C++ GetFileSizeEx函数代码示例

BOOL CHttpRequestSender::CalcAttachmentPartSize(CString sName, LONGLONG& lSize)
{
  lSize = 0;

  CString sPartHeader;
  BOOL bFormat = FormatAttachmentPartHeader(sName, sPartHeader);
  if(!bFormat)
    return FALSE;
  lSize += sPartHeader.GetLength();

  std::map<CString, CHttpRequestFile>::iterator it = m_Request.m_aIncludedFiles.find(sName);
  if(it==m_Request.m_aIncludedFiles.end())
    return FALSE; 

  CString sFileName = it->second.m_sSrcFileName.GetBuffer(0);
  HANDLE hFile = CreateFile(sFileName, 
     GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, NULL, NULL); 
  if(hFile==INVALID_HANDLE_VALUE)
  {    
    return FALSE; 
  }

  LARGE_INTEGER lFileSize;
  BOOL bGetSize = GetFileSizeEx(hFile, &lFileSize);
  if(!bGetSize)
  {
    CloseHandle(hFile);
    return FALSE;
  }

  lSize += lFileSize.QuadPart;
  CloseHandle(hFile);

  CString sPartFooter;
  bFormat = FormatAttachmentPartFooter(sName, sPartFooter);
  if(!bFormat)
    return FALSE;
  lSize += sPartFooter.GetLength();

  return TRUE;
}

LONG64 CCrashInfoReader::GetUncompressedReportSize(CErrorReportInfo& eri)
{
	// Calculate summary size of all files included into crash report

    LONG64 lTotalSize = 0;
    std::map<CString, ERIFileItem>::iterator it;
    HANDLE hFile = INVALID_HANDLE_VALUE;  
    CString sMsg;
    BOOL bGetSize = FALSE;
    LARGE_INTEGER lFileSize;

	// Walk through all files in the crash report
    for(it=eri.m_FileItems.begin(); it!=eri.m_FileItems.end(); it++)
    {   
		// Get file name
        CString sFileName = it->second.m_sSrcFile.GetBuffer(0);
		// Check file exists
        hFile = CreateFile(sFileName, 
            GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, NULL, NULL); 
        if(hFile==INVALID_HANDLE_VALUE)
            continue; // File does not exist

		// Get file size
        bGetSize = GetFileSizeEx(hFile, &lFileSize);
        if(!bGetSize)
        {
            CloseHandle(hFile);
            continue;
        }

		// Add to the sum
        lTotalSize += lFileSize.QuadPart;

		// Clean up
        CloseHandle(hFile);
        hFile = INVALID_HANDLE_VALUE;
    }

	// Return summary size
    return lTotalSize;
}

static int DOKAN_CALLBACK
MirrorSetAllocationSize(
	LPCWSTR				FileName,
	LONGLONG			AllocSize,
	PDOKAN_FILE_INFO	DokanFileInfo)
{
	WCHAR			filePath[MAX_PATH];
	HANDLE			handle;
	LARGE_INTEGER	fileSize;

	GetFilePath(filePath, MAX_PATH, FileName);

	DbgPrint(L"SetAllocationSize %s, %I64d\n", filePath, AllocSize);

	handle = (HANDLE)DokanFileInfo->Context;
	if (!handle || handle == INVALID_HANDLE_VALUE) {
		DbgPrint(L"\tinvalid handle\n\n");
		return -1;
	}

	if (GetFileSizeEx(handle, &fileSize)) {
		if (AllocSize < fileSize.QuadPart) {
			fileSize.QuadPart = AllocSize;
			if (!SetFilePointerEx(handle, fileSize, NULL, FILE_BEGIN)) {
				DbgPrint(L"\tSetAllocationSize: SetFilePointer eror: %d, "
					L"offset = %I64d\n\n", GetLastError(), AllocSize);
				return GetLastError() * -1;
			}
			if (!SetEndOfFile(handle)) {
				DWORD error = GetLastError();
				DbgPrint(L"\terror code = %d\n\n", error);
				return error * -1;
			}
		}
	} else {
		DWORD error = GetLastError();
		DbgPrint(L"\terror code = %d\n\n", error);
		return error * -1;
	}
	return 0;
}

DWORD FindProcessId (DWORD jobNumber)

/* Obtain the process ID of the specified job number. */
{
	HANDLE hJobData;
	JM_JOB jobRecord;
	DWORD nXfer, fileSizeLow;
	TCHAR jobMgtFileName[MAX_PATH+1];
	OVERLAPPED regionStart;
	LARGE_INTEGER fileSize;

	if ( !GetJobMgtFileName (jobMgtFileName) ) return 0;
	hJobData = CreateFile (jobMgtFileName, GENERIC_READ,
			FILE_SHARE_READ | FILE_SHARE_WRITE,
			NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
	if (hJobData == INVALID_HANDLE_VALUE) return 0;
	/* Position to the correct record, but not past the end of file */
	/* As a variation, use GetFileSize to demonstrate its operation. */
	if (!GetFileSizeEx (hJobData, &fileSize) ||
		(fileSize.HighPart != 0 || SJM_JOB * (jobNumber - 1) > fileSize.LowPart 
		 || fileSize.LowPart > SJM_JOB * MAX_JOBS_ALLOWED))
			return 0;
	fileSizeLow = fileSize.LowPart;
	/* SetFilePoiner is more convenient here than SetFilePointerEx since the the file is known to be "short" ( < 4 GB). */
	SetFilePointer (hJobData, SJM_JOB * (jobNumber - 1), NULL, FILE_BEGIN);
	
	/* Get a shared lock on the record. */
	
	regionStart.Offset = SJM_JOB * (jobNumber - 1);
	regionStart.OffsetHigh = 0; /* Assume a "short" file. */
	regionStart.hEvent = (HANDLE)0;
	LockFileEx (hJobData, 0, 0, SJM_JOB, 0, &regionStart);
	
	if (!ReadFile (hJobData, &jobRecord, SJM_JOB, &nXfer, NULL))
		ReportError (_T ("JobData file error"), 0, TRUE);

	UnlockFileEx (hJobData, 0, SJM_JOB, 0, &regionStart);
	CloseHandle (hJobData);

	return jobRecord.ProcessId;
}

static int
_zip_stat_win32(HANDLE h, zip_stat_t *st, _zip_source_win32_read_file_t *ctx)
{
    FILETIME mtimeft;
    time_t mtime;
    LARGE_INTEGER size;
    int regularp;

    if (!GetFileTime(h, NULL, NULL, &mtimeft)) {
	zip_error_set(&ctx->error, ZIP_ER_READ, _zip_win32_error_to_errno(GetLastError()));
	return -1;
    }
    if (_zip_filetime_to_time_t(mtimeft, &mtime) < 0) {
	zip_error_set(&ctx->error, ZIP_ER_READ, ERANGE);
	return -1;
    }

    regularp = 0;
    if (GetFileType(h) == FILE_TYPE_DISK) {
	regularp = 1;
    }

    if (!GetFileSizeEx(h, &size)) {
	zip_error_set(&ctx->error, ZIP_ER_READ, _zip_win32_error_to_errno(GetLastError()));
	return -1;
    }

    zip_stat_init(st);
    st->mtime = mtime;
    st->valid |= ZIP_STAT_MTIME;
    if (ctx->end != 0) {
	st->size = ctx->end - ctx->start;
	st->valid |= ZIP_STAT_SIZE;
    }
    else if (regularp) {
	st->size = (zip_uint64_t)size.QuadPart;
	st->valid |= ZIP_STAT_SIZE;
    }

    return 0;
}

int uGetFileSize(UFile fd, __int64 * file_size, sys_call_error_fun fun)
{
#ifdef _WIN32
    LARGE_INTEGER size;
    BOOL res = GetFileSizeEx(fd, &size);
    if (res == 0)
        sys_call_error("GetFileSizeEx");
    else
        *file_size = size.QuadPart;
    return res;
#else
    struct stat64 buf;
    if (fstat64(fd, &buf) == -1)
    {
        sys_call_error("fstat64");
        return 0;
    }
    *file_size = buf.st_size;
    return 1;
#endif
}

::FLAC__StreamDecoderLengthStatus
OurDecoder::length_callback(FLAC__uint64 *stream_length)
{
#ifdef PRWIN_ENV
	LARGE_INTEGER lpos;

	BOOL result = GetFileSizeEx(_fp, &lpos);
	
	*stream_length = lpos.QuadPart;
	
	return (result ? FLAC__STREAM_DECODER_LENGTH_STATUS_OK : FLAC__STREAM_DECODER_LENGTH_STATUS_ERROR);
#else
	SInt64 fork_size = 0;
	
	OSErr result = FSGetForkSize(CAST_REFNUM(_fp), &fork_size);
		
	*stream_length = fork_size;
	
	return (result == noErr ? FLAC__STREAM_DECODER_LENGTH_STATUS_OK : FLAC__STREAM_DECODER_LENGTH_STATUS_ERROR);
#endif
}

LONGLONG getFileSize(HANDLE hFile)
{
	LARGE_INTEGER lpFileSize = {0};

	if ((hFile != INVALID_HANDLE_VALUE) && (hFile != 0))
	{
		if (!GetFileSizeEx(hFile, &lpFileSize))
		{
			MessageBox(0, TEXT("GetFileSizeEx failed"), TEXT("Error"), MB_ICONERROR);
			return 0;
		}
		else
		{
			return lpFileSize.QuadPart;
		}
	}
	else
	{
		return 0;
	}
}

size_t File::GetFileSize()
{
	if( !IsValidHandle() )
		return 0;

	size_t Size = 0;
#if _WIN32 || _WIN64
	LARGE_INTEGER LInt;
	Memory::Memzero( &LInt, sizeof(LInt) );
	GetFileSizeEx( m_file_handle, &LInt );
	Size = (size_t) LInt.QuadPart;
	//DWORD dwSize = GetFileSize( m_hFile, NULL );
#else
	size_t Pos = ftell(m_file_handle);
	fseek( m_file_handle, 0, SEEK_END );
	Size = ftell(m_file_handle);
	fseek( m_file_handle, Pos, SEEK_SET );
#endif

	return Size;
}

BOOL CFileMemoryMapping::Init(LPCTSTR szFileName)
{
    if(m_hFile!=INVALID_HANDLE_VALUE)
    {
        // If a file mapping already created, destroy it
        Destroy();
    }

    // Open file handle
    m_hFile = CreateFile(szFileName, GENERIC_READ, FILE_SHARE_READ, 0, OPEN_EXISTING, 0, 0);
    if(m_hFile == INVALID_HANDLE_VALUE)
        return FALSE;

    // Create file mapping
    m_hFileMapping = CreateFileMapping(m_hFile, 0, PAGE_READONLY, 0, 0, 0);
    LARGE_INTEGER size;
    GetFileSizeEx(m_hFile, &size);
    m_uFileLength = size.QuadPart;

    return TRUE;
}

//Return the contents of a text file
void LoadFile(char *path, DataFile *dataFile)
{	
	HANDLE fileHandle = CreateFileA(path, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, NULL, NULL);

	if (fileHandle != INVALID_HANDLE_VALUE)
	{
		LARGE_INTEGER fileSize;

		if (GetFileSizeEx(fileHandle, &fileSize))
		{
			unsigned int fileSize_32bit = (unsigned int)fileSize.QuadPart;
			dataFile->Data = VirtualAlloc(0, fileSize_32bit, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
			
			if (dataFile->Data)
			{
				DWORD bytesRead;
				if (ReadFile(fileHandle, dataFile->Data, fileSize_32bit, &bytesRead, NULL) && fileSize_32bit == bytesRead)
				{
					dataFile->Length = fileSize_32bit;
				}
				else
				{
					//Failed to read file
				}
			}
			else
			{
				//Failed to allocate memory
			}
		}
		else
		{
			//Failed to get file size
		}
	}
	else
	{
		//Failed to create file handle
	}
}

/* return the size of a given file in '*psize'. returns 0 on
 * success, -1 on failure (error code in errno) */
APosixStatus
path_get_size( const char*  path, uint64_t  *psize )
{
#ifdef _WIN32
    /* avoid _stat64 which is only defined in MSVCRT.DLL, not CRTDLL.DLL */
    /* do not use OpenFile() because it has strange search behaviour that could */
    /* result in getting the size of a different file */
    LARGE_INTEGER  size;
    HANDLE  file = CreateFile( /* lpFilename */        path,
                               /* dwDesiredAccess */   GENERIC_READ,
                               /* dwSharedMode */     FILE_SHARE_READ|FILE_SHARE_WRITE,
                               /* lpSecurityAttributes */  NULL,
                               /* dwCreationDisposition */ OPEN_EXISTING,
                               /* dwFlagsAndAttributes */  0,
                               /* hTemplateFile */      NULL );
    if (file == INVALID_HANDLE_VALUE) {
        /* ok, just to play fair */
        errno = ENOENT;
        return -1;
    }
    if (!GetFileSizeEx(file, &size)) {
        /* maybe we tried to get the size of a pipe or something like that ? */
        *psize = 0;
    }
    else {
        *psize = (uint64_t) size.QuadPart;
    }
    CloseHandle(file);
    return 0;
#else
    int    ret;
    struct stat  st;

    CHECKED(ret, stat(path, &st));
    if (ret == 0) {
        *psize = (uint64_t) st.st_size;
    }
    return ret;
#endif
}

LWS_VISIBLE lws_fop_fd_t
_lws_plat_file_open(const struct lws_plat_file_ops *fops, const char *filename,
		    const char *vpath, lws_fop_flags_t *flags)
{
	HANDLE ret;
	WCHAR buf[MAX_PATH];
	lws_fop_fd_t fop_fd;
	LARGE_INTEGER llFileSize = {0};

	MultiByteToWideChar(CP_UTF8, 0, filename, -1, buf, ARRAY_SIZE(buf));
	if (((*flags) & 7) == _O_RDONLY) {
		ret = CreateFileW(buf, GENERIC_READ, FILE_SHARE_READ,
			  NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
	} else {
		ret = CreateFileW(buf, GENERIC_WRITE, 0, NULL,
			  CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
	}

	if (ret == LWS_INVALID_FILE)
		goto bail;

	fop_fd = malloc(sizeof(*fop_fd));
	if (!fop_fd)
		goto bail;

	fop_fd->fops = fops;
	fop_fd->fd = ret;
	fop_fd->filesystem_priv = NULL; /* we don't use it */
	fop_fd->flags = *flags;
	fop_fd->len = GetFileSize(ret, NULL);
	if(GetFileSizeEx(ret, &llFileSize))
		fop_fd->len = llFileSize.QuadPart;

	fop_fd->pos = 0;

	return fop_fd;

bail:
	return NULL;
}

bool LWOFile::LoadFromFile(const char *strFile)
{
  // try to open file
  HANDLE hFile=CreateFileA(strFile, GENERIC_READ, FILE_SHARE_READ, NULL,
                          OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
  if(hFile==INVALID_HANDLE_VALUE)
  {
    AddError("Could not open file: " + std::string(strFile));
    return false;
  }

  // get file size
  LARGE_INTEGER LI_Size;
  if(!GetFileSizeEx(hFile,&LI_Size))
  {
    AddError("Could not get file size!");
    return false;
  }
  unsigned int iFileSize=(unsigned int)LI_Size.QuadPart;

  // allocate memory to hold the file
  char *pData=new char[iFileSize];

  // read file to memory
  DWORD iBytesRead=0;
  if(!ReadFile(hFile,pData,iFileSize,&iBytesRead,NULL) || iBytesRead!=iFileSize)
  {
    AddError("Reading file failed!");
    delete[] pData;
    CloseHandle(hFile);
    return false;
  }

  // load
  if(!LoadFromMemory(pData, iFileSize)) return false;

  delete[] pData;
  CloseHandle(hFile);
  return true;
}

BOOL kull_m_file_readData(PCWCHAR fileName, PBYTE * data, PDWORD lenght)	// for little files !
{
	BOOL reussite = FALSE;
	DWORD dwBytesReaded;
	LARGE_INTEGER filesize;

	HANDLE hFile = CreateFile(fileName, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
	if(hFile && hFile != INVALID_HANDLE_VALUE)
	{
		if(GetFileSizeEx(hFile, &filesize) && !filesize.HighPart)
		{
			*lenght = filesize.LowPart;
			if(*data = (PBYTE) LocalAlloc(LPTR, *lenght))
			{
				if(!(reussite = ReadFile(hFile, *data, *lenght, &dwBytesReaded, NULL) && (*lenght == dwBytesReaded)))
					LocalFree(*data);
			}
		}
		CloseHandle(hFile);
	}
	return reussite;
}