Add astyle code formatter usage script and change .gitignore to exclude astyle preserved files

.gitignore

@@ -1,6 +1,9 @@
 # Build artefacts
 bin/*
 
+# astyle formatter preserved files
+*.orig
+
 #
 # Templates from https://github.com/github/gitignore
 #

tooling/format-code.sh

@@ -0,0 +1,48 @@
+#!/bin/bash
+
+# Simple script for code formatting in 1tbs
+# See http://astyle.sourceforge.net/astyle.html for syntax and defaults
+
+MINPARAMS=1
+ORIG_SUFFIX=orig
+
+if [ $# -lt "$MINPARAMS" ]
+then
+    echo "This script needs C source files passed as arguments"
+    echo "USAGE: format-code.sh src/main.c src/somecode.c ..."
+    exit 1
+fi
+
+# 
+for FILE in "$@"
+do
+    RESULT="$(astyle    --style=1tbs \
+                        --indent-col1-comments \
+                        --break-blocks \
+                        --pad-oper \
+                        --pad-header \
+                        --delete-empty-lines \
+                        --add-brackets \
+                        --convert-tabs \
+                        --max-code-length=80 \
+                        --break-after-logical \
+                        --mode=c \
+                        --suffix=.$ORIG_SUFFIX \
+                        --lineend=linux \
+                        $FILE)"
+
+    # if file unchanged print unchanged result message
+    if [[ "$RESULT" = Unchanged* ]]
+    then
+        echo "$RESULT"
+    fi
+
+    # if file formatted print result and renamed file name
+    if [[ "$RESULT" = Formatted* ]]
+    then
+        echo "$RESULT"
+        echo "Original code was preserved in file $FILE.$ORIG_SUFFIX"
+    fi
+done
+
+exit 0