NAME

isbddvarinsupport - tests if a variable appears in a bdd.

See the file buster/alliance/alc_origin.1.en.gz.

SYNOPSYS

#include "bdd101.h"
int isbddvarinsupport( BddSystem, BddNode, Variable )


  bddsystem ∗BddSystem;


  bddnode   ∗BddNode;


  bddvar     Variable;

PARAMETERS

BddSystem: The bdd system.
BddNode: The bdd node.
Variable: The variable number.

DESCRIPTION

isbddvarinsupport tests if the variable number Variable appears in the support of the bdd node BddNode, in the bdd system BddSystem. If a null pointer is given, the default bdd system is used.

RETURN VALUE

isbddvarinsupport returns 1 if Variable appears, 0 otherwise.

ERRORS

"variable xxx out of range, error !"

The Variable parameter must be less or equal to the BddSystem->NUMBER_VAR field.

EXAMPLE

#include "bdd101.h"


   bddsystem  ∗BddSystem;


   bddcircuit ∗BddCircuit;


   bddnode    ∗BddNode;


   bddnode    ∗BddVariable;


   chain_list ∗Expr;


   bddvar         Variable;


   BddSystem  = createbddsystem( 100, 1000, 100, 50000 );


   BddCircuit = createbddcircuit( "hello_world", 10, 10, BddSystem );


   Expr = createablbinexpr( ABL_AND,


                            createablatom( "i0" ),


                            createablatom( "i1" ) );


   BddNode = addbddcircuitabl( BddCircuit, Expr );


   freeablexpr( Expr );


   BddVariable = searchbddcircuitin( (bddcircuit ∗)0, "i0" );


   Variable = getbddvarbyindex( (bddsystem ∗ 0), BddVariable->INDEX ) );


   /* displays 1 */


   printf( "%d", isbddvarinsupport( (bddsystem ∗)0, BddNode, Variable ) );


   destroybddsystem( (bddsystem ∗)0 );


   destroybddcircuit( (bddcircuit ∗)0 );