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by zambal
2851 days ago
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You are correct. At least the do... while statement is a common c macro trick to make sure a macro has its own scope. The idea is that a compiler will optimize the do....while statement away, so it does not have any runtime overhead. The wile...while(0) statement is new for me (didn't know this is actually legal syntax), but I suspect it's done for similar reasons. |
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It looks like some unusual looping syntax; but in fact these are just two normal while loops one after another.