RFile Read Write Asynchronous KErrCorrupt

[muntain]

Hi all, I read another post about the problem but the problem it's bit different. I'm trying to Copy a file with read and write method of the RFile object. The files could be big (4-5MB) so I use the asynchronous method to read in a buffer and write in the other file. The problem is that the first read, or even the first write, always get me an KErrCorrupt in the RunL function. I open the files and create the buffer in the ConstructL of the class, after I start to read the source file...and I always got KErrCorrupt

[Priju Jacob Paul]

Could you post the code, and more over what priority have you set for the active object that reads the file?

Priju

[muntain]

I try with EPriorityStandard and EPriorityHigh but the problem it's the same. I try to change the source and destination directory from SD to internal memory.

I have implemented a separate class, here is some code:

void CCopyFileAsync::ConstructL()
{
CActiveScheduler::Add( this );
m_iTotBytesRead=0;
RFs& aFs=CCoeEnv::Static()->FsSession();
m_fSource.Open(aFs,_L("c:\\data\\file1.jpg"),EFileRead);
m_fDest.Replace(aFs,_L("c:\\data\\file2.jpg"),EFileWrite);
TInt iSize;
m_fSource.Size(iSize);
m_pTmpBuffer = HBufC8::NewL(iSize);
}

void CCopyFileAsync::StartCopy()
{
TPtr8 puntBuffer(m_pTmpBuffer->Des());
m_fSource.Read(m_iTotBytesRead, puntBuffer,iStatus);
SetActive();
}

void CCopyFileAsync::RunL()
{
if (iStatus == KErrNone)
{
if (m_pTmpBuffer)
{
delete m_pTmpBuffer;
m_pTmpBuffer=NULL;
}
m_fSource.Close();
m_fDest.Close();
iObserver->CopyFinish(iStatus.Int(),_L("OK"));
}else{
if (m_pTmpBuffer)
{
delete m_pTmpBuffer;
m_pTmpBuffer=NULL;
}
m_fSource.Close();
m_fDest.Close();
iObserver->CopyFinish(iStatus.Int(),_L("KO"));
}
}

When I enter in RunL I always got KErrCorrupt...
If I use the synchronous method per read and write the file it's ok.
ps. I have omitted the code for write the file because the problem it's on the first read

[muntain]

But....the question is: What does it mean KErrCorrupt? I'm reading asynchronous a file...what is corrupting?

[Priju Jacob Paul]

Hi,
Your code looks fine to me.Could you please replace the .jpg files with some small text files and test it out.Check whether that works fine, and moreover the path that you have mentioned looks a bit fishy, as i dont think there is a folder named as 'data' inside the 'c' folder? Did you happen to create that folder? Anyways, if the source path is invalid, the error code wouldnt be KErrCorrupt, probably -1 would be returned.

Priju

[muntain]

Yes c:\data is a path that I have created for some test. Now I'll try with some small file and I'll give you feedback

[muntain]

I try with another smaller file...but I got always KErrCorrupt I can't understand...

[Priju Jacob Paul]

I try with another smaller file...but I got always KErrCorrupt I can't understand...

Let me work it out here. Post you the results soon.

Priju

[muntain]

Ok, thank you for the support

[Priju Jacob Paul]

void CCopyFileAsync::StartCopy()
{
TPtr8 puntBuffer(m_pTmpBuffer->Des());
m_fSource.Read(m_iTotBytesRead, puntBuffer,iStatus);
SetActive();
}

Dude, it works fine for me here. Im able to make a replica of the image.
Let me ask you. In the above code which you had posted. puntBuffer is a TPtr8, but Read doesnt accept a TPtr8 as an argument in the second position. it looks for a TInt Length value. Didnt you get compile time errors?

Priju

[muntain]

It depend from the method overload that you use. Ther's 6 overload of the method read: 3 synchronous and 3 asynchronous.
sync:
IMPORT_C TInt Read(TDes8 &aDes, TInt aLength) const;
IMPORT_C TInt Read(TDes8 &aDes, TInt aLength) const;
IMPORT_C TInt Read(TInt aPos, TDes8 &aDes, TInt aLength) const;

async:
IMPORT_C TInt Read(TDes8 &aDes, TInt aLength, TRequestStatus &aStatus) const;
IMPORT_C TInt Read(TDes8 &aDes, TInt aLength, TRequestStatus &aStatus) const;
IMPORT_C TInt Read(TInt aPos, TDes8 &aDes, TInt aLength, TRequestStatus &aStatus) const;

I don't understand the problem...
the strange error it's KErrCorrupt..what's corrupting?

[Priju Jacob Paul]

Well, this is my peice of code and it works for me.

void ActiveRead::ConstructL()
{
    iFs.Connect();
    _LIT(KFile,"c:\\system\\apps\\MyXmlParser\\test.jpg");
    _LIT(KFile1,"c:\\system\\apps\\MyXmlParser\\test1.jpg");
    aFile.Replace(iFs,KFile1,EFileWrite);
    iFile.Open(iFs,KFile,EFileRead);   
    
    iFile.Size(iSizeRead);
    m_pTmpBuffer = HBufC8::NewL(iSizeRead);
    // mpuntBuffer is TPtr8 and i initialise it in the constructor.
    mpuntBuffer.Set(m_pTmpBuffer->Des());
    aFile.Size(iSizeWrite);        
    ReadFile();
}

void ActiveRead::ReadFile()
{  
    iFile.Read(mpuntBuffer, 100,iStatus);
    SetActive();
}

void ActiveRead::RunL()
{
   if (iStatus == KErrNone)
    {    
      if ( m_pTmpBuffer->Des().Length() == iSizeRead )
            {            
             iFile.Close();
             delete m_pTmpBuffer;
             m_pTmpBuffer = 0;
            }
      else
         {
            // Read the next chunk of the file.            
            aFile.Write(mpuntBuffer);  
            aFile.Size(iSizeWrite);
            
            if(iSizeWrite!=iSizeRead)      
              ReadFile();                           
         }            
    }
    else
    {
      TBuf<10>abuf;
      abuf.AppendNum(iStatus.Int());
      User::InfoPrint(abuf);
    }   

}

Regards,
Priju

[muntain]

Ok thank you, I'm going to try your code, I'll give you feedback

[muntain]

No...the problem it's the same...I'm realy confused but probably it's my problem, thank you anyway for the support

[hotcheese]

It depend from the method overload that you use. Ther's 6 overload of the method read: 3 synchronous and 3 asynchronous.
sync:
IMPORT_C TInt Read(TDes8 &aDes, TInt aLength) const;
IMPORT_C TInt Read(TDes8 &aDes, TInt aLength) const;
IMPORT_C TInt Read(TInt aPos, TDes8 &aDes, TInt aLength) const;

async:
IMPORT_C TInt Read(TDes8 &aDes, TInt aLength, TRequestStatus &aStatus) const;
IMPORT_C TInt Read(TDes8 &aDes, TInt aLength, TRequestStatus &aStatus) const;
IMPORT_C TInt Read(TInt aPos, TDes8 &aDes, TInt aLength, TRequestStatus &aStatus) const;

I don't understand the problem...
the strange error it's KErrCorrupt..what's corrupting?

So which of these does this
m_fSource.Read(m_iTotBytesRead, puntBuffer,iStatus);

match to?

If m_iTotBytesRead is a TInt, puntBuffer is a descriptor, iStatus is a TRequestStatus then I don't see the following signature in your list

IMPORT_C TInt Read(TInt aPos, TDes8 &aDes, TRequestStatus &aStatus)