mirror of https://github.com/voidlizard/hbs2
39 lines
926 B
Haskell
39 lines
926 B
Haskell
{-# Language FunctionalDependencies #-}
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module HBS2.Storage where
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import Data.Kind
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import Data.Hashable hiding (Hashed)
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import HBS2.Hash
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type family Block block :: Type
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type family Key block :: Type
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newtype Offset = Offset Integer
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deriving newtype (Eq,Ord,Enum,Num,Real,Integral,Hashable)
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deriving stock (Show)
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newtype Size = Size Integer
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deriving newtype (Eq,Ord,Enum,Num,Real,Integral,Hashable)
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deriving stock (Show)
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class ( Monad m
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, Hashed (StorageHash a block) block
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) => Storage a block m | a -> block where
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type family StorageHash a block :: Type
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putBlock :: a -> Block block -> m (Maybe (Key block))
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getBlock :: a -> Key block -> m (Maybe (Block block))
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getChunk :: a -> Key block -> Offset -> Size -> m (Maybe (Block block))
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hasBlock :: a -> Key block -> m Bool
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listBlocks :: a -> ( Key block -> m () ) -> m ()
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