64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
#include "snake.h"
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#include <stdlib.h>
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struct snake* add_snake(struct snake* snake, int x, int y) {
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struct snake* nova_cast = calloc(1, sizeof(struct snake));
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nova_cast->x = x;
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nova_cast->y = y;
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nova_cast->next = snake;
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return nova_cast;
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}
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struct snake* remove_snake(struct snake* hlava) {
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if (hlava == NULL) return NULL;
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if (hlava->next == NULL) {
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free(hlava);
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return NULL;
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}
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hlava->next = remove_snake(hlava->next);
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return hlava;
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}
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int is_snake(struct snake* snake, int x, int y) {
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for (struct snake* this = snake; this != NULL; this = this->next) {
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if (this->x == x && this->y == y) return 1;
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}
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return 0;
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}
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void free_snake(struct snake* sn) {
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if (sn == NULL) return;
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free_snake(sn->next);
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free(sn);
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}
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int step_state(struct state* st) {
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int nova_x = st->snake->x + st->sx;
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int nova_y = st->snake->y + st->sy;
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if (nova_x < 0 || nova_x >= st->width || nova_y < 0 || nova_y >= st->height)
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return END_WALL;
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if (is_snake(st->snake, nova_x, nova_y))
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return END_SNAKE;
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for (int i = 0; i < FOOD_COUNT; i++) {
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if (st->foodx[i] == nova_x && st->foody[i] == nova_y) {
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st->foodx[i] = -1;
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st->foody[i] = -1;
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st->snake = add_snake(st->snake, nova_x, nova_y);
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int zostatok = 0;
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for (int j = 0; j < FOOD_COUNT; j++) {
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if (st->foodx[j] >= 0) zostatok = 1;
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}
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if (!zostatok) return END_FOOD;
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return END_CONTINUE;
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}
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}
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st->snake = add_snake(st->snake, nova_x, nova_y);
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st->snake = remove_snake(st->snake);
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return END_CONTINUE;
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}
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