1 files changed, 109 insertions, 0 deletions
diff --git a/src/sat/bsat/satTrace.c b/src/sat/bsat/satTrace.c
new file mode 100644
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+++ b/src/sat/bsat/satTrace.c
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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                                ///
+////////////////////////////////////////////////////////////////////////
+
+