C / C++ / MFC Discussion Boards

hkl14-Oct-03 12:04

14-Oct-03 12:04

Hi,

I am using VC++ 6.0 to write a Win32 console app. Does anyone know how I can read all the file names in a directory if user specifies the directory for input file(s)?
Thanks a lot!

Re: Read all files in a specified directory

Joel Holdsworth14-Oct-03 12:20

Joel Holdsworth

14-Oct-03 12:20

try doing...

_finddata_t fileinfo;
long hFile;


_chdir( --dirname-- );


if( (hFile = _findfirst( "*", &fileinfo )) == -1L )
   --- no files in director ---
else
{
   do
   {
      --- called per file ---
      fileinfo.name contains the filname!

   } while( _findnext( hFile, &fileinfo ) == 0 );

   _findclose( hFile );
}

*¨¨`)
¸¸.·´ ¸.·*¨¨`)
(¸¸.·* ¸ .·*
¸¸.·*
(¸¸.~~> Joel Holdsworth.

Re: Read all files in a specified directory

hkl14-Oct-03 12:51

hkl

14-Oct-03 12:51

Wow~! Thanks so much, guys!

Joel Holdsworth wrote:
_chdir( --dirname-- );

May I know what _chdir is? or what it means?
Is it part of the fileinfo structure?
Because I got an error msg for this.

thanks again. Big Grin | :-D

Re: Read all files in a specified directory

David Crow15-Oct-03 7:59

David Crow

15-Oct-03 7:59

hkl wrote:
May I know what _chdir is? or what it means?

It changes to the specified directory (i.e., CWD).

Five birds are sitting on a fence.
Three of them decide to fly off.
How many are left?

Re: Read all files in a specified directory

vcplusplus14-Oct-03 12:25

vcplusplus

14-Oct-03 12:25

CFileFind finder;
BOOL bWorking = finder.FindFile("*.*");
while (bWorking)
{
   bWorking = finder.FindNextFile();
   cout << (LPCTSTR) finder.GetFileName() << endl;
}

Re: Read all files in a specified directory

hkl14-Oct-03 12:54

hkl

14-Oct-03 12:54

Thanks. But CFileFind doesn't work in my case.
I am only writing a console app, not MFC.
(Or may be CFileFind can apply, but I don't know how.) Smile | :)

Re: Read all files in a specified directory

georgiek5014-Oct-03 15:09

georgiek50

14-Oct-03 15:09

Try this:

HANDLE hFile;
WIN32_FIND_DATA wfd;

hFile = FindFirstFile("*.*", &wfd);

while ( FindNextFile(hFile, &wfd) != 0 )
{
     // your code here
     
     // include this is if you don't want the '.' and '..' to show up

     if ( (strcmp(wfd.cFileName, "..") != 0 ) && (strcmp(wfd.cFileName, ".")  != 0 )
             // your code here eg. cout << wfd.cFileName << endl;

    // include something like this if you don't want the directories:
    if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
        // your code here eg. continue;
}

FindClose(hFile)

Re: Read all files in a specified directory

alex.barylski14-Oct-03 19:23

alex.barylski

14-Oct-03 19:23

Might wanna look at:
http://www.codeproject.com/file/sadirread.asp[^]

I'm drinking triples, seeing double and acting single Cool | :cool:

Network Spy ( Internet Spy )

asd175314-Oct-03 11:47

asd1753

14-Oct-03 11:47

hi I want to spy all packets that my computer recieving from internet or network ,

are there any one help me and have a sample code ?

thanls alot

Re: Network Spy ( Internet Spy )

pma14-Oct-03 20:16

pma

14-Oct-03 20:16

go to http://winpcap.polito.it for more details !

Ending one application from within another

georgiek5014-Oct-03 11:45

georgiek50

14-Oct-03 11:45

I have an app which start up another exe file at some point and what I am looking to do is have the newly opened program close down the program that started it. Is this possilbe to do without closing both programs? Win32 please.

Re: Ending one application from within another

Michael Dunn14-Oct-03 18:00

Michael Dunn

14-Oct-03 18:00

There are various IPC methods. The simplest would be to pass the first app's main window handle on the command line of the second app. The second can then post a WM_CLOSE message to the first.

--Mike--
Ericahist | CP SearchBar v2.0.2 | Homepage | RightClick-Encrypt | 1ClickPicGrabber
Actual sign at the laundromat I go to: "No tinting or dying."

LNK2005

jimNLX14-Oct-03 11:31

jimNLX

14-Oct-03 11:31

I get this error for many different symbols and it says that they are already defined in func.obj

func.obj is a self contained file that does define these vars, but isn't used or call be the ones that the error is generated from.

So basically I have func.cpp that defines x then I have func1.cpp and it defines x. These are local to their files why would I get this error?

Thanks for the help

Re: LNK2005

Ravi Bhavnani14-Oct-03 11:57

Ravi Bhavnani

14-Oct-03 11:57

Because they're global in scope, the linker detects the duplicate symbol "x".

/ravi

Let's put "civil" back in "civilization"
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Re: LNK2005

skaanji14-Oct-03 12:02

skaanji

14-Oct-03 12:02

jimNLX wrote:
These are local to their files

but linker puts these files together

Re: LNK2005

Jonas Larsson14-Oct-03 20:39

Jonas Larsson

14-Oct-03 20:39

Make them static to force internal linkage.

eg:

-- func.cpp --

static int x; // internal linkage, global to func.cpp only

-- func1.cpp --

static int x; // internal linkage, global to func1.cpp only

“Our solar system is Jupiter and a bunch of junk” - Charley Lineweaver 2002

dtmf decoding

Member 55624714-Oct-03 10:42

Member 556247

14-Oct-03 10:42

&Hi,
How can i decode dtmf signals from telephone line? TAPI doesn't meet my requirements, there're circuits that decodes dtmf signals but i want to implement it on PC with software.

Re: dtmf decoding

Michael P Butler14-Oct-03 22:50

Michael P Butler

14-Oct-03 22:50

TAPI is the easiest way of doing it in Windows. Is there a good reason for not using it. (Apart from poor TSPI support for your telephony device)

This old Slashdot article discussed Telephony and Linux there may be some useful links[^]

Michael

'Logic, my dear Zoe, merely enables one to be wrong with authority.' - The Doctor: The Wheel in Space

VC6 compilation problem in oleidl.h

Kuniva14-Oct-03 10:31

Kuniva

14-Oct-03 10:31

I recently reinstalled windows and Visual Studio 6. I almost forgot how fiddly it is to install all the SDK updates and all that. Now i finally managed to get it all i think but now when i try to compile any of my projects i get the following error:

c:\program files\microsoft visual studio\vc98\include\oleidl.h(5059) : fatal error C1021: invalid preprocessor command 'end'

Does anyone know how to fix this Frown | :(

Btw, the SDK update program installed the Windows 2003 server SDK and i'm running Windows 2000 professional (even though i don't think this has anything to do with it cause the include file is not in the updated SDK directory).

Kuniva
--------------------------------------------

Re: VC6 compilation problem in oleidl.h

Chris Richardson14-Oct-03 11:10

Chris Richardson

14-Oct-03 11:10

You can probably just open up oleidl.h and replace #end with #endif, like maybe oleidl.h got corrupted somehow. Or if that solution worries you, just reinstall VC6 again.

Chris Richardson

JAXB for C++?

Ravi Bhavnani14-Oct-03 9:57

Ravi Bhavnani

14-Oct-03 9:57

Anyone know of a JAXB package that spits out C++? I'm looking for an alternative to manual development of C++ classes from an XML schema.

I've found one on SourceForge but it doesn't seem to be mature. I was wondering if anyone knew of an Apache or IBM/AlphaWorks C++ implementation.

Thanks!

/ravi

Let's put "civil" back in "civilization"
Home | Articles | Freeware | Music
ravib@ravib.com

[DDraw] Surface creating problem

furbyhater14-Oct-03 9:36

furbyhater

14-Oct-03 9:36

Hi, this is my first post on the forum, my name's Florian and I'm from Switzerland (where they make the cheese Wink | ;)

Right now I'm beginning DDraw with c++ (where I'm still quite a beginner too), and I have started writing a DDraw class, a wrapper of a sort, to facilitate casual operations. One of the member functions is a function wich takes a LPDIRECTDRAWSURFACE7 as a parameter and should create a offscreen surface & point to it with the given LPDIRECTDRAWSURFACE7. But somehow it doesn't work, because when I check the pointer after having used the function, he's always invalid.
Here's the code:

<br />
// bool bKey checks for color-keying, iMemFlags controls memory<br />
// allocation (system/video memory)<br />
<br />
ENUM_RESULT CDDraw::CreateOffscreen(int iWidth, int iHeight, bool bKey, LPDIRECTDRAWSURFACE7 lpSurface, int iMemFlags)<br />
{<br />
	// clear ddsd and set size<br />
	memset(&itsDdsd,0,sizeof(itsDdsd) );<br />
	itsDdsd.dwSize = sizeof(itsDdsd);<br />
<br />
	// color-keyed surface or not<br />
	if(!bKey)<br />
		itsDdsd.dwFlags =  DDSD_CAPS | DDSD_WIDTH | DDSD_HEIGHT;<br />
<br />
	else<br />
	{<br />
		itsDdsd.dwFlags =  DDSD_CAPS | DDSD_WIDTH | DDSD_HEIGHT | DDSD_CKSRCBLT;<br />
<br />
		// set the defined color key<br />
		itsDdsd.ddckCKSrcBlt.dwColorSpaceLowValue  = itsTransColor;<br />
		itsDdsd.ddckCKSrcBlt.dwColorSpaceHighValue = itsTransColor;<br />
	}<br />
<br />
	itsDdsd.dwWidth		= iWidth;<br />
	itsDdsd.dwHeight	= iHeight;<br />
<br />
	itsDdsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN | iMemFlags;<br />
<br />
	// destroy previous surface, if valid<br />
	if(lpSurface)<br />
	{<br />
		lpSurface->Release();<br />
		lpSurface = NULL;<br />
	}<br />
<br />
        // itsLpDD points to a valid DD object<br />
	if(FAILED(itsLpDD->CreateSurface(&itsDdsd, &lpSurface, NULL) ) )<br />
	{<br />
		// error<br />
		return(VID_ERR_CREATEOFFSCREEN);<br />
	}<br />
<br />
	return(OK);<br />
}<br />

All the "its*" variables are class variables (of CDDraw), and I try to create the offscreen surface in another class, CMain, wich contains an instance of CDDraw ("itsVideo"), and a LP to a DD surface, "itsSprite". What I try to do looks like this:

<br />
// Set the color key<br />
  itsVideo.SetColorKey(255,0,255);<br />
<br />
  // Create the sprite surface<br />
  if ( (itsResult = itsVideo.CreateOffscreen( <br />
                             64,64,true,itsLpSprite) ) != OK)<br />
  { <br />
	// error<br />
    itsError.ShowMessage(itsWin.GetHwnd(), itsResult);<br />
  }<br />
<br />
  // check if valid surface has been created<br />
  if(!itsLpSprite)<br />
  { <br />
	// error<br />
    itsError.ShowMessage(itsWin.GetHwnd(), itsResult);<br />
  }<br />

And each time, I get an invalid surface...
Any advice/criticism (I'm sure there's alot to critic Wink | ;)

is welcome...

convert string to double without losing precision

godzooky14-Oct-03 9:18

godzooky

14-Oct-03 9:18

i'm trying to convert a string to a double without losing precision. for example, let's say you a string "0.070" and i want it to convert to double. so, i pass it into atof() and i get a double with a value of 0.069999999. how can i get the double to be 0.070? i tried to round the result of atof() to the number of decimal places, but that didn't help. anyone have any ideas?

thanks.

Re: convert string to double without losing precision

Steve S14-Oct-03 9:24

Steve S

14-Oct-03 9:24

Some numbers just won't convert, it's to do with representing them in binary rather than decimal. That's why they're described as 'floating' point numbers, or double precision f.p. numbers. Doubles aren't any more precise, but they can accomodate a larger working range.

If you can handle a fixed number of decimal places, you might want to use large integers instead (__int64) with a fixed divisor, like 1000, but this obviously depends on what range you're dealing with. The OLE CURRENCY type does something along these lines.

Steve S

new class non mfc

thes3cr3t114-Oct-03 8:41

thes3cr3t1

14-Oct-03 8:41

hello, i have writen a winsock aplication using visual c++. i have wrote a new non mfc class to handle a recv thread in my program. the problem is i need to access some of the varibles from my original mfc class,the varible i need to write to is a static text CString.
the varible was declared with the class wizard wich aut:-Domaticaly assighned a varible to the static text id.

is there a way i can access this varible from my new non mfc class,or would i have to declare the CString as global?
if so how would i go about this?

thankyou in advance

chris Big Grin | :-D

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