1 files changed, 17 insertions, 0 deletions
diff --git a/common.h b/common.h
index 9b30011..7e42a49 100644
--- a/common.h
+++ b/common.h
@@ -11,3 +11,20 @@
 void writeall(const char *s, size_t n);
 void writechar(uint_least32_t cp);
 int convert(enum libcharconv_result (*conv)(const char *, size_t, size_t *, uint_least32_t *, size_t *));
+
+
+#define SIMPLE(FUNCTION)\
+	USAGE("");\
+	\
+	int\
+	main(int argc, char *argv[])\
+	{\
+		ARGBEGIN {\
+		default:\
+			usage();\
+		} ARGEND;\
+		if (argc)\
+			usage();\
+		\
+		return convert(&FUNCTION);\
+	}