diff --git a/qse/include/qse/sed/Sed.hpp b/qse/include/qse/sed/Sed.hpp
index 34098537..0d176cd4 100644
--- a/qse/include/qse/sed/Sed.hpp
+++ b/qse/include/qse/sed/Sed.hpp
@@ -1,5 +1,5 @@
 /*
- * $Id: Sed.hpp 558 2011-09-02 15:27:44Z hyunghwan.chung $
+ * $Id: Sed.hpp 571 2011-09-20 14:04:48Z hyunghwan.chung $
  *
     Copyright 2006-2011 Chung, Hyung-Hwan.
     This file is part of QSE.
@@ -202,6 +202,20 @@ public:
 	///
 	int execute (Stream& iostream);
 
+
+	///
+	/// The stop() function makes a request to break a running loop
+	/// inside execute(). Note that this does not affect blocking 
+	/// operations in user-defined stream handlers.
+	///
+	void stop ();
+
+	///
+	/// The isStop() function returns true if stop() has been called
+	/// since the last call to execute(), false otherwise.
+	///
+	bool isStop () const;
+
 	///
 	/// The getOption() function gets the current options.
 	/// @return 0 or current options ORed of #option_t enumerators.
diff --git a/qse/lib/sed/Sed.cpp b/qse/lib/sed/Sed.cpp
index d6270bef..6ce89cd6 100644
--- a/qse/lib/sed/Sed.cpp
+++ b/qse/lib/sed/Sed.cpp
@@ -1,5 +1,5 @@
 /*
- * $Id: Sed.cpp 558 2011-09-02 15:27:44Z hyunghwan.chung $
+ * $Id: Sed.cpp 571 2011-09-20 14:04:48Z hyunghwan.chung $
  *
     Copyright 2006-2011 Chung, Hyung-Hwan.
     This file is part of QSE.
@@ -68,6 +68,18 @@ int Sed::execute (Stream& iostream)
 	return qse_sed_exec (sed, xin, xout);
 }
 
+void Sed::stop ()
+{
+	QSE_ASSERT (sed != QSE_NULL);
+	return qse_sed_stop (sed);
+}
+
+bool Sed::isStop () const
+{
+	QSE_ASSERT (sed != QSE_NULL);
+	return qse_sed_isstop (sed);
+}
+
 int Sed::getOption() const
 {
 	QSE_ASSERT (sed != QSE_NULL);