/*

* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: trace logs

 *

*/

#ifndef UISERVICETABTRACER_H

#define UISERVICETABTRACER_H

#include <e32base.h>

#include <flogger.h>

#include "vimpstbuilddefinitions.h"

#ifdef CHAT_ENABLE_DEBUG_PRINT

// --------------------------------------------------------------------------

// Define tracer logging method

// 0    = Logging off

// 1    = Log to RDebug

// 2    = Log to file (RFileLogger)

// --------------------------------------------------------------------------

//

#ifdef __WINS__

  #ifdef _DEBUG

    #define TRACER_LOG_METHOD 1 // for WINS UDEB

  #else

    #define TRACER_LOG_METHOD 0 // for WINS UREL

 #endif

#else

#endif

#endif

// --------------------------------------------------------------------------

// Whether to use TRAP_INSTRUMENTATIONs to

// log trapped leaves

// --------------------------------------------------------------------------

//

#define TRACE_TRAPS

//============================================================================

// Logging off, define empty macros and skip all the rest

#if TRACER_LOG_METHOD == 0

#define TRACER(func)

#define TRACER_AUTO

#define TRACER_RET(func,format)

#define TRACER_AUTO_RET(format)

#define TRACER_LEAVE(func)

#define TRACER_AUTO_LEAVE

#define TRACE(args...)

#define TRACE8(args...)

#define TRACER_TO16(a,b)

#define TRACER_TO8(a,b)

#define TRACER_CLOSELOG

#else  // Logging on

// --------------------------------------------------------------------------

// Change these to modify line syntax

// --------------------------------------------------------------------------

//

_LIT( KLogBase, "UiServiceTab %S(%d): %S");

_LIT( KLogEnter, "UiServiceTab %S: ENTER" );

_LIT( KLogExit, "UiServiceTab %S: EXIT" );

_LIT( KLogLeave, "UiServiceTab %S: LEAVE!" );

_LIT( KLogTrappedLeave, "UiServiceTab %S(%d): TRAPPED LEAVE, code %d!" );

_LIT( KLogExitRet, "UiServiceTab %S: EXIT, Returning " );

_LIT( KLogDir,  "UiServiceTab" ); 

_LIT( KLogFile, "UiServiceTab.log" );

#define TRACER_PARAMS_LENGTH 200

// --------------------------------------------------------------------------

// Macro to print only function leaves (not entries or exits). 

// Example: TRACER_LEAVE( "CMyClass::MyFunction" );

// --------------------------------------------------------------------------

//

#define TRACER_LEAVE(func) TTracer function_tracer( _S(func), _S(""), EFalse )

// --------------------------------------------------------------------------

// Same as above, except that function name is generated automatically

// Example: TRACER_AUTO_LEAVE;

// --------------------------------------------------------------------------

//

#define TRACER_AUTO_LEAVE TTracer \

    function_tracer( ((const TText8*)__PRETTY_FUNCTION__), _S(""), EFalse )

// --------------------------------------------------------------------------

// Macro to print function entry, exit and leave. 

// Example: TRACER( "CMyClass::MyFunction" );

// --------------------------------------------------------------------------

//

#define TRACER(func) TTracer function_tracer( _S(func), _S(""), ETrue )

// --------------------------------------------------------------------------

// Same as above, except that function name is generated automatically

// Example: TRACER_AUTO;

// --------------------------------------------------------------------------

//

#define TRACER_AUTO \

    TTracer function_tracer \

        ( ((const TText8*)__PRETTY_FUNCTION__), _S(""), ETrue )

// --------------------------------------------------------------------------

// Macro to print function return value in addition to entry, exit 

// and leave conditions. Second parameter is a formatting string used 

// to print the return value Example to print an integer return value:

// TRACER_RET("CMyclass::MyFunction", "%d");

// --------------------------------------------------------------------------

//

#define TRACER_RET(func,format) \

    TTracer function_tracer( _S(func), _S(format), ETrue )

// --------------------------------------------------------------------------

// Same as above, except that function name is generated automatically

// Example: TRACER_AUTO_RET( "%d" );

// --------------------------------------------------------------------------

//

#define TRACER_AUTO_RET(format) \

    TTracer function_tracer \

        ( ((const TText8*)__PRETTY_FUNCTION__), _S(format), ETrue )

// --------------------------------------------------------------------------

// Macro to print custom msg with any number of parameters

// Either TRACER, TRACER_RET or TRACER_LEAVE 

// must be called before in same scope

// It's is assumed that descriptor (pointer) parameters are 16-bit

// NOTE: It is also assumed that parameter values

// add no more than TRACE_PARAMS_LENGTH to the traced string

// --------------------------------------------------------------------------

//

#define TRACE( args... ) function_tracer.trace( __LINE__, ## args )

// --------------------------------------------------------------------------

// Macro to print custom msg with any number of parameters

// Either TRACER, TRACER_RET or TRACER_LEAVE 

// must be called before in same scope

// It's is assumed that descriptor (pointer) parameters are 8-bit

// NOTE: It is also assumed that parameter values 

// add no more than TRACE_PARAMS_LENGTH to the traced string

// --------------------------------------------------------------------------

//

#define TRACE8( args... ) function_tracer.trace8(__LINE__, ## args )

// --------------------------------------------------------------------------

// Just to quickly convert descriptors if needed

// --------------------------------------------------------------------------

//

#define DESCRIPTOR_LENGTH 100

#define TRACER_TO16( desc8, desc16 ) \

    TBuf<DESCRIPTOR_LENGTH> desc16;desc16.Copy(desc8) 

#define TRACER_TO8( desc16, desc8 ) \

    TBuf8<DESCRIPTOR_LENGTH> desc8;desc8.Copy(desc16) 

#ifdef TRACE_TRAPS

#undef TRAP_INSTRUMENTATION_LEAVE

#define TRAP_INSTRUMENTATION_LEAVE(aResult) \

    TTracer::static_trace( ((const TText8*)__PRETTY_FUNCTION__), \

                           __LINE__, aResult )

#endif

#if TRACER_LOG_METHOD == 1      // Print to RDebug

#include <e32debug.h>

#define TRACER_PRINT(a)            RDebug::Print(a,&iFunc);

#define TRACER_PRINT_BASE(a,b,c)   RDebug::Print(a,&iFunc, b, c);

#define TRACER_PRINT_RET(a,b)      RDebug::Print(a,&iFunc,b);

#define TRACER_PRINT_STATIC(a, b, c,d ) \

    RDebug::Print(a, b, c, d);

#elif TRACER_LOG_METHOD == 2    // Print to file

 // needs flogger.lib as DEBUGLIBRARY

// --------------------------------------------------------------------------

// Log directory under C:\logs

// --------------------------------------------------------------------------

//

//_LIT( KLogDir,  "MeCo" );      

// --------------------------------------------------------------------------

// Log filename in log directory

// --------------------------------------------------------------------------

//

//_LIT( KLogFile, "MeCo.log" );

#define TRACER_PRINT(a)         RFileLogger::WriteFormat(KLogDir, \

                            KLogFile,EFileLoggingModeAppend,a,&iFunc);

#define TRACER_PRINT_BASE(a,b,c)   RFileLogger::WriteFormat(KLogDir, \

                            KLogFile,EFileLoggingModeAppend,a,&iFunc,b,c);

#define TRACER_PRINT_RET(a,b)   RFileLogger::WriteFormat(KLogDir, \

                            KLogFile,EFileLoggingModeAppend,a,&iFunc,b);

#define TRACER_PRINT_STATIC(a,b,c,d) \

    RFileLogger::WriteFormat(KLogDir, \

        KLogFile,EFileLoggingModeAppend,a,b,c,d);

#endif

/**

 * Simple tracer class that logs function enter, exit or leave

 */

class TTracer : public CBase

    {

private:

    /**

     * Simple helper method to just return if NULL

     */

    template<class T> static void ReturnIfNull(T* aNy) 

        { if ( !aNy ) return; }

public:

    /**

     * inline constructor to write log of entering a function

     */

    TTracer( const TText* aFunc, 

             const TText* aRetFormat, 

             TBool aPrintEnter) :

        iFunc( aFunc), 

        iRetFormat( aRetFormat ),

        iPrintEnterAndExit( aPrintEnter)

        {

        iFuncBuf = NULL;

        //iLogger.Connect();

        //iLogger.CreateLog(KLogDir, KLogFile, mode);

        if ( iPrintEnterAndExit )

            {

            TRACER_PRINT( KLogEnter );

            }

        }

    /**

     * inline constructor to write log of entering a function (8-bit)

     */

    TTracer( const TText8* aFunc, 

             const TText* aRetFormat, 

             TBool aPrintEnter) :

        iRetFormat( aRetFormat ),

        iPrintEnterAndExit( aPrintEnter )

        {

        TInt len = User::StringLength ((const unsigned char*)aFunc );

        HBufC8* temp = HBufC8::New( len );

        ReturnIfNull( temp );

        *temp = (const TUint8*)aFunc;

        iFuncBuf = HBufC::NewL( len );

        //iLogger.Connect();

        //iLogger.CreateLog(KLogDir, KLogFile, EFileLoggingModeAppend);

        if ( iFuncBuf )

            {

            iFuncBuf->Des().Copy( *temp );

            iFunc.Set( *iFuncBuf );

            if ( iPrintEnterAndExit )

                {

                TRACER_PRINT( KLogEnter );

                }

            }

        delete temp;

        }

    /**

     * inline destructor to write log of exiting a function 

     * normally or with a leave

     */

    ~TTracer( )

        {

        if ( std::uncaught_exception ( ) ) // Leave is an exception

            {

            // The function exited with a leave

            TRACER_PRINT( KLogLeave );

            }

        else

            {

            // The function exited normally

            if ( iPrintEnterAndExit )

                {

                if ( iRetFormat.Length ( )== 0 )

                    {

                    TRACER_PRINT( KLogExit );

                    }

                else

                    {

                    // Log the return value

#ifdef __WINS__

                    TInt32 retVal = 0;

                    // The assembly bit. This needs to be reimplemented

                    // for every target. 

                    _asm( mov retVal, ebx );

                    TBuf<100> format( KLogExitRet );

                    format.Append( iRetFormat );

                    TRACER_PRINT_RET( format, retVal );

#else

                    // ARM assembler to get return value

                    // could be implemented here..

                    TRACER_PRINT( KLogExit );

#endif

                    }

                }

            }

        //iLogger.Close();

        delete iFuncBuf;

        }

public:

    /**

     * Trace method that assumes 16-bit descriptor parameters

     */

    void trace( TInt aLine, const char* aMsg, ... )

        {

        ReturnIfNull( iFunc.Ptr() );

        TInt len = User::StringLength ((const unsigned char*)aMsg );

        TPtrC8 msg( (const unsigned char*)aMsg, len );

        HBufC* format = HBufC::New( len );

        ReturnIfNull( format );

        format->Des().Copy( msg );

        HBufC* result = HBufC::New( len + TRACER_PARAMS_LENGTH );

        if ( result )

            {

            VA_LIST list;

            VA_START( list, aMsg );

            result->Des().FormatList( *format, list );

            VA_END(list);

            TRACER_PRINT_BASE(KLogBase, aLine, result );

            }

        delete format;

        delete result;

        }

    /**

     * Trace method that assumes 8-bit descriptor parameters

     */

    void trace8(TInt aLine, const char* aMsg, ... )

        {

        ReturnIfNull( iFunc.Ptr() );

        TInt len = User::StringLength ((const unsigned char*)aMsg );

        TPtrC8 msg( (const unsigned char*)aMsg, len );

        HBufC8* result8 = HBufC8::New( len + TRACER_PARAMS_LENGTH );

        ReturnIfNull( result8 );

        VA_LIST list;

        VA_START( list, aMsg );

        result8->Des().FormatList( msg, list );

        VA_END(list);

        HBufC* result16 = HBufC::New( result8->Length() );

        if ( result16 )

            {

            result16->Des().Copy( *result8 );

            TRACER_PRINT_BASE( KLogBase, aLine, result16 );

            }

        delete result8;

        delete result16;

        }

    static void static_trace( const TText8* aFunc, 

                              TInt aLine,

                              TInt aResult )

        {

        TInt len = User::StringLength ((const unsigned char*)aFunc );

        HBufC8* temp = HBufC8::New( len );

        ReturnIfNull( temp );

        *temp = (const TUint8*)aFunc;

        HBufC* funcBuf = HBufC::NewL( len );

        if ( funcBuf )

            {

            funcBuf->Des().Copy( *temp );

            TRACER_PRINT_STATIC( 

                KLogTrappedLeave, funcBuf, aLine, aResult );

            }

        delete temp;

        delete funcBuf;

        }

public:

    /** 

     * Pointer descriptor to function signature that is to be logged.

     */

    TPtrC iFunc;

    //RFileLogger iLogger;

private:

	/**

     * Formatting string used to print the function return value

     */

    TPtrC iRetFormat;

    /**

     * If true, method enters and exits are printed

     */

    TBool iPrintEnterAndExit;

    /**

     * Buffer to store function name when needed

     */

    HBufC* iFuncBuf;

    };

#endif // TRACER_LOG_METHOD != 0 && CHAT_ENABLE_DEBUG_PRINT

#endif // UISERVICETABTRACER_H

// End of file