2 {-# LANGUAGE OverloadedStrings #-}
3 module Mate.Utilities where
6 import qualified Data.Map as M
7 import qualified Data.ByteString.Lazy as B
15 buildMethodID :: Class Direct -> Word16 -> MethodInfo
16 buildMethodID cls idx = MethodInfo (ntName nt) rc (ntSignature nt)
17 where (rc, nt) = case constsPool cls M.! idx of
18 (CMethod rc' nt') -> (rc', nt')
19 (CIfaceMethod rc' nt') -> (rc', nt')
20 _ -> error "buildMethodID: something wrong. abort."
22 buildStaticFieldID :: Class Direct -> Word16 -> StaticFieldInfo
23 buildStaticFieldID cls idx = StaticFieldInfo rc (ntName fnt)
24 where (CField rc fnt) = constsPool cls M.! idx
26 buildFieldOffset :: Class Direct -> Word16 -> (B.ByteString, B.ByteString)
27 buildFieldOffset cls idx = (rc, ntName fnt)
28 where (CField rc fnt) = constsPool cls M.! idx
30 buildClassID :: Class Direct -> Word16 -> B.ByteString
31 buildClassID cls idx = cl
32 where (CClass cl) = constsPool cls M.! idx
34 methodGetArgsCount :: Class Direct -> Word16 -> Word32
35 methodGetArgsCount cls idx = fromIntegral $ length args
37 nt = case constsPool cls M.! idx of
38 (CMethod _ nt') -> nt'
39 (CIfaceMethod _ nt') -> nt'
40 _ -> error "methodGetArgsCount: something wrong. abort."
41 (MethodSignature args _) = ntSignature nt
43 -- TODO(bernhard): Extend it to more than just int, and provide typeinformation
44 methodHaveReturnValue :: Class Direct -> Word16 -> Bool
45 methodHaveReturnValue cls idx = case ret of
47 (Returns BoolType) -> True
48 (Returns CharByte) -> True
49 (Returns IntType) -> True;
50 (Returns (Array _ _)) -> True
51 (Returns (ObjectType _)) -> True;
52 _ -> error $ "methodHaveReturnValue: todo: " ++ show ret
54 nt = case constsPool cls M.! idx of
55 (CMethod _ nt') -> nt'
56 (CIfaceMethod _ nt') -> nt'
57 _ -> error "methodHaveReturnValue: something wrong. abort."
58 (MethodSignature _ ret) = ntSignature nt
60 lookupMethodSig :: B.ByteString -> MethodSignature -> Class Direct -> Maybe (Method Direct)
61 lookupMethodSig name sig cls =
62 find (\x -> methodName x == name && methodSignature x == sig) $ classMethods cls