Format C code with Artistic Style

.github/workflows/ci.yml

@@ -555,8 +555,8 @@ jobs:
         run: |
           ruby -e "require 'tiny_tds'; puts TinyTds::Gem.root_path"
 
-  standardrb:
-    name: standardrb
+  formatting:
+    name: Code formatting
     runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
@@ -569,3 +569,12 @@ jobs:
       - name: Check standardrb
         shell: bash
         run: bundle exec standardrb
+
+      - name: Check artistic style
+        uses: per1234/artistic-style-action@v1
+        with:
+          options-file-path: "astyle.conf"
+          target-paths: "./ext/"
+          name-patterns: |
+            - '*.c'
+            - '*.h'

README.md

@@ -441,7 +441,7 @@ $ rake TINYTDS_UNIT_HOST=mydb.host.net TINYTDS_SCHEMA=sqlserver_azure
 
 ### Code formatting
 
-We are using `standardrb` to format our code. Just run `bundle exec standardrb --fix` to format all Ruby files.
+We are using `standardrb` to format the Ruby code and Artistic Style for the C code. Run `bundle exec rake format` to format both types in one operation. Artistic Style needs to be manually installed through your package manager (e.g. `apt install -y astyle`).
 
 ### Compiling Gems for Windows and Linux
 

Rakefile

@@ -65,3 +65,8 @@ end
 
 task build: [:clean, :compile]
 task default: [:build, :test]
+
+task :format do
+  system("bundle exec standardrb --fix")
+  system('astyle --options=astyle.conf "./ext/*.c" "./ext/*.h"')
+end

astyle.conf

@@ -0,0 +1,8 @@
+--style=1tbs
+--break-blocks
+--indent-preproc-block
+--indent-preproc-cond
+--indent=spaces=2
+--indent-switches
+--recursive
+--suffix=none