1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
{-# OPTIONS_GHC -fglasgow-exts #-}
-----------------------------------------------------------------------------
-- |
-- Module : Data.Packed.Internal.Vector
-- Copyright : (c) Alberto Ruiz 2007
-- License : GPL-style
--
-- Maintainer : Alberto Ruiz <aruiz@um.es>
-- Stability : provisional
-- Portability : portable (uses FFI)
--
-- Vector implementation
--
-----------------------------------------------------------------------------
module Data.Packed.Internal.Vector where
import Data.Packed.Internal.Common
import Foreign
import Complex
import Control.Monad(when)
type Vc t s = Int -> Ptr t -> s
-- not yet admitted by my haddock version
-- infixr 5 :>
-- type t :> s = Vc t s
vec :: Vector t -> (Vc t s) -> s
vec v f = f (dim v) (ptr v)
baseOf v = (v `at` 0)
createVector :: Storable a => Int -> IO (Vector a)
createVector n = do
when (n <= 0) $ error ("trying to createVector of dim "++show n)
fp <- mallocForeignPtrArray n
let p = unsafeForeignPtrToPtr fp
--putStrLn ("\n---------> V"++show n)
return $ V n fp p
fromList :: Storable a => [a] -> Vector a
fromList l = unsafePerformIO $ do
v <- createVector (length l)
let f _ p = pokeArray p l >> return 0
f // vec v // check "fromList" []
return v
toList :: Storable a => Vector a -> [a]
toList v = unsafePerformIO $ peekArray (dim v) (ptr v)
n |> l = if length l == n then fromList l else error "|> with wrong size"
at' :: Storable a => Vector a -> Int -> a
at' v n = unsafePerformIO $ peekElemOff (ptr v) n
at :: Storable a => Vector a -> Int -> a
at v n | n >= 0 && n < dim v = at' v n
| otherwise = error "vector index out of range"
instance (Show a, Storable a) => (Show (Vector a)) where
show v = (show (dim v))++" |> " ++ show (toList v)
-- | creates a Vector taking a number of consecutive toList from another Vector
subVector :: Storable t => Int -- ^ index of the starting element
-> Int -- ^ number of toList to extract
-> Vector t -- ^ source
-> Vector t -- ^ result
subVector k l (v@V {dim=n, ptr=p, fptr=fp})
| k<0 || k >= n || k+l > n || l < 0 = error "subVector out of range"
| otherwise = unsafePerformIO $ do
r <- createVector l
let f = copyArray (ptr r) (advancePtr p k) l >> return 0
f // check "subVector" [v]
return r
subVector' k l (v@V {dim=n, ptr=p, fptr=fp})
| k<0 || k >= n || k+l > n || l < 0 = error "subVector out of range"
| otherwise = v {dim=l, ptr=advancePtr p k}
-- | creates a new Vector by joining a list of Vectors
join :: Field t => [Vector t] -> Vector t
join [] = error "joining zero vectors"
join as = unsafePerformIO $ do
let tot = sum (map dim as)
r@V {fptr = p, ptr = p'} <- createVector tot
withForeignPtr p $ \_ ->
joiner as tot p'
return r
where joiner [] _ _ = return ()
joiner (V {dim = n, fptr = b, ptr = q} : cs) _ p = do
withForeignPtr b $ \_ -> copyArray p q n
joiner cs 0 (advancePtr p n)
-- | transforms a complex vector into a real vector with alternating real and imaginary parts
asReal :: Vector (Complex Double) -> Vector Double
asReal v = V { dim = 2*dim v, fptr = castForeignPtr (fptr v), ptr = castPtr (ptr v) }
-- | transforms a real vector into a complex vector with alternating real and imaginary parts
asComplex :: Vector Double -> Vector (Complex Double)
asComplex v = V { dim = dim v `div` 2, fptr = castForeignPtr (fptr v), ptr = castPtr (ptr v) }
constantG x n = fromList (replicate n x)
constantR :: Double -> Int -> Vector Double
constantR = constantAux cconstantR
constantC :: Complex Double -> Int -> Vector (Complex Double)
constantC = constantAux cconstantC
constantAux fun x n = unsafePerformIO $ do
v <- createVector n
px <- newArray [x]
fun px // vec v // check "constantAux" []
free px
return v
foreign import ccall safe "aux.h constantR"
cconstantR :: Ptr Double -> TV -- Double :> IO Int
foreign import ccall safe "aux.h constantC"
cconstantC :: Ptr (Complex Double) -> TCV -- Complex Double :> IO Int
constant :: Field a => a -> Int -> Vector a
constant x n | isReal id x = scast $ constantR (scast x) n
| isComp id x = scast $ constantC (scast x) n
| otherwise = constantG x n
liftVector :: (Storable a, Storable b) => (a-> b) -> Vector a -> Vector b
liftVector f = fromList . map f . toList
liftVector2 :: (Storable a, Storable b, Storable c) => (a-> b -> c) -> Vector a -> Vector b -> Vector c
liftVector2 f u v = fromList $ zipWith f (toList u) (toList v)
|
