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 reader_lp.h 26 * @ingroup FILEREADERS 27 * @brief LP file reader 28 * @author Tobias Achterberg 29 * 30 * This reader allows to parse and write CPLEX .lp files with linear and quadratic constraints and objective, 31 * special ordered sets of type 1 and 2, indicators on linear constraints, and semicontinuous variables. 32 * For writing, linear (general and specialized), indicator, quadratic, second order cone, and 33 * special ordered set constraints are supported. 34 * 35 * The lp format is defined within the CPLEX documentation. 36 */ 37 38 /*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/ 39 40 #ifndef __SCIP_READER_LP_H__ 41 #define __SCIP_READER_LP_H__ 42 43 #include "scip/def.h" 44 #include "scip/type_cons.h" 45 #include "scip/type_prob.h" 46 #include "scip/type_reader.h" 47 #include "scip/type_result.h" 48 #include "scip/type_retcode.h" 49 #include "scip/type_scip.h" 50 #include "scip/type_var.h" 51 52 #ifdef __cplusplus 53 extern "C" { 54 #endif 55 56 /** includes the lp file reader into SCIP 57 * 58 * @ingroup FileReaderIncludes 59 */ 60 SCIP_EXPORT 61 SCIP_RETCODE SCIPincludeReaderLp( 62 SCIP* scip /**< SCIP data structure */ 63 ); 64 65 /**@addtogroup FILEREADERS 66 * 67 * @{ 68 */ 69 70 /** reads problem from file */ 71 SCIP_EXPORT 72 SCIP_RETCODE SCIPreadLp( 73 SCIP* scip, /**< SCIP data structure */ 74 SCIP_READER* reader, /**< the file reader itself */ 75 const char* filename, /**< full path and name of file to read, or NULL if stdin should be used */ 76 SCIP_RESULT* result /**< pointer to store the result of the file reading call */ 77 ); 78 79 /** writes problem to file */ 80 SCIP_EXPORT 81 SCIP_RETCODE SCIPwriteLp( 82 SCIP* scip, /**< SCIP data structure */ 83 FILE* file, /**< output file, or NULL if standard output should be used */ 84 const char* name, /**< problem name */ 85 SCIP_Bool transformed, /**< TRUE iff problem is the transformed problem */ 86 SCIP_OBJSENSE objsense, /**< objective sense */ 87 SCIP_Real objscale, /**< scalar applied to objective function; external objective value is 88 * extobj = objsense * objscale * (intobj + objoffset) */ 89 SCIP_Real objoffset, /**< objective offset from bound shifting and fixing */ 90 SCIP_VAR** vars, /**< array with active variables ordered binary, integer, implicit, continuous */ 91 int nvars, /**< number of active variables in the problem */ 92 int nbinvars, /**< number of binary variables */ 93 int nintvars, /**< number of general integer variables */ 94 int nimplvars, /**< number of implicit integer variables */ 95 int ncontvars, /**< number of continuous variables */ 96 SCIP_CONS** conss, /**< array with constraints of the problem */ 97 int nconss, /**< number of constraints in the problem */ 98 SCIP_RESULT* result /**< pointer to store the result of the file writing call */ 99 ); 100 101 /** @} */ 102 103 #ifdef __cplusplus 104 } 105 #endif 106 107 #endif 108