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

# addbddnode(3)

adds a new bdd node in the bdd system.

## NAME

addbddnode - adds a new **bdd** node in the **bdd** system.

## SYNOPSYS

```
#include "bdd101.h"
bddnode ∗addbddnode( BddSystem, Index, High, Low  )
  bddsystem ∗BddSystem;
  bddindex   Index;
  bddnode   ∗High;
  bddnode   ∗Low;
```

## PARAMETERS

- *BddSystem*

  The **bdd** system.

- *Index*

  The **bdd** index.

- *High*

  The **bdd** high pointer.

- *Low*

  The **bdd** low pointer.

## DESCRIPTION

**addbddnode** adds a new node with the index *Index*, *High* as HIGH pointer, and *Low* as LOW pointer in the **bdd** system *BddSystem*. If the **bdd** node exist already **addbddnode** return its pointer. If a null pointer is given, the default **bdd** system is used.\

## RETURN VALUE

**addbddnode** returns a pointer to the resulting **bdd** node with its number of external reference incremented.

## ERRORS

**"index xxx out of range"**

The *Index* parameter must be a valid index.

## EXAMPLE

```
#include "bdd101.h"
   bddsystem  ∗BddSystem;
   bddcircuit ∗BddCircuit;
   bddnode    ∗BddNode;
   chain_list ∗Expr;
   BddSystem  = createbddsystem( 100, 1000, 100, 50000 );
   BddCircuit = createbddcircuit( "hello_world", 10, 10, BddSystem );
   BddNode = addbddcircuitin( (bddcircuit ∗)0, "i0", 0, BDD_IN_MODE_FIRST );
   BddNode = addbddnode( (bddsystem ∗)0, BddNode->INDEX, BddNode->LOW, BddNode->HIGH );
   Expr = convertbddcircuitabl( (bddcircuit ∗)0, BddNode );
   /* displays (not i0) */
   viewablexpr( Expr, ABL_VIEW_VHDL );
   freeablexpr( Expr );
   destroybddsystem( (bddsystem ∗)0 );
   destroybddcircuit( (bddcircuit ∗)0 );
```

## SEE ALSO

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