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
99
|
// Copyright 2017 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "core/fxcrt/fx_stream.h"
#include <algorithm>
#include <memory>
#include <utility>
#include <vector>
#include "core/fxcrt/fx_safe_types.h"
#include "core/fxcrt/ifxcrt_fileaccess.h"
namespace {
class CFX_CRTFileStream final : public IFX_SeekableStream {
public:
template <typename T, typename... Args>
friend CFX_RetainPtr<T> pdfium::MakeRetain(Args&&... args);
// IFX_SeekableStream:
FX_FILESIZE GetSize() override { return m_pFile->GetSize(); }
bool IsEOF() override { return GetPosition() >= GetSize(); }
FX_FILESIZE GetPosition() override { return m_pFile->GetPosition(); }
bool ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override {
return m_pFile->ReadPos(buffer, size, offset) > 0;
}
size_t ReadBlock(void* buffer, size_t size) override {
return m_pFile->Read(buffer, size);
}
bool WriteBlock(const void* buffer,
FX_FILESIZE offset,
size_t size) override {
return !!m_pFile->WritePos(buffer, size, offset);
}
bool Flush() override { return m_pFile->Flush(); }
private:
explicit CFX_CRTFileStream(std::unique_ptr<IFXCRT_FileAccess> pFA)
: m_pFile(std::move(pFA)) {}
~CFX_CRTFileStream() override {}
std::unique_ptr<IFXCRT_FileAccess> m_pFile;
};
} // namespace
// static
CFX_RetainPtr<IFX_SeekableStream> IFX_SeekableStream::CreateFromFilename(
const char* filename,
uint32_t dwModes) {
std::unique_ptr<IFXCRT_FileAccess> pFA = IFXCRT_FileAccess::Create();
if (!pFA->Open(filename, dwModes))
return nullptr;
return pdfium::MakeRetain<CFX_CRTFileStream>(std::move(pFA));
}
// static
CFX_RetainPtr<IFX_SeekableStream> IFX_SeekableStream::CreateFromFilename(
const wchar_t* filename,
uint32_t dwModes) {
std::unique_ptr<IFXCRT_FileAccess> pFA = IFXCRT_FileAccess::Create();
if (!pFA->Open(filename, dwModes))
return nullptr;
return pdfium::MakeRetain<CFX_CRTFileStream>(std::move(pFA));
}
// static
CFX_RetainPtr<IFX_SeekableReadStream>
IFX_SeekableReadStream::CreateFromFilename(const char* filename) {
return IFX_SeekableStream::CreateFromFilename(filename, FX_FILEMODE_ReadOnly);
}
bool IFX_SeekableWriteStream::WriteBlock(const void* pData, size_t size) {
return WriteBlock(pData, GetSize(), size);
}
bool IFX_SeekableReadStream::IsEOF() {
return false;
}
FX_FILESIZE IFX_SeekableReadStream::GetPosition() {
return 0;
}
size_t IFX_SeekableReadStream::ReadBlock(void* buffer, size_t size) {
return 0;
}
bool IFX_SeekableStream::WriteBlock(const void* buffer, size_t size) {
return WriteBlock(buffer, GetSize(), size);
}
bool IFX_SeekableStream::WriteString(const CFX_ByteStringC& str) {
return WriteBlock(str.c_str(), str.GetLength());
}
|
