Hello Ketil, Monday, May 21, 2007, 12:43:16 PM, you wrote: isSpace :: Char ->> Bool
isSpace = isSp . ord isSp c | c <= 13 = c >= 8 -- \b..\r | c <= 127 = c == 32 -- ' ' | c <= 255 = c == 0xa0 -- nbsp | otherwise = iswspace(..)
that's great but array-based test should be even faster:
isSp c | c <= 255 = spaceArray!c /= 0 | otherwise = iswspace(..)
spaceArray :: UArray Int Word8 moreover, we can do the same trick as done in C libraries - pack several boolean tests into one Word8. but probably, direct use of isspace will be even better:
isSp c | c <= 255 = isspace c | otherwise = iswspace(..)
foreign unsafe import isspace ... foreign unsafe import iswspace ...
moreover, if we know platforms where iswpace checks the whole range, we can speed up code on these platforms by omitting isspace check -- Best regards, Bulat mailto:Bulat.Ziganshin@gmail.com