C / C++ / MFC Discussion Boards

LukeV12-Feb-03 6:18

12-Feb-03 6:18

I have to parse a CSV file, make changes to it and then re-write to another file... The CSV part is ok, but when I use \r in CStrings, I get a "block" character.. I know it is ok but if I view it in Notepad or any other file viewer, there won't be any carriage returns, just those characters representing the \r...

Why is that?

Thanks!

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Re: CString and \r question

Alvaro Mendez12-Feb-03 6:44

Alvaro Mendez

12-Feb-03 6:44

In Windows, \r needs to be paired with \n to give you the carriage return. So use "\r\n".

Regards,
Alvaro

All you need in this life is ignorance and confidence, and then success is sure. -- Mark Twain

Re: CString and \r question

Mike Nordell12-Feb-03 6:55

Mike Nordell

12-Feb-03 6:55

LukeV wrote:
if I view it in Notepad or any other file viewer, there won't be any carriage returns, just those characters representing the \r...

That is expected.

In MS-DOS, and derived stuff like Win32, the EOL sequence is CRLF. Either CR or LF alone is just an unprintable control character, much like BEL or anything else !isprint().

menu messaging problem

brigham_young12-Feb-03 5:34

brigham_young

12-Feb-03 5:34

In my app, I have an MDI window but when I close all its child windows, all the menu items in the default window for the parent frame are disabled, even though I have message handlers for them in that frame's class. Any ideas of what is going wrong and how i can work around this?

Any help would be greatly appreciated.

Ben

Re: menu messaging problem

Chris Meech12-Feb-03 5:49

Chris Meech

12-Feb-03 5:49

This is from really dusty memory, but I think with an MFC based MDI app, you have two menus. One for when there are no documents opened and another for when at least one document is opened. When you close all child windows, I think the framework will replace the menu. Since you have written handlers for the menu that is displayed when a child window is opened, these commands will be enabled. However if you have not written handlers for the menu that is displayed when no documents are opened, then these commands will be disabled. Just me guessing here.

Chris Meech

"what makes CP different is the people and sense of community, things people will only discover if they join up and join in." Christian Graus Nov 14, 2002.

"AAAAAAAAAHHHHHH!!!!! Those leaks are driving me crazy! How does one finds a memory leak in a garbage collected environment ??! Daniel Turini Nov. 2, 2002.

CRgn assertion

RalfPeter12-Feb-03 5:33

RalfPeter

12-Feb-03 5:33

I'm trying to do hit tests in a defined region using CRgn::PtInRgn(x,y) and keep getting an assertion failure message (as if the object was not instantiated). Here's the situation:

CRgn rgn;
rgn.CreateEllipticRgn(a,b,c,d);
if (something)
...if (something else)
......if (rgn.PtInRgn(x,y)) //assertion here

but

if (something)
...if (something else)
......CRgn rgn;
......rgn.CreateEllipticRgn(a,b,c,d);
......if (rgn.PtInRgn(x,y)) //no assertion this time

This is as if the CRgn object is not recognized w/in a block. Can anyone help me out? Thx,
Ralf.

ralf.riedel@usm.edu

Re: CRgn assertion

Mike Nordell12-Feb-03 6:56

Mike Nordell

12-Feb-03 6:56

The only thing I can come to think of, is that the "something" code stomps on stack memory it shouldn't.

checking to see if a folder exists

ns12-Feb-03 4:55

12-Feb-03 4:55

If the user specifies a folder and I need to make sure there is such a folder, how do I check its existence in code?

Appreciate your help,
ns

Re: checking to see if a folder exists

Roger Allen12-Feb-03 5:00

Roger Allen

12-Feb-03 5:00

I use CreateDirectory(path). if it fails with error 183, it already exists. The only draw back is that if you need to check with them if you want to create it, you already have.

Roger Allen
Sonork 100.10016

Were you different as a kid? Did you ever say "Ooohhh, shiny red" even once? - Paul Watson 11-February-2003

Re: checking to see if a folder exists

HENDRIK R12-Feb-03 5:02

HENDRIK R

12-Feb-03 5:02

A call to FindFirstFileEx (also suitable for folders) returns an error code when the specified file doesn't exist - so you can easily check the folder's validity.

Re: Many thanks!!

ns12-Feb-03 5:07

12-Feb-03 5:07

Thanks - I will try that

Appreciate your help,
ns

Re: checking to see if a folder exists

pete mcquain12-Feb-03 5:11

pete mcquain

12-Feb-03 5:11

ns wrote:
how do I check its existence in code?

I would do ::GetFileAttributesEx(strFolderPath, GetFileExInfoStandard, NULL) and check the return value and/or check ::GetLastError() for a return of 2 ("System cannot find the file specified")

-pete

Re: checking to see if a folder exists

Abin12-Feb-03 18:28

Abin

12-Feb-03 18:28

http://www.codeproject.com/file/CFileManip.asp[^]

<br />
int nRes = CFileManip::Existence(_T("c:\\somepath\\somefolder"));<br />
<br />
if (nRes == CFileManip::FM_DIRECTORY)<br />
{<br />
// this is an existing folder<br />
}<br />
else if (nRes == CFileManip::FM_FILE)<br />
{<br />
// this is an existing file<br />
}<br />
else<br />
{<br />
// the specified target does not exist<br />
}<br />

Re: checking to see if a folder exists

ns13-Feb-03 2:05

13-Feb-03 2:05

Thank you for yet another workable suggestion. I hadnt explored the file category at CP... Smile | :)

Appreciate your help,
ns

Simple question on ULONG_PTR

-Dy12-Feb-03 4:49

-Dy

12-Feb-03 4:49

I'm trying to use the ULONG_PTR type in my MFC app, but I'm getting the

error C2061: syntax error : identifier 'ULONG_PTR'

compiler error message. I've had a look in MSDN and found 'Q255556', which suggests that I'm using the wrong basetsd.h, and that I should be using the one that comes with the platform SDK. I've had a look at my include directory (Tools | Options) and I've got C:\Program Files\Microsoft Visual Studio\VC98\INCLUDE as the first directory, but still no joy with my ULONG_PTR.

Is C:\Program Files\Microsoft Visual Studio\VC98\INCLUDE the platform SDK? And does anyone know what I need to do to be able to use ULONG_PTR?

Dylan

Re: Simple question on ULONG_PTR

Pavel Klocek12-Feb-03 4:56

Pavel Klocek

12-Feb-03 4:56

You will need to install newer Platform SDK.

http://www.microsoft.com/msdownload/platformsdk/sdkupdate/default.htm[^]

Pavel
Sonork 100.15206

Re: Simple question on ULONG_PTR

Michael P Butler12-Feb-03 4:56

Michael P Butler

12-Feb-03 4:56

Dylan Kenneally wrote:
Is C:\Program Files\Microsoft Visual Studio\VC98\INCLUDE the platform SDK? And does anyone know what I need to do to be able to use ULONG_PTR?

That is the copy of the SDK that comes with VC6 and is probably out of date. If you have the platform SDK installed it'll probably be more like

C:\Program Files\Microsoft SDK\Include

Michael

Wonder Woman, Wonder Woman.
All the world's waiting for you,
and the power you possess.

In your satin tights,
Fighting for your rights
And the old Red, White and Blue.

Linking obj files from VC6 and VC7

victor.volkman@sdrc.com12-Feb-03 4:36

victor.volkman@sdrc.com

12-Feb-03 4:36

Please reply to victor.volkman@eds.com

Is there any way to compile part of a project with VC6 and part
of a project with VC7? We are suspecting a code generation bug
and it would help alot if we could pick and choose which source
files to compile with either compiler. Both compilers are
already installed and coexisting physically.

If we build an all-VC6 project and compile only a single file
with VC7, we get a linker error like this:

surf.lib(srferr.obj) : error LNK2019: unresolved external symbol "__declspec(dll
import) private: void __thiscall std::basic_string<char,struct std::char_traits<
char="">,class std::allocator<char> >::_Copy(unsigned int)" (__imp_?_Copy@?$basic_s
tring@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@AAEXI@Z) referenced in funct
ion _SurfsGetCloudNorms
surf.lib(srferr.obj) : error LNK2019: unresolved external symbol "__declspec(dll
import) void __cdecl std::_Xlen(void)" (__imp_?_Xlen@std@@YAXXZ) referenced in f
unction _SurfsGetCloudNorms
..\..\bin\iw\imageware.exe : fatal error LNK1120

Mad | :mad:

Re: Linking obj files from VC6 and VC7

C^hris L^osinger12-Feb-03 5:11

C^hris L^osinger

12-Feb-03 5:11

i think the STL has changed enough between the two versions that you can't link .obj or .libs from one to the other.

-c

Be very, very careful what you put into that head, because you will never, ever get it out. --Thomas Cardinal Wolsey

Fractals

Re: Linking obj files from VC6 and VC7

Mike Nordell12-Feb-03 7:02

Mike Nordell

12-Feb-03 7:02

victor.volkman@sdrc.com wrote:
Is there any way to compile part of a project with VC6 and part
of a project with VC7?

Yes, but almost exclusively if you use C linkage. Debug info, name mangling and especially the standard C++ library has changed enough to make it completely link-incompatible.

We are suspecting a code generation bug

Let me guess... Floating point code? Smile | :)

VC7 has quite a few documented bugs. You might want to search the archives for microsoft.public.vc.language to see if it's not something already known.

Another idea might be to tell the compiler to also generate assembly code (or even debugging in combined source/assembly) to see if the code generated is wrong or not.

++luck;

Visual Studio Profiler

Aaron Schaefer12-Feb-03 4:35

Aaron Schaefer

12-Feb-03 4:35

Anybody know how to work this thing? I have a project (an .exe) which calls a bunch of calculations that are performed in a .dll. I've got profiling working for the project, but it is only reporting info for functions declared in the .exe. I don't get any info for functions that are in the .dll.

Thanks in advance for any tips.

VC++ resource cleaner

erny12-Feb-03 4:24

erny

12-Feb-03 4:24

Hello!

Does anyone know about any sort of a utility program that can find and delete all the unused resources (bitmaps, dialogs, strings..) that have been left in the project, since everyone forgot about them?

Perhaps an add-in to the Visual Studio, or something...?

Thanks in advance!

Re: VC++ resource cleaner

Hans Ruck12-Feb-03 4:35

Hans Ruck

12-Feb-03 4:35

Michael Dunn's http://www.codeproject.com/tips/dirclean.asp[^] (shell extension).

Or http://www.codeproject.com/useritems/devplus.asp[^] (add-in) Blush | :O

rechi

Re: VC++ resource cleaner

Maximilien12-Feb-03 5:05

Maximilien

12-Feb-03 5:05

nope, that not it, those only remove temporary files from disk ( .obj, ... )

but this[^] might help.

but I haven't found something yet that does the work; I usually take a few hours here and there browing the resource.h file and the .rc file to clean up unused resources.

Max.

Re: VC++ resource cleaner

Hans Ruck12-Feb-03 5:45

Hans Ruck

12-Feb-03 5:45

Maximilien wrote:
nope, that not it

Yep, you're right, i mixed up two different problems. Dead | X|

I guess it's time to finally start the clean up of my last project resource files... Roll eyes | :rolleyes:

rechi

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