reader_lp.h

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/*                  This file is part of the program and library             */
/*         SCIP --- Solving Constraint Integer Programs                      */
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/*    Copyright (C) 2002-2021 Konrad-Zuse-Zentrum                            */
/*                            fuer Informationstechnik Berlin                */
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/*  SCIP is distributed under the terms of the ZIB Academic License.         */
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/**@file   reader_lp.h
 * @ingroup FILEREADERS
 * @brief  LP file reader
 * @author Tobias Achterberg
 *
 * This reader allows to parse and write CPLEX .lp files with linear and quadratic constraints and objective,
 * special ordered sets of type 1 and 2, indicators on linear constraints, and semicontinuous variables.
 * For writing, linear (general and specialized), indicator, quadratic, second order cone, and
 * special ordered set constraints are supported.
 *
 * The lp format is defined within the CPLEX documentation.
 */

/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/

#ifndef __SCIP_READER_LP_H__
#define __SCIP_READER_LP_H__

#include "scip/def.h"
#include "scip/type_cons.h"
#include "scip/type_prob.h"
#include "scip/type_reader.h"
#include "scip/type_result.h"
#include "scip/type_retcode.h"
#include "scip/type_scip.h"
#include "scip/type_var.h"

#ifdef __cplusplus
extern "C" {
#endif

/** includes the lp file reader into SCIP
 *
 *  @ingroup FileReaderIncludes
 */
SCIP_EXPORT
SCIP_RETCODE SCIPincludeReaderLp(
   SCIP*                 scip                /**< SCIP data structure */
   );

/**@addtogroup FILEREADERS
 *
 * @{
 */

/** reads problem from file */
SCIP_EXPORT
SCIP_RETCODE SCIPreadLp(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_READER*          reader,             /**< the file reader itself */
   const char*           filename,           /**< full path and name of file to read, or NULL if stdin should be used */
   SCIP_RESULT*          result              /**< pointer to store the result of the file reading call */
   );

/** writes problem to file */
SCIP_EXPORT
SCIP_RETCODE SCIPwriteLp(
   SCIP*                 scip,               /**< SCIP data structure */
   FILE*                 file,               /**< output file, or NULL if standard output should be used */
   const char*           name,               /**< problem name */
   SCIP_Bool             transformed,        /**< TRUE iff problem is the transformed problem */
   SCIP_OBJSENSE         objsense,           /**< objective sense */
   SCIP_Real             objscale,           /**< scalar applied to objective function; external objective value is
                                              * extobj = objsense * objscale * (intobj + objoffset) */
   SCIP_Real             objoffset,          /**< objective offset from bound shifting and fixing */
   SCIP_VAR**            vars,               /**< array with active variables ordered binary, integer, implicit, continuous */
   int                   nvars,              /**< number of active variables in the problem */
   int                   nbinvars,           /**< number of binary variables */
   int                   nintvars,           /**< number of general integer variables */
   int                   nimplvars,          /**< number of implicit integer variables */
   int                   ncontvars,          /**< number of continuous variables */
   SCIP_CONS**           conss,              /**< array with constraints of the problem */
   int                   nconss,             /**< number of constraints in the problem */
   SCIP_RESULT*          result              /**< pointer to store the result of the file writing call */
   );

/** @} */

#ifdef __cplusplus
}
#endif

#endif