1 files changed, 5 insertions, 1 deletions
diff --git a/helper.cpp b/helper.cpp
index 270feb1..174f585 100644
--- a/helper.cpp
+++ b/helper.cpp
@@ -82,7 +82,11 @@ namespace Helper {
 			int readBytes = 0;
 			do {
 				read = file.read(data.data(), 512);
-				readBytes += read;
+                if(read > 0){
+                    readBytes += read;
+                }else{
+                    return QString();
+                }
 				h.addData(data.data(), read);
 			} while(readBytes < numBytes);
 			QByteArray res = h.result();