C / C++ / MFC Discussion Boards

Re: Beginner's Question

UKM_Student11-Sep-09 3:31

UKM_Student

11-Sep-09 3:31

THANKS,didn't know it was that easy LOL :P

Re: Beginner's Question

Richard MacCutchan11-Sep-09 3:25

Richard MacCutchan

11-Sep-09 3:25

You don't have a statemnt that calculates the square of the number, let alone one that prints it.

I think you may find it better to get hold of a teaching aid and work through the examples therein. Take a look on Amazon, Safari, Google etc and find an introductory C++ book to work through. That is likely to give you a much better grounding in the basics.

I would also recommend "The C Programming Language" by Kernighan & Ritchie. Although applying only to the C, rather than C++ language, it is a superb reference work for someone as new as you, and covers all the basics in fairly simple language.

Re: Beginner's Question

CPallini11-Sep-09 3:14

CPallini

11-Sep-09 3:14

Some examples:

int a=5;
if ( a > 10 )
{
  a = a-10;
}
else
{
  a = a + 1;
}
a = a + 2;

Since a is not greater than 10 then the else block content (namely a = a + 1;) is executed , and, afterwards the a = a + 2; statement sets the a final value to 8.

int a=5;
if ( a > 10 )
{
  a = a-10;
}
a = a + 2;

Since a is not greater than 10 and NO else block is present, the execution reaches immediately the a = a + 2; statement, giving 7 as a final value.

And yes the compiler is smart enough to compile the 'missing-else-clause' if statement.

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: Beginner's Question

UKM_Student11-Sep-09 3:19

UKM_Student

11-Sep-09 3:19

Thanks for the lovely examples ^_^

Re: Beginner's Question

UKM_Student11-Sep-09 3:32

UKM_Student

11-Sep-09 3:32

i got one more question to ask,but i'll try to figure this one out first xD

Thanks again to all who helped me Smile | :)

Detecting identical path names

Mattias G11-Sep-09 1:08

Mattias G

11-Sep-09 1:08

Is there an Win32 API call for detecting different ways of naming the same physical file? That "X:\projects\test\..\work\ch~1.gif" and "\\Tyrus\MyShare\projects\WORK\Cha-Cha-Cha.gif" actually refer to the same physical file? Checked PathXXX but no luck there.

Re: Detecting identical path names

Randor 11-Sep-09 1:30

Randor

11-Sep-09 1:30

Hi Mattias,

Try using the WNetGetConnection Function[^] to get the name of the network resource associated with drive "X:"

Hopefully it returns "\\Tyrus\MyShare\"

Best Wishes,
-David Delaune

Re: Detecting identical path names

Mattias G11-Sep-09 1:36

Mattias G

11-Sep-09 1:36

Thanks, I'll see what I can make of WNetGetUniversalName (promising name)

Re: Detecting identical path names

Randor 11-Sep-09 1:40

Randor

11-Sep-09 1:40

Excellent! I didnt even know that function existed. Big Grin | :-D

Best Wishes,
-David Delaune

Re: Detecting identical path names [modified]

Mattias G11-Sep-09 2:07

Mattias G

11-Sep-09 2:07

I didn't even know there was a group of calls starting with WNetXXXXX... Anyway, WNetGetUniversalName did half the trick converting X: into \\Tyrus\share, but that call won't help me with short/long names, or upper/lower case, or relative paths. Was hoping for something like ArePathsReferringToTheSameFile, but will manage with the above and PathMakePretty or similar.

[edit]
Turns out that WNetGetUniversalName wasn't that perfect for my purpose, as it can't handle paths that are local paths (not on a network resource at all). Fixed by using PathIsNetworkPath, but I would rather not do all these conversions and checks manually...

modified on Friday, September 11, 2009 8:28 AM

Re: Detecting identical path names

David Crow11-Sep-09 3:40

David Crow

11-Sep-09 3:40

Mattias G wrote:
...but that call won't help me with short/long names, or upper/lower case...

See GetLongPathName(), GetShortPathName(), and StrCmpI().

"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

"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

Re: Detecting identical path names

Randor 13-Sep-09 0:19

Randor

13-Sep-09 0:19

Hi Mattias,

It is the weekend and I am working on some personal projects. A thought occured to me while working on a CMFCShellTreeCtrl[^] derived class. The Explorer shell internally uses PIDL identifier lists[^] to uniquely identify files and folders. It should be possible to obtain a PIDL of both files and compare them for equality.

Anyway, I thought of your post while working with PIDL. I guess its another option for you to consider.

Best Wishes,
-David Delaune

Re: Detecting identical path names

Member 419459314-Sep-09 9:21

Member 4194593

14-Sep-09 9:21

You can do what JkDefrag does when evaluating paths for mount points etc. Get the short path and short name (to eliminate the relative paths), then get the long path and name. Do this for both files, then either do a case insensitive compare of the long path/name strings, or force the path/file strings to lower or upper case before the compare.

Dave.

Re: Detecting identical path names

Mattias G14-Sep-09 22:53

Mattias G

14-Sep-09 22:53

Thanks for the input. Have been trying IShellItem::Compare, but can't get that to work unless files on the same share are specified the same way (\\share\path or X:\path). IShellItem::Compare can handle differences in case, however. I'm using SHCreateShellItem to create the objects, and that call fails if I'm using a relative path such as \\share\bohoo\tada\..\tada\file.txt. As always, this could be due to user incompetence on my side, so feel free to check this one for errors:

// ...
PIDLIST_ABSOLUTE pid1; 
PIDLIST_ABSOLUTE pid2; 
IShellItem* itm1;
IShellItem* itm2;

pid1 = ILCreateFromPath(szPath);
SHCreateShellItem(NULL, NULL, pid1, &itm1);
ILFree(pid1);

for(unsigned i = 0; i < m_rgGlossaries.size(); i++){
	BSTR strPath;
	// ...
	pid2 = ILCreateFromPath(strPath);
	SysFreeString(strPath);
	SHCreateShellItem(NULL, NULL, pid2, &itm2);
	ILFree(pid2);
	itm1->Compare(itm2, SICHINT_ALLFIELDS, &nCmpResult);
	itm2->Release();
	if(nCmpResult == 0){
		AfxMessageBox(_T("Hurrah"));
		// ...
	}
}

// ...

Eagerly awaiting suggestions. Would prefer not to do lots of conversions and resolving on my own.

Re: Detecting identical path names

Member 419459315-Sep-09 9:31

Member 4194593

15-Sep-09 9:31

I really cannot comment on the C++ code, I am mainly a ANSI C and MASM programmer. I am currently away from my development system and my laptop has no compiler or source code. At this week's end (Friday) I will send you the JkDefrag code that is used for this.

It is interesting that JkDefrag is labled as C++ (JkDefrag.cpp), but contains only ANSI standard C coding. If you do not want to wait until Friday, Google JkDefrag 3.36 (4.0 is NOT open source), download the open source Zip, expand the Zip, and hunt for DefragOnePath in JkDefragLib.cpp.

Dave.

Re: Detecting identical path names

Randor 16-Sep-09 2:09

Randor

16-Sep-09 2:09

Hi Dave, David here.

I'm curious as to why you believe JkDefrag source code will solve this problem?

1.) JkDefrag uses DeviceIOControl to query local device drivers for NTFS-MFT and/or FAT disk cluster offsets. So he cannot possibly use these techniques for remote drives.

2.) If your eluding to the usage of GetVolumeNameForVolumeMountPoint then how will this help for non-mounted shares accessed with \\Server\\Path\\To\\File type URI? These paths do not have a mount point.

3.) If he needs to resolve relative paths into full paths he can use the GetFullPathName Function[^] and/or GetLongPathName Function[^].

So can you explain why you believe JkDefrag adds anything useful into this particular situation?

Best Wishes,
-David Delaune

Re: Detecting identical path names

Member 419459316-Sep-09 5:48

Member 4194593

16-Sep-09 5:48

David,

As I mentioned, I do not have the source with me right now, but remembered that it did resolve path/name matches by a double transform (trying to match a path name with a mask containing wild cards including the case where a mount point when expanded to its full hardware path did match the mask).

It is true that JkDefrag will not defrag an unmounted share. I think it will not even handle a share because the API can only handle local drives. Again, I do not have the source here right now, so can't check.

Dave.

Is There a way to set WS_EX_RTLREADING style only to some columns of ClistCtrl

A&Ms11-Sep-09 0:34

A&Ms

11-Sep-09 0:34

Consider the code below:

CListCtrl* list;
list->SetView(LV_VIEW_DETAILS);
list->InsertColumn(0,_T("en"),LVCFMT_LEFT ,30,0);
list->InsertColumn(1,_T("fa"),LVCFMT_RIGHT,30,0);
list->ModifyStyleEx(NULL,WS_EX_RTLREADING);

this code make the Whole CListCtrl in Right to Left Reading Order Mode.
But I want to have only the secound column in this mode?
What should I do? D'Oh! | :doh:

visual studio WINAPI directive

FotisSs11-Sep-09 0:15

FotisSs

11-Sep-09 0:15

Hi guys I have the following problem when I insert the WINAPI calling convention while exporting a function
for example __declspec(dllexport) VOID ServiceMain(DWORD dwArgc, LPTSTR *lpszArgv); the Visual Studio compiler exports the function in the dll as _ServiceMain@8 while without the WINAPI the ServiceName is exported like ServiceMain.

Why is this happening??

Re: visual studio WINAPI directive

CPallini11-Sep-09 0:51

CPallini

11-Sep-09 0:51

See, for instance, here.
Smile | :)

Re: visual studio WINAPI directive

Stuart Dootson11-Sep-09 1:02

Stuart Dootson

11-Sep-09 1:02

It's because the different conventions place the requirement of cleaning parameters off the stack on different entities.

See this Wikipedia entry[^] - WINAPI implies stdcall (callee clean-up), so the caller needs to be told how much stack the called function will clean up - that's what the '@8' at the end of the ServiceMain symbol indicates.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

How to make image in a rich edit?

mr bard210-Sep-09 23:42

mr bard2

10-Sep-09 23:42

i just want includes image in the rich edit...
like a braille image...how can i do it??
and how can i set the key S+d for the image a, key D+F+S for image b and so on...

Re: How to make image in a rich edit?

Mattias G11-Sep-09 1:01

Mattias G

11-Sep-09 1:01

You can stream images into a RTF control, if you encode the image according to the RTF spec. I don't understand what "S+d" and "D+F+S" refers to, could you please elaborate?

Re: How to make image in a rich edit?

mr bard211-Sep-09 23:39

mr bard2

11-Sep-09 23:39

i wanted to set...if i push the key s+D+f means that three key i enter at the same times...how to set its??

Re: How to make image in a rich edit?

Nuri Ismail11-Sep-09 2:29

Nuri Ismail

11-Sep-09 2:29

Here[^] is an example of inserting images and other OLE objects in Rich Edit Control.

mr bard2 wrote:
how can i set the key S+d for the image a, key D+F+S for image b and so on...

This part of your question is totally unintelligible for me... What are these keys and what they have to do with the images?

If you want useful answers you should try to be accurate and specific in explanation of your problems. Wink | ;)

Regards
Nuri Ismail

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