C / C++ / MFC

Alexander ^M.,24-Jul-03 3:06

24-Jul-03 3:06

lol, a similar problem was posted here some days ago...
define char m_pData[256][4]; GLOBAL!

this should solve the problem

Don't try it, just do it! Wink | ;-)

John M. Drescher24-Jul-03 3:19

24-Jul-03 3:19

I think the only reason why that solved your problem is that if you step past the end of a global variable you are probably not going to interfere with the runtime stack. Your problem probably still exists but in a sneaky way. Try the following declare your values array as

double ValuesArray[190];

Guess what it probably will not crash your dialog this time either. Why does it not crash the dialog? It is overwriting other variables in your global data that could come back and cause your program to work in an unexpected way.

John

John M. Drescher24-Jul-03 3:32

24-Jul-03 3:32

I just tested my theory and it worked. I created a dialog application and in my OnOk() function I did the following which caused a crash because I am stepping past the end of ValuesArray.

void CStackOverflowDlg::OnOK() 
{
	double ValuesArray[200];
	for(int i=0;i < 300;i++) {
		ValuesArray[i] = 100.0;
	}
}

Guess what moving ValuesArray to the global namespace and there was no crash at all.

double ValuesArray[200];
void CStackOverflowDlg::OnOK() 
{
//	double ValuesArray[200];
	for(int i=0;i < 300;i++) {
		ValuesArray[i] = 100.0;
	}
}

But have I fixed the problem? Absolutely NO! I still am using more items ValuesArray than I declared...

John

superstein24-Jul-03 3:28

superstein

24-Jul-03 3:28

The array is define global and public in the header file.
I have not yet been able to use the array, because when I
define it the application stops before I'm able to do anything.

a bit of the source code:

#pragma once<br />
<br />
#include "afxwin.h"<br />
<br />
#define MAX_DATARULES	256<br />
<br />
<br />
// CSpeechControlDlg dialog<br />
class CSpeechControlDlg : public CDialog<br />
{<br />
// Construction<br />
public:<br />
	CSpeechControlDlg(CWnd* pParent = NULL);	<br />
	HWND m_hwndForeground;<br />
        HWND m_oldfocus;<br />
	<br />
	char *m_pData[MAX_DATARULES][4];	<br />
<br />
....<br />

I need to use an array to fill it with information about speech commands
which the application recognizes.

It compiles, and links, but stops with an access violation exception!
When I created a new project this initialization worked perfectly,
this makes me very confused!

Cedric Moonen24-Jul-03 3:39

Cedric Moonen

24-Jul-03 3:39

First, with this declatration: char *m_pData[MAX_DATARULES][4]; you just declare a two dimensional array that will contains .... POINTERS TO CHAR !!! I think you have to remove the * !!

Second, if you never use the array, the problem is not because of your array ! Are you sure you never try to write or try to read in it ??? If you try to access one 'cell', be carefull: in your case it's not a char but a pointer. And this pointer is NOT INITIALIZED so, it contins an invalid adress. That's probably why you have an error !

Bob Stanneveld24-Jul-03 11:17

Bob Stanneveld

24-Jul-03 11:17

cedric moonen wrote:
I think you have to remove the * !!

I'm sure that you should remove the '*' Smile | :)

Besides that, you are not declaring a 2 dimensional array, but an array with 3 dimensions!!! If you want to use pointers, you have to initialize the array!

this should work:
char m_pData[MAX_DATARULES][4];
the pointer version
char *m_pData[4];
and initialize it this way:
for(int i = 0; i < MAX_DATARULES;i++) m_pData[i] = (char**) malloc(sizeof(char*));

:-OI haven't been doing such things lately so the initialisation could contain some errors Blush | :O

good luck!

A student knows little about a lot.
A professor knows a lot about little.
I know everything about nothing.

John M. Drescher24-Jul-03 3:40

24-Jul-03 3:40

Ok. For each data rule what are you storing?? Your code is written so that for each data rule you are storing a 4 pointers to characters. Here is what I mean:

#define DATA_SIZE 100
m_pData[RULE_0][0] = new char(DATA_SIZE);
m_pData[RULE_0][1] = new char(DATA_SIZE);
m_pData[RULE_0][2] = new char(DATA_SIZE);
m_pData[RULE_0][3] = new char(DATA_SIZE);

strcpy(m_pData[RULE_0][0],"This is a test");
strcpy(m_pData[RULE_0][1],"This is a test");
strcpy(m_pData[RULE_0][2],"This is a test");
strcpy(m_pData[RULE_0][3],"This is a test");

I bet this is not what you want...

John

Sorry...

John M. Drescher24-Jul-03 7:28

24-Jul-03 7:28

I thought you were the one who had the original array question... It was spaced_out. In either case I beleive the problem was not solved and just hidden.

John

Cedric Moonen24-Jul-03 3:08

Cedric Moonen

24-Jul-03 3:08

Can you post the code so we can take a look of what you're doing?

The problem can be if you use character strings, don't forget that there is a null character that is appended (so your string has to be 1 char larger than what it contains).
What do you what to do with char m_pData[256][4] ? Do you know that it means you have 256 strings of 3 characters (because of the null char) and NOT 4 strings of 256 char ?

John M. Drescher24-Jul-03 3:09

Need value of EncoderSaveAsCMYK (Gdi+)

24-Jul-03 3:09

You need to tell us more information about your problem? What size of aray do you need? Why do you need it to be 2 dimensional?

John

Marakus24-Jul-03 3:01

Marakus

24-Jul-03 3:01

Hello ,
i don't use C++ but the GDI+ 1.1
extension in VB6 and i missing
the new const EncoderSaveAsCMYK !!!!
I don't know the value , ir must be a GUID String ,
can some tell me the value or mail it to me ?
I think it is in this file GdiPlusImaging.h
but you need a new version of it .
Did some know a MS download url how found this files
for the GDI+ ?

Thanks!!!! Smile | :)

Markus Rauch

Re: Need value of EncoderSaveAsCMYK (Gdi+)

Fistboy24-Jul-03 4:12

Fistboy

24-Jul-03 4:12

From PlatformSDK\Include\GDIPlusImaging.h

<br />
enum ImageFlags<br />
{<br />
    ImageFlagsNone                = 0,<br />
<br />
    // Low-word: shared with SINKFLAG_x<br />
<br />
    ImageFlagsScalable            = 0x0001,<br />
    ImageFlagsHasAlpha            = 0x0002,<br />
    ImageFlagsHasTranslucent      = 0x0004,<br />
    ImageFlagsPartiallyScalable   = 0x0008,<br />
<br />
    // Low-word: color space definition<br />
<br />
    ImageFlagsColorSpaceRGB       = 0x0010,<br />
    ImageFlagsColorSpaceCMYK      = 0x0020,<br />
    ImageFlagsColorSpaceGRAY      = 0x0040,<br />
    ImageFlagsColorSpaceYCBCR     = 0x0080,<br />
    ImageFlagsColorSpaceYCCK      = 0x0100,<br />
 <br />
    // Low-word: image size info<br />
<br />
    ImageFlagsHasRealDPI          = 0x1000,<br />
    ImageFlagsHasRealPixelSize    = 0x2000,<br />
<br />
    // High-word<br />
<br />
    ImageFlagsReadOnly            = 0x00010000,<br />
    ImageFlagsCaching             = 0x00020000<br />
};<br />

From PlatformSDK\Include\GDIPlusEnums.h

//---------------------------------------------------------------------------
// Image encoder value types
//---------------------------------------------------------------------------

enum EncoderValue
{
EncoderValueColorTypeCMYK,
EncoderValueColorTypeYCCK,
EncoderValueCompressionLZW,
EncoderValueCompressionCCITT3,
EncoderValueCompressionCCITT4,
EncoderValueCompressionRle,
EncoderValueCompressionNone,
EncoderValueScanMethodInterlaced,
EncoderValueScanMethodNonInterlaced,
EncoderValueVersionGif87,
EncoderValueVersionGif89,
EncoderValueRenderProgressive,
EncoderValueRenderNonProgressive,
EncoderValueTransformRotate90,
EncoderValueTransformRotate180,
EncoderValueTransformRotate270,
EncoderValueTransformFlipHorizontal,
EncoderValueTransformFlipVertical,
EncoderValueMultiFrame,
EncoderValueLastFrame,
EncoderValueFlush,
EncoderValueFrameDimensionTime,
EncoderValueFrameDimensionResolution,
EncoderValueFrameDimensionPage
};

(EncoderValueColorTypeCMYK is value zero)

Re: Need value of EncoderSaveAsCMYK (Gdi+)

Marakus24-Jul-03 6:39

Marakus

24-Jul-03 6:39

Hello ,

but i missing EncoderSaveAsCMYK (not EncoderValueColorTypeCMYK) it is a GUID

as String it looks like this {ef636393-f343-11d0-9477-00c04fd36226}
in the C++ Header it is in Bytes like ef,63,63,93,f3,43,11,d0,94,77,00,c0,4f,d3,62,26

In GDI+ Version 1.0 it is not implemented but it must be in 1.1 .

thank you to help me Frown | :-(

Markus Rauch

comment/uncomment macro

sunil_g1724-Jul-03 2:33

sunil_g17

24-Jul-03 2:33

hi
i have written a macro, which will comment/uncomment all the occurences of a particular function call like all printfs in the opened file
i want to do the same operation for all project files,
can any one help me,

Regards
Sunil

Re: Message

Fistboy24-Jul-03 2:27

Fistboy

24-Jul-03 2:27

The first window will receives:

1) WM_KILLFOCUS with wParam set to the window you clicked.
2) WM_ACTIVATE with wParam=WA_INACTIVE.
3) WM_ACTIVATEAPP with wParam=FALSE.

You can use the Spy++ tool to see all this.

- Fistboy

Re: Message

Alexander ^M.,24-Jul-03 2:44

How can I handle hardware intrrupt message?

24-Jul-03 2:44

a better english would be really nice, thx

Don't try it, just do it! Wink | ;-)

Behzad Ebrahimi24-Jul-03 2:17

Behzad Ebrahimi

24-Jul-03 2:17

How can I handle hardware intrrupt message or override (Interrupt Service Routin)ISR?

Alexander ^M.,24-Jul-03 2:39

24-Jul-03 2:39

i wrote a proggy for that, maybe i will post it on codeproject in some days... i'm still working on it, so be patient!

what os do u need a hook for, and what is the aim of this hook?

Don't try it, just do it! Wink | ;-)

Behzad Ebrahimi24-Jul-03 3:33

Behzad Ebrahimi

24-Jul-03 3:33

I have an simple PCI device.
I want to read its data without pooling.
My OS is first Win98 (then Win XP).

Please do it;) as soon as Rose | [Rose]

John M. Drescher24-Jul-03 3:53

24-Jul-03 3:53

This will not be easy. You need to download the DDK (device driver kit) for windows 98 and XP. In windows 98 you may be able to not use a device driver and can write a standard DOS ISR but with interrupt sharing (many devices can share the same hardware interrupt) you may run into problems. So you would have to write a VXD (device driver) for Win98 and a SYS for XP. There should be some documentation how to do this in the DDK for each of these.

John

Alexander ^M.,24-Jul-03 5:31

24-Jul-03 5:31

LOOL, looks like u don't really know very much about that John!

ok Behzad, first you have to get the device driver kit from microsoft, it's free, only shipping has to be paid! (ddk is not free for download, u'll have to order it!)
-> you can find the online documentation of the ddk at http://msdn.microsoft.com[^] in section "Windows Development\Driver Development Kit".
-> ddk order here: http://www.microsoft.com/whdc/ddk/winddk.mspx[^]
i can only tell you, how this works on windows nt based systems, i dont like win98, so i dont code drivers 4 it Cool | :cool:

to connect to these interrupt events, use the IoConnectInterrupt API!

you will find more detailed infos here:
http://www.winnetmag.com/Articles/Index.cfm?ArticleID=298&[^]
http://www.microsoft.com/mspress/books/sampchap/2507b.asp[^]

with source code:
http://www.beyondlogic.org/interrupts/winnt_isr_dpc.htm[^]

@john: coding device drivers is NOT DIFFICULT!

Don't try it, just do it! Wink | ;-)

John M. Drescher24-Jul-03 5:41

24-Jul-03 5:41

Alexander M. wrote:
looks like u don't really know very much about that John!

No its not my are of interest, however I have created device drivers.

Alexander M. wrote:
first you have to get the device driver kit from microsoft, it's free, only shipping has to be paid! (ddk is not free for download, u'll have to order it!)

I downloaded all of the DDKs for free a few years back...

Alexander M. wrote:
@john: coding device drivers is NOT DIFFICULT!
I agree but It is not for the beginner programmer...

John

Alexander ^M.,24-Jul-03 6:46

24-Jul-03 6:46

who called Behzad Ebrahimi a beginner?

Don't try it, just do it! Wink | ;-)

John M. Drescher24-Jul-03 6:58