begin work on new lexer

subprojects/libutf/runestrdup.c

@@ -0,0 +1,30 @@
+/*
+ * The authors of this software are Rob Pike and Ken Thompson.
+ *              Copyright (c) 2002 by Lucent Technologies.
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose without fee is hereby granted, provided that this entire notice
+ * is included in all copies of any software which is or includes a copy
+ * or modification of this software and in all copies of the supporting
+ * documentation for such software.
+ * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTY.  IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE
+ * ANY REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
+ * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
+ */
+#include <stdarg.h>
+#include <string.h>
+#include <stdlib.h>
+#include "plan9.h"
+#include "utf.h"
+
+Rune*
+runestrdup(Rune *s)
+{
+	Rune *ns;
+
+	ns = malloc(sizeof(Rune)*(runestrlen(s) + 1));
+	if(ns == 0)
+		return 0;
+
+	return runestrcpy(ns, s);
+}