mirror of
https://github.com/c-cube/ocaml-containers.git
synced 2025-12-06 11:15:31 -05:00
add more functions to CCHashTrie
This commit is contained in:
Simon Cruanes
parent
c9a4bbd75a
commit
6f388b5d3c
3 changed files with 97 additions and 18 deletions
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@ -4,6 +4,7 @@
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(** {1 Hash Tries} *)
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type 'a sequence = ('a -> unit) -> unit
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type 'a gen = unit -> 'a option
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type 'a printer = Format.formatter -> 'a -> unit
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type 'a ktree = unit -> [`Nil | `Node of 'a * 'a ktree list]
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@ -15,14 +16,13 @@ module type FIXED_ARRAY = sig
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val length : int (* 2 power length_log *)
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val get : 'a t -> int -> 'a
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val set : 'a t -> int -> 'a -> 'a t
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val update : 'a t -> int -> ('a -> 'a) -> 'a t
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val set : mut:bool -> 'a t -> int -> 'a -> 'a t
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val update : mut:bool -> 'a t -> int -> ('a -> 'a) -> 'a t
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val remove : empty:'a -> 'a t -> int -> 'a t (* put back [empty] there *)
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val iter : ('a -> unit) -> 'a t -> unit
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val fold : ('b -> 'a -> 'b) -> 'b -> 'a t -> 'b
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end
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(* TODO: add update again, to call popcount only once *)
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module type S = sig
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module A : FIXED_ARRAY
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@ -47,8 +47,18 @@ module type S = sig
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val remove : key -> 'a t -> 'a t
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val update : key -> ('a option -> 'a option) -> 'a t -> 'a t
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(** [update k f m] calls [f (Some v)] if [get k m = Some v], [f None]
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otherwise. Then, if [f] returns [Some v'] it binds [k] to [v'],
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if [f] returns [None] it removes [k] *)
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val cardinal : _ t -> int
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val choose : 'a t -> (key * 'a) option
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val choose_exn : 'a t -> key * 'a
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(** @raise Not_found if not pair was found *)
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val iter : (key -> 'a -> unit) -> 'a t -> unit
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val fold : ('b -> key -> 'a -> 'b) -> 'b -> 'a t -> 'b
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@ -67,6 +77,12 @@ module type S = sig
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val to_seq : 'a t -> (key * 'a) sequence
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val add_gen : 'a t -> (key * 'a) gen -> 'a t
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val of_gen : (key * 'a) gen -> 'a t
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val to_gen : 'a t -> (key * 'a) gen
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(** {6 IO} *)
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val print : key printer -> 'a printer -> 'a t printer
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@ -97,12 +113,12 @@ module A32 : FIXED_ARRAY = struct
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let get a i = Array.get a i
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let set a i x =
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let a' = Array.copy a in
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let set ~mut a i x =
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let a' = if mut then a else Array.copy a in
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a'.(i) <- x;
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a'
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let update a i f = set a i (f (get a i))
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let update ~mut a i f = set ~mut a i (f (get a i))
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let remove ~empty a i =
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let a' = Array.copy a in
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@ -176,7 +192,7 @@ module A_SPARSE : FIXED_ARRAY = struct
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let real_idx = popcount (a.bits land (idx- 1)) in
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a.arr.(real_idx)
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let set a i x =
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let set ~mut a i x =
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let idx = 1 lsl i in
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let real_idx = popcount (a.bits land (idx -1)) in
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if a.bits land idx = 0
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@ -193,12 +209,12 @@ module A_SPARSE : FIXED_ARRAY = struct
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{a with bits; arr}
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) else (
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(* replace element at [real_idx] *)
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let arr = Array.copy a.arr in
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let arr = if mut then a.arr else Array.copy a.arr in
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arr.(real_idx) <- x;
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{a with arr}
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)
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let update a i f =
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let update ~mut a i f =
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let idx = 1 lsl i in
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let real_idx = popcount (a.bits land (idx -1)) in
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if a.bits land idx = 0
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@ -218,7 +234,7 @@ module A_SPARSE : FIXED_ARRAY = struct
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) else (
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let x = f a.arr.(real_idx) in
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(* replace element at [real_idx] *)
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let arr = Array.copy a.arr in
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let arr = if mut then a.arr else Array.copy a.arr in
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arr.(real_idx) <- x;
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{a with arr}
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)
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@ -357,7 +373,7 @@ module Make(Key : KEY)
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| N (leaf, a) ->
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if Hash.is_0 h
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then N (add_list_ k v leaf, a)
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else N (leaf, add_to_array_ k v ~h a)
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else N (leaf, add_to_array_ ~mut:false k v ~h a)
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(* make an array containing a leaf, and insert (k,v) in it *)
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and make_array_ ~leaf ~h_leaf:h' k v ~h =
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@ -368,21 +384,21 @@ module Make(Key : KEY)
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(* put leaf in the right bucket *)
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let i = Hash.rem h' in
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let h'' = Hash.quotient h' in
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A.set a i (L (h'', leaf)), Nil
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A.set ~mut:true a i (L (h'', leaf)), Nil
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in
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(* then add new node *)
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let a, leaf =
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if Hash.is_0 h then a, add_list_ k v leaf
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else add_to_array_ k v ~h a, leaf
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else add_to_array_ ~mut:true k v ~h a, leaf
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in
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N (leaf, a)
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(* add k->v to [a] *)
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and add_to_array_ k v ~h a =
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and add_to_array_ ~mut k v ~h a =
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(* insert in a bucket *)
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let i = Hash.rem h in
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let h' = Hash.quotient h in
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A.update a i (fun x -> add_ k v ~h:h' x)
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A.update ~mut a i (fun x -> add_ k v ~h:h' x)
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let add k v m = add_ k v ~h:(hash_ k) m
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@ -422,7 +438,7 @@ module Make(Key : KEY)
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let new_t = remove_rec_ k ~h:h' (A.get a i) in
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if is_empty new_t
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then leaf, A.remove ~empty:E a i (* remove sub-tree *)
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else leaf, A.set a i new_t
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else leaf, A.set ~mut:false a i new_t
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in
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if is_empty_list_ leaf && is_empty_arr_ a
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then E
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@ -430,6 +446,15 @@ module Make(Key : KEY)
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let remove k m = remove_rec_ k ~h:(hash_ k) m
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let update k f m =
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let h = hash_ k in
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let opt_v = try Some (get_exn_ k ~h m) with Not_found -> None in
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match opt_v, f opt_v with
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| None, None -> m
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| Some _, Some v
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| None, Some v -> add_ k v ~h m
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| Some _, None -> remove_rec_ k ~h m
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let iter f t =
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let rec aux = function
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| E -> ()
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@ -471,6 +496,42 @@ module Make(Key : KEY)
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let to_seq m yield = iter (fun k v -> yield (k,v)) m
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let rec add_gen m g = match g() with
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| None -> m
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| Some (k,v) -> add_gen (add k v m) g
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let of_gen g = add_gen empty g
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(* traverse the tree by increasing hash order, where the order compares
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hashes lexicographically by A.length_log-wide chunks of bits,
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least-significant chunks first *)
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let to_gen m =
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let st = Stack.create() in
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Stack.push m st;
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let rec next() =
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if Stack.is_empty st then None
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else match Stack.pop st with
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| E -> next ()
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| S (_,k,v) -> Some (k,v)
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| L (_, Nil) -> next()
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| L (h, Cons(k,v,tl)) ->
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Stack.push (L (h, tl)) st; (* tail *)
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Some (k,v)
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| N (l, a) ->
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A.iter
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(fun sub -> Stack.push sub st)
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a;
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Stack.push (L (Hash.zero, l)) st; (* leaf *)
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next()
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in
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next
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let choose m = to_gen m ()
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let choose_exn m = match choose m with
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| None -> raise Not_found
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| Some (k,v) -> k, v
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let print ppk ppv out m =
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let first = ref true in
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iter
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@ -17,6 +17,7 @@
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*)
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type 'a sequence = ('a -> unit) -> unit
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type 'a gen = unit -> 'a option
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type 'a printer = Format.formatter -> 'a -> unit
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type 'a ktree = unit -> [`Nil | `Node of 'a * 'a ktree list]
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@ -27,8 +28,8 @@ module type FIXED_ARRAY = sig
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val length_log : int
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val length : int (* 2 power length_log *)
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val get : 'a t -> int -> 'a
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val set : 'a t -> int -> 'a -> 'a t
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val update : 'a t -> int -> ('a -> 'a) -> 'a t
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val set : mut:bool -> 'a t -> int -> 'a -> 'a t
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val update : mut:bool -> 'a t -> int -> ('a -> 'a) -> 'a t
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val remove : empty:'a -> 'a t -> int -> 'a t (* put back [empty] there *)
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val iter : ('a -> unit) -> 'a t -> unit
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val fold : ('b -> 'a -> 'b) -> 'b -> 'a t -> 'b
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@ -59,8 +60,18 @@ module type S = sig
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val remove : key -> 'a t -> 'a t
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val update : key -> ('a option -> 'a option) -> 'a t -> 'a t
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(** [update k f m] calls [f (Some v)] if [get k m = Some v], [f None]
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otherwise. Then, if [f] returns [Some v'] it binds [k] to [v'],
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if [f] returns [None] it removes [k] *)
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val cardinal : _ t -> int
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val choose : 'a t -> (key * 'a) option
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val choose_exn : 'a t -> key * 'a
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(** @raise Not_found if not pair was found *)
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val iter : (key -> 'a -> unit) -> 'a t -> unit
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val fold : ('b -> key -> 'a -> 'b) -> 'b -> 'a t -> 'b
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@ -79,6 +90,12 @@ module type S = sig
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val to_seq : 'a t -> (key * 'a) sequence
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val add_gen : 'a t -> (key * 'a) gen -> 'a t
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val of_gen : (key * 'a) gen -> 'a t
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val to_gen : 'a t -> (key * 'a) gen
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(** {6 IO} *)
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val print : key printer -> 'a printer -> 'a t printer
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@ -70,6 +70,7 @@ val fold : (int -> 'a -> 'b -> 'b) -> 'a t -> 'b -> 'b
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val choose : 'a t -> (int * 'a) option
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val choose_exn : 'a t -> int * 'a
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(** @raise Not_found if not pair was found *)
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val union : (int -> 'a -> 'a -> 'a) -> 'a t -> 'a t -> 'a t
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