{-# LANGUAGE ForeignFunctionInterface, TypeFamilies, MultiParamTypeClasses, 
             FlexibleInstances, TypeSynonymInstances, 
             EmptyDataDecls, ExistentialQuantification, ScopedTypeVariables #-}

-- module HROOT.Class.Interface where

module HROOT.Hist.TFormula.Interface where


import Data.Word
import Foreign.C
import Foreign.Ptr
import Foreign.ForeignPtr
import FFICXX.Runtime.Cast

import HROOT.Hist.TFormula.RawType

import HROOT.Core.TNamed.Interface
---- ============ ----



class (ITNamed a) => ITFormula a where

    compile :: a -> CString -> IO CInt 

    clear :: a -> CString -> IO () 

    definedValue :: a -> CInt -> IO CDouble 

    eval :: a -> CDouble -> CDouble -> CDouble -> CDouble -> IO CDouble 

    evalParOld :: a -> (Ptr CDouble) -> (Ptr CDouble) -> IO CDouble 

    evalPar :: a -> (Ptr CDouble) -> (Ptr CDouble) -> IO CDouble 

    getNdim :: a -> IO CInt 

    getNpar :: a -> IO CInt 

    getNumber :: a -> IO CInt 

    getParNumber :: a -> CString -> IO CInt 

    isLinear :: a -> IO CInt 

    isNormalized :: a -> IO CInt 

    setNumber :: a -> CInt -> IO () 

    setParameter :: a -> CString -> CDouble -> IO () 

    setParameters :: a -> (Ptr CDouble) -> IO () 

    setParName :: a -> CInt -> CString -> IO () 

    setParNames :: a -> CString -> CString -> CString -> CString -> CString -> CString -> CString -> CString -> CString -> CString -> CString -> IO () 

    update :: a -> IO () 

instance Existable TFormula where
  data Exist TFormula = forall a. (FPtr a, ITFormula a) => ETFormula a

upcastTFormula :: (FPtr a, ITFormula a) => a -> TFormula
upcastTFormula h = let fh = get_fptr h
                       fh2 :: ForeignPtr RawTFormula = castForeignPtr fh
                   in cast_fptr_to_obj fh2

downcastTFormula :: (FPtr a, ITFormula a) => TFormula -> a 
downcastTFormula h = let fh = get_fptr h
                         fh2 = castForeignPtr fh
                     in cast_fptr_to_obj fh2