Add scripts for running clang-format

scripts/clang-format

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+find . -type f -a '(' -name '*.c' -o -name '*.h' ')' | xargs clang-format -i

scripts/clang-format-ci

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+errors=0
+paths=$(find . -type f -a '(' -name '*.c' -o -name '*.h' ')')
+for path in $paths; do
+    in=$(cat $path)
+    out=$(clang-format $path)
+
+    if [ "$in" != "$out" ]; then
+        diff -u -L $path -L "$path.formatted" $path - <<<$out
+        errors=1
+    fi
+done
+
+if [ $errors -ne 0 ]; then
+    echo "Formatting errors detected, run ./scripts/clang-format to fix!"
+    exit 1
+fi