From f77cbdabec0d6312323c5635d704b06a473c9222 Mon Sep 17 00:00:00 2001
From: "Michael D. Lowis" <mike@mdlowis.com>
Date: Sun, 28 Jun 2015 17:29:34 -0400
Subject: [PATCH] Added ctype include

---
 source/libc.h     |  1 +
 source/utf/rune.c | 27 ++++++++++++++++++++-------
 2 files changed, 21 insertions(+), 7 deletions(-)

diff --git a/source/libc.h b/source/libc.h
index ab87ee8..f79f938 100644
--- a/source/libc.h
+++ b/source/libc.h
@@ -14,6 +14,7 @@
 #include <stdint.h>
 #include <stdarg.h>
 #include <errno.h>
+#include <ctype.h>
 
 #ifndef nil
 #define nil NULL
diff --git a/source/utf/rune.c b/source/utf/rune.c
index 45d9754..5c9df42 100644
--- a/source/utf/rune.c
+++ b/source/utf/rune.c
@@ -16,21 +16,34 @@ int chartorune(Rune* r, char* s)
 
 int runelen(long r)
 {
-    (void)r;
-    return 0;
+    if(r <= 0x7F)
+        return 1;
+    else if(r <= 0x07FF)
+        return 2;
+    else if(r <= 0xD7FF)
+        return 3;
+    else if(r <= 0xDFFF)
+        return 0; /* surrogate character */
+    else if(r <= 0xFFFD)
+        return 3;
+    else if(r <= 0xFFFF)
+        return 0; /* illegal character */
+    else if(r <= Runemax)
+        return 4;
+    else
+        return 0; /* rune too large */
 }
 
 int runenlen(Rune* r, int num)
 {
-    (void)r;
-    (void)num;
-    return 0;
+    size_t i, n = 0;
+    for(i = 0; i < num; i++)
+        n += runelen(r[i]);
+    return n;
 }
 
 bool fullrune(char* s, int n)
 {
-    (void)s;
-    (void)n;
     return false;
 }
 
-- 
2.54.0