addbddvarbefore(3)

NAME

addbddvarbefore - adds a new variable, before an existing one.

SYNOPSYS

#include "bdd101.h"
bddnode ∗addbddvarbefore( BddSystem )
  bddsystem ∗BddSystem;
  bddindex      Index;

PARAMETERS

BddSystem: The bdd system.

Index: The bdd index of an existing variable.

DESCRIPTION

addbddvarbefore creates a new variable, with the number BddSystem->INDEX_TO_VAR[ Index ] in the bdd system BddSystem. If a null pointer is given, the default bdd system is used.

RETURN VALUE

addbddvarbefore returns a pointer to the bdd node of the new variable.

ERRORS

"no more variables, error !"

There is no variable number left.

"index xxx out of range, error !"

The Index parameter must be a valid index.

EXAMPLE

#include "bdd101.h"
   bddsystem  ∗BddSystem;
   bddnode    ∗BddNode1;
   bddnode    ∗BddNode2;
   BddSystem  = createbddsystem( 100, 1000, 100, 50000 );
   BddNode1 = addbddvarfirst( (bddsystem ∗)0 );
   BddNode2 = addbddvarbefore( (bddsystem ∗)0, BddNode1->INDEX );
   destroybddsystem( (bddsystem ∗)0 );