module StmHamt.Hamt
  ( Hamt,
    new,
    newIO,
    null,
    focus,
    focusExplicitly,
    insert,
    insertExplicitly,
    lookup,
    lookupExplicitly,
    reset,
    unfoldlM,
    listT,
    listTNonAtomic,
  )
where

import qualified PrimitiveExtras.By6Bits as By6Bits
import qualified PrimitiveExtras.SmallArray as SmallArray
import qualified StmHamt.Focuses as Focus
import qualified StmHamt.IntOps as IntOps
import qualified StmHamt.ListT as ListT
import StmHamt.Prelude hiding (delete, empty, insert, lookup, null)
import StmHamt.Types
import qualified StmHamt.UnfoldlM as UnfoldlM

new :: STM (Hamt a)
new :: forall a. STM (Hamt a)
new = TVar (By6Bits (Branch a)) -> Hamt a
forall element. TVar (By6Bits (Branch element)) -> Hamt element
Hamt (TVar (By6Bits (Branch a)) -> Hamt a)
-> STM (TVar (By6Bits (Branch a))) -> STM (Hamt a)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> By6Bits (Branch a) -> STM (TVar (By6Bits (Branch a)))
forall a. a -> STM (TVar a)
newTVar By6Bits (Branch a)
forall e. By6Bits e
By6Bits.empty

newIO :: IO (Hamt a)
newIO :: forall a. IO (Hamt a)
newIO = TVar (By6Bits (Branch a)) -> Hamt a
forall element. TVar (By6Bits (Branch element)) -> Hamt element
Hamt (TVar (By6Bits (Branch a)) -> Hamt a)
-> IO (TVar (By6Bits (Branch a))) -> IO (Hamt a)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> By6Bits (Branch a) -> IO (TVar (By6Bits (Branch a)))
forall a. a -> IO (TVar a)
newTVarIO By6Bits (Branch a)
forall e. By6Bits e
By6Bits.empty

focus :: (Hashable key) => Focus element STM result -> (element -> key) -> key -> Hamt element -> STM result
focus :: forall key element result.
Hashable key =>
Focus element STM result
-> (element -> key) -> key -> Hamt element -> STM result
focus Focus element STM result
focus element -> key
elementToKey key
key = Focus element STM result
-> Int -> (element -> Bool) -> Hamt element -> STM result
forall a b. Focus a STM b -> Int -> (a -> Bool) -> Hamt a -> STM b
focusExplicitly Focus element STM result
focus (key -> Int
forall a. Hashable a => a -> Int
hash key
key) (key -> key -> Bool
forall a. Eq a => a -> a -> Bool
(==) key
key (key -> Bool) -> (element -> key) -> element -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
forall {k} (cat :: k -> k -> *) (b :: k) (c :: k) (a :: k).
Category cat =>
cat b c -> cat a b -> cat a c
. element -> key
elementToKey)

focusExplicitly :: Focus a STM b -> Int -> (a -> Bool) -> Hamt a -> STM b
focusExplicitly :: forall a b. Focus a STM b -> Int -> (a -> Bool) -> Hamt a -> STM b
focusExplicitly Focus a STM b
focus Int
hash a -> Bool
test Hamt a
hamt =
  {-# SCC "focus" #-}
  let Focus STM (b, Change (Hamt a))
_ Hamt a -> STM (b, Change (Hamt a))
reveal = Int -> Int -> (a -> Bool) -> Focus a STM b -> Focus (Hamt a) STM b
forall a b.
Int -> Int -> (a -> Bool) -> Focus a STM b -> Focus (Hamt a) STM b
Focus.onHamtElement Int
0 Int
hash a -> Bool
test Focus a STM b
focus
   in ((b, Change (Hamt a)) -> b) -> STM (b, Change (Hamt a)) -> STM b
forall a b. (a -> b) -> STM a -> STM b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap (b, Change (Hamt a)) -> b
forall a b. (a, b) -> a
fst (Hamt a -> STM (b, Change (Hamt a))
reveal Hamt a
hamt)

-- |
-- Returns a flag, specifying, whether the size has been affected.
insert :: (Hashable key) => (element -> key) -> element -> Hamt element -> STM Bool
insert :: forall key element.
Hashable key =>
(element -> key) -> element -> Hamt element -> STM Bool
insert element -> key
elementToKey element
element =
  let !key :: key
key = element -> key
elementToKey element
element
   in Int -> (element -> Bool) -> element -> Hamt element -> STM Bool
forall a. Int -> (a -> Bool) -> a -> Hamt a -> STM Bool
insertExplicitly (key -> Int
forall a. Hashable a => a -> Int
hash key
key) (key -> key -> Bool
forall a. Eq a => a -> a -> Bool
(==) key
key (key -> Bool) -> (element -> key) -> element -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
forall {k} (cat :: k -> k -> *) (b :: k) (c :: k) (a :: k).
Category cat =>
cat b c -> cat a b -> cat a c
. element -> key
elementToKey) element
element

-- |
-- Returns a flag, specifying, whether the size has been affected.
insertExplicitly :: Int -> (a -> Bool) -> a -> Hamt a -> STM Bool
insertExplicitly :: forall a. Int -> (a -> Bool) -> a -> Hamt a -> STM Bool
insertExplicitly Int
hash a -> Bool
testKey a
element =
  {-# SCC "insertExplicitly" #-}
  let loop :: Int -> Hamt a -> STM Bool
loop Int
depth (Hamt TVar (By6Bits (Branch a))
var) =
        let !branchIndex :: Int
branchIndex = Int -> Int -> Int
IntOps.indexAtDepth Int
depth Int
hash
         in do
              By6Bits (Branch a)
branchArray <- TVar (By6Bits (Branch a)) -> STM (By6Bits (Branch a))
forall a. TVar a -> STM a
readTVar TVar (By6Bits (Branch a))
var
              case Int -> By6Bits (Branch a) -> Maybe (Branch a)
forall e. Int -> By6Bits e -> Maybe e
By6Bits.lookup Int
branchIndex By6Bits (Branch a)
branchArray of
                Maybe (Branch a)
Nothing -> do
                  TVar (By6Bits (Branch a)) -> By6Bits (Branch a) -> STM ()
forall a. TVar a -> a -> STM ()
writeTVar TVar (By6Bits (Branch a))
var (By6Bits (Branch a) -> STM ()) -> By6Bits (Branch a) -> STM ()
forall a b. (a -> b) -> a -> b
$! Int -> Branch a -> By6Bits (Branch a) -> By6Bits (Branch a)
forall e. Int -> e -> By6Bits e -> By6Bits e
By6Bits.insert Int
branchIndex (Int -> SmallArray a -> Branch a
forall element. Int -> SmallArray element -> Branch element
LeavesBranch Int
hash (a -> SmallArray a
forall a. a -> SmallArray a
forall (f :: * -> *) a. Applicative f => a -> f a
pure a
element)) By6Bits (Branch a)
branchArray
                  Bool -> STM Bool
forall a. a -> STM a
forall (m :: * -> *) a. Monad m => a -> m a
return Bool
True
                Just Branch a
branch -> case Branch a
branch of
                  LeavesBranch Int
leavesHash SmallArray a
leavesArray ->
                    if Int
leavesHash Int -> Int -> Bool
forall a. Eq a => a -> a -> Bool
== Int
hash
                      then case (a -> Bool) -> SmallArray a -> Maybe (Int, a)
forall a. (a -> Bool) -> SmallArray a -> Maybe (Int, a)
SmallArray.findWithIndex a -> Bool
testKey SmallArray a
leavesArray of
                        Just (Int
leavesIndex, a
_) ->
                          let !newLeavesArray :: SmallArray a
newLeavesArray = Int -> a -> SmallArray a -> SmallArray a
forall a. Int -> a -> SmallArray a -> SmallArray a
SmallArray.set Int
leavesIndex a
element SmallArray a
leavesArray
                              !newBranch :: Branch a
newBranch = Int -> SmallArray a -> Branch a
forall element. Int -> SmallArray element -> Branch element
LeavesBranch Int
hash SmallArray a
newLeavesArray
                              !newBranchArray :: By6Bits (Branch a)
newBranchArray = Int -> Branch a -> By6Bits (Branch a) -> By6Bits (Branch a)
forall e. Int -> e -> By6Bits e -> By6Bits e
By6Bits.replace Int
branchIndex Branch a
newBranch By6Bits (Branch a)
branchArray
                           in do
                                TVar (By6Bits (Branch a)) -> By6Bits (Branch a) -> STM ()
forall a. TVar a -> a -> STM ()
writeTVar TVar (By6Bits (Branch a))
var By6Bits (Branch a)
newBranchArray
                                Bool -> STM Bool
forall a. a -> STM a
forall (m :: * -> *) a. Monad m => a -> m a
return Bool
False
                        Maybe (Int, a)
Nothing ->
                          let newLeavesArray :: SmallArray a
newLeavesArray = a -> SmallArray a -> SmallArray a
forall a. a -> SmallArray a -> SmallArray a
SmallArray.cons a
element SmallArray a
leavesArray
                           in do
                                TVar (By6Bits (Branch a)) -> By6Bits (Branch a) -> STM ()
forall a. TVar a -> a -> STM ()
writeTVar TVar (By6Bits (Branch a))
var (By6Bits (Branch a) -> STM ()) -> By6Bits (Branch a) -> STM ()
forall a b. (a -> b) -> a -> b
$! Int -> Branch a -> By6Bits (Branch a) -> By6Bits (Branch a)
forall e. Int -> e -> By6Bits e -> By6Bits e
By6Bits.replace Int
branchIndex (Int -> SmallArray a -> Branch a
forall element. Int -> SmallArray element -> Branch element
LeavesBranch Int
hash SmallArray a
newLeavesArray) By6Bits (Branch a)
branchArray
                                Bool -> STM Bool
forall a. a -> STM a
forall (m :: * -> *) a. Monad m => a -> m a
return Bool
True
                      else do
                        Hamt a
hamt <- Int -> Int -> Branch a -> Int -> Branch a -> STM (Hamt a)
forall a. Int -> Int -> Branch a -> Int -> Branch a -> STM (Hamt a)
pair (Int -> Int
IntOps.nextDepth Int
depth) Int
hash (Int -> SmallArray a -> Branch a
forall element. Int -> SmallArray element -> Branch element
LeavesBranch Int
hash (a -> SmallArray a
forall a. a -> SmallArray a
forall (f :: * -> *) a. Applicative f => a -> f a
pure a
element)) Int
leavesHash (Int -> SmallArray a -> Branch a
forall element. Int -> SmallArray element -> Branch element
LeavesBranch Int
leavesHash SmallArray a
leavesArray)
                        TVar (By6Bits (Branch a)) -> By6Bits (Branch a) -> STM ()
forall a. TVar a -> a -> STM ()
writeTVar TVar (By6Bits (Branch a))
var (By6Bits (Branch a) -> STM ()) -> By6Bits (Branch a) -> STM ()
forall a b. (a -> b) -> a -> b
$! Int -> Branch a -> By6Bits (Branch a) -> By6Bits (Branch a)
forall e. Int -> e -> By6Bits e -> By6Bits e
By6Bits.replace Int
branchIndex (Hamt a -> Branch a
forall element. Hamt element -> Branch element
BranchesBranch Hamt a
hamt) By6Bits (Branch a)
branchArray
                        Bool -> STM Bool
forall a. a -> STM a
forall (m :: * -> *) a. Monad m => a -> m a
return Bool
True
                  BranchesBranch Hamt a
hamt -> Int -> Hamt a -> STM Bool
loop (Int -> Int
IntOps.nextDepth Int
depth) Hamt a
hamt
   in Int -> Hamt a -> STM Bool
loop Int
0

pair :: Int -> Int -> Branch a -> Int -> Branch a -> STM (Hamt a)
pair :: forall a. Int -> Int -> Branch a -> Int -> Branch a -> STM (Hamt a)
pair Int
depth Int
hash1 Branch a
branch1 Int
hash2 Branch a
branch2 =
  {-# SCC "pair" #-}
  let index1 :: Int
index1 = Int -> Int -> Int
IntOps.indexAtDepth Int
depth Int
hash1
      index2 :: Int
index2 = Int -> Int -> Int
IntOps.indexAtDepth Int
depth Int
hash2
   in if Int
index1 Int -> Int -> Bool
forall a. Eq a => a -> a -> Bool
== Int
index2
        then do
          Hamt a
deeperHamt <- Int -> Int -> Branch a -> Int -> Branch a -> STM (Hamt a)
forall a. Int -> Int -> Branch a -> Int -> Branch a -> STM (Hamt a)
pair (Int -> Int
IntOps.nextDepth Int
depth) Int
hash1 Branch a
branch1 Int
hash2 Branch a
branch2
          TVar (By6Bits (Branch a))
var <- By6Bits (Branch a) -> STM (TVar (By6Bits (Branch a)))
forall a. a -> STM (TVar a)
newTVar (Int -> Branch a -> By6Bits (Branch a)
forall e. Int -> e -> By6Bits e
By6Bits.singleton Int
index1 (Hamt a -> Branch a
forall element. Hamt element -> Branch element
BranchesBranch Hamt a
deeperHamt))
          Hamt a -> STM (Hamt a)
forall a. a -> STM a
forall (m :: * -> *) a. Monad m => a -> m a
return (TVar (By6Bits (Branch a)) -> Hamt a
forall element. TVar (By6Bits (Branch element)) -> Hamt element
Hamt TVar (By6Bits (Branch a))
var)
        else TVar (By6Bits (Branch a)) -> Hamt a
forall element. TVar (By6Bits (Branch element)) -> Hamt element
Hamt (TVar (By6Bits (Branch a)) -> Hamt a)
-> STM (TVar (By6Bits (Branch a))) -> STM (Hamt a)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> By6Bits (Branch a) -> STM (TVar (By6Bits (Branch a)))
forall a. a -> STM (TVar a)
newTVar (Int -> Branch a -> Int -> Branch a -> By6Bits (Branch a)
forall e. Int -> e -> Int -> e -> By6Bits e
By6Bits.pair Int
index1 Branch a
branch1 Int
index2 Branch a
branch2)

-- |
-- Returns a flag, specifying, whether the size has been affected.
lookup :: (Hashable key) => (element -> key) -> key -> Hamt element -> STM (Maybe element)
lookup :: forall key element.
Hashable key =>
(element -> key) -> key -> Hamt element -> STM (Maybe element)
lookup element -> key
elementToKey key
key = Int -> (element -> Bool) -> Hamt element -> STM (Maybe element)
forall a. Int -> (a -> Bool) -> Hamt a -> STM (Maybe a)
lookupExplicitly (key -> Int
forall a. Hashable a => a -> Int
hash key
key) (key -> key -> Bool
forall a. Eq a => a -> a -> Bool
(==) key
key (key -> Bool) -> (element -> key) -> element -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
forall {k} (cat :: k -> k -> *) (b :: k) (c :: k) (a :: k).
Category cat =>
cat b c -> cat a b -> cat a c
. element -> key
elementToKey)

lookupExplicitly :: Int -> (a -> Bool) -> Hamt a -> STM (Maybe a)
lookupExplicitly :: forall a. Int -> (a -> Bool) -> Hamt a -> STM (Maybe a)
lookupExplicitly Int
hash a -> Bool
test =
  {-# SCC "lookupExplicitly" #-}
  let loop :: Int -> Hamt a -> STM (Maybe a)
loop Int
depth (Hamt TVar (By6Bits (Branch a))
var) =
        let !index :: Int
index = Int -> Int -> Int
IntOps.indexAtDepth Int
depth Int
hash
         in do
              By6Bits (Branch a)
branchArray <- TVar (By6Bits (Branch a)) -> STM (By6Bits (Branch a))
forall a. TVar a -> STM a
readTVar TVar (By6Bits (Branch a))
var
              case Int -> By6Bits (Branch a) -> Maybe (Branch a)
forall e. Int -> By6Bits e -> Maybe e
By6Bits.lookup Int
index By6Bits (Branch a)
branchArray of
                Just Branch a
branch -> case Branch a
branch of
                  LeavesBranch Int
leavesHash SmallArray a
leavesArray ->
                    if Int
leavesHash Int -> Int -> Bool
forall a. Eq a => a -> a -> Bool
== Int
hash
                      then Maybe a -> STM (Maybe a)
forall a. a -> STM a
forall (m :: * -> *) a. Monad m => a -> m a
return ((a -> Bool) -> SmallArray a -> Maybe a
forall a. (a -> Bool) -> SmallArray a -> Maybe a
SmallArray.find a -> Bool
test SmallArray a
leavesArray)
                      else Maybe a -> STM (Maybe a)
forall a. a -> STM a
forall (m :: * -> *) a. Monad m => a -> m a
return Maybe a
forall a. Maybe a
Nothing
                  BranchesBranch Hamt a
hamt -> Int -> Hamt a -> STM (Maybe a)
loop (Int -> Int
IntOps.nextDepth Int
depth) Hamt a
hamt
                Maybe (Branch a)
Nothing -> Maybe a -> STM (Maybe a)
forall a. a -> STM a
forall (m :: * -> *) a. Monad m => a -> m a
return Maybe a
forall a. Maybe a
Nothing
   in Int -> Hamt a -> STM (Maybe a)
loop Int
0

reset :: Hamt a -> STM ()
reset :: forall a. Hamt a -> STM ()
reset (Hamt TVar (By6Bits (Branch a))
branchSsaVar) = TVar (By6Bits (Branch a)) -> By6Bits (Branch a) -> STM ()
forall a. TVar a -> a -> STM ()
writeTVar TVar (By6Bits (Branch a))
branchSsaVar By6Bits (Branch a)
forall e. By6Bits e
By6Bits.empty

unfoldlM :: Hamt a -> UnfoldlM STM a
unfoldlM :: forall a. Hamt a -> UnfoldlM STM a
unfoldlM = Hamt a -> UnfoldlM STM a
forall a. Hamt a -> UnfoldlM STM a
UnfoldlM.hamtElements

listT :: Hamt a -> ListT STM a
listT :: forall a. Hamt a -> ListT STM a
listT = Hamt a -> ListT STM a
forall a. Hamt a -> ListT STM a
ListT.hamtElements

listTNonAtomic :: Hamt a -> ListT IO a
listTNonAtomic :: forall a. Hamt a -> ListT IO a
listTNonAtomic = Hamt a -> ListT IO a
forall a. Hamt a -> ListT IO a
ListT.hamtElementsNonAtomic

null :: Hamt a -> STM Bool
null :: forall a. Hamt a -> STM Bool
null (Hamt TVar (By6Bits (Branch a))
branchSsaVar) = do
  By6Bits (Branch a)
branchSsa <- TVar (By6Bits (Branch a)) -> STM (By6Bits (Branch a))
forall a. TVar a -> STM a
readTVar TVar (By6Bits (Branch a))
branchSsaVar
  Bool -> STM Bool
forall a. a -> STM a
forall (m :: * -> *) a. Monad m => a -> m a
return (By6Bits (Branch a) -> Bool
forall a. By6Bits a -> Bool
By6Bits.null By6Bits (Branch a)
branchSsa)