1 {-# LANGUAGE OverloadedStrings #-}
2 module Mate.Utilities where
5 import qualified Data.Map as M
6 import qualified Data.ByteString.Lazy as B
13 -- TODO: actually this function already exists in hs-java-0.3!
14 lookupMethod :: B.ByteString -> Class Resolved -> Maybe (Method Resolved)
15 lookupMethod name cls = look (classMethods cls)
19 | methodName f == name = Just f
22 buildMethodID :: Class Resolved -> Word16 -> MethodInfo
23 buildMethodID cls idx = MethodInfo (ntName nt) rc (ntSignature nt)
25 (CMethod rc nt) = (constsPool cls) M.! idx
27 methodGetArgsCount :: Class Resolved -> Word16 -> Word32
28 methodGetArgsCount cls idx = fromIntegral $ length args
30 (CMethod _ nt) = (constsPool cls) M.! idx
31 (MethodSignature args _) = ntSignature nt
33 -- TODO(bernhard): Extend it to more than just int, and provide typeinformation
34 methodHaveReturnValue :: Class Resolved -> Word16 -> Bool
35 methodHaveReturnValue cls idx = case ret of
37 (Returns IntType) -> True;
38 _ -> error "methodHaveReturnValue: todo"
40 (CMethod _ nt) = (constsPool cls) M.! idx
41 (MethodSignature _ ret) = ntSignature nt