{-# LANGUAGE ForeignFunctionInterface #-}
{-# LANGUAGE TemplateHaskell #-}
module Data.Array.Mixed.Internal.Arith.Foreign where

import Control.Monad
import Data.Int
import Data.Maybe
import Foreign.C.Types
import Foreign.Ptr
import Language.Haskell.TH

import Data.Array.Mixed.Internal.Arith.Lists


$(fmap concat . forM typesList $ \arithtype -> do
    let ttyp = conT (atType arithtype)
    let base = "binary_" ++ atCName arithtype
    sequence $ catMaybes
      [Just (ForeignD . ImportF CCall Unsafe ("oxarop_" ++ base ++ "_sv") (mkName ("c_" ++ base ++ "_sv")) <$>
               [t| CInt -> Int64 -> Ptr $ttyp -> $ttyp -> Ptr $ttyp -> IO () |])
      ,Just (ForeignD . ImportF CCall Unsafe ("oxarop_" ++ base ++ "_vv") (mkName ("c_" ++ base ++ "_vv")) <$>
               [t| CInt -> Int64 -> Ptr $ttyp -> Ptr $ttyp -> Ptr $ttyp -> IO () |])
      ,Just (ForeignD . ImportF CCall Unsafe ("oxarop_" ++ base ++ "_vs") (mkName ("c_" ++ base ++ "_vs")) <$>
               [t| CInt -> Int64 -> Ptr $ttyp -> Ptr $ttyp -> $ttyp -> IO () |])
      ])

$(fmap concat . forM floatTypesList $ \arithtype -> do
    let ttyp = conT (atType arithtype)
    let base = "fbinary_" ++ atCName arithtype
    sequence $ catMaybes
      [Just (ForeignD . ImportF CCall Unsafe ("oxarop_" ++ base ++ "_sv") (mkName ("c_" ++ base ++ "_sv")) <$>
               [t| CInt -> Int64 -> Ptr $ttyp -> $ttyp -> Ptr $ttyp -> IO () |])
      ,Just (ForeignD . ImportF CCall Unsafe ("oxarop_" ++ base ++ "_vv") (mkName ("c_" ++ base ++ "_vv")) <$>
               [t| CInt -> Int64 -> Ptr $ttyp -> Ptr $ttyp -> Ptr $ttyp -> IO () |])
      ,Just (ForeignD . ImportF CCall Unsafe ("oxarop_" ++ base ++ "_vs") (mkName ("c_" ++ base ++ "_vs")) <$>
               [t| CInt -> Int64 -> Ptr $ttyp -> Ptr $ttyp -> $ttyp -> IO () |])
      ])

$(fmap concat . forM typesList $ \arithtype -> do
    let ttyp = conT (atType arithtype)
    let base = "unary_" ++ atCName arithtype
    pure . ForeignD . ImportF CCall Unsafe ("oxarop_" ++ base) (mkName ("c_" ++ base)) <$>
      [t| CInt -> Int64 -> Ptr $ttyp -> Ptr $ttyp -> IO () |])

$(fmap concat . forM floatTypesList $ \arithtype -> do
    let ttyp = conT (atType arithtype)
    let base = "funary_" ++ atCName arithtype
    pure . ForeignD . ImportF CCall Unsafe ("oxarop_" ++ base) (mkName ("c_" ++ base)) <$>
      [t| CInt -> Int64 -> Ptr $ttyp -> Ptr $ttyp -> IO () |])

$(fmap concat . forM typesList $ \arithtype -> do
    let ttyp = conT (atType arithtype)
    let base = "reduce_" ++ atCName arithtype
    pure . ForeignD . ImportF CCall Unsafe ("oxarop_" ++ base) (mkName ("c_" ++ base)) <$>
      [t| CInt -> Int64 -> Ptr Int64 -> Ptr Int64 -> Ptr $ttyp -> Ptr $ttyp -> IO () |])

$(fmap concat . forM typesList $ \arithtype ->
    fmap concat . forM ["min", "max"] $ \fname -> do
      let ttyp = conT (atType arithtype)
      let base = "extremum_" ++ fname ++ "_" ++ atCName arithtype
      pure . ForeignD . ImportF CCall Unsafe ("oxarop_" ++ base) (mkName ("c_" ++ base)) <$>
        [t| Ptr Int64 -> Int64 -> Ptr Int64 -> Ptr Int64 -> Ptr $ttyp -> IO () |])