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open StdLabels
(* Enclose the type definition into a warning removval in order to hide some
auto-generated values *)
[@@@warning "-32"]
type t =
| Wellplaced
| Misplaced
| Missing
[@@deriving enum]
[@@@warning "+32"]
let m = Float.of_int (1 + max)
(** Get the index of a validity result *)
let index_of_result : t array -> int =
fun elems ->
let _, value =
Array.fold_left elems ~init:(0., 0.) ~f:(fun (pos, acc) content ->
let v = Float.of_int (to_enum content) in
let acc' = acc +. (v *. (m ** pos)) in
(pos +. Float.one, acc') )
in
Float.to_int value
let index_to_result : base:int -> int -> t array =
fun ~base n ->
let rec _f acc n i =
let next = Float.round (n /. m)
and rem = Float.(to_int @@ rem n m) in
match (rem, i) with
| _, 0 -> Array.of_list acc
| n, _ ->
( match of_enum n with
| None -> Array.of_list acc
| Some v -> _f (v :: acc) next (i - 1) )
in
_f [] (Float.of_int n) base
(** Build a sequence of all the possible status for a given number of letters *)
let sequence : int -> t array Seq.t =
fun base ->
let max_element = Float.to_int @@ (m ** Float.of_int base) in
Seq.unfold
(fun n ->
if n < max_element then Some (index_to_result ~base n, n + 1) else None )
0
let compare_words : string -> ref:string -> t array option =
fun w1 ~ref ->
let l1 = String.length w1 in
if l1 <> String.length ref
then None
else
let result =
Array.init l1 ~f:(fun i ->
let c1 = String.get w1 i
and c2 = String.get ref i in
let state =
if Char.equal c1 c2
then Wellplaced
else if String.contains ref c1
then Misplaced
else Missing
in
state )
in
Some result
let to_criteria : char -> int -> t -> Criteria.t list -> Criteria.t list =
fun c i t acc ->
match t with
| Wellplaced -> Criteria.add (Criteria.Contain (c, Some i)) acc
| Missing -> Criteria.add (Criteria.NotContain (c, None)) acc
| Misplaced ->
Criteria.add
(Criteria.NotContain (c, Some i))
(Criteria.add (Criteria.Contain (c, None)) acc)
let to_criterias : string -> t array -> Criteria.t list =
fun word t ->
let l, _ =
Array.fold_left t ~init:([], 0) ~f:(fun (acc, i) t ->
let acc = to_criteria (String.get word i) i t acc in
(acc, i + 1) )
in
List.rev l
|
