Re: C++ File system - C / C++ / MFC Discussion Boards

Re: fatal error C1001: INTERNAL COMPILER ERROR

Abhi Lahare16-Dec-09 3:09

16-Dec-09 3:09

I got this error few days back (because of code base is complied from mapped network drive)
Once network was OK, Rebuilt and done.
.
HTH
Abhi

Re: fatal error C1001: INTERNAL COMPILER ERROR

Fatbuddha 116-Dec-09 5:55

Fatbuddha 1

16-Dec-09 5:55

No prob, I just thought you might have not.
http://support.microsoft.com/kb/195738[^]

This was just the first hit that I got and I thought it might help.

Cheers

You have the thought that modern physics just relay on assumptions, that somehow depends on a smile of a cat, which isn’t there.( Albert Einstein)

Re: fatal error C1001: INTERNAL COMPILER ERROR

22491716-Dec-09 12:00

224917

16-Dec-09 12:00

Remember facing this before, but can't recall how did it got resolved Frown | :(

. Can you try cleaning up the temp files/folder using CCleaner?

-Suhredayan

Re: fatal error C1001: INTERNAL COMPILER ERROR

wangningyu20-Dec-09 5:00

wangningyu

20-Dec-09 5:00

I tried ,but failed too...

If I update the Platform SDK Windows Server 2003 R2 ,isn't again ?

C++ File system

hrishiS16-Dec-09 1:13

hrishiS

16-Dec-09 1:13

Hi to All,

I have 4 rows of data has to be saved in a binary file system . I haven't use it before, Can anyone please help me with this

EG:

struct A
{
int a1;
int a2;
}

struct B
{
int b1;
int b2;
}

struct C
{
int c1;
int c2;
}

How do I write and read this values from the file system??

-----------------------------
I am a beginner

Re: C++ File system

CPallini16-Dec-09 1:53

CPallini

16-Dec-09 1:53

You may simply store the structs as row, binary data. For instance (error checking left to the reader):

struct A
{
   int a1;
   int a2;
};

A a;

FILE * fp = fopen("data.raw", "wb");

fwrite(&a, sizeof(a), 1, fp);
//..
fclose(fp);
//..

For an object oriented approach see Object Serialization [^](for instance MFC framework supports it).

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: C++ File system

hrishiS16-Dec-09 2:16

hrishiS

16-Dec-09 2:16

thanks for your reply.

But my problem is I have more then 2 structure and I need to search or write at runtime.

-----------------------------
I am a beginner

Re: C++ File system

CPallini16-Dec-09 2:36

CPallini

16-Dec-09 2:36

You may do a step toward serialization, storing type info just before actual data, for instance:

enum SER_TYPES
{
  eTypeI,
  eTypeD,
  //..
};

struct I
{
   int i1, i2;
};
struct D
{
   double d1, d2, d3;
};
// ..

void store(FILE *fp, I * pi)
{
  int t = eTypeI;
  fwrite( &t, sizeof(int), 1, fp); // first write type
  fwrite( pi, sizeof(*pi), fp); // then write data
}
void store(FILE *fp, D * pd)
{
  int t = eTypeD;
  fwrite( &t, sizeof(int), 1, fp); // first write type
  fwrite( pd, sizeof(*pd), fp); // then write data
}

int main()
{
  FILE * fp = fopen("data.raw", "wb");
  I i,j;
  D d,f;
  //..
  store(fp,i);
  store(fp,d);
  store(fp,j);
  //..
}

On reading, you've to first read the type of the stored data and then, according to the type, read the actual data.
Smile | :)

Re: C++ File system

hrishiS16-Dec-09 2:48

hrishiS

16-Dec-09 2:48

thanks ,

that's the exact one i was looking for...In fact I dont have knowledge on serialization, But i have also reached t that point..Now I am having problem on reading...
just for ur information.....my incomplete code is given below
I have used class instead of struct

class tableSructureUnknown
{
};
class tableSructure1: public tableSructureUnknown
{
public:
     int x;
     int y;
};
class tableSructure2: public tableSructureUnknown
{
public:
     int x2;
     int y2;
};

class listTable
{
public:
     int id;
     int size;
     char tName[20];
};

listTable ArrTableInfo[]=
{
     {TFX_TABLE1,sizeof(tableSructure1), "first"},
     {TFX_TABLE2,sizeof(tableSructure2),"Second"},
     {TFX_UNKNOWN,0,"Unknown"}
};

FILE *ptr_myfile;
int writeToFileTable(int tableId,tableSructureUnknown *lpbaseTableClass)
{
     ptr_myfile=fopen("test.bin","w");
     if (!ptr_myfile)
     {
          printf("Unable to open file!");
          return 1;
     }
     for(int i = 0;   (ArrTableInfo[i].id != TFX_UNKNOWN) || (ArrTableInfo[i].id != tableId) ;i++)
     {
          fwrite(&ArrTableInfo[i], sizeof(listTable), 1, ptr_myfile);
          ptr_myfile=fopen("test.bin","w");
          if (!ptr_myfile)
          {
               printf("Unable to open file!");
               return 0;
          }
          fwrite(&lpbaseTableClass, ArrTableInfo[i].size , 1, ptr_myfile);
          break;
     }
     fclose(ptr_myfile);
     return 1;
}
tableSructureUnknown* ReadFromFileTable(int tableId)
{
     for(int i = 0;   (ArrTableInfo[i].id != TFX_UNKNOWN) || (ArrTableInfo[i].id != tableId) ;i++)
     {
     }
     tableSructureUnknown* temp     =     NULL;
     return temp;
}

int main(int argc, char* argv[])
{
tableSructure1 Mytable1;
Mytable1.x = 1;
Mytable1.y = 11;
tableSructureUnknown *lpbaseTableClass = &Mytable1;
writeToFileTable(TFX_TABLE1,lpbaseTableClass);

tableSructure2 Mytable2;
Mytable2.x2 = 2;
Mytable2.y2 = 22;
lpbaseTableClass = &Mytable2;
writeToFileTable(TFX_TABLE1,lpbaseTableClass);

-----------------------------
I am a beginner

Call a function from another class

Paulraj G16-Dec-09 0:22

Paulraj G

16-Dec-09 0:22

I have 2 classes.

Class A:

void CDbModReactor::objectModified(const AcDbDatabase* pDb,
                                  const AcDbObject* pDbObj)
{
	AcAxDocLock docLock(pDbObj->ownerId(), AcAxDocLock::kNormal);	

	if(docLock.lockStatus() != Acad::eOk)
		return;
        else
		gpDlg->OnCopy2Excell("modified", pDbObj);
}

Class B:

void CSampDialog::function1() 
{

	FILE * pFile;
		pFile = fopen ("C:myfile.csv","a");
		if (pFile!=NULL)
		{
    
		CString x2 = Cent_X+","+Cent_Y+"\n";
		fwrite(x2, x2.GetLength(), 1, pFile);
		fclose (pFile);
		}
}

Now i have to call the function void CDbModReactor::objectModified(const AcDbDatabase* pDb, const AcDbObject* pDbObj) from void CSampDialog::function1()

How can i call...

Please help me...

G.Paulraj

Re: Call a function from another class

Richard MacCutchan16-Dec-09 0:39

Richard MacCutchan

16-Dec-09 0:39

Paulraj G wrote:
How can i call..

Create an instance of the CDbModReactor class and call the function as required. This is basic C++, and if you do not understand how to do it you may need to go back to your learning materials.

Re: Call a function from another class

Paulraj G16-Dec-09 1:00

Paulraj G

16-Dec-09 1:00

Hi...

Thanks for your reply.

This is the basic thing that i know.

but i don't have variable to pass from here.

if i call the function like

CDbModReactor cdbmod;
cdbmod.objectModified();

that shows error. also i have tried like

CDbModReactor cdbmod;
cdbmod.objectModified(pDb, pDbObj);

i don't have variables. that is the problem.
with out variables how can i call the function?

G.Paulraj

Re: Call a function from another class

WoutL16-Dec-09 1:18

WoutL

16-Dec-09 1:18

You cannot call the function without variables.

Wout Louwers

Re: Call a function from another class

Paulraj G16-Dec-09 1:20

Paulraj G

16-Dec-09 1:20

ok...

G.Paulraj

Re: Call a function from another class

Richard MacCutchan16-Dec-09 1:18

Richard MacCutchan

16-Dec-09 1:18

Like I said before, I think you need to go back to learning the basics of classes and objects. Your call to cdbmod.objectModified() needs to pass the parameters required by that method.

Re: Call a function from another class

Nelek16-Dec-09 5:35

Nelek

16-Dec-09 5:35

In your own code...

gpDlg->OnCopy2Excell("modified", pDbObj);

That seems to me as a external call from your class "CDBModReactor" to the class pointed by "gpDlg" containing the function "OnCopy2Excell", so... if this is like that... you have answered your question by yourself. (Supposing you have written the code)

Regards.
--------
M.D.V. Wink | ;)

If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
“The First Rule of Program Optimization: Don't do it. The Second Rule of Program Optimization (for experts only!): Don't do it yet.” - Michael A. Jackson
Rating helpfull answers is nice, but saying thanks can be even nicer.

Choosing of STL container

hrishiS15-Dec-09 23:35

hrishiS

15-Dec-09 23:35

Hi to All,

Could anyone please help me choosing the best STL container to Hold a table (DB table)...

Thanks in advance,

-----------------------------
I am a beginner

Re: Choosing of STL container

Adam Roderick J16-Dec-09 0:05

Adam Roderick J

16-Dec-09 0:05

That depends on your need
well my suggestions are:-
I think stl map [^] will be very well suited, if you have a lot searching operations.
Since it is DB table, i think it may be need to have a lot of searching.

But if you have add a lot element and no need for searching then list will be better [^].

Величие не Бога может быть недооценена.

Re: Choosing of STL container

hrishiS16-Dec-09 0:52

hrishiS

16-Dec-09 0:52

thanks,

Now, after reading from database I need to put the data of a small table in a file system...please provide some hints to do that...

-----------------------------
I am a beginner

Re: Choosing of STL container

Jonathan Davies16-Dec-09 0:06

Jonathan Davies

16-Dec-09 0:06

I'm sure it's not the answer you wanted, but It depends upon your data. It also depends upon how you want to use that data. Start by having a look at something that describes the STL Container types and see if it gives any clues. Is there a reason why you want to put the data in a container?

Re: Choosing of STL container

hrishiS16-Dec-09 0:52

hrishiS

16-Dec-09 0:52

I got my answer, depending on the need i guess i will go for map

thanks,

Now, after reading from database I need to put the data of a small table in a file system...please provide some hints to do that...

-----------------------------
I am a beginner

Re: Choosing of STL container

CPallini16-Dec-09 0:08

CPallini

16-Dec-09 0:08

It really depends on how you want to access table items.
Yuo may, for instance use a vector of struct, where each struct contains one row.
Smile | :)

Re: Choosing of STL container

KingsGambit16-Dec-09 1:00

KingsGambit

16-Dec-09 1:00

Often you will have to combine multiple containers as per your requirements. For example to create a 2D array you can use a vector or vectors

vector< vector<int> > a;

Threads and Sockets

giancoitaly15-Dec-09 21:56

giancoitaly

15-Dec-09 21:56

Hi all,
I have a problem with sockets inside a thread: it seems the socket object is not working inside the thread.

I'm using a Socket library found on the net and the "socket.h" library from windows.

This code works:

<br />
SocketClient s(ServerAdress, ServerPort);<br />
s.SendLine("aaa");<br />
while (1) <br />
{<br />
  string l = s.ReceiveLine();<br />
  if (l.empty()) break;<br />
  cout << l;<br />
   cout.flush();<br />
}<br />

Now I'm trying to do the same thing in a thread... I have a function:

<br />
void Answer(void* param) <br />
{  <br />
  SocketClient* ps = (SocketClient*)param;<br />
  ps->SendLine("GET / HTTP/1.0");<br />
  ps->SendLine("Host: www.google.com");<br />
  ps->SendLine("");<br />
<br />
  while (1) <br />
  {<br />
    string l = ps->ReceiveLine();<br />
    if (l.empty()) break;<br />
    cout << l;<br />
    cout.flush();<br />
  }<br />
  delete ps;<br />
} <br />

And I call it in this way:

<br />
_beginthread(Answer, 0, &s);<br />

All is compiling fine, but then the Socket inside the thread seems to be useless, it doesn't do nothing.

Can anyone explain me how to pass object between threads?

Is there a possibility to pass them without pointers?

I'm quite new in C++ and I found nothing on the net so far.

Thanks!
gianca

Re: Threads and Sockets [modified]

Adam Roderick J15-Dec-09 23:31

Adam Roderick J

15-Dec-09 23:31

why you think that, thread is useless?

You can pass a object as static object instead of pointer, but remember that it can modified from any thread.
Just refer this article [^]

It is correct to send object as pointer to a thread, but always check carefully on delete. Ensure that it should be deleted only after exit of thread.

Величие не Бога может быть недооценена.

modified on Wednesday, December 16, 2009 6:23 AM

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