C / C++ / MFC

4-Mar-07 21:32

Hi all,

I have the following class, with structure and function:

class CIniFile
{
public:
	struct Record
	{
		string Comments;
		char Commented;
		string Section;
		string Key;
		string Value;
	};
        static vector<Record> GetSection(string SectionName, string FileName);

So now I call the function:

vector<CIniFile::Record> s = CIniFile::GetSection("Client Files",IniFileName);

My question is how can convert s to a string ?? Or is there another way of getting it to a string or char*.
Many Thanx
Regards,

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r
My Blog: ^_^

prasad_som4-Mar-07 21:40

4-Mar-07 21:40

Programm3r wrote:
My question is how can convert s to a string ??

Can you explain a little clearer ?
Do you want to know , how to access members of Record in the class ?

Prasad
Notifier using ATL | Operator new[],delete[][^]

Programm3r4-Mar-07 21:50

4-Mar-07 21:50

prasad_som wrote:
Do you want to know , how to access members of Record in the class ?

Yes, but I think I solved the problem thanx prasad_som.... Cool | :cool:

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r
My Blog: ^_^

prasad_som4-Mar-07 21:51

4-Mar-07 21:51

Programm3r wrote:
problem

Prasad
Notifier using ATL | Operator new[],delete[][^]

Programm3r4-Mar-07 21:40

4-Mar-07 21:40

Sorry stupid question ...

std::string v = s[0].Value;

Thanx anyway .... D'Oh! | :doh:

Regards,

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r
My Blog: ^_^

error LNK2019

Programm3r4-Mar-07 23:35

4-Mar-07 23:35

Hi all,

When I call the function in my dll, I receive the following error:

Error 39 error LNK2019: unresolved external symbol "public: static class std::vector<struct cinifile::record,class="" std::allocator<struct="" cinifile::record=""> > __cdecl CIniFile::GetSection(class std::basic_string<char,struct std::char_traits<char="">,class std::allocator<char> >,class std::basic_string<char,struct std::char_traits<char="">,class std::allocator<char> >)" (?GetSection@CIniFile@@SA?AV?$vector@URecord@CIniFile@@V?$allocator@URecord@CIniFile@@@std@@@std@@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@3@0@Z) referenced in function "public: bool __thiscall TCP32CLIENT::setApplicationParameters(void)" (?setApplicationParameters@TCP32CLIENT@@QAE_NXZ) TCP32Client.obj

What am I doing wrong ?? Confused | :confused:

Many thanx
Regards,

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r
My Blog: ^_^

Re: error LNK2019

Programm3r4-Mar-07 23:58

4-Mar-07 23:58

It seems like I forgot to export the function in the other dll (in the def file), but it's working now ....

Thanx anyway
Regards,

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r
My Blog: ^_^

Re: error LNK2019

prasad_som4-Mar-07 23:58

4-Mar-07 23:58

Do you mean , this function is in dll and you are using it ?
You need to link its .lib in to client lib,. Have you dont this ?

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: error LNK2019

Programm3r5-Mar-07 0:10

5-Mar-07 0:10

Yes, I have already link the lib file. It's actually one dll calling another, but in the one dll I forgot to export one of the functions. When I changed the dll so that it exports the function everything seems to be working. But thanx alot for your input prasad.

Regards,

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r
My Blog: ^_^

corruption of the heap

Programm3r5-Mar-07 0:41

Re: corruption of the heap

5-Mar-07 0:41

Ok, it's like problems are following me today ....
I keep receiving a "corruption of the heap" error.
dbgdel.cpp

_free_dbg( pUserData, pHead->nBlockUse );

pBlockHeaderNext = 0x003a6be0 {pBlockHeaderNext=0x003a3718 pBlockHeaderPrev=0x003a6600 szFileName=0x00000000 <bad ptr=""> ...}
pBlockHeaderPrev = 0x00000000 {pBlockHeaderNext=??? pBlockHeaderPrev=??? szFileName=??? ...}
gap = 0x003a661c "ýýýýtransactions.txt"

Disassembly

_free_dbg( pUserData, pHead->nBlockUse );
10040BE7 mov edx,dword ptr [ebp-1Ch]
10040BEA mov eax,dword ptr [edx+14h]
10040BED push eax
10040BEE mov ecx,dword ptr [ebp+8]
10040BF1 push ecx
10040BF2 call @ILT+4355(__free_dbg) (10034108h)
10040BF7 add esp,8

I know there could be alot of this that might cause this, but what would be the most obvious??

Thanx again .... Sigh | :sigh:

Regards,

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r
My Blog: ^_^

prasad_som5-Mar-07 1:00

5-Mar-07 1:00

Possibley you are deleting corrupted memory. Actually, call stack should show you where it is occuring.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Programm3r5-Mar-07 1:15

5-Mar-07 1:15

The exception occurs right before my dll terminates ... the debugger refered to assert, would this make a difference?

Debug Assertion Failed!
File: dbgheap.c
Line: 1252

Expression: _CrtIsValidHeapPointer(pUserData)

For more information see the VS C++ Documentation on assert

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r
My Blog: ^_^

prasad_som5-Mar-07 1:28

5-Mar-07 1:28

Again same, its is dues to corrupting memory. One typical example would be,

char *p = new char[10];
strcpy(p,"string greater than 10");
//after use
delete []p;

char *p = new char[10];
//after use
delete []p;//not assigned null to it,
//and again
delete []p somewhere from program.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Programm3r5-Mar-07 1:38

5-Mar-07 1:38

Ok, nowhere in my program am I using the delete nor ZeroMemory functions. I'll do some serious debugging, but thanx Prasad.

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r
My Blog: ^_^

prasad_som5-Mar-07 1:41

5-Mar-07 1:41

Programm3r wrote:
program am I using the delete nor ZeroMemory functions.

Doesn't matter. It could be possible , that memory created on stack(array) is corrupted this way.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Programm3r5-Mar-07 2:02

Clearing the contents of the following... [modified]

5-Mar-07 2:02

Thanx anyway Prasad ... this bug is starting to p^ss me off ... but oh well .. I'll figure it out ..

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r
My Blog: ^_^

Programm3r5-Mar-07 2:55

Re: Clearing the contents of the following...

5-Mar-07 2:55

Hi all,

How could I clear / erase the contents of s:

class CIniFile
{
public:
	struct Record
	{
		string Comments;
		char Commented;
		string Section;
		string Key;
		string Value;
	};

vector<CIniFile::Record> s = CIniFile::GetSection("Client Files",IniFileName);

I tried the following:

s.erase(s.begin(),s.end());

Bit receive the following:
Windows has triggered a breakpoint in CompClientApp.exe.

This may be due to a corruption of the heap, and indicates a bug in CompClientApp.exe or any of the DLLs it has loaded.

The output window may have more diagnostic information
Many thanx
Regards,

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r
My Blog: ^_^

prasad_som5-Mar-07 3:24

Re: Clearing the contents of the following... [modified]

5-Mar-07 3:24

Its object, not pointer, isn't it ?

Prasad
Notifier using ATL | Operator new[],delete[][^]

Programm3r5-Mar-07 3:32

Re: Clearing the contents of the following...

5-Mar-07 3:32

Yes it's an object D'Oh! | :doh:

, but it is as if the function call that I do (mentioned earlier) causes the problem.

I do the function call and afterwards i do this:

vector<CIniFile::Record> s = CIniFile::GetSection("Server Files",IniFileName);
char *SendFiles[10];
for (int i=0;i<10;i++)
{
 SendFiles[i] = "";
 lpzFiles[i].szFileName = "";
}
for (int x = 0 ; x < s.size() ; x++)
{
 lpzFiles[x].szFileName = (char*)s[x].Value.c_str();
 SendFiles[x] = lpzFiles[x].szFileName;					
}

And as the function returns a value or exits, the problem occurs ...
I really give up bro ... Cry | :((

-- modified at 10:00 Monday 5th March, 2007

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r
My Blog: ^_^

prasad_som5-Mar-07 3:39

Re: Clearing the contents of the following... [modified]

5-Mar-07 3:39

Programm3r wrote:
lpzFiles[i].szFileName = "";

How is lpzFiles is declared like ?

Prasad
Notifier using ATL | Operator new[],delete[][^]

Programm3r5-Mar-07 3:43

Re: about DLL loading [modified]

5-Mar-07 3:43

#define FILE_NAMES 10
struct
{
	char* szFileName;
}lpzFiles[FILE_NAMES];

It's as if the stack of that specific portion of code gets corrupted (that is the function call)

-- modified at 9:52 Monday 5th March, 2007

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r
My Blog: ^_^

about DLL loading

mt_samiei4-Mar-07 21:26

mt_samiei

4-Mar-07 21:26

Dear all
I write one small DLL that I need to load it only one time.
How can I protect my dll from loading twice or more at load time.
I use LoadLibrary function to load my dll in dynamic manner.
How can I load this DLL in static manner.
Thanks in advance
Mahdi

prasad_som4-Mar-07 21:47