--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/macro.h	Mon Sep 25 21:21:25 2017 +0200
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2017 Guido Berhoerster <guido+pwm@berhoerster.name>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef	MACRO_H
+#define	MACRO_H
+
+#include "tok.h"
+
+enum macro_err {
+	MACRO_ERR_OK,
+	MACRO_ERR_INVALID_NAME = -1,
+	MACRO_ERR_UNDEFINED_MACRO = -2,
+	MACRO_ERR_RECURSIVE = -3
+};
+
+struct macro_head;
+struct macro_entry;
+
+void		macro_init(struct macro_head **);
+void		macro_destroy(struct macro_head *);
+enum macro_err	macro_parse(const char *, size_t, union tok **,
+    struct macro_head *, struct macro_entry **);
+void		macro_add(struct macro_head *, struct macro_entry *);
+int		macro_expand_macros(struct macro_head *, size_t, union tok **,
+    int *, char ***);
+
+#endif /* !MACRO_H */