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;
  }

  /* 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;


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


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

  /* game settings */

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

  /* Menu */

  bool menu = true;
  bool setting = false;
  bool change_menu = true;

  main_menu selected_menu = NEW_GAME;
  settings selected_setting = HEIGHT_S;

  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)
      goto end_of_program;


    if (!setting) {
      
      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 = true;
          change_menu = true;
          break;
        default:
          goto end_of_program; 
          break;
        }
      }

    } else {

      /* Settings Menu */

      if (change_menu) {
        
        draw_settings(selected_setting, game_speed, game_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 = false;
            break;
          default:
            break;
        }
        change_menu = true;
      }
    }

  nanosleep(&mili100, NULL);
  }


  /* 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);

  bool paused = false;

  uint16_t score = 0;

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


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

  bool run = true;

  /* start of the actual game loop */

  while (run) {

    /* input handling  */

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

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

        if (!too_small) {
          if (toupper(string[0]) == 'P' || string[0] == '\n') {
            paused = !paused;
            if (paused)
              draw_board(game_size, board, current_size, true, paused, score);
          }

          if (!paused)
            tmp_direction = read_direction(string, true);
        }

        if (toupper(string[0]) == 'Q')
          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 = true;
        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++;
          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, false, score);

        switch (update) {
          case 0: 
            printf("\nERROR\n");
            goto end_free;
            break;
          case 2:
            printf("\nHAHA LOST, LOSER");
            goto end_free;
            break;
          default:
            break;
        }

      }
    }
    nanosleep(&milispeed, NULL);
  }

end_free:

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

end_of_program:

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


  printf("\033[32m");
  printf("\n\nYour score: %5d", score);
  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	/* Setting up terminal with termios */
32
33	struct termios old, new;
34
35	tcgetattr(STDIN_FILENO, &old);
36
37	new = old;
38
39	new.c_lflag &= ~(ECHO \| ICANON);
40	new.c_cc[VMIN] = 0;
41	new.c_cc[VTIME] = 0;
42
43	tcsetattr(STDIN_FILENO, TCSANOW, &new);
44
45	srand(time(NULL));
46
47	printf("\033[?25l");
48
49	struct winsize init_size, current_size;
50	ioctl(STDOUT_FILENO, TIOCGWINSZ, &init_size);
51	current_size = init_size;
52	bool too_small = false;
53
54
55	struct timespec mili100 = {0, 1000000 * 100};
56
57
58	/* Animation at the start */
59	if (!start_animation())
60	goto end_of_program;
61
62	/* game settings */
63
64	speed game_speed = AVERAGE;
65	selected game_size = {WIDTH, HEIGHT};
66
67	/* Menu */
68
69	bool menu = true;
70	bool setting = false;
71	bool change_menu = true;
72
73	main_menu selected_menu = NEW_GAME;
74	settings selected_setting = HEIGHT_S;
75
76	while (menu) {
77
78	direction pressed_key = DIRECTIONS;
79
80	char string[STRING_LEN] = {};
81	ssize_t length_string = read(STDIN_FILENO, string, sizeof(string) - 1);
82
83
84	ioctl(STDOUT_FILENO, TIOCGWINSZ, &current_size);
85
86	if (current_size.ws_col != init_size.ws_col \|\|
87	current_size.ws_row != init_size.ws_row) {
88	init_size = current_size;
89	change_menu = true;
90	}
91
92
93	if (length_string > 0) {
94	string[length_string] = '\0';
95
96	pressed_key = read_direction(string, false);
97	}
98
99	if (pressed_key == Q_KEY)
100	goto end_of_program;
101
102
103	if (!setting) {
104
105	if (!too_small) {
106	switch (pressed_key) {
107	case UP:
108	selected_menu = (selected_menu + (MAIN_MENU - 1)) % MAIN_MENU;
109	change_menu = true;
110	break;
111	case DOWN:
112	selected_menu = (selected_menu + 1) % MAIN_MENU;
113	change_menu = true;
114	break;
115	default:
116	break;
117	}
118	}
119
120	if (change_menu) {
121	too_small = draw_menu(selected_menu, init_size);
122	change_menu = false;
123	}
124
125	if (pressed_key == ENTER && !too_small) {
126	switch (selected_menu) {
127	case NEW_GAME:
128	menu = false;
129	break;
130	case SETTINGS:
131	setting = true;
132	change_menu = true;
133	break;
134	default:
135	goto end_of_program;
136	break;
137	}
138	}
139
140	} else {
141
142	/* Settings Menu */
143
144	if (change_menu) {
145
146	draw_settings(selected_setting, game_speed, game_size);
147
148	change_menu = false;
149	}
150
151
152	if (pressed_key < DIRECTIONS) {
153
154	int8_t setting_change = 0;
155
156	switch (pressed_key) {
157	case UP:
158	selected_setting = (selected_setting + (SETTINGS_MENU - 1)) % SETTINGS_MENU;
159	break;
160	case DOWN:
161	selected_setting = (selected_setting + 1) % SETTINGS_MENU;
162	break;
163	case LEFT:
164	setting_change = 1;
165	break;
166	case RIGHT:
167	setting_change = -1;
168	break;
169	default:
170	break;
171	}
172
173	if (setting_change) {
174	switch (selected_setting) {
175	case SPEED_S:
176	if (
177	game_speed + setting_change <= SPEED_L - 1 &&
178	((int8_t) game_speed) + setting_change >= 0
179	) {
180	game_speed += setting_change;
181	}
182	break;
183	case WIDTH_S:
184	if (
185	game_size.x - setting_change >= MIN_SIZE &&
186	game_size.x - setting_change <= MAX_SIZE
187	) {
188	game_size.x -= setting_change;
189	}
190	break;
191	case HEIGHT_S:
192	if (
193	game_size.y - setting_change >= MIN_SIZE &&
194	game_size.y - setting_change <= MAX_SIZE
195	) {
196	game_size.y -= setting_change;
197	}
198	break;
199	default:
200	break;
201	}
202	}
203
204	change_menu = true;
205
206	}
207
208	if (pressed_key == ENTER) {
209	switch (selected_setting) {
210	case BACK_S:
211	setting = false;
212	break;
213	default:
214	break;
215	}
216	change_menu = true;
217	}
218	}
219
220	nanosleep(&mili100, NULL);
221	}
222
223
224	/* initialisation of the game */
225
226	snake my_snake;
227	my_snake.length = STARTING_LENGTH;
228
229	my_snake.position = malloc((my_snake.length + 1) * sizeof(snake_part));
230
231	direction shift = RIGHT;
232	direction tmp_direction = shift;
233
234	{
235	uint16_t i;
236
237	my_snake.position[0].coords.y = game_size.y >> 1;
238	my_snake.position[0].coords.x = game_size.x >> 1;
239	my_snake.position[0].directions[0] = shift;
240	my_snake.position[0].directions[1] = shift;
241	for (i = 1; i <= my_snake.length; i++) {
242	my_snake.position[i].coords.y = -1;
243	my_snake.position[i].coords.x = -1;
244	}
245	}
246
247	board_state *board = malloc(game_size.y sizeof(board_state*));
248	board_state values = calloc(game_size.y game_size.x, sizeof(board_state));
249
250	if(board == NULL \|\| values == NULL)
251	goto end_of_program;
252
253	{
254	uint8_t i;
255
256	for (i = 0; i < game_size.y; i++)
257	board[i] = values + i * game_size.x;
258	}
259
260	update_field(my_snake, game_size, board, true);
261
262	bool paused = false;
263
264	uint16_t score = 0;
265
266	if ((too_small = draw_board(game_size, board, current_size, true, false, score)))
267	paused = true;
268
269
270	struct timespec milispeed = {0, 1000000 * (SPEED + game_speed * 25)};
271
272	bool run = true;
273
274	/* start of the actual game loop */
275
276	while (run) {
277
278	/* input handling */
279
280
281	char string[STRING_LEN] = {};
282	ssize_t length_string = read(STDIN_FILENO, string, sizeof(string) - 1);
283
284	if (length_string > 0) {
285	string[length_string] = '\0';
286
287	if (!too_small) {
288	if (toupper(string[0]) == 'P' \|\| string[0] == '\n') {
289	paused = !paused;
290	if (paused)
291	draw_board(game_size, board, current_size, true, paused, score);
292	}
293
294	if (!paused)
295	tmp_direction = read_direction(string, true);
296	}
297
298	if (toupper(string[0]) == 'Q')
299	run = false;
300	}
301
302
303	/* game logic */
304
305	/*
306	struct timeval current;
307	gettimeofday(&current, NULL);*/
308
309	if (/time_diff >= SPEED 1000*/ true) {
310
311	ioctl(STDOUT_FILENO, TIOCGWINSZ, &current_size);
312
313	if (current_size.ws_col != init_size.ws_col \|\|
314	current_size.ws_row != init_size.ws_row) {
315	init_size = current_size;
316
317	paused = true;
318	too_small = draw_board(game_size, board, current_size, true, paused, score);
319	}
320
321	if (!paused) {
322
323	if (tmp_direction < DIRECTIONS &&
324	((shift + (DIRECTIONS >> 1)) % DIRECTIONS) != tmp_direction) {
325	shift = tmp_direction;
326	}
327
328	uint8_t update = update_snake(game_size ,&my_snake, shift);
329
330	uint8_t head_y = my_snake.position[0].coords.y;
331	uint8_t head_x = my_snake.position[0].coords.x;
332
333	if (board[head_y][head_x] == FRUIT) {
334	my_snake.length++;
335	score++;
336	snake_part tmp = realloc(my_snake.position, (my_snake.length + 1) sizeof(snake_part));
337	if (tmp == NULL)
338	goto end_free;
339	my_snake.position = tmp;
340
341	my_snake.position[my_snake.length].coords.y = -1;
342	my_snake.position[my_snake.length].coords.x = -1;
343	}
344
345	update_field(my_snake, game_size, board, false);
346
347	draw_board(game_size, board, current_size, false, false, score);
348
349	switch (update) {
350	case 0:
351	printf("\nERROR\n");
352	goto end_free;
353	break;
354	case 2:
355	printf("\nHAHA LOST, LOSER");
356	goto end_free;
357	break;
358	default:
359	break;
360	}
361
362	}
363	}
364	nanosleep(&milispeed, NULL);
365	}
366
367	end_free:
368
369	free(my_snake.position);
370	free(board);
371	free(values);
372
373	end_of_program:
374
375	tcsetattr(STDIN_FILENO, TCSANOW, &old);
376	printf("\033[?25h\n\n");
377
378
379	printf("\033[32m");
380	printf("\n\nYour score: %5d", score);
381	return 0;
382	}