src/add-ons/media/plugins/matroska/libebml/ebml/EbmlSInteger.h

   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
  44 START_LIBEBML_NAMESPACE
  45
  46 const 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 */
  52 class 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
  90 END_LIBEBML_NAMESPACE
  91
  92 #endif // LIBEBML_SINTEGER_H