Scippy

SCIP

Solving Constraint Integer Programs

reader_pip.h
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1 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
2 /* */
3 /* This file is part of the program and library */
4 /* SCIP --- Solving Constraint Integer Programs */
5 /* */
6 /* Copyright (C) 2002-2014 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 email to scip@zib.de. */
13 /* */
14 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
15 
16 /**@file reader_pip.h
17  * @ingroup FILEREADERS
18  * @brief file reader for polynomial mixed-integer programs in PIP format
19  * @author Stefan Vigerske
20  *
21  * This reader allows to parse and write PIP files with linear and polynomial constraints and objective.
22  * For writing, linear (general and specialized), quadratic, and "and" constraints are supported.
23  * Also abspower, bivariate, and nonlinear constraints may be written, if they are representable as polynomials.
24  *
25  * The PIP format is similar to the LP format and defined at http://polip.zib.de/pipformat.php .
26  */
27 
28 /*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
29 
30 #ifndef __SCIP_READER_PIP_H__
31 #define __SCIP_READER_PIP_H__
32 
33 
34 #include "scip/scip.h"
35 
36 #ifdef __cplusplus
37 extern "C" {
38 #endif
39 
40 /** includes the pip file reader into SCIP */
41 extern
43  SCIP* scip /**< SCIP data structure */
44  );
45 
46 /** reads problem from file */
47 extern
49  SCIP* scip, /**< SCIP data structure */
50  SCIP_READER* reader, /**< the file reader itself */
51  const char* filename, /**< full path and name of file to read, or NULL if stdin should be used */
52  SCIP_RESULT* result /**< pointer to store the result of the file reading call */
53  );
54 
55 /** writes problem to file */
56 extern
58  SCIP* scip, /**< SCIP data structure */
59  FILE* file, /**< output file, or NULL if standard output should be used */
60  const char* name, /**< problem name */
61  SCIP_Bool transformed, /**< TRUE iff problem is the transformed problem */
62  SCIP_OBJSENSE objsense, /**< objective sense */
63  SCIP_Real objscale, /**< scalar applied to objective function; external objective value is
64  * extobj = objsense * objscale * (intobj + objoffset) */
65  SCIP_Real objoffset, /**< objective offset from bound shifting and fixing */
66  SCIP_VAR** vars, /**< array with active variables ordered binary, integer, implicit, continuous */
67  int nvars, /**< number of active variables in the problem */
68  int nbinvars, /**< number of binary variables */
69  int nintvars, /**< number of general integer variables */
70  int nimplvars, /**< number of implicit integer variables */
71  int ncontvars, /**< number of continuous variables */
72  SCIP_CONS** conss, /**< array with constraints of the problem */
73  int nconss, /**< number of constraints in the problem */
74  SCIP_RESULT* result /**< pointer to store the result of the file writing call */
75  );
76 
77 #ifdef __cplusplus
78 }
79 #endif
80 
81 #endif
82