2 {-# LANGUAGE OverloadedStrings #-}
3 module Mate.Utilities where
6 import qualified Data.Map as M
7 import qualified Data.Set as S
8 import qualified Data.ByteString.Lazy as B
15 import Mate.NativeSizes
18 buildMethodID :: Class Direct -> Word16 -> MethodInfo
19 buildMethodID cls idx = MethodInfo (ntName nt) rc (ntSignature nt)
21 (rc, nt) = case constsPool cls M.! idx of
22 (CMethod rc' nt') -> (rc', nt')
23 (CIfaceMethod rc' nt') -> (rc', nt')
24 _ -> error "buildMethodID: something wrong. abort."
26 buildStaticFieldID :: Class Direct -> Word16 -> StaticFieldInfo
27 buildStaticFieldID cls idx = StaticFieldInfo rc (ntName fnt)
28 where (CField rc fnt) = constsPool cls M.! idx
30 buildFieldOffset :: Class Direct -> Word16 -> (B.ByteString, B.ByteString)
31 buildFieldOffset cls idx = (rc, ntName fnt)
32 where (CField rc fnt) = constsPool cls M.! idx
34 buildClassID :: Class Direct -> Word16 -> B.ByteString
35 buildClassID cls idx = cl
36 where (CClass cl) = constsPool cls M.! idx
39 methodNameTypeByIdx :: Class Direct -> Word16 -> NameType (Method Direct)
40 methodNameTypeByIdx cls idx = case constsPool cls M.! idx of
41 (CMethod _ nt') -> nt'
42 (CIfaceMethod _ nt') -> nt'
43 _ -> error "methodGetArgsCount: something wrong. abort."
45 methodGetArgsCount :: NameType (Method Direct) -> NativeWord
46 methodGetArgsCount nt = genericLength args
47 where (MethodSignature args _) = ntSignature nt
49 -- TODO(bernhard): Extend it to more than just int, and provide typeinformation
50 methodHaveReturnValue :: Class Direct -> Word16 -> Bool
51 methodHaveReturnValue cls idx = case ret of
53 (Returns BoolType) -> True
54 (Returns CharByte) -> True
55 (Returns IntType) -> True;
56 (Returns (Array _ _)) -> True
57 (Returns (ObjectType _)) -> True;
58 _ -> error $ "methodHaveReturnValue: todo: " ++ show ret
60 nt = case constsPool cls M.! idx of
61 (CMethod _ nt') -> nt'
62 (CIfaceMethod _ nt') -> nt'
63 _ -> error "methodHaveReturnValue: something wrong. abort."
64 (MethodSignature _ ret) = ntSignature nt
66 methodInfoToMethod :: MethodInfo -> Class Direct -> Method Direct
67 methodInfoToMethod mi cls =
68 fromJust $ lookupMethodSig (methName mi) (methSignature mi) cls
70 methodIsStatic :: Method Direct -> Bool
71 methodIsStatic = S.member ACC_STATIC . methodAccessFlags
73 lookupMethodSig :: B.ByteString -> MethodSignature -> Class Direct -> Maybe (Method Direct)
74 lookupMethodSig name sig cls =
75 find (\x -> methodName x == name && methodSignature x == sig) $ classMethods cls