Re: [Haskell-cafe] Bit Field Marshalling

2008-11-07 Thread Michael D. Adams
On Fri, Nov 7, 2008 at 3:46 AM, Lutz Donnerhacke <[EMAIL PROTECTED]> wrote: > * Michael D. Adams wrote: >> But as far as I can tell, hsc2hs doesn't support bit >> fields. On top of that I'm not sure I can make any safe assumptions >> about what order the bit fields are packed (LSB or MSB first). >

Re: [Haskell-cafe] performance difference for binary-0.4.3.1 with ghc-6.8.3 and ghc-6.10

2008-11-07 Thread Don Stewart
jwlato: > On Mon, Oct 27, 2008 at 12:34 AM, Alexander Dunlap > <[EMAIL PROTECTED]> wrote: > > On Sun, Oct 26, 2008 at 9:36 AM, John Lato <[EMAIL PROTECTED]> wrote: > >> Hello, > >> > >> I was experimenting with using ghc-6.10.0.20081007 on a project, and > >> it seems that binary-0.4.3.1 has marked

Re: [Haskell-cafe] Convolution

2008-11-07 Thread Andrew Coppin
Henning Thielemann wrote: I think the verb is 'convolve'. Possibly. If ks is infinite it will not work. Indeed. If the correlate function could be altered to use Prelude list functions only, I would think the above code works quite well with stream fusion too. (Presumably you could do t

Re: [Haskell-cafe] Convolution

2008-11-07 Thread Henning Thielemann
On Fri, 7 Nov 2008, Andrew Coppin wrote: A simple and straight-forward way to define the DSP operations of correlation and convolution is as follows: correlate1 :: [Double] -> [Double] -> Double correlate1 ks = sum . zipWith (*) ks correlate :: [Double] -> [Double] -> [Double] correlate ks [

[Haskell-cafe] Convolution

2008-11-07 Thread Andrew Coppin
A simple and straight-forward way to define the DSP operations of correlation and convolution is as follows: correlate1 :: [Double] -> [Double] -> Double correlate1 ks = sum . zipWith (*) ks correlate :: [Double] -> [Double] -> [Double] correlate ks [] = [] correlate ks xs = correlate1 ks

Re: [Haskell-cafe] Bit Field Marshalling

2008-11-07 Thread Dan Weston
> C standard allows padding and reorder of struct entries Almost. The ISO C standard does allow structs padding, but *not* reordering: http://www.open-std.org/JTC1/SC22/wg14/www/docs/n1124.pdf ISO/IEC 9899:1999 C Standard ยง6.7.2.1.13 "Within a structure object, the non-bit-field members and the

[Haskell-cafe] Re: Monad.Reader with updates

2008-11-07 Thread Mauricio
> Hi Mauricio. What you want actually already exists in QuickCheck as > the "Gen" monad. > > newtype Gen a > = Gen (Int -> StdGen -> a) > > instance Monad Gen where > return a= Gen (\n r -> a) > Gen m >>= k = > Gen (\n r0 -> let (r1,r2) = split r0 > Gen m' = k

Re: [Haskell-cafe] Re: Monad.Reader with updates

2008-11-07 Thread Brent Yorgey
On Fri, Nov 07, 2008 at 10:41:01AM +0100, Achim Schneider wrote: > > But then, you either want a ReaderT r State s or StateT s Reader r, > depending on how you want to write your code... the main thing that > confuses me right now is that nesting order doesn't seem to matter that > much in this ca

[Haskell-cafe] Re: Bit Field Marshalling

2008-11-07 Thread Achim Schneider
"Michael D. Adams" <[EMAIL PROTECTED]> wrote: > What options are there for working around it? > In case it's feasible, use http://www.matroska.org/technical/specs/rfc/index.html on both sides. I just can't stop to advertise that one. -- (c) this sig last receiving data processing entity. Inspe

[Haskell-cafe] Re: Monad.Reader with updates

2008-11-07 Thread Achim Schneider
Maurcio <[EMAIL PROTECTED]> wrote: > > > >> [...] > >> > > Are you sure you don't want to use monad transformers? > > > > No. Do you have a sugestion on how could I do > it in this situation? > Not really, mainly because if monad transformers don't confuse you you should double-check if yo

Re: [Haskell-cafe] Bit Field Marshalling

2008-11-07 Thread Lutz Donnerhacke
* Michael D. Adams wrote: > But as far as I can tell, hsc2hs doesn't support bit > fields. On top of that I'm not sure I can make any safe assumptions > about what order the bit fields are packed (LSB or MSB first). C standard allows padding and reorder of struct entries in order to match alignme