C / C++ / MFC Discussion Boards

Chris Richardson13-Jan-03 11:48

13-Jan-03 11:48

I just ran some tests, here are the results:

My Machine:
2GHz Pentium 4
512 MB Ram

Data: 180MB char array.
Test: Bitwise NOT the contents of the array 100 times, alternating between the assembly version and the C++ version.

Debug build:
C++ Version:
445 ms average.

Assembler Version:
285 ms average.

Release Build:
C++ Version:
268 ms average.

Assembler Version:
284 ms average.

I think the most significant optimization (from your original sample) is copying 32 bits at a time, rather than 8 bits at a time, but surely the alignment helps.

It also appears that the optimizer is definately your friend!

Chris Richardson

Programmers find all sorts of ingenious ways to screw ourselves over. - Tim Smith

Re: Any assembly geeks out there?

Tim Smith13-Jan-03 12:04

Tim Smith

13-Jan-03 12:04

It also appears that the optimizer is definately your friend!

About a month ago, someone posted a speed fix for a strxxx routine. I thought the enhancement was cool, but really didn't think it would be better than the MASM strxxx routine in CRTL.

I was wrong. Smile | :)

My bet is that many of those old strxxx MASM routines haven't been reviewed for performance on newer machines. A lot has changed.

Tim Smith

I'm going to patent thought. I have yet to see any prior art.

Re: Any assembly geeks out there?

Chris Richardson13-Jan-03 12:13

Chris Richardson

13-Jan-03 12:13

Tim Smith wrote:
My bet is that many of those old strxxx MASM routines haven't been reviewed for performance on newer machines. A lot has changed.

Imagine how much has changed even in just the last 4.5 years since VC6 was first released. I would not be surprised at all to find that those old asm routines need a bit of review.

Chris Richardson

Programmers find all sorts of ingenious ways to screw ourselves over. - Tim Smith

Re: Any assembly geeks out there?

nde_plume13-Jan-03 11:48

nde_plume

13-Jan-03 11:48

I'm not an assembly geek, but did you consider
just assembly stepping into memcpy, copying their
code and modifying to to do whatever particular
operation you need? It should just involve replacing
a MOV instruction with an XOR or OR instruction.

Oh, on other thing, if you are going for fast
performance, I believe the special MMX instructions
of the Pentium processor can do this sort of stuff
really fast (obviously you'll have to check processor
version and provide an alternative for processors
without those instructions.)

Window position

electronicman_x13-Jan-03 8:18

electronicman_x

13-Jan-03 8:18

I'm currently working on an MDI application that has dockable toolbars and a child window (view). I want to make a menu item that allows me to return the windows & toolbars to their initial position. I am able to place the toolbars successfully via docktoolbar(), but i cannot recall how to handle the child window. I would like to capture the window's position during/just after it's creation, and upon the appropriate menu call, restore that position. I've looked into Get/Set-WindowPlacement() but i'm very unclear on it's usage. Any advice would be appreciated, code is especially helpful.

I was also wondering how i can call the built in functionality from the window->tile menu command that tiles your child windows (from within my code at runtime).

Thanks

Jeff Rothenberg

Project Engineer
Vector CANtech, Inc.

text formatting question.

Maximilien13-Jan-03 8:06

Maximilien

13-Jan-03 8:06

Good Formating everyone !

I need to set the string length of a float number :

for example, I have this number :
345.22123123, and the length is 4, so the output will be 345.2, no leader zero, or trunc/round at the end, it's only outputing the number; if the lenght is smaller than the representation of the number, I manage this already.

What's the magic formula for this ?

MSDN says :

%[flags] [width] [.precision] [{h | l | I64 | L}]type

But I'm not sure what width or precision to set, since the width is the minimum length, and the precision is what's after the decimal.

Thanks.

Clueless Max.

Forget it, I found it ...

Maximilien13-Jan-03 8:11

Maximilien

13-Jan-03 8:11

there's a g format token that helps ...

Max.

Changing MessageBox button captions.

rghin13-Jan-03 7:23

rghin

13-Jan-03 7:23

I would like to alter the caption displayed on the buttons in a MSVC++ Message box. I've currently got MB_YESNO buttons and would like to have them display Bi lingual text (ie. YES/OUI and NO/NON). Any ideas on how to do this.

Thanks in advance.

Re: Changing MessageBox button captions.

Navin13-Jan-03 7:23

Navin

13-Jan-03 7:23

I believe you'll have to make your own dialog to do that. If you're using MFC, you can just create something in the resource editor with some generic buttons, and derive from CDialog and add a few functions to set the text.

As a note - the system Message Boxes will display their text in the language installed/selected on the machine. That is, on an English system, they show English, and on a French system, they show French, etc. So maybe you don't even need to change them...? Confused | :confused:

Even a broken clock is right twice a day.

Re: Changing MessageBox button captions.

Jim A. Johnson13-Jan-03 7:34

Jim A. Johnson

13-Jan-03 7:34

It's not simple. You actually can't change the captions n a true message box; they are fixed.

However, you can use a class called TcxMessageBox to do this, along with a lot of other message box customizations. It's on CP, somewhere.

Re: Changing MessageBox button captions.

Nish Nishant13-Jan-03 8:46

Nish Nishant

13-Jan-03 8:46

Use a CBT hook to hook the message box. Shog and I do this in our delay message box, but for different reasons from yours.

Nish

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Review by Shog⁹
Click here for review[NW]

Getting Hardware Profile in Win9x

Jim Hewitt13-Jan-03 7:11

Jim Hewitt

13-Jan-03 7:11

Hi all, hope someone can help.
Using GetCurrentHWProfile() to obtain GUID string in simple app. #defining _WIN32_WINNT (0x0400)(and #include "windows.h")which ensures that the program works fine with NT and Win2k, but f() fails on a Win98 machine even though the f() is supposed to work with Win95 OSR2 and upwards.

Can't find any documentation in the MSDN - anybody know of further #defines that are necessary for this to work on a Win9x machine?

Frown | :(

Sonork ID: 100.13715 - 3bananas4

I have detailed files

spawning of process

wavk13-Jan-03 6:54

wavk

13-Jan-03 6:54

Hi,

I want to spawn a process and wait for it to finish. I'm doing this in a seperate thread, so the user can continue working. The problem is that the new process comes popping up in front of the application each time! Now I could spawn the process with _P_DETACH, so the process is invisible, but that way I can't wait for the process to finish. That is important, because when the process finishes, I build a texture of it's output image. Is this possible and if so how?

Thanks in advance,

Wybren van Keulen,
Funny Farm

Re: spawning of process

Navin13-Jan-03 7:25

Navin

13-Jan-03 7:25

Go to MSDN and check out CreateProcess and WaitForSingleObject.

Even a broken clock is right twice a day.

Adding right click menu to CDialogBar

Aaron Schaefer13-Jan-03 6:56

Aaron Schaefer

13-Jan-03 6:56

Hi All,

I've got a CDialogBar derived class which contains a rich edit control, I am using this as a message window for an MDI app. How can I modify the right click menu that is shown? Currently, my options are "Hide" and "Undock" or something like that. I would llike to add a CLear option to the message window.

Thanks,

Aaron

Saving window state of docking window

Aaron Schaefer13-Jan-03 6:46

Aaron Schaefer

13-Jan-03 6:46

Hi All,

I've got a workspace style app (MDI), with a CDialogBar derived window containing a tree control on the left (for navigation, opening views, etc), and a CDialogBar derived window containing an edit control on the bottom (for messages), which sort of looks like the Visual Studio workspace. On exiting the application, I need to save the window position and state of the docking windows. How do I do this?

I guess can get a window rect with GetWindow?? soething or other, but how do I get the docked/undocked state of the window?

Thanks in advance,

Aaron

Re: Saving window state of docking window

Maximilien13-Jan-03 6:56

Maximilien

13-Jan-03 6:56

Have a look at

SetWindowPlacement/GetWindowPlacement for normal windows.

SaveBarState/LoadBarState for CControlbar windows.

Max.

Re: Saving window state of docking window

Aaron Schaefer13-Jan-03 7:38

Aaron Schaefer

13-Jan-03 7:38

Hey Thanks!

That worked pretty good, so far. I found the DOCKTOOL sample searching for that as well, which has helped.

So far, I am able to save the placement of the main frame, and restore the stae of the control bars.

But, what should I use to save/restore the size of the control bars? Ie, when I close the app, the message bar comes up with the correct state, but is not the correct size.

Can I use GetWindowPlacement for the control bars? Or do I need something like GetWindowRect/MoveWindow?

Thanks Again,

Aaron

richedit control--AfxInitRichEdit

ns13-Jan-03 6:28

13-Jan-03 6:28

AfxInitRichEdit();

I put this in the app class in an MFC MDI.

Now I have just a CDialog based app, and if I dont put it in, i dont get anything.....

Where should it go?

Appreciate your help,
ns

Re: richedit control--AfxInitRichEdit

Gary Kirkham13-Jan-03 6:57

Gary Kirkham

13-Jan-03 6:57

The dialog based application still should have a class derived from CWinApp...put the AfxInitRichEdit call in the app's InitInstance function

Gary Kirkham

A working Program is one that has only unobserved bugs

I thought I wanted a career, turns out I just wanted paychecks

thanks!

ns13-Jan-03 7:03

13-Jan-03 7:03

I found the function...many thanks

Appreciate your help,
ns

Wrapping around font in CEdit

ns13-Jan-03 6:03

13-Jan-03 6:03

I have a CEdit with multiline and hScroll and VScroll but the contents arent wrapping automatically . How to get this to happen? Do I have to use a richedit control if I want to wrap contents? Surely there must be a way to wrap stuff around in a plane old CEdit...?

Appreciate your help,
ns

Re: Wrapping around font in CEdit

Chris Meech13-Jan-03 7:10

Chris Meech

13-Jan-03 7:10

Have you tried the styles ES_MULTILINE, and ES_AUTOVSCROLL?

Those two alone should do the trick.

Chris Meech

"what makes CP different is the people and sense of community, things people will only discover if they join up and join in." Christian Graus Nov 14, 2002.

"AAAAAAAAAHHHHHH!!!!! Those leaks are driving me crazy! How does one finds a memory leak in a garbage collected environment ??! Daniel Turini Nov. 2, 2002.

Re: Scrollbar range

AlexO13-Jan-03 5:21

AlexO

13-Jan-03 5:21

Win95?

Re: Scrollbar range

Ted Ferenc13-Jan-03 5:41

Ted Ferenc

13-Jan-03 5:41

This is, I think an M$ feature! it is documened in the MSDN, here is a code snippet of mine from an old prog, in OnVScroll method

   // OnVScroll does not pass in a 32 bit value for nPos<br />
   // the UINT can also be -ve!! So DIY!!<br />
SCROLLINFO		info;<br />
   // Get the real position of the tracker<br />
info.cbSize = sizeof(SCROLLINFO);<br />
info.fMask = SIF_TRACKPOS;	<br />
<br />
GetScrollInfo(SB_VERT, &info);

If I have seen further it is by standing on the shoulders of Giants. - Isaac Newton 1676

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