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

  
    uint8_t error = 0;

    snprintf(file_path, sizeof(file_path), "%s/%s", env, local);
    error += make_folder(file_path);

    snprintf(file_path, sizeof(file_path), "%s/%s/%s", env, local, share);
    error += make_folder(file_path);

    if (error <= 1) {
      printf("Failed to create Folder");
      return 1;
    }

    snprintf(file_path, sizeof(file_path), "%s/%s/%s/%s", env, local, share, SETTING_FILE);
    
  } 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
42	if ((env = getenv("XDG_DATA_HOME")) == NULL) {
43	if ((env = getenv("HOME")) == NULL) {
44	printf("are you ok?\n");
45	return 1;
46	}
47
48	char local[] = ".local";
49	char share[] = "share";
50
51
52	uint8_t error = 0;
53
54	snprintf(file_path, sizeof(file_path), "%s/%s", env, local);
55	error += make_folder(file_path);
56
57	snprintf(file_path, sizeof(file_path), "%s/%s/%s", env, local, share);
58	error += make_folder(file_path);
59
60	if (error <= 1) {
61	printf("Failed to create Folder");
62	return 1;
63	}
64
65	snprintf(file_path, sizeof(file_path), "%s/%s/%s/%s", env, local, share, SETTING_FILE);
66
67	} else {
68	snprintf(file_path, sizeof(file_path), "%s/%s", env, SETTING_FILE);
69	}
70
71	{
72	FILE* setting_file = fopen(file_path, "r");
73
74	if (setting_file != NULL) {
75
76	char setting_input[STRING_LEN];
77	char *endptr;
78
79	fgets(setting_input, sizeof(setting_input), setting_file);
80
81	int32_t number = strtol(setting_input, &endptr, 10);
82
83	if (setting_input != endptr) {
84	if (number >= 0 && number < SPEED_L)
85	game_speed = number;
86	}
87
88
89	fgets(setting_input, sizeof(setting_input), setting_file);
90
91	number = strtol(setting_input, &endptr, 10);
92
93	if (setting_input != endptr) {
94	if (number >= MIN_SIZE && number <= MAX_SIZE)
95	game_size.x = number;
96	}
97
98
99	fgets(setting_input, sizeof(setting_input), setting_file);
100
101	number = strtol(setting_input, &endptr, 10);
102
103	if (setting_input != endptr) {
104	if (number >= MIN_SIZE && number <= MAX_SIZE)
105	game_size.y = number;
106	}
107
108	fclose(setting_file);
109	}
110	}
111
112	/* Setting up terminal with termios */
113
114	struct termios old, new;
115
116	tcgetattr(STDIN_FILENO, &old);
117
118	new = old;
119
120	new.c_lflag &= ~(ECHO \| ICANON);
121	new.c_cc[VMIN] = 0;
122	new.c_cc[VTIME] = 0;
123
124	tcsetattr(STDIN_FILENO, TCSANOW, &new);
125
126	srand(time(NULL));
127
128	printf("\033[?25l");
129
130	struct winsize init_size, current_size;
131	ioctl(STDOUT_FILENO, TIOCGWINSZ, &init_size);
132	current_size = init_size;
133	bool too_small = false;
134
135
136	struct timespec mili100 = {0, 1000000 * 100};
137
138
139	/* Animation at the start */
140	if (!start_animation())
141	goto end_of_program;
142
143
144	/* Menu */
145
146	bool menu = true;
147	bool setting = false;
148	bool change_menu = true;
149
150	main_menu selected_menu = NEW_GAME;
151	settings selected_setting = HEIGHT_S;
152
153	while (menu) {
154
155	direction pressed_key = DIRECTIONS;
156
157	char string[STRING_LEN] = {};
158	ssize_t length_string = read(STDIN_FILENO, string, sizeof(string) - 1);
159
160
161	ioctl(STDOUT_FILENO, TIOCGWINSZ, &current_size);
162
163	if (current_size.ws_col != init_size.ws_col \|\|
164	current_size.ws_row != init_size.ws_row) {
165	init_size = current_size;
166	change_menu = true;
167	}
168
169
170	if (length_string > 0) {
171	string[length_string] = '\0';
172
173	pressed_key = read_direction(string, false);
174	}
175
176	if (pressed_key == Q_KEY)
177	goto end_of_program;
178
179
180	if (!setting) {
181
182	if (!too_small) {
183	switch (pressed_key) {
184	case UP:
185	selected_menu = (selected_menu + (MAIN_MENU - 1)) % MAIN_MENU;
186	change_menu = true;
187	break;
188	case DOWN:
189	selected_menu = (selected_menu + 1) % MAIN_MENU;
190	change_menu = true;
191	break;
192	default:
193	break;
194	}
195	}
196
197	if (change_menu) {
198	too_small = draw_menu(selected_menu, init_size);
199	change_menu = false;
200	}
201
202	if (pressed_key == ENTER && !too_small) {
203	switch (selected_menu) {
204	case NEW_GAME:
205	menu = false;
206	break;
207	case SETTINGS:
208	setting = true;
209	change_menu = true;
210	break;
211	default:
212	goto end_of_program;
213	break;
214	}
215	}
216
217	} else {
218
219	/* Settings Menu */
220
221	if (change_menu) {
222
223	draw_settings(selected_setting, game_speed, game_size);
224
225	change_menu = false;
226	}
227
228
229	if (pressed_key < DIRECTIONS) {
230
231	int8_t setting_change = 0;
232
233	switch (pressed_key) {
234	case UP:
235	selected_setting = (selected_setting + (SETTINGS_MENU - 1)) % SETTINGS_MENU;
236	break;
237	case DOWN:
238	selected_setting = (selected_setting + 1) % SETTINGS_MENU;
239	break;
240	case LEFT:
241	setting_change = 1;
242	break;
243	case RIGHT:
244	setting_change = -1;
245	break;
246	default:
247	break;
248	}
249
250	if (setting_change) {
251	switch (selected_setting) {
252	case SPEED_S:
253	if (
254	game_speed + setting_change <= SPEED_L - 1 &&
255	((int8_t) game_speed) + setting_change >= 0
256	) {
257	game_speed += setting_change;
258	}
259	break;
260	case WIDTH_S:
261	if (
262	game_size.x - setting_change >= MIN_SIZE &&
263	game_size.x - setting_change <= MAX_SIZE
264	) {
265	game_size.x -= setting_change;
266	}
267	break;
268	case HEIGHT_S:
269	if (
270	game_size.y - setting_change >= MIN_SIZE &&
271	game_size.y - setting_change <= MAX_SIZE
272	) {
273	game_size.y -= setting_change;
274	}
275	break;
276	default:
277	break;
278	}
279	}
280
281	change_menu = true;
282
283	}
284
285	if (pressed_key == ENTER) {
286	switch (selected_setting) {
287	case BACK_S:
288	setting = false;
289	break;
290	default:
291	break;
292	}
293	change_menu = true;
294	}
295	}
296
297	nanosleep(&mili100, NULL);
298	}
299
300	/* initialisation of the game */
301
302	snake my_snake;
303	my_snake.length = STARTING_LENGTH;
304
305	my_snake.position = malloc((my_snake.length + 1) * sizeof(snake_part));
306
307	direction shift = RIGHT;
308	direction tmp_direction = shift;
309
310	{
311	uint16_t i;
312
313	my_snake.position[0].coords.y = game_size.y >> 1;
314	my_snake.position[0].coords.x = game_size.x >> 1;
315	my_snake.position[0].directions[0] = shift;
316	my_snake.position[0].directions[1] = shift;
317	for (i = 1; i <= my_snake.length; i++) {
318	my_snake.position[i].coords.y = -1;
319	my_snake.position[i].coords.x = -1;
320	}
321	}
322
323	board_state *board = malloc(game_size.y sizeof(board_state*));
324	board_state values = calloc(game_size.y game_size.x, sizeof(board_state));
325
326	if(board == NULL \|\| values == NULL)
327	goto end_of_program;
328
329	{
330	uint8_t i;
331
332	for (i = 0; i < game_size.y; i++)
333	board[i] = values + i * game_size.x;
334	}
335
336	update_field(my_snake, game_size, board, true);
337
338	bool paused = false;
339
340	uint16_t score = 0;
341
342	if ((too_small = draw_board(game_size, board, current_size, true, false, score)))
343	paused = true;
344
345
346	struct timespec milispeed = {0, 1000000 * (SPEED + game_speed * 25)};
347
348	bool run = true;
349
350	/* start of the actual game loop */
351
352	while (run) {
353
354	/* input handling */
355
356
357	char string[STRING_LEN] = {};
358	ssize_t length_string = read(STDIN_FILENO, string, sizeof(string) - 1);
359
360	if (length_string > 0) {
361	string[length_string] = '\0';
362
363	if (!too_small) {
364	if (toupper(string[0]) == 'P' \|\| string[0] == '\n') {
365	paused = !paused;
366	if (paused)
367	draw_board(game_size, board, current_size, true, paused, score);
368	}
369
370	if (!paused)
371	tmp_direction = read_direction(string, true);
372	}
373
374	if (toupper(string[0]) == 'Q')
375	run = false;
376	}
377
378
379	/* game logic */
380
381	/*
382	struct timeval current;
383	gettimeofday(&current, NULL);*/
384
385	if (/time_diff >= SPEED 1000*/ true) {
386
387	ioctl(STDOUT_FILENO, TIOCGWINSZ, &current_size);
388
389	if (current_size.ws_col != init_size.ws_col \|\|
390	current_size.ws_row != init_size.ws_row) {
391	init_size = current_size;
392
393	paused = true;
394	too_small = draw_board(game_size, board, current_size, true, paused, score);
395	}
396
397	if (!paused) {
398
399	if (tmp_direction < DIRECTIONS &&
400	((shift + (DIRECTIONS >> 1)) % DIRECTIONS) != tmp_direction) {
401	shift = tmp_direction;
402	}
403
404	uint8_t update = update_snake(game_size ,&my_snake, shift);
405
406	uint8_t head_y = my_snake.position[0].coords.y;
407	uint8_t head_x = my_snake.position[0].coords.x;
408
409	if (board[head_y][head_x] == FRUIT) {
410	my_snake.length++;
411	score += 1 +
412	(((MAX_SIZE >> 1) / (game_size.y) +
413	(MAX_SIZE >> 1) / (game_size.x) +
414	(my_snake.length - STARTING_LENGTH)) / (game_speed + 1));
415	snake_part tmp = realloc(my_snake.position, (my_snake.length + 1) sizeof(snake_part));
416	if (tmp == NULL)
417	goto end_free;
418	my_snake.position = tmp;
419
420	my_snake.position[my_snake.length].coords.y = -1;
421	my_snake.position[my_snake.length].coords.x = -1;
422	}
423
424	update_field(my_snake, game_size, board, false);
425
426	draw_board(game_size, board, current_size, false, false, score);
427
428	switch (update) {
429	case 0:
430	printf("\nERROR\n");
431	goto end_free;
432	break;
433	case 2:
434	printf("\nHAHA LOST, LOSER");
435	goto end_free;
436	break;
437	default:
438	break;
439	}
440
441	}
442	}
443	nanosleep(&milispeed, NULL);
444	}
445
446	end_free:
447
448	free(my_snake.position);
449	free(board);
450	free(values);
451
452	end_of_program:
453
454	tcsetattr(STDIN_FILENO, TCSANOW, &old);
455	printf("\033[?25h\n\n");
456
457	printf("\033[32m");
458	printf("\033[2J\033[H");
459
460
461	{
462	FILE* setting_file = fopen(file_path, "w");
463
464	fprintf(setting_file, "%d\n%d\n%d", game_speed, game_size.x, game_size.y);
465	}
466
467	return 0;
468	}