# Low-level API: binary format readers

Read-only classes mirroring nind's on-disk formats, layered as described
in {doc}`../architecture`. Their hot-path lookups and shared structural
diagnostics (`analyseFichierPadFile`/`analyseFichierIndex`) delegate to
the compiled `nind._native` extension; only the remaining per-format
diagnostic/introspection methods (`dumpeFichier` and similar) still parse
the binary format directly in Python. They can open files written by
either this package's own {class}`~nind.nind_engine.NindIndexer` or the
C++ implementation.

## nind.NindFile

```{eval-rst}
.. automodule:: nind.NindFile
   :no-members:

.. autofunction:: nind.NindFile.clefA
.. autofunction:: nind.NindFile.clefB
.. autofunction:: nind.NindFile.catNb2Str

.. autoclass:: nind.NindFile.NindFile
   :members:
```

## nind.NindPadFile

```{eval-rst}
.. automodule:: nind.NindPadFile
   :no-members:

.. autoclass:: nind.NindPadFile.NindPadFile
   :members:
   :show-inheritance:

.. autofunction:: nind.NindPadFile.chercheVides
.. autofunction:: nind.NindPadFile.calculeRejpartition
```

## nind.NindIndex

```{eval-rst}
.. automodule:: nind.NindIndex
   :no-members:

.. autoclass:: nind.NindIndex.NindIndex
   :members:
   :show-inheritance:
```

## nind.NindRetrolexicon

```{eval-rst}
.. automodule:: nind.NindRetrolexicon
   :no-members:

.. autoclass:: nind.NindRetrolexicon.NindRetrolexicon
   :members:
   :show-inheritance:
```

## nind.NindLexiconindex

```{eval-rst}
.. automodule:: nind.NindLexiconindex
   :no-members:

.. autoclass:: nind.NindLexiconindex.NindLexiconindex
   :members:
   :show-inheritance:
```

## nind.NindTermindex

```{eval-rst}
.. automodule:: nind.NindTermindex
   :no-members:

.. autoclass:: nind.NindTermindex.NindTermindex
   :members:
   :show-inheritance:
```

## nind.NindLocalindex

```{eval-rst}
.. automodule:: nind.NindLocalindex
   :no-members:

.. autoclass:: nind.NindLocalindex.NindLocalindex
   :members:
   :show-inheritance:
```