From d41418272136def42a408d0e2cc44e0d6327924a Mon Sep 17 00:00:00 2001
From: John Zhao <johnzhao@slightech.com>
Date: Fri, 18 May 2018 00:16:04 +0800
Subject: [PATCH] Add api create to python wrapper

---
 wrappers/python/README.md          |   2 +-
 wrappers/python/samples/mynteye.py |  37 ++++++++++
 wrappers/python/src/mynteye_py.cc  | 111 ++++++++++++++++++++++++++++-
 3 files changed, 148 insertions(+), 2 deletions(-)
 create mode 100644 wrappers/python/samples/mynteye.py

diff --git a/wrappers/python/README.md b/wrappers/python/README.md
index a7555b4..092da4d 100644
--- a/wrappers/python/README.md
+++ b/wrappers/python/README.md
@@ -14,5 +14,5 @@ make python
 ## Run
 
 ```bash
-python
+python wrappers/python/samples/mynteye.py
 ```
diff --git a/wrappers/python/samples/mynteye.py b/wrappers/python/samples/mynteye.py
new file mode 100644
index 0000000..593720b
--- /dev/null
+++ b/wrappers/python/samples/mynteye.py
@@ -0,0 +1,37 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# Copyright 2018 Slightech Co., Ltd. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# pylint: disable=missing-docstring
+
+from __future__ import print_function
+
+import os
+import sys
+
+PY_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+sys.path.append(os.path.join(PY_DIR, '_output/lib'))
+
+import mynteye_py  # pylint: disable=import-error,wrong-import-position
+# glog_init = mynteye_py.glog_init.create(sys.argv)
+
+
+def main():
+  # api = mynteye_py.api.create()  # should glog_init
+  api = mynteye_py.api.create(sys.argv)  # pylint: disable=unused-variable
+
+
+if __name__ == '__main__':
+  main()
diff --git a/wrappers/python/src/mynteye_py.cc b/wrappers/python/src/mynteye_py.cc
index eac12b6..d966d49 100644
--- a/wrappers/python/src/mynteye_py.cc
+++ b/wrappers/python/src/mynteye_py.cc
@@ -1,5 +1,114 @@
+// Copyright 2018 Slightech Co., Ltd. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
 #include <boost/python.hpp>
+#include <boost/python/stl_iterator.hpp>
+
+#include <vector>
+
+#include "mynteye/api.h"
+#include "mynteye/glog_init.h"
+
+namespace {
+
+template <typename T>
+inline void std_vector_assign(
+    std::vector<T> &l, const boost::python::object &o) {  // NOLINT
+  l.assign(
+      boost::python::stl_input_iterator<T>(o),
+      boost::python::stl_input_iterator<T>());
+}
+
+template <typename T>
+inline std::vector<T> py_list_to_std_vector(const boost::python::object &o) {
+  return std::vector<T>(
+      boost::python::stl_input_iterator<T>(o),
+      boost::python::stl_input_iterator<T>());
+}
+
+template <typename T>
+inline boost::python::list std_vector_to_py_list(const std::vector<T> &v) {
+  boost::python::list l;
+  for (auto &&val : v) {
+    l.append(val);
+  }
+  return l;
+}
+
+template <typename Container>
+char **new_cstrings(const Container &strings, std::size_t n) {
+  char **cstrings = new char *[n];
+  for (std::size_t i = 0; i < n; i++) {
+    cstrings[i] = new char[strings[i].size() + 1];
+    std::strcpy(cstrings[i], strings[i].c_str());  // NOLINT
+  }
+  return cstrings;
+}
+
+void del_cstrings(char **cstrings, std::size_t n) {
+  for (std::size_t i = 0; i < n; i++) {
+    delete[] cstrings[i];
+  }
+  delete[] cstrings;
+}
+
+}  // namespace
 
 using namespace boost::python;  // NOLINT
 
-BOOST_PYTHON_MODULE(mynteye_py) {}
+MYNTEYE_USE_NAMESPACE
+
+// api create static methods
+
+std::shared_ptr<API> (*api_create_1)() = &API::Create;
+
+std::shared_ptr<API> api_create_2(list argv) {
+  auto &&args = py_list_to_std_vector<std::string>(argv);
+  auto &&n = args.size();
+  if (n == 0) {
+    return API::Create();
+  }
+  char **cstrings = new_cstrings(args, n);
+  auto &&api = API::Create(args.size(), cstrings);
+  del_cstrings(cstrings, n);
+  return api;
+}
+
+// glog_init create static methods
+
+std::shared_ptr<glog_init> glog_init_create(list argv) {
+  auto &&args = py_list_to_std_vector<std::string>(argv);
+  auto &&n = args.size();
+  assert(n > 0);
+  char **cstrings = new_cstrings(args, n);
+  auto &&ret = std::make_shared<glog_init>(args.size(), cstrings);
+  del_cstrings(cstrings, n);
+  return ret;
+}
+
+// BOOST_PYTHON_MODULE
+
+BOOST_PYTHON_MODULE(mynteye_py) {
+  class_<API, boost::noncopyable>("api", no_init)
+      .def("create", api_create_1)
+      .def("create", &api_create_2)
+      .staticmethod("create");
+
+  register_ptr_to_python<std::shared_ptr<API>>();
+
+  class_<glog_init, boost::noncopyable>("glog_init", no_init)
+      .def("create", &glog_init_create)
+      .staticmethod("create");
+
+  register_ptr_to_python<std::shared_ptr<glog_init>>();
+}