avoid unnecessary hoisting

diff --git a/index.js b/index.js
index 8d0a531608386082477e716ba6d90a8d30dcc7e3..86c37bbcbd9a399c75374c8e646ca18694c673e1 100644 (file)
--- a/index.js
+++ b/index.js
@@ -634,30 +634,20 @@ function decodeCodePointsArray (array) {
 
 function utf8Slice (buf, start, end) {
   end = Math.min(buf.length, end)
-  var firstByte
-  var secondByte
-  var thirdByte
-  var fourthByte
-  var bytesPerSequence
-  var tempCodePoint
-  var codePoint
   var res = []
 
-  for (var i = start; i < end; i += bytesPerSequence) {
-    firstByte = buf[i]
-    codePoint = 0xFFFD
-
-    if (firstByte > 0xEF) {
-      bytesPerSequence = 4
-    } else if (firstByte > 0xDF) {
-      bytesPerSequence = 3
-    } else if (firstByte > 0xBF) {
-      bytesPerSequence = 2
-    } else {
-      bytesPerSequence = 1
-    }
+  var i = start
+  while (i < end) {
+    var firstByte = buf[i]
+    var codePoint = 0xFFFD
+    var bytesPerSequence = (firstByte > 0xEF) ? 4
+      : (firstByte > 0xDF) ? 3
+      : (firstByte > 0xBF) ? 2
+      : 1
 
     if (i + bytesPerSequence <= end) {
+      var secondByte, thirdByte, fourthByte, tempCodePoint
+
       switch (bytesPerSequence) {
         case 1:
           if (firstByte < 0x80) {
@@ -707,6 +697,7 @@ function utf8Slice (buf, start, end) {
     }
 
     res.push(codePoint)
+    i += bytesPerSequence
   }
 
   return decodeCodePointsArray(res)