Fix segfault in array copy primops on 32-bit

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

diff --git a/compiler/utils/Util.lhs b/compiler/utils/Util.lhs
index 6b17a28..dc4f32e 100644 (file)
--- a/compiler/utils/Util.lhs
+++ b/compiler/utils/Util.lhs
@@ -66,6 +66,9 @@ module Util (
         -- * Floating point
         readRational,
 
+        -- * read helpers
+        maybeReadFuzzy,
+
         -- * IO-ish utilities
         createDirectoryHierarchy,
         doesDirNameExist,
@@ -81,7 +84,10 @@ module Util (
         Direction(..), reslash,
 
         -- * Utils for defining Data instances
-        abstractConstr, abstractDataType, mkNoRepType
+        abstractConstr, abstractDataType, mkNoRepType,
+
+        -- * Utils for printing C code
+        charToC
     ) where
 
 #include "HsVersions.h"
@@ -106,7 +112,7 @@ import System.Directory ( doesDirectoryExist, createDirectory,
 import System.FilePath
 import System.Time      ( ClockTime )
 
-import Data.Char        ( isUpper, isAlphaNum, isSpace, ord, isDigit )
+import Data.Char        ( isUpper, isAlphaNum, isSpace, chr, ord, isDigit )
 import Data.Ratio       ( (%) )
 import Data.Ord         ( comparing )
 import Data.Bits
@@ -963,6 +969,17 @@ readRational top_s
 
 
 -----------------------------------------------------------------------------
+-- read helpers
+
+maybeReadFuzzy :: Read a => String -> Maybe a
+maybeReadFuzzy str = case reads str of
+                     [(x, s)]
+                      | all isSpace s ->
+                         Just x
+                     _ ->
+                         Nothing
+
+-----------------------------------------------------------------------------
 -- Create a hierarchy of directories
 
 createDirectoryHierarchy :: FilePath -> IO ()
@@ -1066,3 +1083,22 @@ abstractDataType :: String -> DataType
 abstractDataType n = mkDataType n [abstractConstr n]
 \end{code}
 
+%************************************************************************
+%*                                                                      *
+\subsection[Utils-C]{Utils for printing C code}
+%*                                                                      *
+%************************************************************************
+
+\begin{code}
+charToC :: Word8 -> String
+charToC w = 
+  case chr (fromIntegral w) of
+       '\"' -> "\\\""
+       '\'' -> "\\\'"
+       '\\' -> "\\\\"
+       c | c >= ' ' && c <= '~' -> [c]
+          | otherwise -> ['\\',
+                         chr (ord '0' + ord c `div` 64),
+                         chr (ord '0' + ord c `div` 8 `mod` 8),
+                         chr (ord '0' + ord c         `mod` 8)]
+\end{code}