#include <string.h>
#include <stdlib.h>

unsigned char* to_string(struct block b)
{
    unsigned char *str=malloc(sizeof(unsigned char)*sizeof(b));
    memcpy(str,&b,sizeof(b));
    return str;
}

void print_hash(unsigned char hash[], int length)
{
    for(int i=0; i<length; i++)
        printf("%02x",hash[i]);
}

int compare_hash(unsigned char *hash1, unsigned char *hash2)
{
    for(int i=0; i<SHA256_DIGEST_LENGTH; i++)
        if(hash1[i]!=hash2[i])
            return FALSE;
    return TRUE;
}

void print_block(struct block *b)
{
    printf("%p\t",b);
    print_hash(b->prev_hash,sizeof(b->prev_hash));
    printf("\t[%d]\t",b->block_data);
    printf("\n");
}