#include <iostream>
#include "family.h"
using namespace std;

inline void add(const void *& p, ptrdiff_t diff) {
	p = static_cast<const char *>(p) + diff;
}

template <class T>
const T& field(const void *& p, const char *s = "")
{
	const T& t = *reinterpret_cast<const T *>(p);
	cout << p << ": " << t << " (" << s << ")\n";
	add(p, sizeof t);
	return t;
}

void print(const mother *m)
{
	const void *p = m;
	cout << "\nThis mother starts at address " << p << ".\n";

	const void *pd = field<ptrdiff_t *>(p, "pointer to table");
	const ptrdiff_t diff = field<ptrdiff_t>(pd, "offset");
	field<int>(p, "mother::j");

	cout << p << " is the address of the first byte after the mother.\n"
		<< "The mother's grandparent starts at address " << p;

	if (diff < 1000) {
		cout << " + " << diff << " == ";
		add(p, diff);
		cout << p;
	}
	cout << ".\n";

	field<int>(p, "grandparent::i");
}