From 4812c90424dfc40d26725244723887a2d16ddfd9 Mon Sep 17 00:00:00 2001
From: Alan Mishchenko <alanmi@berkeley.edu>
Date: Mon, 1 Oct 2007 08:01:00 -0700
Subject: Version abc71001

---
 src/aig/cnf/cnfMan.c | 202 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 202 insertions(+)
 create mode 100644 src/aig/cnf/cnfMan.c

(limited to 'src/aig/cnf/cnfMan.c')

diff --git a/src/aig/cnf/cnfMan.c b/src/aig/cnf/cnfMan.c
new file mode 100644
index 00000000..1edc012a
--- /dev/null
+++ b/src/aig/cnf/cnfMan.c
@@ -0,0 +1,202 @@
+/**CFile****************************************************************
+
+  FileName    [cnfMan.c]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [AIG-to-CNF conversion.]
+
+  Synopsis    []
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - April 28, 2007.]
+
+  Revision    [$Id: cnfMan.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "cnf.h"
+#include "satSolver.h"
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+static inline int Cnf_Lit2Var( int Lit )        { return (Lit & 1)? -(Lit >> 1)-1 : (Lit >> 1)+1;  }
+static inline int Cnf_Lit2Var2( int Lit )       { return (Lit & 1)? -(Lit >> 1)   : (Lit >> 1);    }
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFINITIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+  Synopsis    [Starts the fraiging manager.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Cnf_Man_t * Cnf_ManStart()
+{
+    Cnf_Man_t * p;
+    int i;
+    // allocate the manager
+    p = ALLOC( Cnf_Man_t, 1 );
+    memset( p, 0, sizeof(Cnf_Man_t) );
+    // derive internal data structures
+    Cnf_ReadMsops( &p->pSopSizes, &p->pSops );
+    // allocate memory manager for cuts
+    p->pMemCuts = Aig_MmFlexStart();
+    p->nMergeLimit = 10;
+    // allocate temporary truth tables
+    p->pTruths[0] = ALLOC( unsigned, 4 * Aig_TruthWordNum(p->nMergeLimit) );
+    for ( i = 1; i < 4; i++ )
+        p->pTruths[i] = p->pTruths[i-1] + Aig_TruthWordNum(p->nMergeLimit);
+    p->vMemory = Vec_IntAlloc( 1 << 18 );
+    return p;
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Stops the fraiging manager.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Cnf_ManStop( Cnf_Man_t * p )
+{
+    Vec_IntFree( p->vMemory );
+    free( p->pTruths[0] );
+    Aig_MmFlexStop( p->pMemCuts, 0 );
+    free( p->pSopSizes );
+    free( p->pSops[1] );
+    free( p->pSops );
+    free( p );
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Returns the array of CI IDs.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Vec_Int_t * Cnf_DataCollectPiSatNums( Cnf_Dat_t * pCnf, Aig_Man_t * p )
+{
+    Vec_Int_t * vCiIds;
+    Aig_Obj_t * pObj;
+    int i;
+    vCiIds = Vec_IntAlloc( Aig_ManPiNum(p) );
+    Aig_ManForEachPi( p, pObj, i )
+        Vec_IntPush( vCiIds, pCnf->pVarNums[pObj->Id] );
+    return vCiIds;
+}
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Cnf_DataFree( Cnf_Dat_t * p )
+{
+    if ( p == NULL )
+        return;
+    free( p->pClauses[0] );
+    free( p->pClauses );
+    free( p->pVarNums );
+    free( p );
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Writes CNF into a file.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Cnf_DataWriteIntoFile( Cnf_Dat_t * p, char * pFileName, int fReadable )
+{
+    FILE * pFile;
+    int * pLit, * pStop, i;
+    pFile = fopen( pFileName, "w" );
+    if ( pFile == NULL )
+    {
+        printf( "Cnf_WriteIntoFile(): Output file cannot be opened.\n" );
+        return;
+    }
+    fprintf( pFile, "c Result of efficient AIG-to-CNF conversion using package CNF\n" );
+    fprintf( pFile, "p %d %d\n", p->nVars, p->nClauses );
+    for ( i = 0; i < p->nClauses; i++ )
+    {
+        for ( pLit = p->pClauses[i], pStop = p->pClauses[i+1]; pLit < pStop; pLit++ )
+            fprintf( pFile, "%d ", fReadable? Cnf_Lit2Var2(*pLit) : Cnf_Lit2Var(*pLit) );
+        fprintf( pFile, "0\n" );
+    }
+    fprintf( pFile, "\n" );
+    fclose( pFile );
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Writes CNF into a file.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void * Cnf_DataWriteIntoSolver( Cnf_Dat_t * p )
+{
+    sat_solver * pSat;
+    int i, status;
+    pSat = sat_solver_new();
+    sat_solver_setnvars( pSat, p->nVars );
+    for ( i = 0; i < p->nClauses; i++ )
+    {
+        if ( !sat_solver_addclause( pSat, p->pClauses[i], p->pClauses[i+1] ) )
+        {
+            sat_solver_delete( pSat );
+            return NULL;
+        }
+    }
+    status = sat_solver_simplify(pSat);
+    if ( status == 0 )
+    {
+        sat_solver_delete( pSat );
+        return NULL;
+    }
+    return pSat;
+}
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+
-- 
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