examples/Base/IPC/secureserver/secureserverccountsubsession.cpp

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Description: Contains the implementation of functions described in the CSecureServerSubSession class.  
*/



#include "secureclientandserver.h"
#include "secureserver.h"

CSecureServerSubSession::CSecureServerSubSession(CSecureServerSession* aSession) : iSession(aSession)
 {
 }

void CSecureServerSubSession::SetFromStringL(const RMessage2& aMessage)
        {
        TInt deslen = aMessage.GetDesLength(0);
        RBuf buffer;

        buffer.CreateL(deslen);
        buffer.CleanupClosePushL();
        // The descriptor is encapsulated in the 0th offset of aMessage.
        // Hence, read the 0th offset of the message to the buffer.
        aMessage.ReadL(0,buffer,0);
        // Check for empty string.
        if (buffer.Length() == 0)
                {
                User::Leave(ENonNumericString);
                }
        TLex16 lexer;
        lexer.Assign(buffer);
        while (!lexer.Eos())
                {
                TChar thechar;
                thechar = lexer.Peek();
                // Check for non numeric character.
                if (!thechar.IsDigit())
                        {
                        User::Leave(ENonNumericString);
                        }
                lexer.Inc();
                }
        lexer.Assign(buffer);
        if (lexer.Val(iCount))
                {
                User::Leave(ENonNumericString);
                }
        CleanupStack::PopAndDestroy();
        }

void CSecureServerSubSession::Increase()
        {
        iCount ++;
        }

void CSecureServerSubSession::IncreaseBy(const RMessage2& aMessage)
        {
        iCount += aMessage.Int0();
        }

void CSecureServerSubSession::Decrease()
        {
        iCount --;
        }

void CSecureServerSubSession::DecreaseBy(const RMessage2& aMessage)
        {
        iCount -= aMessage.Int0();
        }

void CSecureServerSubSession::Reset()
        {
        iCount = 0;
        }

void CSecureServerSubSession::CounterValueL(const RMessage2& aMessage)
        {
        // Write the value of counter to the 0th offset of aMessage by converting it to a package.
        TPckgBuf<TInt> p(iCount);
        aMessage.WriteL(0,p);
        }

void CSecureServerSubSession::SaveCounterValueL()
        {
        RFs fs;
        User::LeaveIfError(fs.Connect());
        _LIT(KFileName,"counter.dat");
        User::LeaveIfError(fs.CreatePrivatePath(RFs::GetSystemDrive()));
        User::LeaveIfError(fs.SetSessionToPrivate(RFs::GetSystemDrive()));
        TFileName thePath;
        User::LeaveIfError(fs.PrivatePath(thePath));
        TInt err=fs.MkDir(thePath);
        if (err!=KErrAlreadyExists)
                {
                User::LeaveIfError(err);
                }
        thePath.Append(KFileName);
        RFile file;

        TBuf8<20> counterVal;
        counterVal.FillZ();
        // Append the counter value to a buffer and write to the file.
        counterVal.AppendNum(iCount);
        User::LeaveIfError(file.Replace(fs,thePath,EFileWrite));
        User::LeaveIfError(file.Write(counterVal));
        User::LeaveIfError(file.Flush());

        file.Close();
        fs.Close();
        }

void CSecureServerSubSession::SetCounterValueFromFileL()
        {
        RFs fs;
        User::LeaveIfError(fs.Connect());
        _LIT(KFileName,"counter.dat");
        User::LeaveIfError(fs.CreatePrivatePath(RFs::GetSystemDrive()));
        User::LeaveIfError(fs.SetSessionToPrivate(RFs::GetSystemDrive()));
        TFileName thePath;
        User::LeaveIfError(fs.PrivatePath(thePath));
        TInt err=fs.MkDir(thePath);
        if (err!=KErrAlreadyExists)
                {
                User::LeaveIfError(err);
                }
        thePath.Append(KFileName);
        RFile file;

        TBuf8<20> readVal;
        User::LeaveIfError(file.Open(fs,thePath,EFileRead));
        // Read counter value to the readVal buffer.
        User::LeaveIfError(file.Read(readVal));
        file.Close();
        // Convert value in readVal to TInt.
        TLex8 lex(readVal);
        lex.Val(iCount);

        fs.Close();
        }

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