1 files changed, 46 insertions, 0 deletions
diff --git a/src/py_utils.cc b/src/py_utils.cc
new file mode 100644
index 00000000..0f82d683
--- /dev/null
+++ b/src/py_utils.cc
@@ -0,0 +1,46 @@
+#include "pyinterp.h"
+#include "pyutils.h"
+
+#include <boost/python/module.hpp>
+#include <boost/python/def.hpp>
+#include <boost/python/to_python_converter.hpp>
+
+namespace ledger {
+
+using namespace boost::python;
+
+struct string_to_python
+{
+  static PyObject* convert(const string& str)
+  {
+    return incref(object(*boost::polymorphic_downcast<const std::string *>(&str)).ptr());
+  }
+};
+   
+struct string_from_python
+{
+  static void* convertible(PyObject* obj_ptr)
+  {
+    if (!PyString_Check(obj_ptr)) return 0;
+    return obj_ptr;
+  }
+
+  static void construct(PyObject* obj_ptr, converter::rvalue_from_python_stage1_data* data)
+  {
+    const char* value = PyString_AsString(obj_ptr);
+    if (value == 0) throw_error_already_set();
+    void* storage = ((converter::rvalue_from_python_storage<string>*) data)->storage.bytes;
+    new (storage) string(value);
+    data->convertible = storage;
+  }
+};
+
+typedef register_python_conversion<string, string_to_python, string_from_python>
+  string_python_conversion;
+
+void export_utils()
+{
+  string_python_conversion();
+}
+
+} // namespace ledger