New cpp folder structure

Signed-off-by: Alexander Borsuk <me@alex.bio>

libs/pyhelpers/vector_uint8.hpp

@@ -0,0 +1,59 @@
+#pragma once
+
+#include <vector>
+
+// These headers are necessary for cross-python compilation.
+// Python3 does not have PyString_* methods. One should use PyBytes_* instead.
+// bytesobject.h contains a mapping from PyBytes_* to PyString_*.
+// See https://docs.python.org/2/howto/cporting.html for more.
+#include "Python.h"
+#include "bytesobject.h"
+
+#include <boost/python.hpp>
+#include <boost/python/suite/indexing/map_indexing_suite.hpp>
+
+namespace
+{
+using namespace boost::python;
+
+// Converts a vector<uint8_t> to Python2 str or Python3 bytes.
+struct vector_uint8t_to_str
+{
+  static PyObject * convert(std::vector<uint8_t> const & v)
+  {
+    auto bytes = PyBytes_FromStringAndSize(
+        reinterpret_cast<char const *>(v.data()),
+        v.size());
+    Py_INCREF(bytes);
+
+    return bytes;
+  }
+};
+
+// Converts a vector<uint8_t> from Python2 str or Python3 bytes.
+struct vector_uint8t_from_python_str
+{
+  vector_uint8t_from_python_str()
+  {
+    converter::registry::push_back(&convertible, &construct, type_id<std::vector<uint8_t>>());
+  }
+
+  static void * convertible(PyObject * obj_ptr)
+  {
+    if (!PyBytes_Check(obj_ptr))
+      return nullptr;
+    return obj_ptr;
+  }
+
+  static void construct(PyObject * obj_ptr, converter::rvalue_from_python_stage1_data * data)
+  {
+    const char * value = PyBytes_AsString(obj_ptr);
+    if (value == nullptr)
+      throw_error_already_set();
+    void * storage =
+        ((converter::rvalue_from_python_storage<std::vector<uint8_t>> *)data)->storage.bytes;
+    new (storage) std::vector<uint8_t>(value, value + PyBytes_Size(obj_ptr));
+    data->convertible = storage;
+  }
+};
+}  // namespace