X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Futils%2FStringBuffer.lhs;h=5d1bfa60861781e17bf8528ad1bb7e33bdeceebd;hp=1aead2d74becab083e66257dba8cba551456b77e;hb=5289f5d85610f71625a439747a09384876655eb5;hpb=2a21b894d36ad83797bd46aa683297c3d466d3bb

diff --git a/compiler/utils/StringBuffer.lhs b/compiler/utils/StringBuffer.lhs
index 1aead2d..5d1bfa6 100644
--- a/compiler/utils/StringBuffer.lhs
+++ b/compiler/utils/StringBuffer.lhs
@@ -6,6 +6,7 @@
 Buffers for scanning string input stored in external arrays.
 
 \begin{code}
+{-# LANGUAGE BangPatterns #-}
 {-# OPTIONS_GHC -O -funbox-strict-fields #-}
 -- We always optimise this, otherwise performance of a non-optimised
 -- compiler is severely affected
@@ -138,8 +139,9 @@ appendStringBuffers sb1 sb2
           calcLen sb = len sb - cur sb
           size =  sb1_len + sb2_len
 
-stringToStringBuffer :: String -> IO StringBuffer
-stringToStringBuffer str = do
+stringToStringBuffer :: String -> StringBuffer
+stringToStringBuffer str =
+ unsafePerformIO $ do
   let size = utf8EncodedLength str
   buf <- mallocForeignPtrArray (size+3)
   withForeignPtr buf $ \ptr -> do
@@ -224,7 +226,7 @@ parseUnsignedInteger (StringBuffer buf _ cur) len radix char_to_int
     --LOL, in implementations where the indexing needs slow unsafePerformIO,
     --this is less (not more) efficient than using the IO monad explicitly
     --here.
-    ptr' = pUnbox ptr
+    !ptr' = pUnbox ptr
     byteOff i = cBox (indexWord8OffFastPtrAsFastChar ptr' (iUnbox (cur + i)))
     go i x | i == len  = x
            | otherwise = case byteOff i of