105 lines
2.2 KiB
C
105 lines
2.2 KiB
C
#include <stdlib.h>
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#include "snake.h"
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struct snake* add_snake(struct snake* snake, int x, int y){
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struct snake* nova_cast = (struct snake*) calloc(1, sizeof(struct snake));
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if (nova_cast == NULL){
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return snake;
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}
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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* snake){
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if (snake == NULL){
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return NULL;
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}
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if (snake->next == NULL){
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free(snake);
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return NULL;
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}
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struct snake* predposledny = snake;
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struct snake* posledny = snake->next;
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while (posledny->next != NULL){
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predposledny = posledny;
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posledny = posledny->next;
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}
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free(posledny);
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predposledny->next = NULL;
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return snake;
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}
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int is_snake(struct snake* snake, int x, int y){
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struct snake* aktualny = snake;
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while (aktualny != NULL){
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if (aktualny->x == x && aktualny->y == y){
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return 1;
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}
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aktualny = aktualny->next;
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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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struct snake* dalsi;
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while (sn != NULL){
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dalsi = sn->next;
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free(sn);
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sn = dalsi;
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}
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}
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int step_state(struct state* state){
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int nova_x = state->snake->x + state->sx;
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int nova_y = state->snake->y + state->sy;
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if (nova_x < 0 || nova_y < 0 || nova_x >= state->width || nova_y >= state->height){
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return END_WALL;
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}
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if (is_snake(state->snake, nova_x, nova_y)){
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return END_SNAKE;
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}
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for (int i = 0; i < FOOD_COUNT; i++){
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if (state->foodx[i] == nova_x && state->foody[i] == nova_y){
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state->snake = add_snake(state->snake, nova_x, nova_y);
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state->foodx[i] = -1;
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state->foody[i] = -1;
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int jedlo_ostalo = 0;
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for (int j = 0; j < FOOD_COUNT; j++){
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if (state->foodx[j] != -1 && state->foody[j] != -1){
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jedlo_ostalo = 1;
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}
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}
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if (jedlo_ostalo == 0){
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return END_FOOD;
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}
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return END_CONTINUE;
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}
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}
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state->snake = add_snake(state->snake, nova_x, nova_y);
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state->snake = remove_snake(state->snake);
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return END_CONTINUE;
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}
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