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 "fxcrt_platforms.h"
8
9#include "core/include/fxcrt/fx_basic.h"
10
11#if (_FXM_PLATFORM_ != _FXM_PLATFORM_WINDOWS_ && \
12     _FXM_PLATFORM_ != _FXM_PLATFORM_LINUX_ &&   \
13     _FXM_PLATFORM_ != _FXM_PLATFORM_APPLE_ &&   \
14     _FXM_PLATFORM_ != _FXM_PLATFORM_ANDROID_)
15IFXCRT_FileAccess* FXCRT_FileAccess_Create() {
16  return new CFXCRT_FileAccess_CRT;
17}
18void FXCRT_GetFileModeString(FX_DWORD dwModes, CFX_ByteString& bsMode) {
19  if (dwModes & FX_FILEMODE_ReadOnly) {
20    bsMode = "rb";
21  } else if (dwModes & FX_FILEMODE_Truncate) {
22    bsMode = "w+b";
23  } else {
24    bsMode = "a+b";
25  }
26}
27void FXCRT_GetFileModeString(FX_DWORD dwModes, CFX_WideString& wsMode) {
28  if (dwModes & FX_FILEMODE_ReadOnly) {
29    wsMode = FX_WSTRC(L"rb");
30  } else if (dwModes & FX_FILEMODE_Truncate) {
31    wsMode = FX_WSTRC(L"w+b");
32  } else {
33    wsMode = FX_WSTRC(L"a+b");
34  }
35}
36CFXCRT_FileAccess_CRT::CFXCRT_FileAccess_CRT() : m_hFile(NULL) {}
37CFXCRT_FileAccess_CRT::~CFXCRT_FileAccess_CRT() {
38  Close();
39}
40FX_BOOL CFXCRT_FileAccess_CRT::Open(const CFX_ByteStringC& fileName,
41                                    FX_DWORD dwMode) {
42  if (m_hFile) {
43    return FALSE;
44  }
45  CFX_ByteString strMode;
46  FXCRT_GetFileModeString(dwMode, strMode);
47  m_hFile = FXSYS_fopen(fileName.GetCStr(), strMode.c_str());
48  return m_hFile != NULL;
49}
50FX_BOOL CFXCRT_FileAccess_CRT::Open(const CFX_WideStringC& fileName,
51                                    FX_DWORD dwMode) {
52  if (m_hFile) {
53    return FALSE;
54  }
55  CFX_WideString strMode;
56  FXCRT_GetFileModeString(dwMode, strMode);
57  m_hFile = FXSYS_wfopen(fileName.GetPtr(), strMode.c_str());
58  return m_hFile != NULL;
59}
60void CFXCRT_FileAccess_CRT::Close() {
61  if (!m_hFile) {
62    return;
63  }
64  FXSYS_fclose(m_hFile);
65  m_hFile = NULL;
66}
67void CFXCRT_FileAccess_CRT::Release() {
68  delete this;
69}
70FX_FILESIZE CFXCRT_FileAccess_CRT::GetSize() const {
71  if (!m_hFile) {
72    return 0;
73  }
74  FX_FILESIZE pos = (FX_FILESIZE)FXSYS_ftell(m_hFile);
75  FXSYS_fseek(m_hFile, 0, FXSYS_SEEK_END);
76  FX_FILESIZE size = (FX_FILESIZE)FXSYS_ftell(m_hFile);
77  FXSYS_fseek(m_hFile, pos, FXSYS_SEEK_SET);
78  return size;
79}
80FX_FILESIZE CFXCRT_FileAccess_CRT::GetPosition() const {
81  if (!m_hFile) {
82    return (FX_FILESIZE)-1;
83  }
84  return (FX_FILESIZE)FXSYS_ftell(m_hFile);
85}
86FX_FILESIZE CFXCRT_FileAccess_CRT::SetPosition(FX_FILESIZE pos) {
87  if (!m_hFile) {
88    return (FX_FILESIZE)-1;
89  }
90  FXSYS_fseek(m_hFile, pos, FXSYS_SEEK_SET);
91  return (FX_FILESIZE)FXSYS_ftell(m_hFile);
92}
93size_t CFXCRT_FileAccess_CRT::Read(void* pBuffer, size_t szBuffer) {
94  if (!m_hFile) {
95    return 0;
96  }
97  return FXSYS_fread(pBuffer, 1, szBuffer, m_hFile);
98}
99size_t CFXCRT_FileAccess_CRT::Write(const void* pBuffer, size_t szBuffer) {
100  if (!m_hFile) {
101    return 0;
102  }
103  return FXSYS_fwrite(pBuffer, 1, szBuffer, m_hFile);
104}
105size_t CFXCRT_FileAccess_CRT::ReadPos(void* pBuffer,
106                                      size_t szBuffer,
107                                      FX_FILESIZE pos) {
108  if (!m_hFile) {
109    return (FX_FILESIZE)-1;
110  }
111  FXSYS_fseek(m_hFile, pos, FXSYS_SEEK_SET);
112  return FXSYS_fread(pBuffer, 1, szBuffer, m_hFile);
113}
114size_t CFXCRT_FileAccess_CRT::WritePos(const void* pBuffer,
115                                       size_t szBuffer,
116                                       FX_FILESIZE pos) {
117  if (!m_hFile) {
118    return (FX_FILESIZE)-1;
119  }
120  FXSYS_fseek(m_hFile, pos, FXSYS_SEEK_SET);
121  return FXSYS_fwrite(pBuffer, 1, szBuffer, m_hFile);
122}
123FX_BOOL CFXCRT_FileAccess_CRT::Flush() {
124  if (!m_hFile) {
125    return FALSE;
126  }
127  return !FXSYS_fflush(m_hFile);
128}
129FX_BOOL CFXCRT_FileAccess_CRT::Truncate(FX_FILESIZE szFile) {
130  return FALSE;
131}
132#endif
133