lemon/lp.h
author Peter Kovacs <kpeter@inf.elte.hu>
Thu, 12 Nov 2009 23:30:45 +0100
changeset 809 22bb98ca0101
parent 462 9b082b3fb33f
child 877 141f9c0db4a3
permissions -rw-r--r--
Entirely rework CostScaling (#180)

- Use the new interface similarly to NetworkSimplex.
- Rework the implementation using an efficient internal structure
for handling the residual network. This improvement made the
code much faster.
- Handle GEQ supply type (LEQ is not supported).
- Handle infinite upper bounds.
- Handle negative costs (for arcs of finite upper bound).
- Traits class + named parameter for the LargeCost type used in
internal computations.
- Extend the documentation.
     1 /* -*- mode: C++; indent-tabs-mode: nil; -*-
     2  *
     3  * This file is a part of LEMON, a generic C++ optimization library.
     4  *
     5  * Copyright (C) 2003-2008
     6  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
     7  * (Egervary Research Group on Combinatorial Optimization, EGRES).
     8  *
     9  * Permission to use, modify and distribute this software is granted
    10  * provided that this copyright notice appears in all copies. For
    11  * precise terms see the accompanying LICENSE file.
    12  *
    13  * This software is provided "AS IS" with no warranty of any kind,
    14  * express or implied, and with no claim as to its suitability for any
    15  * purpose.
    16  *
    17  */
    18 
    19 #ifndef LEMON_LP_H
    20 #define LEMON_LP_H
    21 
    22 #include<lemon/config.h>
    23 
    24 
    25 #ifdef LEMON_HAVE_GLPK
    26 #include <lemon/glpk.h>
    27 #elif LEMON_HAVE_CPLEX
    28 #include <lemon/cplex.h>
    29 #elif LEMON_HAVE_SOPLEX
    30 #include <lemon/soplex.h>
    31 #elif LEMON_HAVE_CLP
    32 #include <lemon/clp.h>
    33 #endif
    34 
    35 ///\file
    36 ///\brief Defines a default LP solver
    37 ///\ingroup lp_group
    38 namespace lemon {
    39 
    40 #ifdef DOXYGEN
    41   ///The default LP solver identifier
    42 
    43   ///The default LP solver identifier.
    44   ///\ingroup lp_group
    45   ///
    46   ///Currently, the possible values are \c GLPK, \c CPLEX,
    47   ///\c SOPLEX or \c CLP
    48 #define LEMON_DEFAULT_LP SOLVER
    49   ///The default LP solver
    50 
    51   ///The default LP solver.
    52   ///\ingroup lp_group
    53   ///
    54   ///Currently, it is either \c GlpkLp, \c CplexLp, \c SoplexLp or \c ClpLp
    55   typedef GlpkLp Lp;
    56 
    57   ///The default MIP solver identifier
    58 
    59   ///The default MIP solver identifier.
    60   ///\ingroup lp_group
    61   ///
    62   ///Currently, the possible values are \c GLPK or \c CPLEX
    63 #define LEMON_DEFAULT_MIP SOLVER
    64   ///The default MIP solver.
    65 
    66   ///The default MIP solver.
    67   ///\ingroup lp_group
    68   ///
    69   ///Currently, it is either \c GlpkMip or \c CplexMip
    70   typedef GlpkMip Mip;
    71 #else
    72 #ifdef LEMON_HAVE_GLPK
    73 # define LEMON_DEFAULT_LP GLPK
    74   typedef GlpkLp Lp;
    75 # define LEMON_DEFAULT_MIP GLPK
    76   typedef GlpkMip Mip;
    77 #elif LEMON_HAVE_CPLEX
    78 # define LEMON_DEFAULT_LP CPLEX
    79   typedef CplexLp Lp;
    80 # define LEMON_DEFAULT_MIP CPLEX
    81   typedef CplexMip Mip;
    82 #elif LEMON_HAVE_SOPLEX
    83 # define DEFAULT_LP SOPLEX
    84   typedef SoplexLp Lp;
    85 #elif LEMON_HAVE_CLP
    86 # define DEFAULT_LP CLP
    87   typedef ClpLp Lp;  
    88 #endif
    89 #endif
    90 
    91 } //namespace lemon
    92 
    93 #endif //LEMON_LP_H