Symbian编程总结-基础篇-描述符（2）-TDesC8与TDesC16之间的互转

1、使用Copy

_LIT8(KTestStr,  " This is a string " );
TBufC8 < 50 >  buf(KTestStr);

TBuf < 100 >  newBuf;
newBuf.Copy(buf);

TBuf8 < 50 >  newBuf1;
newBuf1.Copy(newBuf);

 

2、使用CCnvCharacterSetConverter类

_LIT8(KTestStr,  " This is a String " n " );
TBufC8 < 50 >  buf(KTestStr);

CCnvCharacterSetConverter *  conv  =  CCnvCharacterSetConverter::NewL();

CleanupStack::PushL(conv);

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

if  (conv -> PrepareToConvertToOrFromL(KCharacterSetIdentifierAscii, fs)  !=  CCnvCharacterSetConverter::EAvailable)
{
User::Leave(KErrNotSupported);
}

HBufC *  str  =  HBufC::NewL(buf.Length());
CleanupStack::PushL(str);

TPtr ptr  =  str -> Des();
TInt state  =  CCnvCharacterSetConverter::KStateDefault;

if  (conv -> ConvertToUnicode(ptr, buf, state)  ==  CCnvCharacterSetConverter::EErrorIllFormedInput)
{
User::Leave(KErrArgument);
}

fs.Close();
console -> Write(ptr);

CleanupStack::PopAndDestroy( 2 );  //  str, conv