1 // Copyright 2014 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6
7 #include "core/fxcrt/fxcrt_posix.h"
8
9 #include "core/fxcrt/include/fx_basic.h"
10
11 #if _FXM_PLATFORM_ == _FXM_PLATFORM_LINUX_ || \
12 _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ || \
13 _FXM_PLATFORM_ == _FXM_PLATFORM_ANDROID_
14
15 // static
Create()16 IFXCRT_FileAccess* IFXCRT_FileAccess::Create() {
17 return new CFXCRT_FileAccess_Posix;
18 }
19
FXCRT_Posix_GetFileMode(uint32_t dwModes,int32_t & nFlags,int32_t & nMasks)20 void FXCRT_Posix_GetFileMode(uint32_t dwModes,
21 int32_t& nFlags,
22 int32_t& nMasks) {
23 nFlags = O_BINARY | O_LARGEFILE;
24 if (dwModes & FX_FILEMODE_ReadOnly) {
25 nFlags |= O_RDONLY;
26 nMasks = 0;
27 } else {
28 nFlags |= O_RDWR | O_CREAT;
29 if (dwModes & FX_FILEMODE_Truncate) {
30 nFlags |= O_TRUNC;
31 }
32 nMasks = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
33 }
34 }
CFXCRT_FileAccess_Posix()35 CFXCRT_FileAccess_Posix::CFXCRT_FileAccess_Posix() : m_nFD(-1) {}
~CFXCRT_FileAccess_Posix()36 CFXCRT_FileAccess_Posix::~CFXCRT_FileAccess_Posix() {
37 Close();
38 }
Open(const CFX_ByteStringC & fileName,uint32_t dwMode)39 FX_BOOL CFXCRT_FileAccess_Posix::Open(const CFX_ByteStringC& fileName,
40 uint32_t dwMode) {
41 if (m_nFD > -1) {
42 return FALSE;
43 }
44 int32_t nFlags, nMasks;
45 FXCRT_Posix_GetFileMode(dwMode, nFlags, nMasks);
46 m_nFD = open(fileName.c_str(), nFlags, nMasks);
47 return m_nFD > -1;
48 }
Open(const CFX_WideStringC & fileName,uint32_t dwMode)49 FX_BOOL CFXCRT_FileAccess_Posix::Open(const CFX_WideStringC& fileName,
50 uint32_t dwMode) {
51 return Open(FX_UTF8Encode(fileName).AsStringC(), dwMode);
52 }
Close()53 void CFXCRT_FileAccess_Posix::Close() {
54 if (m_nFD < 0) {
55 return;
56 }
57 close(m_nFD);
58 m_nFD = -1;
59 }
GetSize() const60 FX_FILESIZE CFXCRT_FileAccess_Posix::GetSize() const {
61 if (m_nFD < 0) {
62 return 0;
63 }
64 struct stat s;
65 FXSYS_memset(&s, 0, sizeof(s));
66 fstat(m_nFD, &s);
67 return s.st_size;
68 }
GetPosition() const69 FX_FILESIZE CFXCRT_FileAccess_Posix::GetPosition() const {
70 if (m_nFD < 0) {
71 return (FX_FILESIZE)-1;
72 }
73 return lseek(m_nFD, 0, SEEK_CUR);
74 }
SetPosition(FX_FILESIZE pos)75 FX_FILESIZE CFXCRT_FileAccess_Posix::SetPosition(FX_FILESIZE pos) {
76 if (m_nFD < 0) {
77 return (FX_FILESIZE)-1;
78 }
79 return lseek(m_nFD, pos, SEEK_SET);
80 }
Read(void * pBuffer,size_t szBuffer)81 size_t CFXCRT_FileAccess_Posix::Read(void* pBuffer, size_t szBuffer) {
82 if (m_nFD < 0) {
83 return 0;
84 }
85 return read(m_nFD, pBuffer, szBuffer);
86 }
Write(const void * pBuffer,size_t szBuffer)87 size_t CFXCRT_FileAccess_Posix::Write(const void* pBuffer, size_t szBuffer) {
88 if (m_nFD < 0) {
89 return 0;
90 }
91 return write(m_nFD, pBuffer, szBuffer);
92 }
ReadPos(void * pBuffer,size_t szBuffer,FX_FILESIZE pos)93 size_t CFXCRT_FileAccess_Posix::ReadPos(void* pBuffer,
94 size_t szBuffer,
95 FX_FILESIZE pos) {
96 if (m_nFD < 0) {
97 return 0;
98 }
99 if (pos >= GetSize()) {
100 return 0;
101 }
102 if (SetPosition(pos) == (FX_FILESIZE)-1) {
103 return 0;
104 }
105 return Read(pBuffer, szBuffer);
106 }
WritePos(const void * pBuffer,size_t szBuffer,FX_FILESIZE pos)107 size_t CFXCRT_FileAccess_Posix::WritePos(const void* pBuffer,
108 size_t szBuffer,
109 FX_FILESIZE pos) {
110 if (m_nFD < 0) {
111 return 0;
112 }
113 if (SetPosition(pos) == (FX_FILESIZE)-1) {
114 return 0;
115 }
116 return Write(pBuffer, szBuffer);
117 }
Flush()118 FX_BOOL CFXCRT_FileAccess_Posix::Flush() {
119 if (m_nFD < 0) {
120 return FALSE;
121 }
122 return fsync(m_nFD) > -1;
123 }
Truncate(FX_FILESIZE szFile)124 FX_BOOL CFXCRT_FileAccess_Posix::Truncate(FX_FILESIZE szFile) {
125 if (m_nFD < 0) {
126 return FALSE;
127 }
128 return !ftruncate(m_nFD, szFile);
129 }
130
131 #endif
132