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diff --git a/lib/pdf/primitive.hh b/lib/pdf/primitive.hh
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+//  primitive.hh -- PDF primitives
+//  Copyright (C) 2008  SEIKO EPSON CORPORATION
+//
+//  This file is part of the 'iscan' program.
+//
+//  The 'iscan' program is free-ish 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.
+//
+//  This program is distributed in the hope that it will be useful, but
+//  WITHOUT ANY WARRANTY;  without even the implied warranty of FITNESS
+//  FOR A PARTICULAR PURPOSE or MERCHANTABILITY.
+//  See the GNU General Public License for more details.
+//
+//  You should have received a verbatim copy of the GNU General Public
+//  License along with this program; if not, write to:
+//
+//      Free Software Foundation, Inc.
+//      59 Temple Place, Suite 330
+//      Boston, MA  02111-1307  USA
+//
+//  As a special exception, the copyright holders give permission
+//  to link the code of this program with the esmod library and
+//  distribute linked combinations including the two.  You must obey
+//  the GNU General Public License in all respects for all of the
+//  code used other than esmod.
+
+#ifndef iscan_pdf_primitive_hh_included
+#define iscan_pdf_primitive_hh_included
+
+#ifndef __cplusplus
+#error "This is a C++ header file; use a C++ compiler to compile it."
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "object.hh"
+
+#include <string>
+
+namespace iscan
+{
+
+namespace pdf
+{
+  using std::string;
+
+/*! Defines a primitive pdf object: one of string, name, integer, or real.
+ */
+class primitive : public object
+{
+private:
+  string _str;
+
+public:
+  primitive ();
+
+  /*! Create a new pdf string/name object with the given value.
+   */
+  primitive (string value);
+
+  /*! Create a new pdf integer object
+   */
+  primitive (int value);
+
+  primitive (size_t value);
+
+  /*! Create a new pdf real object
+   */
+  primitive (double value);
+
+  virtual ~primitive (void);
+
+  /*! Compare the contents of two pdf::primitives.
+   *
+   * Only the object contents are compared, the object number of the
+   * two objects may differ.
+   */
+  virtual bool operator== (const primitive& other) const;
+
+  void operator= (const primitive& that);
+
+  virtual void print (FILE* fp) const;
+};
+
+}       // namespace pdf
+}       // namespace iscan
+
+#endif  // iscan_pdf_primitive_hh_included