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Re: How to handle breaks during debugging

prithaa5-Sep-09 20:19

5-Sep-09 20:19

Thanks for your reply

But when I press F5 the code goes further that is the cursor moves ahead but the the action doesnt reflect in the execution like suppose after pressing a right arrow key I want the cursor to move further on the dialog then the cursor doesnt move on the dialog. whereas if I remove the break in the OnkeyDown then cursor moves in the dialog.

I hope the question is clear.

Pritha

Re: How to handle breaks during debugging

Stuart Dootson5-Sep-09 23:36

Stuart Dootson

5-Sep-09 23:36

Well, if I've understood you correctly, that's because the breakpoint keeps on breaking - every time you hit OnKeyDown

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: How to handle breaks during debugging

prithaa6-Sep-09 0:20

prithaa

6-Sep-09 0:20

Hello,

Thanks

What is the meaning of the breakpoint keeps breaking ?

Pritha

Re: How to handle breaks during debugging

Stuart Dootson6-Sep-09 0:57

Stuart Dootson

6-Sep-09 0:57

Every time you reach the OnKeyDown handler, it'll break at the breakpoint.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: How to handle breaks during debugging

prithaa6-Sep-09 1:00

prithaa

6-Sep-09 1:00

Thanks

so I should not be using breaks in OnKeyDown() is it? .It is wrong to use it like that ?

Pritha

Re: How to handle breaks during debugging

Stuart Dootson6-Sep-09 1:03

Stuart Dootson

6-Sep-09 1:03

Well - what's the bug you're trying to find?

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: How to handle breaks during debugging

iraclyKv6-Sep-09 23:50

iraclyKv

6-Sep-09 23:50

Like all console input (keyboard, mouse events, windows focus and caret management) it's better to debug with writing debug messages to some (console or file). We either practice use Beep's.

Re: How to handle breaks during debugging

Iain Clarke, Warrior Programmer6-Sep-09 9:25

Iain Clarke, Warrior Programmer

6-Sep-09 9:25

OK... I see two scenarios you are describing:

1/ With breakpoint.
a) App is running.
b) Focus is in a window.
c) You press f5.
d) This is a key going down, so the CSomeControl::OnKeyDown handler is called.
e) You have a breakpoint there, so it, erm, breaks and goes into the debugger, allowing you to debug you OnKeyDown handler.

This is a good thing.

2/ With no breakpoint.
a) App is running.
b) Focus is in a window.
c) You press f5.
d) This is a key going down, so the CSomeControl::OnKeyDown handler is called.
e) You have no breakpoint there, so the application carries on happily.

This is a good thing.

This may be a language problem (don't apologise for that!), but I can maybe see a 3rd scenario:
1/ With breakpoint.
a) App is running.
b) Focus is in a window.
c) You press some key.
d) This is a key going down, so the CSomeControl::OnKeyDown handler is called.
e) You have a breakpoint there, so it, erm, breaks and goes into the debugger, allowing you to debug you OnKeyDown handler.
f) You press f5 to carry on with the program, and it no longer works

If #3 is true, then I bet you're forgetting to hold down the original key before continuing execution. You application may be thinking "so, when is he releasing that key!? It's been down for a long time...".

Iain.

I have now moved to Sweden for love (awwww).
If you're in Scandinavia and want an MVP on the payroll (or happy with a remote worker), or need cotract work done, give me a job! http://cv.imcsoft.co.uk/[^]

Re: How to handle breaks during debugging

prithaa6-Sep-09 19:11

prithaa

6-Sep-09 19:11

Thank you

I think the scenario is very much possible but then debugging OnKeyDown is pretty much difficult or not possible.

Thanks

Calling Unmanaged Class From DLL

İsmail Durmaz5-Sep-09 5:27

İsmail Durmaz

5-Sep-09 5:27

I want to call any class from unmanaged dll. How can i do?

// c++ side

class __declspec(dllexport) foo{
public:
    foo();
    ~foo();
    void sum(int a, int b);
};



// c# side
[...].class Foo{

    [...]
    void sum(int a, int b);
}

Re: Calling Unmanaged Class From DLL

«_Superman_»5-Sep-09 5:34

«_Superman_»

5-Sep-09 5:34

DllImport is the needed keyword here.
Take a look at Calling a DLL Export Directly from C#[^]

«_Superman_»
I love work. It gives me something to do between weekends.

Re: Calling Unmanaged Class From DLL

İsmail Durmaz5-Sep-09 5:37

İsmail Durmaz

5-Sep-09 5:37

but i want to call functions from class. dllimport calls only c style functions, it doesn't support c++ classes

Re: Calling Unmanaged Class From DLL

«_Superman_»5-Sep-09 5:42

«_Superman_»

5-Sep-09 5:42

I don't think you can do that.
You will need to convert the class into a COM component and then do a COM interop.

COM interop is what Microsoft recommends.

«_Superman_»
I love work. It gives me something to do between weekends.

Re: Calling Unmanaged Class From DLL

İsmail Durmaz5-Sep-09 5:43

İsmail Durmaz

5-Sep-09 5:43

thanks a lot

Re: Calling Unmanaged Class From DLL

Joe Woodbury5-Sep-09 8:39

Joe Woodbury

5-Sep-09 8:39

Not true. You can export/import a class.

articles here: DLLs are simple: Part 2[^] and here http://msdn.microsoft.com/en-us/library/a90k134d.aspx[^].

On top of that you can demonstrate this by creating a DLL with the Visual Studio wizard. Create a Win32 project and select export symbols.

I missed the C# part of your question. You are posting in the wrong forum. You also phrased your question incorrectly, which mislead me. You used the terms "unmanaged class" and "DLL" and then threw in "the C# side."

Incidentally, if you "own" the C++ side, you can add the CLR switch to its project and use C++/CLI. (Frankly, I usually find it easier to convert the class in question to C#, but I have done what I just described.)

Re: Calling Unmanaged Class From DLL

Hristo-Bojilov5-Sep-09 7:55

Hristo-Bojilov

5-Sep-09 7:55

You should use COM objects to access C++ classes like that from .NET.

Life is a stage and we are all actors!

Re: Calling Unmanaged Class From DLL

Joe Woodbury5-Sep-09 8:48

Joe Woodbury

5-Sep-09 8:48

I apologize for my previous answer. I misread the original question due to him mixing terms.

That said, I still disagree somewhat--if he "owns" both sides, he can simply create the C++ DLL using C++/CLI.

Re: Calling Unmanaged Class From DLL

Joe Woodbury5-Sep-09 8:55

Joe Woodbury

5-Sep-09 8:55

As seen by my other answers, the phrasing of your question annoys me. The subject is "calling unmanaged class from DLL" and then you say you want to call "any class from unmanaged DLL." What is it? Are you wanting to call .NET from native C++ or call native C++ classes from .NET?

In the former case, you can host .NET in your C++ application (which is a lousy idea, but you can do it.) In the latter case you can convert the native C++ to C++/CLI and call it that way. I personally find it easier to convert the C++ classes to C# (and occasionally use a native, helper DLL with procedural APIs.)

On top of that you give a code snippet that makes no sense. If you have a C++ foo and a C# Foo, what do you care?

Re: Calling Unmanaged Class From DLL

İsmail Durmaz6-Sep-09 3:12

İsmail Durmaz

6-Sep-09 3:12

i want to call any class from native c++ into (managed-unmanaged) c#. i am looking for other ways except GUID.

Re: Calling Unmanaged Class From DLL

Joe Woodbury6-Sep-09 7:36

Joe Woodbury

6-Sep-09 7:36

There is no such thing as unmanaged C#.

To call .NET from C++ you must use COM: http://support.microsoft.com/kb/828736[^]

STL map in UNIX

ashukasama4-Sep-09 23:24

ashukasama

4-Sep-09 23:24

I want to write shell programming in UNIX, alao i am new to unix. i have written very simple program for console

ISSUE:
I added some item in map as string int pair, now i am searching string read from commandline and i am unable to find it, but if i use same code with windows . i am able to do same.

Code is as follows

//Inclue files for libraries
#include <stdlib.h>
#include <ctype.h>
#include <iostream>
#include <fstream>
#include <iostream>
#include <iomanip>
#include <ctime> 
#include <string>
#include <stdio.h>
#include <map>
#include <algorithm>

using namespace std;

map <string, int> m1;

int main(int argc, char* argv[])
{
	m1.insert(map <string, int> :: const_iterator::value_type("cd",0));		
	m1.insert(map <string, int> :: const_iterator::value_type("dir",0));		
	m1.insert(map <string, int> :: const_iterator::value_type("pwd",0));		
	m1.insert(map <string, int> :: const_iterator::value_type("echo",0));		
	m1.insert(map <string, int> :: const_iterator::value_type("help",0));		
	m1.insert(map <string, int> :: const_iterator::value_type("quit",0));		
	map <string, int> :: const_iterator m1_AcIter, m1_RcIter;
	typedef pair <string, int> Int_Pair;

	if(argc == 1)
	{
		cout<<"Please enter unix command..";
	}
	else
	{
		string command;
		command =  argv[1];            
		map <string, int> :: const_iterator m1_AcIter, m1_RcIter;
		m1_AcIter   = m1.find(command);
		if(m1_AcIter  == m1.end())
		{
			cout<<"Didn't find unix command - "<< command<<endl ;
		}
		else
		{ 
			system(command.c_str());
		}

	}
	
	map <string, int> :: iterator it;
	for ( it=m1.begin() ; it != m1.end(); it++ )
		cout << (*it).first << " => " << (*it).second << endl;
	
	return 0;

}

now i am running this code

./a.out ls

and i received following output

Didn't find unix command - ls<br />
cd =>; 0<br />
dir =>; 0<br />
echo =>; 0<br />
help =>; 0<br />
pwd =>; 0<br />
quit =>; 0

but same code is working perfectly with windows.

Re: STL map in UNIX

Richard MacCutchan4-Sep-09 23:36

Richard MacCutchan

4-Sep-09 23:36

I don't see a problem here. Your map table does not contain an entry for 'ls' so the program correctly reports it as not being found. Quite how this works on Windows remains a mystery - can you show the working sample?

Re: STL map in UNIX

ashukasama4-Sep-09 23:53

ashukasama

4-Sep-09 23:53

Above code is working, But this code is not working

//Inclue files for libraries
#include <stdlib.h>
#include <ctype.h>
#include <iostream>
#include <fstream>
#include <iostream>
#include <iomanip>
#include <ctime> 
#include <string>
#include <stdio.h>
#include <map>
#include <algorithm>

using namespace std;

map <string, int> m1;
string tokenizeReturnFirst(const string& str,const char& delimiters)
{
    string token;

    // skip delimiters at beginning.
    string::size_type lastPos = str.find_first_not_of(delimiters, 0);

    // find first "non-delimiter".
    string::size_type pos = str.find_first_of(delimiters, lastPos);
    if( pos!=string::npos)
    {
        token = str.substr(lastPos, pos - lastPos);
    }
    else
    {
        token = str;
    }


    return token;
}


int main()
{
        m1.insert(map <string, int> :: const_iterator::value_type("cd",0));        
        m1.insert(map <string, int> :: const_iterator::value_type("dir",0));        
        m1.insert(map <string, int> :: const_iterator::value_type("pwd",0));        
        m1.insert(map <string, int> :: const_iterator::value_type("echo",0));        
        m1.insert(map <string, int> :: const_iterator::value_type("help",0));        
        m1.insert(map <string, int> :: const_iterator::value_type("quit",0));        
        map <string, int> :: const_iterator m1_AcIter, m1_RcIter;
    typedef pair <string, int> Int_Pair;
    ifstream ifile( "test.bat");
    if ( ifile.fail() )
    {
        fprintf(stderr, "Cannot open %s\n", "output_file");
        return 0;
    }

    while (!ifile.eof())
    {
        string data_string ;
        getline(ifile,data_string);
        string command = tokenizeReturnFirst(data_string,string::value_type(' '));
        //std::transform( command.begin(), command.end(), command.begin(), ::tolower );
        cout<<"Searched string - "<<command <<endl;
        m1_AcIter   = m1.find(command);
        if(!command.empty())        
        {
            if(m1_AcIter  == m1.end())
            {
                cout<<"Didn't find unix command - "<< data_string<<endl ;
            }
            else
            { 
                cout<<"SYSTEM - "<< data_string.c_str()<<endl;
                system(data_string.c_str());
            }
        }
    }
    return 0;
}

Input file test.bat file content

<br />
ls<br />
pwd<br />
echo<br />
aaa<br />
quit

now i tried to execute

Input

./a.out test.bat

Output:

<br />
Searched string - ls<br />
Didn't find unix command - ls<br />
Searched string - pwd<br />
Didn't find unix command - pwd<br />
Searched string - echo<br />
Didn't find unix command - echo<br />
Searched string - aaa<br />
Didn't find unix command - aaa<br />
Searched string - quit<br />
Didn't find unix command - quit<br />
Searched string -

but file contain this command but output is wrong.

Re: STL map in UNIX

Stuart Dootson4-Sep-09 23:59

Stuart Dootson

4-Sep-09 23:59

Don't know what you're testing it on, but your code certainly works on Mac OS X 10.5.8.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: STL map in UNIX

Stuart Dootson5-Sep-09 0:02

Stuart Dootson

5-Sep-09 0:02

What line terminations does the file have? \n or \r\n? It makes a difference - if you've produced the files in Windows, then they're likely to have \r\n. Unix systems will read the \r as part of the command string, so the command you're looking for will be (for example) 'pwd\r'.

I've just tested that theory on my Mac (saved test.bat with Windows line-endings) and it reflects what you've seen.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

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