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|
let u = UTF8.from_utf8string
module Option = struct
let map f = function
| Some x -> Some (f x)
| None -> None
let iter f = function
| Some x -> f x
| None -> ()
let bind f = function
| None -> None
| Some x -> f x
let default v = function
| None -> v
| Some x -> x
end
module String = struct
include String
let split str ~by:sep = begin
let p = String.index str sep in
let slen = String.length str in
String.sub str 0 p, String.sub str (p + 1) (slen - p - 1)
end
let cut str ~by:sep = begin
try String.sub str 0 @@ String.index str sep with
| Not_found -> str
end
let string_of_ints v = begin
let buff = Buffer.create 1 in
let rec convert value = begin
Buffer.add_char buff @@ char_of_int @@ value land 0xFF;
let rem = value lsr 8 in
match rem with
| 0 -> Buffer.contents buff
| x -> convert x
end in
let res = convert v in
let buff' = Buffer.create @@ String.length res in
for i = ((String.length res) - 1) downto 0 do
Buffer.add_char buff' @@ String.get res i
done;
Buffer.contents buff'
end
let print_buffer f t = begin
let buff = UTF8.Buffer.create 16 in
f buff t;
UTF8.Buffer.contents buff
end
let filter_float str = begin
let l = String.length str in
if l > 0 && String.get str (l - 1) = '.' then
String.sub str 0 (l - 1)
else
str
end
end
module List = struct
(** fold_left over only the first element *)
let fst f init = function
| hd::tl -> f init hd
| [] -> init
let printb ?(first=(u"(")) ?(last=(u")")) ?(sep=(u",")) f buffer elems = begin
let rec print = begin function
| [] -> ()
| hd::[] ->
f buffer hd;
| hd::tl ->
f buffer hd;
UTF8.Buffer.add_string buffer sep;
print tl
end in
UTF8.Buffer.add_string buffer first;
print elems;
UTF8.Buffer.add_string buffer last
end
let rec find_map f = begin function
| [] -> raise Not_found
| hd::tl -> begin match f hd with
| Some x -> x
| None -> (find_map[@tailrec]) f tl
end
end
let rec findOpt p = begin function
| [] -> None
| x::l ->
if p x then
Some(x)
else
findOpt p l
end
and find_map2 p = begin function
| [] -> raise Not_found
| x::l ->
begin try find_map p x with
Not_found -> find_map2 p l
end
end
(** Convert the list [l] as an array *)
let to_array l = begin
let elems = ref l in
let build = fun _ ->
begin match (!elems) with
| [] -> assert false
| hd::tl ->
elems := tl;
hd
end
in Array.init (List.length l) build
end
let linearize elems = begin
let rec _linearize acc (elems:'a list list) : 'a list = begin
let split (hds, tls) = function
| hd::tl -> hd::hds, tl::tls
| [] -> hds, tls
in
match elems with
| [] -> acc
| elems ->
let acc, tls = List.fold_left split (acc, []) elems in
_linearize acc tls
end in
List.rev @@ _linearize [] elems
end
end
module Tuple2 = struct
let fst = Pervasives.fst
let snd = Pervasives.snd
let map1 f (a, b) = (f a, b)
let map2 f (a, b) = (a, f b)
let replace1 v (a, b) = (v, b)
let replace2 v (a, b) = (a, v)
let printb ?(first="(") ?(last=")") ?(sep=",") format1 format2 out (a, b) = begin
UTF8.Printf.bprintf out "%s%a%s%a%s"
first
format1 a
sep
format2 b
last
end
end
module Tuple3 = struct
let fst (a, b, c) = a
let snd (a, b, c) = b
let thd (a, b, c) = c
let map f (a, b, c) = (f a, f b, f c)
let map1 f (a, b, c) = (f a, b, c)
let map2 f (a, b, c) = (a, f b, c)
let map3 f (a, b, c) = (a, b, f c)
let replace1 v (a, b, c) = (v, b, c)
let replace2 v (a, b, c) = (a, v, c)
let replace3 v (a, b, c) = (a, b, v)
end
module NCurses = struct
type mouse_event =
| BUTTON1_PRESSED
| BUTTON1_RELEASED
| BUTTON1_CLICKED
| BUTTON1_DOUBLE_CLICKED
| BUTTON1_TRIPLE_CLICKED
| BUTTON2_PRESSED
| BUTTON2_RELEASED
| BUTTON2_CLICKED
| BUTTON2_DOUBLE_CLICKED
| BUTTON2_TRIPLE_CLICKED
| BUTTON3_PRESSED
| BUTTON3_RELEASED
| BUTTON3_CLICKED
| BUTTON3_DOUBLE_CLICKED
| BUTTON3_TRIPLE_CLICKED
| BUTTON4_PRESSED
| BUTTON4_RELEASED
| BUTTON4_CLICKED
| BUTTON4_DOUBLE_CLICKED
| BUTTON4_TRIPLE_CLICKED
| BUTTON_SHIFT
| BUTTON_CTRL
| BUTTON_ALT
| ALL_MOUSE_EVENTS
| REPORT_MOUSE_POSITION
type event_type
external set_mouse_event: mouse_event list -> unit = "c_set_mouse_event"
external get_mouse_event: unit -> (int * event_type * (int * int * int)) option = "c_get_mouse_event"
external is_event_of_type: mouse_event -> event_type -> bool = "c_is_event_of_type"
end
let try_finally f except =
try let res = f () in
except ();
res
with e ->
except ();
raise e
type (_,_) cmp =
| Eq : ('a,'a) cmp
| Lt : ('a,'b) cmp
| Gt : ('a,'b) cmp
(** Existencial type for comparing two types.
This type has no utility, except for structural comparison between two
values.
*)
type existencial = Ex: 'a -> existencial
module type COMPARABLE_TYPE = sig
type 'a t
val comp: 'a t -> 'b t -> ('a, 'b) cmp
end
module ArrayMap(Ord: COMPARABLE_TYPE) = struct
type 'a key = 'a Ord.t
type t = Val : ('a key * 'a) array -> t
let find: type a. a key -> t -> a = begin fun k (Val map) ->
let rec find_ idx : a = begin
let x, v = Array.get map idx in
match Ord.comp x k with
| Eq -> v
| Lt -> find_ ((2 * idx) + 1)
| Gt -> find_ ((2 * idx) + 2)
end in
find_ 0
end
let from_list l = begin
let compare (key_x, _) (key_y, _) = match Ord.comp key_x key_y with
| Eq -> 0
| Lt -> -1
| Gt -> 1
in
let arr = List.to_array l in
Array.sort compare arr;
Val arr
end
end
(** Map for any comparable value.
This map can bind 'a key -> 'a value as long as the key are comparable.
*)
module Map(Ord: COMPARABLE_TYPE) = struct
type 'a key = 'a Ord.t
type wrapper = Ex: 'a key * 'a -> wrapper
type t =
| Empty : t
| Node : t * 'a key * 'a * t * int -> t
let singleton x d = Node(Empty, x, d, Empty, 1)
let empty = Empty
let is_empty = function
| Empty -> true
| _ -> false
let height = function
| Empty -> 0
| Node(_,_,_,_,h) -> h
let create l x d r =
let hl = height l and hr = height r in
Node(l, x, d, r, (if hl >= hr then hl + 1 else hr + 1))
let bal l x d r =
let hl = match l with Empty -> 0 | Node(_,_,_,_,h) -> h in
let hr = match r with Empty -> 0 | Node(_,_,_,_,h) -> h in
if hl > hr + 2 then begin
match l with
Empty -> invalid_arg "Map.bal"
| Node(ll, lv, ld, lr, _) ->
if height ll >= height lr then
create ll lv ld (create lr x d r)
else begin
match lr with
Empty -> invalid_arg "Map.bal"
| Node(lrl, lrv, lrd, lrr, _)->
create (create ll lv ld lrl) lrv lrd (create lrr x d r)
end
end else if hr > hl + 2 then begin
match r with
Empty -> invalid_arg "Map.bal"
| Node(rl, rv, rd, rr, _) ->
if height rr >= height rl then
create (create l x d rl) rv rd rr
else begin
match rl with
Empty -> invalid_arg "Map.bal"
| Node(rll, rlv, rld, rlr, _) ->
create (create l x d rll) rlv rld (create rlr rv rd rr)
end
end else
Node(l, x, d, r, (if hl >= hr then hl + 1 else hr + 1))
let rec add: type a. a key -> a -> t -> t = begin fun x data t -> match t with
| Empty -> Node(Empty, x, data, Empty, 1)
| Node(l, v, d, r, h) ->
match Ord.comp x v with
| Eq -> Node(l, x, data, r, h)
| Lt -> bal (add x data l) v d r
| Gt -> bal l v d (add x data r)
end
let rec find: type a. a key -> t -> a = begin fun x t -> match t with
| Empty -> raise Not_found
| Node(l, k, v, r, _) ->
match Ord.comp x k with
| Eq -> v
| Lt -> find x l
| Gt -> find x r
end
let rec mem: type a. a key -> t -> bool = begin fun x t -> match t with
| Empty -> false
| Node(l, k, v, r, _) ->
match Ord.comp x k with
| Eq -> true
| Lt -> mem x l
| Gt -> mem x r
end
(*
let rec fold: ('a -> wrapper -> 'a) -> 'a -> t -> 'a =
begin fun f init t -> match t with
| Empty -> init
| Node(l, k, v, r, _) ->
let res_left = fold f init l in
let result = f res_left @@ Ex (k, v) in
fold f result r
end
*)
end
|