文件服务器之四：应用

来源：互联网发布：linux的shell脚本教程编辑：程序博客网时间：2024/05/21 10:47

void CTestFileAppUi::ReadFile()

{

RFs fs;

RFile file;

User::LeaveIfError(fs.Connect());

CleanupClosePushL(fs);

TInt err = file.Open(fs,KFileName,EFileRead);

CleanupClosePushL(file);

if (err != KErrNone)

{

CleanupStack::PopAndDestroy(2);

return;

}

TInt fileSize;

file.Size(fileSize);

HBufC8* fileData8 = HBufC8::NewLC(fileSize);

TPtr8 ptr8(fileData8->Des());

file.Read(ptr8);

HBufC* fileData16 = HBufC::NewLC(fileSize);

TPtr ptr16(fileData16->Des());

ptr16.Copy(ptr8);

CleanupStack::PopAndDestroy(4);

}

void CTestFileAppUi::WriteFile()

{

RFs fs;

User::LeaveIfError(fs.Connect());

CleanupClosePushL(fs);

RFile file;

CleanupClosePushL(file);

TInt err = file.Open(fs,KFileName,EFileWrite);

if (err != KErrNone)

{

CleanupStack::PopAndDestroy(2);

return;

}

User::LeaveIfError(file.Write(KFileText));

CleanupStack::PopAndDestroy(2);

}

void CTestFileAppUi::ReadStream()

{

RFs fs;

User::LeaveIfError(fs.Connect());

CleanupClosePushL(fs);

RFile file;

TInt err = file.Open(fs,KStreamName,EFileRead);

if (err != KErrNone)

{

CleanupStack::PopAndDestroy(2);

return;

}

TInt fileSize;

file.Size(fileSize);

HBufC* fileData = HBufC::NewLC(fileSize);

TPtr ptr(fileData->Des());

RFileReadStream readStream(file);

CleanupClosePushL(readStream);

readStream >> ptr;

CleanupStack::PopAndDestroy(4);

}

void CTestFileAppUi::WriteStream()

{

RFs fs;

User::LeaveIfError(fs.Connect());

CleanupClosePushL(fs);

RFile file;

TInt err = file.Open(fs,KStreamName,EFileWrite);

CleanupClosePushL(file);

if (err != KErrNone)

{

CleanupStack::PopAndDestroy(2);

return;

}

RFileWriteStream writeStream(file);

CleanupClosePushL(writeStream);

writeStream << KStreamText;

CleanupStack::PopAndDestroy(3);

}