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+//
+// VMime library (http://www.vmime.org)
+// Copyright (C) 2002 Vincent Richard <vincent@vmime.org>
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License as
+// published by the Free Software Foundation; either version 3 of
+// the License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this program; if not, write to the Free Software Foundation, Inc.,
+// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+//
+// Linking this library statically or dynamically with other modules is making
+// a combined work based on this library. Thus, the terms and conditions of
+// the GNU General Public License cover the whole combination.
+//
+
+#ifndef VMIME_UTILITY_SEEKABLEINPUTSTREAMREGIONADAPTER_HPP_INCLUDED
+#define VMIME_UTILITY_SEEKABLEINPUTSTREAMREGIONADAPTER_HPP_INCLUDED
+
+
+#include "vmime/utility/seekableInputStream.hpp"
+
+
+namespace vmime {
+namespace utility {
+
+
+/** An adapter for reading a limited region of a seekable input stream.
+ */
+class VMIME_EXPORT seekableInputStreamRegionAdapter : public seekableInputStream {
+
+public:
+
+ /** Creates a new adapter for a seekableInputStream.
+ *
+ * @param stream source stream
+ * @param begin start position in source stream
+ * @param length region length in source stream
+ */
+ seekableInputStreamRegionAdapter(
+ const shared_ptr <seekableInputStream>& stream,
+ const size_t begin,
+ const size_t length
+ );
+
+ bool eof() const;
+ void reset();
+ size_t read(byte_t* const data, const size_t count);
+ size_t skip(const size_t count);
+ size_t getPosition() const;
+ void seek(const size_t pos);
+
+private:
+
+ shared_ptr <seekableInputStream> m_stream;
+ size_t m_begin;
+ size_t m_length;
+ size_t m_position;
+};
+
+
+} // utility
+} // vmime
+
+
+#endif // VMIME_UTILITY_SEEKABLEINPUTSTREAMREGIONADAPTER_HPP_INCLUDED