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# /home/coin/SVN-release/Alps-1.2.1/CoinUtils/src/CoinPresolveMatrix.hpp

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    00001 /* $Id: CoinPresolveMatrix.hpp 1362 2010-12-19 16:56:55Z stefan $ */
    00002 // Copyright (C) 2002, International Business Machines
    00003 // Corporation and others.  All Rights Reserved.
    00004 #ifndef CoinPresolveMatrix_H
    00005 #define CoinPresolveMatrix_H
    00006
    00007 #include "CoinPragma.hpp"
    00008 #include "CoinPackedMatrix.hpp"
    00009 #include "CoinMessage.hpp"
    00010 #include "CoinTime.hpp"
    00011
    00012 #include <cmath>
    00013 #include <cassert>
    00014 #include <cfloat>
    00015 #include <cassert>
    00016
    00025 #if defined(_MSC_VER)
    00026 // Avoid MS Compiler problem in recognizing type to delete
    00027 // by casting to type.
    00028 #define deleteAction(array,type) delete [] ((type) array)
    00029 #else
    00030 #define deleteAction(array,type) delete [] array
    00031 #endif
    00032
    00037 const double ZTOLDP      = 1e-12;
    00038 // But use a different one if we are doing doubletons etc
    00039 const double ZTOLDP2      = 1e-10;
    00040 //#define PRESOLVE_DEBUG 1
    00041 // Debugging macros/functions
    00042 #ifndef PRESOLVE_DETAIL
    00043 #define PRESOLVE_DETAIL_PRINT(s) {}
    00044 #else
    00045 #define PRESOLVE_DETAIL_PRINT(s) s
    00046 #endif
    00047 #if PRESOLVE_DEBUG || PRESOLVE_CONSISTENCY
    00048 #define PRESOLVE_STMT(s)        s
    00049 #define PRESOLVEASSERT(x) \
    00050   ((x) ? 1 : \
    00051         ((std::cerr << "FAILED ASSERTION at line " \
    00052                     << __LINE__ << ":  " #x "\n"), abort(), 0))
    00053
    00054 inline void DIE(const char *s)  { std::cout<<s; abort(); }
    00055
    00056 // This code is used in [cr]done for columns and rows that are present in
    00057 // the presolved system.
    00058 #define PRESENT_IN_REDUCED      '\377'
    00059
    00060 #else
    00061
    00062 #define PRESOLVEASSERT(x) {}
    00063 #define PRESOLVE_STMT(s) {}
    00064
    00065 inline void DIE(const char *)   {}
    00066
    00067 #endif
    00068
    00069 inline int ALIGN(int n, int m)  { return (((n + m - 1) / m) * m); }
    00070 inline int ALIGN_DOUBLE(int n)  { return ALIGN(n,sizeof(double)); }
    00071
    00072 // Plus infinity
    00073 #ifndef COIN_DBL_MAX
    00074 #define COIN_DBL_MAX DBL_MAX
    00075 #endif
    00076 #define PRESOLVE_INF COIN_DBL_MAX
    00077
    00078 class CoinPostsolveMatrix;
    00079
    00080 // Note 77
    00081 // "Members and bases are constructed in order of declaration
    00082 //  in the class and destroyed in the reverse order."  C++PL 3d Ed. p. 307
    00083 //
    00084 // That's why I put integer members (such as ncols) before the array members;
    00085 // I like to use those integer values during initialization.
    00086 // NOT ANYMORE
    00087
    00137 class CoinPresolveAction
    00138 {
    00139  public:
    00146   static void throwCoinError(const char *error, const char *ps_routine)
    00147   { throw CoinError(error, ps_routine, "CoinPresolve"); }
    00148
    00149
    00154   const CoinPresolveAction *next;
    00155
    00161   CoinPresolveAction(const CoinPresolveAction *next) : next(next) {}
    00163   inline void setNext(const CoinPresolveAction *nextAction)
    00164   { next = nextAction;}
    00165
    00170   virtual const char *name() const = 0;
    00171
    00175   virtual void postsolve(CoinPostsolveMatrix *prob) const = 0;
    00176
    00178   virtual ~CoinPresolveAction() {}
    00179 };
    00180
    00181 /*
    00182   These are needed for OSI-aware constructors associated with
    00183   CoinPrePostsolveMatrix, CoinPresolveMatrix, and CoinPostsolveMatrix.
    00184 */
    00185   class ClpSimplex;
    00186   class OsiSolverInterface;
    00187
    00188 /*
    00189   CoinWarmStartBasis is required for methods in CoinPrePostsolveMatrix
    00190   that accept/return a CoinWarmStartBasis object.
    00191 */
    00192   class CoinWarmStartBasis ;
    00193
    00244 class CoinPrePostsolveMatrix
    00245 {
    00246  public:
    00247
    00257   CoinPrePostsolveMatrix(int ncols_alloc, int nrows_alloc,
    00258                          CoinBigIndex nelems_alloc) ;
    00259
    00264   CoinPrePostsolveMatrix(const OsiSolverInterface * si,
    00265                         int ncols_,
    00266                         int nrows_,
    00267                         CoinBigIndex nelems_);
    00268
    00273   CoinPrePostsolveMatrix(const ClpSimplex * si,
    00274                         int ncols_,
    00275                         int nrows_,
    00276                         CoinBigIndex nelems_,
    00277                          double bulkRatio);
    00278
    00280   ~CoinPrePostsolveMatrix();
    00282
    00292   enum Status {
    00293     isFree = 0x00,
    00294     basic = 0x01,
    00295     atUpperBound = 0x02,
    00296     atLowerBound = 0x03,
    00297     superBasic = 0x04
    00298   };
    00299
    00306
    00308   inline void setRowStatus(int sequence, Status status)
    00309   {
    00310     unsigned char & st_byte = rowstat_[sequence];
    00311     st_byte = static_cast<unsigned char>(st_byte & (~7)) ;
    00312     st_byte = static_cast<unsigned char>(st_byte | status) ;
    00313   }
    00315   inline Status getRowStatus(int sequence) const
    00316   {return static_cast<Status> (rowstat_[sequence]&7);}
    00318   inline bool rowIsBasic(int sequence) const
    00319   {return (static_cast<Status> (rowstat_[sequence]&7)==basic);}
    00321   inline void setColumnStatus(int sequence, Status status)
    00322   {
    00323     unsigned char & st_byte = colstat_[sequence];
    00324     st_byte = static_cast<unsigned char>(st_byte & (~7)) ;
    00325     st_byte = static_cast<unsigned char>(st_byte | status) ;
    00326
    00327 #   ifdef PRESOLVE_DEBUG
    00328     switch (status)
    00329     { case isFree:
    00330       { if (clo_[sequence] > -PRESOLVE_INF || cup_[sequence] < PRESOLVE_INF)
    00331         { std::cout << "Bad status: Var " << sequence
    00332                     << " isFree, lb = " << clo_[sequence]
    00333                     << ", ub = " << cup_[sequence] << std::endl ; }
    00334         break ; }
    00335       case basic:
    00336       { break ; }
    00337       case atUpperBound:
    00338       { if (cup_[sequence] >= PRESOLVE_INF)
    00339         { std::cout << "Bad status: Var " << sequence
    00340                     << " atUpperBound, lb = " << clo_[sequence]
    00341                     << ", ub = " << cup_[sequence] << std::endl ; }
    00342         break ; }
    00343       case atLowerBound:
    00344       { if (clo_[sequence] <= -PRESOLVE_INF)
    00345         { std::cout << "Bad status: Var " << sequence
    00346                     << " atLowerBound, lb = " << clo_[sequence]
    00347                     << ", ub = " << cup_[sequence] << std::endl ; }
    00348         break ; }
    00349       case superBasic:
    00350       { if (clo_[sequence] <= -PRESOLVE_INF && cup_[sequence] >= PRESOLVE_INF)
    00351         { std::cout << "Bad status: Var " << sequence
    00352                     << " superBasic, lb = " << clo_[sequence]
    00353                     << ", ub = " << cup_[sequence] << std::endl ; }
    00354         break ; }
    00355       default:
    00356       { assert(false) ;
    00357         break ; } }
    00358 #   endif
    00359   }
    00361   inline Status getColumnStatus(int sequence) const
    00362   {return static_cast<Status> (colstat_[sequence]&7);}
    00364   inline bool columnIsBasic(int sequence) const
    00365   {return (static_cast<Status> (colstat_[sequence]&7)==basic);}
    00369   void setRowStatusUsingValue(int iRow);
    00373   void setColumnStatusUsingValue(int iColumn);
    00375   void setStructuralStatus(const char *strucStatus, int lenParam) ;
    00377   void setArtificialStatus(const char *artifStatus, int lenParam) ;
    00379   void setStatus(const CoinWarmStartBasis *basis) ;
    00381   CoinWarmStartBasis *getStatus() ;
    00385   const char *columnStatusString(int j) const ;
    00389   const char *rowStatusString(int i) const ;
    00391
    00399
    00400   void setObjOffset(double offset) ;
    00405   void setObjSense(double objSense) ;
    00407   void setPrimalTolerance(double primTol) ;
    00409   void setDualTolerance(double dualTol) ;
    00411   void setColLower(const double *colLower, int lenParam) ;
    00413   void setColUpper(const double *colUpper, int lenParam) ;
    00415   void setColSolution(const double *colSol, int lenParam) ;
    00417   void setCost(const double *cost, int lenParam) ;
    00419   void setReducedCost(const double *redCost, int lenParam) ;
    00421   void setRowLower(const double *rowLower, int lenParam) ;
    00423   void setRowUpper(const double *rowUpper, int lenParam) ;
    00425   void setRowPrice(const double *rowSol, int lenParam) ;
    00427   void setRowActivity(const double *rowAct, int lenParam) ;
    00429
    00432
    00433   inline int getNumCols()
    00434   { return (ncols_) ; }
    00436   inline int getNumRows()
    00437   { return (nrows_) ; }
    00439   inline int getNumElems()
    00440   { return (nelems_) ; }
    00442   inline const CoinBigIndex *getColStarts() const
    00443   { return (mcstrt_) ; }
    00445   inline const int *getColLengths() const
    00446   { return (hincol_) ; }
    00448   inline const int *getRowIndicesByCol() const
    00449   { return (hrow_) ; }
    00451   inline const double *getElementsByCol() const
    00452   { return (colels_) ; }
    00454   inline const double *getColLower() const
    00455   { return (clo_) ; }
    00457   inline const double *getColUpper() const
    00458   { return (cup_) ; }
    00460   inline const double *getCost() const
    00461   { return (cost_) ; }
    00463   inline const double *getRowLower() const
    00464   { return (rlo_) ; }
    00466   inline const double *getRowUpper() const
    00467   { return (rup_) ; }
    00469   inline const double *getColSolution() const
    00470   { return (sol_) ; }
    00472   inline const double *getRowActivity() const
    00473   { return (acts_) ; }
    00475   inline const double *getRowPrice() const
    00476   { return (rowduals_) ; }
    00478   inline const double *getReducedCost() const
    00479   { return (rcosts_) ; }
    00481   inline int countEmptyCols()
    00482   { int empty = 0 ;
    00483     for (int i = 0 ; i < ncols_ ; i++) if (hincol_[i] == 0) empty++ ;
    00484     return (empty) ; }
    00486
    00487
    00490
    00491   inline CoinMessageHandler *messageHandler() const
    00492   { return handler_; }
    00498   inline void setMessageHandler(CoinMessageHandler *handler)
    00499   { if (defaultHandler_ == true)
    00500     { delete handler_ ;
    00501       defaultHandler_ = false ; }
    00502     handler_ = handler ; }
    00504   inline CoinMessages messages() const
    00505   { return messages_; }
    00507
    00517
    00519   int ncols_;
    00521   int nrows_;
    00523   CoinBigIndex nelems_;
    00524
    00526   int ncols0_;
    00528   int nrows0_ ;
    00530   CoinBigIndex nelems0_ ;
    00539   CoinBigIndex bulk0_ ;
    00541   double bulkRatio_;
    00543
    00552
    00553   CoinBigIndex *mcstrt_;
    00555   int *hincol_;
    00557   int *hrow_;
    00559   double *colels_;
    00560
    00562   double *cost_;
    00564   double originalOffset_;
    00565
    00567   double *clo_;
    00569   double *cup_;
    00570
    00572   double *rlo_;
    00574   double *rup_;
    00575
    00577   int * originalColumn_;
    00579   int * originalRow_;
    00580
    00582   double ztolzb_;
    00584   double ztoldj_;
    00585
    00587   double maxmin_;
    00589
    00610   double *sol_;
    00616   double *rowduals_;
    00622   double *acts_;
    00628   double *rcosts_;
    00629
    00636   unsigned char *colstat_;
    00637
    00644   unsigned char *rowstat_;
    00646
    00655
    00656   CoinMessageHandler *handler_;
    00658   bool defaultHandler_;
    00660   CoinMessage messages_;
    00662
    00663 };
    00664
    00665
    00690 class presolvehlink
    00691 { public:
    00692   int pre, suc;
    00693 } ;
    00694
    00695 #define NO_LINK -66666666
    00696
    00702 inline void PRESOLVE_REMOVE_LINK(presolvehlink *link, int i)
    00703 {
    00704   int ipre = link[i].pre;
    00705   int isuc = link[i].suc;
    00706   if (ipre >= 0) {
    00707     link[ipre].suc = isuc;
    00708   }
    00709   if (isuc >= 0) {
    00710     link[isuc].pre = ipre;
    00711   }
    00712   link[i].pre = NO_LINK, link[i].suc = NO_LINK;
    00713 }
    00714
    00720 inline void PRESOLVE_INSERT_LINK(presolvehlink *link, int i, int j)
    00721 {
    00722   int isuc = link[j].suc;
    00723   link[j].suc = i;
    00724   link[i].pre = j;
    00725   if (isuc >= 0) {
    00726     link[isuc].pre = i;
    00727   }
    00728   link[i].suc = isuc;
    00729 }
    00730
    00742 inline void PRESOLVE_MOVE_LINK(presolvehlink *link, int i, int j)
    00743 {
    00744   int ipre = link[i].pre;
    00745   int isuc = link[i].suc;
    00746   if (ipre >= 0) {
    00747     link[ipre].suc = j;
    00748   }
    00749   if (isuc >= 0) {
    00750     link[isuc].pre = j;
    00751   }
    00752   link[i].pre = NO_LINK, link[i].suc = NO_LINK;
    00753 }
    00754
    00755
    00777 class CoinPresolveMatrix : public CoinPrePostsolveMatrix
    00778 {
    00779  public:
    00780
    00787   CoinPresolveMatrix(int ncols_alloc, int nrows_alloc,
    00788                      CoinBigIndex nelems_alloc) ;
    00789
    00794   CoinPresolveMatrix(int ncols0,
    00795                     double maxmin,
    00796                     // end prepost members
    00797
    00798                     ClpSimplex * si,
    00799
    00800                     // rowrep
    00801                     int nrows,
    00802                     CoinBigIndex nelems,
    00803                  bool doStatus,
    00804                  double nonLinearVariable,
    00805                      double bulkRatio);
    00806
    00808   void update_model(ClpSimplex * si,
    00809                             int nrows0,
    00810                             int ncols0,
    00811                             CoinBigIndex nelems0);
    00816   CoinPresolveMatrix(int ncols0,
    00817                      double maxmin,
    00818                      // end prepost members
    00819                      OsiSolverInterface * si,
    00820                      // rowrep
    00821                      int nrows,
    00822                      CoinBigIndex nelems,
    00823                      bool doStatus,
    00824                      double nonLinearVariable,
    00825                      const char * prohibited,
    00826                      const char * rowProhibited=NULL);
    00827
    00829   void update_model(OsiSolverInterface * si,
    00830                             int nrows0,
    00831                             int ncols0,
    00832                             CoinBigIndex nelems0);
    00833
    00835   ~CoinPresolveMatrix();
    00836
    00842   friend void assignPresolveToPostsolve (CoinPresolveMatrix *&preObj) ;
    00843
    00852   void setMatrix(const CoinPackedMatrix *mtx) ;
    00853
    00855   inline int countEmptyRows()
    00856   { int empty = 0 ;
    00857     for (int i = 0 ; i < nrows_ ; i++) if (hinrow_[i] == 0) empty++ ;
    00858     return (empty) ; }
    00859
    00865   inline void setVariableType(int i, int variableType)
    00866   { if (integerType_ == 0) integerType_ = new unsigned char [ncols0_] ;
    00867     integerType_[i] = static_cast<unsigned char>(variableType) ; }
    00868
    00874   void setVariableType(const unsigned char *variableType, int lenParam) ;
    00875
    00881   void setVariableType (bool allIntegers, int lenParam) ;
    00882
    00884   inline void setAnyInteger (bool anyInteger = true)
    00885   { anyInteger_ = anyInteger ; }
    00887
    00891
    00893   inline const CoinBigIndex *getRowStarts() const
    00894   { return (mrstrt_) ; }
    00896   inline const int *getColIndicesByRow() const
    00897   { return (hcol_) ; }
    00899   inline const double *getElementsByRow() const
    00900   { return (rowels_) ; }
    00901
    00907   inline bool isInteger (int i) const
    00908   { if (integerType_ == 0)
    00909     { return (anyInteger_) ; }
    00910     else
    00911     if (integerType_[i] == 1)
    00912     { return (true) ; }
    00913     else
    00914     { return (false) ; } }
    00915
    00920   inline bool anyInteger () const
    00921   { return (anyInteger_) ; }
    00923   inline int presolveOptions() const
    00924   { return presolveOptions_;}
    00926   inline void setPresolveOptions(int value)
    00927   { presolveOptions_=value;}
    00929
    00937
    00938   presolvehlink *clink_;
    00940   presolvehlink *rlink_;
    00942
    00944   double dobias_;
    00945
    00947   inline void change_bias(double change_amount)
    00948   {
    00949     dobias_ += change_amount;
    00950   #if PRESOLVE_DEBUG
    00951     assert(fabs(change_amount)<1.0e50);
    00952   #endif
    00953     if (change_amount)
    00954       PRESOLVE_STMT(printf("changing bias by %g to %g\n",
    00955                             change_amount, dobias_));
    00956   }
    00957
    00966
    00967   CoinBigIndex *mrstrt_;
    00969   int *hinrow_;
    00971   double *rowels_;
    00973   int *hcol_;
    00975
    00977   unsigned char *integerType_;
    00983   bool anyInteger_ ;
    00985   bool tuning_;
    00987   void statistics();
    00989   double startTime_;
    00990
    00992   double feasibilityTolerance_;
    00994   inline double feasibilityTolerance()
    00995   { return (feasibilityTolerance_) ; }
    00997   inline void setFeasibilityTolerance (double val)
    00998   { feasibilityTolerance_ = val ; }
    00999
    01005   int status_;
    01007   inline int status()
    01008   { return (status_) ; }
    01010   inline void setStatus(int status)
    01011   { status_ = (status&0x3) ; }
    01012
    01018   int pass_;
    01020   inline void setPass (int pass = 0)
    01021   { pass_ = pass ; }
    01022
    01027   int maxSubstLevel_;
    01029   inline void setMaximumSubstitutionLevel (int level)
    01030   { maxSubstLevel_ = level ; }
    01031
    01032
    01055   unsigned char * colChanged_;
    01057   int * colsToDo_;
    01059   int numberColsToDo_;
    01061   int * nextColsToDo_;
    01063   int numberNextColsToDo_;
    01064
    01074   unsigned char * rowChanged_;
    01076   int * rowsToDo_;
    01078   int numberRowsToDo_;
    01080   int * nextRowsToDo_;
    01082   int numberNextRowsToDo_;
    01091   int presolveOptions_;
    01097   bool anyProhibited_;
    01099   int * usefulRowInt_;
    01101   double * usefulRowDouble_;
    01103   int * usefulColumnInt_;
    01105   double * usefulColumnDouble_;
    01107   double * randomNumber_;
    01109   int * infiniteUp_;
    01111   double * sumUp_;
    01113   int * infiniteDown_;
    01115   double * sumDown_;
    01117
    01120
    01126   void initColsToDo () ;
    01127
    01133   int stepColsToDo () ;
    01134
    01136   inline int numberColsToDo()
    01137   { return (numberColsToDo_) ; }
    01138
    01140   inline bool colChanged(int i) const {
    01141     return (colChanged_[i]&1)!=0;
    01142   }
    01144   inline void unsetColChanged(int i) {
    01145     colChanged_[i] = static_cast<unsigned char>(colChanged_[i] & (~1)) ;
    01146   }
    01148   inline void setColChanged(int i) {
    01149     colChanged_[i] = static_cast<unsigned char>(colChanged_[i] | (1)) ;
    01150   }
    01152   inline void addCol(int i) {
    01153     if ((colChanged_[i]&1)==0) {
    01154       colChanged_[i] = static_cast<unsigned char>(colChanged_[i] | (1)) ;
    01155       nextColsToDo_[numberNextColsToDo_++] = i;
    01156     }
    01157   }
    01159   inline bool colProhibited(int i) const {
    01160     return (colChanged_[i]&2)!=0;
    01161   }
    01168   inline bool colProhibited2(int i) const {
    01169     if (!anyProhibited_)
    01170       return false;
    01171     else
    01172       return (colChanged_[i]&2)!=0;
    01173   }
    01175   inline void setColProhibited(int i) {
    01176     colChanged_[i] = static_cast<unsigned char>(colChanged_[i] | (2)) ;
    01177   }
    01183   inline bool colUsed(int i) const {
    01184     return (colChanged_[i]&4)!=0;
    01185   }
    01187   inline void setColUsed(int i) {
    01188     colChanged_[i] = static_cast<unsigned char>(colChanged_[i] | (4)) ;
    01189   }
    01191   inline void unsetColUsed(int i) {
    01192     colChanged_[i] = static_cast<unsigned char>(colChanged_[i] & (~4)) ;
    01193   }
    01194
    01200   void initRowsToDo () ;
    01201
    01207   int stepRowsToDo () ;
    01208
    01210   inline int numberRowsToDo()
    01211   { return (numberRowsToDo_) ; }
    01212
    01214   inline bool rowChanged(int i) const {
    01215     return (rowChanged_[i]&1)!=0;
    01216   }
    01218   inline void unsetRowChanged(int i) {
    01219     rowChanged_[i] = static_cast<unsigned char>(rowChanged_[i] & (~1)) ;
    01220   }
    01222   inline void setRowChanged(int i) {
    01223     rowChanged_[i] = static_cast<unsigned char>(rowChanged_[i] | (1)) ;
    01224   }
    01226   inline void addRow(int i) {
    01227     if ((rowChanged_[i]&1)==0) {
    01228       rowChanged_[i] = static_cast<unsigned char>(rowChanged_[i] | (1)) ;
    01229       nextRowsToDo_[numberNextRowsToDo_++] = i;
    01230     }
    01231   }
    01233   inline bool rowProhibited(int i) const {
    01234     return (rowChanged_[i]&2)!=0;
    01235   }
    01242   inline bool rowProhibited2(int i) const {
    01243     if (!anyProhibited_)
    01244       return false;
    01245     else
    01246       return (rowChanged_[i]&2)!=0;
    01247   }
    01249   inline void setRowProhibited(int i) {
    01250     rowChanged_[i] = static_cast<unsigned char>(rowChanged_[i] | (2)) ;
    01251   }
    01257   inline bool rowUsed(int i) const {
    01258     return (rowChanged_[i]&4)!=0;
    01259   }
    01261   inline void setRowUsed(int i) {
    01262     rowChanged_[i] = static_cast<unsigned char>(rowChanged_[i] | (4)) ;
    01263   }
    01265   inline void unsetRowUsed(int i) {
    01266     rowChanged_[i] = static_cast<unsigned char>(rowChanged_[i] & (~4)) ;
    01267   }
    01268
    01269
    01271   inline bool anyProhibited() const
    01272   { return anyProhibited_;}
    01274   inline void setAnyProhibited(bool val = true)
    01275   { anyProhibited_ = val ; }
    01278   int recomputeSums(int iRow);
    01280   int initializeStuff();
    01282   void deleteStuff();
    01284
    01285 };
    01286
    01311 class CoinPostsolveMatrix : public CoinPrePostsolveMatrix
    01312 {
    01313  public:
    01314
    01321   CoinPostsolveMatrix(int ncols_alloc, int nrows_alloc,
    01322                       CoinBigIndex nelems_alloc) ;
    01323
    01324
    01329   CoinPostsolveMatrix(ClpSimplex * si,
    01330
    01331                    int ncols0,
    01332                    int nrows0,
    01333                    CoinBigIndex nelems0,
    01334
    01335                    double maxmin_,
    01336                    // end prepost members
    01337
    01338                    double *sol,
    01339                    double *acts,
    01340
    01341                    unsigned char *colstat,
    01342                    unsigned char *rowstat);
    01343
    01348   CoinPostsolveMatrix(OsiSolverInterface * si,
    01349
    01350                    int ncols0,
    01351                    int nrows0,
    01352                    CoinBigIndex nelems0,
    01353
    01354                    double maxmin_,
    01355                    // end prepost members
    01356
    01357                    double *sol,
    01358                    double *acts,
    01359
    01360                    unsigned char *colstat,
    01361                    unsigned char *rowstat);
    01362
    01373   void assignPresolveToPostsolve (CoinPresolveMatrix *&preObj) ;
    01374
    01376   ~CoinPostsolveMatrix();
    01377
    01389
    01391   CoinBigIndex free_list_;
    01393   int maxlink_;
    01398   CoinBigIndex *link_;
    01399
    01401
    01409   char *cdone_;
    01410   char *rdone_;
    01412
    01414   void check_nbasic();
    01415
    01416 };
    01417
    01418
    01419 #define PRESOLVEFINITE(n)       (-PRESOLVE_INF < (n) && (n) < PRESOLVE_INF)
    01420
    01427
    01432 void presolve_make_memlists(/*CoinBigIndex *starts,*/ int *lengths,
    01433                             presolvehlink *link, int n);
    01434
    01442 bool presolve_expand_major(CoinBigIndex *majstrts, double *majels,
    01443                            int *minndxs, int *majlens,
    01444                            presolvehlink *majlinks, int nmaj, int k) ;
    01445
    01451 inline bool presolve_expand_col(CoinBigIndex *mcstrt, double *colels,
    01452                                 int *hrow, int *hincol,
    01453                                 presolvehlink *clink, int ncols, int colx)
    01454 { return presolve_expand_major(mcstrt,colels,
    01455                                hrow,hincol,clink,ncols,colx) ; }
    01456
    01462 inline bool presolve_expand_row(CoinBigIndex *mrstrt, double *rowels,
    01463                                 int *hcol, int *hinrow,
    01464                                 presolvehlink *rlink, int nrows, int rowx)
    01465 { return presolve_expand_major(mrstrt,rowels,
    01466                                hcol,hinrow,rlink,nrows,rowx) ; }
    01467
    01468
    01477 inline CoinBigIndex presolve_find_minor(int tgt, CoinBigIndex ks, CoinBigIndex ke,
    01478                                  const int *minndxs)
    01479 { CoinBigIndex k ;
    01480   for (k = ks ; k < ke ; k++)
    01481 #ifndef NDEBUG
    01482   { if (minndxs[k] == tgt)
    01483       return (k) ; }
    01484   DIE("FIND_MINOR") ;
    01485
    01486   abort () ; return -1;
    01487 #else
    01488   { if (minndxs[k] == tgt)
    01489       break ; }
    01490   return (k) ;
    01491 #endif
    01492 }
    01493
    01500 inline CoinBigIndex presolve_find_row(int row, CoinBigIndex kcs,
    01501                                       CoinBigIndex kce, const int *hrow)
    01502 { return presolve_find_minor(row,kcs,kce,hrow) ; }
    01503
    01510 inline CoinBigIndex presolve_find_col(int col, CoinBigIndex krs,
    01511                                       CoinBigIndex kre, const int *hcol)
    01512 { return presolve_find_minor(col,krs,kre,hcol) ; }
    01513
    01514
    01523 CoinBigIndex presolve_find_minor1(int tgt, CoinBigIndex ks, CoinBigIndex ke,
    01524                                   const int *minndxs);
    01525
    01532 inline CoinBigIndex presolve_find_row1(int row, CoinBigIndex kcs,
    01533                                        CoinBigIndex kce, const int *hrow)
    01534 { return presolve_find_minor1(row,kcs,kce,hrow) ; }
    01535
    01542 inline CoinBigIndex presolve_find_col1(int col, CoinBigIndex krs,
    01543                                        CoinBigIndex kre, const int *hcol)
    01544 { return presolve_find_minor1(col,krs,kre,hcol) ; }
    01545
    01554 CoinBigIndex presolve_find_minor2(int tgt, CoinBigIndex ks, int majlen,
    01555                                   const int *minndxs,
    01556                                   const CoinBigIndex *majlinks) ;
    01557
    01565 inline CoinBigIndex presolve_find_row2(int row, CoinBigIndex kcs, int collen,
    01566                                        const int *hrow,
    01567                                        const CoinBigIndex *clinks)
    01568 { return presolve_find_minor2(row,kcs,collen,hrow,clinks) ; }
    01569
    01578 CoinBigIndex presolve_find_minor3(int tgt, CoinBigIndex ks, int majlen,
    01579                                   const int *minndxs,
    01580                                   const CoinBigIndex *majlinks) ;
    01581
    01589 inline CoinBigIndex presolve_find_row3(int row, CoinBigIndex kcs, int collen,
    01590                                        const int *hrow,
    01591                                        const CoinBigIndex *clinks)
    01592 { return presolve_find_minor3(row,kcs,collen,hrow,clinks) ; }
    01593
    01603 inline void presolve_delete_from_major(int majndx, int minndx,
    01604                                 const CoinBigIndex *majstrts,
    01605                                 int *majlens, int *minndxs, double *els)
    01606 { CoinBigIndex ks = majstrts[majndx] ;
    01607   CoinBigIndex ke = ks + majlens[majndx] ;
    01608
    01609   CoinBigIndex kmi = presolve_find_minor(minndx,ks,ke,minndxs) ;
    01610
    01611   minndxs[kmi] = minndxs[ke-1] ;
    01612   els[kmi] = els[ke-1] ;
    01613   majlens[majndx]-- ;
    01614
    01615   return ; }
    01616 // Delete all marked from major (and zero marked)
    01617 inline void presolve_delete_many_from_major(int majndx, char * marked,
    01618                                 const CoinBigIndex *majstrts,
    01619                                 int *majlens, int *minndxs, double *els)
    01620 {
    01621   CoinBigIndex ks = majstrts[majndx] ;
    01622   CoinBigIndex ke = ks + majlens[majndx] ;
    01623   CoinBigIndex put=ks;
    01624   for (CoinBigIndex k=ks;k<ke;k++) {
    01625     int iMinor = minndxs[k];
    01626     if (!marked[iMinor]) {
    01627       minndxs[put]=iMinor;
    01628       els[put++]=els[k];
    01629     } else {
    01630       marked[iMinor]=0;
    01631     }
    01632   }
    01633   majlens[majndx] = put-ks ;
    01634   return ;
    01635 }
    01636
    01647 inline void presolve_delete_from_col(int row, int col,
    01648                                      const CoinBigIndex *mcstrt,
    01649                                      int *hincol, int *hrow, double *colels)
    01650 { presolve_delete_from_major(col,row,mcstrt,hincol,hrow,colels) ; }
    01651
    01662 inline void presolve_delete_from_row(int row, int col,
    01663                                      const CoinBigIndex *mrstrt,
    01664                                      int *hinrow, int *hcol, double *rowels)
    01665 { presolve_delete_from_major(row,col,mrstrt,hinrow,hcol,rowels) ; }
    01666
    01677 void presolve_delete_from_major2 (int majndx, int minndx,
    01678                                   CoinBigIndex *majstrts, int *majlens,
    01679                                   int *minndxs, /*double *els,*/ int *majlinks,
    01680                                    CoinBigIndex *free_listp) ;
    01681
    01692 inline void presolve_delete_from_col2(int row, int col, CoinBigIndex *mcstrt,
    01693                                       int *hincol, int *hrow,
    01694                                       /*double *colels,*/ int *clinks,
    01695                                       CoinBigIndex *free_listp)
    01696 { presolve_delete_from_major2(col,row,mcstrt,hincol,hrow,/*colels,*/clinks,
    01697                               free_listp) ; }
    01698
    01700
    01706
    01718 double *presolve_dupmajor(const double *elems, const int *indices,
    01719                           int length, CoinBigIndex offset, int tgt = -1);
    01721 void coin_init_random_vec(double *work, int n);
    01723
    01724
    01725 #endif