C / C++ / MFC

2-Oct-06 19:07

UINT ListFiles(LPVOID pParam)
{	
	CFileFind tempFind;
	CString temp(_T("C:\\mysettings\\*.*"));
	AfxMessageBox("before");
	BOOL IsFinded=tempFind.FindFile(temp); 
	AfxMessageBox("after");

	return 0;
}
void CCSetDlgDlg::OnButtonList() 
{
	AfxBeginThread(ListFiles,this);
}

My code is very simple.Everything is ok under debug configuration.but when I changed the configuration into static release.something happened.I found that 'before' message box showed,but never the 'after' message box.It seemed that the code was blocked at 'FindFile'.
How could this happen? I think my project settings may be wrong somewhere.(MFC6/VC6)

I have done a lot to figure out the problem but no way. My project is a little large and would be finished soon.
Could anybody give me a help please?

prasad_som2-Oct-06 19:17

prasad_som

2-Oct-06 19:17

Just quick thought. Remove message boxes, and create log instead.
Probably, your code is working correct.

Prasad
Notifier using ATL | Operator new[],delete[][^]

31415926532-Oct-06 19:22

2-Oct-06 19:22

Thank you Prasad.
Yes, I tried. I tried log. And I also removed the log before 'FindFile'. But still,what ever the code right behind FindFile,It would never be there.

Frown | :(

prasad_som2-Oct-06 19:41

prasad_som

2-Oct-06 19:41

Hmmm, code doesn't seem to have problem.
see How to : debug release build[^] from MSDN. And debug the code.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Stephen Hewitt2-Oct-06 19:38

Stephen Hewitt

2-Oct-06 19:38

You need to find out exactly where the program is hanging. To this end I’d alter the project settings for the release configuration so it contains debug information then run the release build in the debugger and break into it when it’s hung and check out the call stack. The enable debug information in a release build follow these steps (MSVC6):
- Select “Project->Settings”
- Select “Release” configuration.
- Select “C/C++” tab.
- In the “Category” combo select “General”.
- In the “Debug info” combo select “Program Database”. Note that in a debug build you’d select “Program Database for Edit and Continue”.
- Select the “Link” tab.
- Select “Debug” in the “Category” combo.
- Tick/select “Debug info”, “Microsoft format” & “Separate types” (same as in debug builds).

This is the first change I make when setting up a new project. If I made the IDE these would be the default settings.

PS:
PI = 3.141592653^58979323846......

The '^' shows where you name stops. Normal convention is to round up if the digit after is 5 or above, thus I feel your name should be:
3.141592654

Steve

31415926532-Oct-06 20:12

2-Oct-06 20:12

Thanks for your reply.
Infact I have done as what you have said already.
And If I configured as you had said,everything is fine either.
since I can't figure out the problem I post a help here.

PS:3.141592653 is my name.

but my signature is "3.141592653..... Never Stop!" Smile | :)

3.141592653..... Never Stop!

Stephen Hewitt2-Oct-06 20:17

Stephen Hewitt

2-Oct-06 20:17

Can you post the call stack to the hang?

PS: I'll just call you "three and a bit".

Steve

31415926532-Oct-06 21:01

2-Oct-06 21:01

call stack?
I found that my program was blocked here:

->LPTSTR pstrBack = _tcsrchr(pstrRoot, '\\');
LPTSTR pstrFront = _tcsrchr(pstrRoot, '/');

in BOOL CFileFind::FindFile(LPCTSTR pstrName /* = NULL */,
DWORD dwUnused /* = 0 */)

pstrRoot is correct Frown | :(

S Douglas3-Oct-06 0:02

S Douglas

3-Oct-06 0:02

Stephen Hewitt wrote:
PS:
PI = 3.141592653^58979323846......

The '^' shows where you name stops. Normal convention is to round up if the digit after is 5 or above, thus I feel your name should be:
3.141592654

Now that’s taking being pedantic to whole new levels. Laugh | :laugh:

I'd love to help, but unfortunatley I have prior commitments monitoring the length of my grass. :Andrew Bleakley:

Stephen Hewitt3-Oct-06 13:41

Stephen Hewitt

3-Oct-06 13:41

My intent was to be a smart ass.

Steve

Rudolf Jan3-Oct-06 1:08

Rudolf Jan

3-Oct-06 1:08

I do not think the debugger or call stack or whatever will get you out of this trouble. Indeed, nothing seems wrong with this code. It has noting to do with your build settings, normally erros with that result in huge numers of error messages.

I think this has to do with corrupted memory. It may be caused by any part of your application. What I would do in this circumstances is to isolate parts of the application by switching off code (cemment out). Then try to find out when te problem disappears. Italso ma be useful to check carfully for possibly corrupted memory. Did you intialize all pointers? Did you maybe release meory (using delete or free), but try to accessthis memory from other places? Is it possible that you exceed any array bounds? It may take a lot of time to debug.

I wish you good luck in this bug hunting. It happened to me two or three times in my career, but I always found a reason for tis behaviour.

strip characters

thathvamsi2-Oct-06 17:52

2-Oct-06 17:52

Hi all,
This is a basic C programming question.
I need to save group of data in to a file with the datas separated by commas.
But, if the datas have commas within themselves, I need to strip that comma and save the data as one single word without commas. But each data item needs to be separated by commas.
Can anyone tell me how to escape or strip the comma if it is within the datafield.

eg., 1, Steve,Dave, 25yrs, California
I want to strip or ignore the comma that is between Steve and Dave and store the data as
1, SteveDave, 25yrs, California

I know this is a basic question. But i need help in this guys.
Many thanks in advance.

Link20062-Oct-06 18:07

2-Oct-06 18:07

thathvamsi wrote:
eg., 1, Steve,Dave, 25yrs, California
I want to strip or ignore the comma that is between Steve and Dave and store the data as
1, SteveDave, 25yrs, California

Easy, just read it character by character in a simple for loop, if it's comma, ignore it.

Wink | ;)

thathvamsi2-Oct-06 18:20

2-Oct-06 18:20

how to ignore it?
how can i print the data without comma?

Link20062-Oct-06 18:26

2-Oct-06 18:26

Wait I re-read your question, I misunderstood. I got your question this time.

thathvamsi wrote:
eg., 1, Steve,Dave, 25yrs, California
I want to strip or ignore the comma that is between Steve and Dave and store the data as
1, SteveDave, 25yrs, California

You can see if the next character is space, if not, then it's in the datafield.

thathvamsi2-Oct-06 18:30

2-Oct-06 18:30

I dont understand. sorry.
I have a group of data fields. each data field is separated by comma but the data itself shouldnt have a comma in it. ie., for eg., St,eve, David, Ross

I want to print just Steve, David, Ross by ignoring only that comma that is between 't' and 'e' . i need the other commas to separate the datafields.
how do i do it?
if u can showe some code snippet, thats great.

Link20062-Oct-06 18:56

2-Oct-06 18:56

thathvamsi wrote:
I have a group of data fields. each data field is separated by comma but the data itself shouldnt have a comma in it. ie., for eg., St,eve, David, Ross

Okay, suppose you have a txt file called data.txt, where the content: St,eve, David

The following code will print Steve David

modify the code a bit yourself to add comma in the end result. Hope that helps.

<br />
#include < stdio.h ><br />
<br />
int main(int argc, char *argv[])<br />
{<br />
        FILE *fp = NULL;<br />
	char buffer[20] = { 0 };<br />
	char ch = 0;<br />
	int i = 0;<br />
<br />
	fp = fopen("data.txt", "r");<br />
	<br />
	for (i = 0; (i < 20) && ((ch = getc(fp)) != EOF) && (ch != '\n'); i++)<br />
	{<br />
		if (ch != ',')<br />
			buffer[i] = (char) ch;<br />
		else<br />
			i--;<br />
	}<br />
<br />
	buffer[i] = '\0';<br />
	printf( "%s\n", buffer);<br />
<br />
	fclose(fp);<br />
<br />
        return 0;<br />
<br />
}<br />

thathvamsi2-Oct-06 20:31

2-Oct-06 20:31

thanks.
how do i do it if the contents are stored in an array of counted byte strings instead of a file.

eg., row[0]=Steve
row[1] =david
row[3] = ross

David Crow3-Oct-06 5:32

David Crow

3-Oct-06 5:32

The requirement was to save to a file, not read from it.

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Hamid_RT2-Oct-06 18:08

Hamid_RT

2-Oct-06 18:08

Hope I understood your question
if you want to delete comma of you can use CString::Find for get commas and then remove their of your string with CString::Delete.

WhiteSky

Link20062-Oct-06 18:20

2-Oct-06 18:20

WhiteSky wrote:
Hope I understood your question

I think he is asking how to parse a file that contains comma and want to ignore them when parsing.

thathvamsi2-Oct-06 18:20