CoinUtils
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CoinUtils
src
CoinPresolveZeros.hpp
Go to the documentation of this file.
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/* $Id: CoinPresolveZeros.hpp 1498 2011-11-02 15:25:35Z mjs $ */
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// Copyright (C) 2002, International Business Machines
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// Corporation and others. All Rights Reserved.
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// This code is licensed under the terms of the Eclipse Public License (EPL).
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#ifndef CoinPresolveZeros_H
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#define CoinPresolveZeros_H
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#define DROP_ZERO 8
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struct
dropped_zero
{
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int
row
;
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int
col
;
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};
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class
drop_zero_coefficients_action
:
public
CoinPresolveAction
{
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const
int
nzeros_
;
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const
dropped_zero
*
const
zeros_
;
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drop_zero_coefficients_action
(
int
nzeros,
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const
dropped_zero
*zeros,
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const
CoinPresolveAction
*
next
) :
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CoinPresolveAction
(next),
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nzeros_
(nzeros),
zeros_
(zeros)
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{}
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public
:
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const
char
*
name
()
const
{
return
(
"drop_zero_coefficients_action"
); }
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static
const
CoinPresolveAction
*
presolve
(
CoinPresolveMatrix
*prob,
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int
*checkcols,
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int
ncheckcols,
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const
CoinPresolveAction
*
next
);
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void
postsolve
(
CoinPostsolveMatrix
*prob)
const
;
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virtual
~drop_zero_coefficients_action
() {
deleteAction
(
zeros_
,
dropped_zero
*); }
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};
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const
CoinPresolveAction
*
drop_zero_coefficients
(
CoinPresolveMatrix
*prob,
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const
CoinPresolveAction
*next);
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#endif
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