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diff --git a/src/io/stream/bufferstream.h b/src/io/stream/bufferstream.h
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+// SPDX-License-Identifier: LGPL-2.1-or-later
+/**
+ * @file
+ * Phoebe DOM Implementation.
+ *
+ * This is a C++ approximation of the W3C DOM model, which follows
+ * fairly closely the specifications in the various .idl files, copies of
+ * which are provided for reference.  Most important is this one:
+ *
+ * http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407/idl-definitions.html
+ *//*
+ * Authors:
+ * see git history
+ *   Bob Jamison
+ *
+ * Copyright (C) 2018 Authors
+ * Released under GNU LGPL v2.1+, read the file 'COPYING' for more information.
+ */
+#ifndef SEEN_BUFFERSTREAM_H
+#define SEEN_BUFFERSTREAM_H
+
+
+#include <vector>
+#include "inkscapestream.h"
+
+
+namespace Inkscape
+{
+namespace IO
+{
+
+//#########################################################################
+//# S T R I N G    I N P U T    S T R E A M
+//#########################################################################
+
+/**
+ * This class is for reading character from a DOMString
+ *
+ */
+class BufferInputStream : public InputStream
+{
+
+public:
+
+    BufferInputStream(const std::vector<unsigned char> &sourceBuffer);
+    ~BufferInputStream() override;
+    int available() override;
+    void close() override;
+    int get() override;
+
+private:
+    const std::vector<unsigned char> &buffer;
+    long position;
+    bool closed;
+
+}; // class BufferInputStream
+
+
+
+
+//#########################################################################
+//# B U F F E R     O U T P U T    S T R E A M
+//#########################################################################
+
+/**
+ * This class is for sending a stream to a character buffer
+ *
+ */
+class BufferOutputStream : public OutputStream
+{
+
+public:
+
+    BufferOutputStream();
+    ~BufferOutputStream() override;
+    void close() override;
+    void flush() override;
+    int put(char ch) override;
+    virtual std::vector<unsigned char> &getBuffer()
+        { return buffer; }
+
+    virtual void clear()
+        { buffer.clear(); }
+
+private:
+    std::vector<unsigned char> buffer;
+    bool closed;
+
+}; // class BufferOutputStream
+
+
+
+}  //namespace IO
+}  //namespace Inkscape
+
+
+
+#endif // SEEN_BUFFERSTREAM_H