/**----------------------------------------------------------------------------
\brief 파일 IO 를 위해 파일을 오픈한다.
\param
\return
\code
\endcode
-----------------------------------------------------------------------------*/
DTSTATUS
FileIoHelper::FIOpenForRead(
IN std::wstring FilePath
)
{
if (TRUE == Initialized()) { FIOClose(); }
mReadOnly = TRUE;
if (TRUE != is_file_existsW(FilePath.c_str()))
{
log_err
"no file exists. file=%ws", FilePath.c_str()
log_end
return DTS_NO_FILE_EXIST;
}
/**----------------------------------------------------------------------------
\brief 파일 IO 를 위해 파일을 오픈한다.
\param
\return
\code
\endcode
-----------------------------------------------------------------------------*/
DTSTATUS
FileIoHelper::FIOpenForRead(
IN std::wstring FilePath
)
{
if (TRUE == Initialized()) { FIOClose(); }
mReadOnly = TRUE;
if (TRUE != is_file_existsW(FilePath.c_str()))
{
printf(
"no file exists. file=%ws", FilePath.c_str()
);
return DTS_NO_FILE_EXIST;
}
#pragma warning(disable: 4127)
DTSTATUS status = DTS_WINAPI_FAILED;
do
{
mFileHandle = CreateFileW(
FilePath.c_str(),
GENERIC_READ,
NULL,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL
);
if (INVALID_HANDLE_VALUE == mFileHandle)
{
printf(
"CreateFile(%ws) failed, gle=0x%08x",
FilePath.c_str(),
GetLastError()
);
break;
}
// check file size
//
if (TRUE != GetFileSizeEx(mFileHandle, &mFileSize))
{
printf(
"%ws, can not get file size, gle=0x%08x",
FilePath.c_str(),
GetLastError()
);
break;
}
mFileMap = CreateFileMapping(
mFileHandle,
NULL,
PAGE_READONLY,
0,
0,
NULL
);
if (NULL == mFileMap)
{
printf(
"CreateFileMapping(%ws) failed, gle=0x%08x",
FilePath.c_str(),
GetLastError()
);
break;
}
status = DTS_SUCCESS;
} while (FALSE);
#pragma warning(default: 4127)
if (TRUE != DT_SUCCEEDED(status))
{
if (INVALID_HANDLE_VALUE != mFileHandle)
{
CloseHandle(mFileHandle);
mFileHandle = INVALID_HANDLE_VALUE;
}
if (NULL != mFileMap) CloseHandle(mFileMap);
}
return status;
}
/**----------------------------------------------------------------------------
\brief FileSize 바이트 짜리 파일을 생성한다.
\param
\return
\code
\endcode
-----------------------------------------------------------------------------*/
DTSTATUS
FileIoHelper::FIOCreateFile(
IN std::wstring FilePath,
IN LARGE_INTEGER FileSize
)
{
if (TRUE == Initialized()) { FIOClose(); }
if (FileSize.QuadPart == 0) return DTS_INVALID_PARAMETER;
mReadOnly = FALSE;
#pragma warning(disable: 4127)
DTSTATUS status = DTS_WINAPI_FAILED;
do
{
mFileSize = FileSize;
mFileHandle = CreateFileW(
FilePath.c_str(),
GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ, // write 도중 다른 프로세스에서 읽기가 가능
NULL,
CREATE_ALWAYS,
FILE_ATTRIBUTE_NORMAL,
NULL
);
if (INVALID_HANDLE_VALUE == mFileHandle)
{
printf(
"CreateFile(%ws) failed, gle=0x%08x",
FilePath.c_str(),
GetLastError()
);
break;
}
// increase file size
//
if (TRUE != SetFilePointerEx(mFileHandle, mFileSize, NULL, FILE_BEGIN))
{
printf(
"SetFilePointerEx( move to %I64d ) failed, gle=0x%08x",
FileSize.QuadPart, GetLastError()
);
break;
}
if (TRUE != SetEndOfFile(mFileHandle))
{
printf("SetEndOfFile( ) failed, gle=0x%08x", GetLastError());
break;
}
mFileMap = CreateFileMapping(
mFileHandle,
NULL,
PAGE_READWRITE,
0,
0,
NULL
);
if (NULL == mFileMap)
{
printf(
"CreateFileMapping(%ws) failed, gle=0x%08x",
FilePath.c_str(),
GetLastError()
);
break;
}
status = DTS_SUCCESS;
} while (FALSE);
#pragma warning(default: 4127)
if (TRUE != DT_SUCCEEDED(status))
{
if (INVALID_HANDLE_VALUE != mFileHandle)
{
CloseHandle(mFileHandle);
mFileHandle = INVALID_HANDLE_VALUE;
}
if (NULL != mFileMap) CloseHandle(mFileMap);
}
return status;
}