diff options
Diffstat (limited to 'src/runtime/haskell-bind/PGF2.hsc')
| -rw-r--r-- | src/runtime/haskell-bind/PGF2.hsc | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/runtime/haskell-bind/PGF2.hsc b/src/runtime/haskell-bind/PGF2.hsc index 037145ee6..f2f1b4113 100644 --- a/src/runtime/haskell-bind/PGF2.hsc +++ b/src/runtime/haskell-bind/PGF2.hsc @@ -39,6 +39,7 @@ module PGF2 (-- * PGF mkFloat,unFloat, mkMeta,unMeta, mkCId, + exprHash, treeProbability, -- ** Types @@ -323,6 +324,15 @@ treeProbability (PGF p _) (Expr c_expr touch1) = touch1 return (realToFrac res) +exprHash :: Int32 -> Expr -> Int32 +exprHash h (Expr c_expr touch1) = + unsafePerformIO $ do + h <- pgf_expr_hash (fromIntegral h) c_expr + touch1 + return (fromIntegral h) + + + ----------------------------------------------------------------------------- -- Graphviz |