C / C++ / MFC Discussion Boards

Re: VS2005 using ATL when it's not set

hairy_hats1-Feb-10 0:54

hairy_hats

1-Feb-10 0:54

A variety of linker errors for missing ATL trace symbols and

unresolved external symbol "public: void __thiscall ATL::COleDateTime::SetStatus(enum ATL::COleDateTime::DateTimeStatus)" (?SetStatus@COleDateTime@ATL@@QAEXW4DateTimeStatus@12@@Z) referenced in function "public: int __thiscall CADORecordset::GetFieldValue(char const *,class ATL::COleDateTime &)" (?GetFieldValue@CADORecordset@@QAEHPBDAAVCOleDateTime@ATL@@@Z)

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Re: VS2005 using ATL when it's not set

KingsGambit1-Feb-10 5:45

KingsGambit

1-Feb-10 5:45

Sorry Stevte, I could not figure out the exact reason for this error. I tried a consol app + COleDateTime in VS 2005 without ATL. It is working fine for me.
By the way are you mixing older (6.0) libraries and the new 2005 libraries?

Re: VS2005 using ATL when it's not set

hairy_hats1-Feb-10 5:57

hairy_hats

1-Feb-10 5:57

It's a project I converted from VC6. Irritatingly if I don't omit out a library (atlsd.lib) I get things missing but if I leave it in I get multiple definitions. Maybe I just need to create a blank project and add the files to it.

I hope you realise that hamsters are very creative when it comes to revenge. - Elaine

Re: VS2005 using ATL when it's not set

Jonathan Davies1-Feb-10 1:07

Jonathan Davies

1-Feb-10 1:07

Post 2002 COleDateTime became a MFC/ATL shared class which is probably the cause of your problem. See http://msdn.microsoft.com/en-us/library/ekdt199a(VS.80).aspx[^]

Re: VS2005 using ATL when it's not set

hairy_hats1-Feb-10 1:14

hairy_hats

1-Feb-10 1:14

Thanks Jonathan, that looks likely. Does that mean I have to link the ATL library to an MFC project to use the shared classes?

I hope you realise that hamsters are very creative when it comes to revenge. - Elaine

Re: VS2005 using ATL when it's not set

Jonathan Davies1-Feb-10 1:25

Jonathan Davies

1-Feb-10 1:25

Hi Steve,
I'm afraid I'm not sure what you'll have to do though as its a shared class I'd expect you'd link to some Shared library but I'm not sure what that would be now. A common shared class is CString as there's is/was both ATL/WTL and MFC versions before they became shared. It may mean you just have to scope your call with MFC:: or add some #pragma statement of some sort. I'm pretty sure there were whole articles written on how to get around similar problems raised by the sharing of CString so it may be worth your while having a look at one of those. Sorry I can't be of more help.
Jonathan

Looking up return types and function attributes(in/out parameters) from PE file format

glitteringsound31-Jan-10 21:06

glitteringsound

31-Jan-10 21:06

Hello,
As we know that we can extract information like imported/exported functions after parsing PE file programatically.
But we can only take the names (function names imported/exported) of methods. We cannot look up their parameters(in/out)names with their types and return type of method.(as these parts encoded as HEX)

Is there any way out to extract these as well..?

Regards Muhammad Usman Khalil

Re: Looking up return types and function attributes(in/out parameters) from PE file format

Stephen Hewitt31-Jan-10 23:02

Stephen Hewitt

31-Jan-10 23:02

In general, no. If the names are mangled (see name mangling[^]) it's possible however.

Steve

Re: Looking up return types and function attributes(in/out parameters) from PE file format

Stuart Dootson1-Feb-10 3:07

Stuart Dootson

1-Feb-10 3:07

In addition to the other answer - if your executable has debug information associated with it, it is possible to extract full information about function argument and return types.

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Re: Looking up return types and function attributes(in/out parameters) from PE file format

glitteringsound1-Feb-10 3:13

glitteringsound

1-Feb-10 3:13

How..?
Is that that info(info regarding return type and parameters) of method reside in PE file still..?
If yes then which area need to parse of PE to get such info(regarding return type,in/out params of method)
Regards
Usman

Re: Looking up return types and function attributes(in/out parameters) from PE file format

Stuart Dootson1-Feb-10 3:26

Stuart Dootson

1-Feb-10 3:26

Don't parse the PE file directly - use Microsoft's DbgHelp API[^]. That'll cope even when the debug information's been split into a separate PDB file.

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How can find virus activity problem in client-server application?

Le@rner31-Jan-10 18:36

Le@rner

31-Jan-10 18:36

Hi all,

i m working on client server type application.

using socket to communicate between client and server.

Symantec antivirus detect a virus activity and display like this.

Symantec == Suspicious.Insight

please tell me how can i find out the main reasons for this and resolve this.

thanks.

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not only plan, but also believe.

Re: How can find virus activity problem in client-server application?

Moak31-Jan-10 23:21

Moak

31-Jan-10 23:21

Perhaps you should ask the Symantec forum: http://www.symantec.com/connect/forums[^].

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How to config RAID in C++ with my own APP instead of using MS disk manager?

terrysir31-Jan-10 16:33

terrysir

31-Jan-10 16:33

I've got a RAID project to run into.
As you know, MS disk manager provides soft RAID managment such as creating RAID disk array and reconstructing disk image on RAID0 RAID1 RAID5.
Is there any API or DEVICEIOCONTROL code in C++ so I can manage RAID in my APP instead?

A pointer of variable or a function?

fitatc31-Jan-10 13:55

fitatc

31-Jan-10 13:55

There is a macro _countof, the define is

template <typename _CountofType, size_t _SizeOfArray>
char (*__countof_helper(UNALIGNED _CountofType (&_Array)[_SizeOfArray]))[_SizeOfArray];
#define _countof(_Array) sizeof(*__countof_helper(_Array))

It confuse me that __countof_helper is a very weird pointer.
At first glance, I thought it is a pointer of array, but, how can an variable can have an "()" suffix???

Re: A pointer of variable or a function?

loyal ginger31-Jan-10 14:47

loyal ginger

31-Jan-10 14:47

It's a template of a function pointer array.

Re: A pointer of variable or a function? [modified]

fitatc31-Jan-10 15:11

fitatc

31-Jan-10 15:11

shouldn't a function pointer's size be 4?
how can a sizeof(*funcPtrArray(param)) turn out to be some relation with ReturnValTypeSize

modified on Sunday, January 31, 2010 9:20 PM

Re: A pointer of variable or a function?

Graham Breach31-Jan-10 21:10

Graham Breach

31-Jan-10 21:10

It declares a function that takes an array and returns an array of char with the same number of elements. The sizeof operator acts on the returned array to give the number of elements.

Re: A pointer of variable or a function?

fitatc31-Jan-10 21:15

fitatc

31-Jan-10 21:15

This makes sense. Thank you very much Smile | :)

Test whether iostream is binary or plain text

Skippums31-Jan-10 10:18

Skippums

31-Jan-10 10:18

I would like to test whether a stream was opened for binary read/writes or for plain text. The goal of my code is to output the data in a MyClass object in two different ways depending on this stream property.

class MyClass {
    friend ostream& operator <<(ostream& stream, const MyClass& obj);
    friend istream& operator >>(istream& stream,       MyClass& obj);
}
ostream& operator <<(ostream& stream, const MyClass& obj) {
    // How do I do the following?
    if ([stream is opened for binary writes]) {
        ...
    } else {
        ...
    }
}
istream& operator >>(istream& stream,       MyClass& obj) {
    // How do I do the following?
    if ([stream is opened for binary reads]) {
        ...
    } else {
        ...
    }
}

Would doing such a thing be poor design, or is this pretty acceptable? Thanks,

Sounds like somebody's got a case of the Mondays

-Jeff

Re: Test whether iostream is binary or plain text

Rozis31-Jan-10 12:00

Rozis

31-Jan-10 12:00

First: A stream is not binary or plain text, it is: do i want to treat incoming bytes as binary or as plain text. It is perfectly legal to open a stream containing plain text as binary. Next: you must open a stream with a flag that tells how you want to open it, so you already know if it's binary or not. Ergo: there's no need to test this.

But i guess i'm completely missing the point...

Re: Test whether iostream is binary or plain text

Skippums31-Jan-10 12:44

Skippums

31-Jan-10 12:44

Ok, let me rephrase... one of the members of MyClass is an array. If the user wants to output my class in a human-readable form, I want to print the array as "[elem1, elem2, ... elemN]". If not, then I want to output the array length followed by each element in a binary representation. Now, when someone tries to output my class as "cout << MyClassInstance", it should be the human-readable version. When serializing the class to a file for later reloads, I want to output the binary version. How can I infer which version to use? I could conceivably write a specific implementation for ifstream and ofstream so I always read/write the non-human-readable version to a file, but that isn't really what I am trying to do. I could also write a specific method to serialize vs. just outputting my class, but again, I don't know what the standard way of doing this is. Thanks for any insight,

Sounds like somebody's got a case of the Mondays

-Jeff

Re: Test whether iostream is binary or plain text [modified]

BonshatS1-Feb-10 2:26

BonshatS

1-Feb-10 2:26

std::ios_base::open_mode can tell you how the file stream was opened. The values are listed in xiosbase.h [edit] in VS.

modified on Monday, February 1, 2010 8:42 AM

Re: Test whether iostream is binary or plain text

Skippums29-Oct-10 14:48

Skippums

29-Oct-10 14:48

After reading your post, I assumed that I could just use the statement:

bool const isBinary = ((out.flags() & ios_base::binary) != 0);

However, after testing this it appears that the ios_base::open_mode is not stored in the return value of "ostream::flags()". I have been unable to figure out how to get something from an ostream object that tells me the ios_base::open_mode used. Any idea how to extract this information after the file has been opened? Thanks,

Sounds like somebody's got a case of the Mondays

-Jeff

Re: Test whether iostream is binary or plain text

BonshatS29-Oct-10 16:50

BonshatS

29-Oct-10 16:50

Wow. 9 months later. Internet been a bit slow?

I'm sorry, I also incorrectly assumed the mode would be accessible somewhere within the stream obj.

Other than scanning the array data for CR,LF combos, or trying different read/write modes and seeing what fails and what succeeds, I don't how to determine how the stream was opened.

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