Bcp  1.4.4
BCP_warmstart_primaldual.hpp
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1 // Copyright (C) 2000, International Business Machines
2 // Corporation and others. All Rights Reserved.
3 #ifndef _BCP_WARMSTART_PRIMALDUAL_H
4 #define _BCP_WARMSTART_PRIMALDUAL_H
5 
6 #include "BCP_enum.hpp"
7 #include "BCP_warmstart.hpp"
8 #include "BCP_vector_change.hpp"
9 
10 /* NOTE:
11  Doxygen gracefully generates description for all inherited methods if they
12  are not documented here. So the virtual methods are documented ONLY if they
13  have something additional to say.
14 */
15 
16 //#############################################################################
17 
22 private:
25 
31 
32 private:
34  BCP_vec_change<double> _primal;
39 public:
43  BCP_warmstart_primaldual(BCP_buffer& buf) : _primal(buf), _dual(buf) {}
47  BCP_warmstart_primaldual(const double* pfirst, const double* plast,
48  const double* dfirst, const double* dlast) :
49  _primal(pfirst, plast), _dual(dfirst, dlast) {}
52  _primal(ws._primal), _dual(ws._dual) {}
53 
57  // Inherited methods --------------------------------------------------------
58 
61  virtual CoinWarmStart* convert_to_CoinWarmStart() const;
62 
63  virtual BCP_storage_t storage() const {
64  BCP_storage_t return_matrix[16] = {
67 
70 
73 
76  };
77  int pst = _primal.storage();
78  int dst = _dual.storage();
79  return return_matrix[4*pst + dst];
80  }
81 
82  virtual BCP_warmstart* clone() const {
83  return new BCP_warmstart_primaldual(*this);
84  }
85 
86  virtual BCP_warmstart* empty_wrt_this() const {
87  // The default constructor creates an empty WrtParent warmstart info
88  // (i.e., no change wrt the parent)
89  return new BCP_warmstart_primaldual();
90  }
91 
92  virtual int storage_size() const {
93  return _primal.storage_size() + _dual.storage_size();
94  }
95 
96  virtual void update(const BCP_warmstart* const change);
97 
98  virtual BCP_warmstart* as_change(const BCP_warmstart* const old_ws,
99  const BCP_vec<int>& del_vars,
100  const BCP_vec<int>& del_cuts,
101  const double petol,
102  const double detol) const;
103 
104  // Not inherited methods ----------------------------------------------------
105 
107  void pack(BCP_buffer& buf) const {
108  _primal.pack(buf);
109  _dual.pack(buf);
110  }
111 };
112 
113 #endif
BCP_warmstart_primaldual::pack
void pack(BCP_buffer &buf) const
Pack the warmstart info into a buffer.
Definition: BCP_warmstart_primaldual.hpp:107
BCP_Storage_WrtParent
@ BCP_Storage_WrtParent
The data stored is with respect to the same kind of data in the parent of the search tree node.
Definition: BCP_enum.hpp:91
BCP_warmstart.hpp
BCP_enum.hpp
BCP_vec< int >
BCP_warmstart_primaldual::update
virtual void update(const BCP_warmstart *const change)
Update the current data with the one in the argument.
BCP_Storage_NoData
@ BCP_Storage_NoData
No data is stored.
Definition: BCP_enum.hpp:86
BCP_warmstart_primaldual::BCP_warmstart_primaldual
BCP_warmstart_primaldual(const double *pfirst, const double *plast, const double *dfirst, const double *dlast)
Create an explicitly stored warmstart info by considering the double arrays [fpirst,...
Definition: BCP_warmstart_primaldual.hpp:47
BCP_vec_change::storage_size
int storage_size() const
Return how much memory it'll take to pack this info.
Definition: BCP_vector_change.hpp:161
BCP_warmstart_primaldual
This class describes a warmstart information that consists solely of the dual vector.
Definition: BCP_warmstart_primaldual.hpp:21
BCP_vec_change< double >
BCP_warmstart_primaldual::BCP_warmstart_primaldual
BCP_warmstart_primaldual(BCP_buffer &buf)
Create the object by unpacking it from a buffer.
Definition: BCP_warmstart_primaldual.hpp:43
BCP_warmstart_primaldual::BCP_warmstart_primaldual
BCP_warmstart_primaldual(const BCP_warmstart_primaldual &ws)
Copy constructor.
Definition: BCP_warmstart_primaldual.hpp:51
BCP_vector_change.hpp
BCP_warmstart_primaldual::convert_to_CoinWarmStart
virtual CoinWarmStart * convert_to_CoinWarmStart() const
Return an CoinWarmStart object that can be fed to the LP engine.
BCP_warmstart_primaldual::storage
virtual BCP_storage_t storage() const
Return how the warmstarting info is stored.
Definition: BCP_warmstart_primaldual.hpp:63
BCP_vec_change::pack
void pack(BCP_buffer &buf) const
Pack the data into a buffer.
Definition: BCP_vector_change.hpp:208
BCP_warmstart_primaldual::as_change
virtual BCP_warmstart * as_change(const BCP_warmstart *const old_ws, const BCP_vec< int > &del_vars, const BCP_vec< int > &del_cuts, const double petol, const double detol) const
Return a pointer to a warmstart info describing the currently stored data as a change with respect to...
BCP_warmstart_primaldual::~BCP_warmstart_primaldual
virtual ~BCP_warmstart_primaldual()
Definition: BCP_warmstart_primaldual.hpp:54
BCP_Storage_Explicit
@ BCP_Storage_Explicit
The data stored is an explicit listing of values.
Definition: BCP_enum.hpp:88
CoinWarmStart
BCP_warmstart_primaldual::clone
virtual BCP_warmstart * clone() const
Make a replica of the current warmstart information.
Definition: BCP_warmstart_primaldual.hpp:82
BCP_storage_t
BCP_storage_t
This enumerative constant describes how to store certain data for a search tree node.
Definition: BCP_enum.hpp:84
BCP_warmstart_primaldual::empty_wrt_this
virtual BCP_warmstart * empty_wrt_this() const
Create a warmstart info describing that no change should be done.
Definition: BCP_warmstart_primaldual.hpp:86
BCP_warmstart
Warmstarting information for the LP solver.
Definition: BCP_warmstart.hpp:24
BCP_buffer
This class describes the message buffer used for all processes of BCP.
Definition: BCP_buffer.hpp:39
BCP_warmstart_primaldual::storage_size
virtual int storage_size() const
Return how much memory it'll take to pack this warmstart info.
Definition: BCP_warmstart_primaldual.hpp:92
BCP_vec_change::storage
BCP_storage_t storage() const
Return the storage type of the vector.
Definition: BCP_vector_change.hpp:148