/*	Copyright © 2007 Apple Inc. All Rights Reserved.
	
	Disclaimer: IMPORTANT:  This Apple software is supplied to you by 
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			install, modify or redistribute this Apple software.
			
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			"Apple Software"), to use, reproduce, modify and redistribute the Apple
			Software, with or without modifications, in source and/or binary forms;
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			without modifications, you must retain this notice and the following
			text and disclaimers in all such redistributions of the Apple Software. 
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			may be used to endorse or promote products derived from the Apple
			Software without specific prior written permission from Apple.  Except
			as expressly stated in this notice, no other rights or licenses, express
			or implied, are granted by Apple herein, including but not limited to
			any patent rights that may be infringed by your derivative works or by
			other works in which the Apple Software may be incorporated.
			
			The Apple Software is provided by Apple on an "AS IS" basis.  APPLE
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*/
#if !defined(__CALogger_h__)
#define __CALogger_h__

/*
	This class is a stack based class that can be used for logging. 
	
	If you use the CALogger macros defined below to instantiate log, then the loggings is automatically turned off for non-DEBUG builds
	
	You can start each use of the logger with a preamble, that will print as:
		-> Preamble
		 : -> each line of added log text
		<- Preamble
	
	If you reach a condition where you don't want logging, then you Clear() the logger.
	It shouldn't be used after that (its a way to signal that upon destruction you don't want a log entry
*/

class CALogger {
public:
		CALogger ();
		CALogger (char* str);
		~CALogger ();
			
		void Add (char* str, ...);
		
		void Clear ();
		
private:
		char* mInitString;
		char* mStr;

		CALogger (const CALogger& c);
		CALogger& operator= (const CALogger& c);
};


#if DEBUG || CoreAudioDebug

	#define CALoggerMake						CALogger __logger__
	#define CALoggerMakeMsg(msg)				CALogger __logger__(msg)

	#define CALoggerMsg(msg)					__logger__.Add(msg)
	#define CALoggerMsgN1(msg, N1)				__logger__.Add(msg, N1)
	#define CALoggerMsgN2(msg, N1, N2)			__logger__.Add(msg, N1, N2)
	#define CALoggerMsgN3(msg, N1, N2, N3)		__logger__.Add(msg, N1, N2, N3)
	#define CALoggerMsgN4(msg, N1, N2, N3, N4)	__logger__.Add(msg, N1, N2, N3, N4)
	
	#define CALoggerClear						__logger__.Clear()

#else

	#define CALoggerMake
	#define CALoggerMakeMsg(msg)

	#define CALoggerMsg(msg)
	#define CALoggerMsgN1(msg, N1)
	#define CALoggerMsgN2(msg, N1, N2)
	#define CALoggerMsgN3(msg, N1, N2, N3)
	#define CALoggerMsgN4(msg, N1, N2, N3, N4)
	
	#define CALoggerClear

#endif

#endif // #define __CALogger_h__