added posix indent configuration and indent make target

.indent.pro

@@ -0,0 +1,14 @@
+-i8
+-ts8
+-ut
+-brf
+-lp
+-ce
+-npcs
+-ncs
+-l80
+-cd33
+-nip
+-npsl
+-di1
+-ldi1

makefile

@@ -35,3 +35,11 @@ all: ${OBJ}
 .PHONY: clean
 clean:
 	@rm -rfv ${OBJ} topaz
+
+INDENTABLE := $(shell find . -name "*.c" -o -name "*.h")
+INDENTABLE := $(filter-out ./gl/gl.h,$(INDENTABLE))
+INDENTABLE := $(filter-out ./rgfw.h,$(INDENTABLE))
+indent: $(INDENTABLE:%=%.indent)
+
+%.indent: %
+	indent $<