text: // 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 "../../include/fxcrt/fx_string.h"
  #include "fxcrt_windows.h"
  
  #if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
  FX_BOOL FX_File_Exist(const CFX_ByteStringC& fileName)
  {
      FX_DWORD dwAttri = ::GetFileAttributesA(fileName.GetCStr());
      if (dwAttri == -1) {
          return FALSE;
      }
      return (dwAttri & FILE_ATTRIBUTE_DIRECTORY) == 0;
  }
  FX_BOOL FX_File_Exist(const CFX_WideStringC& fileName)
  {
      FX_DWORD dwAttri = ::GetFileAttributesW((LPCWSTR)fileName.GetPtr());
      if (dwAttri == -1) {
          return FALSE;
      }
      return (dwAttri & FILE_ATTRIBUTE_DIRECTORY) == 0;
  }
  IFXCRT_FileAccess* FXCRT_FileAccess_Create()
  {
      return new CFXCRT_FileAccess_Win64;
  }
  void FXCRT_Windows_GetFileMode(FX_DWORD dwMode, FX_DWORD &dwAccess, FX_DWORD &dwShare, FX_DWORD &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;
      }
  }
  #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
  CFXCRT_FileAccess_Win64::CFXCRT_FileAccess_Win64()
      : m_hFile(NULL)
  {
  }
  CFXCRT_FileAccess_Win64::~CFXCRT_FileAccess_Win64()
  {
      Close();
  }
  FX_BOOL CFXCRT_FileAccess_Win64::Open(const CFX_ByteStringC& fileName, FX_DWORD dwMode)
  {
      if (m_hFile) {
          return FALSE;
      }
      FX_DWORD dwAccess, dwShare, dwCreation;
      FXCRT_Windows_GetFileMode(dwMode, dwAccess, dwShare, dwCreation);
      m_hFile = ::CreateFileA(fileName.GetCStr(), dwAccess, dwShare, NULL, dwCreation, FILE_ATTRIBUTE_NORMAL, NULL);
      if (m_hFile == INVALID_HANDLE_VALUE) {
          m_hFile = NULL;
      }
      return m_hFile != NULL;
  }
  FX_BOOL CFXCRT_FileAccess_Win64::Open(const CFX_WideStringC& fileName, FX_DWORD dwMode)
  {
      if (m_hFile) {
          return FALSE;
      }
      FX_DWORD dwAccess, dwShare, dwCreation;
      FXCRT_Windows_GetFileMode(dwMode, dwAccess, dwShare, dwCreation);
      m_hFile = ::CreateFileW((LPCWSTR)fileName.GetPtr(), dwAccess, dwShare, NULL, dwCreation, FILE_ATTRIBUTE_NORMAL, NULL);
      if (m_hFile == INVALID_HANDLE_VALUE) {
          m_hFile = NULL;
      }
      return m_hFile != NULL;
  }
  void CFXCRT_FileAccess_Win64::Close()
  {
      if (!m_hFile) {
          return;
      }
      ::CloseHandle(m_hFile);
      m_hFile = NULL;
  }
  void CFXCRT_FileAccess_Win64::Release()
  {
      delete this;
  }
  FX_FILESIZE CFXCRT_FileAccess_Win64::GetSize() const
  {
      if (!m_hFile) {
          return 0;
      }
      LARGE_INTEGER size = {};
      if (!::GetFileSizeEx(m_hFile, &size)) {
          return 0;
      }
      return (FX_FILESIZE)size.QuadPart;
  }
  FX_FILESIZE CFXCRT_FileAccess_Win64::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 CFXCRT_FileAccess_Win64::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 CFXCRT_FileAccess_Win64::Read(void* pBuffer, size_t szBuffer)
  {
      if (!m_hFile) {
          return 0;
      }
      size_t szRead = 0;
      if (!::ReadFile(m_hFile, pBuffer, (DWORD)szBuffer, (LPDWORD)&szRead, NULL)) {
          return 0;
      }
      return szRead;
  }
  size_t CFXCRT_FileAccess_Win64::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, NULL)) {
          return 0;
      }
      return szWrite;
  }
  size_t CFXCRT_FileAccess_Win64::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 CFXCRT_FileAccess_Win64::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);
  }
  FX_BOOL CFXCRT_FileAccess_Win64::Flush()
  {
      if (!m_hFile) {
          return FALSE;
      }
      return ::FlushFileBuffers(m_hFile);
  }
  FX_BOOL CFXCRT_FileAccess_Win64::Truncate(FX_FILESIZE szFile)
  {
      if (SetPosition(szFile) == (FX_FILESIZE) - 1) {
          return FALSE;
      }
      return ::SetEndOfFile(m_hFile);
  }
  FX_BOOL FX_File_Delete(const CFX_ByteStringC& fileName)
  {
      return ::DeleteFileA(fileName.GetCStr());
  }
  FX_BOOL FX_File_Delete(const CFX_WideStringC& fileName)
  {
      return ::DeleteFileW((LPCWSTR)fileName.GetPtr());
  }
  FX_BOOL FX_File_Copy(const CFX_ByteStringC& fileNameSrc, const CFX_ByteStringC& fileNameDst)
  {
      return ::CopyFileA(fileNameSrc.GetCStr(), fileNameDst.GetCStr(), FALSE);
  }
  FX_BOOL FX_File_Copy(const CFX_WideStringC& fileNameSrc, const CFX_WideStringC& fileNameDst)
  {
      return ::CopyFileW((LPCWSTR)fileNameSrc.GetPtr(), (LPCWSTR)fileNameDst.GetPtr(), FALSE);
  }
  FX_BOOL FX_File_Move(const CFX_ByteStringC& fileNameSrc, const CFX_ByteStringC& fileNameDst)
  {
      return ::MoveFileA(fileNameSrc.GetCStr(), fileNameDst.GetCStr());
  }
  FX_BOOL FX_File_Move(const CFX_WideStringC& fileNameSrc, const CFX_WideStringC& fileNameDst)
  {
      return ::MoveFileW((LPCWSTR)fileNameSrc.GetPtr(), (LPCWSTR)fileNameDst.GetPtr());
  }
  #endif
  