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};


  char *env;
  char file_path[PATH_LEN];

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

    if (
      !make_folder(file_path, ".local", true) ||
    ) {
      printf("Couldn't create folder\n");
      return 1;
    }
   
    if (
      !make_folder(file_path, "share", true)
    ) {
      printf("Couldn't create folder\n");
      return 1;
    }

    make_folder(file_path, SETTING_FILE , false);
  
  } else {
    snprintf(file_path, sizeof(file_path), "%s/%s", env, SETTING_FILE);
  }

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

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

      fgets(setting_input, sizeof(setting_input), setting_file);

      int32_t number = strtol(setting_input, &endptr, 10);

      if (setting_input != endptr) {
        if (number >= 0 && number < SPEED_L)
          game_speed = number;
      }


      fgets(setting_input, sizeof(setting_input), setting_file);

      number = strtol(setting_input, &endptr, 10);

      if (setting_input != endptr) {
        if (number >= MIN_SIZE && number <= MAX_SIZE)
          game_size.x = number;
      }


      fgets(setting_input, sizeof(setting_input), setting_file);

      number = strtol(setting_input, &endptr, 10);

      if (setting_input != endptr) {
        if (number >= MIN_SIZE && number <= MAX_SIZE)
          game_size.y = number;
      }

      fclose(setting_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;


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


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


  /* 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 += 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, 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("\033[2J\033[H");


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

    fprintf(setting_file, "%d\n%d\n%d", game_speed, game_size.x, game_size.y);
  }
  
  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
38	char *env;
39	char file_path[PATH_LEN];
40
41	if ((env = getenv("XDG_DATA_HOME")) == NULL) {
42	if ((env = getenv("HOME")) == NULL) {
43	printf("are you ok?\n");
44	return 1;
45	}
46
47	if (
48	!make_folder(file_path, ".local", true) \|\|
49	) {
50	printf("Couldn't create folder\n");
51	return 1;
52	}
53
54	if (
55	!make_folder(file_path, "share", true)
56	) {
57	printf("Couldn't create folder\n");
58	return 1;
59	}
60
61	make_folder(file_path, SETTING_FILE , false);
62
63	} else {
64	snprintf(file_path, sizeof(file_path), "%s/%s", env, SETTING_FILE);
65	}
66
67	{
68	FILE* setting_file = fopen(file_path, "r");
69
70	if (setting_file != NULL) {
71
72	char setting_input[STRING_LEN];
73	char *endptr;
74
75	fgets(setting_input, sizeof(setting_input), setting_file);
76
77	int32_t number = strtol(setting_input, &endptr, 10);
78
79	if (setting_input != endptr) {
80	if (number >= 0 && number < SPEED_L)
81	game_speed = number;
82	}
83
84
85	fgets(setting_input, sizeof(setting_input), setting_file);
86
87	number = strtol(setting_input, &endptr, 10);
88
89	if (setting_input != endptr) {
90	if (number >= MIN_SIZE && number <= MAX_SIZE)
91	game_size.x = number;
92	}
93
94
95	fgets(setting_input, sizeof(setting_input), setting_file);
96
97	number = strtol(setting_input, &endptr, 10);
98
99	if (setting_input != endptr) {
100	if (number >= MIN_SIZE && number <= MAX_SIZE)
101	game_size.y = number;
102	}
103
104	fclose(setting_file);
105	}
106	}
107
108	/* Setting up terminal with termios */
109
110	struct termios old, new;
111
112	tcgetattr(STDIN_FILENO, &old);
113
114	new = old;
115
116	new.c_lflag &= ~(ECHO \| ICANON);
117	new.c_cc[VMIN] = 0;
118	new.c_cc[VTIME] = 0;
119
120	tcsetattr(STDIN_FILENO, TCSANOW, &new);
121
122	srand(time(NULL));
123
124	printf("\033[?25l");
125
126	struct winsize init_size, current_size;
127	ioctl(STDOUT_FILENO, TIOCGWINSZ, &init_size);
128	current_size = init_size;
129	bool too_small = false;
130
131
132	struct timespec mili100 = {0, 1000000 * 100};
133
134
135	/* Animation at the start */
136	if (!start_animation())
137	goto end_of_program;
138
139
140	/* Menu */
141
142	bool menu = true;
143	bool setting = false;
144	bool change_menu = true;
145
146	main_menu selected_menu = NEW_GAME;
147	settings selected_setting = HEIGHT_S;
148
149	while (menu) {
150
151	direction pressed_key = DIRECTIONS;
152
153	char string[STRING_LEN] = {};
154	ssize_t length_string = read(STDIN_FILENO, string, sizeof(string) - 1);
155
156
157	ioctl(STDOUT_FILENO, TIOCGWINSZ, &current_size);
158
159	if (current_size.ws_col != init_size.ws_col \|\|
160	current_size.ws_row != init_size.ws_row) {
161	init_size = current_size;
162	change_menu = true;
163	}
164
165
166	if (length_string > 0) {
167	string[length_string] = '\0';
168
169	pressed_key = read_direction(string, false);
170	}
171
172	if (pressed_key == Q_KEY)
173	goto end_of_program;
174
175
176	if (!setting) {
177
178	if (!too_small) {
179	switch (pressed_key) {
180	case UP:
181	selected_menu = (selected_menu + (MAIN_MENU - 1)) % MAIN_MENU;
182	change_menu = true;
183	break;
184	case DOWN:
185	selected_menu = (selected_menu + 1) % MAIN_MENU;
186	change_menu = true;
187	break;
188	default:
189	break;
190	}
191	}
192
193	if (change_menu) {
194	too_small = draw_menu(selected_menu, init_size);
195	change_menu = false;
196	}
197
198	if (pressed_key == ENTER && !too_small) {
199	switch (selected_menu) {
200	case NEW_GAME:
201	menu = false;
202	break;
203	case SETTINGS:
204	setting = true;
205	change_menu = true;
206	break;
207	default:
208	goto end_of_program;
209	break;
210	}
211	}
212
213	} else {
214
215	/* Settings Menu */
216
217	if (change_menu) {
218
219	draw_settings(selected_setting, game_speed, game_size);
220
221	change_menu = false;
222	}
223
224
225	if (pressed_key < DIRECTIONS) {
226
227	int8_t setting_change = 0;
228
229	switch (pressed_key) {
230	case UP:
231	selected_setting = (selected_setting + (SETTINGS_MENU - 1)) % SETTINGS_MENU;
232	break;
233	case DOWN:
234	selected_setting = (selected_setting + 1) % SETTINGS_MENU;
235	break;
236	case LEFT:
237	setting_change = 1;
238	break;
239	case RIGHT:
240	setting_change = -1;
241	break;
242	default:
243	break;
244	}
245
246	if (setting_change) {
247	switch (selected_setting) {
248	case SPEED_S:
249	if (
250	game_speed + setting_change <= SPEED_L - 1 &&
251	((int8_t) game_speed) + setting_change >= 0
252	) {
253	game_speed += setting_change;
254	}
255	break;
256	case WIDTH_S:
257	if (
258	game_size.x - setting_change >= MIN_SIZE &&
259	game_size.x - setting_change <= MAX_SIZE
260	) {
261	game_size.x -= setting_change;
262	}
263	break;
264	case HEIGHT_S:
265	if (
266	game_size.y - setting_change >= MIN_SIZE &&
267	game_size.y - setting_change <= MAX_SIZE
268	) {
269	game_size.y -= setting_change;
270	}
271	break;
272	default:
273	break;
274	}
275	}
276
277	change_menu = true;
278
279	}
280
281	if (pressed_key == ENTER) {
282	switch (selected_setting) {
283	case BACK_S:
284	setting = false;
285	break;
286	default:
287	break;
288	}
289	change_menu = true;
290	}
291	}
292
293	nanosleep(&mili100, NULL);
294	}
295
296	/* initialisation of the game */
297
298	snake my_snake;
299	my_snake.length = STARTING_LENGTH;
300
301	my_snake.position = malloc((my_snake.length + 1) * sizeof(snake_part));
302
303	direction shift = RIGHT;
304	direction tmp_direction = shift;
305
306	{
307	uint16_t i;
308
309	my_snake.position[0].coords.y = game_size.y >> 1;
310	my_snake.position[0].coords.x = game_size.x >> 1;
311	my_snake.position[0].directions[0] = shift;
312	my_snake.position[0].directions[1] = shift;
313	for (i = 1; i <= my_snake.length; i++) {
314	my_snake.position[i].coords.y = -1;
315	my_snake.position[i].coords.x = -1;
316	}
317	}
318
319	board_state *board = malloc(game_size.y sizeof(board_state*));
320	board_state values = calloc(game_size.y game_size.x, sizeof(board_state));
321
322	if(board == NULL \|\| values == NULL)
323	goto end_of_program;
324
325	{
326	uint8_t i;
327
328	for (i = 0; i < game_size.y; i++)
329	board[i] = values + i * game_size.x;
330	}
331
332	update_field(my_snake, game_size, board, true);
333
334	bool paused = false;
335
336	uint16_t score = 0;
337
338	if ((too_small = draw_board(game_size, board, current_size, true, false, score)))
339	paused = true;
340
341
342	struct timespec milispeed = {0, 1000000 * (SPEED + game_speed * 25)};
343
344	bool run = true;
345
346	/* start of the actual game loop */
347
348	while (run) {
349
350	/* input handling */
351
352
353	char string[STRING_LEN] = {};
354	ssize_t length_string = read(STDIN_FILENO, string, sizeof(string) - 1);
355
356	if (length_string > 0) {
357	string[length_string] = '\0';
358
359	if (!too_small) {
360	if (toupper(string[0]) == 'P' \|\| string[0] == '\n') {
361	paused = !paused;
362	if (paused)
363	draw_board(game_size, board, current_size, true, paused, score);
364	}
365
366	if (!paused)
367	tmp_direction = read_direction(string, true);
368	}
369
370	if (toupper(string[0]) == 'Q')
371	run = false;
372	}
373
374
375	/* game logic */
376
377	/*
378	struct timeval current;
379	gettimeofday(&current, NULL);*/
380
381	if (/time_diff >= SPEED 1000*/ true) {
382
383	ioctl(STDOUT_FILENO, TIOCGWINSZ, &current_size);
384
385	if (current_size.ws_col != init_size.ws_col \|\|
386	current_size.ws_row != init_size.ws_row) {
387	init_size = current_size;
388
389	paused = true;
390	too_small = draw_board(game_size, board, current_size, true, paused, score);
391	}
392
393	if (!paused) {
394
395	if (tmp_direction < DIRECTIONS &&
396	((shift + (DIRECTIONS >> 1)) % DIRECTIONS) != tmp_direction) {
397	shift = tmp_direction;
398	}
399
400	uint8_t update = update_snake(game_size ,&my_snake, shift);
401
402	uint8_t head_y = my_snake.position[0].coords.y;
403	uint8_t head_x = my_snake.position[0].coords.x;
404
405	if (board[head_y][head_x] == FRUIT) {
406	my_snake.length++;
407	score += 1 +
408	(((MAX_SIZE >> 1) / (game_size.y) +
409	(MAX_SIZE >> 1) / (game_size.x) +
410	(my_snake.length - STARTING_LENGTH)) / (game_speed + 1));
411	snake_part tmp = realloc(my_snake.position, (my_snake.length + 1) sizeof(snake_part));
412	if (tmp == NULL)
413	goto end_free;
414	my_snake.position = tmp;
415
416	my_snake.position[my_snake.length].coords.y = -1;
417	my_snake.position[my_snake.length].coords.x = -1;
418	}
419
420	update_field(my_snake, game_size, board, false);
421
422	draw_board(game_size, board, current_size, false, false, score);
423
424	switch (update) {
425	case 0:
426	printf("\nERROR\n");
427	goto end_free;
428	break;
429	case 2:
430	printf("\nHAHA LOST, LOSER");
431	goto end_free;
432	break;
433	default:
434	break;
435	}
436
437	}
438	}
439	nanosleep(&milispeed, NULL);
440	}
441
442	end_free:
443
444	free(my_snake.position);
445	free(board);
446	free(values);
447
448	end_of_program:
449
450	tcsetattr(STDIN_FILENO, TCSANOW, &old);
451	printf("\033[?25h\n\n");
452
453	printf("\033[32m");
454	printf("\033[2J\033[H");
455
456
457	{
458	FILE* setting_file = fopen(file_path, "w");
459
460	fprintf(setting_file, "%d\n%d\n%d", game_speed, game_size.x, game_size.y);
461	}
462
463	return 0;
464	}