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//
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// Logging.h
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// MYUtilities
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//
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// Created by Jens Alfke on 1/5/08.
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// Copyright 2008 Jens Alfke. All rights reserved.
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//
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#import <Foundation/Foundation.h>
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NSString* LOC( NSString *key ); // Localized string lookup
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// To enable IN_SEGMENT (which breaks rarely-called logging code out of your main code segment,
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// improving locality of reference) you must define MY_USE_NESTED_FNS in your prefix file or
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// target settings, and add the GCC flag "-fnested-functions" to your target's C flags.
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#if defined(MY_USE_NESTED_FNS) && ! defined(__cplusplus)
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#define IN_SEGMENT(SEG) auto __attribute__ ((section ("__TEXT, "#SEG))) __attribute__ ((noinline)) void _outofband_(void);\
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_outofband_();\
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void _outofband_(void)
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#define IN_SEGMENT_NORETURN(SEG) auto __attribute__ ((section ("__TEXT, "#SEG))) __attribute__ ((noinline)) __attribute__((noreturn)) void _assertfailure_(void);\
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_assertfailure_();\
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void _assertfailure_(void)
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#else
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#define IN_SEGMENT(SEG)
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#define IN_SEGMENT_NORETURN(SEG)
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#endif
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#define Log(FMT,ARGS...) do{if(__builtin_expect(_gShouldLog,0)) {\
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IN_SEGMENT(Logging){_Log(FMT,##ARGS);}\
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} }while(0)
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#define LogTo(DOMAIN,FMT,ARGS...) do{if(__builtin_expect(_gShouldLog,0)) {\
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IN_SEGMENT(Logging) {if(_WillLogTo(@""#DOMAIN)) _LogTo(@""#DOMAIN,FMT,##ARGS);}\
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} }while(0)
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#define Warn Warn
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void AlwaysLog( NSString *msg, ... ) __attribute__((format(__NSString__, 1, 2)));
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BOOL EnableLog( BOOL enable );
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#define EnableLogTo( DOMAIN, VALUE ) _EnableLogTo(@""#DOMAIN, VALUE)
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#define WillLog() _WillLogTo(nil)
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#define WillLogTo( DOMAIN ) _WillLogTo(@""#DOMAIN)
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// internals; don't use directly
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extern int _gShouldLog;
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void _Log( NSString *msg, ... ) __attribute__((format(__NSString__, 1, 2)));
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void Warn( NSString *msg, ... ) __attribute__((format(__NSString__, 1, 2)));
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void _LogTo( NSString *domain, NSString *msg, ... ) __attribute__((format(__NSString__, 2, 3)));
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BOOL _WillLogTo( NSString *domain );
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BOOL _EnableLogTo( NSString *domain, BOOL enable );
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