source: trunk/Cbc/src/CbcFixVariable.cpp

// $Id: CbcFixVariable.cpp 2465 2019-01-03 19:26:52Z unxusr $
// Copyright (C) 2002, International Business Machines
// Corporation and others.  All Rights Reserved.
// This code is licensed under the terms of the Eclipse Public License (EPL).

// Edwin 11/10/2009-- carved out of CbcBranchActual

#if defined(_MSC_VER)
// Turn off compiler warning about long names
#pragma warning(disable : 4786)
#endif
#include <cassert>
#include <cstdlib>
#include <cmath>
#include <cfloat>
//#define CBC_DEBUG

#include "CoinTypes.hpp"
#include "OsiSolverInterface.hpp"
#include "OsiSolverBranch.hpp"
#include "CbcModel.hpp"
#include "CbcMessage.hpp"
#include "CbcFixVariable.hpp"
#include "CbcBranchActual.hpp"
#include "CoinSort.hpp"
#include "CoinError.hpp"

//##############################################################################

// Default Constructor
CbcFixVariable::CbcFixVariable()
  : CbcConsequence()
  , numberStates_(0)
  , states_(NULL)
  , startLower_(NULL)
  , startUpper_(NULL)
  , newBound_(NULL)
  , variable_(NULL)
{
}

// One useful Constructor
CbcFixVariable::CbcFixVariable(int numberStates, const int *states, const int *numberNewLower,
  const int **newLowerValue,
  const int **lowerColumn,
  const int *numberNewUpper, const int **newUpperValue,
  const int **upperColumn)
  : CbcConsequence()
  , states_(NULL)
  , startLower_(NULL)
  , startUpper_(NULL)
  , newBound_(NULL)
  , variable_(NULL)
{
  // How much space
  numberStates_ = numberStates;
  if (numberStates_) {
    states_ = new int[numberStates_];
    memcpy(states_, states, numberStates_ * sizeof(int));
    int i;
    int n = 0;
    startLower_ = new int[numberStates_ + 1];
    startUpper_ = new int[numberStates_ + 1];
    startLower_[0] = 0;
    //count
    for (i = 0; i < numberStates_; i++) {
      n += numberNewLower[i];
      startUpper_[i] = n;
      n += numberNewUpper[i];
      startLower_[i + 1] = n;
    }
    newBound_ = new double[n];
    variable_ = new int[n];
    n = 0;
    for (i = 0; i < numberStates_; i++) {
      int j;
      int k;
      const int *bound;
      const int *variable;
      k = numberNewLower[i];
      bound = newLowerValue[i];
      variable = lowerColumn[i];
      for (j = 0; j < k; j++) {
        newBound_[n] = bound[j];
        variable_[n++] = variable[j];
      }
      k = numberNewUpper[i];
      bound = newUpperValue[i];
      variable = upperColumn[i];
      for (j = 0; j < k; j++) {
        newBound_[n] = bound[j];
        variable_[n++] = variable[j];
      }
    }
  }
}

// Copy constructor
CbcFixVariable::CbcFixVariable(const CbcFixVariable &rhs)
  : CbcConsequence(rhs)
{
  numberStates_ = rhs.numberStates_;
  states_ = NULL;
  startLower_ = NULL;
  startUpper_ = NULL;
  newBound_ = NULL;
  variable_ = NULL;
  if (numberStates_) {
    states_ = CoinCopyOfArray(rhs.states_, numberStates_);
    startLower_ = CoinCopyOfArray(rhs.startLower_, numberStates_ + 1);
    startUpper_ = CoinCopyOfArray(rhs.startUpper_, numberStates_ + 1);
    int n = startLower_[numberStates_];
    newBound_ = CoinCopyOfArray(rhs.newBound_, n);
    variable_ = CoinCopyOfArray(rhs.variable_, n);
  }
}

// Clone
CbcConsequence *
CbcFixVariable::clone() const
{
  return new CbcFixVariable(*this);
}

// Assignment operator
CbcFixVariable &
CbcFixVariable::operator=(const CbcFixVariable &rhs)
{
  if (this != &rhs) {
    CbcConsequence::operator=(rhs);
    delete[] states_;
    delete[] startLower_;
    delete[] startUpper_;
    delete[] newBound_;
    delete[] variable_;
    states_ = NULL;
    startLower_ = NULL;
    startUpper_ = NULL;
    newBound_ = NULL;
    variable_ = NULL;
    numberStates_ = rhs.numberStates_;
    if (numberStates_) {
      states_ = CoinCopyOfArray(rhs.states_, numberStates_);
      startLower_ = CoinCopyOfArray(rhs.startLower_, numberStates_ + 1);
      startUpper_ = CoinCopyOfArray(rhs.startUpper_, numberStates_ + 1);
      int n = startLower_[numberStates_];
      newBound_ = CoinCopyOfArray(rhs.newBound_, n);
      variable_ = CoinCopyOfArray(rhs.variable_, n);
    }
  }
  return *this;
}

// Destructor
CbcFixVariable::~CbcFixVariable()
{
  delete[] states_;
  delete[] startLower_;
  delete[] startUpper_;
  delete[] newBound_;
  delete[] variable_;
}
// Set up a startLower for a single member
void CbcFixVariable::applyToSolver(OsiSolverInterface *solver, int state) const
{
  assert(state == -9999 || state == 9999);
  // Find state
  int find;
  for (find = 0; find < numberStates_; find++)
    if (states_[find] == state)
      break;
  if (find == numberStates_)
    return;
  int i;
  // Set new lower bounds
  for (i = startLower_[find]; i < startUpper_[find]; i++) {
    int iColumn = variable_[i];
    double value = newBound_[i];
    double oldValue = solver->getColLower()[iColumn];
    //printf("for %d old lower bound %g, new %g",iColumn,oldValue,value);
    solver->setColLower(iColumn, CoinMax(value, oldValue));
    //printf(" => %g\n",solver->getColLower()[iColumn]);
  }
  // Set new upper bounds
  for (i = startUpper_[find]; i < startLower_[find + 1]; i++) {
    int iColumn = variable_[i];
    double value = newBound_[i];
    double oldValue = solver->getColUpper()[iColumn];
    //printf("for %d old upper bound %g, new %g",iColumn,oldValue,value);
    solver->setColUpper(iColumn, CoinMin(value, oldValue));
    //printf(" => %g\n",solver->getColUpper()[iColumn]);
  }
}

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*/