convert_num
convert_num(&buf[len], val, 16, 8);
convert_num(buf, val, 0, 32);
convert_num(buf, val, 0, 16);
convert_num(buf, val, 0, 8);
void convert_num(unsigned char *, char *, int, int);
convert_num((unsigned char *)timep, val, 10, 32);
convert_num(buf, val, base, 8);