Feat(libunicode): Added an explicit unicode library

Refactored code to pull out utf8 functions from base into a standalone
library. Also left the required function inside arg.c so that code that
calls ARG_BEGIN doesn't have to link to libunicode.

1 files changed, 8 insertions, 0 deletions

diff --git a/sys/libunicode/runelen.c b/sys/libunicode/runelen.c
new file mode 100644
index 0000000..682400c
--- /dev/null
+++ b/sys/libunicode/runelen.c
@@ -0,0 +1,8 @@
+#include "internal.h"
+
+int
+utf8·runelen(rune r)
+{
+    byte s[10];
+    return utf8·runetobyte(s, &r);
+}