1 /*

     2 * Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

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

     6 * which accompanies this distribution, and is available

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

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 *

    16 */

    17 

    18 

    19 /**

    20  @file LOGGER.H

    21  @publishedPartner

    22  @released

    23 */

    24 #ifndef	LOGGER_H

    25 #define	LOGGER_H

    26 

    27 #include <iosfwd>

    28 

    29 enum WarnLevel

    30 	{

    31 	WARN_OFF,

    32 	WARN_ERROR,

    33 	WARN_WARN,

    34 	WARN_INFO

    35 	};

    36 

    37 

    38 struct LoggerImpl;

    39 

    40 /**

    41  * Logger class to log messages from the system.

    42  */

    43 class Logger

    44 {

    45 public:

    46 	/**

    47 	 * Function will set the minimum warning level.

    48 	 * Messages having warning level greated than this 

    49 	 * won't be printed. Check WarnLevel for details.

    50 	 */

    51 	static bool SetLevel(WarnLevel aLev);

    52 	/**

    53 	 * Set the stream to which the mssage should be written.

    54 	 */

    55 	static bool SetStream(std::wostream& aOs);

    56 	/**

    57 	 * Get a reference to the stream.

    58 	 */

    59 	static std::wostream& Stream(); 

    60 	/**

    61 	 * Checks whether a warning level is allowed to print or not.

    62 	 * @param aLev level at which the message should be printed.

    63 	 */

    64 	static bool ShouldPrint(WarnLevel aLev); 

    65 	

    66 private:

    67 	static LoggerImpl& Logger::Impl();

    68 

    69 	static LoggerImpl* iLogger;

    70 };

    71 

    72 /**

    73  * Helper macro to print infom messages

    74  */

    75 #define LINFO(x)  if (Logger::ShouldPrint(WARN_INFO)) { Logger::Stream() << L"INFO: " << x << std::endl; }

    76 /**

    77  * Helper macro to print warning messages

    78  */

    79 #define LWARN(x)  if (Logger::ShouldPrint(WARN_WARN)) { Logger::Stream() << L"WARN: " << x << std::endl; }

    80 /**

    81  * Helper macro to print error messages

    82  */

    83 #define LERROR(x) if (Logger::ShouldPrint(WARN_ERROR)){ Logger::Stream() << L"ERR : " << x << std::endl; }

    84 

    85 #endif	/* LOGGER_H */