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)
18 (rc, nt) = case constsPool cls M.! idx of
19 (CMethod rc' nt') -> (rc', nt')
20 (CIfaceMethod rc' nt') -> (rc', nt')
21 _ -> error "buildMethodID: something wrong. abort."
23 buildStaticFieldID :: Class Direct -> Word16 -> StaticFieldInfo
24 buildStaticFieldID cls idx = StaticFieldInfo rc (ntName fnt)
25 where (CField rc fnt) = constsPool cls M.! idx
27 buildFieldOffset :: Class Direct -> Word16 -> (B.ByteString, B.ByteString)
28 buildFieldOffset cls idx = (rc, ntName fnt)
29 where (CField rc fnt) = constsPool cls M.! idx
31 buildClassID :: Class Direct -> Word16 -> B.ByteString
32 buildClassID cls idx = cl
33 where (CClass cl) = constsPool cls M.! idx
35 methodGetArgsCount :: Class Direct -> Word16 -> Word32
36 methodGetArgsCount cls idx = fromIntegral $ length args
38 nt = case constsPool cls M.! idx of
39 (CMethod _ nt') -> nt'
40 (CIfaceMethod _ nt') -> nt'
41 _ -> error "methodGetArgsCount: something wrong. abort."
42 (MethodSignature args _) = ntSignature nt
44 -- TODO(bernhard): Extend it to more than just int, and provide typeinformation
45 methodHaveReturnValue :: Class Direct -> Word16 -> Bool
46 methodHaveReturnValue cls idx = case ret of
48 (Returns BoolType) -> True
49 (Returns CharByte) -> True
50 (Returns IntType) -> True;
51 (Returns (Array _ _)) -> True
52 (Returns (ObjectType _)) -> True;
53 _ -> error $ "methodHaveReturnValue: todo: " ++ show ret
55 nt = case constsPool cls M.! idx of
56 (CMethod _ nt') -> nt'
57 (CIfaceMethod _ nt') -> nt'
58 _ -> error "methodHaveReturnValue: something wrong. abort."
59 (MethodSignature _ ret) = ntSignature nt
61 lookupMethodSig :: B.ByteString -> MethodSignature -> Class Direct -> Maybe (Method Direct)
62 lookupMethodSig name sig cls =
63 find (\x -> methodName x == name && methodSignature x == sig) $ classMethods cls