C / C++ / MFC

Christian Graus4-Feb-02 21:35

4-Feb-02 21:35

Rickard Andersson wrote:
And Christian Graus: Is it ok
if I "steal" your idea with the
name layout (Rickard Andersson

Knock yourself out. I'm tempted to encourage you to get rid of the awful ©0d3 ©®4©k3® thing though. Every time I see it, it makes me think you're 12 years old. Just a thought.

Sorry, I don't know the answer to your question.

Christian

I have come to clean zee pooollll. - Michael Martin Dec 30, 2001

Picture the daffodil. And while you do that, I'll be over here going through your stuff.

Rickard Andersson²⁰4-Feb-02 22:53

Rickard Andersson²⁰

4-Feb-02 22:53

Christian Graus wrote:
it makes me think you're 12 years old. Just a thought.

IS THIS AN ENOUGH GOOD SIGNATURE TO PROVE TO YOU THAT I AM NOT A 12 YEARS OLD BOY AND SORRY SO MUCH IF I'M NICE AND ASKING YOU IF THERE IS OKAY IF I DO THE SAME THING THAT YOU PERHAPS DON'T LIKE THAT I DO!!! Mad | :mad:

--------------------
Suza Computing
Rickard Andersson AND I AM NOT 12 YEARS OLD!!
ICQ: 50302279
--------------------

Christian Graus4-Feb-02 23:03

4-Feb-02 23:03

Typing in capitals has the same effect.

I am sorry if I offended you, but it's bugged me for a long time, and I thought I'd mention it while I had the opportunity. It's right up there with l33tsp34k IMO.

Christian

I have come to clean zee pooollll. - Michael Martin Dec 30, 2001

Picture the daffodil. And while you do that, I'll be over here going through your stuff.

Rickard Andersson²⁰4-Feb-02 23:18

Rickard Andersson²⁰

4-Feb-02 23:18

Peace then?

By the way, I'm 17 years! Wink | ;)

Christian Graus4-Feb-02 23:23

4-Feb-02 23:23

Rickard Andersson wrote:
Peace then?

Sure Rose | [Rose]

Rickard Andersson wrote:
By the way, I'm 17 years!

Enjoy it while you can - I'm 33.

Christian

I have come to clean zee pooollll. - Michael Martin Dec 30, 2001

Picture the daffodil. And while you do that, I'll be over here going through your stuff.

Class member inlining...???

Jon Hulatt4-Feb-02 23:19

Jon Hulatt

4-Feb-02 23:19

Christian Graus wrote:
the awful ©0d3 ©®4©k3® thing hahahahahahahahaha well said

Anyway, if you're looking at a small scale lan, then your best bet is to use hosts files on all your clients.

ie. in c:\winnt\system32\drivers\etc\hosts . The standard hosts file tells you what to do. Put your servers IP and the desired name in a hosts file on each client.

And bob's your uncle.

Jon

Sorry to dissapoint you all with my lack of a witty or poignant signature.

alex.barylski4-Feb-02 21:15

4-Feb-02 21:15

The compiler will only Inline certain functions which are defined/declared within the class structure.

So is it safe to assume the compiler will ignore inlining functions which have branching or looping or recursion...?

The reason I ask:

My member functions will not Display themselves in Classwized/view or in the auto-tool-tip windows when typing code unless I define/declare within the class structure, but a few functions would really suck if they inlined...there big(ger) and called quite a few times OMG | :OMG:

Please someone tell me I'm right...and If theres a way i can gaurantee(spelling) a function not to inline except for defining it outside the class...?

TIA and again Smile | :)

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Joaquín M López Muñoz4-Feb-02 21:31

Joaquín M López Muñoz

4-Feb-02 21:31

It is up to the compiler to decide which inlineable functions to inline, and you can do little in general to prevent this, except of course define the function outside the class declaration (and without the inline keyword). Even then, the compiler is free to inline some calls when it feels like doing it (eg., in the same compilation unit).
What strikes me is that your class wizard is not able to "see" functions unless defined in line... It shouldn't be so, take a look at some automatically generated member function (which in general are not defined inline) and try to replicate the syntax for your new member functions.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

alex.barylski4-Feb-02 21:45

4-Feb-02 21:45

It's a template class...

When i add functions there delcared/defined within the class Cry | :((

So i can't use this method...tried that already.

Nothing out of the ordinary in the clw file either...so i dunno...probably my crummy computer...needs a reformat.

Really wish there was a NOINLINE keyword...

thanx again

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Rickard Andersson²⁰4-Feb-02 23:07

Rickard Andersson²⁰

4-Feb-02 23:07

I think the only way is to define the method in a separate .cpp file or somethin and put keyword 'inline' before you define the method:

inline void CMyClass::InlineFunc(BOOL bYes)
{
m_bYesOrNo = bYes;
return 0;
}

Have I miss understod you or...

---------------------------------------------
Rickard Andersson, Suza Computing
Speciality: MFC, C++ and very little C# (for the moment)
ICQ: 50302279
---------------------------------------------
Chrisian Graus: Is this perhapas a good enough signature may be?
BECAUSE I WILL KEEP THIS ONE!

Christian Graus4-Feb-02 23:26

4-Feb-02 23:26

Rickard Andersson wrote:
Chrisian Graus: Is this perhapas a good enough signature may be?
BECAUSE I WILL KEEP THIS ONE!

Looks great to me - it's about time I was mentioned in someines sig again Smile | :)

FWIW it's good to use bool instead of BOOL, which is in fact an int.

Christian

I have come to clean zee pooollll. - Michael Martin Dec 30, 2001

Picture the daffodil. And while you do that, I'll be over here going through your stuff.

alex.barylski4-Feb-02 23:51

4-Feb-02 23:51

I was hoping for the opposite effect

making functions not inline that usually would Smile | :)

Sorta'

class MyClass{
  theFunc(){ AfxMessageBox("hey"); }

  theFunc2()
  {
    AfxMessageBox("I don't want this function to INLINE");
    m_bFake = FALSE;
    //Etc...this function is called to many times to inline
  }
};

Thanx anyways Smile | :)

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

5-Feb-02 5:44

There's a setting in the C++ tab in the optimizations category that allows three settings - disable, only inline those explicitly marked 'inline' (believe the cl'er can pass final judgement here, but should warn), and 'hey Ms compiler, you're so good at this stuff, why don't you decide what to inline'.

Would that help - or is it really a template related issue - post some code?

Andreas Saurwein5-Feb-02 6:07

Andreas Saurwein

5-Feb-02 6:07

As Jimi and Joaquín M López Muñoz say: you can do nothing except declare them correctly and let the compiler do its job according to your wishes (read /options).

Besides of this you should ask yourself another question: if the compiler thinks that a function may be inlined, why you think it should not?

Dont tell me that the function may be too big. The argument "the resulting code will be too big" is nonsense nowadays. Applications can expect "sufficient" memory to run almost any code.

So? What is left? Speed? If it gets called so many times, the compiler is right - it preserves lot of overhead for the function call and execution.

Anything else that I missed?

alex.barylski5-Feb-02 10:58

5-Feb-02 10:58

Andreas Saurwein wrote:
Besides of this you should ask yourself another question: if the compiler thinks that a function may be inlined, why you think it should not?

I always thought it was good practice to only inline those functions which were relatively small(a few push, mov and pop, ret)

My question was that i'm aware the compiler will implicity inline functions defined and declared in the class itself, but only under certain circumstances(NOT recursion, etc...)

Is there a way i can avoid this gauranteed!!!

3 member functions dec/defined in the class itself I feel are far to large to inline.

1) 500 bytes total( 51 prolog, 26 epilog) so i'd save 77 bytes if I inlined, but I'd have additional 423 bytes * already 9 function calls = 3807 bytes which could be avoided if the function didn't inline.

So under most circumstances I agree it's best to leave the compiler to do it's job, but this is an extenuating circumstance(I think).

I was unsure if the compiler would INLINE this function of mine, because it's a template class and all the functions have to dec/defined within the class(or they won't show in ClassView...? Cry | :((

)

I suppose i could have looked at the disassembly and determined if it was calling or inlining??? But i'm too lazy;P

Andreas Saurwein wrote:
Dont tell me that the function may be too big. The argument "the resulting code will be too big" is nonsense nowadays. Applications can expect "sufficient" memory to run almost any code.

Most certainly they can, with virtual memory and all(however i'm running a 266,Win98 32 MB RAM, which I find slow). However I feel this goes against what C/C++ stand for. According to(I think is the original "C Programming Language" By Kernighan&Rithchie) C is a relatively low-level language, so I'll assume C++ just follows suit, except better type checking, implementation hiding, etc...both support pointers and inline _asm

So if i didn't wanna worry about code execution and size I'd probably go back to VB...instead I find myself leaning more towards assembly Suspicious | :suss:

Have a day!

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Nemanja Trifunovic5-Feb-02 6:22

Nemanja Trifunovic

5-Feb-02 6:22

You can use #pragma auto_inline( [{on | off}] ), or compiler options /Ob

I vote pro drink Beer | [beer]

alex.barylski5-Feb-02 9:57

5-Feb-02 9:57

The pragma is much preferd Smile | :)

Could I not use function and intrinsic to accomplish the same thing...?

Thanx again

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Heap try/catch technique

alex.barylski4-Feb-02 21:09

Re: Heap try/catch technique

4-Feb-02 21:09

Does the following seem appropriate...?

Type* temp = m_pBuff;
try{
    m_pBuff = (Type*)HeapReAlloc(m_hHeap, HEAP_ALLOC, m_pBuff, nHeapSize);
}
catch(...){
    bFull = TRUE;    //Mark buffer as full
    m_pBuff = temp;  //Restore original pointer
}

Any suggestions?
Smile | :)

TIA

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Joaquín M López Muñoz4-Feb-02 21:36

Joaquín M López Muñoz

4-Feb-02 21:36

As it stands, HeapReAlloc does not throw any exception (it returns NULL on failure), so your exception handler will never be called. You can add the flag HEAP_GENERATE_EXCEPTIONS to indicate HeapReAlloc to throw on exception if it fails, but even so the technique is probably more expensive (in computational terms) than the simpler check against NULL (IMHO).

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Heap try/catch technique

alex.barylski4-Feb-02 21:40

Re: Heap try/catch technique

4-Feb-02 21:40

HEAP_ALLOC macro actually expands

HEAP_NO_SERIALIZE | HEAP_GENERATE_EXCEPTIONS | HEAP_ZERO_MEMORY

sorry bout that.

I can't for some reason get HeapAlloc/ReAlloc to return NULL

even if i try it with 2,000,000,000 byte request it succeeds(without GEN_EXCEPTIONS)...but the exception fires, so i dunno...

Other than this...is everything OK...? Smile | :)

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Joaquín M López Muñoz4-Feb-02 22:01

Joaquín M López Muñoz

4-Feb-02 22:01

It's weird what you're saying... You might try calling GetExceptionCode in the handler to see what exception is being thrown (STATUS_NO_MEMORY or STATUS_ACCESS_VIOLATION).

Other than this...is everything OK...?

I guess it is, but this is surely masking some underlying problem that probably will strike back in some other form sooner or later. I'd suggest you investigate the reasons why HeapReAlloc seems to behave differently depending on whether it is raising exceptions or not.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

A problem with "find" operations in an application with CHtmlView

AVR4-Feb-02 20:53

AVR

4-Feb-02 20:53

In an application, I have used a class derived from CHtmlView. I wish to perform the typical find operations on it i.e. find a word and highlight it, find the next occurrence of the word, find the previous occurrence of the word.

Whenever I use the function findText of IHTMLTxtRange, with the parameter "forward " set to a +ve value, the forward search occurs correctly. But if I use the function with a negative value of forward, then the function doesnt work. (although it should,as per the documentation)

WHAT MAY BE THE REASON?

HERE IS A CODE SNIPPET OF WHAT I DID:

IHTMLDocument2 *lpHtmlDocument = NULL;
LPDISPATCH lpDispatch = NULL;

lpDispatch = m_pHelpDataView->GetHtmlDocument();
ASSERT(lpDispatch);

lpDispatch->QueryInterface(IID_IHTMLDocument2, (void**)&lpHtmlDocument);
ASSERT(lpHtmlDocument);

lpDispatch->Release();

IHTMLElement *lpBodyElm;
IHTMLBodyElement *lpBody;
IHTMLTxtRange *lpTxtRange;

lpHtmlDocument->get_body(&lpBodyElm);
ASSERT(lpBodyElm);
lpHtmlDocument->Release();
lpBodyElm->QueryInterface(IID_IHTMLBodyElement,(void**)&lpBody);

ASSERT(lpBody);
lpBodyElm->Release();
lpBody->createTextRange(&lpTxtRange);
ASSERT(lpTxtRange);
lpBody->Release();

CComBSTR search(FindName.GetLength()+1,(LPCTSTR)FindName);
bool bFound,bTest;
long t;

***lpTxtRange->findText((BSTR)search,forward,bMatchCase+bMatchWholeWord,(VARIANT_BOOL*)&bFound);

........

***lpTxtRange->select();

when the owner window of caret is inactive

AnonymousBabe@usa.net4-Feb-02 20:21

AnonymousBabe@usa.net

4-Feb-02 20:21

1)the caret will be destroyed by system? or should be destroyed by programmer?

2)if there is two mdi child windows, one is closed, which message need to be handled to show the caret on the other mdi window? even i don't know how to
process the OnActivateView method.

Re: when the owner window of caret is inactive

alex.barylski4-Feb-02 20:45