Bcp 1.4.4
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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"
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
22private:
25
31
32private:
39public:
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
62
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_storage_t
This enumerative constant describes how to store certain data for a search tree node.
Definition BCP_enum.hpp:84
@ BCP_Storage_NoData
No data is stored.
Definition BCP_enum.hpp:86
@ BCP_Storage_Explicit
The data stored is an explicit listing of values.
Definition BCP_enum.hpp:88
@ 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
This class describes the message buffer used for all processes of BCP.
This class stores a vector explicitly or relatively to another vector.
BCP_storage_t storage() const
Return the storage type of the vector.
void pack(BCP_buffer &buf) const
Pack the data into a buffer.
int storage_size() const
Return how much memory it'll take to pack this info.
The class BCP_vec serves the same purpose as the vector class in the standard template library.
This class describes a warmstart information that consists solely of the dual vector.
BCP_warmstart_primaldual(BCP_buffer &buf)
Create the object by unpacking it from a buffer.
virtual BCP_warmstart * empty_wrt_this() const
Create a warmstart info describing that no change should be done.
virtual BCP_storage_t storage() const
Return how the warmstarting info is stored.
BCP_warmstart_primaldual(const BCP_warmstart_primaldual &ws)
Copy constructor.
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,...
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...
void pack(BCP_buffer &buf) const
Pack the warmstart info into a buffer.
virtual void update(const BCP_warmstart *const change)
Update the current data with the one in the argument.
virtual CoinWarmStart * convert_to_CoinWarmStart() const
Return an CoinWarmStart object that can be fed to the LP engine.
virtual int storage_size() const
Return how much memory it'll take to pack this warmstart info.
virtual BCP_warmstart * clone() const
Make a replica of the current warmstart information.
Warmstarting information for the LP solver.