Re: User breakpoint when trying to free memory. - C / C++ / MFC Discussion Boards

Mike Nordell24-Oct-02 4:06

24-Oct-02 4:06

Daniel Desormeaux wrote:
What is the simplest way to accomplish this, considering these requirements:

a) My DLL must be as small as possible

Then you simply have no choice: You must create your dialog on-the-fly to no have a RESOURCE (.rsrc) section in the DLL. I have done this myself for a simple text-input dialog usable from anywhere (as .lib or in a DLL or...) without messing up with resource ID's and such. Perhaps something similar could be of use for you?

Can I, however, have a DLL exporting one function which, when called, displays this dialog box...and can still be called both from the EXEs and the ATL-based ActiveX?

Yes. To be 100% sure (well, assuming resources are available) that it always works you'd however need to do something like what I've outlined.

I hate this, this should be simple...

I agree. However, it is Micros~1 created code we are dealing with...

Re: Raw Win32 API UI in a DLL...?

dandy7224-Oct-02 8:56

dandy72

24-Oct-02 8:56

> create your dialog on-the-fly to no have a RESOURCE (.rsrc) section

Ok, overkill. I need it to be as small as possible, but not that small. I'm still allowed to compile an .RC file. Smile | :)

Using Paul's excellent post (and much more to-the-point than mine) Smile | :)

as a starting point, I managed to put this together without duplicating code and without any separate DLL. I do have to include the .RC in the EXEs and ActiveX projects, but I'm happy with this solution.

List/Array - finding items

User 665823-Oct-02 10:19

User 6658

23-Oct-02 10:19

Hi
I'm programming a tool that collects game server IPs and logs them into a file. The logging is fine, however there are a lot servers with the same IP, that's why I want servers already logged not to be logged into the file again.

What is the best approach? Should I use an array, a linked list or something else where I should store all IPs in form of a string? And how can I search for strings inside an array/linked list etc.? Furthermore the technique should be very fast.
/edit: I should mention that I can't use MFC, only plain Win32 API

If someone could give me a hint or a link I would be very grateful Smile | :)

regards
Greg

modified 12-Sep-18 21:01pm.

Re: List/Array - finding items

Dave Bryant23-Oct-02 10:27

Dave Bryant

23-Oct-02 10:27

Use an STL set - it doesn't allow duplicates, and has log(n) time for searching.

Dave

Re: List/Array - finding items

Daniel Turini23-Oct-02 10:35

Daniel Turini

23-Oct-02 10:35

Besides Dave's sugestion, store the IPs as int, since each IP is formed by 4 bytes (numbers from 0 to 255).

Q261186 - Computer Randomly Plays Classical Music

Re: List/Array - finding items

User 665823-Oct-02 13:14

User 6658

23-Oct-02 13:14

Thanks!

I will give it a try

modified 12-Sep-18 21:01pm.

User breakpoint when trying to free memory.

Anonymous23-Oct-02 9:50

Anonymous

23-Oct-02 9:50

My function looks like this:

void ReplaceString(char *szSourceString, const char *szToReplace, const char *szReplaceWith)
{
	char *szReplacePos = strstr(szSourceString, szToReplace);
	char *szFirstPart = new char[strlen(szSourceString)];

	while (szReplacePos != NULL)
	{
		memset(szFirstPart, 0, strlen(szSourceString));
		strncpy(szFirstPart, szSourceString, szReplacePos-szSourceString);
		strcat(szFirstPart, szReplaceWith);
		strcat(szFirstPart, &szReplacePos[strlen(szToReplace)]);
		strcpy(szSourceString, szFirstPart);
		szReplacePos = strstr(szSourceString, szToReplace);
	}

	delete[] szFirstPart;
}

The szFirstPart pointer never changes but i still get a user breakpoint message. I have't free'd it before in the while loop so i don't understand it, any ideas?

THanks

Re: User breakpoint when trying to free memory.

Daniel Turini23-Oct-02 9:57

Daniel Turini

23-Oct-02 9:57

A buffer overrun...

change to this:

char *szFirstPart = new char[strlen(szSourceString) + 1];

Q261186 - Computer Randomly Plays Classical Music

Re: User breakpoint when trying to free memory.

Stephane Rodriguez.23-Oct-02 10:14

Stephane Rodriguez.

23-Oct-02 10:14

Anonymous wrote:
char *szFirstPart = new char[strlen(szSourceString)];

char *szFirstPart = new char[strlen(szSourceString)+1]; // + 1 for the EOL char

Then take that char into account everywhere, for instance :
memset(szFirstPart, 0, strlen(szSourceString));
becomes
memset(szFirstPart, 0, strlen(szSourceString)+1);

How low can you go ?
(MS rant)

MFC doc/view issue

will138323-Oct-02 9:38

will1383

23-Oct-02 9:38

I all,

I'm attempting to write an application using the doc/view arch. and I'm not sure how to do the following:

I want to have multiple views of a single document (read, different views using different dialogs and the like). A similar way to look at it would be the windows explorer. 2 very different views of the same data. That is in essence what I want to do, but each view has its own dialog box and set of functions associated with it. They are implemented as seperate dlls since they are used in many other applications.

Can I do this by setting up the splitters correctly?
What do I have to do to display these other dialog boxes within that particular view?

Any suggestions are greatly appreciated, even if it is another way of approaching the manner. I am using toolbars and rebars extensively and thought the doc/view approach would be the way to go.

Thank you in advance. This could be a complicated matter (it is to me!)

Dan

Re: MFC doc/view issue

valikac23-Oct-02 18:08

valikac

23-Oct-02 18:08

Yes, it is possible to implement multiple views of a single document and it can be done with a splitter frame.

The simplest solution for multiple concurrent dialog boxes is modeless style over modal style. Otherwise, consider a propertysheet.

Kuphryn

How to change the background of a CHotkeyCtrl ?

CAE23-Oct-02 9:12

CAE

23-Oct-02 9:12

Hi,

I can override WM_ERASEBKGND and fill the control but it is valid only when the control has not the focus. If it gains focus, the text is drawn with a background system color (COLOR_WINDOW), WM_CTLCOLOR is not called.

Any idea ?

Nicolas

Re: How to change the background of a CHotkeyCtrl ?

Mike Nordell24-Oct-02 4:09

Mike Nordell

24-Oct-02 4:09

Any idea ?

Spy++ ?

html help workshop question

Anonymous23-Oct-02 8:48

Anonymous

23-Oct-02 8:48

I dont know where to post this. My MFC app has a HElp Menu item> i want to launch the tripane help window from this button. My HTMLHELP workshop book tells me how to make a help project so I am assuming that I have the .chm file. Now I need to know how to launch this using the HTMLHelp API.....

Re: html help workshop question

Dominik Reichl23-Oct-02 9:15

Dominik Reichl

23-Oct-02 9:15

You can use the ShellExecute function:

HINSTANCE ShellExecute(
HWND hwnd,
LPCTSTR lpOperation,
LPCTSTR lpFile,
LPCTSTR lpParameters,
LPCTSTR lpDirectory,
INT nShowCmd
);

As operation you specify "open", as file your .chm file.

Big Grin | :-D

-Dominik

How do i replace a specific string inside a char array with another string?

Anonymous23-Oct-02 8:28

Anonymous

23-Oct-02 8:28

thanks

Re: How do i replace a specific string inside a char array with another string?

Mel Feik23-Oct-02 8:36

Mel Feik

23-Oct-02 8:36

try using the remove(), replace(), insert() members of CString

---------------------------------------------

Be good! But if you can't be good, at least be good at it and try not to get any on ya!

-mjf

Re: How do i replace a specific string inside a char array with another string?

Anonymous23-Oct-02 8:39

Anonymous

23-Oct-02 8:39

How do i use them on a char array?

Re: How do i replace a specific string inside a char array with another string?

Mel Feik23-Oct-02 9:01

Mel Feik

23-Oct-02 9:01

You can't directly (not that I'm aware of anyways. However, one way would be to declare a CString and set it to your char array (CString str = charArray;) and them use the CString members mentioned earlier, are you could use the <string.h> functions such as strcat(), strcpy(), etc... Personally I prefer working with the CString as that wrapper class seems more flexible to me (or maybe its just cause I'm used to it). Either way would work fine and of course, you could also just use pointers and remove/replace in your char array as you like.

---------------------------------------------

Be good! But if you can't be good, at least be good at it and try not to get any on ya!

-mjf

Splash screen

MFC is the Best23-Oct-02 8:01

MFC is the Best

23-Oct-02 8:01

hello!

i have a splash screen (greeting screen) in my mfc-programm. how can i change the time?(i would like to see the picture longer.)

thanks

MFC

Re: Splash screen

jmkhael23-Oct-02 8:03

jmkhael

23-Oct-02 8:03

search in your code for SetTimer

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Re: Splash screen

MFC is the Best23-Oct-02 8:08

MFC is the Best

23-Oct-02 8:08

thank you very much

linking libs in...

l a u r e n23-Oct-02 7:39

l a u r e n

23-Oct-02 7:39

hello

i use static linking when i build my app but i had a tester tell me that on an old w95 machine the app couldnt load cos it was missing ws2_32.dll ... now i thought first off that static linking would put that in there but apparently not

can i distribute the ws2_32.dll as part of the installer without stuffing up old machines like that one?

thanks

"even if my world is weird it's my world"
biz stuff about me

Re: linking libs in...

Stephane Rodriguez.23-Oct-02 7:43

Stephane Rodriguez.

23-Oct-02 7:43

MS Redistribution package for W95[^]. (not needed on W98).

How low can you go ?
(MS rant)

Re: linking libs in...

l a u r e n23-Oct-02 7:51

l a u r e n

23-Oct-02 7:51

thanks stephane
Smile | :)

"even if my world is weird it's my world"
biz stuff about me

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