CoinWarmStartBasisDiff Class Reference

A `diff' between two CoinWarmStartBasis objects. More...

#include <CoinWarmStartBasis.hpp>

Inheritance diagram for CoinWarmStartBasisDiff:

List of all members.

Public Member Functions
virtual CoinWarmStartDiff *	clone () const
	`Virtual constructor'
virtual CoinWarmStartBasisDiff &	operator= (const CoinWarmStartBasisDiff &rhs)
	Assignment.
virtual	~CoinWarmStartBasisDiff ()
	Destructor.
Protected Member Functions
	CoinWarmStartBasisDiff ()
	Default constructor.
	CoinWarmStartBasisDiff (const CoinWarmStartBasisDiff &cwsbd)
	Copy constructor.
Private Member Functions
	CoinWarmStartBasisDiff (int sze, const unsigned int *const diffNdxs, const unsigned int *const diffVals)
	Standard constructor.
Private Attributes
int	sze_
	Number of entries (and allocated capacity), in units of int.
unsigned int *	diffNdxs_
	Array of diff indices.
unsigned int *	diffVals_
	Array of diff values.
Friends
CoinWarmStartDiff *	CoinWarmStartBasis::generateDiff (const CoinWarmStart *const oldCWS) const
void	CoinWarmStartBasis::applyDiff (const CoinWarmStartDiff *const diff)

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Detailed Description

A `diff' between two CoinWarmStartBasis objects.

This class exists in order to hide from the world the details of calculating and representing a `diff' between two CoinWarmStartBasis objects. For convenience, assignment, cloning, and deletion are visible to the world, and default and copy constructors are made available to derived classes. Knowledge of the rest of this structure, and of generating and applying diffs, is restricted to the friend functions CoinWarmStartBasis::generateDiff() and CoinWarmStartBasis::applyDiff().

The actual data structure is a pair of unsigned int vectors, diffNdxs_ and diffVals_.

Todo:

This is a pretty generic structure, and vector diff is a pretty generic activity. We should be able to convert this to a template.

Using unsigned int as the data type for the diff vectors might help to contain the damage when this code is inevitably compiled for 64 bit architectures. But the notion of int as 4 bytes is hardwired into CoinWarmStartBasis, so changes are definitely required.

Definition at line 322 of file CoinWarmStartBasis.hpp.

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Constructor & Destructor Documentation

CoinWarmStartBasisDiff::CoinWarmStartBasisDiff (   )  [inline, protected]

Default constructor. This is protected (rather than private) so that derived classes can see it when they make their default constructor protected or private. Definition at line 347 of file CoinWarmStartBasis.hpp. References diffNdxs_, diffVals_, and sze_. Referenced by clone(). : sze_(0), diffNdxs_(0), diffVals_(0) { } ;

CoinWarmStartBasisDiff::CoinWarmStartBasisDiff (  const CoinWarmStartBasisDiff &  cwsbd  )  [protected]

Copy constructor. For convenience when copying objects containing CoinWarmStartBasisDiff objects. But consider whether you should be using clone() to retain polymorphism. This is protected (rather than private) so that derived classes can see it when the make their copy constructor protected or private. Definition at line 425 of file CoinWarmStartBasis.cpp. : sze_(rhs.sze_), diffNdxs_(0), diffVals_(0) { if (sze_ > 0) { diffNdxs_ = new unsigned int[sze_] ; memcpy(diffNdxs_,rhs.diffNdxs_,sze_*sizeof(unsigned int)) ; diffVals_ = new unsigned int[sze_] ; memcpy(diffVals_,rhs.diffVals_,sze_*sizeof(unsigned int)) ; } return ; }

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The documentation for this class was generated from the following files:

• CoinWarmStartBasis.hpp
• CoinWarmStartBasis.cpp

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