diff -r e47fb28cda5e -r 82a2639a05bb lemon/counter.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lemon/counter.h	Sun Mar 30 22:16:35 2008 +0100
@@ -0,0 +1,181 @@
+/* -*- C++ -*-
+ *
+ * This file is a part of LEMON, a generic C++ optimization library
+ *
+ * Copyright (C) 2003-2008
+ * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
+ * (Egervary Research Group on Combinatorial Optimization, EGRES).
+ *
+ * Permission to use, modify and distribute this software is granted
+ * provided that this copyright notice appears in all copies. For
+ * precise terms see the accompanying LICENSE file.
+ *
+ * This software is provided "AS IS" with no warranty of any kind,
+ * express or implied, and with no claim as to its suitability for any
+ * purpose.
+ *
+ */
+
+#ifndef LEMON_COUNTER_H
+#define LEMON_COUNTER_H
+
+#include <string>
+#include <iostream>
+
+///\ingroup timecount
+///\file
+///\brief Tools for counting steps and events
+
+namespace lemon 
+{
+
+  template<class P> class _SubNoCounter;
+
+  template<class P>
+  class _SubCounter 
+  {
+    P &_parent;
+    std::string _title;
+    std::ostream &_os;
+    int count;
+  public:
+
+    typedef _SubCounter<_SubCounter<P> > SubCounter;
+    typedef _SubNoCounter<_SubCounter<P> > SubNoCounter;
+
+    _SubCounter(P &parent)
+      : _parent(parent), _title(), _os(std::cerr), count(0) {}
+    _SubCounter(P &parent,std::string title,std::ostream &os=std::cerr)
+      : _parent(parent), _title(title), _os(os), count(0) {}
+    _SubCounter(P &parent,const char *title,std::ostream &os=std::cerr)
+      : _parent(parent), _title(title), _os(os), count(0) {}
+    ~_SubCounter() { 
+      _os << _title << count <<std::endl;
+      _parent+=count;
+    }
+    _SubCounter &operator++() { count++; return *this;}
+    int operator++(int) { return count++; }
+    _SubCounter &operator--() { count--; return *this;}
+    int operator--(int) { return count--; }
+    _SubCounter &operator+=(int c) { count+=c; return *this;}
+    _SubCounter &operator-=(int c) { count-=c; return *this;}
+    void reset(int c=0) {count=c;}
+    operator int() {return count;}
+  };
+
+  template<class P>
+  class _SubNoCounter 
+  {
+    P &_parent;
+  public:
+    typedef _SubNoCounter<_SubNoCounter<P> > SubCounter;
+    typedef _SubNoCounter<_SubNoCounter<P> > SubNoCounter;
+  
+    _SubNoCounter(P &parent) :_parent(parent) {}
+    _SubNoCounter(P &parent,std::string,std::ostream &) 
+      :_parent(parent) {}
+    _SubNoCounter(P &parent,std::string) 
+      :_parent(parent) {}
+    _SubNoCounter(P &parent,const char *,std::ostream &)
+      :_parent(parent) {}
+    _SubNoCounter(P &parent,const char *)
+      :_parent(parent) {}
+    ~_SubNoCounter() {}
+    _SubNoCounter &operator++() { ++_parent; return *this;}
+    int operator++(int) { _parent++; return 0;}
+    _SubNoCounter &operator--() { --_parent; return *this;}
+    int operator--(int) { _parent--; return 0;}
+    _SubNoCounter &operator+=(int c) { _parent+=c; return *this;}
+    _SubNoCounter &operator-=(int c) { _parent-=c; return *this;}
+    void reset(int) {}
+    void reset() {}
+    operator int() {return 0;}
+  };
+
+
+  /// \addtogroup timecount
+  /// @{
+
+  ///A counter class
+
+  ///This class makes it easier to count certain events. You can increment
+  ///or decrement the counter using operator++ and operator--.
+  ///A report is automatically printed on destruction.
+  ///\todo More doc
+  class Counter 
+  {
+    std::string _title;
+    std::ostream &_os;
+    int count;
+  public:
+    ///\e
+
+    ///\todo document please.
+    ///
+    typedef _SubCounter<Counter> SubCounter;
+    ///\e
+
+    ///\todo document please.
+    ///
+    typedef _SubNoCounter<Counter> SubNoCounter;
+
+    ///\e
+    Counter() : _title(), _os(std::cerr), count(0) {}
+    ///\e
+    Counter(std::string title,std::ostream &os=std::cerr) 
+      : _title(title), _os(os), count(0) {}
+    ///\e
+    Counter(const char *title,std::ostream &os=std::cerr)
+      : _title(title), _os(os), count(0) {}
+    ///Destructor. Prints the given title and the value of the counter.
+    ~Counter() {
+      _os << _title << count <<std::endl;
+    }
+    ///\e
+    Counter &operator++() { count++; return *this;}
+    ///\e
+    int operator++(int) { return count++;}
+    ///\e
+    Counter &operator--() { count--; return *this;}
+    ///\e
+    int operator--(int) { return count--;}
+    ///\e
+    Counter &operator+=(int c) { count+=c; return *this;}
+    ///\e
+    Counter &operator-=(int c) { count-=c; return *this;}
+    ///\e
+    void reset(int c=0) {count=c;}
+    ///\e
+    operator int() {return count;}
+  };
+
+  ///'Do nothing' version of \ref Counter
+
+  ///'Do nothing' version of \ref Counter.
+  ///\sa Counter
+  class NoCounter
+  {
+  public:
+    typedef _SubNoCounter<NoCounter> SubCounter;
+    typedef _SubNoCounter<NoCounter> SubNoCounter;
+
+    NoCounter() {}
+    NoCounter(std::string,std::ostream &) {}
+    NoCounter(const char *,std::ostream &) {}
+    NoCounter(std::string) {}
+    NoCounter(const char *) {}
+    NoCounter &operator++() { return *this; }
+    int operator++(int) { return 0; }
+    NoCounter &operator--() { return *this; }
+    int operator--(int) { return 0; }
+    NoCounter &operator+=(int) { return *this;}
+    NoCounter &operator-=(int) { return *this;}
+    void reset(int) {}
+    void reset() {}
+    operator int() {return 0;}
+  };
+
+  ///@}
+}
+
+#endif