2 {-# LANGUAGE OverloadedStrings #-}
3 module Mate.Utilities where
6 import qualified Data.Map as M
7 import qualified Data.ByteString.Lazy as B
14 buildMethodID :: Class Direct -> Word16 -> MethodInfo
15 buildMethodID cls idx = MethodInfo (ntName nt) rc (ntSignature nt)
16 where (rc, nt) = case constsPool cls M.! idx of
17 (CMethod rc' nt') -> (rc', nt')
18 (CIfaceMethod rc' nt') -> (rc', nt')
19 _ -> error "buildMethodID: something wrong. abort."
21 buildStaticFieldID :: Class Direct -> Word16 -> StaticFieldInfo
22 buildStaticFieldID cls idx = StaticFieldInfo rc (ntName fnt)
23 where (CField rc fnt) = constsPool cls M.! idx
25 buildFieldOffset :: Class Direct -> Word16 -> (B.ByteString, B.ByteString)
26 buildFieldOffset cls idx = (rc, ntName fnt)
27 where (CField rc fnt) = constsPool cls M.! idx
29 buildClassID :: Class Direct -> Word16 -> B.ByteString
30 buildClassID cls idx = cl
31 where (CClass cl) = constsPool cls M.! idx
33 methodGetArgsCount :: Class Direct -> Word16 -> Word32
34 methodGetArgsCount cls idx = fromIntegral $ length args
36 nt = case constsPool cls M.! idx of
37 (CMethod _ nt') -> nt'
38 (CIfaceMethod _ nt') -> nt'
39 _ -> error "methodGetArgsCount: something wrong. abort."
40 (MethodSignature args _) = ntSignature nt
42 -- TODO(bernhard): Extend it to more than just int, and provide typeinformation
43 methodHaveReturnValue :: Class Direct -> Word16 -> Bool
44 methodHaveReturnValue cls idx = case ret of
46 (Returns IntType) -> True;
47 (Returns (Array _ _)) -> True
48 (Returns (ObjectType _)) -> True;
49 _ -> error $ "methodHaveReturnValue: todo: " ++ show ret
51 nt = case constsPool cls M.! idx of
52 (CMethod _ nt') -> nt'
53 (CIfaceMethod _ nt') -> nt'
54 _ -> error "methodHaveReturnValue: something wrong. abort."
55 (MethodSignature _ ret) = ntSignature nt