2 -- Simple module providing some types used by Translator. These are in a
3 -- separate module to prevent circular dependencies in Pretty for example.
5 module TranslatorTypes where
7 import qualified Control.Monad.State as State
8 import qualified Data.Map as Map
10 import qualified HscTypes
12 import qualified ForSyDe.Backend.VHDL.AST as AST
19 -- | A map from a HsFunction identifier to various stuff we collect about a
20 -- function along the way.
21 type FuncMap = Map.Map HsFunction FuncData
23 -- | Some stuff we collect about a function along the way.
24 data FuncData = FuncData {
25 flatFunc :: Maybe FlatFunction,
26 funcEntity :: Maybe Entity,
27 funcArch :: Maybe AST.ArchBody
30 data VHDLSession = VHDLSession {
31 coreMod :: HscTypes.CoreModule, -- The current module
32 nameCount :: Int, -- A counter that can be used to generate unique names
33 funcs :: FuncMap -- A map from HsFunction to FlatFunction, HWFunction, VHDL Entity and Architecture
36 -- | Add the function to the session
37 addFunc :: HsFunction -> VHDLState ()
39 fs <- State.gets funcs -- Get the funcs element from the session
40 let fs' = Map.insert hsfunc (FuncData Nothing Nothing Nothing) fs -- Insert function
41 State.modify (\x -> x {funcs = fs' })
43 -- | Find the given function in the current session
44 getFunc :: HsFunction -> VHDLState (Maybe FuncData)
46 fs <- State.gets funcs -- Get the funcs element from the session
47 return $ Map.lookup hsfunc fs
49 -- | Gets all functions from the current session
50 getFuncs :: VHDLState [(HsFunction, FuncData)]
52 fs <- State.gets funcs -- Get the funcs element from the session
53 return $ Map.toList fs
55 -- | Sets the FlatFunction for the given HsFunction in the given setting.
56 setFlatFunc :: HsFunction -> FlatFunction -> VHDLState ()
57 setFlatFunc hsfunc flatfunc = do
58 fs <- State.gets funcs -- Get the funcs element from the session
59 let fs'= Map.adjust (\d -> d { flatFunc = Just flatfunc }) hsfunc fs
60 State.modify (\x -> x {funcs = fs' })
62 -- | Modify all functions in the map using the given function
63 modFuncs :: (HsFunction -> FuncData -> FuncData) -> VHDLState ()
65 fs <- State.gets funcs -- Get the funcs element from the session
66 let fs' = Map.mapWithKey f fs
67 State.modify (\x -> x {funcs = fs' })
69 getModule :: VHDLState HscTypes.CoreModule
70 getModule = State.gets coreMod -- Get the coreMod element from the session
72 type VHDLState = State.State VHDLSession
74 -- Makes the given name unique by appending a unique number.
75 -- This does not do any checking against existing names, so it only guarantees
76 -- uniqueness with other names generated by uniqueName.
77 uniqueName :: String -> VHDLState String
79 count <- State.gets nameCount -- Get the funcs element from the session
80 State.modify (\s -> s {nameCount = count + 1})
81 return $ name ++ "_" ++ (show count)
83 -- vim: set ts=8 sw=2 sts=2 expandtab: