Add a target to format code

Author: chriso

.clang-format

@@ -0,0 +1,7 @@
+BasedOnStyle: Google
+IndentWidth: 4
+BreakBeforeBraces: Linux
+AllowShortBlocksOnASingleLine: false
+AllowShortFunctionsOnASingleLine: false
+AllowShortIfStatementsOnASingleLine: false
+AllowShortLoopsOnASingleLine: false

Makefile

@@ -25,4 +25,7 @@ check: $(TESTS)
 clean:
 	rm -f $(LIB) $(OBJ) $(TESTS) $(TEST_OBJ)
 
-.PHONY: check clean
+format:
+	clang-format -i */*.{c,h}
+
+.PHONY: check clean format