1/**************************************************************************** 2** libebml : parse EBML files, see http://embl.sourceforge.net/ 3** 4** <file/class description> 5** 6** Copyright (C) 2002-2005 Steve Lhomme. All rights reserved. 7** 8** This file is part of libebml. 9** 10** This library is free software; you can redistribute it and/or 11** modify it under the terms of the GNU Lesser General Public 12** License as published by the Free Software Foundation; either 13** version 2.1 of the License, or (at your option) any later version. 14** 15** This library is distributed in the hope that it will be useful, 16** but WITHOUT ANY WARRANTY; without even the implied warranty of 17** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18** Lesser General Public License for more details. 19** 20** You should have received a copy of the GNU Lesser General Public 21** License along with this library; if not, write to the Free Software 22** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23** 24** See http://www.matroska.org/license/lgpl/ for LGPL licensing information. 25** 26** Contact license@matroska.org if any conditions of this licensing are 27** not clear to you. 28** 29**********************************************************************/ 30 31/*! 32 \file 33 \version \$Id: EbmlSInteger.h 1079 2005-03-03 13:18:14Z robux4 $ 34 \author Steve Lhomme <robux4 @ users.sf.net> 35 \author Julien Coloos <suiryc @ users.sf.net> 36 \author Moritz Bunkus <moritz @ bunkus.org> 37*/ 38#ifndef LIBEBML_SINTEGER_H 39#define LIBEBML_SINTEGER_H 40 41#include "EbmlTypes.h" 42#include "EbmlElement.h" 43 44START_LIBEBML_NAMESPACE 45 46const int DEFAULT_INT_SIZE = 1; ///< optimal size stored 47 48/*! 49 \class EbmlSInteger 50 \brief Handle all operations on a signed integer EBML element 51*/ 52class EBML_DLL_API EbmlSInteger : public EbmlElement { 53 public: 54 EbmlSInteger(); 55 EbmlSInteger(const int64 DefaultValue); 56 EbmlSInteger(const EbmlSInteger & ElementToClone); 57 58 EbmlSInteger & operator=(const int64 NewValue) {Value = NewValue; bValueIsSet = true; return *this;} 59 60 /*! 61 Set the default size of the integer (usually 1,2,4 or 8) 62 */ 63 void SetDefaultSize(const int nDefaultSize = DEFAULT_INT_SIZE) {Size = nDefaultSize;} 64 65 bool ValidateSize() const {return (Size <= 8);} 66 uint32 RenderData(IOCallback & output, bool bForceRender, bool bKeepIntact = false); 67 uint64 ReadData(IOCallback & input, ScopeMode ReadFully = SCOPE_ALL_DATA); 68 uint64 UpdateSize(bool bKeepIntact = false, bool bForceRender = false); 69 70 bool operator<(const EbmlSInteger & EltCmp) const {return Value < EltCmp.Value;} 71 72 operator int8() {return int8(Value);} 73 operator int16() {return int16(Value);} 74 operator int32() {return int32(Value);} 75 operator int64() {return Value;} 76 77 void SetDefaultValue(int64 aValue) {assert(!DefaultIsSet); DefaultValue = aValue; DefaultIsSet = true;} 78 79 const int64 DefaultVal() const {assert(DefaultIsSet); return DefaultValue;} 80 81 bool IsDefaultValue() const { 82 return (DefaultISset() && Value == DefaultValue); 83 } 84 85 protected: 86 int64 Value; /// The actual value of the element 87 int64 DefaultValue; 88}; 89 90END_LIBEBML_NAMESPACE 91 92#endif // LIBEBML_SINTEGER_H 93