Re: Simple URL redirection proxy - C / C++ / MFC Discussion Boards

Re: Default data in data tab of combo box not working

Sujay chakraborty30-Nov-09 19:57

30-Nov-09 19:57

Hello David,

Thanks for your valuable suggestions. Actually i have figure out a weird notion in VC++ 6.0, this default data items (from data tab of properties window of the combo-box control) works superbly well with Win32 wizard application but its not working with Win32 blank application, i am trying to figure it why ?????? but couldn't succeed till now.......

If you kindly help me to sought out this issue, and please correct me if i am wrong in any sense. Your help will be greatly appreciated.

Regards
Sujay

Compare two images

franckesh24-Nov-09 6:45

franckesh

24-Nov-09 6:45

Hey,
I want to write c++ codes that could compare two images. Which steps shoul I follow. And is Pixel per pixel comparison the best? How can I implement my codes.

Thanks in advance,
Franck

Re: Compare two images - repost

Iain Clarke, Warrior Programmer24-Nov-09 7:36

Iain Clarke, Warrior Programmer

24-Nov-09 7:36

Have you tried reading the replies you got yesterday?
http://www.codeproject.com/Messages/3281531/compare-images.aspx[^]

I'm not saying if they're good or bad... but they deserve to be read and responded to.

Good luck with your problem,

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 contract work done, give me a job! http://cv.imcsoft.co.uk/[^]

Re: Compare two images

Maximilien24-Nov-09 7:42

Maximilien

24-Nov-09 7:42

It's a complex problem; because as soon as you think you found a good solution, you come to a test case where it fails and you need to add more and more exception and new tests and code.

What are the input images ? generic images or very spcific images (for example more or less all of the same images from security cameras)
What is the result of the comparison ?
- identical vs. not identical ? (pixel comparison based on images of same size),
- identical up to a % of difference ? how to quantify the difference ?
- shape recognition ? (take into account translation, scale, rotation)
- color difference ? ( blue square vs red square ?)
...

This is a good start (among tons of good links):

(link to PDF) http://cmm.ensmp.fr/~serra/communications_pdf/C-74.pdf[^]

Remember that the human brain is _VERY_ good at doing those kind of things, but computers are still very dumb at it.

Good luck.

This signature was proudly tested on animals.

Re: Compare two images

franckesh25-Nov-09 0:38

franckesh

25-Nov-09 0:38

Thanks for the replies,
the input images are black and white images of the same object(Boat in a water). I would like to be able to have a percentage(%)of differences and if possible, to make a pixel based comparison.

Thanks,
Franckesh

Re: Compare two images

David Crow24-Nov-09 16:58

David Crow

24-Nov-09 16:58

This may be of help.

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

Simple URL redirection proxy

CodingLover24-Nov-09 5:31

CodingLover

24-Nov-09 5:31

Hi all,

I want to create a simple proxy server, the process is like this. From a defined URL the request comes to the proxy server, and the proxy server select a URL based on it external process and re-direct to another URL. How can I implement this? Any examples really appreciate.

Thanks a lot.

I appreciate your help all the time...
CodingLover Smile | :)

Re: Simple URL redirection proxy

CodingLover24-Nov-09 16:24

CodingLover

24-Nov-09 16:24

Is any one have any idea about this.

I've tried this example. But it not working as I expected.

http://www.codeguru.com/cpp/i-n/internet/http/article.php/c3383/[^]

Can anyone of you please check it,

I appreciate your help all the time...
CodingLover Smile | :)

Need to call (ODBC) Data Source Administrator dialog screen while installing my MSI .( in VS 2005)

jain_MS24-Nov-09 5:28

jain_MS

24-Nov-09 5:28

HI All,
While installing my Application's MSI , it has to prompt for ODBC Data Source Administator Dialog screen , from which i can select my DSN name , UID , PASSWORD...

Please let me know ..
Ur Help much Appreciated.

Regds
Jain.

Re: Need to call (ODBC) Data Source Administrator dialog screen while installing my MSI .( in VS 2005)

Frank Seidler24-Nov-09 9:25

Frank Seidler

24-Nov-09 9:25

Hi Jain,

the ODBC Adminstrator dialog is a control panel applet named ODBCCP32.CPL. It is found in %WINDIR%\system32. The dialog is opened with control.exe like this.

C:\Windows\System32\control.exe ODBCCP32.CPL

Regards

Frank

Re: Need to call (ODBC) Data Source Administrator dialog screen while installing my MSI .( in VS 2005)

jain_MS25-Nov-09 0:13

jain_MS

25-Nov-09 0:13

Thanks a lot Frank...
Ur answer is really wounderful..

Meanwhile is there anyway to get a list of all available services in separate dialog box.

Regds
Jain

Question about an BYTE value changing into pointer, then array

yeah100024-Nov-09 4:57

yeah1000

24-Nov-09 4:57

Hi, i am in trouble with the following:

//function declarations//
void function1();
void function2(BYTE *temp);

//functions//
void function1(){
BYTE temp;
function2(&temp);
}

void function2(BYTE *temp){
int i;
for(i=0;i<10;i++){
temp[i] = 1;
}
}

How come temp can be used as an array in function2 ? function2 requires a pointer to BYTE value not a BYTE array...

TY

Re: Question about an BYTE value changing into pointer, then array

C^hris L^osinger24-Nov-09 5:19

C^hris L^osinger

24-Nov-09 5:19

yeah1000 wrote:
function2 requires a pointer to BYTE value not a BYTE array...

in C/C++, there is no (syntactical) difference between a pointer to a single variable and a pointer to the start of an array.

image processing toolkits | batch image processing

Re: Question about an BYTE value changing into pointer, then array

Nemanja Trifunovic24-Nov-09 5:34

Nemanja Trifunovic

24-Nov-09 5:34

The problem here is function2(); it is declared to take a pointer to BYTE and then assumes this pointer points to the first element of a BYTE[10] array. It is unfortunate that it compiles at all, but it has to because in C the name of array will automatically decay to the type of pointer to its first element[^].

utf8-cpp

Re: Question about an BYTE value changing into pointer, then array

CPallini24-Nov-09 7:01

CPallini

24-Nov-09 7:01

Nemanja Trifunovic wrote:
It is unfortunate that it compiles at all

I don't think so.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: Question about an BYTE value changing into pointer, then array [modified]

Nemanja Trifunovic24-Nov-09 7:11

Nemanja Trifunovic

24-Nov-09 7:11

CPallini wrote:
I don't think so

Care to explain?

[edit] Never mind - my remark would make sense if his second function was declared to have an array as parameter - somehow I thought it was Smile | :)

[/edit]

utf8-cpp

modified on Tuesday, November 24, 2009 2:24 PM

Re: Question about an BYTE value changing into pointer, then array

Iain Clarke, Warrior Programmer24-Nov-09 7:40

Iain Clarke, Warrior Programmer

24-Nov-09 7:40

Well, which is cleaner?

1)

for (i = 0; i < 7; i++)
   DoSomething (ptr [i]);

for (i = 0; i < 7; i++)
   DoSomething (*(ptr+i));

for (i = 0; i < 7; i++)
   DoSomething (*ptr++)

1 & 2 do the same thing.
3 messes up ptr too.

Iain.

Re: Question about an BYTE value changing into pointer, then array [modified]

Nemanja Trifunovic24-Nov-09 8:01

Nemanja Trifunovic

24-Nov-09 8:01

That's fine, but I don't see what it has to do with my observation that array decay was an unfortunate decision by creators of C.

If it wasn't for that, you could declare a function to accept either an array or a pointer, but it would be a compile error if you passed a pointer when an array is expected (look at OP).

[edit] Now that *I* looked at OP carefully, I see that my remark does not make sense. Somehow, I thought his second function was declared to take an array, and it really takes a pointer. [/edit]

utf8-cpp

modified on Tuesday, November 24, 2009 2:25 PM

Re: Question about an BYTE value changing into pointer, then array

David Crow24-Nov-09 17:00

David Crow

24-Nov-09 17:00

See here.

C++ question for new grad

chan1124-Nov-09 4:40

chan11

24-Nov-09 4:40

Hi there,

I have an application that should report the state of some sockets within the app but to different class. like if the socket number 0 is connected I send data 00010000 and if socket 0 is disconnected I send 00000000
if socket 1 is connected I send 00010001 and if it is disconnected I send 00000001 so the first 2 bytes shows if the socket is connected or not and the 2nd two bytes shows the socket number. here is the code:

void HHost::HCommsLink( LPVOID lpData )
{
MsgClass *pMsg;
pCmdWrapper_t CmdPkt;
TCHAR Buff[MIN_LOADSTRING];
INT BuffLen;

CmdPkt = ( pCmdWrapper_t )lpData;
try
{ if( CmdPkt )
{
// Format the State message.
memset( Buff, '\0', MIN_LOADSTRING );
BuffLen = 0;
// Socket State.
Buff[BuffLen++] = (( CmdPkt->Param1 >> 8 )& 0xFF );
Buff[BuffLen++] = ( CmdPkt->Param1 & 0xFF );
//Socket Number.
Buff[BuffLen++] = (( CmdPkt->Param2 >> 8 )& 0xFF );
Buff[BuffLen++] = ( CmdPkt->Param2 & 0xFF );
//send message to Ap.
if( pMsg = new MsgClass( HMSG_ORIGIN_IN, 0x00 ))
{
NewCnt++;
pMsg->Hdr.MsgType = 120;
pMsg->SetData( Buff, BuffLen );
// Send to APClass.
if( hMail->MboxPostTo( MBOX_WE_APClass, MBOX_DATA, ( LPVOID )pMsg, ( LPVOID )MBOX_LPARAM_MSG )> MBOX_ERR_SUCCESS )
{

LogError( "HHost", "HCommsLink", "Error: Sending Msg to AP class" );
delete pMsg;
DelCnt++;
}
}
}

}
catch( ... )
{
LogException( "HHost", "HCommsLink", 0 );
}
}

now I need to change the logic so that each message that I send has the info for all the sockets like if socket number 0 is up I send 00000001 and if socket 0 is down I send 00000000 and for socket 1 if it is up I send 00000010 .... finally if I send 00010111 that means sockets 0, 1, 2, and 4 are up and the rest are down, I need to care about 8 sockets, I am having difficulty implementing this.

I appreciate any help.

best Chan

Re: C++ question for new grad

Dave Calkins24-Nov-09 4:53

Dave Calkins

24-Nov-09 4:53

start with

socketflags = 0;

then for each socket number (total of N sockets):

for (i = 0 ... N-1)
if (socket[i] is up)
socketflags |= 1 << i;

then socketflags will contain the value you want. I'm assuming thats your question?

Re: C++ question for new grad

chan1124-Nov-09 5:03

chan11

24-Nov-09 5:03

Thanks a lot for response but I have problem displaying it in my code Param 1 shows the socket state and Param 2 shows the socket number, so I should have:
if ((CmdPkt->Param1 == 0x00) && (CmdPkt->Param2 == 0x00))
// socket 0 is down
{
//here I have to set the data to send to another class and I don't know how to show it
// like Buff[BuffLen++] = (( 0x00 >> 16 ) & 0xFF );
}

Thanks,

Chan

Re: C++ question for new grad

Dave Calkins24-Nov-09 12:53

Dave Calkins

24-Nov-09 12:53

Try the below. If the socket is up, then it sets the bit for that socket in the flag variable.

flag = 0;

//...

if (CmdPkt->Param1 != 0)
{
  flag |= 1 << CmdPkt->Param2;
}

Re: C++ question for new grad

chan1126-Nov-09 10:31

chan11

26-Nov-09 10:31

Thanks a lot, I needed array structure for this and finally could figure that one out.

Regards,
Chan

Problem with installutil.exe while install a service...

jain_MS24-Nov-09 1:25

jain_MS

24-Nov-09 1:25

Hi,
Requirement : Need to add a service while installing a MSI ( in VS2005)

So I have added installutil.exe to my Setup project -> Custom Action
and i modified the installutil.exe properties as C:\program\testing1.exe ( in Argument Column)

After doing build and install, i am not able to see any service for my application , meanwhile ..i am able to see my application testing1.vshost.exe in TASKMANAGER.

your help much appreciated

Regds
Jain

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