Re: Question about an BYTE value changing into pointer, then array - C / C++ / MFC Discussion Boards

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.

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: 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

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

loyal ginger24-Nov-09 3:16

loyal ginger

24-Nov-09 3:16

Did you make sure the account you are using have the proper privilage to install a service?

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

jain_MS24-Nov-09 3:56

jain_MS

24-Nov-09 3:56

Yes Loyal, i have administrator rights on this machine..

Meanwhile is it possible to install a service in Setup project using installutil.exe in CustomAction.

If not please provide a alternative solution.

Data from DB to Excel

hellogany23-Nov-09 22:50

hellogany

23-Nov-09 22:50

Hi All

I have developed a windows based application in VC++

The GUI Interacts with the DB and shows the result in the windw..

Til now am working fine.Now the next task is to download the available data from the DB to the excel sheet.

Can anyone guide me to do??

Thanks
Gany

Re: Data from DB to Excel

Rajesh R Subramanian23-Nov-09 22:54

Rajesh R Subramanian

23-Nov-09 22:54

Simply write the data as a CSV file[^]. Excel can handle a CSV file.

“Follow your bliss.” – Joseph Campbell

Re: Data from DB to Excel

Dave Calkins24-Nov-09 4:54

Dave Calkins

24-Nov-09 4:54

CSV is a good way to go as the other poster suggested. If that doesn't do it you could resort to using the Excel OLE Automation interface.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.