snake_c

public

Small snake game in C

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36 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;
    }

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