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diff --git a/task1/utils.h b/task1/utils.h
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+/**
+ * $Id: utils.h 2 2009-10-31 02:48:23Z l0728348 $
+ *
+ * Copyright 2009
+ *
+ * @author Manuel Mausz (0728348)
+ * @brief  implements some common utility functions, methods and templates
+ *         available in namespace Utils.
+ */
+
+#ifndef UTILS_H
+#define UTILS_H
+
+#include <sstream>
+#include <stdexcept>
+
+namespace Utils
+{
+  /**
+   * @brief  exception thrown by lexical_cast
+   */
+  class bad_lexical_cast : public std::runtime_error {
+    public:
+      /**
+       * @brief   Default exception ctor
+       * @param   what message to pass along
+       */
+      bad_lexical_cast(const std::string& what)
+        : std::runtime_error(what)
+      {}
+  };
+
+  /**
+   * @brief  simple implementation of boost::lexical_cast
+   *         can be used to convert string to number
+   *         mainly uses operator<< of stringstream
+   * @param  source source value
+   * @return target target value
+   **/
+  template <typename Target, typename Source>
+  Target lexical_cast(const Source& source)
+  {
+      Target target;
+      std::stringstream interpreter;
+      if(!(interpreter << source && interpreter >> target && interpreter.get() == std::char_traits<char>::eof()))
+        throw bad_lexical_cast("bad lexical cast");
+      return target;
+  };
+};
+
+#endif
+
+/* vim: set et sw=2 ts=2: */