restrictbddnode3

Synopsys

#include "bdd101.h"
bddnode ∗restrictbddnode( BddSystem, BddNode, Variable, BddSubst )
  bddsystem ∗BddSystem;
  bddnode   ∗BddNode;
  bddvar     Variable;
  bddnode   ∗BddSubst;

Parameters

Overview

restrictbddnode substitutes all the occurency of the variable Variable in the bdd node BddNode by the bdd node BddSubst, in the bdd system BddSystem. If a null pointer is given, the default bdd system is used. The BddSubst must be a the node BddSystem->ONE or BddSystem->ZERO.

Return value

restrictbddnode returns the resulting bdd node.

Errors

"variable xxx out of range, error !"

"index xxx out of range, error !"

Examples

#include "bdd101.h"
   bddsystem  ∗BddSystem;
   bddcircuit ∗BddCircuit;
   bddnode    ∗BddVariable;
   bddnode    ∗BddNode;
   bddnode    ∗BddSubst;
   chain_list ∗Expr;
   bddvar         Variable;
   BddSystem  = createbddsystem( 100, 1000, 100, 50000 );
   BddCircuit = createbddcircuit( "hello_world", 10, 10, BddSystem );
   Expr = createablbinexpr( ABL_OR,
                            createablatom( "i0" ),
                            createablatom( "i1" ) );
   BddNode = addbddcircuitabl( BddCircuit, Expr );
   freeablexpr( Expr );
   BddSubst = BddSystem->ONE;
   BddVariable = searchbddcircuitin( (bddcircuit ∗)0, "i0" );
   Variable = getbddvarbyindex( (bddsystem ∗)0, BddVariable->INDEX );
   BddNode = restrictbddnode( (bddsystem ∗)0, BddNode, Variable, BddSubst );
   Expr = convertbddcircuitabl( BddCircuit, BddNode );
   /* displays '1' */
   viewablexpr( Expr, ABL_VIEW_VHDL );
   freeablexpr( Expr );
   destroybddsystem( (bddsystem ∗)0 );
   destroybddcircuit( (bddcircuit ∗)0 );