unsetbddrefext3

Synopsys

#include "bdd101.h"
bddnode ∗unsetbddrefext( BddNode )
  bddnode ∗BddNode;

Parameters

BddNode

The bdd node.

Overview

unsetbddrefext increments the number of internal reference of the bdd node BddNode and decrements its number of external reference.

Return value

unsetbddrefext returns the BddNode pointer.

Errors

"negative reference, index xxx error !"

Examples

#include "bdd101.h"
   bddsystem  ∗BddSystem;
   bddcircuit ∗BddCircuit;
   bddnode    ∗BddNode;
   chain_list ∗Expr;
   BddSystem  = createbddsystem( 100, 1000, 100, 50000 );
   BddCircuit = createbddcircuit( "hello_world", 10, 10, BddSystem );
   BddNode = addbddcircuitin( (bddcircuit ∗)0, "i0", 0, BDD_IN_MODE_FIRST );
   BddNode = addbddnode( (bddsystem ∗)0, BddNode->INDEX, BddNode->LOW, BddNode->HIGH );
   Expr = convertbddcircuitabl( (bddcircuit ∗)0, BddNode );
   incbddrefext( BddNode );
   unsetbddrefext( BddNode );
   /* displays Node VAR: 0  INDEX: 2  MARK: 0  REF_EXT: 0  REF_INT: 1 */
   viewbddnode( (bddsystem ∗)0, BddNode );
   /* displays (not i0) */
   viewablexpr( Expr, ABL_VIEW_VHDL );
   freeablexpr( Expr );
   destroybddsystem( (bddsystem ∗)0 );
   destroybddcircuit( (bddcircuit ∗)0 );