#else
  { "DeviceIoControl",          (SYSCALL)0,                      0 },
#endif

#define osDeviceIoControl ((BOOL(WINAPI*)( \
        HANDLE,DWORD,LPVOID,DWORD,LPVOID,DWORD,LPVOID, \
        LPOVERLAPPED))aSyscall[80].pCurrent)





















}; /* End of the overrideable system calls */

/*
** This is the xSetSystemCall() method of sqlite3_vfs for all of the
** "win32" VFSes.  Return SQLITE_OK opon successfully updating the
** system call pointer, or SQLITE_NOTFOUND if there is no configurable
................................................................................
    }
#endif
  }
  OSTRACE(("FCNTL file=%p, rc=SQLITE_NOTFOUND\n", pFile->h));
  return SQLITE_NOTFOUND;
}
































/*
** Return the sector size in bytes of the underlying block device for
** the specified file. This is almost always 512 bytes, but may be
** larger for some devices.
**
** SQLite code assumes this function cannot fail. It also assumes that
** if two files are created in the same file-system directory (i.e.
................................................................................
  }else{
    pFile->lastErrno = osGetLastError();
    winLogError(SQLITE_IOERR_FSTAT, pFile->lastErrno,
                     "winSectorSize1", pFile->zPath);
  }
#elif defined(_WIN32_WINNT) && _WIN32_WINNT >= _WIN32_WINNT_VISTA
  winFile *pFile = (winFile*)id;
  if( winIsDriveLetterAndColon(pFile->zPath) ){
    WCHAR zDisk[] = L"\\\\.\\_:\0"; /* underscore will be drive letter */
    HANDLE hDisk;
    zDisk[4] = (WCHAR)pFile->zPath[0]; /* 'A' to 'Z' only, upper/lower case */
    assert( (zDisk[4]>=L'A' && zDisk[4]<=L'Z')
         || (zDisk[4]>=L'a' && zDisk[4]<=L'z')
    );
    hDisk = osCreateFileW(zDisk, STANDARD_RIGHTS_READ,
................................................................................
    winGetSystemCall,      /* xGetSystemCall */
    winNextSystemCall,     /* xNextSystemCall */
  };
#endif

  /* Double-check that the aSyscall[] array has been constructed
  ** correctly.  See ticket [bb3a86e890c8e96ab] */
  assert( ArraySize(aSyscall)==81 );

  /* get memory map allocation granularity */
  memset(&winSysInfo, 0, sizeof(SYSTEM_INFO));
#if SQLITE_OS_WINRT
  osGetNativeSystemInfo(&winSysInfo);
#else
  osGetSystemInfo(&winSysInfo);

#else
  { "DeviceIoControl",          (SYSCALL)0,                      0 },
#endif

#define osDeviceIoControl ((BOOL(WINAPI*)( \
        HANDLE,DWORD,LPVOID,DWORD,LPVOID,DWORD,LPVOID, \
        LPOVERLAPPED))aSyscall[80].pCurrent)

#if defined(_WIN32_WINNT) && _WIN32_WINNT >= _WIN32_WINNT_VISTA
  { "GetVolumeInformationByHandleW", (SYSCALL)GetVolumeInformationByHandleW, 0 },
#else
  { "GetVolumeInformationByHandleW", (SYSCALL)0,                 0 },
#endif

#define osGetVolumeInformationByHandleW ((BOOL(WINAPI*)( \
        HANDLE,LPWSTR,DWORD,LPDWORD,LPDWORD,LPDWORD,LPWSTR, \
        DWORD))aSyscall[81].pCurrent)

#if defined(_WIN32_WINNT) && _WIN32_WINNT >= _WIN32_WINNT_VISTA
  { "GetVolumeInformationW",     (SYSCALL)GetVolumeInformationW, 0 },
#else
  { "GetVolumeInformationW",     (SYSCALL)0,                     0 },
#endif

#define osGetVolumeInformationW ((BOOL(WINAPI*)( \
        LPCWSTR,LPWSTR,DWORD,LPDWORD,LPDWORD,LPDWORD,LPWSTR, \
        DWORD))aSyscall[82].pCurrent)

}; /* End of the overrideable system calls */

/*
** This is the xSetSystemCall() method of sqlite3_vfs for all of the
** "win32" VFSes.  Return SQLITE_OK opon successfully updating the
** system call pointer, or SQLITE_NOTFOUND if there is no configurable
................................................................................
    }
#endif
  }
  OSTRACE(("FCNTL file=%p, rc=SQLITE_NOTFOUND\n", pFile->h));
  return SQLITE_NOTFOUND;
}

#if defined(_WIN32_WINNT) && _WIN32_WINNT >= _WIN32_WINNT_VISTA
/*
** This function attempts to determine if the specified file resides on the
** same volume as the corresponding root directory.  If not, the specified
** file may be impacted by a hard link, symbolic link, or reparse point (e.g.
** junction).
**
** This function may return false even when the file is on the same volume
** as the corresponding root directory.  This function may return true only
** when there is no doubt that the specified file is on the same volume as
** the corresponding root directory associated with the volume.
*/
static BOOL winIsOnSameVolume(winFile *pFile){
  WCHAR zRoot[] = L"_:\\\0"; /* underscore will be drive letter */
  DWORD dwFileVolumeSerialNumber = 0;
  DWORD dwRootVolumeSerialNumber = 0;

  if ( !osGetVolumeInformationByHandleW(pFile->h, NULL, 0,
                                        &dwFileVolumeSerialNumber, NULL,
                                        NULL, NULL, 0) ){
    return FALSE;
  }
  zRoot[0] = (WCHAR)pFile->zPath[0]; /* 'A' to 'Z' only, upper/lower case */
  if( !osGetVolumeInformationW(zRoot, NULL, 0, &dwRootVolumeSerialNumber,
                               NULL, NULL, NULL, 0) ){
    return FALSE;
  }
  return (dwFileVolumeSerialNumber == dwRootVolumeSerialNumber);
}
#endif

/*
** Return the sector size in bytes of the underlying block device for
** the specified file. This is almost always 512 bytes, but may be
** larger for some devices.
**
** SQLite code assumes this function cannot fail. It also assumes that
** if two files are created in the same file-system directory (i.e.
................................................................................
  }else{
    pFile->lastErrno = osGetLastError();
    winLogError(SQLITE_IOERR_FSTAT, pFile->lastErrno,
                     "winSectorSize1", pFile->zPath);
  }
#elif defined(_WIN32_WINNT) && _WIN32_WINNT >= _WIN32_WINNT_VISTA
  winFile *pFile = (winFile*)id;
  if( winIsDriveLetterAndColon(pFile->zPath) && winIsOnSameVolume(pFile) ){
    WCHAR zDisk[] = L"\\\\.\\_:\0"; /* underscore will be drive letter */
    HANDLE hDisk;
    zDisk[4] = (WCHAR)pFile->zPath[0]; /* 'A' to 'Z' only, upper/lower case */
    assert( (zDisk[4]>=L'A' && zDisk[4]<=L'Z')
         || (zDisk[4]>=L'a' && zDisk[4]<=L'z')
    );
    hDisk = osCreateFileW(zDisk, STANDARD_RIGHTS_READ,
................................................................................
    winGetSystemCall,      /* xGetSystemCall */
    winNextSystemCall,     /* xNextSystemCall */
  };
#endif

  /* Double-check that the aSyscall[] array has been constructed
  ** correctly.  See ticket [bb3a86e890c8e96ab] */
  assert( ArraySize(aSyscall)==83 );

  /* get memory map allocation granularity */
  memset(&winSysInfo, 0, sizeof(SYSTEM_INFO));
#if SQLITE_OS_WINRT
  osGetNativeSystemInfo(&winSysInfo);
#else
  osGetSystemInfo(&winSysInfo);