my_snake.length].coords.x = -1;
531	}
532
533	update_field(my_snake, game_size, board, false);
534
535	draw_board(game_size, board, current_size, false, 0, score);
536
537	switch (update) {
538	case 0:
539	gameloop = false;
540	break;
541	case 2:
542	setting = NEW_GAME;
543	run = false;
544	break;
545	default:
546	break;
547	}
548
549	}
550	}
551	nanosleep(&milispeed, NULL);
552	}
553	}
554	}
555
556
557
558	free(my_snake.position);
559	free(board);
560	free(values);
561
562	tcsetattr(STDIN_FILENO, TCSANOW, &old);
563	printf("\033[?25h\n\n");
564
565	printf("\033[32m");
566	printf("\033[2J\033[H");
567
568
569	{
570	FILE* setting_file = fopen(settings_path, "w");
571
572	fprintf(setting_file, "%d\n%d\n%d", game_speed, game_size.x, game_size.y);
573
574	fclose(setting_file);
575
576	FILE* score_file = fopen(score_path, "w");
577	uint8_t i;
578
579	for (i = 0; i < SCORE_NUMBER; i++) {
580	fprintf(score_file, "%s\n%i\n", leader_board[i].name, leader_board[i].points);
581	}
582
583	fclose(score_file);
584	}
585
586	free(settings_path);
587	free(score_path);
588
589	return 0;
590	}