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

# addbddcircuitin(3)

adds an input in a bdd circuit.

## NAME

addbddcircuitin - adds an input in a **bdd** circuit.

## SYNOPSYS

```
#include "bdd101.h"
bddnode ∗addbddcircuitin( BddCircuit, InputName, Index, Mode )
  bddcircuit ∗BddCircuit;
  char       ∗InputName;
  bddindex    Index;
  long        Mode;
```

## PARAMETERS

- *BddCircuit*

  The **bdd** circuit.

- *InputName*

  The name of the input.

- *Index*

  The **bdd** index of the input.

- *Mode*

  The mode.

## DESCRIPTION

**addbddcircuitin** adds an input *InputName* in the **bdd** circuit *BddCircuit*. If a null pointer is given, the default **bdd** circuit is used. If the input *InputName* exists already, its node pointer is returned. The *Mode* parameter specifies how to create the new variable associated to the name *InputName*. The *Index* parameter is used with the  BDD\_IN\_MODE\_BEFORE and BDD\_IN\_MODE\_AFTER mode.  The *Mode* parameter can takes the following values  :

- BDD\_IN\_MODE\_FIRST

  adds a variable before all others.

- BDD\_IN\_MODE\_LAST

  adds a variable after all others.

- BDD\_IN\_MODE\_BEFORE

  adds a variable before the one specified by *Index*.

- BDD\_IN\_MODE\_AFTER

  adds a variable after the one specified by *Index*.

- BDD\_IN\_MODE\_IMPOSE

  if this flag is set, only the variables found in the *BddCircuit* are taken into account. It permits to merge variables from different circuit working on the same **bdd** system.\

## RETURN VALUE

**addbddcircuitin** returns a pointer to the new created node.

## ERRORS

**"unknwon in mode xxx error !"**

The *Mode* parameter must be defined.

## EXAMPLE

```
#include "bdd101.h"
   bddsystem  ∗BddSystem;
   bddcircuit ∗BddCircuit;
   bddnode    ∗BddNode;
   BddSystem  = createbddsystem( 100, 1000, 100, 50000 );
   BddCircuit = createbddcircuit( "hello_world", 10, 10, BddSystem );
   addbddcircuitin ( (bddcircuit ∗)0, "i0", 0, BDD_IN_MODE_FIRST );
   ...
   BddNode = searchbddcircuitin( (bddcircuit ∗)0, "i0" );
   destroybddsystem( (bddsystem ∗)0 );
   destroybddcircuit( (bddcircuit ∗)0 );
```

## SEE ALSO

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