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

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