[FFmpeg-devel] [PATCH] Fix 4XM decoding on big-endian and unaligned reads

[Nicolas George]

Le primidi 21 brumaire, an CCXIX, Vitor Sessak a ?crit?:
>> Also if you already add {} to the macro you could go for the proper
>> do { .. } while (0) (or remove the {}, I don't really care).
> Is there any advantage for one or other way? I find it more readable  
> without the do ... while(0).

It has to do with the semicolon at the end. Consider:

	if (foo)
	    macro(bar);
	else
	    something_else();

Without the do-while, it becomes:

	if (foo) {
	    ...
	}; else
	    something_else();

which is syntactically incorrect because of the semicolon.

Regards,

-- 
  Nicolas George
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