snake_c

public

Small snake game in C

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32 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;

  if ((env = getenv("XDG_DATA_HOME")) == NULL) {
    printf("No env var XDG_DATA_HOME\n");
    return 1;
  }

  char file_path[PATH_LEN];
  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");
 
  {
    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
40	if ((env = getenv("XDG_DATA_HOME")) == NULL) {
41	printf("No env var XDG_DATA_HOME\n");
42	return 1;
43	}
44
45	char file_path[PATH_LEN];
46	snprintf(file_path, sizeof(file_path), "%s/%s", env, SETTING_FILE);
47
48	{
49	FILE* setting_file = fopen(file_path, "r");
50
51	if (setting_file != NULL) {
52
53	char setting_input[STRING_LEN];
54	char *endptr;
55
56	fgets(setting_input, sizeof(setting_input), setting_file);
57
58	int32_t number = strtol(setting_input, &endptr, 10);
59
60	if (setting_input != endptr) {
61	if (number >= 0 && number < SPEED_L)
62	game_speed = number;
63	}
64
65
66	fgets(setting_input, sizeof(setting_input), setting_file);
67
68	number = strtol(setting_input, &endptr, 10);
69
70	if (setting_input != endptr) {
71	if (number >= MIN_SIZE && number <= MAX_SIZE)
72	game_size.x = number;
73	}
74
75
76	fgets(setting_input, sizeof(setting_input), setting_file);
77
78	number = strtol(setting_input, &endptr, 10);
79
80	if (setting_input != endptr) {
81	if (number >= MIN_SIZE && number <= MAX_SIZE)
82	game_size.y = number;
83	}
84
85	fclose(setting_file);
86	}
87	}
88
89	/* Setting up terminal with termios */
90
91	struct termios old, new;
92
93	tcgetattr(STDIN_FILENO, &old);
94
95	new = old;
96
97	new.c_lflag &= ~(ECHO \| ICANON);
98	new.c_cc[VMIN] = 0;
99	new.c_cc[VTIME] = 0;
100
101	tcsetattr(STDIN_FILENO, TCSANOW, &new);
102
103	srand(time(NULL));
104
105	printf("\033[?25l");
106
107	struct winsize init_size, current_size;
108	ioctl(STDOUT_FILENO, TIOCGWINSZ, &init_size);
109	current_size = init_size;
110	bool too_small = false;
111
112
113	struct timespec mili100 = {0, 1000000 * 100};
114
115
116	/* Animation at the start */
117	if (!start_animation())
118	goto end_of_program;
119
120
121	/* Menu */
122
123	bool menu = true;
124	bool setting = false;
125	bool change_menu = true;
126
127	main_menu selected_menu = NEW_GAME;
128	settings selected_setting = HEIGHT_S;
129
130	while (menu) {
131
132	direction pressed_key = DIRECTIONS;
133
134	char string[STRING_LEN] = {};
135	ssize_t length_string = read(STDIN_FILENO, string, sizeof(string) - 1);
136
137
138	ioctl(STDOUT_FILENO, TIOCGWINSZ, &current_size);
139
140	if (current_size.ws_col != init_size.ws_col \|\|
141	current_size.ws_row != init_size.ws_row) {
142	init_size = current_size;
143	change_menu = true;
144	}
145
146
147	if (length_string > 0) {
148	string[length_string] = '\0';
149
150	pressed_key = read_direction(string, false);
151	}
152
153	if (pressed_key == Q_KEY)
154	goto end_of_program;
155
156
157	if (!setting) {
158
159	if (!too_small) {
160	switch (pressed_key) {
161	case UP:
162	selected_menu = (selected_menu + (MAIN_MENU - 1)) % MAIN_MENU;
163	change_menu = true;
164	break;
165	case DOWN:
166	selected_menu = (selected_menu + 1) % MAIN_MENU;
167	change_menu = true;
168	break;
169	default:
170	break;
171	}
172	}
173
174	if (change_menu) {
175	too_small = draw_menu(selected_menu, init_size);
176	change_menu = false;
177	}
178
179	if (pressed_key == ENTER && !too_small) {
180	switch (selected_menu) {
181	case NEW_GAME:
182	menu = false;
183	break;
184	case SETTINGS:
185	setting = true;
186	change_menu = true;
187	break;
188	default:
189	goto end_of_program;
190	break;
191	}
192	}
193
194	} else {
195
196	/* Settings Menu */
197
198	if (change_menu) {
199
200	draw_settings(selected_setting, game_speed, game_size);
201
202	change_menu = false;
203	}
204
205
206	if (pressed_key < DIRECTIONS) {
207
208	int8_t setting_change = 0;
209
210	switch (pressed_key) {
211	case UP:
212	selected_setting = (selected_setting + (SETTINGS_MENU - 1)) % SETTINGS_MENU;
213	break;
214	case DOWN:
215	selected_setting = (selected_setting + 1) % SETTINGS_MENU;
216	break;
217	case LEFT:
218	setting_change = 1;
219	break;
220	case RIGHT:
221	setting_change = -1;
222	break;
223	default:
224	break;
225	}
226
227	if (setting_change) {
228	switch (selected_setting) {
229	case SPEED_S:
230	if (
231	game_speed + setting_change <= SPEED_L - 1 &&
232	((int8_t) game_speed) + setting_change >= 0
233	) {
234	game_speed += setting_change;
235	}
236	break;
237	case WIDTH_S:
238	if (
239	game_size.x - setting_change >= MIN_SIZE &&
240	game_size.x - setting_change <= MAX_SIZE
241	) {
242	game_size.x -= setting_change;
243	}
244	break;
245	case HEIGHT_S:
246	if (
247	game_size.y - setting_change >= MIN_SIZE &&
248	game_size.y - setting_change <= MAX_SIZE
249	) {
250	game_size.y -= setting_change;
251	}
252	break;
253	default:
254	break;
255	}
256	}
257
258	change_menu = true;
259
260	}
261
262	if (pressed_key == ENTER) {
263	switch (selected_setting) {
264	case BACK_S:
265	setting = false;
266	break;
267	default:
268	break;
269	}
270	change_menu = true;
271	}
272	}
273
274	nanosleep(&mili100, NULL);
275	}
276
277	/* initialisation of the game */
278
279	snake my_snake;
280	my_snake.length = STARTING_LENGTH;
281
282	my_snake.position = malloc((my_snake.length + 1) * sizeof(snake_part));
283
284	direction shift = RIGHT;
285	direction tmp_direction = shift;
286
287	{
288	uint16_t i;
289
290	my_snake.position[0].coords.y = game_size.y >> 1;
291	my_snake.position[0].coords.x = game_size.x >> 1;
292	my_snake.position[0].directions[0] = shift;
293	my_snake.position[0].directions[1] = shift;
294	for (i = 1; i <= my_snake.length; i++) {
295	my_snake.position[i].coords.y = -1;
296	my_snake.position[i].coords.x = -1;
297	}
298	}
299
300	board_state *board = malloc(game_size.y sizeof(board_state*));
301	board_state values = calloc(game_size.y game_size.x, sizeof(board_state));
302
303	if(board == NULL \|\| values == NULL)
304	goto end_of_program;
305
306	{
307	uint8_t i;
308
309	for (i = 0; i < game_size.y; i++)
310	board[i] = values + i * game_size.x;
311	}
312
313	update_field(my_snake, game_size, board, true);
314
315	bool paused = false;
316
317	uint16_t score = 0;
318
319	if ((too_small = draw_board(game_size, board, current_size, true, false, score)))
320	paused = true;
321
322
323	struct timespec milispeed = {0, 1000000 * (SPEED + game_speed * 25)};
324
325	bool run = true;
326
327	/* start of the actual game loop */
328
329	while (run) {
330
331	/* input handling */
332
333
334	char string[STRING_LEN] = {};
335	ssize_t length_string = read(STDIN_FILENO, string, sizeof(string) - 1);
336
337	if (length_string > 0) {
338	string[length_string] = '\0';
339
340	if (!too_small) {
341	if (toupper(string[0]) == 'P' \|\| string[0] == '\n') {
342	paused = !paused;
343	if (paused)
344	draw_board(game_size, board, current_size, true, paused, score);
345	}
346
347	if (!paused)
348	tmp_direction = read_direction(string, true);
349	}
350
351	if (toupper(string[0]) == 'Q')
352	run = false;
353	}
354
355
356	/* game logic */
357
358	/*
359	struct timeval current;
360	gettimeofday(&current, NULL);*/
361
362	if (/time_diff >= SPEED 1000*/ true) {
363
364	ioctl(STDOUT_FILENO, TIOCGWINSZ, &current_size);
365
366	if (current_size.ws_col != init_size.ws_col \|\|
367	current_size.ws_row != init_size.ws_row) {
368	init_size = current_size;
369
370	paused = true;
371	too_small = draw_board(game_size, board, current_size, true, paused, score);
372	}
373
374	if (!paused) {
375
376	if (tmp_direction < DIRECTIONS &&
377	((shift + (DIRECTIONS >> 1)) % DIRECTIONS) != tmp_direction) {
378	shift = tmp_direction;
379	}
380
381	uint8_t update = update_snake(game_size ,&my_snake, shift);
382
383	uint8_t head_y = my_snake.position[0].coords.y;
384	uint8_t head_x = my_snake.position[0].coords.x;
385
386	if (board[head_y][head_x] == FRUIT) {
387	my_snake.length++;
388	score += 1 +
389	(((MAX_SIZE >> 1) / (game_size.y) +
390	(MAX_SIZE >> 1) / (game_size.x) +
391	(my_snake.length - STARTING_LENGTH)) / (game_speed + 1));
392	snake_part tmp = realloc(my_snake.position, (my_snake.length + 1) sizeof(snake_part));
393	if (tmp == NULL)
394	goto end_free;
395	my_snake.position = tmp;
396
397	my_snake.position[my_snake.length].coords.y = -1;
398	my_snake.position[my_snake.length].coords.x = -1;
399	}
400
401	update_field(my_snake, game_size, board, false);
402
403	draw_board(game_size, board, current_size, false, false, score);
404
405	switch (update) {
406	case 0:
407	printf("\nERROR\n");
408	goto end_free;
409	break;
410	case 2:
411	printf("\nHAHA LOST, LOSER");
412	goto end_free;
413	break;
414	default:
415	break;
416	}
417
418	}
419	}
420	nanosleep(&milispeed, NULL);
421	}
422
423	end_free:
424
425	free(my_snake.position);
426	free(board);
427	free(values);
428
429	end_of_program:
430
431	tcsetattr(STDIN_FILENO, TCSANOW, &old);
432	printf("\033[?25h\n\n");
433
434	printf("\033[32m");
435
436	{
437	FILE* setting_file = fopen(file_path, "w");
438
439	fprintf(setting_file, "%d\n%d\n%d", game_speed, game_size.x, game_size.y);
440	}
441
442	return 0;
443	}