[project @ 2002-04-24 16:31:37 by simonmar]

[ghc-base.git] / Foreign / Ptr.hs

diff --git a/Foreign/Ptr.hs b/Foreign/Ptr.hs
index ca6ed10..7d75e69 100644 (file)
--- a/Foreign/Ptr.hs
+++ b/Foreign/Ptr.hs
@@ -1,6 +1,6 @@
 {-# OPTIONS -fno-implicit-prelude #-}
 -----------------------------------------------------------------------------
--- 
+-- |
 -- Module      :  Foreign.Ptr
 -- Copyright   :  (c) The FFI task force 2001
 -- License     :  BSD-style (see the file libraries/core/LICENSE)
@@ -9,7 +9,7 @@
 -- Stability   :  provisional
 -- Portability :  portable
 --
--- $Id: Ptr.hs,v 1.2 2001/07/03 11:37:50 simonmar Exp $
+-- $Id: Ptr.hs,v 1.7 2002/04/24 16:31:44 simonmar Exp $
 --
 -- Pointer types.
 --
@@ -40,16 +40,32 @@ module Foreign.Ptr (
 
  ) where
 
-import Data.Dynamic
-
 #ifdef __GLASGOW_HASKELL__
 import GHC.Ptr
 import GHC.IOBase
 import GHC.Err
+import GHC.Base
+import GHC.Num
+import GHC.List
+import GHC.Show
+import Numeric
 #endif
 
-foreign import "freeHaskellFunctionPtr" unsafe
-    freeHaskellFunPtr :: FunPtr a -> IO ()
+#include "MachDeps.h"
+
+#ifdef __GLASGOW_HASKELL__
+#if (WORD_SIZE_IN_BITS == 32 || WORD_SIZE_IN_BITS == 64)
+instance Show (Ptr a) where
+   showsPrec p (Ptr a) rs = pad_out (showHex (word2Integer(int2Word#(addr2Int# a))) "") rs
+     where
+        -- want 0s prefixed to pad it out to a fixed length.
+       pad_out ('0':'x':ls) rs = 
+         '0':'x':(replicate (2*SIZEOF_HSPTR - length ls) '0') ++ ls ++ rs
+       -- word2Integer :: Word# -> Integer (stolen from Word.lhs)
+       word2Integer w = case word2Integer# w of
+                       (# s, d #) -> J# s d
+#endif
+#endif
 
-#include "Dynamic.h"
-INSTANCE_TYPEABLE1(Ptr,ptrTc,"Ptr")
+foreign import ccall unsafe "freeHaskellFunctionPtr"
+    freeHaskellFunPtr :: FunPtr a -> IO ()