2 interval.tcc -- implement Interval_t
4 source file of the Flower Library
6 (c) 1996--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
15 #include "interval.hh"
21 _Interval__compare (const Interval_t<T>&a,Interval_t<T> const&b)
23 if (a.elem (LEFT) == b.elem (LEFT) && a.elem (RIGHT) == b.elem (RIGHT))
26 if (a.elem (LEFT) <= b.elem (LEFT) && a.elem (RIGHT) >= b.elem (RIGHT))
29 if (a.elem (LEFT) >= b.elem (LEFT) && a.elem (RIGHT) <= b.elem (RIGHT))
37 Interval_t<T>::contains_b (Interval_t<T> const& a) const
39 int c_i= _Interval__compare (*this, a);
47 Interval__compare (const Interval_t<T>&a,Interval_t<T> const&b)
49 int i = _Interval__compare (a,b);
57 Interval_t<T>::set_empty ()
59 elem (LEFT) = (T) infinity ();
60 elem (RIGHT) = (T) -infinity ();
65 Interval_t<T>::set_full ()
67 elem (LEFT) = (T) -infinity ();
68 elem (RIGHT) = (T) infinity ();
73 Interval_t<T>::length () const
75 if (elem (RIGHT) <= elem (LEFT))
78 return elem (RIGHT)-elem (LEFT);
83 Interval_t<T>::delta () const
85 return elem (RIGHT) - elem (LEFT);
89 smallest Interval which includes *this and #h#
93 Interval_t<T>::unite (Interval_t<T> h)
95 elem (LEFT) = h.elem (LEFT) <? elem (LEFT);
96 elem (RIGHT) = h.elem (RIGHT) >?elem (RIGHT);
99 if (h.elem (LEFT)<elem (LEFT))
100 elem (LEFT) = h.elem (LEFT);
101 if (h.elem (RIGHT)>elem (RIGHT))
102 elem (RIGHT) = h.elem (RIGHT);
109 Interval_t<T>::intersect (Interval_t<T> h)
111 #if defined (__GNUG__) && ! defined (__STRICT_ANSI__)
112 elem (LEFT) = h.elem (LEFT) >? elem (LEFT);
113 elem (RIGHT) = h.elem (RIGHT) <?elem (RIGHT);
115 elem (LEFT) = max (h.elem (LEFT), elem (LEFT));
116 elem (RIGHT) = min (h.elem (RIGHT), elem (RIGHT));
122 intersect (Interval_t<T> x, Interval_t<T> const &y)
130 Interval_t<T>::to_string () const
136 return s + T_to_string (elem (LEFT)) + String ("," ) + T_to_string (elem (RIGHT) ) + String ("]" );
141 Interval_t<T>::contains (T r)
143 return r >= elem (LEFT) && r <= elem (RIGHT);
147 #define INTERVAL__INSTANTIATE(T) struct Interval_t<T>;\
148 template int Interval__compare (const Interval_t<T>&,Interval_t<T> const&)
150 #endif // INTERVAL_TCC