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
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
// Copyright 2014 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/cfx_fileaccess_posix.h"
#include <memory>
#include "third_party/base/ptr_util.h"
#ifndef O_BINARY
#define O_BINARY 0
#endif // O_BINARY
#ifndef O_LARGEFILE
#define O_LARGEFILE 0
#endif // O_LARGEFILE
#if _FXM_PLATFORM_ == _FXM_PLATFORM_LINUX_ || \
_FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ || \
_FXM_PLATFORM_ == _FXM_PLATFORM_ANDROID_
namespace {
void GetFileMode(uint32_t dwModes, int32_t& nFlags, int32_t& nMasks) {
nFlags = O_BINARY | O_LARGEFILE;
if (dwModes & FX_FILEMODE_ReadOnly) {
nFlags |= O_RDONLY;
nMasks = 0;
} else {
nFlags |= O_RDWR | O_CREAT;
if (dwModes & FX_FILEMODE_Truncate) {
nFlags |= O_TRUNC;
}
nMasks = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
}
}
} // namespace
// static
std::unique_ptr<IFX_FileAccess> IFX_FileAccess::Create() {
return pdfium::MakeUnique<CFX_FileAccess_Posix>();
}
CFX_FileAccess_Posix::CFX_FileAccess_Posix() : m_nFD(-1) {}
CFX_FileAccess_Posix::~CFX_FileAccess_Posix() {
Close();
}
bool CFX_FileAccess_Posix::Open(const ByteStringView& fileName,
uint32_t dwMode) {
if (m_nFD > -1)
return false;
int32_t nFlags;
int32_t nMasks;
GetFileMode(dwMode, nFlags, nMasks);
// TODO(tsepez): check usage of c_str() below.
m_nFD = open(fileName.unterminated_c_str(), nFlags, nMasks);
return m_nFD > -1;
}
bool CFX_FileAccess_Posix::Open(const WideStringView& fileName,
uint32_t dwMode) {
return Open(FX_UTF8Encode(fileName).AsStringView(), dwMode);
}
void CFX_FileAccess_Posix::Close() {
if (m_nFD < 0) {
return;
}
close(m_nFD);
m_nFD = -1;
}
FX_FILESIZE CFX_FileAccess_Posix::GetSize() const {
if (m_nFD < 0) {
return 0;
}
struct stat s;
memset(&s, 0, sizeof(s));
fstat(m_nFD, &s);
return s.st_size;
}
FX_FILESIZE CFX_FileAccess_Posix::GetPosition() const {
if (m_nFD < 0) {
return (FX_FILESIZE)-1;
}
return lseek(m_nFD, 0, SEEK_CUR);
}
FX_FILESIZE CFX_FileAccess_Posix::SetPosition(FX_FILESIZE pos) {
if (m_nFD < 0) {
return (FX_FILESIZE)-1;
}
return lseek(m_nFD, pos, SEEK_SET);
}
size_t CFX_FileAccess_Posix::Read(void* pBuffer, size_t szBuffer) {
if (m_nFD < 0) {
return 0;
}
return read(m_nFD, pBuffer, szBuffer);
}
size_t CFX_FileAccess_Posix::Write(const void* pBuffer, size_t szBuffer) {
if (m_nFD < 0) {
return 0;
}
return write(m_nFD, pBuffer, szBuffer);
}
size_t CFX_FileAccess_Posix::ReadPos(void* pBuffer,
size_t szBuffer,
FX_FILESIZE pos) {
if (m_nFD < 0) {
return 0;
}
if (pos >= GetSize()) {
return 0;
}
if (SetPosition(pos) == (FX_FILESIZE)-1) {
return 0;
}
return Read(pBuffer, szBuffer);
}
size_t CFX_FileAccess_Posix::WritePos(const void* pBuffer,
size_t szBuffer,
FX_FILESIZE pos) {
if (m_nFD < 0) {
return 0;
}
if (SetPosition(pos) == (FX_FILESIZE)-1) {
return 0;
}
return Write(pBuffer, szBuffer);
}
bool CFX_FileAccess_Posix::Flush() {
if (m_nFD < 0)
return false;
return fsync(m_nFD) > -1;
}
bool CFX_FileAccess_Posix::Truncate(FX_FILESIZE szFile) {
if (m_nFD < 0)
return false;
return !ftruncate(m_nFD, szFile);
}
#endif
|
