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diff --git a/libtdenetwork/gpgmepp/data.h b/libtdenetwork/gpgmepp/data.h
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+++ b/libtdenetwork/gpgmepp/data.h
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+/* data.h - wraps a gpgme data object
+   Copyright (C) 2003,2004 Klarälvdalens Datakonsult AB
+
+   This file is part of GPGME++.
+ 
+   GPGME++ 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 2 of the License, or
+   (at your option) any later version.
+ 
+   GPGME++ 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 GPGME++; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#ifndef __GPGMEPP_DATA_H__
+#define __GPGMEPP_DATA_H__
+
+#include <gpgmepp/gpgmefw.h>
+
+#include <sys/types.h> // for size_t, off_t
+#include <cstdio> // FILE
+#include <tdepimmacros.h>
+
+namespace GpgME {
+
+  class DataProvider;
+  class Error;
+
+  class KDE_EXPORT Data {
+  public:
+    Data();
+    Data( gpgme_data_t data );
+    Data( const Data & other );
+
+    // Memory-Based Data Buffers:
+    Data( const char * buffer, size_t size, bool copy=true );
+    Data( const char * filename );
+    Data( const char * filename, off_t offset, size_t length );
+    Data( FILE * fp, off_t offset, size_t length );
+    // File-Based Data Buffers:
+    Data( FILE * fp );
+    Data( int fd );
+    // Callback-Based Data Buffers:
+    Data( DataProvider * provider );
+
+    virtual ~Data();
+
+    static Data null;
+
+    const Data & operator=( const Data & other );
+
+    bool isNull() const;
+
+    ssize_t read( void * buffer, size_t length );
+    ssize_t write( const void * buffer, size_t length );
+    off_t seek( off_t offset, int whence );
+
+    class Private;
+    Private * impl() const { return d; }
+  private:
+    Private * d;
+  };
+
+}
+
+#endif // __GPGMEPP_DATA_H__