102 lines
3.3 KiB
C++
102 lines
3.3 KiB
C++
/****************************************************************************
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** libebml : parse EBML files, see http://embl.sourceforge.net/
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**
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** <file/class description>
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**
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** Copyright (C) 2002-2010 Steve Lhomme. All rights reserved.
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**
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** This file is part of libebml.
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**
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** This library is free software; you can redistribute it and/or
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** modify it under the terms of the GNU Lesser General Public
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** License as published by the Free Software Foundation; either
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** version 2.1 of the License, or (at your option) any later version.
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**
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** This library is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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** Lesser General Public License for more details.
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**
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** You should have received a copy of the GNU Lesser General Public
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** License along with this library; if not, write to the Free Software
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** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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**
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** See http://www.matroska.org/license/lgpl/ for LGPL licensing information.
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**
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** Contact license@matroska.org if any conditions of this licensing are
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** not clear to you.
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**
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**********************************************************************/
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/*!
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\file
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\version \$Id$
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\author Steve Lhomme <robux4 @ users.sf.net>
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\author Julien Coloos <suiryc @ users.sf.net>
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\author Moritz Bunkus <moritz @ bunkus.org>
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*/
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#ifndef LIBEBML_SINTEGER_H
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#define LIBEBML_SINTEGER_H
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#include <cassert>
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#include "EbmlTypes.h"
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#include "EbmlElement.h"
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START_LIBEBML_NAMESPACE
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const int DEFAULT_INT_SIZE = 1; ///< optimal size stored
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/*!
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\class EbmlSInteger
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\brief Handle all operations on a signed integer EBML element
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*/
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class EBML_DLL_API EbmlSInteger : public EbmlElement {
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public:
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EbmlSInteger();
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EbmlSInteger(int64 DefaultValue);
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EbmlSInteger(const EbmlSInteger & ElementToClone);
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EbmlSInteger & operator = (int64 NewValue) {Value = NewValue; SetValueIsSet(); return *this;}
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/*!
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Set the default size of the integer (usually 1,2,4 or 8)
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*/
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virtual void SetDefaultSize(uint64 nDefaultSize = DEFAULT_INT_SIZE) {EbmlElement::SetDefaultSize(nDefaultSize); SetSize_(nDefaultSize);}
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virtual bool ValidateSize() const {return IsFiniteSize() && (GetSize() <= 8);}
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filepos_t RenderData(IOCallback & output, bool bForceRender, bool bWithDefault = false);
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filepos_t ReadData(IOCallback & input, ScopeMode ReadFully = SCOPE_ALL_DATA);
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filepos_t UpdateSize(bool bWithDefault = false, bool bForceRender = false);
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virtual bool IsSmallerThan(const EbmlElement *Cmp) const;
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operator int8() const;
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operator int16() const;
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operator int32() const;
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operator int64() const;
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EbmlSInteger &SetValue(int64 NewValue);
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int64 GetValue() const;
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void SetDefaultValue(int64 aValue) {assert(!DefaultISset()); DefaultValue = aValue; SetDefaultIsSet();}
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int64 DefaultVal() const {assert(DefaultISset()); return DefaultValue;}
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bool IsDefaultValue() const {
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return (DefaultISset() && Value == DefaultValue);
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}
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#if defined(EBML_STRICT_API)
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private:
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#else
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protected:
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#endif
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int64 Value; /// The actual value of the element
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int64 DefaultValue;
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};
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END_LIBEBML_NAMESPACE
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#endif // LIBEBML_SINTEGER_H
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