1 files changed, 7 insertions, 1 deletions
diff --git a/source/core/StarDataStreamDevices.cpp b/source/core/StarDataStreamDevices.cpp
index 58ec920..b769167 100644
--- a/source/core/StarDataStreamDevices.cpp
+++ b/source/core/StarDataStreamDevices.cpp
@@ -130,7 +130,9 @@ void DataStreamBuffer::writeData(char const* data, size_t len) {
   m_buffer->writeFull(data, len);
 }
 
-DataStreamExternalBuffer::DataStreamExternalBuffer() {}
+DataStreamExternalBuffer::DataStreamExternalBuffer() : m_buffer() {}
+
+DataStreamExternalBuffer::DataStreamExternalBuffer(DataStreamBuffer const& buffer) : DataStreamExternalBuffer(buffer.ptr(), buffer.size()) {}
 
 DataStreamExternalBuffer::DataStreamExternalBuffer(char const* externalData, size_t len) : DataStreamExternalBuffer() {
   reset(externalData, len);
@@ -160,6 +162,10 @@ size_t DataStreamExternalBuffer::pos() {
   return m_buffer.pos();
 }
 
+size_t DataStreamExternalBuffer::remaining() {
+  return m_buffer.dataSize() - m_buffer.pos();
+}
+
 void DataStreamExternalBuffer::reset(char const* externalData, size_t len) {
   m_buffer.reset(externalData, len);
 }