Initial revision of libutf library.
Libutf is a port of Plan 9's support library for UTF-8 and Unicode.
Downloaded from http://swtch.com/plan9port/unix/libutf.tgz. No
modifications required to compile.
Change-Id: I5646bc8709bafc14039d30e28a0c69a804e78548
diff --git a/runestrrchr.c b/runestrrchr.c
new file mode 100644
index 0000000..1b0edbb
--- /dev/null
+++ b/runestrrchr.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 "plan9.h"
+#include "utf.h"
+
+Rune*
+runestrrchr(Rune *s, Rune c)
+{
+ Rune *r;
+
+ if(c == 0)
+ return runestrchr(s, 0);
+ r = 0;
+ while(s = runestrchr(s, c))
+ r = s++;
+ return r;
+}