aboutsummaryrefslogtreecommitdiff
path: root/tools.ml
blob: f8f03cb6e3eb53f509e065c990642781b224346d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
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 Num = struct

  include Num

  let of_float_string a = begin
    try
      let ipart_s,fpart_s = String.split a ~by:'.' in
      let ipart = if ipart_s = "" then Num.Int 0 else Num.num_of_string ipart_s in
      let fpart =
        if fpart_s = "" then Num.Int 0
        else
          let fpart = Num.num_of_string fpart_s in
          let num10 = Num.num_of_int 10 in
          let frac = Num.power_num num10 (Num.num_of_int (String.length fpart_s)) in
          Num.div_num fpart frac
      in
      Num.add_num ipart fpart
    with Not_found -> Num.num_of_string a
  end

  let of_float f = begin
    match classify_float f with
    | FP_normal
    | FP_subnormal ->
      let x,e = frexp f in
      let n,e =
        Big_int.big_int_of_int64 (Int64.of_float (ldexp x 52)),
        (e-52)
      in
      if e >= 0 then
        Big_int (Big_int.shift_left_big_int n e)
      else
        Num.div_num
          (Big_int n)
          (Big_int Big_int.(shift_left_big_int unit_big_int ~-e))
    | FP_zero -> Num.num_of_int 0
    | FP_nan -> Num.div_num (Num.num_of_int 0) (Num.num_of_int 0)
    | FP_infinite ->
      if f >= 0. then
        Num.div_num (Num.num_of_int 1) (Num.num_of_int 0)
      else
        Num.div_num (Num.num_of_int (-1)) (Num.num_of_int 0)
    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