> Since the loop copies data pointer by pointer, it can handle the case of overl... | Hacker News

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		davrosthedalek 7 months ago \| parent \| context \| favorite \| on: Going faster than memcpy > Since the loop copies data pointer by pointer, it can handle the case of overlapping data. I don't think this loop does the right thing if destination points somewhere into source. It will start overwriting the non-copied parts of source.

penguin_booze 6 months ago [–]

It'll indeed. Copying data pointer-by-pointer has nothing to do with overlaps. One should iterate backwards to deal with overlapping.

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