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|
-- Module : Numeric.GSL.Internal
-- Copyright : (c) Alberto Ruiz 2009
-- License : GPL
--
-- Maintainer : Alberto Ruiz (aruiz at um dot es)
-- Stability : provisional
-- Portability : uses ffi
--
-- Auxiliary functions.
--
-- #hide
module Numeric.GSL.Internal where
import Data.Packed.Internal
import Foreign.Marshal.Array(copyArray)
import Foreign.Ptr(Ptr, FunPtr)
import Foreign.C.Types
import System.IO.Unsafe(unsafePerformIO)
iv :: (Vector Double -> Double) -> (CInt -> Ptr Double -> Double)
iv f n p = f (createV (fromIntegral n) copy "iv") where
copy n' q = do
copyArray q p (fromIntegral n')
return 0
-- | conversion of Haskell functions into function pointers that can be used in the C side
foreign import ccall safe "wrapper"
mkVecfun :: (CInt -> Ptr Double -> Double)
-> IO( FunPtr (CInt -> Ptr Double -> Double))
foreign import ccall safe "wrapper"
mkVecVecfun :: TVV -> IO (FunPtr TVV)
foreign import ccall safe "wrapper"
mkDoubleVecVecfun :: (Double -> TVV) -> IO (FunPtr (Double -> TVV))
foreign import ccall safe "wrapper"
mkDoublefun :: (Double -> Double) -> IO (FunPtr (Double -> Double))
aux_vTov :: (Vector Double -> Vector Double) -> TVV
aux_vTov f n p nr r = g where
v = f x
x = createV (fromIntegral n) copy "aux_vTov"
copy n' q = do
copyArray q p (fromIntegral n')
return 0
g = do unsafeWith v $ \p' -> copyArray r p' (fromIntegral nr)
return 0
foreign import ccall safe "wrapper"
mkVecMatfun :: TVM -> IO (FunPtr TVM)
foreign import ccall safe "wrapper"
mkDoubleVecMatfun :: (Double -> TVM) -> IO (FunPtr (Double -> TVM))
aux_vTom :: (Vector Double -> Matrix Double) -> TVM
aux_vTom f n p rr cr r = g where
v = flatten $ f x
x = createV (fromIntegral n) copy "aux_vTov"
copy n' q = do
copyArray q p (fromIntegral n')
return 0
g = do unsafeWith v $ \p' -> copyArray r p' (fromIntegral $ rr*cr)
return 0
createV n fun msg = unsafePerformIO $ do
r <- createVector n
app1 fun vec r msg
return r
createMIO r c fun msg = do
res <- createMatrix RowMajor r c
app1 fun mat res msg
return res
|
