1 files changed, 23 insertions, 0 deletions
diff --git a/src/corelib/tools/qcryptographichash.cpp b/src/corelib/tools/qcryptographichash.cpp
index 89b3bab7c6..e5ac73c3f5 100644
--- a/src/corelib/tools/qcryptographichash.cpp
+++ b/src/corelib/tools/qcryptographichash.cpp
@@ -50,6 +50,7 @@
 #include "../../3rdparty/md4/md4.h"
 #include "../../3rdparty/md4/md4.cpp"
 #include "../../3rdparty/sha1/sha1.cpp"
+#include <qiodevice.h>
 
 
 QT_BEGIN_NAMESPACE
@@ -155,6 +156,28 @@ void QCryptographicHash::addData(const QByteArray &data)
 }
 
 /*!
+  Reads the data from the open QIODevice \a device until it ends
+  and hashes it. Returns true if reading was successful.
+ */
+bool QCryptographicHash::addData(QIODevice* device)
+{
+    if (!device->isReadable())
+        return false;
+
+    if (!device->isOpen())
+        return false;
+
+    char buffer[1024];
+    int length;
+
+    while ((length = device->read(buffer,sizeof(buffer))) > 0)
+        addData(buffer,length);
+
+    return device->atEnd();
+}
+
+
+/*!
   Returns the final hash value.
 
   \sa QByteArray::toHex()