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/*=========================================================================
Program: Visualization Toolkit
Module: vtkXMLDataHeaderPrivate.h
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#ifndef vtkXMLDataHeaderPrivate_DoNotInclude
# error "do not include unless you know what you are doing"
#endif
#ifndef vtkXMLDataHeaderPrivate_h
#define vtkXMLDataHeaderPrivate_h
#include "vtkType.h"
#include <vector>
// Abstract interface using type vtkTypeUInt64 to access an array
// of either vtkTypeUInt32 or vtkTypeUInt64. Shared by vtkXMLWriter
// and vtkXMLDataParser to write/read binary data headers.
class vtkXMLDataHeader
{
public:
virtual void Resize(size_t count) = 0;
virtual vtkTypeUInt64 Get(size_t index) const = 0;
virtual bool Set(size_t index, vtkTypeUInt64 value) = 0;
virtual size_t WordSize() const = 0;
virtual size_t WordCount() const = 0;
virtual unsigned char* Data() = 0;
size_t DataSize() const { return this->WordCount()*this->WordSize(); }
virtual ~vtkXMLDataHeader() {}
static inline vtkXMLDataHeader* New(int width, size_t count);
};
template <typename T>
class vtkXMLDataHeaderImpl: public vtkXMLDataHeader
{
std::vector<T> Header;
public:
vtkXMLDataHeaderImpl(size_t n): Header(n, 0) {}
virtual void Resize(size_t count)
{ this->Header.resize(count, 0); }
virtual vtkTypeUInt64 Get(size_t index) const
{ return this->Header[index]; }
virtual bool Set(size_t index, vtkTypeUInt64 value)
{
this->Header[index] = T(value);
return vtkTypeUInt64(this->Header[index]) == value;
}
virtual size_t WordSize() const { return sizeof(T); }
virtual size_t WordCount() const { return this->Header.size(); }
virtual unsigned char* Data()
{ return reinterpret_cast<unsigned char*>(&this->Header[0]); }
};
vtkXMLDataHeader* vtkXMLDataHeader::New(int width, size_t count)
{
switch(width)
{
case 32: return new vtkXMLDataHeaderImpl<vtkTypeUInt32>(count);
case 64: return new vtkXMLDataHeaderImpl<vtkTypeUInt64>(count);
}
return 0;
}
#endif
// VTK-HeaderTest-Exclude: vtkXMLDataHeaderPrivate.h
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