X-Git-Url: http://git.cielonegro.org/gitweb.cgi?a=blobdiff_plain;f=Sound%2FEsounD%2FInternals.hs;h=735ce6324762dd14672a688df383b65515e6e727;hb=080d77f8aece1d14f71f6fd337f0cda9cdf7d740;hp=fcaff1e5e88d84d5c887bf0a45e3d34f93b1e865;hpb=4570a37d1fc8f21a4ee1221c6ed289d281f1b005;p=EsounD.git

diff --git a/Sound/EsounD/Internals.hs b/Sound/EsounD/Internals.hs
index fcaff1e..735ce63 100644
--- a/Sound/EsounD/Internals.hs
+++ b/Sound/EsounD/Internals.hs
@@ -13,13 +13,16 @@ 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
@@ -79,6 +82,9 @@ 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 +97,8 @@ 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 → Bool) → CInt → m CInt
+failOnError msg isErr rv
+    | isErr rv  = fail msg
+    | otherwise = return rv