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diff --git a/relcatalogif/uintegraltype.hh b/relcatalogif/uintegraltype.hh
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+/*
+* This file is part of rasdaman community.
+*
+* Rasdaman community 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.
+*
+* Rasdaman community 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 rasdaman community.  If not, see <http://www.gnu.org/licenses/>.
+*
+* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann /
+rasdaman GmbH.
+*
+* For more information please see <http://www.rasdaman.org>
+* or contact Peter Baumann via <baumann@rasdaman.com>.
+*/
+/*************************************************************
+ *
+ *
+ * PURPOSE:
+ *   The UIntegralType class is the superclass for all unsigned 
+ *   integral types (Char, Short, Long) describing the type of a 
+ *   cell
+ *
+ *
+ * COMMENTS:
+ *
+ ************************************************************/
+
+#ifndef _UINTEGRALTYPE_HH_
+#define _UINTEGRALTYPE_HH_
+
+#include "atomictype.hh"
+
+//@ManMemo: Module: {\bf relcatalogif}.
+
+/*@Doc: 
+UIntegralType is the abstract base class for all integral
+\Ref{BaseType} subclasses, i.e. base types like \Ref{ULongType} or
+\Ref{BoolType}. It provides conversions to/from long and 
+double. It's subclasses must implement conversions to/from unsigned 
+long.
+*/
+
+class UIntegralType : public AtomicType {
+public:
+	UIntegralType(unsigned int newSize):
+		AtomicType(newSize) {}
+	/*@Doc:
+	constructor.
+	*/
+
+	UIntegralType(const UIntegralType& old):
+		AtomicType(old) {}
+	/*@Doc:
+	copy constructor.
+	*/
+
+	UIntegralType(const OId& id) throw (r_Error):
+		AtomicType(id) {}
+	/*@Doc:
+	*/
+
+	virtual ~UIntegralType() {}
+	/*@Doc:
+	*/
+
+	virtual r_Long* convertToCLong(const char*, r_Long*) const;
+	virtual char* makeFromCLong(char*, const r_Long*) const;
+
+	virtual double* convertToCDouble(const char*, double*) const; 
+	virtual char* makeFromCDouble(char*, const double*) const;
+
+protected:
+	UIntegralType(const char* name, unsigned int newSize):
+		AtomicType(name, newSize) {}
+	/*@Doc:
+	*/
+
+};
+
+#include "uintegraltype.icc"
+
+#endif