From: haskell-cafe-bounces@haskell.org [mailto:haskell-cafe-bounces@haskell.org] On Behalf Of Stefan O'Rear
fromUTF8Ptr unboxes fine for me with HEAD and 6.6.1.
- the chr function tests that its Int argument is less than 1114111, before constructing the Char. It'd be nice to avoid this test.
You want unsafeChr from the (undocumented) GHC.Base module. http://darcs.haskell.org/ghc-6.6/packages/base/GHC/Base.lhs for reference (but don't copy the file, it's already an importable module).
FWIW, I've optimised this to a point where I'm happy with it, and you can see the results here: http://darcs.haskell.org/takusen/Foreign/C/UTF8.hs I was using ghc-6.6 back in June, and an upgrade to 6.6.1 fixed some of the issues for me (e.g. unboxing Ptrs, bang-patterns differ from seq). I sent a test case to Simon PJ about the duplicated code in the simplifier output, but I can't tell if it's been added as a trac ticket. Alistair ***************************************************************** Confidentiality Note: The information contained in this message, and any attachments, may contain confidential and/or privileged material. It is intended solely for the person(s) or entity to which it is addressed. Any review, retransmission, dissemination, or taking of any action in reliance upon this information by persons or entities other than the intended recipient(s) is prohibited. If you received this in error, please contact the sender and delete the material from any computer. *****************************************************************