reader_wbo.c

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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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/*                  This file is part of the program and library             */
/*         SCIP --- Solving Constraint Integer Programs                      */
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/*  Copyright (c) 2002-2025 Zuse Institute Berlin (ZIB)                      */
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/**@file   reader_wbo.c
 * @ingroup DEFPLUGINS_READER
 * @brief  WBO file reader (OPB format with weighted constraints)
 * @author Michael Winkler
 */
 
/* For file format description see opb-reader. */
 
/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
 
#include "scip/pub_message.h"
#include "scip/pub_reader.h"
#include "scip/reader_opb.h"
#include "scip/reader_wbo.h"
#include "scip/scip_exact.h"
#include "scip/scip_reader.h"
#include <string.h>
 
#define READER_NAME             "wboreader"
#define READER_DESC             "file reader for pseudoboolean wbo file format"
#define READER_EXTENSION        "wbo"
 
/*
 * Callback methods of reader
 */
 
/** copy method for reader plugins (called when SCIP copies plugins) */
static
SCIP_DECL_READERCOPY(readerCopyWbo)
{  /*lint --e{715}*/
   assert(scip != NULL);
   assert(reader != NULL);
   assert(strcmp(SCIPreaderGetName(reader), READER_NAME) == 0);
 
   /* call inclusion method of reader */
   SCIP_CALL( SCIPincludeReaderWbo(scip) );
 
   return SCIP_OKAY;
}
 
 
/** problem reading method of reader */
static
SCIP_DECL_READERREAD(readerReadWbo)
{  /*lint --e{715}*/
 
   SCIP_CALL( SCIPreadOpb(scip, reader, filename, result) );
 
   return SCIP_OKAY;
}
 
 
/** problem writing method of reader */
static
SCIP_DECL_READERWRITE(readerWriteWbo)
{  /*lint --e{715}*/
   assert(reader != NULL);
   assert(strcmp(SCIPreaderGetName(reader), READER_NAME) == 0);
 
   if( SCIPisExact(scip) )
   {
      SCIPerrorMessage("WBO reader cannot yet write problems in exact solving mode\n");
      return SCIP_WRITEERROR;
   }
 
   SCIP_CALL( SCIPwriteOpb(scip, file, name, transformed, objsense, objoffset, objscale, objoffsetexact, objscaleexact,
         vars, nvars, nbinvars, nintvars, nimplvars, ncontvars, fixedvars, nfixedvars, conss, nconss, genericnames, result) );
 
   return SCIP_OKAY;
}
 
 
/*
 * reader specific interface methods
 */
 
/** includes the wbo file reader in SCIP */
SCIP_RETCODE SCIPincludeReaderWbo(
   SCIP*                 scip                /**< SCIP data structure */
   )
{
   SCIP_READER* reader;
 
   /* include reader with opb data */
   SCIP_CALL( SCIPincludeReaderBasic(scip, &reader, READER_NAME, READER_DESC, READER_EXTENSION, SCIPreaderGetData(SCIPfindReader(scip, "opbreader"))) );
 
   assert(reader != NULL);
 
   /* reader is safe to use in exact solving mode, but exact writing still needs to be implemented (in OPB reader) */
   SCIPreaderMarkExact(reader);
 
   /* set non fundamental callbacks via setter functions */
   SCIP_CALL( SCIPsetReaderCopy(scip, reader, readerCopyWbo) );
   SCIP_CALL( SCIPsetReaderRead(scip, reader, readerReadWbo) );
   SCIP_CALL( SCIPsetReaderWrite(scip, reader, readerWriteWbo) );
 
   return SCIP_OKAY;
}