NAME

       unsetbddrefext - increments the internal reference, and decrements the external reference of a bdd node.

SYNOPSYS

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

PARAMETERS

       BddNode             The bdd node.

DESCRIPTION

       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 !"
              The BddNode must have a postive number of external reference.

EXAMPLE

       #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 );

SEE ALSO

       bdd(1)

ASIM/LIP6                                        October 1, 1997                               UNSETBDDREFEXT(3)