X-Git-Url: http://git.cielonegro.org/gitweb.cgi?p=EsounD.git;a=blobdiff_plain;f=Sound%2FEsounD%2FInternals.hs;h=f4b067f0903cf30fc9a23b62ccb13dee41c5e4fe;hp=fcaff1e5e88d84d5c887bf0a45e3d34f93b1e865;hb=808cc2f4700bc0b2f77cee443dd237d415b4d5d7;hpb=4570a37d1fc8f21a4ee1221c6ed289d281f1b005

diff --git a/Sound/EsounD/Internals.hs b/Sound/EsounD/Internals.hs
index fcaff1e..f4b067f 100644
--- a/Sound/EsounD/Internals.hs
+++ b/Sound/EsounD/Internals.hs
@@ -13,18 +13,22 @@ module Sound.EsounD.Internals
     , interleave
     , deinterleave
 
+    , toLSV
     , wrapSocket
     , closeSocket
     , withCStrOrNull
+    , failOnError
     )
     where
 import Bindings.EsounD
 import Data.Int
+import Data.StorableVector      as S
 import Data.StorableVector.Lazy as L
 import Foreign.C.String
 import Foreign.C.Types
 import Foreign.Ptr
 import Foreign.Storable
+import Prelude.Unicode
 import System.IO
 import System.Posix.IO
 import System.Posix.Types
@@ -79,6 +83,9 @@ deinterleave v
               (L.cons lFr l', L.cons rFr r')
 
 -- Utility functions
+toLSV ∷ Storable α ⇒ S.Vector α → L.Vector α
+toLSV v = L.fromChunks [v]
+
 wrapSocket ∷ String → CInt → IO Handle
 wrapSocket e (-1) = fail e
 wrapSocket _ fd   = fdToHandle (Fd fd)
@@ -91,3 +98,8 @@ closeSocket h = do (Fd fd) ← handleToFd h
 withCStrOrNull ∷ Maybe String → (CString → IO a) → IO a
 withCStrOrNull Nothing  f = f nullPtr
 withCStrOrNull (Just s) f = withCString s f
+
+failOnError ∷ Monad m ⇒ String → CInt → m ()
+failOnError msg rv
+    | rv ≤ 0   = fail msg
+    | otherwise = return ()