VTK
vtkXMLDataHeaderPrivate.h
Go to the documentation of this file.
1 /*=========================================================================
2 
3  Program: Visualization Toolkit
4  Module: vtkXMLDataHeaderPrivate.h
5 
6  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
7  All rights reserved.
8  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
9 
10  This software is distributed WITHOUT ANY WARRANTY; without even
11  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
12  PURPOSE. See the above copyright notice for more information.
13 
14 =========================================================================*/
15 
16 #ifndef vtkXMLDataHeaderPrivate_DoNotInclude
17 # error "do not include unless you know what you are doing"
18 #endif
19 
20 #ifndef vtkXMLDataHeaderPrivate_h
21 #define vtkXMLDataHeaderPrivate_h
22 
23 #include "vtkType.h"
24 #include <vector>
25 
26 // Abstract interface using type vtkTypeUInt64 to access an array
27 // of either vtkTypeUInt32 or vtkTypeUInt64. Shared by vtkXMLWriter
28 // and vtkXMLDataParser to write/read binary data headers.
30 {
31 public:
32  virtual void Resize(size_t count) = 0;
33  virtual vtkTypeUInt64 Get(size_t index) const = 0;
34  virtual bool Set(size_t index, vtkTypeUInt64 value) = 0;
35  virtual size_t WordSize() const = 0;
36  virtual size_t WordCount() const = 0;
37  virtual unsigned char* Data() = 0;
38  size_t DataSize() const { return this->WordCount()*this->WordSize(); }
39  virtual ~vtkXMLDataHeader() {}
40  static inline vtkXMLDataHeader* New(int width, size_t count);
41 };
42 
43 template <typename T>
45 {
46  std::vector<T> Header;
47 public:
48  vtkXMLDataHeaderImpl(size_t n): Header(n, 0) {}
49  void Resize(size_t count) override
50  { this->Header.resize(count, 0); }
51  vtkTypeUInt64 Get(size_t index) const override
52  { return this->Header[index]; }
53  bool Set(size_t index, vtkTypeUInt64 value) override
54  {
55  this->Header[index] = T(value);
56  return vtkTypeUInt64(this->Header[index]) == value;
57  }
58  size_t WordSize() const override { return sizeof(T); }
59  size_t WordCount() const override { return this->Header.size(); }
60  unsigned char* Data() override
61  { return reinterpret_cast<unsigned char*>(&this->Header[0]); }
62 };
63 
64 vtkXMLDataHeader* vtkXMLDataHeader::New(int width, size_t count)
65 {
66  switch(width)
67  {
68  case 32: return new vtkXMLDataHeaderImpl<vtkTypeUInt32>(count);
69  case 64: return new vtkXMLDataHeaderImpl<vtkTypeUInt64>(count);
70  }
71  return nullptr;
72 }
73 
74 #endif
75 // VTK-HeaderTest-Exclude: vtkXMLDataHeaderPrivate.h
size_t WordSize() const override
static vtkXMLDataHeader * New(int width, size_t count)
unsigned char * Data() override
virtual bool Set(size_t index, vtkTypeUInt64 value)=0
virtual void Resize(size_t count)=0
vtkTypeUInt64 Get(size_t index) const override
size_t DataSize() const
size_t WordCount() const override
virtual unsigned char * Data()=0
void Resize(size_t count) override
virtual vtkTypeUInt64 Get(size_t index) const =0
bool Set(size_t index, vtkTypeUInt64 value) override
virtual size_t WordSize() const =0
virtual size_t WordCount() const =0