Refactor

src/commonMain/kotlin/com/infendro/hash/blake2/Blake2s.kt

@@ -38,15 +38,21 @@ class Blake2s(bytes: Int) : HashFunction(bytes, 64) {
             process()
             buffer.reset()
         }
+
         var i = 0
-        while (i + buffer.free < bytes.size) {
-            val remaining = buffer.free
-            buffer.append(bytes, startIndex = i, endIndex = i + remaining)
+
+        var free = buffer.free
+        while (i + free < bytes.size) {
+            buffer.append(bytes, startIndex = i, endIndex = i + free)
+            length += free
             process()
             buffer.reset()
-            i += remaining
+            free = buffer.free
+            i += block
         }
+
         buffer.append(bytes, startIndex = i)
+        length += (bytes.size - i)
     }
 
     override fun process() = compress(buffer.value, length, false)