1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkFileResourceStream.h"
#include "vtkObjectFactory.h"
#include <vtksys/FStream.hxx>
VTK_ABI_NAMESPACE_BEGIN
vtkStandardNewMacro(vtkFileResourceStream);
//------------------------------------------------------------------------------
struct vtkFileResourceStream::vtkInternals
{
vtksys::ifstream File;
};
//------------------------------------------------------------------------------
vtkFileResourceStream::vtkFileResourceStream()
: vtkResourceStream{ true }
, Impl{ new vtkFileResourceStream::vtkInternals }
{
}
//------------------------------------------------------------------------------
vtkFileResourceStream::~vtkFileResourceStream() = default;
//------------------------------------------------------------------------------
bool vtkFileResourceStream::Open(VTK_FILEPATH const char* path)
{
if (this->Impl->File.is_open())
{
this->Impl->File.close();
}
if (path)
{
this->Impl->File.open(path, std::ios_base::binary);
}
this->Modified();
return this->Impl->File.is_open();
}
//------------------------------------------------------------------------------
std::size_t vtkFileResourceStream::Read(void* buffer, std::size_t bytes)
{
if (bytes == 0)
{
return 0;
}
this->Impl->File.read(static_cast<char*>(buffer), bytes);
return static_cast<std::size_t>(this->Impl->File.gcount());
}
//------------------------------------------------------------------------------
bool vtkFileResourceStream::EndOfStream()
{
return !(this->Impl->File && this->Impl->File.is_open());
}
//------------------------------------------------------------------------------
vtkTypeInt64 vtkFileResourceStream::Seek(vtkTypeInt64 pos, SeekDirection dir)
{
// We want EndOfFile to be false after a Seek call, so we have to clear the stream
// seekg will clear eofbit, but we need to clear failbit. badbit should be kept.
this->Impl->File.clear(this->Impl->File.rdstate() & ~(std::ios_base::failbit));
switch (dir)
{
case SeekDirection::Begin:
return static_cast<vtkTypeInt64>(this->Impl->File.seekg(pos, std::ios_base::beg).tellg());
case SeekDirection::Current:
return static_cast<vtkTypeInt64>(this->Impl->File.seekg(pos, std::ios_base::cur).tellg());
case SeekDirection::End:
return static_cast<vtkTypeInt64>(this->Impl->File.seekg(pos, std::ios_base::end).tellg());
}
return -1;
}
//------------------------------------------------------------------------------
vtkTypeInt64 vtkFileResourceStream::Tell()
{
return static_cast<vtkTypeInt64>(this->Impl->File.tellg());
}
//------------------------------------------------------------------------------
void vtkFileResourceStream::PrintSelf(ostream& os, vtkIndent indent)
{
Superclass::PrintSelf(os, indent);
os << indent << "Open: " << (this->Impl->File.is_open() ? "yes" : "no") << "\n";
}
VTK_ABI_NAMESPACE_END
|
