4a

#include "4a.h"
#include <stdio.h> /* NULL */
#include <stdlib.h>

void buddy_free(void *addr)
{
    if(addr == NULL)return;
    node_t node = (node_t)addr;


    bst_dump();
    printf("start: %d\n", (int)node);

    while(*node == NODE_FREE){
        //printf("start: %c\n", (char)*node);
        //printf("start: %c\n", (char)NODE_FREE);
        node_t par = bst_parent(node);
        if(par != NULL){
            node = par;
        }else{
            printf("WRONG ADRESS!\n");
            exit(255);
        }
    }
    *node = NODE_FREE;
    bst_housekeeping(bst_root());

    bst_dump();
    memory_dump();
}