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2    	/*                                                                           */
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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.         */
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12   	/*      http://www.apache.org/licenses/LICENSE-2.0                           */
13   	/*                                                                           */
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15   	/*  distributed under the License is distributed on an "AS IS" BASIS,        */
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19   	/*                                                                           */
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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