Re: Problems with malloc - C / C++ / MFC Discussion Boards

Mike Dimmick5-Feb-05 9:05

5-Feb-05 9:05

I suggest hiding the other controls. It should be a simple case of calling ShowWindow(SW_HIDE) on them. You can use GetWindow(GW_NEXT) to find the other controls.

Stability. What an interesting concept. -- Chris Maunder

Re: RedrawWindow(), Invalidate() ?

BlackDice5-Feb-05 9:10

BlackDice

5-Feb-05 9:10

that's what I ended up doing. I used EnumChildWindows() with this function:

BOOL __stdcall MyHideWindow(HWND hwnd, LPARAM lparam)
{
		BOOL* pbVisible = (BOOL*)lparam;
		CWnd *pWnd = CWnd::FromHandle(hwnd);
		int nCurrentID = pWnd->GetDlgCtrlID();

		//some controls shouldn't be bothered, leave those alone
		if(nCurrentID != IDC_PROJECT && nCurrentID != IDC_PROJECTSTATIC &&
			nCurrentID != IDC_VIEWSTATIC && nCurrentID != IDC_FILTER &&
			nCurrentID != IDC_CUSTOM1 && nCurrentID != IDC_TEST)
		{
			int nCmdShow = (*pbVisible ? SW_SHOW : SW_HIDE);
			pWnd->ShowWindow(nCmdShow);
		}
	   return TRUE;
}

then send it in a true or a false for which one I want to do, leaving certain controls alone.

My articles

www.stillwaterexpress.com

BlackDice

Playing WAV files

Grahamfff5-Feb-05 5:32

Grahamfff

5-Feb-05 5:32

I need to play a WAV file when a push button is pressed, I did try the Wave Class for Playing and Recording Wave Files class on this site but complained about the my WAVs being invalid format.

Any simple examples out there that work for VS 7.1

Many thanks.

grahamfff

Re: Playing WAV files

PJ Arends5-Feb-05 10:44

PJ Arends

5-Feb-05 10:44

PlaySound[^]

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04

Within you lies the power for good - Use it!

Honoured as one of The Most Helpful Members of 2004

Re: Playing WAV files

Blake Miller7-Feb-05 5:25

Blake Miller

7-Feb-05 5:25

At the very least, make sure PlaySound can play your WAV files.
Maybe they ARE in an invalid format, or you are not setting up the format information correctly prior to using the WAV play class.

Problems with malloc

r3dqu33n5-Feb-05 1:12

r3dqu33n

5-Feb-05 1:12

I have a problem with the free instruction under win32, t raise an error when i try to free allocated memory after i allocated it with malloc, i don't know why, if the MSDN indicates that is right.

The code i use is some like this:

LPSTR lpCode=(char *)malloc(MAX_PATH);
strcpy(lpCode,lpText);
SendMessage(GetDlgItem(hMain,IDE_RTFBOX),WM_SETTEXT,NULL,(LPARAM)lpText);
free(lpText);
Sniff | :^)

Re: Problems with malloc

WoutL5-Feb-05 1:25

WoutL

5-Feb-05 1:25

I have no idee why you're allocating memory for a variable you don't use, but when you use malloc on lpCode you should use free on lpCode too. Not on lpText, which is a totaly different variable...

Wout Louwers

Re: Problems with malloc

r3dqu33n5-Feb-05 1:38

r3dqu33n

5-Feb-05 1:38

Excuse me i forgot these lines:

char lpText[]="Hello world";

...

free(lpCode);

When i free the memory allocated in lpCodeit raise an error
The first example code was wrong excuse me.

Re: Problems with malloc

WoutL5-Feb-05 1:54

WoutL

5-Feb-05 1:54

But the line

free(lpText);

does that exists in your code? Beacause that line is wrong. Please try your code without that line...

Wout Louwers

Re: Problems with malloc

Anonymous5-Feb-05 3:57

Anonymous

5-Feb-05 3:57

You should try
lpText=(char*)malloc(32);
strcpy(lpText,"Hello world\n");

...

free(lpCode);
free(lpText);

Re: Problems with malloc

Mike Dimmick5-Feb-05 1:57

Mike Dimmick

5-Feb-05 1:57

SendMessage is synchronous. It's perfectly OK to use lpText as the parameter. SendMessage will not return until the receiving window has handled the message.

If you wrote the control with ID IDE_RTFBOX, and overrode WM_SETTEXT, you should make a copy of the argument there.

Stability. What an interesting concept. -- Chris Maunder

Re: Problems with malloc

Michael Dunn5-Feb-05 20:49

Michael Dunn

5-Feb-05 20:49

You're freeing the wrong thing. free(lpCode) instead Smile | :)

--Mike--
LINKS~! Ericahist | 1ClickPicGrabber | CP SearchBar v2.0.2 | C++ Forum FAQ | You Are Dumb
Strange things are afoot at the U+004B U+20DD

HTTP chunked encoding

Taka Muraoka4-Feb-05 23:47

Taka Muraoka

4-Feb-05 23:47

Anyone know how to turn it off from a WinInet-based client?

I'm getting hit by Q263754: WinInet Application Stops Responding and Shows 100-Percent CPU Utilization[^]. The problem only occurs when chunked encoding is enabled.

They recommend that you use HTTP 1.0, which doesn't support chunked encoding, except that specifying HTTP 1.0 in the request doesn't fscking work!!![^] WTF | :WTF:

Their recommendation is to change a setting in the registry to force IE/WinInet to use HTTP 1.0. It would, of course, be extremely poor form for my application to do this so is there anything else I can do?

I tried setting a "Transfer-Encoding: identity" header in my request but that causes the HttpSendRequest() call to hang Frown | :-(

Lets be honest, isn't it amazing how many truly stupid people you meet during the course of the day. Carry around a pad and pencil, you'll have twenty or thirty names by the end of the day - George Carlin

Awasu 2.1 [^]: A free RSS reader with support for Code Project.

A Problem with PostgreSQl

tranglt4-Feb-05 22:44

tranglt

4-Feb-05 22:44

I have a proplem when I insert data into a binary field of table.
I use ODBC and MFC.

thank you very much. Roll eyes | :rolleyes:

GDI+ Bitmaps

jgeorge214-Feb-05 22:04

jgeorge21

4-Feb-05 22:04

In my quest for a simple to use image loading library I came across GDI+. I only want to use the portion of GDI+ that loads images, since it loads every image type that I would ever need into a DIB (which I can extract and feed OpenGL). However, I have the most annoying and frustrating issue: the image is not loaded and the lastResult member of the Bitmap object indicates InvalidParameter. Obviously I'm feeding it something bad. The relevant code snippet follows:

<br />
xBoolean xImage::Load (char *fileName, xBoolean mipmap)<br />
{<br />
	BitmapData	*bmpData = new BitmapData ();<br />
	Rect		*rect = new Rect ();<br />
	sint32		format, stride;<br />
	uint32		i, j;<br />
	xbyte		*tempBuffer;<br />
	uint32		wideLen;<br />
	WCHAR		*fileNameW = NULL;<br />
<br />
	if (fileName == NULL)						// Early out if string is NULL<br />
	return xfalse;<br />
<br />
	// Convert C string to UNICODE<br />
	wideLen = MultiByteToWideChar (CP_ACP, MB_PRECOMPOSED, fileName, -1, NULL, 0);		// Get necessary length<br />
	fileNameW = (WCHAR *)malloc (wideLen);							// Alloc string<br />
	MultiByteToWideChar (CP_ACP, MB_PRECOMPOSED, fileName, -1, fileNameW, wideLen);		// Translate string<br />
<br />
	Bitmap		bmp ((const WCHAR *)fileNameW, FALSE);<br />
<br />
	...<br />

The string fileName is being properly translated to fileNameW as below:

<br />
// Original String<br />
	fileName[0]	119 'w'	char<br />
	fileName[1]	104 'h'	char<br />
	fileName[2]	105 'i'	char<br />
	fileName[3]	116 't'	char<br />
	fileName[4]	101 'e'	char<br />
	fileName[5]	46 '.'	char<br />
	fileName[6]	116 't'	char<br />
	fileName[7]	103 'g'	char<br />
	fileName[8]	97 'a'	char<br />
	fileName[9]	0	char<br />
<br />
// Wide String<br />
	fileNameW[0]	119	unsigned short<br />
	fileNameW[1]	104	unsigned short<br />
	fileNameW[2]	105	unsigned short<br />
	fileNameW[3]	116	unsigned short<br />
	fileNameW[4]	101	unsigned short<br />
	fileNameW[5]	46	unsigned short<br />
	fileNameW[6]	116	unsigned short<br />
	fileNameW[7]	103	unsigned short<br />
	fileNameW[8]	97	unsigned short<br />
	fileNameW[9]	0	unsigned short<br />

The constructor for the Bitmap object is as follows:

<br />
class Bitmap : public Image<br />
{<br />
public:<br />
    friend class Image;<br />
    friend class CachedBitmap;<br />
<br />
    Bitmap(<br />
        IN const WCHAR *filename,<br />
        IN BOOL useEmbeddedColorManagement = FALSE<br />
    );<br />

Recall that the lastResult member is being set to InvalidParameter. Here are the possible GDI+ return values:

<br />
enum Status<br />
{<br />
    Ok = 0,<br />
    GenericError = 1,<br />
    InvalidParameter = 2,<br />
    OutOfMemory = 3,<br />
    ObjectBusy = 4,<br />
    InsufficientBuffer = 5,<br />
    NotImplemented = 6,<br />
    Win32Error = 7,<br />
    WrongState = 8,<br />
    Aborted = 9,<br />
    FileNotFound = 10,<br />
    ValueOverflow = 11,<br />
    AccessDenied = 12,<br />
    UnknownImageFormat = 13,<br />
    FontFamilyNotFound = 14,<br />
    FontStyleNotFound = 15,<br />
    NotTrueTypeFont = 16,<br />
    UnsupportedGdiplusVersion = 17,<br />
    GdiplusNotInitialized = 18,<br />
    PropertyNotFound = 19,<br />
    PropertyNotSupported = 20<br />
};<br />

It isn't that it can't find the file, GDI+ is initialized properly, and it isn't any useful error. One other thing, if I change the line

<br />
Bitmap		bmp ((const WCHAR *)fileNameW, FALSE);<br />

to read

<br />
Bitmap		*bmp = new Bitmap ((const WCHAR *)fileNameW, FALSE);<br />

the compiler spits an error about not finding the constructor, which I found odd. If anyone can help, it would be much appreciated.

Re: GDI+ Bitmaps

PJ Arends5-Feb-05 8:57

PJ Arends

5-Feb-05 8:57

jgeorge21 wrote:
fileName[5] 46 '.' char
fileName[6] 116 't' char
fileName[7] 103 'g' char
fileName[8] 97 'a' char

From MSDN:
[quote]
Bitmap::Bitmap(filename, useIcm)
Creates a Bitmap object based on an image file.

Bitmap(
const WCHAR* filename,
BOOL useIcm
);
Parameters
filename
[in] Pointer to a null-terminated string that specifies the path name of the image file. The graphics file formats supported by GDI+ are BMP, GIF, JPEG, PNG, TIFF, Exif, WMF, and EMF.
[/quote]

I do not see tga in the list of supported formats.

Try http://www.codeproject.com/bitmap/cximage.asp[^] instead.

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04

Within you lies the power for good - Use it!

Honoured as one of The Most Helpful Members of 2004

archiving code or binary within my prog

Spiritofamerica4-Feb-05 20:25

Spiritofamerica

4-Feb-05 20:25

hello

This is meant as a theorethical programming question basically but if you could acompany some examples in c and vbs to your answers as examples or proof of concepts that would be lovely.

So the question is:

Can code be archived(made smaller than it actually is)?
Like for exemple could I have a function make_code_big_again that could receive as a parameter a array like structure, string wharever containing some code that was made small andmake it bigg again and run it???

or could this be done with binary files???

like could I somehow archive them, put them inside the exe in a big string or as resources and then unpack them, but withouth utilising any third paryt software like winrar or winzip cause that wouldn't make the program very platform independent.

???

thank you for your time

Re: archiving code or binary within my prog

jgeorge214-Feb-05 22:11

jgeorge21

4-Feb-05 22:11

Sure, if the code is run on an interpreter.

Re: archiving code or binary within my prog

Maximilien5-Feb-05 3:41

Maximilien

5-Feb-05 3:41

something like an auto-extractable zip archive ? yes it's possible...

I think that you can find an example somewhere here on codeproject.

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: archiving code or binary within my prog

C^hris L^osinger5-Feb-05 3:44

C^hris L^osinger

5-Feb-05 3:44

if you put that code in DLLs which are loaded dynamically (ie. using LoadLibrary, etc), you can compress them (use zLib), attach them to the end of your loader EXE.

it could be similar to this: http://www.codeproject.com/file/self_extractor.asp[^], but with the added decompression step.

Image Toolkits | Image Processing | Cleek

create thread in run time

javad_20054-Feb-05 20:23

javad_2005

4-Feb-05 20:23

how to create thread in runtime

Re: create thread in run time

2249174-Feb-05 21:00

224917

4-Feb-05 21:00

UINT thFun(void*){
return 0;
}
fun(){
AfxBeginThread(thFun,NULL); //starts thFun() in a new thread
return 0;
}

This creats a worker thread. There is something called UI thread also-
search cp for them ...

suhredayan
There is no spoon.

XML Parsing in VC++

cj_rahul4-Feb-05 19:55

cj_rahul

4-Feb-05 19:55

I have 2 parse a xml in my vc++ programs , which parser should i used , how 2 implement that.

Rahul Agarwal

Re: XML Parsing in VC++

ThatsAlok4-Feb-05 22:02

ThatsAlok

4-Feb-05 22:02

there is very well documented Interface in COM known as IXMLDOMDocument,IXMLDOMElement which help you in parsing the XML.
MSDN has Example to show working of IXMLDOMDocument, IXMLDOMElement.

"I Think this Will Help"
<h5
alok gupta="" <br=""> visit me at http://www.thisisalok.tk

Re: XML Parsing in VC++

ThatsAlok5-Feb-05 0:31

ThatsAlok

5-Feb-05 0:31

Hain Rahul,
Here is your Sample Code For XML Parsing in both VB and vc++. i hace taken this code from the MSDN

[Visual Basic]
Example
The following Microsoft® Visual Basic® example creates an IXMLDOMAttribute object from the first attribute of the root and displays the object's value and xml properties.

Dim xmlDoc As New Msxml2.DOMDocument
Dim root As IXMLDOMElement
Dim objDOMatt As IXMLDOMAttribute
xmlDoc.async = False
xmlDoc.Load ("books.xml")
Set root = xmlDoc.documentElement
Set objDOMatt = root.firstChild.Attributes.Item(0)
MsgBox (objDOMatt.Value)
MsgBox (objDOMatt.xml)

[C/C++]
Example

#import "msxml3.dll"
using namespace MSXML2;

#define CHECK_AND_RELEASE(pInterface)  \
if(pInterface) \
{\
pInterface->Release();\
pInterface = NULL;\
}\

#define RELEASE(pInterface)  \
{\
pInterface->Release();\
pInterface = NULL;\
}\

_variant_t varValue;
BSTR bstrAttributeName = ::SysAllocString(_T("dateCreated"));
IXMLDOMElement *pIXMLDOMElement = NULL;
IXMLDOMDocument *pIXMLDOMDocument = NULL;
HRESULT hr;

try
{
   // Initialize pIXMLDOMDocument and load an
   // XML file into it.
   // Get the document root.
   hr = pIXMLDOMDocument->get_documentElement( &pIXMLDOMElement);
   SUCCEEDED(hr) ? 0 : throw hr;
   if(pIXMLDOMElement)
   {
      varValue = _T("year 2000");
      hr = pIXMLDOMElement->setAttribute(bstrAttributeName, varValue);
      SUCCEEDED(hr) ? 0 : throw hr;

      hr = pIXMLDOMElement->getAttribute(bstrAttributeName, &varValue);
      SUCCEEDED(hr) ? 0 : throw hr;

      if(varValue.vt != VT_NULL)
      {
         ::MessageBox(NULL, _bstr_t(varValue), bstrAttributeName, MB_OK);
         bResult = TRUE;
      }
      RELEASE(pIXMLDOMElement);
   }
   ::SysFreeString(bstrAttributeName);
   bstrAttributeName=NULL;
}
catch(...)
{
   if(bstrAttributeName)
   {
      ::SysFreeString(bstrAttributeName);
      bstrAttributeName = NULL;
   }
   CHECK_AND_RELEASE(pIXMLDOMElement);
   DisplayErrorToUser();
}

// Release pIXMLDOMDocument when finished with it.
Output (in a message box)
Year 2000

---
And Please Don't refer me BY SIR,as i don't deserve it yet,may be after 10 or 20 years Smile | :)

"I Think this Will Help"
<h5
alok gupta="" <br=""> visit me at http://www.thisisalok.tk

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