// TPtrAndTPtrC.cpp
//
// Copyright (c) 2005 CCNIIT.  All rights reserved.

// author: hewei
// copyright 1.0
// Date: 2005-10-14

// Example shows attempt to use TPtr and TPtrC
// NOTE: the structure of this example is different to standard E32 examples


#include <e32cons.h>

  // All messages written to this
LOCAL_D CConsoleBase* console;
const TInt KMAXLENGTH=20;

// Function prototypes
 void callExampleL();
 void doExampleL();
 void useTPtr();
 void useTPtrC();
//////////////////////////////////////////////////////////////////////////////
//
//use TBuf in useTBuf function
//
//////////////////////////////////////////////////////////////////////////////
void useTPtr()
{
	_LIT(KNEWLINE,"\n");
	_LIT(KFIRST,"hello");
    _LIT(KSECOND," world!");
	_LIT(KHEWEI,"hewei!");

	TBufC<KMAXLENGTH> buf(KFIRST);//object of TBuf;
    TPtr16 ptr(buf.Des());
    // print Ptr
    console->Printf(ptr);
	console->Printf(KNEWLINE);
    //Append another string to ptr
	ptr.Append(KSECOND);
    console->Printf(ptr);
    console->Printf(KNEWLINE);
	//Insert a string to ptr
	ptr.Insert(0,KHEWEI);
	console->Printf(ptr);
    console->Printf(KNEWLINE);
	//print length and size of ptr
	_LIT(KINFO,"length=%d,size=%d\n");
	console->Printf(KINFO,ptr.Length(),ptr.Size());
	//left right mid
    _LIT(KLEFT,"left=");
	console->Printf(KLEFT);
	console->Printf(ptr.Left(3));
    console->Printf(KNEWLINE);
	_LIT(KRIGHT,"right=");
	console->Printf(KRIGHT);
    console->Printf(ptr.Right(3));
    console->Printf(KNEWLINE);
	_LIT(KMID,"mid=");
	console->Printf(KMID);
	console->Printf(ptr.Mid(4));
	console->Printf(KNEWLINE);
	//delete
	ptr.Delete(0,5);
	console->Printf(ptr);
    console->Printf(KNEWLINE);
}
void useTPtrC()
{
    _LIT(KNEWLINE,"\n");
	_LIT(KFIRST,"hello");
    _LIT(KSECOND," world!");
	_LIT(KHEWEI,"hewei!");

	TBufC<KMAXLENGTH> bufc(KFIRST);//object of TBufC;
    TPtrC ptrC(bufc);
    // print TPtrC
    console->Printf(ptrC);
	console->Printf(KNEWLINE);
	//get the modifiable description;

}
//////////////////////////////////////////////////////////////////////////////
//
// Main function called by E32
//
//////////////////////////////////////////////////////////////////////////////
GLDEF_C TInt E32Main()
    {
	  // Get cleanup stack
	CTrapCleanup* cleanup=CTrapCleanup::New();

	 // Some more initialization, then do the example
    TRAPD(error,doExampleL());
	
	  
	  // callExampleL() should never leave.
	_LIT(KMsgPanicEpoc32ex,"EPOC32EX");
	__ASSERT_ALWAYS(!error,User::Panic(KMsgPanicEpoc32ex,error));

  // destroy the cleanup stack
	delete cleanup;
	
	  // return
	return 0;
    }


//////////////////////////////////////////////////////////////////////////////
//
//
//
//////////////////////////////////////////////////////////////////////////////
void doExampleL()
{
  	//Get Console;
	_LIT(KMsgExampleCode,"Symbian OS Example Code");
	console = Console::NewL(KMsgExampleCode,TSize(KConsFullScreen,KConsFullScreen));
		// Put console onto the cleanup stack.
	CleanupStack::PushL(console);

	int error;
	TRAP(error,callExampleL());
	//TRAPD(error,callExampleL());
    if(error)
	{
		_LIT(KERROR,"error occured!\n");
		console->Printf(KERROR);
	
	}
	else{
      _LIT(KNOLEAVE,"No Leave!\n");
		console->Printf(KNOLEAVE);
	}
	console->Getch();
		// Remove the console object from the cleanupstack
	  // and destroy it. 	
	CleanupStack::PopAndDestroy();
}

void callExampleL() 
    {
    useTPtr();
	console->Getch();
    useTPtrC();
   }


//////////////////////////////////////////////////////////////////////////////
//
// Do the example
//
//////////////////////////////////////////////////////////////////////////////