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ISBDDVARINSUPPORT(3)		 BDD FUNCTIONS		  ISBDDVARINSUPPORT(3)

NAME
       isbddvarinsupport - tests if a variable appears in a bdd.

SYNOPSIS
       #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 BddSys-
	      tem->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 );

SEE ALSO
       bdd(1)

ASIM/LIP6			October	1, 1997		  ISBDDVARINSUPPORT(3)

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