{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE Strict #-}
{-# LANGUAGE KindSignatures #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE PatternSynonyms #-}
{-# LANGUAGE TypeFamilies #-}
{-# OPTIONS_GHC -fno-warn-unused-binds #-}
module Foreign.Erlang.Term
(
Term(..
, Tuple2
, Tuple3
, Tuple4
, Tuple5
, Tuple6
, Tuple7
, List1
, List2
, List3
, List4
, List5
, List6
, List7
, Map1
, Map2
, Map3
, Map4
, Map5
, Map6
, Map7
)
, putTerm
, getTerm
, MapEntry(.., (:=>))
, ToTerm(..)
, toTerms
, FromTerm(..)
, fromTerms
, fromTermA
, integer
, SInteger(..)
, float
, atom
, SAtom(..)
, port
, pid
, Pid(..)
, tuple
, Tuple1(..)
, string
, list
, improperList
, ref
, is_integer
, is_float
, is_atom
, is_reference
, is_port
, is_pid
, is_tuple
, is_map
, is_list
, is_binary
, node
, atom_name
, length
, element
, to_string
, to_integer
, match_atom
, match_tuple
)
where
import GHC.TypeLits
import Prelude hiding ( id
, length
)
import qualified Prelude as P
( id )
import Control.Applicative ( Alternative(..) )
import Control.Category ( (>>>) )
import Control.DeepSeq
import Control.Monad as M
( replicateM )
import Data.String
import Data.ByteString ( ByteString )
import Data.ByteString.Char8 ( unpack )
import qualified Data.ByteString as BS
( head
, length
, tail
, unpack
, foldr'
)
import qualified Data.ByteString.Char8 as CS
( ByteString
, pack
, unpack
)
import Data.Vector ( (!)
, Vector
)
import qualified Data.Vector as V
( length
, replicateM
, tail
)
import qualified Data.List as L
( length
, unfoldr
, length
)
import Data.Binary
import Data.Binary.Put
import Data.Binary.Get hiding ( getBytes )
import Util.Binary
import Test.QuickCheck
import Data.Int
import Data.Bits ( shiftR
, (.&.)
)
import Data.List.NonEmpty (NonEmpty(..))
import Data.Monoid
import GHC.Exts as E
import GHC.Generics
data Term = Integer Integer
| Float Double
| Atom ByteString
| Reference ByteString Word32 Word8
| Port ByteString Word32 Word8
| Pid ByteString Word32 Word32 Word8
| Tuple (Vector Term)
| Map (Vector MapEntry)
| Nil
| String ByteString
| List (Vector Term) Term
| Binary ByteString
| NewReference ByteString Word8 [Word32]
deriving (Eq, Generic)
instance NFData Term
pattern Tuple2 :: Term -> Term -> Term
pattern Tuple2 t1 t2 <- Tuple (toList -> [t1,t2]) where
Tuple2 t1 t2 = Tuple (fromList [t1,t2])
pattern Tuple3 :: Term -> Term -> Term -> Term
pattern Tuple3 t1 t2 t3 <- Tuple (toList -> [t1,t2,t3]) where
Tuple3 t1 t2 t3 = Tuple (fromList [t1,t2,t3])
pattern Tuple4 :: Term -> Term -> Term -> Term -> Term
pattern Tuple4 t1 t2 t3 t4 <- Tuple (toList -> [t1,t2,t3,t4]) where
Tuple4 t1 t2 t3 t4 = Tuple (fromList [t1,t2,t3,t4])
pattern Tuple5 :: Term -> Term -> Term -> Term -> Term -> Term
pattern Tuple5 t1 t2 t3 t4 t5 <- Tuple (toList -> [t1,t2,t3,t4,t5]) where
Tuple5 t1 t2 t3 t4 t5 = Tuple (fromList [t1,t2,t3,t4,t5])
pattern Tuple6 :: Term
-> Term -> Term -> Term -> Term -> Term -> Term
pattern Tuple6 t1 t2 t3 t4 t5 t6 <- Tuple (toList -> [t1,t2,t3,t4,t5,t6]) where
Tuple6 t1 t2 t3 t4 t5 t6 = Tuple (fromList [t1,t2,t3,t4,t5,t6])
pattern Tuple7 :: Term
-> Term -> Term -> Term -> Term -> Term -> Term -> Term
pattern Tuple7 t1 t2 t3 t4 t5 t6 t7 <- Tuple (toList -> [t1,t2,t3,t4,t5,t6,t7]) where
Tuple7 t1 t2 t3 t4 t5 t6 t7 = Tuple (fromList [t1,t2,t3,t4,t5,t6,t7])
pattern List1 :: Term -> Term
pattern List1 t1 <- List (toList -> [t1]) Nil where
List1 t1 = List (fromList [t1]) Nil
pattern List2 :: Term -> Term -> Term
pattern List2 t1 t2 <- List (toList -> [t1,t2]) Nil where
List2 t1 t2 = List (fromList [t1,t2]) Nil
pattern List3 :: Term -> Term -> Term -> Term
pattern List3 t1 t2 t3 <- List (toList -> [t1,t2,t3]) Nil where
List3 t1 t2 t3 = List (fromList [t1,t2,t3]) Nil
pattern List4 :: Term -> Term -> Term -> Term -> Term
pattern List4 t1 t2 t3 t4 <- List (toList -> [t1,t2,t3,t4]) Nil where
List4 t1 t2 t3 t4 = List (fromList [t1,t2,t3,t4]) Nil
pattern List5 :: Term -> Term -> Term -> Term -> Term -> Term
pattern List5 t1 t2 t3 t4 t5 <- List (toList -> [t1,t2,t3,t4,t5]) Nil where
List5 t1 t2 t3 t4 t5 = List (fromList [t1,t2,t3,t4,t5]) Nil
pattern List6 :: Term
-> Term -> Term -> Term -> Term -> Term -> Term
pattern List6 t1 t2 t3 t4 t5 t6 <- List (toList -> [t1,t2,t3,t4,t5,t6]) Nil where
List6 t1 t2 t3 t4 t5 t6 = List (fromList [t1,t2,t3,t4,t5,t6]) Nil
pattern List7 :: Term
-> Term -> Term -> Term -> Term -> Term -> Term -> Term
pattern List7 t1 t2 t3 t4 t5 t6 t7 <- List (toList -> [t1,t2,t3,t4,t5,t6,t7]) Nil where
List7 t1 t2 t3 t4 t5 t6 t7 = List (fromList [t1,t2,t3,t4,t5,t6,t7]) Nil
pattern (:=>) :: Term -> Term -> MapEntry
pattern k :=> v = MapEntry k v
pattern Map1 :: MapEntry -> Term
pattern Map1 t1 <- Map (toList -> [t1]) where
Map1 t1 = Map (fromList [t1])
pattern Map2 :: MapEntry -> MapEntry -> Term
pattern Map2 t1 t2 <- Map (toList -> [t1,t2]) where
Map2 t1 t2 = Map (fromList [t1,t2])
pattern Map3 :: MapEntry -> MapEntry -> MapEntry -> Term
pattern Map3 t1 t2 t3 <- Map (toList -> [t1,t2,t3]) where
Map3 t1 t2 t3 = Map (fromList [t1,t2,t3])
pattern Map4 :: MapEntry
-> MapEntry -> MapEntry -> MapEntry -> Term
pattern Map4 t1 t2 t3 t4 <- Map (toList -> [t1,t2,t3,t4]) where
Map4 t1 t2 t3 t4 = Map (fromList [t1,t2,t3,t4])
pattern Map5 :: MapEntry
-> MapEntry -> MapEntry -> MapEntry -> MapEntry -> Term
pattern Map5 t1 t2 t3 t4 t5 <- Map (toList -> [t1,t2,t3,t4,t5]) where
Map5 t1 t2 t3 t4 t5 = Map (fromList [t1,t2,t3,t4,t5])
pattern Map6 :: MapEntry
-> MapEntry -> MapEntry -> MapEntry -> MapEntry -> MapEntry -> Term
pattern Map6 t1 t2 t3 t4 t5 t6 <- Map (toList -> [t1,t2,t3,t4,t5,t6]) where
Map6 t1 t2 t3 t4 t5 t6 = Map (fromList [t1,t2,t3,t4,t5,t6])
pattern Map7 :: MapEntry
-> MapEntry
-> MapEntry
-> MapEntry
-> MapEntry
-> MapEntry
-> MapEntry
-> Term
pattern Map7 t1 t2 t3 t4 t5 t6 t7 <- Map (toList -> [t1,t2,t3,t4,t5,t6,t7]) where
Map7 t1 t2 t3 t4 t5 t6 t7 = Map (fromList [t1,t2,t3,t4,t5,t6,t7])
data MapEntry = MapEntry { key :: Term
, value :: Term
}
deriving (Eq, Generic)
instance NFData MapEntry
instance Ord Term where
(Integer i) `compare` (Integer i') =
i `compare` i'
(Integer i) `compare` (Float d') =
(fromIntegral i) `compare` d'
(Integer _) `compare` _ =
LT
(Float d) `compare` (Float d') =
d `compare` d'
(Float d) `compare` (Integer i') =
d `compare` (fromIntegral i')
(Float _) `compare` _ = LT
(Atom a) `compare` (Atom a') =
a `compare` a'
(Atom _) `compare` _ = LT
(Reference node' id creation) `compare` (Reference node'' id' creation') =
(node', id, creation) `compare` (node'', id', creation')
(Reference _ _ _) `compare` _ =
LT
(NewReference node' creation ids) `compare` (NewReference node'' creation' ids') =
(node', creation, ids) `compare` (node'', creation', ids')
(NewReference _ _ _) `compare` _ =
LT
(Port node' id creation) `compare` (Port node'' id' creation') =
(node', id, creation) `compare` (node'', id', creation')
(Port _ _ _) `compare` _ =
LT
(Pid node' id serial creation) `compare` (Pid node'' id' serial' creation') =
(node', id, serial, creation) `compare` (node'', id', serial', creation')
(Pid _ _ _ _) `compare` _ =
LT
(Tuple v) `compare` (Tuple v') =
v `compare` v'
(Tuple _) `compare` _ = LT
(Map e) `compare` (Map e') =
e `compare` e'
(Map _) `compare` _ = LT
Nil `compare` Nil = EQ
Nil `compare` _ = LT
(String s) `compare` (String s') =
s `compare` s'
(String s) `compare` (List v' t') =
(toVector s, Nil) `compare` (v', t')
(String _) `compare` _ =
LT
(List v t) `compare` (List v' t') =
(v, t) `compare` (v', t')
(List v t) `compare` (String s') =
(v, t) `compare` (toVector s', Nil)
(List _ _) `compare` _ =
LT
(Binary b) `compare` (Binary b') =
b `compare` b'
(Binary _) `compare` _ =
LT
toVector :: ByteString -> Vector Term
toVector = BS.unpack >>> map (fromIntegral >>> Integer) >>> fromList
instance Ord MapEntry where
MapEntry{key = k,value = v} `compare` MapEntry{key = k',value = v'} =
(k, v) `compare` (k', v')
instance Show Term where
showsPrec _ (Integer i) = shows i
showsPrec _ (Float d) = shows d
showsPrec _ (Atom a) = showChar '\'' . showString (unpack a) . showChar '\''
showsPrec _ (Reference nodeName id _creation) =
showString "#Ref<" . showString (unpack nodeName) . showChar '.' . shows id . showChar '>'
showsPrec _ (Port nodeName id _creation) =
showString "#Port<" . showString (unpack nodeName) . showChar '.' . shows id . showChar '>'
showsPrec _ (Pid nodeName id serial _creation) =
showString "#Pid<" . showString (unpack nodeName) . showChar '.' . shows id . showChar '.' . shows serial . showChar '>'
showsPrec _ (Tuple v) = showChar '{' . showsVectorAsList v . showChar '}'
showsPrec _ (Map e) = showString "#{" . showsVectorAsList e . showChar '}'
showsPrec _ Nil = showString "[]"
showsPrec _ (String s) = shows s
showsPrec _ (List v Nil) = showChar '[' . showsVectorAsList v . showChar ']'
showsPrec _ (List v t) = showChar '[' . showsVectorAsList v . showChar '|' . shows t . showChar ']'
showsPrec _ (Binary b) = showString "<<" . showsByteStringAsIntList b . showString ">>"
showsPrec _ (NewReference nodeName _creation ids) =
showString "#Ref<" . showString (unpack nodeName) . appEndo (foldMap (\i -> Endo (showChar '.' . shows i)) ids) . showChar '>'
instance Show MapEntry where
showsPrec _ MapEntry{key,value} =
shows key . showString " => " . shows value
showsVectorAsList :: Show a => (Vector a) -> ShowS
showsVectorAsList v
| V.length v == 0 = \s -> s
| V.length v == 1 = shows (v ! 0)
| otherwise = shows (v ! 0)
. appEndo (foldMap (\t -> Endo (showChar ',' . shows t)) (V.tail v))
showsByteStringAsIntList :: ByteString -> ShowS
showsByteStringAsIntList b
| BS.length b == 0
= \s -> s
| BS.length b == 1
= shows (BS.head b)
| otherwise
= shows (BS.head b)
. appEndo
(foldMap (\t -> Endo (showChar ',' . shows t))
(BS.unpack (BS.tail b))
)
instance IsString Term where
fromString = atom . CS.pack
instance E.IsList Term where
type Item Term = Term
fromList xs = List (fromList xs) Nil
toList (List xs Nil) = toList xs
toList _ = []
instance FromTerm Term where
fromTerm = Just
instance ToTerm Term where
toTerm = P.id
instance Num Term where
(Integer x) + (Integer y) = Integer (x+y)
(Float x) + (Float y) = Float (x+y)
_ + _ = error "non numeric arguments to (+)"
(Integer x) * (Integer y) = Integer (x*y)
(Float x) * (Float y) = Float (x*y)
_ * _ = error "non numeric arguments to (*)"
abs (Integer x) = Integer (abs x)
abs (Float x) = Float (abs x)
abs _ = error "non numeric arguments to 'abs'"
signum (Integer x) = Integer (signum x)
signum (Float x) = Float (signum x)
signum _ = error "non numeric arguments to 'signum'"
negate (Integer x) = Integer (negate x)
negate (Float x) = Float (negate x)
negate _ = error "non numeric arguments to 'negate'"
fromInteger = integer
class ToTerm a where
toTerm :: a -> Term
class FromTerm a where
fromTerm :: Term -> Maybe a
fromTermA :: (FromTerm a, Alternative m) => Term -> m a
fromTermA t = case fromTerm t of
Just x -> pure x
Nothing -> empty
instance FromTerm () where
fromTerm (Tuple ts) | V.length ts == 0 = Just ()
fromTerm _ = Nothing
instance FromTerm Double where
fromTerm (Float f) = Just f
fromTerm _ = Nothing
instance FromTerm Bool where
fromTerm "true" = Just True
fromTerm "false" = Just False
fromTerm _ = Nothing
instance FromTerm Integer where
fromTerm (Integer i) = Just i
fromTerm _ = Nothing
instance FromTerm String where
fromTerm (String s) = Just (CS.unpack s)
fromTerm _ = Nothing
instance (FromTerm a) => FromTerm (Tuple1 a) where
fromTerm (Tuple ts) | V.length ts == 1 = Tuple1 <$> fromTerm (ts ! 0)
fromTerm _ = Nothing
instance (FromTerm a, FromTerm b) => FromTerm (a, b) where
fromTerm (Tuple ts) | V.length ts == 2 = (,) <$> fromTerm (ts ! 0) <*> fromTerm (ts ! 1)
fromTerm _ = Nothing
instance (FromTerm a, FromTerm b, FromTerm c) => FromTerm (a, b, c) where
fromTerm (Tuple ts) | V.length ts == 3 = (,,) <$> fromTerm (ts ! 0) <*> fromTerm (ts ! 1) <*> fromTerm (ts ! 2)
fromTerm _ = Nothing
instance (FromTerm a, FromTerm b, FromTerm c, FromTerm d) => FromTerm (a, b, c, d) where
fromTerm (Tuple ts) | V.length ts == 4 = (,,,) <$> fromTerm (ts ! 0)
<*> fromTerm (ts ! 1)
<*> fromTerm (ts ! 2)
<*> fromTerm (ts ! 3)
fromTerm _ = Nothing
instance (FromTerm a, FromTerm b, FromTerm c, FromTerm d, FromTerm e) => FromTerm (a, b, c, d, e) where
fromTerm (Tuple ts) | V.length ts == 5 = (,,,,) <$> fromTerm (ts ! 0)
<*> fromTerm (ts ! 1)
<*> fromTerm (ts ! 2)
<*> fromTerm (ts ! 3)
<*> fromTerm (ts ! 4)
fromTerm _ = Nothing
instance FromTerm a => FromTerm (NonEmpty a) where
fromTerm (List (toList -> xs) Nil) =
case sequence (fromTerm <$> xs) of
Just (h:t) -> Just (h :| t)
_ -> Nothing
fromTerm _ = Nothing
instance FromTerm a => FromTerm (Maybe a) where
fromTerm (Tuple2 "ok" x) = Just <$> fromTerm x
fromTerm "error" = Just Nothing
fromTerm _ = Nothing
instance (FromTerm a, FromTerm b) => FromTerm (Either a b) where
fromTerm (Tuple2 "ok" x) = Right <$> fromTerm x
fromTerm (Tuple2 "error" x) = Left <$> fromTerm x
fromTerm _ = Nothing
fromTerms :: FromTerm a => Term -> Maybe [a]
fromTerms (List (toList -> xs) Nil) = sequence (fromTerm <$> xs)
fromTerms _ = Nothing
instance ToTerm () where
toTerm () = tuple []
instance ToTerm Integer where
toTerm = Integer
instance ToTerm String where
toTerm = String . CS.pack
instance ToTerm Bool where
toTerm True = "true"
toTerm False = "false"
instance ToTerm Double where
toTerm = Float
instance (ToTerm a) => ToTerm (Tuple1 a) where
toTerm (Tuple1 a) = tuple [ toTerm a ]
instance (ToTerm a, ToTerm b) => ToTerm (a, b) where
toTerm (a, b) = tuple [ toTerm a, toTerm b ]
instance (ToTerm a, ToTerm b, ToTerm c) => ToTerm (a, b, c) where
toTerm (a, b, c) = tuple [ toTerm a, toTerm b, toTerm c ]
instance (ToTerm a, ToTerm b, ToTerm c, ToTerm d) => ToTerm (a, b, c, d) where
toTerm (a, b, c, d) = tuple [ toTerm a, toTerm b, toTerm c, toTerm d ]
instance (ToTerm a, ToTerm b, ToTerm c, ToTerm d, ToTerm e) => ToTerm (a, b, c, d, e) where
toTerm (a, b, c, d, e) =
tuple [ toTerm a, toTerm b, toTerm c, toTerm d, toTerm e ]
instance ToTerm a => ToTerm (NonEmpty a) where
toTerm = toTerms . toList
instance ToTerm a => ToTerm (Maybe a) where
toTerm (Just x) = Tuple2 "ok" (toTerm x)
toTerm Nothing = "error"
instance (ToTerm a, ToTerm b) => ToTerm (Either a b) where
toTerm (Left x) = Tuple2 "error" (toTerm x)
toTerm (Right x) = Tuple2 "ok" (toTerm x)
toTerms :: ToTerm a => [a] -> Term
toTerms xs = List (fromList (toTerm <$> xs)) Nil
integer
:: Integer
-> Term
integer = Integer
data SInteger (n :: Nat) = SInteger
instance (KnownNat n) => Show (SInteger n) where
showsPrec d s =
showParen (d > 10) (showString "SInteger '" . showsPrec 11 (natVal s) . showChar '\'')
instance forall (n :: Nat) . (KnownNat n) => FromTerm (SInteger n) where
fromTerm (Integer n') = let sn = SInteger
sn :: SInteger n
in
if n' == natVal sn then Just sn else Nothing
fromTerm _ = Nothing
instance forall (n :: Nat) . (KnownNat n) => ToTerm (SInteger n) where
toTerm = integer . natVal
float
:: Double
-> Term
float = Float
atom
:: ByteString
-> Term
atom = Atom
data SAtom (atom :: Symbol) = SAtom
instance (KnownSymbol atom) => Show (SAtom atom) where
showsPrec d s =
showParen (d > 10) (showString "SAtom '" . showString (symbolVal s) . showChar '\'')
instance forall (atom :: Symbol) . (KnownSymbol atom) => FromTerm (SAtom atom) where
fromTerm (Atom atom') = if atom' == CS.pack (symbolVal (SAtom :: SAtom atom)) then Just SAtom else Nothing
fromTerm _ = Nothing
instance forall (atom :: Symbol) . (KnownSymbol atom) => ToTerm (SAtom atom) where
toTerm = atom . CS.pack . symbolVal
port
:: ByteString
-> Word32
-> Word8
-> Term
port = Port
pid
:: ByteString
-> Word32
-> Word32
-> Word8
-> Pid
pid = ((.) . (.) . (.) . (.)) MkPid Pid
newtype Pid = MkPid Term
deriving (ToTerm, FromTerm, Eq, Ord)
instance Show Pid where
show (MkPid p) = show p
tuple
:: [Term]
-> Term
tuple = Tuple . fromList
newtype Tuple1 a = Tuple1 a
deriving (Eq, Ord)
instance (Show a) => Show (Tuple1 a) where
show (Tuple1 a) = "{" ++ show a ++ "}"
string
:: ByteString
-> Term
string = String
list
:: [Term]
-> Term
list [] = Nil
list ts = improperList ts Nil
improperList
:: [Term]
-> Term
-> Term
improperList [] _ = error "Illegal improper list"
improperList ts t = List (fromList ts) t
ref
:: ByteString
-> Word8
-> [Word32]
-> Term
ref = NewReference
is_integer, is_float, is_atom, is_reference, is_port, is_pid, is_tuple, is_map, is_list, is_binary
:: Term -> Bool
is_integer (Integer _) = True
is_integer _ = False
is_float (Float _) = True
is_float _ = False
is_atom (Atom _) = True
is_atom _ = False
is_reference (Reference _ _ _) = True
is_reference (NewReference _ _ _) = True
is_reference _ = False
is_port (Port _ _ _) = True
is_port _ = False
is_pid (Pid _ _ _ _) = True
is_pid _ = False
is_tuple (Tuple _) = True
is_tuple _ = False
is_map (Map _) = True
is_map _ = False
is_list Nil = True
is_list (String _) = True
is_list (List _ _) = True
is_list _ = False
is_binary (Binary _) = True
is_binary _ = False
node :: Term -> Term
node (Reference nodeName _id _creation) = atom nodeName
node (Port nodeName _id _creation) = atom nodeName
node (Pid nodeName _id _serial _creation) = atom nodeName
node (NewReference nodeName _creation _ids) = atom nodeName
node term = error $ "Bad arg for node: " ++ show term
atom_name :: Term -> ByteString
atom_name (Atom name) = name
atom_name term = error $ "Bad arg for atom_name: " ++ show term
length :: Term -> Int
length (Tuple v ) = V.length v
length (String bs ) = BS.length bs
length (List v Nil) = V.length v
length term = error $ "Bad arg for length: " ++ show term
element :: Int -> Term -> Term
element n (Tuple v) = v ! (n - 1)
element _ term = error $ "Not a tuple: " ++ show term
to_string :: Term -> Maybe ByteString
to_string (String bs) = Just bs
to_string _ = Nothing
to_integer :: Term -> Maybe Integer
to_integer (Integer i) = Just i
to_integer _ = Nothing
match_tuple :: Term -> Maybe [Term]
match_tuple (Tuple v) = Just (toList v)
match_tuple _ = Nothing
match_atom :: Term -> ByteString -> Maybe ByteString
match_atom (Atom n) m | m == n = Just n
| otherwise = Nothing
match_atom _ _ = Nothing
instance Binary Term where
put (Integer i)
| i >= 0x00 && i <= 0xFF = do
putWord8 small_integer_ext
putWord8 (fromIntegral i)
| i >= -0x80000000 && i <= 0x7FFFFFFF = do
putWord8 integer_ext
putWord32be (fromIntegral i)
| otherwise =
do let digits = L.unfoldr takeLSB (abs i)
where takeLSB x
| x == 0 = Nothing
| otherwise = Just (fromIntegral (x Data.Bits..&. 0xff), x `shiftR` 8)
if L.length digits < 256
then do putWord8 small_big_ext
putWord8 (fromIntegral (L.length digits))
else do putWord8 large_big_ext
putWord32be (fromIntegral (L.length digits))
putWord8 (if i >= 0 then 0 else 1)
mapM_ putWord8 digits
put (Float d) = do
putWord8 new_float_ext
putDoublebe d
put (Atom n) = putAtom n
put (Reference nodeName id creation) = do
putWord8 reference_ext
putAtom nodeName
putWord32be id
putWord8 creation
put (Port nodeName id creation) = do
putWord8 port_ext
putAtom nodeName
putWord32be id
putWord8 creation
put (Pid nodeName id serial creation) = do
putWord8 pid_ext
putAtom nodeName
putWord32be id
putWord32be serial
putWord8 creation
put (Tuple v)
| (V.length v) < 256 = do
putWord8 small_tuple_ext
putWord8 $ fromIntegral (V.length v)
mapM_ put v
| otherwise = do
putWord8 large_tuple_ext
putWord32be $ fromIntegral (V.length v)
mapM_ put v
put (Map e) = do
putWord8 map_ext
putWord32be $ fromIntegral (V.length e)
mapM_ put e
put Nil = putWord8 nil_ext
put (String s) = do
putWord8 string_ext
putLength16beByteString s
put (List v t) = do
putWord8 list_ext
putWord32be $ fromIntegral (V.length v)
mapM_ put v
put t
put (Binary b) = do
putWord8 binary_ext
putLength32beByteString b
put (NewReference node' creation ids) = do
putWord8 new_reference_ext
putWord16be $ fromIntegral (L.length ids)
putAtom node'
putWord8 creation
mapM_ putWord32be ids
get = lookAhead getWord8 >>= get'
where
get' :: Word8 -> Get Term
get' tag
| tag == small_integer_ext =
getSmallInteger (Integer . fromIntegral)
| tag == integer_ext = getInteger (Integer . toInteger . (fromIntegral :: Word32 -> Int32))
| tag == small_big_ext = getWord8 *> getWord8 >>= getBigInteger . fromIntegral
| tag == large_big_ext = getWord8 *> getWord32be >>= getBigInteger . fromIntegral
| tag == atom_ext = getAtom Atom
| tag == port_ext = getPort Port
| tag == pid_ext = getPid Pid
| tag == small_tuple_ext =
getSmallTuple Tuple
| tag == large_tuple_ext =
getLargeTuple Tuple
| tag == map_ext = getMap Map
| tag == nil_ext = getNil (const Nil)
| tag == string_ext = getString String
| tag == list_ext = getList List
| tag == binary_ext = getBinary Binary
| tag == new_reference_ext =
getNewReference NewReference
| tag == small_atom_ext = getSmallAtom Atom
| tag == new_float_ext = getNewFloat Float
| otherwise = fail $ "Unsupported tag: " ++ show tag
instance Binary MapEntry where
put MapEntry{key,value} = do
put key
put value
get = do
MapEntry <$> get <*> get
putTerm :: (ToTerm t) => t -> Put
putTerm t = do
putWord8 magicVersion
put (toTerm t)
putAtom :: ByteString -> Put
putAtom a = do
putWord8 atom_ext
putLength16beByteString a
getTerm :: Get Term
getTerm = do
matchWord8 magicVersion
get
getSmallInteger :: (Word8 -> a) -> Get a
getSmallInteger f = do
matchWord8 small_integer_ext
f <$> getWord8
getInteger :: (Word32 -> a) -> Get a
getInteger f = do
matchWord8 integer_ext
f <$> getWord32be
getBigInteger :: Int -> Get Term
getBigInteger len = mkBigInteger <$> getWord8 <*> getByteString len
where
mkBigInteger signByte bs = Integer
((if signByte == 0 then 1 else (-1)) * absInt)
where absInt = BS.foldr' (\b acc -> 256 * acc + fromIntegral b) 0 bs
getAtom :: (ByteString -> a) -> Get a
getAtom f = do
matchWord8 atom_ext
f <$> getLength16beByteString
getPort :: (ByteString -> Word32 -> Word8 -> a) -> Get a
getPort f = do
matchWord8 port_ext
f <$> getAtom P.id <*> getWord32be <*> getWord8
getPid :: (ByteString -> Word32 -> Word32 -> Word8 -> a) -> Get a
getPid f = do
matchWord8 pid_ext
f <$> getAtom P.id <*> getWord32be <*> getWord32be <*> getWord8
getSmallTuple :: (Vector Term -> a) -> Get a
getSmallTuple f = do
matchWord8 small_tuple_ext
f <$> (getWord8 >>= _getVector . fromIntegral)
getLargeTuple :: (Vector Term -> a) -> Get a
getLargeTuple f = do
matchWord8 large_tuple_ext
f <$> (getWord32be >>= _getVector . fromIntegral)
getMap :: (Vector MapEntry -> a) -> Get a
getMap f = do
matchWord8 map_ext
f <$> (getWord32be >>= _getVector . fromIntegral)
getNil :: (() -> a) -> Get a
getNil f =
f <$> matchWord8 nil_ext
getString :: (ByteString -> a) -> Get a
getString f = do
matchWord8 string_ext
f <$> getLength16beByteString
getList :: (Vector Term -> Term -> a) -> Get a
getList f = do
matchWord8 list_ext
f <$> (getWord32be >>= _getVector . fromIntegral) <*> get
getBinary :: (ByteString -> a) -> Get a
getBinary f = do
matchWord8 binary_ext
f <$> getLength32beByteString
getNewReference :: (ByteString -> Word8 -> [Word32] -> a) -> Get a
getNewReference f = do
matchWord8 new_reference_ext
len <- getWord16be
f <$> getAtom P.id <*> getWord8 <*> _getList (fromIntegral len)
getSmallAtom :: (ByteString -> a) -> Get a
getSmallAtom f = do
matchWord8 small_atom_ext
f <$> getLength8ByteString
getNewFloat :: (Double -> a) -> Get a
getNewFloat f = do
matchWord8 new_float_ext
f <$> getDoublebe
_getVector :: Binary a => Int -> Get (Vector a)
_getVector len = V.replicateM len get
_getList :: Binary a => Int -> Get [a]
_getList len = M.replicateM len get
magicVersion :: Word8
magicVersion = 131
small_integer_ext, integer_ext, float_ext, atom_ext, reference_ext, port_ext, pid_ext
:: Word8
small_tuple_ext, large_tuple_ext, map_ext, nil_ext, string_ext, list_ext, binary_ext
:: Word8
small_big_ext, large_big_ext, new_reference_ext, small_atom_ext, fun_ext, new_fun_ext
:: Word8
export_ext, bit_binary_ext, new_float_ext, atom_utf8_ext, small_atom_utf8_ext
:: Word8
small_integer_ext = 97
integer_ext = 98
float_ext = 99
atom_ext = 100
reference_ext = 101
port_ext = 102
pid_ext = 103
small_tuple_ext = 104
large_tuple_ext = 105
map_ext = 116
nil_ext = 106
string_ext = 107
list_ext = 108
binary_ext = 109
small_big_ext = 110
large_big_ext = 111
new_reference_ext = 114
small_atom_ext = 115
fun_ext = 117
new_fun_ext = 112
export_ext = 113
bit_binary_ext = 77
new_float_ext = 70
atom_utf8_ext = 118
small_atom_utf8_ext = 119
instance Arbitrary Term where
arbitrary = oneof [ atom <$> scale (`div` 2) arbitraryUnquotedAtom
, tuple <$> scale (`div` 2) arbitrary
, string <$> scale (`div` 2) arbitraryUnquotedAtom
, sized $
\qcs -> if qcs > 1
then improperList <$> (getNonEmpty <$> scale (`div` 2) arbitrary)
<*> scale (`div` 2) arbitrary
else list <$> scale (`div` 2) arbitrary
, ref <$> scale smaller arbitraryUnquotedAtom
<*> scale smaller arbitrary
<*> scale smaller arbitrary
, (toTerm :: Pid -> Term) <$> scale smaller arbitrary
, float <$> scale smaller arbitrary
, (toTerm :: Integer -> Term) <$> scale smaller arbitrary
]
smaller :: (Eq a, Num a) => a -> a
smaller 0 = 0
smaller n = n - 1
arbitraryUnquotedAtom :: Gen CS.ByteString
arbitraryUnquotedAtom =
CS.pack <$> (listOf1 (elements (['a' .. 'z'] ++ ['_'] ++ ['0' .. '9'])))
instance Arbitrary Pid where
arbitrary = pid <$> scale smaller arbitraryUnquotedAtom
<*> scale smaller arbitrary
<*> scale smaller arbitrary
<*> scale smaller arbitrary