[project @ 1998-12-02 13:17:09 by simonm]

[ghc-hetmet.git] / ghc / compiler / utils / PrimPacked.lhs

diff --git a/ghc/compiler/utils/PrimPacked.lhs b/ghc/compiler/utils/PrimPacked.lhs
index 1021645..153ff5d 100644 (file)
--- a/ghc/compiler/utils/PrimPacked.lhs
+++ b/ghc/compiler/utils/PrimPacked.lhs
@@ -1,5 +1,5 @@
 %
-% (c) The GRASP/AQUA Project, Glasgow University, 1997
+% (c) The GRASP/AQUA Project, Glasgow University, 1997-1998
 %
 \section{Basic ops on packed representations}
 
@@ -22,8 +22,7 @@ module PrimPacked
         eqCharStrPrefixBA,  -- :: Addr# -> ByteArray# -> Int# -> Int# -> Bool
         eqStrPrefixFO,      -- :: ForeignObj# -> ByteArray# -> Int# -> Int# -> Bool
 
-        addrOffset#,        -- :: Addr# -> Int# -> Addr# 
-        indexCharOffFO#     -- :: ForeignObj# -> Int# -> Char#
+        addrOffset#         -- :: Addr# -> Int# -> Addr# 
        ) where
 
 -- This #define suppresses the "import FastString" that
@@ -33,12 +32,25 @@ module PrimPacked
 
 import GlaExts
 import Addr    ( Addr(..) )
-import GHC
-import ArrBase
 import ST
+import Foreign
+-- ForeignObj is now exported abstractly.
+#if __GLASGOW_HASKELL__ >= 303
+import PrelForeign   ( ForeignObj(..) )
+#endif
+
+#if __GLASGOW_HASKELL__ < 301
+import ArrBase         ( StateAndMutableByteArray#(..), 
+                         StateAndByteArray#(..) )
 import STBase
-import IOBase  ( ForeignObj(..) )
-import PackBase ( unpackCStringBA, packString )
+#elif __GLASGOW_HASKELL__ < 400
+import PrelArr         ( StateAndMutableByteArray#(..), 
+                         StateAndByteArray#(..) )
+import PrelST
+#else
+import PrelST
+#endif
+
 \end{code} 
 
 Return the length of a @\\NUL@ terminated character string:
@@ -122,21 +134,10 @@ copySubStrFO (ForeignObj fo) (I# start#) len@(I# length#) =
       = write_ps_array arr_in# idx (chr# 0#) `seqStrictlyST`
        returnStrictlyST ()
       | otherwise
-      = case (indexCharOffFO# fo (idx +# start#)) of { ch ->
+      = case (indexCharOffForeignObj# fo (idx +# start#)) of { ch ->
        write_ps_array arr_in# idx ch `seqStrictlyST`
        fill_in arr_in# (idx +# 1#) }
 
-{- ToDo: add FO primitives.. -}
-#if defined(__GLASGOW_HASKELL__) && __GLASGOW_HASKELL__ <=205
-indexCharOffFO# :: ForeignObj# -> Int# -> Char#
-indexCharOffFO# fo# i# = 
-  case unsafePerformIO (_casm_ ``%r=(char)*((char *)%0 + (int)%1); '' (ForeignObj fo#) (I# i#)) of
-    C# c -> c
-#else
-indexCharOffFO# :: ForeignObj# -> Int# -> Char#
-indexCharOffFO# fo i = indexCharOffForeignObj# fo i
-#endif
-
 -- step on (char *) pointer by x units.
 addrOffset# :: Addr# -> Int# -> Addr# 
 addrOffset# a# i# =
@@ -177,19 +178,33 @@ write_ps_array    :: MutableByteArray s Int -> Int# -> Char# -> ST s ()
 freeze_ps_array :: MutableByteArray s Int -> Int# -> ST s (ByteArray Int)
 
 new_ps_array size = ST $ \ s ->
+#if __GLASGOW_HASKELL__ < 400
     case (newCharArray# size s)          of { StateAndMutableByteArray# s2# barr# ->
     STret s2# (MutableByteArray bot barr#) }
+#else
+    case (newCharArray# size s)          of { (# s2#, barr# #) ->
+    (# s2#, MutableByteArray bot barr# #) }
+#endif
   where
     bot = error "new_ps_array"
 
 write_ps_array (MutableByteArray _ barr#) n ch = ST $ \ s# ->
     case writeCharArray# barr# n ch s# of { s2#   ->
+#if __GLASGOW_HASKELL__ < 400
     STret s2# () }
+#else
+    (# s2#, () #) }
+#endif
 
 -- same as unsafeFreezeByteArray
 freeze_ps_array (MutableByteArray _ arr#) len# = ST $ \ s# ->
+#if __GLASGOW_HASKELL__ < 400
     case unsafeFreezeByteArray# arr# s# of { StateAndByteArray# s2# frozen# ->
     STret s2# (ByteArray (0,I# len#) frozen#) }
+#else
+    case unsafeFreezeByteArray# arr# s# of { (# s2#, frozen# #) ->
+    (# s2#, ByteArray (0,I# len#) frozen# #) }
+#endif
 \end{code}
 
 
@@ -210,9 +225,6 @@ eqCharStrPrefix a1# a2# len# =
   unsafePerformIO (
    _ccall_ strncmp (A# a1#) (A# a2#) (I# len#) >>= \ (I# x#) ->
    return (x# ==# 0#))
-  where
-   bottom :: (Int,Int)
-   bottom = error "eqStrPrefix"
 
 eqStrPrefixBA :: ByteArray# -> ByteArray# -> Int# -> Int# -> Bool
 eqStrPrefixBA b1# b2# start# len# = 
@@ -253,14 +265,3 @@ eqStrPrefixFO fo# barr# start# len# =
    bottom :: (Int,Int)
    bottom = error "eqStrPrefixFO"
 \end{code}
-
-\begin{code}
-byteArrayToString :: ByteArray Int -> String
-byteArrayToString = unpackCStringBA
-\end{code}
-
-
-\begin{code}
-stringToByteArray :: String -> (ByteArray Int)
-stringToByteArray = packString
-\end{code}