/*

* 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: logging tool for debug logs 

 *

*/

/*

*

*  Description:

*

*     Logging tools. Uniforms style to write debug data to

*     screen using RDebug or to a file with RFileLogger.

*

*     Usage:

*     1.Configuring:

*

*       Logging and debug printing is configured with following macros

*           CHAT_ENABLE_DEBUG_PRINT         (defining this enables debug printing)

*           CHAT_DEBUG_OUTPUT_TO_FILE       (now debug printing goes to file)

*           CHAT_DEBUG_FILENAME "Some.log"  (file to store debug log)

*

*       Debug printing can be configured on project level by defining desired

*       macros in .mmp file like this

*           //enable file logging

*           MACRO CHAT_ENABLE_DEBUG_PRINT

*           MACRO CHAT_DEBUG_OUTPUT_TO_FILE

*

*       You may also automate the debug printing to follow current build

*       variant like this:

*           #ifdef _DEBUG

*           MACRO CHAT_ENABLE_DEBUG_PRINT

*           #endif // _DEBUG

*

*       The file to write debug log needs to be defined in file level.

*       (Defining it in mmp file causes errors to build procedure..)

*           #define CHAT_DEBUG_FILENAME "Example.log"

*

*       When using debug printing to file, flogger.lib needs to be added in

*       mmp file

*           LIBRARY  flogger.lib

*       and following directory must be manually done before loggin

*       (no directory, not logs) Epoc32\Wins\c\logs\CHAT\

*

*

*     2.Printing:

*

*       // normal string                                  output:

*       CHAT_DP( D_CHAT_LIT( "Some text." ) );                >> CHAT: Some text.

*       CHAT_DP( D_PLAIN_LIT( "Some text." ) );               >> Some text.

*       CHAT_DP_TXT( "Some text." );                          >> CHAT: Some text.

*

*       // string with variables

*       TInt index( 99 );

*       _LIT( KExample, "Example" );

*       CHAT_DP( D_CHAT_LIT( "Some text: %d" ), 100 );        >> CHAT: Some text: 100

*       CHAT_DP( D_CHAT_LIT( "Some text: %d" ), index );      >> CHAT: Some text: 99

*       CHAT_DP( D_CHAT_LIT( "Some text: %S" ), &KExample );  >> CHAT: Some text: Example

*

*       CHAT_DP( D_PLAIN_LIT( "Some text: %d" ), 100 );       >> Some text: 100

*       CHAT_DP( D_PLAIN_LIT( "Some text: %d" ), index );     >> Some text: 99

*       CHAT_DP( D_PLAIN_LIT( "Some text: %S" ), &KExample ); >> Some text: Example

*

*

*     3.Known issues:

*

*       - If you use macros from .mmp file remember to abld makefile <target> to

*         change flags from project.

*       - In statements like CHAT_DP( D_CHAT_LIT("Some text: %S"), &KExample );

*         parameters causes still some code to generated in release builds.

*         Propably it is best to #ifdef all debugprint blocks

*         with CHAT_ENABLE_DEBUG_PRINT statement.

*

* ============================================================================

*/

#ifndef __VIMPSTIMDEBUGPRINT_H__

#define __VIMPSTIMDEBUGPRINT_H__

#include "vimpstbuilddefinitions.h"

// Debug logging is enabled, you may enable debug printing in release builds also

#ifdef CHAT_ENABLE_DEBUG_PRINT

    // no include files if no debug printing --> faster compile time

    // INCLUDES

    #include <e32std.h>

    #include <e32svr.h>

    #include <flogger.h>

//

//    #ifndef _DEBUG

//        // warn in release build

//        #if defined( __VC32__ )

//            #pragma message( "Warning: CHAT debug printing is on in release build!" ) // CSI: 68 # Warning for rel builds

//        #else // __GCC32__

//            #warning "CHAT debug printing is on in release build!"

//        #endif // __VC32__

//    #endif

    /**

     * Depending if the build is UNICODE or not, define the

     * helper macros that insert CHAT prefix.

     */

    #ifdef _UNICODE

        #define CHAT_TOKEN_PASTING( s ) L##s

        #define CHAT_TO_UNICODE( s ) CHAT_TOKEN_PASTING( s )

        #define CHAT_DEBUG_STR( m ) CHAT_TO_UNICODE( "CHAT: " ) L##m

    #else

        #define CHAT_DEBUG_STR "CHAT: "

    #endif // _UNICODE

    /**

     * Helper macro for defining debug strings with plain debug text.

     */

    #define D_PLAIN_LIT( s ) _L( s )    // CSI: 78 # Debug print

    /**

     * Helper macro for defining debug strings with "CHAT:" prefix.

     */

    #define D_CHAT_LIT( s ) TPtrC( ( const TText * ) CHAT_DEBUG_STR( s ) )

    #ifdef CHAT_DEBUG_OUTPUT_TO_FILE

        /**

         * Method to handle file writing

         */

        inline void CHATDebugWriteFormat( TRefByValue<const TDesC> aFmt,... )

            {

            _LIT( KDir, "Chat" );

            #ifdef CHAT_DEBUG_FILENAME

                const static TLitC< sizeof( CHAT_DEBUG_FILENAME ) > KName={

                	sizeof( CHAT_DEBUG_FILENAME)-1,

                	CHAT_TO_UNICODE( CHAT_DEBUG_FILENAME ) };

            #else

                _LIT( KName, "ChatDebug.log" );

            #endif // CHAT_DEBUG_FILENAME

            // take the ellipsis parameters

            VA_LIST args;

            VA_START( args,aFmt );

            RFileLogger::WriteFormat( KDir, KName, EFileLoggingModeAppend,

            	aFmt, args );

            VA_END( args );

            }

        /**

         * Actual debug printters.

         * Output to log file.

         */

        #define CHAT_DP CHATDebugWriteFormat

        #define CHAT_DP_TXT( s ) CHATDebugWriteFormat( D_CHAT_LIT( s ) )

    #else

        /**

         * Actual debug printters.

         * Output to debugger output.

         */

        #define CHAT_DP RDebug::Print

        #define CHAT_DP_TXT( s ) RDebug::Print( D_CHAT_LIT( s ) )

    #endif

#else   //CHAT_ENABLE_DEBUG_PRINT

    /**

     *

     * Empty implementations for non-debug printing build versions.

     *

     */

    /**

     * Dummy struct for checking that all CHAT_DP's define string

     * literals using space-saving D_PLAIN_LIT or D_CHAT_LIT.

     */

    struct TCHATEmptyDebugString { };

    /**

     * Macro for defining debug-only literal strings (empty release version)

     */

    #define D_PLAIN_LIT( s ) TCHATEmptyDebugString()

    /**

     * Macro for defining debug-only literal strings (empty release version)

     */

    #define D_CHAT_LIT( s ) TCHATEmptyDebugString()

    /**

     * Macro for empty debug print function

     */

    #define CHAT_DP_TXT( s ) CHAT_DP( D_CHAT_LIT( s ) )

    /// Empty debug print function for release builds.

    inline void CHAT_DP(TCHATEmptyDebugString)

        {

        }

    template< class T1 >

    inline void CHAT_DP( TCHATEmptyDebugString, T1 )

        {

        }

    template< class T1, class T2 >

    inline void CHAT_DP( TCHATEmptyDebugString, T1, T2 )

        {

        }

    template< class T1, class T2, class T3 >

    inline void CHAT_DP( TCHATEmptyDebugString, T1, T2, T3 )

        {

        }

    template< class T1, class T2, class T3, class T4 >

    inline void CHAT_DP( TCHATEmptyDebugString, T1, T2, T3, T4 )

        {

        }

    template< class T1, class T2, class T3, class T4, class T5 >

    inline void CHAT_DP( TCHATEmptyDebugString, T1, T2, T3, T4, T5 )

        {

        }

    template< class T1, class T2, class T3, class T4, class T5, class T6 >

    inline void CHAT_DP( TCHATEmptyDebugString, T1, T2, T3, T4, T5, T6 )

        {

        }

    template< class T1, class T2, class T3, class T4, class T5, class T6,

    	class T7 >

    inline void CHAT_DP( TCHATEmptyDebugString, T1, T2, T3, T4, T5, T6, T7 )

        {

        }

    template< class T1, class T2, class T3, class T4, class T5, class T6,

    	class T7, class T8 >

    inline void CHAT_DP( TCHATEmptyDebugString, T1, T2, T3, T4, T5, T6, T7, T8 )

        {

        }

    template< class T1, class T2, class T3, class T4, class T5, class T6,

    	class T7, class T8, class T9 >

    inline void CHAT_DP( TCHATEmptyDebugString, T1, T2, T3, T4, T5, T6, T7, T8,

    		T9 )

        {

        }

    template< class T1, class T2, class T3, class T4, class T5, class T6,

    	class T7, class T8, class T9, class T10 >

    inline void CHAT_DP( TCHATEmptyDebugString, T1, T2, T3, T4, T5, T6, T7, T8,

    		T9, T10 )

        {

        }

    template< class T1, class T2, class T3, class T4, class T5, class T6,

    	class T7, class T8, class T9, class T10, class T11 >

    inline void CHAT_DP( TCHATEmptyDebugString, T1, T2, T3, T4, T5, T6, T7, T8,

    		T9, T10, T11 )

        {

        }

#endif  // CHAT_ENABLE_DEBUG_PRINT

/* Some general wrappers to CHAT_DP for convenience.

 *

 * Since these just wrap CHAT_DP, they work transparently: the macros write

 * stuff to debug output or to a file, whichever you are using,

 * you don't have to care.

 *

 * Since CHAT_DP is either defined or empty inline, these won't

 * matter in either build (no, there is no noticeable penalty in compile time)

 *

 * There are three types of wrappers, output format is

 *

 * "filename:linenumber method - enter" when entering function

 * "filename:linenumber method - message" when inside function

 * "filename:linenumber method - done" when exiting function

 *

 * Example:

 * TInt CSomeClass::SomeMethod()

 * {

 *      CHAT_DP_FUNC_ENTER( "SomeMethod" );

 *

 *      TInt i = 41;

 *

 *      CHAT_DP_FUNC_DP( "SomeMethod", "Doing intensive calculations" );

 *

 *      i++;

 *

 *      CHAT_DP_FUNC_DONE( "SomeMethod" );

 *  }

 *

 * You have to provide the method name yourself since the __FUNCTION__

 * preprocessor macro is not understood.

 */

#include "vimpstdebugmacros.h" 	// WFILE etc.

// when entering a function

#define CHAT_DP_FUNC_ENTER( method ) \

    CHAT_DP( D_CHAT_LIT("%s:%d %s - enter" ), __WFILE__, __LINE__, L ## method );

// debug print

#define CHAT_DP_FUNC_DP( method,msg ) \

    CHAT_DP( D_CHAT_LIT( "%s:%d %s - %s" ), __WFILE__, __LINE__, L ## method, L ## msg );

// when exiting a function

#define CHAT_DP_FUNC_DONE(method) \

    CHAT_DP( D_CHAT_LIT( "%s:%d %s - done" ), __WFILE__, __LINE__, L ## method );

#endif  // IMDEBUGPRINT_H__

//  End of File