snake_c

public

Small snake game in C

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47 commits 2 branches 1 tag 0 releases565.5 KiB

#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] = {};
  uint16_t score = 0;

  /* 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;


  /* Animation at the start */
  if (!start_animation())
    goto end_of_program;


  /* Menu */

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

  main_menu selected_menu = NEW_GAME;
  settings selected_setting = HEIGHT_S;

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

menu_start:

  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)
      goto end_of_program;


    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;
          break;
        case SETTINGS:
          setting = SETTINGS;
          break;
        case HIGHSCORE:
          setting = HIGHSCORE;
          break;
        default:
          goto end_of_program; 
          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);
     
        } else {
          draw_highscore (-1, leader_board);    
        }
      }

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

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

  nanosleep(&mili100, NULL);
  }

  menu = true;

  /* initialisation of the game */

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

  if(board == NULL || values == NULL)
    goto end_of_program;

  {
    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;

  bool run = true;

  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)
            goto end_free;
          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: 
            goto end_free;
            break;
          case 2:
            setting = NEW_GAME;
            draw_board(game_size, board, current_size, false, 2, score);
            goto end_free;
            break;
          default:
            break;
        }

      }
    }
    nanosleep(&milispeed, NULL);
  }

end_free:

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

  if (setting == NEW_GAME)
    goto menu_start;

end_of_program:

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