123

cv9/snake.c

@@ -0,0 +1,54 @@
+#include "snake.h"
+#include <stdlib.h>
+
+struct snake* add_snake(struct snake* snake,int x,int y){
+    struct snake* head = calloc(1,sizeof(struct snake));
+    if (head == NULL) {
+    return NULL;
+    }
+    head->x = x;
+    head->y = y;
+    head->next = snake;
+    return snake;
+}
+
+struct snake* remove_snake(struct snake* snake){
+    if(snake == NULL)
+        return NULL;
+    if (snake->next == NULL) {
+        free(snake);
+        return NULL;
+    }
+    struct snake* current = snake;
+    struct snake* previous = NULL;
+    while (current->next != NULL) {
+        previous = current;
+        current = current->next;
+    }
+    free(current);
+    previous->next = NULL;
+    return snake;
+}
+
+void free_snake(struct snake* sn){
+    while(sn != NULL){
+        struct snake* next = sn->next;
+        free(sn);
+        sn = next;
+    }
+    
+}
+
+int is_snake(struct snake* snake,int x,int y){
+    if(snake == NULL)
+        return NULL;
+    if(x == snake->x && y == snake->y)
+        return 1;
+    return 0;
+}
+
+int step_state(struct state* st){
+	int nx = (st->snake->x + st->sx);
+    int ny = (st->snake->y + st->sy);
+    return END_CONTINUE;
+}