276 lines
6.7 KiB
C++
276 lines
6.7 KiB
C++
|
|
/* wrapper for STL maps */
|
|
|
|
template<class M, class K, class V> class map_wrapper_iter;
|
|
template<class M, class K, class V> class map_wrapper_const_iter;
|
|
|
|
template<class M, class K, class V>
|
|
class map_wrapper
|
|
{
|
|
friend class map_wrapper_iter<M, K, V>;
|
|
friend class map_wrapper_const_iter<M, K, V>;
|
|
|
|
protected:
|
|
class map_impl : public refcounted
|
|
{
|
|
public:
|
|
M t;
|
|
|
|
public:
|
|
map_impl () = default;
|
|
map_impl (const map_impl &) = delete;
|
|
map_impl (const M &t_) : t(t_) { }
|
|
map_impl (initializer_list<std::pair<const K, V> > il) : t(il) { }
|
|
~map_impl () = default;
|
|
|
|
map_impl &operator = (const map_impl &) = delete;
|
|
};
|
|
|
|
ptr<map_impl> impl;
|
|
|
|
public:
|
|
typedef map_wrapper_iter<M, K, V> iter;
|
|
typedef map_wrapper_const_iter<M, K, V> const_iter;
|
|
|
|
public:
|
|
map_wrapper () : impl(new map_impl) { }
|
|
map_wrapper (const map_wrapper &m) : impl(m.impl) { }
|
|
map_wrapper (copy, const map_wrapper &m) : impl(new map_impl (m.impl->t)) { }
|
|
map_wrapper (initializer_list<std::pair<const K, V> > il)
|
|
: impl(new map_impl (il))
|
|
{ }
|
|
map_wrapper (reader &r);
|
|
~map_wrapper () { }
|
|
|
|
map_wrapper &operator = (const map_wrapper &m) { impl = m.impl; return *this; }
|
|
map_wrapper &operator = (initializer_list<std::pair<const K, V> > il)
|
|
{
|
|
impl->t = il;
|
|
return *this;
|
|
}
|
|
|
|
// range-based for
|
|
typename M::const_iterator begin () const { return impl->t.begin (); }
|
|
typename M::const_iterator end () const { return impl->t.end (); }
|
|
|
|
/* returns the pair associated to the smallest key */
|
|
pair<K, V> head () const
|
|
{
|
|
typename M::const_iterator i = impl->t.begin ();
|
|
assert (i != impl->t.end ());
|
|
return pair<K, V> (i->first, i->second);
|
|
}
|
|
|
|
/* returns the pair associated to the largest key */
|
|
pair<K, V> tail () const
|
|
{
|
|
typename M::const_reverse_iterator i = impl->t.rbegin();
|
|
assert (i != impl->t.rend ());
|
|
return pair<K, V> (i->first, i->second);
|
|
}
|
|
|
|
maybe<V> remove_with_value (const K &k)
|
|
{
|
|
typename M::iterator i = impl->t.find (k);
|
|
if (i == impl->t.end ())
|
|
return maybe<V> ();
|
|
else
|
|
{
|
|
V v = i->second;
|
|
impl->t.erase (i);
|
|
return maybe<V> (v);
|
|
}
|
|
}
|
|
|
|
void clear () { impl->t.clear (); }
|
|
bool is_empty () const { return impl->t.empty (); }
|
|
unsigned card () const { return impl->t.size (); }
|
|
void yank (const K &k) { assert (operator % (k)); impl->t.erase (k); }
|
|
V yank_with_value (const K &k)
|
|
{
|
|
typename M::iterator i = impl->t.find (k);
|
|
assert (i != impl->t.end ());
|
|
V v = i->second;
|
|
impl->t.erase (i);
|
|
return v;
|
|
}
|
|
|
|
void operator -= (const K &k) { impl->t.erase (k); }
|
|
|
|
void push (const K &k, const V &v) { assert (!operator % (k)); impl->t.insert (std::pair<K, V> (k, v)); }
|
|
void set (const K &k, const V &v) { operator [] (k) = v; }
|
|
|
|
pair<V &, bool> find (const K &k)
|
|
{
|
|
typename M::iterator i = impl->t.find (k);
|
|
bool present;
|
|
if (i == impl->t.end ())
|
|
{
|
|
i = impl->t.insert (std::pair<K, V> (k, V ())).first;
|
|
present = 0;
|
|
}
|
|
else
|
|
present = 1;
|
|
return pair<V &, bool> (i->second, present);
|
|
}
|
|
|
|
V *operator ^ (const K &k)
|
|
{
|
|
typename M::iterator i = impl->t.find (k);
|
|
return i == impl->t.end () ? 0 : &i->second;
|
|
}
|
|
const V *operator ^ (const K &k) const
|
|
{
|
|
typename M::const_iterator i = impl->t.find (k);
|
|
return i == impl->t.end () ? 0 : &i->second;
|
|
}
|
|
|
|
V &operator [] (const K &k) { return impl->t[k]; }
|
|
const V &operator [] (const K &k) const
|
|
{
|
|
typename M::const_iterator i = impl->t.find (k);
|
|
assert (i != impl->t.end ());
|
|
return i->second;
|
|
}
|
|
const V &operator () (const K &k) const { return operator [] (k); }
|
|
const V &operator () (const K &k, const V &d) const
|
|
{
|
|
typename M::const_iterator i = impl->t.find (k);
|
|
if (i == impl->t.end ())
|
|
return d;
|
|
else
|
|
return i->second;
|
|
}
|
|
|
|
bool operator % (const K &k) const
|
|
{
|
|
typename M::const_iterator i = impl->t.find (k);
|
|
return i != impl->t.end ();
|
|
}
|
|
|
|
bool operator == (const map_wrapper &m) const;
|
|
bool operator != (const map_wrapper &m) const { return !operator == (m); }
|
|
bool operator < (const map_wrapper &m) const;
|
|
|
|
void write_self (writer &w) const;
|
|
};
|
|
|
|
template<class M, class K, class V>
|
|
map_wrapper<M, K, V>::map_wrapper (reader &r)
|
|
: impl(new map_impl)
|
|
{
|
|
unsigned card_ = r.read_unsigned ();
|
|
K k;
|
|
V v;
|
|
for (unsigned i = 0; i < card_; i ++)
|
|
{
|
|
read (r, k);
|
|
read (r, v);
|
|
push (k, v);
|
|
}
|
|
}
|
|
|
|
template<class M, class K, class V> bool
|
|
map_wrapper<M, K, V>::operator == (const map_wrapper &m) const
|
|
{
|
|
if (card () != m.card ())
|
|
return 0;
|
|
|
|
const_iter i = *this,
|
|
j = m;
|
|
while (i && j)
|
|
{
|
|
if (i.key () != j.key ()
|
|
|| i.val () != j.val ())
|
|
return 0;
|
|
i ++;
|
|
j ++;
|
|
}
|
|
if (i || j)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
template<class M, class K, class V> bool
|
|
map_wrapper<M, K, V>::operator < (const map_wrapper &m) const
|
|
{
|
|
const_iter i = *this,
|
|
j = m;
|
|
while (i && j)
|
|
{
|
|
if (i.key () < j.key ())
|
|
return 1;
|
|
else if (i.key () > j.key ())
|
|
return 0;
|
|
else
|
|
{
|
|
assert (i.key () == j.key ());
|
|
if (i.val () < j.val ())
|
|
return 1;
|
|
else if (i.val () > j.val ())
|
|
return 0;
|
|
else
|
|
assert (i.val () == j.val ());
|
|
}
|
|
i ++;
|
|
j ++;
|
|
}
|
|
return !i && j;
|
|
}
|
|
|
|
template<class M, class K, class V> void
|
|
map_wrapper<M, K, V>::write_self (writer &w) const
|
|
{
|
|
write (w, card ());
|
|
for (const_iter i = *this; i; i ++)
|
|
{
|
|
write (w, i.key ());
|
|
write (w, i.val ());
|
|
}
|
|
}
|
|
|
|
template<class M, class K, class V>
|
|
class map_wrapper_iter
|
|
{
|
|
private:
|
|
ptr<typename map_wrapper<M, K, V>::map_impl> impl;
|
|
typename M::iterator i, end;
|
|
bool deleted;
|
|
|
|
public:
|
|
map_wrapper_iter (map_wrapper<M, K, V> &m) : impl(m.impl), i(m.impl->t.begin ()), end(m.impl->t.end ()), deleted(0) { }
|
|
~map_wrapper_iter () { }
|
|
|
|
void del ()
|
|
{
|
|
assert (!deleted);
|
|
typename M::iterator iprev = i ++;
|
|
impl->t.erase (iprev);
|
|
deleted = 1;
|
|
}
|
|
|
|
const K &key () const { assert (!deleted); return i->first; }
|
|
V &val () { assert (!deleted); return i->second; }
|
|
operator bool () const { assert (!deleted); return i != end; }
|
|
void operator ++ () { if (deleted) deleted = 0; else i ++; }
|
|
void operator ++ (int) { operator ++ (); }
|
|
};
|
|
|
|
template<class M, class K, class V>
|
|
class map_wrapper_const_iter
|
|
{
|
|
private:
|
|
ptr<const typename map_wrapper<M, K, V>::map_impl> impl;
|
|
typename M::const_iterator i, end;
|
|
|
|
public:
|
|
map_wrapper_const_iter (const map_wrapper<M, K, V> &m) : impl(m.impl), i(m.impl->t.begin ()), end(m.impl->t.end ()) { }
|
|
~map_wrapper_const_iter () { }
|
|
|
|
const K &key () const { return i->first; }
|
|
const V &val () { return i->second; }
|
|
operator bool () const { return i != end; }
|
|
void operator ++ () { i ++; }
|
|
void operator ++ (int) { i ++; }
|
|
};
|