conversion from/to Data.Vector.Storable

1 files changed, 29 insertions, 0 deletions

diff --git a/examples/vector.hs b/examples/vector.hs
new file mode 100644
index 0000000..12cbc42
--- /dev/null
+++ b/examples/vector.hs
@@ -0,0 +1,29 @@
+-- conversion to/from Data.Vector.Storable
+-- from Roman Leshchinskiy "vector" package
+--
+-- In the future Data.Packed.Vector will be replaced by Data.Vector.Storable
+
+-------------------------------------------
+
+import Data.Packed as H
+import Data.Packed.Development(unsafeFromForeignPtr, unsafeToForeignPtr)
+import Foreign.Storable
+import qualified Data.Vector.Storable as V
+
+fromVector :: Storable t => V.Vector t -> H.Vector t
+fromVector v = unsafeFromForeignPtr p i n where
+    (p,i,n) = V.unsafeToForeignPtr (V.copy v)
+
+toVector :: H.Vector t -> V.Vector t
+toVector v = V.unsafeFromForeignPtr p i n where
+    (p,i,n) = unsafeToForeignPtr v
+
+-------------------------------------------
+
+v = V.slice 5 10 (V.fromList [1 .. 10::Double] V.++ V.replicate 10 7)
+
+w = linspace 5 (0,2)
+
+main = do
+    print $ fromVector v
+    print $ toVector w