1 files changed, 196 insertions, 0 deletions
diff --git a/core/fxcrt/cfx_fileaccess_windows.cpp b/core/fxcrt/cfx_fileaccess_windows.cpp
new file mode 100644
index 0000000000..b39a4d6efc
--- /dev/null
+++ b/core/fxcrt/cfx_fileaccess_windows.cpp
@@ -0,0 +1,196 @@
+// 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_windows.h"
+
+#include <memory>
+
+#include "core/fxcrt/fx_string.h"
+#include "third_party/base/ptr_util.h"
+
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
+
+namespace {
+
+void GetFileMode(uint32_t dwMode,
+                 uint32_t& dwAccess,
+                 uint32_t& dwShare,
+                 uint32_t& dwCreation) {
+  dwAccess = GENERIC_READ;
+  dwShare = FILE_SHARE_READ | FILE_SHARE_WRITE;
+  if (!(dwMode & FX_FILEMODE_ReadOnly)) {
+    dwAccess |= GENERIC_WRITE;
+    dwCreation = (dwMode & FX_FILEMODE_Truncate) ? CREATE_ALWAYS : OPEN_ALWAYS;
+  } else {
+    dwCreation = OPEN_EXISTING;
+  }
+}
+
+}  // namespace
+
+// static
+std::unique_ptr<IFX_FileAccess> IFX_FileAccess::Create() {
+  return pdfium::MakeUnique<CFX_FileAccess_Windows>();
+}
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+WINBASEAPI BOOL WINAPI GetFileSizeEx(HANDLE hFile, PLARGE_INTEGER lpFileSize);
+WINBASEAPI BOOL WINAPI SetFilePointerEx(HANDLE hFile,
+                                        LARGE_INTEGER liDistanceToMove,
+                                        PLARGE_INTEGER lpNewFilePointer,
+                                        DWORD dwMoveMethod);
+#ifdef __cplusplus
+}
+#endif
+
+CFX_FileAccess_Windows::CFX_FileAccess_Windows() : m_hFile(nullptr) {}
+
+CFX_FileAccess_Windows::~CFX_FileAccess_Windows() {
+  Close();
+}
+
+bool CFX_FileAccess_Windows::Open(const CFX_ByteStringC& fileName,
+                                  uint32_t dwMode) {
+  if (m_hFile)
+    return false;
+
+  uint32_t dwAccess, dwShare, dwCreation;
+  GetFileMode(dwMode, dwAccess, dwShare, dwCreation);
+  m_hFile = ::CreateFileA(fileName.unterminated_c_str(), dwAccess, dwShare,
+                          nullptr, dwCreation, FILE_ATTRIBUTE_NORMAL, nullptr);
+  if (m_hFile == INVALID_HANDLE_VALUE)
+    m_hFile = nullptr;
+
+  return !!m_hFile;
+}
+
+bool CFX_FileAccess_Windows::Open(const CFX_WideStringC& fileName,
+                                  uint32_t dwMode) {
+  if (m_hFile)
+    return false;
+
+  uint32_t dwAccess, dwShare, dwCreation;
+  GetFileMode(dwMode, dwAccess, dwShare, dwCreation);
+  m_hFile =
+      ::CreateFileW((LPCWSTR)fileName.unterminated_c_str(), dwAccess, dwShare,
+                    nullptr, dwCreation, FILE_ATTRIBUTE_NORMAL, nullptr);
+  if (m_hFile == INVALID_HANDLE_VALUE)
+    m_hFile = nullptr;
+
+  return !!m_hFile;
+}
+
+void CFX_FileAccess_Windows::Close() {
+  if (!m_hFile)
+    return;
+
+  ::CloseHandle(m_hFile);
+  m_hFile = nullptr;
+}
+
+FX_FILESIZE CFX_FileAccess_Windows::GetSize() const {
+  if (!m_hFile)
+    return 0;
+
+  LARGE_INTEGER size = {};
+  if (!::GetFileSizeEx(m_hFile, &size))
+    return 0;
+
+  return (FX_FILESIZE)size.QuadPart;
+}
+
+FX_FILESIZE CFX_FileAccess_Windows::GetPosition() const {
+  if (!m_hFile)
+    return (FX_FILESIZE)-1;
+
+  LARGE_INTEGER dist = {};
+  LARGE_INTEGER newPos = {};
+  if (!::SetFilePointerEx(m_hFile, dist, &newPos, FILE_CURRENT))
+    return (FX_FILESIZE)-1;
+
+  return (FX_FILESIZE)newPos.QuadPart;
+}
+
+FX_FILESIZE CFX_FileAccess_Windows::SetPosition(FX_FILESIZE pos) {
+  if (!m_hFile)
+    return (FX_FILESIZE)-1;
+
+  LARGE_INTEGER dist;
+  dist.QuadPart = pos;
+  LARGE_INTEGER newPos = {};
+  if (!::SetFilePointerEx(m_hFile, dist, &newPos, FILE_BEGIN))
+    return (FX_FILESIZE)-1;
+
+  return (FX_FILESIZE)newPos.QuadPart;
+}
+
+size_t CFX_FileAccess_Windows::Read(void* pBuffer, size_t szBuffer) {
+  if (!m_hFile)
+    return 0;
+
+  size_t szRead = 0;
+  if (!::ReadFile(m_hFile, pBuffer, (DWORD)szBuffer, (LPDWORD)&szRead,
+                  nullptr)) {
+    return 0;
+  }
+  return szRead;
+}
+
+size_t CFX_FileAccess_Windows::Write(const void* pBuffer, size_t szBuffer) {
+  if (!m_hFile)
+    return 0;
+
+  size_t szWrite = 0;
+  if (!::WriteFile(m_hFile, pBuffer, (DWORD)szBuffer, (LPDWORD)&szWrite,
+                   nullptr)) {
+    return 0;
+  }
+  return szWrite;
+}
+
+size_t CFX_FileAccess_Windows::ReadPos(void* pBuffer,
+                                       size_t szBuffer,
+                                       FX_FILESIZE pos) {
+  if (!m_hFile)
+    return 0;
+
+  if (pos >= GetSize())
+    return 0;
+
+  if (SetPosition(pos) == (FX_FILESIZE)-1)
+    return 0;
+
+  return Read(pBuffer, szBuffer);
+}
+
+size_t CFX_FileAccess_Windows::WritePos(const void* pBuffer,
+                                        size_t szBuffer,
+                                        FX_FILESIZE pos) {
+  if (!m_hFile) {
+    return 0;
+  }
+  if (SetPosition(pos) == (FX_FILESIZE)-1) {
+    return 0;
+  }
+  return Write(pBuffer, szBuffer);
+}
+
+bool CFX_FileAccess_Windows::Flush() {
+  if (!m_hFile)
+    return false;
+
+  return !!::FlushFileBuffers(m_hFile);
+}
+
+bool CFX_FileAccess_Windows::Truncate(FX_FILESIZE szFile) {
+  if (SetPosition(szFile) == (FX_FILESIZE)-1)
+    return false;
+
+  return !!::SetEndOfFile(m_hFile);
+}
+#endif