small improvements (#10)

* make main loop more explicit

* add Doxyfile

* update GH actions

.github/workflows/code_style.yml

@@ -1,23 +1,15 @@
 name: Check code style
 
-on: [push, pull_request]
+on: [push]
 
 jobs:
-  build:
+  check-style:
+    name: Code style check
     runs-on: ubuntu-latest
-
     steps:
       - uses: actions/checkout@v2
-      - name: clang-format
-        uses: DoozyX/[email protected]
-        with:
-          source: "./src"
-          clangFormatVersion: 11
-          inplace: True
-      - uses: EndBug/add-and-commit@v4
+      - name: Run clang-format style check for C/C++ code
+        uses: jidicula/[email protected]
         with:
-          author_name: clang-format (auto)
-          author_email: [email protected]
-          message: "fix code style using clang-format"
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          clang-format-version: '11'
+          check-path: '.'