python: faulty unpackers::bnd bindings

It would require to add an implementation to Bnd directly to convert it
to a Python class. Committing for history but gonna revert it before
merge.

bindings/python/src/lib.rs

@@ -1,8 +1,20 @@
 use std::collections::HashMap;
 
 use pyo3::wrap_pymodule;
+use pyo3::exceptions::RuntimeError;
 use pyo3::prelude::*;
 
+fn runtime_error(message: String) -> PyErr {
+    RuntimeError::py_err(message)
+}
+
+fn wrap_ironring_errors<T, E: std::fmt::Debug>(result: Result<T, E>) -> PyResult<T> {
+    match result {
+        Ok(r) => Ok(r),
+        Err(e) => Err(runtime_error(format!("{:?}", e))),
+    }
+}
+
 #[pymodule]
 fn name_hashes(_py: Python, m: &PyModule) -> PyResult<()> {
     use ironring::name_hashes::*;
@@ -26,7 +38,26 @@ fn name_hashes(_py: Python, m: &PyModule) -> PyResult<()> {
 }
 
 #[pymodule]
-fn pyironring(_py: Python, m: &PyModule) -> PyResult<()> {
+fn unpack_bnd(_py: Python, m: &PyModule) -> PyResult<()> {
-    m.add_wrapped(wrap_pymodule!(name_hashes))?;
+    use ironring::unpackers::bnd::*;
+    use ironring::parsers::bnd::Bnd;
+
+    #[pyfn(m, "load_bnd_file")]
+    fn py_load_bnd_file(_py: Python, bnd_path: &str) -> PyResult<(Bnd, Vec<u8>)> {
+        wrap_ironring_errors(load_bnd_file(bnd_path))
+    }
+
+    #[pyfn(m, "load_bnd")]
+    fn py_load_bnd(_py: Python, bnd_data: &[u8]) -> PyResult<Bnd> {
+        wrap_ironring_errors(load_bnd(bnd_data))
+    }
+
+    Ok(())
+}
+
+#[pymodule]
+fn pyironring(_py: Python, m: &PyModule) -> PyResult<()> {
+    m.add_wrapped(wrap_pymodule!(name_hashes))?;
+    m.add_wrapped(wrap_pymodule!(unpack_bnd))?;
     Ok(())
 }