[project @ 2005-01-28 15:03:06 by simonmar]

[ghc-base.git] / System / Environment.hs

diff --git a/System/Environment.hs b/System/Environment.hs
index 245a9db..3271e29 100644 (file)
--- a/System/Environment.hs
+++ b/System/Environment.hs
@@ -21,6 +21,9 @@ module System.Environment
       withArgs,
       withProgName,
 #endif
+#ifdef __GLASGOW_HASKELL__
+      getEnvironment,
+#endif
   ) where
 
 import Prelude
@@ -31,7 +34,6 @@ import Foreign.C
 import Control.Exception       ( bracket )
 import Control.Monad
 import GHC.IOBase
-#include "config.h"
 #endif
 
 #ifdef __HUGS__
@@ -99,7 +101,7 @@ unpackProgName argv = do
 
    isPathSeparator :: Char -> Bool
    isPathSeparator '/'  = True
-#ifdef mingw32_TARGET_OS 
+#ifdef mingw32_HOST_OS 
    isPathSeparator '\\' = True
 #endif
    isPathSeparator _    = False
@@ -168,4 +170,26 @@ setArgs argv = do
 
 foreign import ccall unsafe "setProgArgv" 
   setArgsPrim  :: Int -> Ptr CString -> IO ()
+
+-- |'getEnvironment' retrieves the entire environment as a
+-- list of @(key,value)@ pairs.
+--
+-- If an environment entry does not contain an @\'=\'@ character,
+-- the @key@ is the whole entry and the @value@ is the empty string.
+
+getEnvironment :: IO [(String, String)]
+getEnvironment = do
+   pBlock <- getEnvBlock
+   if pBlock == nullPtr then return []
+    else do
+      stuff <- peekArray0 nullPtr pBlock >>= mapM peekCString
+      return (map divvy stuff)
+  where
+   divvy str = 
+      case break (=='=') str of
+        (xs,[])        -> (xs,[]) -- don't barf (like Posix.getEnvironment)
+        (name,_:value) -> (name,value)
+
+foreign import ccall unsafe "__hscore_environ" 
+  getEnvBlock :: IO (Ptr CString)
 #endif  /* __GLASGOW_HASKELL__ */