1 files changed, 21 insertions, 0 deletions
diff --git a/sys/libutf/len.c b/sys/libutf/len.c
new file mode 100644
index 0000000..8fbd679
--- /dev/null
+++ b/sys/libutf/len.c
@@ -0,0 +1,21 @@
+#include "internal.h"
+
+int
+utf8·len(char *s)
+{
+    int c;
+    long n;
+    rune r;
+
+    n = 0;
+    for(;;){
+        c = *(uchar*)s;
+        if(c < Tx){
+            if(c == 0)
+                return n;
+            s++;
+        }else
+            s += utf8·decode(s, &r);
+        n++;
+    }
+}