snake_c

public

Small snake game in C

Star0

Watch0

35 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};


  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;
    }
   
    errno = 0;
    snprintf(file_path, sizeof(file_path), "%s/.local", env);
    if (mkdir(file_path, 0755) && errno != EEXIST) {
      printf("couldn't create folder");
      return 1;
    }

    errno = 0;
    snprintf(file_path, sizeof(file_path), "%s/.local/share", env);
    if (mkdir(file_path, 0755) && errno != EEXIST) {
      printf("couldn't create folder");
      return 1;
    }
  }

  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	errno = 0;
48	snprintf(file_path, sizeof(file_path), "%s/.local", env);
49	if (mkdir(file_path, 0755) && errno != EEXIST) {
50	printf("couldn't create folder");
51	return 1;
52	}
53
54	errno = 0;
55	snprintf(file_path, sizeof(file_path), "%s/.local/share", env);
56	if (mkdir(file_path, 0755) && errno != EEXIST) {
57	printf("couldn't create folder");
58	return 1;
59	}
60	}
61
62	snprintf(file_path, sizeof(file_path), "%s/%s", env, SETTING_FILE);
63
64	{
65	FILE* setting_file = fopen(file_path, "r");
66
67	if (setting_file != NULL) {
68
69	char setting_input[STRING_LEN];
70	char *endptr;
71
72	fgets(setting_input, sizeof(setting_input), setting_file);
73
74	int32_t number = strtol(setting_input, &endptr, 10);
75
76	if (setting_input != endptr) {
77	if (number >= 0 && number < SPEED_L)
78	game_speed = number;
79	}
80
81
82	fgets(setting_input, sizeof(setting_input), setting_file);
83
84	number = strtol(setting_input, &endptr, 10);
85
86	if (setting_input != endptr) {
87	if (number >= MIN_SIZE && number <= MAX_SIZE)
88	game_size.x = number;
89	}
90
91
92	fgets(setting_input, sizeof(setting_input), setting_file);
93
94	number = strtol(setting_input, &endptr, 10);
95
96	if (setting_input != endptr) {
97	if (number >= MIN_SIZE && number <= MAX_SIZE)
98	game_size.y = number;
99	}
100
101	fclose(setting_file);
102	}
103	}
104
105	/* Setting up terminal with termios */
106
107	struct termios old, new;
108
109	tcgetattr(STDIN_FILENO, &old);
110
111	new = old;
112
113	new.c_lflag &= ~(ECHO \| ICANON);
114	new.c_cc[VMIN] = 0;
115	new.c_cc[VTIME] = 0;
116
117	tcsetattr(STDIN_FILENO, TCSANOW, &new);
118
119	srand(time(NULL));
120
121	printf("\033[?25l");
122
123	struct winsize init_size, current_size;
124	ioctl(STDOUT_FILENO, TIOCGWINSZ, &init_size);
125	current_size = init_size;
126	bool too_small = false;
127
128
129	struct timespec mili100 = {0, 1000000 * 100};
130
131
132	/* Animation at the start */
133	if (!start_animation())
134	goto end_of_program;
135
136
137	/* Menu */
138
139	bool menu = true;
140	bool setting = false;
141	bool change_menu = true;
142
143	main_menu selected_menu = NEW_GAME;
144	settings selected_setting = HEIGHT_S;
145
146	while (menu) {
147
148	direction pressed_key = DIRECTIONS;
149
150	char string[STRING_LEN] = {};
151	ssize_t length_string = read(STDIN_FILENO, string, sizeof(string) - 1);
152
153
154	ioctl(STDOUT_FILENO, TIOCGWINSZ, &current_size);
155
156	if (current_size.ws_col != init_size.ws_col \|\|
157	current_size.ws_row != init_size.ws_row) {
158	init_size = current_size;
159	change_menu = true;
160	}
161
162
163	if (length_string > 0) {
164	string[length_string] = '\0';
165
166	pressed_key = read_direction(string, false);
167	}
168
169	if (pressed_key == Q_KEY)
170	goto end_of_program;
171
172
173	if (!setting) {
174
175	if (!too_small) {
176	switch (pressed_key) {
177	case UP:
178	selected_menu = (selected_menu + (MAIN_MENU - 1)) % MAIN_MENU;
179	change_menu = true;
180	break;
181	case DOWN:
182	selected_menu = (selected_menu + 1) % MAIN_MENU;
183	change_menu = true;
184	break;
185	default:
186	break;
187	}
188	}
189
190	if (change_menu) {
191	too_small = draw_menu(selected_menu, init_size);
192	change_menu = false;
193	}
194
195	if (pressed_key == ENTER && !too_small) {
196	switch (selected_menu) {
197	case NEW_GAME:
198	menu = false;
199	break;
200	case SETTINGS:
201	setting = true;
202	change_menu = true;
203	break;
204	default:
205	goto end_of_program;
206	break;
207	}
208	}
209
210	} else {
211
212	/* Settings Menu */
213
214	if (change_menu) {
215
216	draw_settings(selected_setting, game_speed, game_size);
217
218	change_menu = false;
219	}
220
221
222	if (pressed_key < DIRECTIONS) {
223
224	int8_t setting_change = 0;
225
226	switch (pressed_key) {
227	case UP:
228	selected_setting = (selected_setting + (SETTINGS_MENU - 1)) % SETTINGS_MENU;
229	break;
230	case DOWN:
231	selected_setting = (selected_setting + 1) % SETTINGS_MENU;
232	break;
233	case LEFT:
234	setting_change = 1;
235	break;
236	case RIGHT:
237	setting_change = -1;
238	break;
239	default:
240	break;
241	}
242
243	if (setting_change) {
244	switch (selected_setting) {
245	case SPEED_S:
246	if (
247	game_speed + setting_change <= SPEED_L - 1 &&
248	((int8_t) game_speed) + setting_change >= 0
249	) {
250	game_speed += setting_change;
251	}
252	break;
253	case WIDTH_S:
254	if (
255	game_size.x - setting_change >= MIN_SIZE &&
256	game_size.x - setting_change <= MAX_SIZE
257	) {
258	game_size.x -= setting_change;
259	}
260	break;
261	case HEIGHT_S:
262	if (
263	game_size.y - setting_change >= MIN_SIZE &&
264	game_size.y - setting_change <= MAX_SIZE
265	) {
266	game_size.y -= setting_change;
267	}
268	break;
269	default:
270	break;
271	}
272	}
273
274	change_menu = true;
275
276	}
277
278	if (pressed_key == ENTER) {
279	switch (selected_setting) {
280	case BACK_S:
281	setting = false;
282	break;
283	default:
284	break;
285	}
286	change_menu = true;
287	}
288	}
289
290	nanosleep(&mili100, NULL);
291	}
292
293	/* initialisation of the game */
294
295	snake my_snake;
296	my_snake.length = STARTING_LENGTH;
297
298	my_snake.position = malloc((my_snake.length + 1) * sizeof(snake_part));
299
300	direction shift = RIGHT;
301	direction tmp_direction = shift;
302
303	{
304	uint16_t i;
305
306	my_snake.position[0].coords.y = game_size.y >> 1;
307	my_snake.position[0].coords.x = game_size.x >> 1;
308	my_snake.position[0].directions[0] = shift;
309	my_snake.position[0].directions[1] = shift;
310	for (i = 1; i <= my_snake.length; i++) {
311	my_snake.position[i].coords.y = -1;
312	my_snake.position[i].coords.x = -1;
313	}
314	}
315
316	board_state *board = malloc(game_size.y sizeof(board_state*));
317	board_state values = calloc(game_size.y game_size.x, sizeof(board_state));
318
319	if(board == NULL \|\| values == NULL)
320	goto end_of_program;
321
322	{
323	uint8_t i;
324
325	for (i = 0; i < game_size.y; i++)
326	board[i] = values + i * game_size.x;
327	}
328
329	update_field(my_snake, game_size, board, true);
330
331	bool paused = false;
332
333	uint16_t score = 0;
334
335	if ((too_small = draw_board(game_size, board, current_size, true, false, score)))
336	paused = true;
337
338
339	struct timespec milispeed = {0, 1000000 * (SPEED + game_speed * 25)};
340
341	bool run = true;
342
343	/* start of the actual game loop */
344
345	while (run) {
346
347	/* input handling */
348
349
350	char string[STRING_LEN] = {};
351	ssize_t length_string = read(STDIN_FILENO, string, sizeof(string) - 1);
352
353	if (length_string > 0) {
354	string[length_string] = '\0';
355
356	if (!too_small) {
357	if (toupper(string[0]) == 'P' \|\| string[0] == '\n') {
358	paused = !paused;
359	if (paused)
360	draw_board(game_size, board, current_size, true, paused, score);
361	}
362
363	if (!paused)
364	tmp_direction = read_direction(string, true);
365	}
366
367	if (toupper(string[0]) == 'Q')
368	run = false;
369	}
370
371
372	/* game logic */
373
374	/*
375	struct timeval current;
376	gettimeofday(&current, NULL);*/
377
378	if (/time_diff >= SPEED 1000*/ true) {
379
380	ioctl(STDOUT_FILENO, TIOCGWINSZ, &current_size);
381
382	if (current_size.ws_col != init_size.ws_col \|\|
383	current_size.ws_row != init_size.ws_row) {
384	init_size = current_size;
385
386	paused = true;
387	too_small = draw_board(game_size, board, current_size, true, paused, score);
388	}
389
390	if (!paused) {
391
392	if (tmp_direction < DIRECTIONS &&
393	((shift + (DIRECTIONS >> 1)) % DIRECTIONS) != tmp_direction) {
394	shift = tmp_direction;
395	}
396
397	uint8_t update = update_snake(game_size ,&my_snake, shift);
398
399	uint8_t head_y = my_snake.position[0].coords.y;
400	uint8_t head_x = my_snake.position[0].coords.x;
401
402	if (board[head_y][head_x] == FRUIT) {
403	my_snake.length++;
404	score += 1 +
405	(((MAX_SIZE >> 1) / (game_size.y) +
406	(MAX_SIZE >> 1) / (game_size.x) +
407	(my_snake.length - STARTING_LENGTH)) / (game_speed + 1));
408	snake_part tmp = realloc(my_snake.position, (my_snake.length + 1) sizeof(snake_part));
409	if (tmp == NULL)
410	goto end_free;
411	my_snake.position = tmp;
412
413	my_snake.position[my_snake.length].coords.y = -1;
414	my_snake.position[my_snake.length].coords.x = -1;
415	}
416
417	update_field(my_snake, game_size, board, false);
418
419	draw_board(game_size, board, current_size, false, false, score);
420
421	switch (update) {
422	case 0:
423	printf("\nERROR\n");
424	goto end_free;
425	break;
426	case 2:
427	printf("\nHAHA LOST, LOSER");
428	goto end_free;
429	break;
430	default:
431	break;
432	}
433
434	}
435	}
436	nanosleep(&milispeed, NULL);
437	}
438
439	end_free:
440
441	free(my_snake.position);
442	free(board);
443	free(values);
444
445	end_of_program:
446
447	tcsetattr(STDIN_FILENO, TCSANOW, &old);
448	printf("\033[?25h\n\n");
449
450	printf("\033[32m");
451	printf("\033[2J\033[H");
452
453
454	{
455	FILE* setting_file = fopen(file_path, "w");
456
457	fprintf(setting_file, "%d\n%d\n%d", game_speed, game_size.x, game_size.y);
458	}
459
460	return 0;
461	}