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authorHarpreet2016-09-03 00:34:27 +0530
committerHarpreet2016-09-03 00:34:27 +0530
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treed9d06639fb7fa61aef59be0363655e4747105ec7 /newstructure/thirdparty/linux/include/coin/OsiCuts.hpp
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+// Copyright (C) 2000, International Business Machines
+// Corporation and others. All Rights Reserved.
+// This code is licensed under the terms of the Eclipse Public License (EPL).
+
+#ifndef OsiCuts_H
+#define OsiCuts_H
+
+#include "CoinPragma.hpp"
+
+#include <cmath>
+#include <cfloat>
+#include "OsiCollections.hpp"
+#include "OsiRowCut.hpp"
+#include "OsiColCut.hpp"
+#include "CoinFloatEqual.hpp"
+
+/** Collections of row cuts and column cuts
+*/
+class OsiCuts {
+ friend void OsiCutsUnitTest();
+
+public:
+ /**@name Iterator classes
+ */
+ //@{
+ /** Iterator
+
+ This is a class for iterating over the collection of cuts.
+ */
+ class iterator {
+ friend class OsiCuts;
+ public:
+ iterator(OsiCuts& cuts);
+ iterator(const iterator & src);
+ iterator & operator=( const iterator& rhs);
+ ~iterator ();
+ OsiCut* operator*() const { return cutP_; }
+ iterator operator++();
+
+ iterator operator++(int)
+ {
+ iterator temp = *this;
+ ++*this;
+ return temp;
+ }
+
+ bool operator==(const iterator& it) const {
+ return (colCutIndex_+rowCutIndex_)==(it.colCutIndex_+it.rowCutIndex_);
+ }
+
+ bool operator!=(const iterator& it) const {
+ return !((*this)==it);
+ }
+
+ bool operator<(const iterator& it) const {
+ return (colCutIndex_+rowCutIndex_)<(it.colCutIndex_+it.rowCutIndex_);
+ }
+
+ private:
+ iterator();
+ // *THINK* : how to inline these without sticking the code here (ugly...)
+ iterator begin();
+ iterator end();
+ OsiCuts& cuts_;
+ int rowCutIndex_;
+ int colCutIndex_;
+ OsiCut * cutP_;
+ };
+
+ /** Const Iterator
+
+ This is a class for iterating over the collection of cuts.
+ */
+ class const_iterator {
+ friend class OsiCuts;
+ public:
+ typedef std::forward_iterator_tag iterator_category;
+ typedef OsiCut* value_type;
+ typedef size_t difference_type;
+ typedef OsiCut ** pointer;
+ typedef OsiCut *& reference;
+
+ public:
+ const_iterator(const OsiCuts& cuts);
+ const_iterator(const const_iterator & src);
+ const_iterator & operator=( const const_iterator& rhs);
+ ~const_iterator ();
+ const OsiCut* operator*() const { return cutP_; }
+
+ const_iterator operator++();
+
+ const_iterator operator++(int)
+ {
+ const_iterator temp = *this;
+ ++*this;
+ return temp;
+ }
+
+ bool operator==(const const_iterator& it) const {
+ return (colCutIndex_+rowCutIndex_)==(it.colCutIndex_+it.rowCutIndex_);
+ }
+
+ bool operator!=(const const_iterator& it) const {
+ return !((*this)==it);
+ }
+
+ bool operator<(const const_iterator& it) const {
+ return (colCutIndex_+rowCutIndex_)<(it.colCutIndex_+it.rowCutIndex_);
+ }
+ private:
+ inline const_iterator();
+ // *THINK* : how to inline these without sticking the code here (ugly...)
+ const_iterator begin();
+ const_iterator end();
+ const OsiCuts * cutsPtr_;
+ int rowCutIndex_;
+ int colCutIndex_;
+ const OsiCut * cutP_;
+ };
+ //@}
+
+ //-------------------------------------------------------------------
+ //
+ // Cuts class definition begins here:
+ //
+ //-------------------------------------------------------------------
+
+ /** \name Inserting a cut into collection */
+ //@{
+ /** \brief Insert a row cut */
+ inline void insert( const OsiRowCut & rc );
+ /** \brief Insert a row cut unless it is a duplicate - cut may get sorted.
+ Duplicate is defined as CoinAbsFltEq says same*/
+ void insertIfNotDuplicate( OsiRowCut & rc , CoinAbsFltEq treatAsSame=CoinAbsFltEq(1.0e-12) );
+ /** \brief Insert a row cut unless it is a duplicate - cut may get sorted.
+ Duplicate is defined as CoinRelFltEq says same*/
+ void insertIfNotDuplicate( OsiRowCut & rc , CoinRelFltEq treatAsSame );
+ /** \brief Insert a column cut */
+ inline void insert( const OsiColCut & cc );
+
+ /** \brief Insert a row cut.
+
+ The OsiCuts object takes control of the cut object.
+ On return, \c rcPtr is NULL.
+ */
+ inline void insert( OsiRowCut * & rcPtr );
+ /** \brief Insert a column cut.
+
+ The OsiCuts object takes control of the cut object.
+ On return \c ccPtr is NULL.
+ */
+ inline void insert( OsiColCut * & ccPtr );
+#if 0
+ inline void insert( OsiCut * & cPtr );
+#endif
+
+ /** \brief Insert a set of cuts */
+ inline void insert(const OsiCuts & cs);
+
+ //@}
+
+ /**@name Number of cuts in collection */
+ //@{
+ /// Number of row cuts in collection
+ inline int sizeRowCuts() const;
+ /// Number of column cuts in collection
+ inline int sizeColCuts() const;
+ /// Number of cuts in collection
+ inline int sizeCuts() const;
+ //@}
+
+ /**@name Debug stuff */
+ //@{
+ /// Print cuts in collection
+ inline void printCuts() const;
+ //@}
+
+ /**@name Get a cut from collection */
+ //@{
+ /// Get pointer to i'th row cut
+ inline OsiRowCut * rowCutPtr(int i);
+ /// Get const pointer to i'th row cut
+ inline const OsiRowCut * rowCutPtr(int i) const;
+ /// Get pointer to i'th column cut
+ inline OsiColCut * colCutPtr(int i);
+ /// Get const pointer to i'th column cut
+ inline const OsiColCut * colCutPtr(int i) const;
+
+ /// Get reference to i'th row cut
+ inline OsiRowCut & rowCut(int i);
+ /// Get const reference to i'th row cut
+ inline const OsiRowCut & rowCut(int i) const;
+ /// Get reference to i'th column cut
+ inline OsiColCut & colCut(int i);
+ /// Get const reference to i'th column cut
+ inline const OsiColCut & colCut(int i) const;
+
+ /// Get const pointer to the most effective cut
+ inline const OsiCut * mostEffectiveCutPtr() const;
+ /// Get pointer to the most effective cut
+ inline OsiCut * mostEffectiveCutPtr();
+ //@}
+
+ /**@name Deleting cut from collection */
+ //@{
+ /// Remove i'th row cut from collection
+ inline void eraseRowCut(int i);
+ /// Remove i'th column cut from collection
+ inline void eraseColCut(int i);
+ /// Get pointer to i'th row cut and remove ptr from collection
+ inline OsiRowCut * rowCutPtrAndZap(int i);
+ /*! \brief Clear all row cuts without deleting them
+
+ Handy in case one wants to use CGL without managing cuts in one of
+ the OSI containers. Client is ultimately responsible for deleting the
+ data structures holding the row cuts.
+ */
+ inline void dumpCuts() ;
+ /*! \brief Selective delete and clear for row cuts.
+
+ Deletes the cuts specified in \p to_erase then clears remaining cuts
+ without deleting them. A hybrid of eraseRowCut(int) and dumpCuts().
+ Client is ultimately responsible for deleting the data structures
+ for row cuts not specified in \p to_erase.
+ */
+ inline void eraseAndDumpCuts(const std::vector<int> to_erase) ;
+ //@}
+
+ /**@name Sorting collection */
+ //@{
+ /// Cuts with greatest effectiveness are first.
+ inline void sort();
+ //@}
+
+
+ /**@name Iterators
+ Example of using an iterator to sum effectiveness
+ of all cuts in the collection.
+ <pre>
+ double sumEff=0.0;
+ for ( OsiCuts::iterator it=cuts.begin(); it!=cuts.end(); ++it )
+ sumEff+= (*it)->effectiveness();
+ </pre>
+ */
+ //@{
+ /// Get iterator to beginning of collection
+ inline iterator begin() { iterator it(*this); it.begin(); return it; }
+ /// Get const iterator to beginning of collection
+ inline const_iterator begin() const { const_iterator it(*this); it.begin(); return it; }
+ /// Get iterator to end of collection
+ inline iterator end() { iterator it(*this); it.end(); return it; }
+ /// Get const iterator to end of collection
+ inline const_iterator end() const { const_iterator it(*this); it.end(); return it; }
+ //@}
+
+
+ /**@name Constructors and destructors */
+ //@{
+ /// Default constructor
+ OsiCuts ();
+
+ /// Copy constructor
+ OsiCuts ( const OsiCuts &);
+
+ /// Assignment operator
+ OsiCuts & operator=( const OsiCuts& rhs);
+
+ /// Destructor
+ virtual ~OsiCuts ();
+ //@}
+
+private:
+ //*@name Function operator for sorting cuts by efectiveness */
+ //@{
+ class OsiCutCompare
+ {
+ public:
+ /// Function for sorting cuts by effectiveness
+ inline bool operator()(const OsiCut * c1P,const OsiCut * c2P)
+ { return c1P->effectiveness() > c2P->effectiveness(); }
+ };
+ //@}
+
+ /**@name Private methods */
+ //@{
+ /// Copy internal data
+ void gutsOfCopy( const OsiCuts & source );
+ /// Delete internal data
+ void gutsOfDestructor();
+ //@}
+
+ /**@name Private member data */
+ //@{
+ /// Vector of row cuts pointers
+ OsiVectorRowCutPtr rowCutPtrs_;
+ /// Vector of column cuts pointers
+ OsiVectorColCutPtr colCutPtrs_;
+ //@}
+
+};
+
+
+//-------------------------------------------------------------------
+// insert cuts into collection
+//-------------------------------------------------------------------
+void OsiCuts::insert( const OsiRowCut & rc )
+{
+ OsiRowCut * newCutPtr = rc.clone();
+ //assert(dynamic_cast<OsiRowCut*>(newCutPtr) != NULL );
+ rowCutPtrs_.push_back(static_cast<OsiRowCut*>(newCutPtr));
+}
+void OsiCuts::insert( const OsiColCut & cc )
+{
+ OsiColCut * newCutPtr = cc.clone();
+ //assert(dynamic_cast<OsiColCut*>(newCutPtr) != NULL );
+ colCutPtrs_.push_back(static_cast<OsiColCut*>(newCutPtr));
+}
+
+void OsiCuts::insert( OsiRowCut* & rcPtr )
+{
+ rowCutPtrs_.push_back(rcPtr);
+ rcPtr = NULL;
+}
+void OsiCuts::insert( OsiColCut* &ccPtr )
+{
+ colCutPtrs_.push_back(ccPtr);
+ ccPtr = NULL;
+}
+#if 0
+void OsiCuts::insert( OsiCut* & cPtr )
+{
+ OsiRowCut * rcPtr = dynamic_cast<OsiRowCut*>(cPtr);
+ if ( rcPtr != NULL ) {
+ insert( rcPtr );
+ cPtr = rcPtr;
+ }
+ else {
+ OsiColCut * ccPtr = dynamic_cast<OsiColCut*>(cPtr);
+ assert( ccPtr != NULL );
+ insert( ccPtr );
+ cPtr = ccPtr;
+ }
+}
+#endif
+
+// LANNEZ SEBASTIEN added Thu May 25 01:22:51 EDT 2006
+void OsiCuts::insert(const OsiCuts & cs)
+{
+ for (OsiCuts::const_iterator it = cs.begin (); it != cs.end (); it++)
+ {
+ const OsiRowCut * rCut = dynamic_cast <const OsiRowCut * >(*it);
+ const OsiColCut * cCut = dynamic_cast <const OsiColCut * >(*it);
+ assert (rCut || cCut);
+ if (rCut)
+ insert (*rCut);
+ else
+ insert (*cCut);
+ }
+}
+
+//-------------------------------------------------------------------
+// sort
+//-------------------------------------------------------------------
+void OsiCuts::sort()
+{
+ std::sort(colCutPtrs_.begin(),colCutPtrs_.end(),OsiCutCompare());
+ std::sort(rowCutPtrs_.begin(),rowCutPtrs_.end(),OsiCutCompare());
+}
+
+
+//-------------------------------------------------------------------
+// Get number of in collections
+//-------------------------------------------------------------------
+int OsiCuts::sizeRowCuts() const {
+ return static_cast<int>(rowCutPtrs_.size()); }
+int OsiCuts::sizeColCuts() const {
+ return static_cast<int>(colCutPtrs_.size()); }
+int OsiCuts::sizeCuts() const {
+ return static_cast<int>(sizeRowCuts()+sizeColCuts()); }
+
+//----------------------------------------------------------------
+// Get i'th cut from the collection
+//----------------------------------------------------------------
+const OsiRowCut * OsiCuts::rowCutPtr(int i) const { return rowCutPtrs_[i]; }
+const OsiColCut * OsiCuts::colCutPtr(int i) const { return colCutPtrs_[i]; }
+OsiRowCut * OsiCuts::rowCutPtr(int i) { return rowCutPtrs_[i]; }
+OsiColCut * OsiCuts::colCutPtr(int i) { return colCutPtrs_[i]; }
+
+const OsiRowCut & OsiCuts::rowCut(int i) const { return *rowCutPtr(i); }
+const OsiColCut & OsiCuts::colCut(int i) const { return *colCutPtr(i); }
+OsiRowCut & OsiCuts::rowCut(int i) { return *rowCutPtr(i); }
+OsiColCut & OsiCuts::colCut(int i) { return *colCutPtr(i); }
+
+//----------------------------------------------------------------
+// Get most effective cut from collection
+//----------------------------------------------------------------
+const OsiCut * OsiCuts::mostEffectiveCutPtr() const
+{
+ const_iterator b=begin();
+ const_iterator e=end();
+ return *(std::min_element(b,e,OsiCutCompare()));
+}
+OsiCut * OsiCuts::mostEffectiveCutPtr()
+{
+ iterator b=begin();
+ iterator e=end();
+ //return *(std::min_element(b,e,OsiCutCompare()));
+ OsiCut * retVal = NULL;
+ double maxEff = COIN_DBL_MIN;
+ for ( OsiCuts::iterator it=b; it!=e; ++it ) {
+ if (maxEff < (*it)->effectiveness() ) {
+ maxEff = (*it)->effectiveness();
+ retVal = *it;
+ }
+ }
+ return retVal;
+}
+
+//----------------------------------------------------------------
+// Print all cuts
+//----------------------------------------------------------------
+void
+OsiCuts::printCuts() const
+{
+ // do all column cuts first
+ int i;
+ int numberColCuts=sizeColCuts();
+ for (i=0;i<numberColCuts;i++) {
+ const OsiColCut * cut = colCutPtr(i);
+ cut->print();
+ }
+ int numberRowCuts=sizeRowCuts();
+ for (i=0;i<numberRowCuts;i++) {
+ const OsiRowCut * cut = rowCutPtr(i);
+ cut->print();
+ }
+}
+
+//----------------------------------------------------------------
+// Erase i'th cut from the collection
+//----------------------------------------------------------------
+void OsiCuts::eraseRowCut(int i)
+{
+ delete rowCutPtrs_[i];
+ rowCutPtrs_.erase( rowCutPtrs_.begin()+i );
+}
+void OsiCuts::eraseColCut(int i)
+{
+ delete colCutPtrs_[i];
+ colCutPtrs_.erase( colCutPtrs_.begin()+i );
+}
+/// Get pointer to i'th row cut and remove ptr from collection
+OsiRowCut *
+OsiCuts::rowCutPtrAndZap(int i)
+{
+ OsiRowCut * cut = rowCutPtrs_[i];
+ rowCutPtrs_[i]=NULL;
+ rowCutPtrs_.erase( rowCutPtrs_.begin()+i );
+ return cut;
+}
+void OsiCuts::dumpCuts()
+{
+ rowCutPtrs_.clear() ;
+}
+void OsiCuts::eraseAndDumpCuts(const std::vector<int> to_erase)
+{
+ for (unsigned i=0; i<to_erase.size(); i++) {
+ delete rowCutPtrs_[to_erase[i]];
+ }
+ rowCutPtrs_.clear();
+}
+
+
+#endif