RhodeCode

/* -*- C++ -*-

 *

 * This file is a part of LEMON, a generic C++ optimization library

 *

 * 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.

 *

 */

///\file

///\brief Some basic non inline function and static global data.

#include<lemon/tolerance.h>

#include<lemon/bits/invalid.h>

namespace lemon {

  float Tolerance<float>::def_epsilon = 1e-4;

  double Tolerance<double>::def_epsilon = 1e-10;

  long double Tolerance<long double>::def_epsilon = 1e-14;

#ifndef LEMON_ONLY_TEMPLATES

  const Invalid INVALID = Invalid();

#endif

} //namespace lemon

/* -*- C++ -*-

 *

 * This file is a part of LEMON, a generic C++ optimization library

 *

 * 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_BITS_INVALID_H

#define LEMON_BITS_INVALID_H

///\file

///\brief Definition of INVALID.

namespace lemon {

  /// \brief Dummy type to make it easier to create invalid iterators.

  ///

  /// See \ref INVALID for the usage.

  struct Invalid {

  public:

    bool operator==(Invalid) { return true;  }

    bool operator!=(Invalid) { return false; }

    bool operator< (Invalid) { return false; }

  };

  /// \brief Invalid iterators.

  ///

  /// \ref Invalid is a global type that converts to each iterator

  /// in such a way that the value of the target iterator will be invalid.

  //Some people didn't like this:

  //const Invalid &INVALID = *(Invalid *)0;

#ifdef LEMON_ONLY_TEMPLATES

  const Invalid INVALID = Invalid();

#else

  extern const Invalid INVALID;

#endif

} //namespace lemon

#endif

/* -*- C++ -*-

 *

 * This file is a part of LEMON, a generic C++ optimization library

 *

 * 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.

 *

 */

// This file contains a modified version of the enable_if library from BOOST.

// See the appropriate copyright notice below.

// Boost enable_if library

// Copyright 2003 � The Trustees of Indiana University.

// Use, modification, and distribution is subject to the Boost Software

// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at

// http://www.boost.org/LICENSE_1_0.txt)

//    Authors: Jaakko J�rvi (jajarvi at osl.iu.edu)

//             Jeremiah Willcock (jewillco at osl.iu.edu)

//             Andrew Lumsdaine (lums at osl.iu.edu)

#ifndef LEMON_BITS_UTILITY_H

#define LEMON_BITS_UTILITY_H

///\file

///\brief Miscellaneous basic utilities

///

///\todo Please rethink the organisation of the basic files like this.

///E.g. this file might be merged with invalid.h.

namespace lemon

{

  /// Basic type for defining "tags". A "YES" condition for \c enable_if.

  /// Basic type for defining "tags". A "YES" condition for \c enable_if.

  ///

  ///\sa False

  ///

  /// \todo This should go to a separate "basic_types.h" (or something)

  /// file.

  struct True {

    ///\e

    static const bool value = true;

  };

  /// Basic type for defining "tags". A "NO" condition for \c enable_if.

  /// Basic type for defining "tags". A "NO" condition for \c enable_if.

  ///

  ///\sa True

  struct False {

    ///\e

    static const bool value = false;

  };

  struct InvalidType {

  };

  template <typename T>

  struct Wrap {

    const T &value;

    Wrap(const T &t) : value(t) {}

  };

  /**************** dummy class to avoid ambiguity ****************/

  template<int T> struct dummy { dummy(int) {} };

  /**************** enable_if from BOOST ****************/

  template <typename Type, typename T = void>

  struct exists {

    typedef T type;

  };

  template <bool B, class T = void>

  struct enable_if_c {

    typedef T type;

  };

  template <class T>

  struct enable_if_c<false, T> {};

  template <class Cond, class T = void> 

  struct enable_if : public enable_if_c<Cond::value, T> {};

  template <bool B, class T>

  struct lazy_enable_if_c {

    typedef typename T::type type;

  };

  template <class T>

  struct lazy_enable_if_c<false, T> {};

  template <class Cond, class T> 

  struct lazy_enable_if : public lazy_enable_if_c<Cond::value, T> {};

  template <bool B, class T = void>

  struct disable_if_c {

    typedef T type;

  };

  template <class T>

  struct disable_if_c<true, T> {};

  template <class Cond, class T = void> 

  struct disable_if : public disable_if_c<Cond::value, T> {};

  template <bool B, class T>

  struct lazy_disable_if_c {

    typedef typename T::type type;

  };

  template <class T>

  struct lazy_disable_if_c<true, T> {};

  template <class Cond, class T> 

  struct lazy_disable_if : public lazy_disable_if_c<Cond::value, T> {};

} // namespace lemon

#endif

/* -*- C++ -*-

 *

 * This file is a part of LEMON, a generic C++ optimization library

 *

 * 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.

 *

 */

// This file contains a modified version of the concept checking

// utility from BOOST.

// See the appropriate copyright notice below.

// (C) Copyright Jeremy Siek 2000.

// Distributed under the Boost Software License, Version 1.0. (See

// accompanying file LICENSE_1_0.txt or copy at

// http://www.boost.org/LICENSE_1_0.txt)

//

// Revision History:

//   05 May   2001: Workarounds for HP aCC from Thomas Matelich. (Jeremy Siek)

//   02 April 2001: Removed limits header altogether. (Jeremy Siek)

//   01 April 2001: Modified to use new <boost/limits.hpp> header. (JMaddock)

//

// See http://www.boost.org/libs/concept_check for documentation.

#ifndef LEMON_CONCEPT_CHECKS_H

#define LEMON_CONCEPT_CHECKS_H

namespace lemon {

  /*

    "inline" is used for ignore_unused_variable_warning()

    and function_requires() to make sure there is no

    overtarget with g++.

  */

  template <class T> inline void ignore_unused_variable_warning(const T&) { }

  template <class Concept>

  inline void function_requires()

  {

#if !defined(NDEBUG)

    void (Concept::*x)() = & Concept::constraints;

    ignore_unused_variable_warning(x);

#endif

  }

  template <typename Concept, typename Type>

  inline void checkConcept() {

#if !defined(NDEBUG)

    typedef typename Concept::template Constraints<Type> ConceptCheck;

    void (ConceptCheck::*x)() = & ConceptCheck::constraints;

    ignore_unused_variable_warning(x);

#endif

  }

#define BOOST_CLASS_REQUIRE(type_var, ns, concept) \

  typedef void (ns::concept <type_var>::* func##type_var##concept)(); \

  template <func##type_var##concept Tp1_> \

  struct concept_checking_##type_var##concept { }; \

  typedef concept_checking_##type_var##concept< \

    BOOST_FPTR ns::concept<type_var>::constraints> \

    concept_checking_typedef_##type_var##concept

#define BOOST_CLASS_REQUIRE2(type_var1, type_var2, ns, concept) \

  typedef void (ns::concept <type_var1,type_var2>::* \

     func##type_var1##type_var2##concept)(); \

  template <func##type_var1##type_var2##concept Tp1_> \

  struct concept_checking_##type_var1##type_var2##concept { }; \

  typedef concept_checking_##type_var1##type_var2##concept< \

    BOOST_FPTR ns::concept<type_var1,type_var2>::constraints> \

    concept_checking_typedef_##type_var1##type_var2##concept

#define BOOST_CLASS_REQUIRE3(tv1, tv2, tv3, ns, concept) \

  typedef void (ns::concept <tv1,tv2,tv3>::* \

     func##tv1##tv2##tv3##concept)(); \

  template <func##tv1##tv2##tv3##concept Tp1_> \

  struct concept_checking_##tv1##tv2##tv3##concept { }; \

  typedef concept_checking_##tv1##tv2##tv3##concept< \

    BOOST_FPTR ns::concept<tv1,tv2,tv3>::constraints> \

    concept_checking_typedef_##tv1##tv2##tv3##concept

#define BOOST_CLASS_REQUIRE4(tv1, tv2, tv3, tv4, ns, concept) \

  typedef void (ns::concept <tv1,tv2,tv3,tv4>::* \

     func##tv1##tv2##tv3##tv4##concept)(); \

  template <func##tv1##tv2##tv3##tv4##concept Tp1_> \

  struct concept_checking_##tv1##tv2##tv3##tv4##concept { }; \

  typedef concept_checking_##tv1##tv2##tv3##tv4##concept< \

    BOOST_FPTR ns::concept<tv1,tv2,tv3,tv4>::constraints> \

    concept_checking_typedef_##tv1##tv2##tv3##tv4##concept

} // namespace lemon

#endif // LEMON_CONCEPT_CHECKS_H

/* -*- C++ -*-

 *

 * This file is a part of LEMON, a generic C++ optimization library

 *

 * 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_CONCEPT_MAPS_H

#define LEMON_CONCEPT_MAPS_H

#include <lemon/bits/utility.h>

#include <lemon/concept_check.h>

///\ingroup concept

///\file

///\brief Map concepts checking classes for testing and documenting.

namespace lemon {

  namespace concepts {

    /// \addtogroup concept

    /// @{

    /// Readable map concept

    /// Readable map concept.

    ///

    template<typename K, typename T>

    class ReadMap

    {

    public:

      /// The key type of the map.

      typedef K Key;    

      /// The value type of the map. (The type of objects associated with the keys).

      typedef T Value;

      /// Returns the value associated with a key.

      /// \bug Value shouldn't need to be default constructible.

      ///

      Value operator[](const Key &) const {return Value();}

      template<typename _ReadMap>

      struct Constraints {

	void constraints() {

	  Value val = m[key];

	  val = m[key];

	  typename _ReadMap::Value own_val = m[own_key]; 

	  own_val = m[own_key]; 

	  ignore_unused_variable_warning(val);

	  ignore_unused_variable_warning(own_val);

	  ignore_unused_variable_warning(key);

	}

	Key& key;

	typename _ReadMap::Key& own_key;

	_ReadMap& m;

      };

    };

    /// Writable map concept

    /// Writable map concept.

    ///

    template<typename K, typename T>

    class WriteMap

    {

    public:

      /// The key type of the map.

      typedef K Key;    

      /// The value type of the map. (The type of objects associated with the keys).

      typedef T Value;

      /// Sets the value associated with a key.

      void set(const Key &,const Value &) {}

      ///Default constructor

      WriteMap() {}

      template <typename _WriteMap>

      struct Constraints {

	void constraints() {

	  // No constraints for constructor.

	  m.set(key, val);

	  m.set(own_key, own_val);

	  ignore_unused_variable_warning(key);

	  ignore_unused_variable_warning(val);

	  ignore_unused_variable_warning(own_key);

	  ignore_unused_variable_warning(own_val);

	}

	Value& val;

	typename _WriteMap::Value own_val;

	Key& key;

	typename _WriteMap::Key& own_key;

	_WriteMap& m;

      };

    };

    /// Read/Writable map concept

    /// Read/writable map concept.

    ///

    template<typename K, typename T>

    class ReadWriteMap : public ReadMap<K,T>,

			 public WriteMap<K,T>

    {

    public:

      /// The key type of the map.

      typedef K Key;    

      /// The value type of the map. (The type of objects associated with the keys).

      typedef T Value;

      /// Returns the value associated with a key.

      Value operator[](const Key &) const {return Value();}

      /// Sets the value associated with a key.

      void set(const Key & ,const Value &) {}

      template<typename _ReadWriteMap>

      struct Constraints {

	void constraints() {

	  checkConcept<ReadMap<K, T>, _ReadWriteMap >();

	  checkConcept<WriteMap<K, T>, _ReadWriteMap >();

	}

      };

    };

    /// Dereferable map concept

    /// Dereferable map concept.

    ///

    template<typename K, typename T, typename R, typename CR>

    class ReferenceMap : public ReadWriteMap<K,T>

    {

    public:

      /// Tag for reference maps.

      typedef True ReferenceMapTag;

      /// The key type of the map.

      typedef K Key;    

      /// The value type of the map. (The type of objects associated with the keys).

      typedef T Value;

      /// The reference type of the map.

      typedef R Reference;

      /// The const reference type of the map.

      typedef CR ConstReference;

    protected:

      Value tmp;

    public:

      ///Returns a reference to the value associated to a key.

      Reference operator[](const Key &) { return tmp; }

      ///Returns a const reference to the value associated to a key.

      ConstReference operator[](const Key &) const { return tmp; }

      /// Sets the value associated with a key.

      void set(const Key &k,const Value &t) { operator[](k)=t; }

      /// \todo Rethink this concept. 

      template<typename _ReferenceMap>

      struct ReferenceMapConcept {

	void constraints() {

	  checkConcept<ReadWriteMap, _ReferenceMap >();

	  m[key] = val;

	  val  = m[key];

	  m[key] = ref;

	  ref = m[key];

	  m[own_key] = own_val;

	  own_val  = m[own_key];

	  m[own_key] = own_ref;

	  own_ref = m[own_key];	  	  

	}

	typename _ReferenceMap::Key& own_key;

	typename _ReferenceMap::Value& own_val;

	typename _ReferenceMap::Reference& own_ref;

	Key& key;

	Value& val;

	Reference& ref;

	_ReferenceMap& m;

/* -*- C++ -*-

 *

 * This file is a part of LEMON, a generic C++ optimization library

 *

 * 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_DIM2_H

#define LEMON_DIM2_H

#include <iostream>

#include <lemon/bits/utility.h>

///\ingroup misc

///\file

///\brief A simple two dimensional vector and a bounding box implementation 

///

/// The class \ref lemon::dim2::Point "dim2::Point" implements

///a two dimensional vector with the usual

/// operations.

///

/// The class \ref lemon::dim2::BoundingBox "dim2::BoundingBox"

/// can be used to determine

/// the rectangular bounding box of a set of

/// \ref lemon::dim2::Point "dim2::Point"'s.

namespace lemon {

  ///Tools for handling two dimensional coordinates

  ///This namespace is a storage of several

  ///tools for handling two dimensional coordinates

  namespace dim2 {

  /// \addtogroup misc

  /// @{

  /// A simple two dimensional vector (plainvector) implementation

  /// A simple two dimensional vector (plainvector) implementation

  ///with the usual vector

  /// operators.

  ///

  template<typename T>

    class Point {

    public:

      typedef T Value;

      ///First coordinate

      T x;

      ///Second coordinate

      T y;     

      ///Default constructor

      Point() {}

      ///Construct an instance from coordinates

      Point(T a, T b) : x(a), y(b) { }

      ///The dimension of the vector.

      ///The dimension of the vector.

      ///This function always returns 2. 

      int size() const { return 2; }

      ///Subscripting operator

      ///\c p[0] is \c p.x and \c p[1] is \c p.y

      ///

      T& operator[](int idx) { return idx == 0 ? x : y; }

      ///Const subscripting operator

      ///\c p[0] is \c p.x and \c p[1] is \c p.y

      ///

      const T& operator[](int idx) const { return idx == 0 ? x : y; }

      ///Conversion constructor

      template<class TT> Point(const Point<TT> &p) : x(p.x), y(p.y) {}

      ///Give back the square of the norm of the vector

      T normSquare() const {

        return x*x+y*y;

      }

      ///Increment the left hand side by u

      Point<T>& operator +=(const Point<T>& u) {

        x += u.x;

        y += u.y;

        return *this;

      }

      ///Decrement the left hand side by u

      Point<T>& operator -=(const Point<T>& u) {

        x -= u.x;

        y -= u.y;

        return *this;

      }

      ///Multiply the left hand side with a scalar

      Point<T>& operator *=(const T &u) {

        x *= u;

        y *= u;

        return *this;

      }

      ///Divide the left hand side by a scalar

      Point<T>& operator /=(const T &u) {

        x /= u;

        y /= u;

        return *this;

      }

      ///Return the scalar product of two vectors

      T operator *(const Point<T>& u) const {

        return x*u.x+y*u.y;

      }

      ///Return the sum of two vectors

      Point<T> operator+(const Point<T> &u) const {

        Point<T> b=*this;

        return b+=u;

      }

      ///Return the negative of the vector

      Point<T> operator-() const {

        Point<T> b=*this;

        b.x=-b.x; b.y=-b.y;

        return b;

      }

      ///Return the difference of two vectors

      Point<T> operator-(const Point<T> &u) const {

        Point<T> b=*this;

        return b-=u;

      }

      ///Return a vector multiplied by a scalar

      Point<T> operator*(const T &u) const {

        Point<T> b=*this;

        return b*=u;

      }

      ///Return a vector divided by a scalar

      Point<T> operator/(const T &u) const {

        Point<T> b=*this;

        return b/=u;

      }

      ///Test equality

      bool operator==(const Point<T> &u) const {

        return (x==u.x) && (y==u.y);

      }

      ///Test inequality

      bool operator!=(Point u) const {

        return  (x!=u.x) || (y!=u.y);

      }

    };

  ///Return a Point 

  ///Return a Point.

  ///\relates Point

  template <typename T>

  inline Point<T> makePoint(const T& x, const T& y) {

    return Point<T>(x, y);

  }

  ///Return a vector multiplied by a scalar

  ///Return a vector multiplied by a scalar.

  ///\relates Point

  template<typename T> Point<T> operator*(const T &u,const Point<T> &x) {

    return x*u;

  }

  ///Read a plainvector from a stream

  ///Read a plainvector from a stream.

  ///\relates Point

  ///

  template<typename T>

/* -*- C++ -*-

 *

 * This file is a part of LEMON, a generic C++ optimization library

 *

 * 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_MAPS_H

#define LEMON_MAPS_H

#include <iterator>

#include <functional>

#include <vector>

#include <lemon/bits/utility.h>

// #include <lemon/bits/traits.h>

///\file

///\ingroup maps

///\brief Miscellaneous property maps

///

#include <map>

namespace lemon {

  /// \addtogroup maps

  /// @{

  /// Base class of maps.

  /// Base class of maps.

  /// It provides the necessary <tt>typedef</tt>s required by the map concept.

  template<typename K, typename T>

  class MapBase {

  public:

    /// The key type of the map.

    typedef K Key;

    /// The value type of the map. (The type of objects associated with the keys).

    typedef T Value;

  };

  /// Null map. (a.k.a. DoNothingMap)

  /// This map can be used if you have to provide a map only for

  /// its type definitions, or if you have to provide a writable map, 

  /// but data written to it is not required (i.e. it will be sent to 

  /// <tt>/dev/null</tt>).

  template<typename K, typename T>

  class NullMap : public MapBase<K, T> {

  public:

    typedef MapBase<K, T> Parent;

    typedef typename Parent::Key Key;

    typedef typename Parent::Value Value;

    /// Gives back a default constructed element.

    T operator[](const K&) const { return T(); }

    /// Absorbs the value.

    void set(const K&, const T&) {}

  };

  ///Returns a \c NullMap class

  ///This function just returns a \c NullMap class.

  ///\relates NullMap

  template <typename K, typename V> 

  NullMap<K, V> nullMap() {

    return NullMap<K, V>();

  }

  /// Constant map.

  /// This is a readable map which assigns a specified value to each key.

  /// In other aspects it is equivalent to the \c NullMap.

  template<typename K, typename T>

  class ConstMap : public MapBase<K, T> {

  private:

    T v;

  public:

    typedef MapBase<K, T> Parent;

    typedef typename Parent::Key Key;

    typedef typename Parent::Value Value;

    /// Default constructor

    /// Default constructor.

    /// The value of the map will be uninitialized. 

    /// (More exactly it will be default constructed.)

    ConstMap() {}

    /// Constructor with specified initial value

    /// Constructor with specified initial value.

    /// \param _v is the initial value of the map.

    ConstMap(const T &_v) : v(_v) {}

    ///\e

    T operator[](const K&) const { return v; }

    ///\e

    void setAll(const T &t) {

      v = t;

    }    

    template<typename T1>

    struct rebind {

      typedef ConstMap<K, T1> other;

    };

    template<typename T1>

    ConstMap(const ConstMap<K, T1> &, const T &_v) : v(_v) {}

  };

  ///Returns a \c ConstMap class

  ///This function just returns a \c ConstMap class.

  ///\relates ConstMap

  template<typename K, typename V> 

  inline ConstMap<K, V> constMap(const V &v) {

    return ConstMap<K, V>(v);

  }

  template<typename T, T v>

  struct Const { };

  /// Constant map with inlined constant value.

  /// This is a readable map which assigns a specified value to each key.

  /// In other aspects it is equivalent to the \c NullMap.

  template<typename K, typename V, V v>

  class ConstMap<K, Const<V, v> > : public MapBase<K, V> {

  public:

    typedef MapBase<K, V> Parent;

    typedef typename Parent::Key Key;

    typedef typename Parent::Value Value;

    ConstMap() { }

    ///\e

    V operator[](const K&) const { return v; }

    ///\e

    void set(const K&, const V&) { }

  };

  ///Returns a \c ConstMap class

  ///This function just returns a \c ConstMap class with inlined value.

  ///\relates ConstMap

  template<typename K, typename V, V v> 

  inline ConstMap<K, Const<V, v> > constMap() {

    return ConstMap<K, Const<V, v> >();

  }

  ///Map based on std::map

  ///This is essentially a wrapper for \c std::map with addition that

  ///you can specify a default value different from \c Value().

  template <typename K, typename T, typename Compare = std::less<K> >

  class StdMap {

    template <typename K1, typename T1, typename C1>

    friend class StdMap;

  public:

    typedef True ReferenceMapTag;

    ///\e

    typedef K Key;

    ///\e

    typedef T Value;

    ///\e

    typedef T& Reference;

    ///\e

    typedef const T& ConstReference;

  private:

    typedef std::map<K, T, Compare> Map;

    Value _value;

    Map _map;

  public:

    /// Constructor with specified default value

    StdMap(const T& value = T()) : _value(value) {}

    /// \brief Constructs the map from an appropriate std::map, and explicitly

    /// specifies a default value.

/* -*- C++ -*-

 *

 * This file is a part of LEMON, a generic C++ optimization library

 *

 * 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.

 *

 */

///\file

///\brief Instantiation of the Random class.

#include <lemon/random.h>

namespace lemon {

  /// \brief Global random number generator instance

  ///

  /// A global Mersenne Twister random number generator instance.

  Random rnd;

}

/* -*- C++ -*-

 *

 * This file is a part of LEMON, a generic C++ optimization library

 *

 * 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.

 *

 */

/*

 * This file contains the reimplemented version of the Mersenne Twister

 * Generator of Matsumoto and Nishimura.

 *

 * See the appropriate copyright notice below.

 * 

 * Copyright (C) 1997 - 2002, Makoto Matsumoto and Takuji Nishimura,

 * All rights reserved.                          

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 *

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * 3. The names of its contributors may not be used to endorse or promote 

 *    products derived from this software without specific prior written 

 *    permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS

 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE

 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,

 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

 * OF THE POSSIBILITY OF SUCH DAMAGE.

 *

 *

 * Any feedback is very welcome.

 * http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html

 * email: m-mat @ math.sci.hiroshima-u.ac.jp (remove space)

 */

#ifndef LEMON_RANDOM_H

#define LEMON_RANDOM_H

#include <algorithm>

#include <iterator>

#include <vector>

#include <ctime>

#include <cmath>

#include <lemon/dim2.h>

///\ingroup misc

///\file

///\brief Mersenne Twister random number generator

namespace lemon {

  namespace _random_bits {

    template <typename _Word, int _bits = std::numeric_limits<_Word>::digits>

    struct RandomTraits {};

    template <typename _Word>

    struct RandomTraits<_Word, 32> {

      typedef _Word Word;

      static const int bits = 32;

      static const int length = 624;