Hello Tom, Thursday, May 29, 2008, 8:21:25 PM, you wrote:
Are there any low-level array types (MutableByteArray#, for example) that support a memcpy-like function
yes, MBA# allows to use memcpy. you can find examples of its usage right in the array package, for example: thawSTUArray :: Ix i => UArray i e -> ST s (STUArray s i e) thawSTUArray (UArray l u arr#) = ST $ \s1# -> case sizeofByteArray# arr# of { n# -> case newByteArray# n# s1# of { (# s2#, marr# #) -> case unsafeCoerce# memcpy marr# arr# n# s2# of { (# s3#, () #) -> (# s3#, STUArray l u marr# #) }}} foreign import ccall unsafe "memcpy" memcpy :: MutableByteArray# RealWorld -> ByteArray# -> Int# -> IO () i can give you further explanations if required -- Best regards, Bulat mailto:Bulat.Ziganshin@gmail.com