examples/Base/ArraysAndLists/linkedlist/dbllist/src/dbllist.cpp

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Description: 
Contains the E32Main() function, which executes the example.
The example demonstrates the use of the TDblQue class, which represents
a doubly linked list.
The user enters a string, which is stored as linked list of characters
of the string. The user can edit this string by adding characters to the
string.
The example displays the reverse of this string on the console. 
*/

#include "mystringreverse.h"

LOCAL_D CConsoleBase* console;

LOCAL_C void DoStartL();
LOCAL_C void CallExampleL();

LOCAL_C void DoStartL()
        {
        // Create and install the active scheduler.
        CActiveScheduler* scheduler = new (ELeave) CActiveScheduler();
        CleanupStack::PushL(scheduler);
        CActiveScheduler::Install(scheduler);

        _LIT(KTextDbllist,"Double Linked List Demo\nEnter the characters of the string\n");
        console->Printf(KTextDbllist);
        // Create an object of the CMyStringReverse class.
        CMyStringReverse* stringreverse = CMyStringReverse::NewL(console);
        CleanupStack::PushL(stringreverse);

        // Read the string from the user.
        // Generate an asynchronous read request.
        stringreverse->ReadOption();

        // Start the active scheduler.
        CActiveScheduler::Start();

        // Destroy the objects in the cleanup stack.
        CleanupStack::PopAndDestroy(2, scheduler); // stringreverse, scheduler.
        }

GLDEF_C TInt E32Main() // main function called by E32
    {
        __UHEAP_MARK;
        CTrapCleanup* cleanup=CTrapCleanup::New(); // get clean-up stack
        TRAPD(error, CallExampleL()); // more initialization, then do example
        delete cleanup; // destroy clean-up stack
        __ASSERT_ALWAYS(!error, User::Panic(KTxtEPOC32EX, error));
        __UHEAP_MARKEND;
        return 0; // and return
    }

LOCAL_C void CallExampleL() // initialize and call example code under cleanup stack
    {
        console=Console::NewL(KTxtExampleCode, TSize(KConsFullScreen, KConsFullScreen));
        CleanupStack::PushL(console);
        TRAPD(error, DoStartL()); // perform example function
        if (error)
                console->Printf(KFormatFailed, error);
        else
                console->Printf(KTxtOK);
        console->Printf(KTextPressAnyKey);
        console->Getch(); // get and ignore character
        CleanupStack::PopAndDestroy(); // close console
    }

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