1 files changed, 3 insertions, 0 deletions
diff --git a/source/core/StarDataStreamDevices.hpp b/source/core/StarDataStreamDevices.hpp
index dce7dcf..5d404ab 100644
--- a/source/core/StarDataStreamDevices.hpp
+++ b/source/core/StarDataStreamDevices.hpp
@@ -126,6 +126,8 @@ private:
 class DataStreamExternalBuffer : public DataStream {
 public:
   DataStreamExternalBuffer();
+  DataStreamExternalBuffer(DataStreamBuffer const& buffer);
+  DataStreamExternalBuffer(DataStreamExternalBuffer const& buffer) = default;
   DataStreamExternalBuffer(char const* externalData, size_t len);
 
   char const* ptr() const;
@@ -136,6 +138,7 @@ public:
   void seek(size_t pos, IOSeek mode = IOSeek::Absolute);
   bool atEnd();
   size_t pos();
+  size_t remaining();
 
   void reset(char const* externalData, size_t len);