C / C++ / MFC

Re: GetShortPathNameW issue with UNC path (more than 255 chars)

23-Apr-08 23:52

Here is the sample code

<br />
DWORD dw =0;<br />
wstring m_UNCPath = L"Long file name";  // more then 255 chars<br />
<br />
long length = GetShortPathNameW(m_UNCPath.c_str(), NULL, 0);<br />
DWORD dwerror = GetLastError();<br />
<br />
// dwerror return "123" and length =0<br />
<br />
length += 2;<br />
wchar_t* buffer = new wchar_t[length];<br />
<br />
dwerror= GetShortPathNameW(m_UNCPath.c_str(), buffer, length); <br />

vikramlinux24-Apr-08 0:25

Re: GetShortPathNameW issue with UNC path (more than 255 chars)

24-Apr-08 0:25

Some updates here are
If the path is given like
"\\?\c:\..."
things works

but for path
"\\?\UNC\c:\..."

things fails.

Most important I want to get shortpath name over network
so my path becomes

"\\?\UNC\ip_address\..."
Here things fails badly.

CPallini24-Apr-08 0:26

Re: GetShortPathNameW issue with UNC path (more than 255 chars)

24-Apr-08 0:26

My test:

void main()
{
  WCHAR szShort[MAX_PATH];
  DWORD dw =0;
  wstring m_UNCPath = L"C:\\Documents and Settings\\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234.txt"; // more then 255 chars

  long length = GetShortPathNameW(m_UNCPath.c_str(), szShort, MAX_PATH);
}

resulting value of szShort:

"C:\DOCUME~1\012345~1.TXT"

vikramlinux24-Apr-08 0:29

Re: GetShortPathNameW issue with UNC path (more than 255 chars)

24-Apr-08 0:29

Please recheck your path. I guess it's less then 255 chars.

CPallini24-Apr-08 0:44

Re: GetShortPathNameW issue with UNC path (more than 255 chars)

24-Apr-08 0:44

Damn, you're right, Windows truncated the name...
Smile | :)

vikramlinux24-Apr-08 0:46

open ssl based window c,c++ application

24-Apr-08 0:46

See you can not create a long file path simply in windows explorer.It is not supported. You need to call apis like CreateDirectoryEx and CreateFileW to create such path and write a file inside it.

SSL decryption

Dr. Kelwin23-Apr-08 3:41

Dr. Kelwin

23-Apr-08 3:41

Hi! I have some transport which based on winsock. Client(FTPS) send to me some data over SSL, and i receive it with (for example):

<br />
...<br />
if (WSARecv(AcceptSocket, &DataBuf, 1, &RecvBytes, &Flags, &AcceptOverlapped, NULL) == SOCKET_ERROR){<br />
     if (WSAGetLastError() != WSA_IO_PENDING)<br />
          printf("Error occured at WSARecv()\n");<br />
}<br />
...<br />

how can i decrypt received data in DataBuf, if i have certificate, puclic and private keys?

Re: SSL decryption

led mike23-Apr-08 8:29

led mike

23-Apr-08 8:29

Dr. Kelwin wrote:
if i have certificate, puclic and private keys?

Well that's not how SSL works so I don't know if this will help

http://msdn2.microsoft.com/en-us/library/ms867086.aspx[^]

http://msdn2.microsoft.com/en-us/library/ms867086.aspx[^]

led mike

amit_pansuria23-Apr-08 3:28

amit_pansuria

23-Apr-08 3:28

helo,

I want to write socket client application by using c or c++ in window without using any Winsock or MFC class.
how do i achieve it.
I search it but not getting exactly .

Regards,
Amit

CPallini23-Apr-08 3:42

23-Apr-08 3:42

Are you kidding?
AFAIK even Cygwin uses Winsock library.
Smile | :)

Nemanja Trifunovic23-Apr-08 3:56

Nemanja Trifunovic

23-Apr-08 3:56

There are many network libraries out there. For instance, take a look at Boost Asio[^]

Programming Blog

utf8-cpp

Maximilien23-Apr-08 4:17

Maximilien

23-Apr-08 4:17

Don't you have to write your own communication interface between the TCP/IP stack and your software ? or something like that ?

Maximilien Lincourt
Your Head A Splode - Strong Bad

led mike23-Apr-08 8:32

led mike

23-Apr-08 8:32

amit_pansuria wrote:
I want to write socket client application by using c or c++ in window without using any Winsock

Winsock2 was modeled after the Berkley Sockets API and then extended to add Windows specific and other features. So if you "want" to use it to write Berkley Socket code you can get very close. I can't tell from your post if that is what you "want".

http://en.wikipedia.org/wiki/Winsock[^]

http://blogs.msdn.com/wndp/archive/2006/02/24/538746.aspx[^]

http://www.sockets.com/winsock2.htm[^]

led mike

Hamid_RT24-Apr-08 5:45

Hamid_RT

24-Apr-08 5:45

See here[^] does helpful?

DirectSound buffers

Hanan88823-Apr-08 2:30

23-Apr-08 2:30

Does it seem reasonable to load a 40-sec WAV to a 'static' DirectSound secondary buffer to play as my game background-music ?

If not, why not ?

The other option, AFAIK, is having 'streaming' buffer for that. Which will be more complicated programmatically.

Re: DirectSound buffers

Mark Salsbery23-Apr-08 9:41

Mark Salsbery

23-Apr-08 9:41

Hanan888 wrote:
Does it seem reasonable to load a 40-sec WAV to a 'static' DirectSound secondary buffer

Yes.

Maximum buffer size is 0x0FFFFFFF...40 seconds 0f 44.1kHz, 24-bit stereo
audio samples is around 10MB (if I did the math correctly Smile | :)

).

Should work fine.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: DirectSound buffers

Hanan88823-Apr-08 22:26

How many pixels thick are the frame of my window (Win32)

23-Apr-08 22:26

Thanks.

So, my kitschy background music won't break the system after all... perhaps the people listening to it would... Smile | :)

Mark Salsbery wrote:
Maximum buffer size is 0x0FFFFFFF...40 seconds 0f 44.1kHz, 24-bit stereo
audio samples is around 10MB (if I did the math correctly ).

Have you calculated something like this -

buffer size:
0X0FFFFFFF = 16^7 - 1 bytes = 268,435,455 bytes
WAV size:
40 sec * 3 bytes per sample (24-bit) * 44100 samples per second = 5,292,000 bytes

Re: DirectSound buffers

Mark Salsbery24-Apr-08 5:50

Mark Salsbery

24-Apr-08 5:50

Hanan888 wrote:
Have you calculated something like this -
buffer size:
0X0FFFFFFF = 16^7 - 1 bytes = 268,435,455 bytes
WAV size:
40 sec * 3 bytes per sample (24-bit) * 44100 samples per second = 5,292,000 bytes

Yes, except I took a worse-case scenario (unless you use a higher sampling rate Smile | :)

) and chose
stereo, so I multiplied your WAV size by 2.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Hanan88823-Apr-08 2:16

Re: How many pixels thick are the frame of my window (Win32)

23-Apr-08 2:16

I'm developing an animated-game on Win32.

It runs only in windowed mode.

I'm creating my window with the styles WS_OVERLAPPED | WS_SYSMENU so that it has a blue frame, with a blue title on top, much like the window you have right now if you're a Windows user.

We decided we want to support users with 800X600 screen (is there any of those left?), by means we want the window to fit into a 800X600 screen. If I create the window in size 800X600, it won't fit, since the frame is not included in the 800X600 I specified, it will be like 810X625 or something like that.

The question is how do I know the exact size in pixels of the frame ? or what might be considered the maximal size so I could just do for example 740X550 window and it will always fit ?

Graham Bradshaw23-Apr-08 2:35

Graham Bradshaw

23-Apr-08 2:35

Take a look at the SystemParametersInfo API function.

Re: How many pixels thick are the frame of my window (Win32)

Hanan88823-Apr-08 2:43

Re: How many pixels thick are the frame of my window (Win32)

23-Apr-08 2:43

Thanks.

CPallini23-Apr-08 2:37

Re: How many pixels thick are the frame of my window (Win32)

23-Apr-08 2:37

Hanan888 wrote:
If I create the window in size 800X600, it won't fit, since the frame is not included in the 800X600 I specified

AFAIK the above is wrong.
Smile | :)

Hanan88823-Apr-08 2:53

Re: How many pixels thick are the frame of my window (Win32)

23-Apr-08 2:53

As i said, the entire size is more than 800X600, so how can it fit into 800X600 screen ? some parts will be 'out of the screen'.

I tried it now, don't look that horrible, actually.

Maybe we'll just say, If you got a 800X600, it's your own problem... (in the About dialog) Smile | :)

CPallini23-Apr-08 3:19