openflow build environment setup

openflow/include/click/pair.hh

@@ -0,0 +1,89 @@
+// -*- c-basic-offset: 4 -*-
+#ifndef CLICK_PAIR_HH
+#define CLICK_PAIR_HH
+#include <click/hashcode.hh>
+#include <click/type_traits.hh>
+CLICK_DECLS
+
+template <class T, class U>
+struct Pair {
+
+    typedef T first_type;
+    typedef U second_type;
+    typedef T key_type;
+    typedef const T &key_const_reference;
+
+    T first;
+    U second;
+
+    inline Pair()
+	: first(), second() {
+    }
+
+    inline Pair(typename fast_argument<T>::type t,
+		typename fast_argument<U>::type u)
+	: first(t), second(u) {
+    }
+
+    inline Pair(const Pair<T, U> &p)
+	: first(p.first), second(p.second) {
+    }
+
+    template <typename V, typename W>
+    inline Pair(const Pair<V, W> &p)
+	: first(p.first), second(p.second) {
+    }
+
+    typedef hashcode_t (Pair<T, U>::*unspecified_bool_type)() const;
+    inline operator unspecified_bool_type() const {
+	return first || second ? &Pair<T, U>::hashcode : 0;
+    }
+
+    inline const T &hashkey() const {
+	return first;
+    }
+
+    inline hashcode_t hashcode() const;
+
+    template <typename V, typename W>
+    Pair<T, U> &operator=(const Pair<V, W> &p) {
+	first = p.first;
+	second = p.second;
+	return *this;
+    }
+
+};
+
+template <class T, class U>
+inline bool operator==(const Pair<T, U> &a, const Pair<T, U> &b)
+{
+    return a.first == b.first && a.second == b.second;
+}
+
+template <class T, class U>
+inline bool operator!=(const Pair<T, U> &a, const Pair<T, U> &b)
+{
+    return a.first != b.first || a.second != b.second;
+}
+
+template <class T, class U>
+inline bool operator<(const Pair<T, U> &a, const Pair<T, U> &b)
+{
+    return a.first < b.first
+	|| (!(b.first < a.first) && a.second < b.second);
+}
+
+template <class T, class U>
+inline hashcode_t Pair<T, U>::hashcode() const
+{
+    return (CLICK_NAME(hashcode)(first) << 7) ^ CLICK_NAME(hashcode)(second);
+}
+
+template <class T, class U>
+inline Pair<T, U> make_pair(T t, U u)
+{
+    return Pair<T, U>(t, u);
+}
+
+CLICK_ENDDECLS
+#endif