--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Implab/Formats/StringScanner.cs	Tue Mar 22 18:58:40 2016 +0300
@@ -0,0 +1,26 @@
+using System;
+
+namespace Implab.Formats {
+    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();
+        }
+
+        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;
+        }
+    }
+}
+