---
name: "getbddnodesupport"
section: "3"
platform: "linux"
package: "alliance"
version: "5.1.1-3"
release: "Debian 10 (Buster)"
platforms: ["linux"]
url: "https://new.carta.tech/getbddnodesupport"
---

# getbddnodesupport(3)

gives the variable support of a bdd node.

## NAME

getbddnodesupport - gives the variable support of a **bdd** node.

## SYNOPSYS

```
#include "bdd101.h"
void ∗getbddnodesupport( BddSystem, BddNode, Mode )
  bddsystem ∗BddSystem;
  bddnode   ∗BddNode;
  int        Mode;
```

## PARAMETERS

- *BddSystem*

  The **bdd** system.

- *BddNode*

  The **bdd** node.

- *Mode*

  The type of support.

## DESCRIPTION

**getbddnodesupport** gives the support of the **bdd** node *BddNode* in the **bdd** system *BddSystem*. If a null pointer is given, the default **bdd** system is used. If *Mode* is BDD\_SUPPORT\_CHAIN the support is returned using  *chain\_list* else it is returned using *ptype\_list*. The support must be freed using the *freechain* or *freeptype* functions.\

## RETURN VALUE

**getablexprsupport** returns a pointer to a *chain\_list* or a *ptype\_list*.

## EXAMPLE

```
#include "bdd101.h"
   bddsystem  ∗BddSystem;
   bddcircuit ∗BddCircuit;
   bddnode    ∗BddNode;
   chain_list ∗Expr;
   chain_list ∗Support;
   chain_list ∗ScanSupport;
   bddindex       Index;
   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 );
   Support = getablbddnodesupport( (bddsystem ∗0), BddNode, BDD_SUPPORT_CHAIN );
   for ( ScanSupport  = Support;
         ScanSupport != (chain_list ∗)0;
         ScanSupport  = ScanSupport->NEXT )
   {
     Index = (bddnode ∗)ScanSupport->INDEX;
     printf( "%s ", BddCircuit->NAME_IN[ Index - BDD_INDEX_MIN ] );
   }
   freechain( Support );
   destroybddsystem( (bddsystem ∗)0 );
   destroybddcircuit( (bddcircuit ∗)0 );
```

## SEE ALSO

[**bdd**(1)](/bdd/1.md)