1 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ 2 /* */ 3 /* This file is part of the program and library */ 4 /* SCIP --- Solving Constraint Integer Programs */ 5 /* */ 6 /* Copyright (c) 2002-2023 Zuse Institute Berlin (ZIB) */ 7 /* */ 8 /* Licensed under the Apache License, Version 2.0 (the "License"); */ 9 /* you may not use this file except in compliance with the License. */ 10 /* You may obtain a copy of the License at */ 11 /* */ 12 /* http://www.apache.org/licenses/LICENSE-2.0 */ 13 /* */ 14 /* Unless required by applicable law or agreed to in writing, software */ 15 /* distributed under the License is distributed on an "AS IS" BASIS, */ 16 /* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */ 17 /* See the License for the specific language governing permissions and */ 18 /* limitations under the License. */ 19 /* */ 20 /* You should have received a copy of the Apache-2.0 license */ 21 /* along with SCIP; see the file LICENSE. If not visit scipopt.org. */ 22 /* */ 23 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ 24 25 /**@file type_lp.h 26 * @brief type definitions for LP management 27 * @author Tobias Achterberg 28 */ 29 30 /*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/ 31 32 #ifndef __SCIP_TYPE_LP_H__ 33 #define __SCIP_TYPE_LP_H__ 34 35 #ifdef __cplusplus 36 extern "C" { 37 #endif 38 39 /** solution status after solving LP */ 40 enum SCIP_LPSolStat 41 { 42 SCIP_LPSOLSTAT_NOTSOLVED = 0, /**< LP was not solved, no solution exists */ 43 SCIP_LPSOLSTAT_OPTIMAL = 1, /**< LP was solved to optimality */ 44 SCIP_LPSOLSTAT_INFEASIBLE = 2, /**< LP is primal infeasible */ 45 SCIP_LPSOLSTAT_UNBOUNDEDRAY = 3, /**< LP has a primal unbounded ray */ 46 SCIP_LPSOLSTAT_OBJLIMIT = 4, /**< objective limit was reached during optimization */ 47 SCIP_LPSOLSTAT_ITERLIMIT = 5, /**< iteration limit was reached during optimization */ 48 SCIP_LPSOLSTAT_TIMELIMIT = 6, /**< time limit was reached during optimization */ 49 SCIP_LPSOLSTAT_ERROR = 7 /**< an error occured during optimization */ 50 }; 51 typedef enum SCIP_LPSolStat SCIP_LPSOLSTAT; 52 53 /** type of variable bound: lower or upper bound */ 54 enum SCIP_BoundType 55 { 56 SCIP_BOUNDTYPE_LOWER = 0, /**< lower bound */ 57 SCIP_BOUNDTYPE_UPPER = 1 /**< upper bound */ 58 }; 59 typedef enum SCIP_BoundType SCIP_BOUNDTYPE; 60 61 /** type of row side: left hand or right hand side */ 62 enum SCIP_SideType 63 { 64 SCIP_SIDETYPE_LEFT = 0, /**< left hand side */ 65 SCIP_SIDETYPE_RIGHT = 1 /**< right hand side */ 66 }; 67 typedef enum SCIP_SideType SCIP_SIDETYPE; 68 69 /** type of origin of row */ 70 enum SCIP_RowOriginType 71 { 72 SCIP_ROWORIGINTYPE_UNSPEC = 0, /**< unspecified origin of row */ 73 SCIP_ROWORIGINTYPE_CONSHDLR = 1, /**< row created by a constraint handler */ 74 SCIP_ROWORIGINTYPE_CONS = 2, /**< row created by a constraint */ 75 SCIP_ROWORIGINTYPE_SEPA = 3, /**< row created by separator */ 76 SCIP_ROWORIGINTYPE_REOPT = 4 /**< row created by reoptimization */ 77 }; 78 typedef enum SCIP_RowOriginType SCIP_ROWORIGINTYPE; 79 80 /** type of LP algorithm */ 81 enum SCIP_LPAlgo 82 { 83 SCIP_LPALGO_PRIMALSIMPLEX = 0, /**< primal simplex */ 84 SCIP_LPALGO_DUALSIMPLEX = 1, /**< dual simplex */ 85 SCIP_LPALGO_BARRIER = 2, /**< barrier algorithm */ 86 SCIP_LPALGO_BARRIERCROSSOVER = 3 /**< barrier algorithm with crossover */ 87 }; 88 typedef enum SCIP_LPAlgo SCIP_LPALGO; 89 90 typedef struct SCIP_ColSolVals SCIP_COLSOLVALS; /**< collected values of a column which depend on the LP solution */ 91 typedef struct SCIP_RowSolVals SCIP_ROWSOLVALS; /**< collected values of a row which depend on the LP solution */ 92 typedef struct SCIP_LpSolVals SCIP_LPSOLVALS; /**< collected values of the LP data which depend on the LP solution */ 93 94 /** column of an LP 95 * 96 * - \ref PublicColumnMethods "List of all available methods" 97 */ 98 typedef struct SCIP_Col SCIP_COL; 99 100 /** row of an LP 101 * 102 * - \ref PublicRowMethods "List of all available methods" 103 */ 104 typedef struct SCIP_Row SCIP_ROW; 105 106 /** LP structure 107 * 108 * - \ref PublicLPMethods "List of all available methods" 109 */ 110 typedef struct SCIP_Lp SCIP_LP; 111 112 #ifdef __cplusplus 113 } 114 #endif 115 116 #endif 117