static void dump8(unsigned char* to_dump, unsigned long offset,
        unsigned long size)
{
    const int block_size = 1;
    const int block_per_line = 16;
    int max_line = size / block_size;
    unsigned char mychar;
    int i;
    int j;
    for (i = 0; i < max_line; i++)
    {
        if ((i % block_per_line) == 0)
        {
            if (i > 0)
            {
                printf(" ");
                for (j = i - block_per_line; j < i; j++)
                {
                    mychar = *(to_dump + j);
                    if ((mychar < 32) || (mychar >= 127))
                        mychar = '.';
                    printf("%c", mychar);
                }
            }
            printf("\n%08lX:", offset + i * block_size);
        }
        printf(" %02hhX", *(to_dump + i));
    }
    if (i > 0)
    {
        printf(" ");
        for (j = (i >= block_per_line) ? (i - block_per_line) : 0; j < i; j++)
        {
            mychar = *(to_dump + j);
            if ((mychar < 32) || (mychar >= 127))
                mychar = '.';
            printf("%c", mychar);
        }
    }
    printf("\n");
}

//
#define TRACE(x) cout<<__FUNCTION__<<": "<<(x)<<endl;
#define TRACE2(x, y) cout<<__FUNCTION__<<": "<<(x)<<(y)<<endl;