1 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ 2 /* */ 3 /* This file is part of the program and library */ 4 /* SCIP --- Solving Constraint Integer Programs */ 5 /* */ 6 /* Copyright (C) 2002-2021 Konrad-Zuse-Zentrum */ 7 /* fuer Informationstechnik Berlin */ 8 /* */ 9 /* SCIP is distributed under the terms of the ZIB Academic License. */ 10 /* */ 11 /* You should have received a copy of the ZIB Academic License */ 12 /* along with SCIP; see the file COPYING. If not visit scipopt.org. */ 13 /* */ 14 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ 15 16 /**@file type_lp.h 17 * @brief type definitions for LP management 18 * @author Tobias Achterberg 19 */ 20 21 /*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/ 22 23 #ifndef __SCIP_TYPE_LP_H__ 24 #define __SCIP_TYPE_LP_H__ 25 26 #ifdef __cplusplus 27 extern "C" { 28 #endif 29 30 /** solution status after solving LP */ 31 enum SCIP_LPSolStat 32 { 33 SCIP_LPSOLSTAT_NOTSOLVED = 0, /**< LP was not solved, no solution exists */ 34 SCIP_LPSOLSTAT_OPTIMAL = 1, /**< LP was solved to optimality */ 35 SCIP_LPSOLSTAT_INFEASIBLE = 2, /**< LP is primal infeasible */ 36 SCIP_LPSOLSTAT_UNBOUNDEDRAY = 3, /**< LP has a primal unbounded ray */ 37 SCIP_LPSOLSTAT_OBJLIMIT = 4, /**< objective limit was reached during optimization */ 38 SCIP_LPSOLSTAT_ITERLIMIT = 5, /**< iteration limit was reached during optimization */ 39 SCIP_LPSOLSTAT_TIMELIMIT = 6, /**< time limit was reached during optimization */ 40 SCIP_LPSOLSTAT_ERROR = 7 /**< an error occured during optimization */ 41 }; 42 typedef enum SCIP_LPSolStat SCIP_LPSOLSTAT; 43 44 /** type of variable bound: lower or upper bound */ 45 enum SCIP_BoundType 46 { 47 SCIP_BOUNDTYPE_LOWER = 0, /**< lower bound */ 48 SCIP_BOUNDTYPE_UPPER = 1 /**< upper bound */ 49 }; 50 typedef enum SCIP_BoundType SCIP_BOUNDTYPE; 51 52 /** type of row side: left hand or right hand side */ 53 enum SCIP_SideType 54 { 55 SCIP_SIDETYPE_LEFT = 0, /**< left hand side */ 56 SCIP_SIDETYPE_RIGHT = 1 /**< right hand side */ 57 }; 58 typedef enum SCIP_SideType SCIP_SIDETYPE; 59 60 /** type of origin of row */ 61 enum SCIP_RowOriginType 62 { 63 SCIP_ROWORIGINTYPE_UNSPEC = 0, /**< unspecified origin of row */ 64 SCIP_ROWORIGINTYPE_CONSHDLR = 1, /**< row created by a constraint handler */ 65 SCIP_ROWORIGINTYPE_CONS = 2, /**< row created by a constraint */ 66 SCIP_ROWORIGINTYPE_SEPA = 3, /**< row created by separator */ 67 SCIP_ROWORIGINTYPE_REOPT = 4 /**< row created by reoptimization */ 68 }; 69 typedef enum SCIP_RowOriginType SCIP_ROWORIGINTYPE; 70 71 /** type of LP algorithm */ 72 enum SCIP_LPAlgo 73 { 74 SCIP_LPALGO_PRIMALSIMPLEX = 0, /**< primal simplex */ 75 SCIP_LPALGO_DUALSIMPLEX = 1, /**< dual simplex */ 76 SCIP_LPALGO_BARRIER = 2, /**< barrier algorithm */ 77 SCIP_LPALGO_BARRIERCROSSOVER = 3 /**< barrier algorithm with crossover */ 78 }; 79 typedef enum SCIP_LPAlgo SCIP_LPALGO; 80 81 typedef struct SCIP_ColSolVals SCIP_COLSOLVALS; /**< collected values of a column which depend on the LP solution */ 82 typedef struct SCIP_RowSolVals SCIP_ROWSOLVALS; /**< collected values of a row which depend on the LP solution */ 83 typedef struct SCIP_LpSolVals SCIP_LPSOLVALS; /**< collected values of the LP data which depend on the LP solution */ 84 85 /** column of an LP 86 * 87 * - \ref PublicColumnMethods "List of all available methods" 88 */ 89 typedef struct SCIP_Col SCIP_COL; 90 91 /** row of an LP 92 * 93 * - \ref PublicRowMethods "List of all available methods" 94 */ 95 typedef struct SCIP_Row SCIP_ROW; 96 97 /** LP structure 98 * 99 * - \ref PublicLPMethods "List of all available methods" 100 */ 101 typedef struct SCIP_Lp SCIP_LP; 102 103 #ifdef __cplusplus 104 } 105 #endif 106 107 #endif 108