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author | Georgey | 2017-07-05 11:40:43 +0530 |
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committer | Georgey | 2017-07-05 11:40:43 +0530 |
commit | 938fef4a37a7b7c61b4b6ff74cb4cfd2f100c427 (patch) | |
tree | b343c0ee5609433c80e0de1db8b6886c9126dc2d /thirdparty/linux/include/coin/CbcClique.hpp | |
parent | 5b72577efe080c5294b32d804e4d26351fef30bc (diff) | |
download | FOSSEE-Optimization-toolbox-938fef4a37a7b7c61b4b6ff74cb4cfd2f100c427.tar.gz FOSSEE-Optimization-toolbox-938fef4a37a7b7c61b4b6ff74cb4cfd2f100c427.tar.bz2 FOSSEE-Optimization-toolbox-938fef4a37a7b7c61b4b6ff74cb4cfd2f100c427.zip |
Added linux shared libraries and header files for int and ecos functions
Diffstat (limited to 'thirdparty/linux/include/coin/CbcClique.hpp')
-rw-r--r-- | thirdparty/linux/include/coin/CbcClique.hpp | 303 |
1 files changed, 303 insertions, 0 deletions
diff --git a/thirdparty/linux/include/coin/CbcClique.hpp b/thirdparty/linux/include/coin/CbcClique.hpp new file mode 100644 index 0000000..e21e027 --- /dev/null +++ b/thirdparty/linux/include/coin/CbcClique.hpp @@ -0,0 +1,303 @@ +// $Id: CbcClique.hpp 1899 2013-04-09 18:12:08Z stefan $ +// 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 11/9/2009-- carved out of CbcBranchActual + +#ifndef CbcClique_H +#define CbcClique_H + +/** \brief Branching object for cliques + + A clique is defined to be a set of binary variables where fixing any one + variable to its `strong' value fixes all other variables. An example is the + most common SOS1 construction: a set of binary variables x_j s.t. SUM{j} + x_j = 1. Setting any one variable to 1 forces all other variables to 0. + (See comments for CbcSOS below.) + + Other configurations are possible, however: Consider x1-x2+x3 <= 0. + Setting x1 (x3) to 1 forces x2 to 1 and x3 (x1) to 0. Setting x2 to 0 + forces x1 and x3 to 0. + + The proper point of view to take when interpreting CbcClique is + `generalisation of SOS1 on binary variables.' To get into the proper frame + of mind, here's an example. + + Consider the following sequence, where x_j = (1-y_j): + \verbatim + x1 + x2 + x3 <= 1 all strong at 1 + x1 - y2 + x3 <= 0 y2 strong at 0; x1, x3 strong at 1 + -y1 - y2 + x3 <= -1 y1, y2 strong at 0, x3 strong at 1 + -y1 - y2 - y3 <= -2 all strong at 0 + \endverbatim + The first line is a standard SOS1 on binary variables. + + Variables with +1 coefficients are `SOS-style' and variables with -1 + coefficients are `non-SOS-style'. So #numberNonSOSMembers_ simply tells you + how many variables have -1 coefficients. The implicit rhs for a clique is + 1-numberNonSOSMembers_. +*/ +class CbcClique : public CbcObject { + +public: + + /// Default Constructor + CbcClique (); + + /** Useful constructor (which are integer indices) slack can denote a slack + in set. If type == NULL then as if 1 + */ + CbcClique (CbcModel * model, int cliqueType, int numberMembers, + const int * which, const char * type, + int identifier, int slack = -1); + + /// Copy constructor + CbcClique ( const CbcClique &); + + /// Clone + virtual CbcObject * clone() const; + + /// Assignment operator + CbcClique & operator=( const CbcClique& rhs); + + /// Destructor + virtual ~CbcClique (); + + /// Infeasibility - large is 0.5 + virtual double infeasibility(const OsiBranchingInformation * info, + int &preferredWay) const; + + using CbcObject::feasibleRegion ; + /// This looks at solution and sets bounds to contain solution + virtual void feasibleRegion(); + + /// Creates a branching object + virtual CbcBranchingObject * createCbcBranch(OsiSolverInterface * solver, const OsiBranchingInformation * info, int way) ; + /// Number of members + inline int numberMembers() const { + return numberMembers_; + } + /** \brief Number of variables with -1 coefficient + + Number of non-SOS members, i.e., fixing to zero is strong. + See comments at head of class, and comments for #type_. + */ + inline int numberNonSOSMembers() const { + return numberNonSOSMembers_; + } + + /// Members (indices in range 0 ... numberIntegers_-1) + inline const int * members() const { + return members_; + } + + /*! \brief Type of each member, i.e., which way is strong. + + This also specifies whether a variable has a +1 or -1 coefficient. + - 0 => -1 coefficient, 0 is strong value + - 1 => +1 coefficient, 1 is strong value + If unspecified, all coefficients are assumed to be positive. + + Indexed as 0 .. numberMembers_-1 + */ + inline char type(int index) const { + if (type_) return type_[index]; + else return 1; + } + + /// Clique type: 0 is <=, 1 is == + inline int cliqueType() const { + return cliqueType_; + } + /// Redoes data when sequence numbers change + virtual void redoSequenceEtc(CbcModel * model, int numberColumns, const int * originalColumns); + +protected: + /// data + /// Number of members + int numberMembers_; + + /// Number of Non SOS members i.e. fixing to zero is strong + int numberNonSOSMembers_; + + /// Members (indices in range 0 ... numberIntegers_-1) + int * members_; + + /** \brief Strong value for each member. + + This also specifies whether a variable has a +1 or -1 coefficient. + - 0 => -1 coefficient, 0 is strong value + - 1 => +1 coefficient, 1 is strong value + If unspecified, all coefficients are assumed to be positive. + + Indexed as 0 .. numberMembers_-1 + */ + char * type_; + + /** \brief Clique type + + 0 defines a <= relation, 1 an equality. The assumed value of the rhs is + numberNonSOSMembers_+1. (See comments for the class.) + */ + int cliqueType_; + + /** \brief Slack variable for the clique + + Identifies the slack variable for the clique (typically added to convert + a <= relation to an equality). Value is sequence number within clique + menbers. + */ + int slack_; +}; + +/** Branching object for unordered cliques + + Intended for cliques which are long enough to make it worthwhile + but <= 64 members. There will also be ones for long cliques. + + Variable_ is the clique id number (redundant, as the object also holds a + pointer to the clique. + */ +class CbcCliqueBranchingObject : public CbcBranchingObject { + +public: + + // Default Constructor + CbcCliqueBranchingObject (); + + // Useful constructor + CbcCliqueBranchingObject (CbcModel * model, const CbcClique * clique, + int way, + int numberOnDownSide, const int * down, + int numberOnUpSide, const int * up); + + // Copy constructor + CbcCliqueBranchingObject ( const CbcCliqueBranchingObject &); + + // Assignment operator + CbcCliqueBranchingObject & operator=( const CbcCliqueBranchingObject& rhs); + + /// Clone + virtual CbcBranchingObject * clone() const; + + // Destructor + virtual ~CbcCliqueBranchingObject (); + + using CbcBranchingObject::branch ; + /// Does next branch and updates state + virtual double branch(); + + using CbcBranchingObject::print ; + /** \brief Print something about branch - only if log level high + */ + virtual void print(); + + /** Return the type (an integer identifier) of \c this */ + virtual CbcBranchObjType type() const { + return CliqueBranchObj; + } + + /** Compare the original object of \c this with the original object of \c + brObj. Assumes that there is an ordering of the original objects. + This method should be invoked only if \c this and brObj are of the same + type. + Return negative/0/positive depending on whether \c this is + smaller/same/larger than the argument. + */ + virtual int compareOriginalObject(const CbcBranchingObject* brObj) const; + + /** Compare the \c this with \c brObj. \c this and \c brObj must be of the + same type and must have the same original object, but they may have + different feasible regions. + Return the appropriate CbcRangeCompare value (first argument being the + sub/superset if that's the case). In case of overlap (and if \c + replaceIfOverlap is true) replace the current branching object with one + whose feasible region is the overlap. + */ + virtual CbcRangeCompare compareBranchingObject + (const CbcBranchingObject* brObj, const bool replaceIfOverlap = false); + +private: + /// data + const CbcClique * clique_; + /// downMask - bit set to fix to weak bounds, not set to leave unfixed + unsigned int downMask_[2]; + /// upMask - bit set to fix to weak bounds, not set to leave unfixed + unsigned int upMask_[2]; +}; + +/** Unordered Clique Branching Object class. + These are for cliques which are > 64 members + Variable is number of clique. + */ +class CbcLongCliqueBranchingObject : public CbcBranchingObject { + +public: + + // Default Constructor + CbcLongCliqueBranchingObject (); + + // Useful constructor + CbcLongCliqueBranchingObject (CbcModel * model, const CbcClique * clique, + int way, + int numberOnDownSide, const int * down, + int numberOnUpSide, const int * up); + + // Copy constructor + CbcLongCliqueBranchingObject ( const CbcLongCliqueBranchingObject &); + + // Assignment operator + CbcLongCliqueBranchingObject & operator=( const CbcLongCliqueBranchingObject& rhs); + + /// Clone + virtual CbcBranchingObject * clone() const; + + // Destructor + virtual ~CbcLongCliqueBranchingObject (); + + using CbcBranchingObject::branch ; + /// Does next branch and updates state + virtual double branch(); + + using CbcBranchingObject::print ; + /** \brief Print something about branch - only if log level high + */ + virtual void print(); + + /** Return the type (an integer identifier) of \c this */ + virtual CbcBranchObjType type() const { + return LongCliqueBranchObj; + } + + /** Compare the original object of \c this with the original object of \c + brObj. Assumes that there is an ordering of the original objects. + This method should be invoked only if \c this and brObj are of the same + type. + Return negative/0/positive depending on whether \c this is + smaller/same/larger than the argument. + */ + virtual int compareOriginalObject(const CbcBranchingObject* brObj) const; + + /** Compare the \c this with \c brObj. \c this and \c brObj must be os the + same type and must have the same original object, but they may have + different feasible regions. + Return the appropriate CbcRangeCompare value (first argument being the + sub/superset if that's the case). In case of overlap (and if \c + replaceIfOverlap is true) replace the current branching object with one + whose feasible region is the overlap. + */ + virtual CbcRangeCompare compareBranchingObject + (const CbcBranchingObject* brObj, const bool replaceIfOverlap = false); + +private: + /// data + const CbcClique * clique_; + /// downMask - bit set to fix to weak bounds, not set to leave unfixed + unsigned int * downMask_; + /// upMask - bit set to fix to weak bounds, not set to leave unfixed + unsigned int * upMask_; +}; + +#endif + |