X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=blobdiff_plain;f=Mate%2FStrings.hs;h=2f7504ac2aa4a24daf2db17fb1081273b49004a9;hb=ccc1ff2921984cfd36595e935e3634842fa2cb7d;hp=f1762b0a5ae1e9790639b69857ebf9bc5e9f9e82;hpb=4c504fbb0b276782af6cd250e5e9fd4fdcc26967;p=mate.git

diff --git a/Mate/Strings.hs b/Mate/Strings.hs
index f1762b0..2f7504a 100644
--- a/Mate/Strings.hs
+++ b/Mate/Strings.hs
@@ -15,16 +15,17 @@ import Text.Printf
 
 import JVM.ClassFile
 
-import Foreign.Ptr
-import Foreign.Marshal.Utils
-import Foreign.Marshal.Array
+import Foreign
+import Foreign.C.Types
 
 import Mate.Types
+import Mate.NativeSizes
+import Mate.ClassPool
 import Mate.Debug
 import Mate.GarbageAlloc
 
 
-getUniqueStringAddr :: B.ByteString -> IO Word32
+getUniqueStringAddr :: B.ByteString -> IO NativeWord
 getUniqueStringAddr str = do
   smap <- getStringMap
   case M.lookup str smap of
@@ -34,15 +35,52 @@ getUniqueStringAddr str = do
       return addr
     Just addr -> return addr
 
-allocateJavaString :: B.ByteString -> IO Word32
+allocateJavaString :: B.ByteString -> IO NativeWord
 allocateJavaString str = do
-  -- TODO(bernhard): is this also true for UTF8 stuff?
+  {- we have to build a java object layout here, where String object looks like
+   -
+   -  this -+
+   -        |
+   -        v
+   -  +-------------+-------+-------+----------------+--------+
+   -  | MethodTable | value | count | cachedhashcode | offset |
+   -  +-------------+-------+-------+----------------+--------+
+   -        |           |
+   -        |           +------------+
+   -        v                        v
+   -  java/lang/String           +--------+--------+--------+-----+------------------+
+   -                             | length | str[0] | str[1] | ... | str [length - 1] |
+   -                             +--------+--------+--------+-----+------------------+
+   -  all cells are 32bit wide, except str[i] of course (they're 8bit [but
+   -  should be 16bit, TODO]).
+   -}
+  -- build object layout
+  fsize <- getObjectSize "java/lang/String"
+  printfStr "string: fsize: %d (should be 4 * 5)\n" fsize
+  tblptr <- mallocObjectUnmanaged $ fromIntegral fsize
+  let ptr = intPtrToPtr (fromIntegral tblptr) :: Ptr CPtrdiff
+  mtbl <- getMethodTable "java/lang/String"
+  poke ptr $ fromIntegral mtbl
+
+  -- build array layout
   let strlen = fromIntegral $ B.length str
+  -- (+1) for \0, (+4) for length
+  newstr <- mallocStringUnmanaged (strlen + 5) --[TODO hs,bernhard: should be managed right?]
+  BI.memset newstr 0 (fromIntegral $ strlen + 5)
   arr <- newArray ((map fromIntegral $ B.unpack str) :: [Word8])
-  -- (+1) for \0
-  newstr <- mallocString (strlen + 1)
-  BI.memset newstr 0 (fromIntegral $ strlen + 1)
-  copyBytes newstr arr strlen
-  let w32_ptr = fromIntegral $ ptrToIntPtr newstr
-  printfStr "new str ptr: 0x%08x (%s)@%d\n" w32_ptr (toString str) strlen
-  return w32_ptr
+  copyBytes (plusPtr newstr 4) arr strlen
+  printfStr "new str ptr: (%s)@%d\n" (toString str) strlen
+
+  let newstr_length = castPtr newstr :: Ptr CPtrdiff
+  poke newstr_length $ fromIntegral strlen
+
+  -- set value pointer
+  poke (plusPtr ptr 4) (fromIntegral (ptrToIntPtr newstr) :: CPtrdiff)
+  -- set count field
+  poke (plusPtr ptr 8) (fromIntegral strlen :: CPtrdiff)
+  -- set hash code (TODO)
+  poke (plusPtr ptr 12) (0 :: CPtrdiff)
+  -- set offset
+  poke (plusPtr ptr 16) (0 :: CPtrdiff)
+
+  return $ fromIntegral tblptr