C / C++ / MFC Discussion Boards

Re: Replacing chars in CString (hex)

User 665821-Sep-02 4:33

User 6658

21-Sep-02 4:33

thanks...how many numbers may follow after \x?

I will write my own parsing routine then

modified 12-Sep-18 21:01pm.

Re: Replacing chars in CString (hex)

Pavel Klocek21-Sep-02 4:44

Pavel Klocek

21-Sep-02 4:44

Two. I'm not sure how's with it in UNICODE strings, but if I remeber it good, it's done using two following \x with two digits.

Pavel
Sonork 100.15206

Re: Replacing chars in CString (hex)

User 665821-Sep-02 5:29

User 6658

21-Sep-02 5:29

Currently I'm writing a parser, but I have one problem:

if(d1 != -1 && d2 != -1)
{
	numbers.Format("%i%i",d1,d2);
	replacechar.Format("\\x%i%i",d1,d2);
				
	CString digits = string.Mid(findx+2,2);
	int iDigits = atoi(digits);
	newchar.Format("%x",iDigits);
	
        string.Replace(replacechar, newchar);
}

replacechar is \x12, this is correct.
But now I need to convert it to hexadecimal:
iDigits is 12, this is correct as well.
But newchar.Format("%x",iDigits); doesn't convert it correct into hexadecimal, since I don't get any answer from the server.

modified 12-Sep-18 21:01pm.

Re: Replacing chars in CString (hex)

Pavel Klocek21-Sep-02 5:47

Pavel Klocek

21-Sep-02 5:47

You are treating the hex number like a decimal one in atoi.
You need to convert it to decimal instead - then you get the needed character code.

Pavel
Sonork 100.15206

Re: Replacing chars in CString (hex)

User 665821-Sep-02 5:51

User 6658

21-Sep-02 5:51

Could you tell me how to do it? I've never done it before

thanks

modified 12-Sep-18 21:01pm.

Re: Replacing chars in CString (hex)

Pavel Klocek21-Sep-02 6:02

Pavel Klocek

21-Sep-02 6:02

int res;
sscanf("12","%x",&res);

Pavel
Sonork 100.15206

Re: Replacing chars in CString (hex)

User 665821-Sep-02 6:06

User 6658

21-Sep-02 6:06

well ok, I have converted it to my needs:

<br />
int res;<br />
sscanf(digits,"%x",&res); // digits is a char*<br />

Where do I put this line in my sourcecode and what shall I do with the result "res"? Frown | :(

modified 12-Sep-18 21:01pm.

Re: Replacing chars in CString (hex)

Pavel Klocek21-Sep-02 6:13

Pavel Klocek

21-Sep-02 6:13

str.Replace(replacedstring,CString(TCHAR(res));

Pavel
Sonork 100.15206

Thank you very much

User 665821-Sep-02 6:15

User 6658

21-Sep-02 6:15

Yippie! Now my parster works perfectly.

HUGE thanks! Rose | [Rose]

modified 12-Sep-18 21:01pm.

Re: Thank you very much

Pavel Klocek21-Sep-02 6:19

Pavel Klocek

21-Sep-02 6:19

My pleasure. Killing time during some boring backup and install job at CP Smile | :)

Pavel
Sonork 100.15206

Re: Replacing chars in CString (hex)

Michael Dunn21-Sep-02 5:53

Michael Dunn

21-Sep-02 5:53

Gregor S. wrote:
string.Replace("\\x", "\x");

The problem is that "\x" by itself in code is illegal since it is meaningless. You'll need to use Find("\\x") to get the location of a "\x" sequence, then parse the following characters (I think it's 2 chars max, check MSDN to be sure), then replace the whole lot with one byte. So the four byte sequence "\\x12" would become one 0x12 byte.

--Mike--
Just released - RightClick-Encrypt v1.4 - Adds fast & easy file encryption to Explorer
My really out-of-date homepage
Sonork-100.19012 Acid_Helm

Window background

suresh_sathya21-Sep-02 3:16

suresh_sathya

21-Sep-02 3:16

For WNDCLASS STRUCTURE if i want my window to have blue color.what should i do.
Can i use colorref to pass value to getstock object.

wndclass.hbrbackground=Getstockobject()

Re: Window background

Dominik Reichl21-Sep-02 4:26

Dominik Reichl

21-Sep-02 4:26

If you want a blue background use this:

wndclass.hbrBackground = RGB(0,0,255);

-Dominik

Socket connection via PROXY server

Chintan21-Sep-02 3:13

Chintan

21-Sep-02 3:13

Sir, I am in a big problem. I have made chat application using SOCKET. Now what is the situation is my application runs well when both the side have direct IP address. But if one of the side is running under PROXY server then connection is not established. So help me to make these type of connection.

C.R.Naik

Re: Socket connection via PROXY server

Joaquín M López Muñoz21-Sep-02 8:31

Joaquín M López Muñoz

21-Sep-02 8:31

Maybe you can take advantage of a technique called HTTP tunneling. Alex Turc describes it in his article HTTP Tunneling[^].

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

shared memory and MFC

nss21-Sep-02 2:37

nss

21-Sep-02 2:37

I found two CP classes for memory mapping but no description or background. Basicallly I have a VC client and a VB COM dll. The dll will be writing to shared memory and the VC client should read it instantly. What informs the process that the memory is ready for reading? There wont be any atual file on disk or anything. I just want to send an integer over from the dll tothe client. I tried sendmessage but it didnt work for some reason. So I'd appreciate it if you can point me to some links where they do what I want.....

Re: shared memory and MFC

Pavel Klocek21-Sep-02 2:47

Pavel Klocek

21-Sep-02 2:47

Shared memory is a memory, that can be mapped to many processes adress space, thats all. Synchronization between processes using it is in your hands.

nss wrote:
I just want to send an integer over from the dll tothe client
That's really not optimal to use shared memory to do it. If you can't use sendmessage for it, try to send an COM event from your COM object.

Pavel
Sonork 100.15206

Re: shared memory and MFC

Joaquín M López Muñoz21-Sep-02 8:25

Joaquín M López Muñoz

21-Sep-02 8:25

You can use named events (see CreateEvent): When data is written the DLL can just set it and all the app has to do is WaitForSIngleBoject for the event.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Header file needed

Ghasrfakhri20-Sep-02 21:16

Ghasrfakhri

20-Sep-02 21:16

Hello everybody
I want to use Internet Authentication Service But AuthIf.h header file is not in my VS 6 package,where can I find it & its libery files?
tnX alot

Iman Ghasrfakhri

Re: Header file needed

Michael Dunn20-Sep-02 21:25

Michael Dunn

20-Sep-02 21:25

See the VC Forum FAQ, it lists where to get the Platform SDK.

--Mike--
Just released - RightClick-Encrypt v1.4 - Adds fast & easy file encryption to Explorer
My really out-of-date homepage
Sonork-100.19012 Acid_Helm

Incorporating 16-bit, 32-bit, and 64-bit ASM in C++ :: ASM

valikac20-Sep-02 18:59

valikac

20-Sep-02 18:59

Hi.

I am a C++ programmer.

I began learning 16-bit ASM and practice 16-bit ASM programming under DOS and MASM 6.x three weeks ago. I am very impressed with ASM and the control and simplicity ASM brings to programming. 16-bit ASM is so simple. Programmers have the most flexibility in terms of program design. I enjoy ASM programming and will definitely continue learning and practicing 16-bit ASM.

I have some basic, but essential, questions on implementing 16-bit, 32-bit, and 64-bit assembly in C++ programs.

1) Under what circumstances in additional to device drivers development do programmers use 16-bit and 32-bit ASM? I am most interested in 16-bit ASM when using ASM only.

2) Under what circumstances do C++ programmers incorporate 16-bit and/or 32-bit ASM in C++ programs? Please be as specific as possible. For example, under what conditions do 16-bit and 32-bit ASM out-perform C++? I am most interested in the Windows environment when using C++ and ASM.

Is it possible to apply 16-bit ASM in C++ Windows programs? Again, C++ does all the messaging. I want to incorporate ASM it is called for.

Thanks,
Kuphryn

Re: Incorporating 16-bit, 32-bit, and 64-bit ASM in C++ :: ASM

Mike Nordell21-Sep-02 1:34

Mike Nordell

21-Sep-02 1:34

kuphryn wrote:
Under what circumstances in additional to device drivers development do programmers use 16-bit and 32-bit ASM?

IA16 assembler is used mostly for writing bootsector code.

IA32 assembler is used whenever the compiler can't provide the speed, or instructions, needed to perform a given task at a given speed. F.ex. compilers usually don't (never?) generate e.g. MMX code for plain C/C++.

Is it possible to apply 16-bit ASM in C++ Windows programs?

Yes. Ever version of windows up to (not including) Windows 4.0 (Windows 95) was completely 16-bit. Win9x uses a lot of 16-bit code internally, and is actually more of a 32-bit shell on top of a 16-bit OS than anything else. For Windows version based on the NT kernel the only trace of 16-bit code you'll find is AFAIK the boot loader.

Tweaking your question a bit to read "Is it even remotely useful to apply 16-bit ASM ...", the answer becomes: No. Why on earth would anyone want to punish themselves with that horror?

Re: Incorporating 16-bit, 32-bit, and 64-bit ASM in C++ :: ASM

valikac21-Sep-02 6:27

valikac

21-Sep-02 6:27

Okay.

You made a very good point about how recent versions of Windows make little use of 16-bit ASM. I believe 16-bit ASM is good for use in pure DOS and to communicate directly with hardware in pure DOS mode. In that case, how does 16-bit ASM come into effect? Can you use 32-bit or 64-bit ASM to communicate with hardware?

Kuphryn

Re: Incorporating 16-bit, 32-bit, and 64-bit ASM in C++ :: ASM

Mike Nordell21-Sep-02 11:03

Mike Nordell

21-Sep-02 11:03

kuphryn wrote:
Can you use 32-bit or 64-bit ASM to communicate with hardware?

Since you can express anything in assembler that you also can do with another language (usually with much more work in assembler though), and any Win32 hardware device driver is written in (combinations of) C/C++/assembler, obviously you can communicate with hardware using assembler.

For 64-bit I feel I have to ask: Do you really know anyone even having seen a live Itanium Windows system, much less owns one?

Xtras for Director and XtraBuilder

nencini20-Sep-02 17:25

nencini

20-Sep-02 17:25

I'm learning to buid Xtras for Director
with XtraBuilder (that's a very good
tool for beginners) and Visual C++,
before starting studying XDK.

Simply I ask if somebody know if there
is somewhat similar to XtraBuilder for
Mac and Codewarrior. - Many thanks.

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