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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
{-# OPTIONS -XTypeOperators -XRank2Types -XFlexibleContexts #-}
-----------------------------------------------------------------------------
-- |
-- Module : Data.Packed.ST
-- Copyright : (c) Alberto Ruiz 2008
-- License : GPL-style
--
-- Maintainer : Alberto Ruiz <aruiz@um.es>
-- Stability : provisional
-- Portability : portable
--
-- In-place manipulation inside the ST monad.
-- See examples/inplace.hs in the distribution.
--
-----------------------------------------------------------------------------
module Data.Packed.ST (
-- * Mutable Vectors
STVector, newVector, thawVector, freezeVector, runSTVector,
readVector, writeVector, modifyVector, liftSTVector,
-- * Mutable Matrices
STMatrix, newMatrix, thawMatrix, freezeMatrix, runSTMatrix,
readMatrix, writeMatrix, modifyMatrix, liftSTMatrix,
-- * Unsafe functions
unsafeReadVector, unsafeWriteVector,
unsafeThawVector, unsafeFreezeVector,
unsafeReadMatrix, unsafeWriteMatrix,
unsafeThawMatrix, unsafeFreezeMatrix
) where
import Data.Packed.Internal
import Control.Monad.ST
import Foreign
{-# INLINE ioReadV #-}
ioReadV :: Storable t => Vector t -> Int -> IO t
ioReadV v k = withForeignPtr (fptr v) $ \s -> peekElemOff s k
{-# INLINE ioWriteV #-}
ioWriteV :: Storable t => Vector t -> Int -> t -> IO ()
ioWriteV v k x = withForeignPtr (fptr v) $ \s -> pokeElemOff s k x
newtype STVector s t = STVector (Vector t)
thawVector :: Storable t => Vector t -> ST s (STVector s t)
thawVector = unsafeIOToST . fmap STVector . cloneVector
unsafeThawVector :: Storable t => Vector t -> ST s (STVector s t)
unsafeThawVector = unsafeIOToST . return . STVector
runSTVector :: Storable t => (forall s . ST s (STVector s t)) -> Vector t
runSTVector st = runST (st >>= unsafeFreezeVector)
{-# INLINE unsafeReadVector #-}
unsafeReadVector :: Storable t => STVector s t -> Int -> ST s t
unsafeReadVector (STVector x) = unsafeIOToST . ioReadV x
{-# INLINE unsafeWriteVector #-}
unsafeWriteVector :: Storable t => STVector s t -> Int -> t -> ST s ()
unsafeWriteVector (STVector x) k = unsafeIOToST . ioWriteV x k
{-# INLINE modifyVector #-}
modifyVector :: (Storable t) => STVector s t -> Int -> (t -> t) -> ST s ()
modifyVector x k f = readVector x k >>= return . f >>= unsafeWriteVector x k
liftSTVector :: (Storable t) => (Vector t -> a) -> STVector s1 t -> ST s2 a
liftSTVector f (STVector x) = unsafeIOToST . fmap f . cloneVector $ x
freezeVector :: (Storable t) => STVector s1 t -> ST s2 (Vector t)
freezeVector v = liftSTVector id v
unsafeFreezeVector :: (Storable t) => STVector s1 t -> ST s2 (Vector t)
unsafeFreezeVector (STVector x) = unsafeIOToST . return $ x
{-# INLINE safeIndexV #-}
safeIndexV f (STVector v) k
| k < 0 || k>= dim v = error $ "out of range error in vector (dim="
++show (dim v)++", pos="++show k++")"
| otherwise = f (STVector v) k
{-# INLINE readVector #-}
readVector :: Storable t => STVector s t -> Int -> ST s t
readVector = safeIndexV unsafeReadVector
{-# INLINE writeVector #-}
writeVector :: Storable t => STVector s t -> Int -> t -> ST s ()
writeVector = safeIndexV unsafeWriteVector
{-# NOINLINE newVector #-}
newVector :: Element t => t -> Int -> ST s (STVector s t)
newVector v = unsafeThawVector . constant v
-------------------------------------------------------------------------
{-# INLINE ioReadM #-}
ioReadM :: Storable t => Matrix t -> Int -> Int -> IO t
ioReadM (MC _ nc cv) r c = ioReadV cv (r*nc+c)
ioReadM (MF nr _ fv) r c = ioReadV fv (c*nr+r)
{-# INLINE ioWriteM #-}
ioWriteM :: Storable t => Matrix t -> Int -> Int -> t -> IO ()
ioWriteM (MC _ nc cv) r c val = ioWriteV cv (r*nc+c) val
ioWriteM (MF nr _ fv) r c val = ioWriteV fv (c*nr+r) val
newtype STMatrix s t = STMatrix (Matrix t)
thawMatrix :: Storable t => Matrix t -> ST s (STMatrix s t)
thawMatrix = unsafeIOToST . fmap STMatrix . cloneMatrix
unsafeThawMatrix :: Storable t => Matrix t -> ST s (STMatrix s t)
unsafeThawMatrix = unsafeIOToST . return . STMatrix
runSTMatrix :: Storable t => (forall s . ST s (STMatrix s t)) -> Matrix t
runSTMatrix st = runST (st >>= unsafeFreezeMatrix)
{-# INLINE unsafeReadMatrix #-}
unsafeReadMatrix :: Storable t => STMatrix s t -> Int -> Int -> ST s t
unsafeReadMatrix (STMatrix x) r = unsafeIOToST . ioReadM x r
{-# INLINE unsafeWriteMatrix #-}
unsafeWriteMatrix :: Storable t => STMatrix s t -> Int -> Int -> t -> ST s ()
unsafeWriteMatrix (STMatrix x) r c = unsafeIOToST . ioWriteM x r c
{-# INLINE modifyMatrix #-}
modifyMatrix :: (Storable t) => STMatrix s t -> Int -> Int -> (t -> t) -> ST s ()
modifyMatrix x r c f = readMatrix x r c >>= return . f >>= unsafeWriteMatrix x r c
liftSTMatrix :: (Storable t) => (Matrix t -> a) -> STMatrix s1 t -> ST s2 a
liftSTMatrix f (STMatrix x) = unsafeIOToST . fmap f . cloneMatrix $ x
unsafeFreezeMatrix :: (Storable t) => STMatrix s1 t -> ST s2 (Matrix t)
unsafeFreezeMatrix (STMatrix x) = unsafeIOToST . return $ x
freezeMatrix :: (Storable t) => STMatrix s1 t -> ST s2 (Matrix t)
freezeMatrix m = liftSTMatrix id m
cloneMatrix (MC r c d) = cloneVector d >>= return . MC r c
cloneMatrix (MF r c d) = cloneVector d >>= return . MF r c
{-# INLINE safeIndexM #-}
safeIndexM f (STMatrix m) r c
| r<0 || r>=rows m ||
c<0 || c>=cols m = error $ "out of range error in matrix (size="
++show (rows m,cols m)++", pos="++show (r,c)++")"
| otherwise = f (STMatrix m) r c
{-# INLINE readMatrix #-}
readMatrix :: Storable t => STMatrix s t -> Int -> Int -> ST s t
readMatrix = safeIndexM unsafeReadMatrix
{-# INLINE writeMatrix #-}
writeMatrix :: Storable t => STMatrix s t -> Int -> Int -> t -> ST s ()
writeMatrix = safeIndexM unsafeWriteMatrix
{-# NOINLINE newMatrix #-}
newMatrix :: Element t => t -> Int -> Int -> ST s (STMatrix s t)
newMatrix v r c = unsafeThawMatrix . reshape c . constant v $ r*c
|
