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+/**CFile****************************************************************
+
+ FileName [satTrace.c]
+
+ SystemName [ABC: Logic synthesis and verification system.]
+
+ PackageName [SAT sat_solver.]
+
+ Synopsis [Records the trace of SAT solving in the CNF form.]
+
+ Author [Alan Mishchenko]
+
+ Affiliation [UC Berkeley]
+
+ Date [Ver. 1.0. Started - June 20, 2005.]
+
+ Revision [$Id: satTrace.c,v 1.4 2005/09/16 22:55:03 casem Exp $]
+
+***********************************************************************/
+
+#include <stdio.h>
+#include <assert.h>
+#include "satSolver.h"
+
+/*
+ The trace of SAT solving contains the original clause of the problem
+ along with the learned clauses derived during SAT solving.
+ The first line of the resulting file contains 3 numbers instead of 2:
+ c <num_vars> <num_all_clauses> <num_root_clauses>
+*/
+
+////////////////////////////////////////////////////////////////////////
+/// DECLARATIONS ///
+////////////////////////////////////////////////////////////////////////
+
+
+////////////////////////////////////////////////////////////////////////
+/// FUNCTION DEFINITIONS ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+ Synopsis [Start the trace recording.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Sat_SolverTraceStart( sat_solver * pSat, char * pName )
+{
+ assert( pSat->pFile == NULL );
+ pSat->pFile = fopen( pName, "w" );
+ fprintf( pSat->pFile, " \n" );
+ pSat->nClauses = 0;
+ pSat->nRoots = 0;
+}
+
+/**Function*************************************************************
+
+ Synopsis [Stops the trace recording.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Sat_SolverTraceStop( sat_solver * pSat )
+{
+ if ( pSat->pFile == NULL )
+ return;
+ rewind( pSat->pFile );
+ fprintf( pSat->pFile, "p %d %d %d", sat_solver_nvars(pSat), pSat->nClauses, pSat->nRoots );
+ fclose( pSat->pFile );
+ pSat->pFile = NULL;
+}
+
+
+/**Function*************************************************************
+
+ Synopsis [Writes one clause into the trace file.]
+
+ Description []
+
+ SideEffects []
+
+ SeeAlso []
+
+***********************************************************************/
+void Sat_SolverTraceWrite( sat_solver * pSat, int * pBeg, int * pEnd, int fRoot )
+{
+ if ( pSat->pFile == NULL )
+ return;
+ pSat->nClauses++;
+ pSat->nRoots += fRoot;
+ for ( ; pBeg < pEnd ; pBeg++ )
+ fprintf( pSat->pFile, " %d", lit_print(*pBeg) );
+ fprintf( pSat->pFile, " 0\n" );
+}
+
+////////////////////////////////////////////////////////////////////////
+/// END OF FILE ///
+////////////////////////////////////////////////////////////////////////
+
+