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: EbmlFloat.h 1079 2005-03-03 13:18:14Z robux4 $
34	\author Steve Lhomme     <robux4 @ users.sf.net>
35*/
36#ifndef LIBEBML_FLOAT_H
37#define LIBEBML_FLOAT_H
38
39#include "EbmlTypes.h"
40#include "EbmlElement.h"
41
42START_LIBEBML_NAMESPACE
43
44/*!
45    \class EbmlFloat
46    \brief Handle all operations on a float EBML element
47*/
48class EBML_DLL_API EbmlFloat : public EbmlElement {
49	public:
50		enum Precision {
51			 FLOAT_32
52			,FLOAT_64
53		};
54
55		EbmlFloat(const Precision prec = FLOAT_32);
56		EbmlFloat(const double DefaultValue, const Precision prec = FLOAT_32);
57		EbmlFloat(const EbmlFloat & ElementToClone);
58
59		bool ValidateSize() const
60		{
61			return (Size == 4 || Size == 8);
62		}
63
64		uint32 RenderData(IOCallback & output, bool bForceRender, bool bKeepIntact = false);
65		uint64 ReadData(IOCallback & input, ScopeMode ReadFully = SCOPE_ALL_DATA);
66		uint64 UpdateSize(bool bKeepIntact = false, bool bForceRender = false);
67
68		void SetPrecision(const EbmlFloat::Precision prec = FLOAT_32)
69		{
70			if (prec == FLOAT_64)
71				Size = 8;
72			else
73				Size = 4; // default size
74		}
75
76
77//		EbmlFloat & operator=(const float NewValue) { Value = NewValue; return *this;}
78		EbmlFloat & operator=(const double NewValue) { Value = NewValue; bValueIsSet = true; return *this;}
79
80		bool operator<(const EbmlFloat & EltCmp) const {return Value < EltCmp.Value;}
81
82		operator const float() const {return float(Value);}
83		operator const double() const {return double(Value);}
84
85		void SetDefaultValue(double aValue) {assert(!DefaultIsSet); DefaultValue = aValue; DefaultIsSet = true;}
86
87		const double DefaultVal() const {assert(DefaultIsSet); return DefaultValue;}
88
89		bool IsDefaultValue() const {
90			return (DefaultISset() && Value == DefaultValue);
91		}
92
93	protected:
94		double Value; /// The actual value of the element
95		double DefaultValue;
96};
97
98END_LIBEBML_NAMESPACE
99
100#endif // LIBEBML_FLOAT_H
101