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setbddrefext

NAME

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

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SYNOPSYS

 #include "bdd101.h"
 bddnode *setbddrefext( BddNode )
   bddnode *BddNode;
 

PARAMETERS

BddNode

The bdd node.

DESCRIPTION

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

RETURN VALUE

setbddrefext returns the BddNode pointer.

ERRORS

"negative reference, index xxx error !"

The BddNode must have a postive number of internal 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 );
    incbddrefint( BddNode );
    setbddrefext( BddNode );
    /* displays Node VAR: 0  INDEX: 2  MARK: 0  REF_EXT: 1  REF_INT: 0 */
    viewbddnode( (bddsystem *)0, BddNode );
    /* displays (not i0) */
    viewablexpr( Expr, ABL_VIEW_VHDL );
    freeablexpr( Expr );
    destroybddsystem( (bddsystem *)0 );
    destroybddcircuit( (bddcircuit *)0 );
 

SEE ALSO

bdd(1)

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