3 -- These bindings are highly experimental and subject to change
4 -- without notice. You've been warned.
6 module Edu_Berkeley_Sbp_Haskell_SBP(
7 Tree(Tree),Location(Location),Region(Region),parseFile,prettyPrintTree,coalesceFlatHeadlessNodes)
10 #if defined(java_HOST_OS)
13 #define CONCAT(x,y) x/**/y
14 #define DEFINE_OBJECT(s,name) \
15 data CONCAT(name,_); \
16 type name = JObject CONCAT(name,_); \
17 foreign import jvm s CONCAT(_,name) :: JClass; \
18 instance JType_ CONCAT(name,_) where jClass_ _ = CONCAT(_,name);
22 import Class_HaskellHelper;
23 import Class_java_lang_Object;
24 import Class_java_lang_Class;
25 import Class_java_lang_String;
26 import Class_edu_berkeley_sbp_Tree;
27 import Header_edu_berkeley_sbp_Tree;
28 import JVM_HaskellHelper;
29 import Header_HaskellHelper;
37 import Foreign.JavaVM.Lib.Class_java_lang_System;
38 import Foreign.JavaVM.Lib.Class_java_lang_String;
39 import TestCallback_JVM;
40 import Foreign.JavaVM;
41 import Platform.JavaVM;
43 import Control.Concurrent;
46 import Text.PrettyPrint.Leijen
48 data Location = Location Int Int
49 data Region = Region Location Location
51 data Tree = Tree String [Tree] Region
54 show t@(Tree _ _ _) = show $ prettyPrintTree $ t
56 coalesceFlatHeadlessNodes t@(Tree s children r)
57 | s==[], flat t = Tree (concat $ map (\(Tree s _ _) -> s) children) [] r
58 | otherwise = Tree s (map coalesceFlatHeadlessNodes children) r
60 flat (Tree _ children _) = not (any id $ map notFlatComponent children)
61 notFlatComponent (Tree _ [] _) = False
62 notFlatComponent (Tree _ _ _) = True
65 prettyPrintTree (Tree "" [] _) = empty
66 prettyPrintTree (Tree s [] _) = text s
67 prettyPrintTree (Tree [] children _) = prettyPrintTreeList children
68 prettyPrintTree (Tree s children _) = (text (s++":")) <$$> (prettyPrintTreeList children)
69 prettyPrintTreeList [] = text "{}"
70 prettyPrintTreeList children
71 | allsingles children = text $ "\"" ++ (concatMap (\(Tree s _ _) -> s) children) ++ "\""
72 | otherwise = hang 2 $
76 ((fsep $ map (group . prettyPrintTree) children)
79 allsingles = all (\(Tree s c _) -> (length s)==1 && (length c)==0)
81 nullRegion = (Region (Location 0 0) (Location 0 0))
85 ------------------------------------------------------------------------------
86 #if defined(java_HOST_OS)
87 foreign import jvm type "edu.berkeley.sbp.Tree" JTree#
88 data JTree = JTree JTree#
89 foreign import jvm type "java.lang.Object" Object#
90 data Object = Object Object#
91 foreign import jvm safe "edu.berkeley.sbp.misc.RegressionTests.main" regressionTests :: IO ()
92 foreign import jvm safe "HaskellHelper.help" haskellHelper :: JString -> IO JTree
93 foreign import jvm safe "HaskellHelper.isNull" isNull :: Object -> IO Bool
94 foreign import jvm safe "getHead" getHead :: JTree -> IO Object
95 foreign import jvm safe "child" getChild :: JTree -> Int32 -> IO JTree
96 foreign import jvm safe "size" size :: JTree -> IO Int32
97 foreign import jvm safe "toString" jtoString :: Object -> IO JString
99 toString o = do isn <- isNull o
100 if isn then return ""
101 else do str <- jtoString o
102 return (unpackJString str)
105 haskify :: JTree -> IO Tree
109 numChildren <- size t
110 children <- if numChildren == 0
112 else do children <- mapM (\i -> getChild t i)
113 $ take (fromIntegral numChildren)
115 h <- mapM haskify children
117 return $ Tree str children nullRegion
120 String -> -- file to be parsed
123 parseFile f = do f' <- packJString f
124 tree <- haskellHelper f'
128 ------------------------------------------------------------------------------
130 -- Why do I need this?
131 instance SubJavaClassMarker
132 Header_edu_berkeley_sbp_Tree.Class_Jedu_berkeley_sbp_Tree
133 Header_HaskellHelper.Class_Jedu_berkeley_sbp_Tree
136 [String] -> -- class path
137 String -> -- grammar *.g file
138 String -> -- file to be parsed
141 parseFile classPath grammarFile inputFile =
143 ((do class_JHaskellHelper
144 s1 <- new_JString_ArrayJchar $ toJavaString grammarFile
145 s2 <- new_JString_ArrayJchar $ toJavaString inputFile
146 tree <- main_JHaskellHelper_JString_JString (s1, s2)
147 t <- haskifyTree tree
152 ((do class_JHaskellHelper
154 head <- getHead_JTree t ()
155 isNull <- getIsNothing head
158 else (toString_JObject ((castTLRef head) :: Jjava_lang_Object) ()
159 >>= getStringUTF >>= \x -> return (showUTF8 x))
160 numChildren <- size_JTree t()
161 children <- if numChildren == 0
163 else do children <- mapM (\i -> child_JTree_Jint t ((fromIntegral i)::Int32))
164 $ take (fromIntegral numChildren)
166 h <- mapM (\c -> haskifyTree (castTLRef c)) children
168 return $ Tree str children nullRegion