--- a/Implab/Formats/StringScanner.cs	Thu Mar 24 03:54:46 2016 +0300
+++ b/Implab/Formats/StringScanner.cs	Thu Mar 24 18:52:10 2016 +0300
@@ -4,22 +4,14 @@
     public class StringScanner: TextScanner {
         const int CHUNK_SIZE = 1024;
 
-        readonly string m_text;
-        int m_pos;
-
-        public StringScanner(string text) : base(text.Length, text.Length < CHUNK_SIZE ? text.Length : CHUNK_SIZE) {
-            m_text = text;
-            Feed();
+        public StringScanner(string text) : base(null) {
+            Safe.ArgumentNotNull(text, "text");
+            var data = text.ToCharArray();
+            Feed(data, 0, data.Length);
         }
 
         protected override int Read(char[] buffer, int offset, int size) {
-            var actual = size + m_pos > m_text.Length ? m_text.Length - m_pos : size;
-
-            m_text.CopyTo(m_pos,buffer,offset, actual);
-
-            m_pos += actual;
-
-            return actual;
+            return 0;
         }
     }
 }