forked from alokmenghrajani/opalang
-
Notifications
You must be signed in to change notification settings - Fork 0
/
cactutf.ml
551 lines (511 loc) · 18.2 KB
/
cactutf.ml
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
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
(*
Copyright © 2011 MLstate
This file is part of OPA.
OPA is free software: you can redistribute it and/or modify it under the
terms of the GNU Affero General Public License, version 3, as published by
the Free Software Foundation.
OPA is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for
more details.
You should have received a copy of the GNU Affero General Public License
along with OPA. If not, see <http://www.gnu.org/licenses/>.
*)
(*
-------------------
| cactUTF section |
-------------------
*)
(*
* Note of the authors:
*
* Beware of the stings !
**)
type unicode = int
type unicode_index = int
type bytes_index = int
let (@>) s pos =
int_of_char(s.[pos])
(*
FIXME: wild error management, incorrect
*)
exception Error of string
let myerror s = raise (Error s)
let warning_or_error s =
if true then prerr_endline s else myerror s
(* END OF FIXME *)
exception Lenbytes of int
let pre_lenbytes i =
if (i < 128) then
1
else if (i < 192) then
raise (Lenbytes i)
else if (i < 224) then
2
else if (i < 240) then
3
else
4
(*
For one Unicode code, return the number of bytes needed for
a representation in UTF-8.
*)
let lenbytes i =
try
pre_lenbytes i
with
Lenbytes i ->
warning_or_error (Printf.sprintf "bslCactutf.lenbytes : invalid UTF8 opcode: %d" i);
1
(* determine if a bytechar is the first of a utf-8 char *)
let is_first_char i = i < 128 || 192 <= i
let is_middle_char i = 128 <= i && i < 192
(*
** prev()
** Return the index of the first utf8-char before or at the given char.
*)
let prev_first_char str i =
let len = String.length str in
if i>= len then myerror (Printf.sprintf "prev_first_char : index too big (i=%d, len=%d)" i len);
let rec aux i =
if i<0 then myerror "prev_first_char : reach the begin of the string"
else (if is_middle_char (str @> i) then aux (i-1) else i)
in aux i
(*
(*register prev : string -> int -> int*)
let prev_first_char s n =
let i4 = s @> (n - 1)
in
if (i4 < 128) then (* one byte *)
n - 1
else if (i4 >= 192) then (* 0b11xxxxxx *)
myerror "cactutf.opa : prev : error in UTF8 [1]"
else
let i3 = s @> (n - 2)
in
if (i3 < 128) then (* 0b0xxxxxxx *)
myerror "cactutf.opa : prev : error in UTF8 [2]"
else if (i3 >= 224) then (* 0b111xxxxx *)
myerror "cactutf.opa : prev : error in UTF8 [3]"
else if (i3 < 192) then (* 0b110xxxxx *)
n - 2
else
let i2 = s @> (n - 3)
in
if (i2 < 128) then
myerror "cactutf.opa : prev : error in UTF8 [4]"
else if (i2 >= 224) then (* three bytes *)
n - 3
else if (i2 >= 192) then
myerror "cactutf.opa : prev : error in UTF8 [5]"
else
let i1 = s @> (n - 4)
in
if (i1 >= 224) then (* four bytes *)
n - 4
else
myerror "cactutf.opa : prev : error in UTF8 [6]"
*)
(* a light version of next *)
let pre_next str n = n + lenbytes (str @> n)
let check str =
let len = String.length str in
let rec aux i =
if i<len then aux (pre_next str i)
else if i=len then true
else false
in
try aux 0 with Error _ -> false
let mess_invalid_char str n =
let v = str @> n in Printf.sprintf "the char at raw position %d is invalid [code is %d] : <<%c>> , global string validity is %b" n v (str.[n]) (check str)
let length_until s pos =
let rec aux s c i len =
if (i >= len) then
c
else
let n = s @> i
in
let k = lenbytes n
in
aux s (c + 1) (i + k) len
in
aux s 0 0 pos
let length s =
length_until s (String.length s)
(*
** next()
** Return the index of the next Unicode character.
*)
(*##register next : string -> int -> int*)
let next str n =
try
n + pre_lenbytes (str @> n)
with Lenbytes _ -> warning_or_error ("bslCactutf.next : "^(mess_invalid_char str n)); n+1
(*
** prev()
** Return the index of the previous Unicode character.
*)
(*##register prev : string -> int -> int*)
let prev str n =
(* FIND THE PREVIOUS CHAR *)
let i = prev_first_char str (n-1) in
if i<0 then ( warning_or_error ("bslCactutf.prev"); i )
else i
(*
** nth()
** Return the index of the n-th Unicode character.
** use a cache to speed-up similar calls
** memoize last n-th caracter position and restart from it
*)
let nth =
let cache_s = ref "" in
let cache_th= ref 0 in
let cache_i = ref 0 in
fun str th ->
try
let len = String.length str in
if not(!cache_s == str) then begin
(* if str change then start from begining
TODO could start from begin or end to be at least 2x faster
*)
cache_th:= 0;
cache_i := 0;
cache_s := str;
end;
(* TODO could start from begin or end to be faster if previous cache is not adapted *)
(* disabled this warning since it floods TT and is useless if nobody works on improving it
* if !cache_th < th-100 || !cache_th > th+100 then (Printf.printf "bslCactutf.nth may slow you"; flush stdout);*)
if !cache_th < th then (
while !cache_th<th && (!cache_i) < len do
cache_th := !cache_th +1;
cache_i := next str !cache_i;
done;
!cache_i
) else (
while !cache_th > th && (!cache_i)>= 0 do
cache_th := !cache_th -1;
cache_i := prev str !cache_i;
done;
!cache_i
)
with _ ->
warning_or_error (Printf.sprintf "bslCactutf.nth : utf-8 position %d[=>%d], global string validity is %b" (!cache_th) (!cache_i) (check str));
!cache_i
type range_validity =
| Invalid_range of string (* an error message is given *)
| Valid_range (* the requested substring *)
(*
* Return a pair
* - a flag saying if the requested substring was valid
* - the unicode substring (clipped to the size of the string if needed)
*)
let sub_no_failure s i n =
if n = 0 then (Valid_range, "") else (* used to work that way, should be improved
* bacause n = 0 and i < 0 is not valid
* but when n = 0, and i = 0, we say
* [pj = nth s (-1)] which prints an unwanted
* error ! *)
let len = String.length s in
let pi = nth s i in
let pj = nth s (i+n-1) in
let pi' = max pi 0 in
let pj' =
if pj >= len then
len - pi'
else
min (pj-pi'+lenbytes (s @> pj)) (len-pi') in
let substring = String.sub s pi' pj' in
let validity =
if i < 0 then
Invalid_range "cactutf.opa : sub(_, i<0 ,_) : index is negative"
else if n < 0 then
Invalid_range "cactutf.opa : sub(_, n<0 ,_) : index is negative"
else if n = 0 then
Valid_range
else if pi >= len then
Invalid_range (Printf.sprintf "cactutf.opa : sub(s, i=%d>utf_length(s)=%d ,_) : the index is too big, cryptic info=(%d,%d)" i (length s) pi len)
else if pj >= len then
Invalid_range (Printf.sprintf "cactutf.opa : sub(s, i=%d ,n=%d | i+n=%d>utf_length(s)=%d ) : the required length is too big, cryptic info=(%d,%d)" i n (i+n) (length s) pj len)
else
Valid_range in
(validity, substring)
(*
** sub()
** Return an Unicode sub-string.
*)
(*##register sub : string -> int -> int -> string*)
let sub s i n =
let validity, substring = sub_no_failure s i n in
( match validity with
| Invalid_range s -> warning_or_error s
| Valid_range -> ()
);
substring
(*##register sub_opt : string -> int -> int -> string option*)
let sub_opt s i n =
match sub_no_failure s i n with
| (Invalid_range _, _) -> None
| (Valid_range, s) -> Some s
let one_byte b1 = b1
(*
** two_bytes()
** Encode two bytes into one Unicode character.
** 0b110xxxx 0b10xxxxxx
*)
let two_bytes b1 b2 =
(((b1 - 192) * 64) + (b2 - 128))
(*
** three bytes()
*)
let three_bytes b1 b2 b3 =
(((b1 - 224) * 4096) + ((b2 - 128) * 64) + (b3 - 128))
(*
** four bytes()
*)
let four_bytes b1 b2 b3 b4 =
(((b1 - 240) * 262144) + ((b2 - 128) * 4096) + ((b3 - 128) * 64) + (b4 - 128))
(*
** charutf8()
** Return the Unicode code at the index in a string.
*)
(*register charutf8 : string -> int -> int*)
let charutf8 str pos =
let i = str @> pos
in
let len = lenbytes i
in
if (len = 1) then
i
else if (len = 2) then
two_bytes i (str @> (pos + 1))
else if (len = 3) then
three_bytes i (str @> (pos + 1)) (str @> (pos + 2))
else
four_bytes i (str @> (pos + 1)) (str @> (pos + 2)) (str @> (pos + 3))
(*
** get()
** Return the Unicode code of the nth Unicode character.
*)
(*##register get : string -> int -> int*)
let get str n =
charutf8 str (nth str n)
(*
** look()
** Return the Unicode code using the index (and not the nth).
** A lot faster, but only when using index instead of position.
*)
(*##register look : string -> int -> int*)
let look str i =
charutf8 str i
(*
*)
let csize n =
if (n < 128) then
1
else if (n < 2048) then
2
else if (n < 65536) then
3
else
4
(*
** cons()
** Build a new string from a character.
*)
(*##register cons : int -> string*)
let cons c =
let s = csize c in
let str = String.create s in
if (s = 1) then
(str.[0] <- char_of_int(c);
str)
else if (s = 2) then
let n1 = c / 64 in
let n2 = c - (n1 * 64) in
str.[0] <- char_of_int(n1 + 192);
str.[1] <- char_of_int(n2 + 128);
str
else if (s = 3) then
let n1 = c / 4096 in
let n2 = (c - (n1 * 4096)) / 64 in
let n3 = (c - (n1 * 4096) - (n2 * 64)) in
str.[0] <- char_of_int(n1 + 224);
str.[1] <- char_of_int(n2 + 128);
str.[2] <- char_of_int(n3 + 128);
str
else
let n1 = c / 262144 in
let n2 = (c - (n1 * 262144)) / 4096 in
let n3 = (c - (n1 * 262144) - (n2 * 4096)) / 64 in
let n4 = (c - (n1 * 262144) - (n2 * 4096)) - (n3 * 64) in
str.[0] <- char_of_int(n1 + 240);
str.[1] <- char_of_int(n2 + 128);
str.[2] <- char_of_int(n3 + 128);
str.[3] <- char_of_int(n4 + 128);
str
(*
** uppercase()
** Return an Uppercase version of the string.
** Beware of the Braille and some greeks caracters.
*)
(*##register uppercase : string -> string*)
let uppercase str =
let myupp i =
if ((i >= 97) && (i <= 123)) (* US-ASCII *)
|| ((i >= 224) && (i <= 246)) (* ISO-8859-1 (latin-1) v *)
|| ((i >= 248) && (i <= 254)) (* ISO-8859-1 (latin-1) ^ *)
|| ((i >= 65345) && (i <= 65370)) (* caracteres demi/pleine chasse *)
|| ((i >= 944) && (i <= 974)) (* grec *)
|| ((i >= 1072) && (i <= 1103)) then (* cyrillique *)
i - 32
else if ((i >= 257) && (i <= 319) && ((i mod 2) = 1)) (* latin étendu A v *)
|| ((i >= 314) && (i <= 328) && ((i mod 2) = 0))
|| ((i >= 331) && (i <= 375) && ((i mod 2) = 1))
|| (i = 378) || (i = 380) || (i = 382) (* latin étendu A ^ *)
|| (i = 389) || (i = 392) || (i = 396) || (i = 402) (* latin étendu B v *)
|| (i = 409) || (i = 417) || (i = 419) || (i = 421)
|| (i = 424) || (i = 429) || (i = 432) || (i = 434)
|| (i = 436) || (i = 438) || (i = 453) || (i = 456)
|| (i = 459)
|| ((i >= 462) && (i <= 476) && ((i mod 2) = 0))
|| ((i >= 479) && (i <= 495) && ((i mod 2) = 1))
|| (i = 498)
|| ((i >= 501) && (i <= 563) && ((i mod 2) = 1))
|| (i = 572) || (i = 578) || (i = 585) || (i = 587)
|| (i = 589) || (i = 591) (* latin étendu B ^ *)
|| ((i >= 7680) && (i <= 7935) && ((i mod 2) = 1)) (* latin étendu additionnel *)
|| (i = 8580) (* nombre latin : facteur 10 *)
|| ((i >= 977) && (i <= 1007) && ((i mod 2) = 1)) (* grec avec accents *)
|| ((i >= 1120) && (i <= 1153) && ((i mod 2) = 1)) (* cyrillique v *)
|| ((i >= 1163) && (i <= 1215) && ((i mod 2) = 1))
|| ((i >= 1217) && (i <= 1230) && ((i mod 2) = 0))
|| ((i >= 1232) && (i <= 1279) && ((i mod 2) = 1)) (* cyrillique ^ *)
|| ((i >= 1280) && (i <= 1299) && ((i mod 2) = 1)) then (* cyrillique additionnel *)
i - 1
else if (i = 454) || (i = 457) || (i = 460) || (i = 499) then (* latin étendu B doubles lettres *)
i - 2
else if (i = 255) then (* special case : ÿ. Latin 1&A.*)
376
else if ((i >= 9424) && (i <= 9449)) then (* lettres pastilles *)
i - 26
else if ((i >= 1104) && (i <= 1119)) then (* cyrillique *)
i - 80
else if ((i >= 7936) && (i <= 8047) && ((i mod 16) <= 7)) (* grec polytonique v *)
|| ((i >= 8064) && (i <= 8111) && ((i mod 16) <= 7)) then (* grev polytonique ^ *)
i + 8
else if ((i >= 1377) && (i <= 1414)) then (* arménien *)
i - 48
else if ((i >= 8560) && (i <= 8575)) then (* nombres latins *)
i - 16
else
i
in
let rec aux len pos accu =
if (len = 0) then
accu
else
aux (len - 1) (next str pos) (accu ^ cons (myupp (look str pos)))
in
aux (length str) 0 ""
(*
** lowercase()
** See uppercase().
*)
(*##register lowercase : string -> string*)
let lowercase str =
let mylow i =
if ((i >= 65) && (i <= 91)) (* US-ASCII *)
|| ((i >= 192) && (i <= 214)) (* ISO-8859-1 (latin-1) v *)
|| ((i >= 216) && (i <= 222)) (* ISO-8859-1 (latin-1) ^ *)
|| ((i >= 65313) && (i <= 65338)) (* caracteres demi/pleine chasse *)
|| ((i >= 912) && (i <= 942)) (* grec *)
|| ((i >= 1040) && (i <= 1071)) then (* cyrillique *)
i + 32
else if ((i >= 256) && (i <= 319) && ((i mod 2) = 0)) (* latin étendu A v *)
|| ((i >= 313) && (i <= 328) && ((i mod 2) = 1))
|| ((i >= 330) && (i <= 375) && ((i mod 2) = 0))
|| (i = 377) || (i = 379) || (i = 381) (* latin étendu A ^ *)
|| (i = 388) || (i = 391) || (i = 395) || (i = 401) (* latin étendu B v *)
|| (i = 408) || (i = 416) || (i = 418) || (i = 420)
|| (i = 423) || (i = 428) || (i = 431) || (i = 433)
|| (i = 435) || (i = 437) || (i = 453) || (i = 456)
|| (i = 459)
|| ((i >= 461) && (i <= 476) && ((i mod 2) = 1))
|| ((i >= 478) && (i <= 495) && ((i mod 2) = 0))
|| (i = 498)
|| ((i >= 500) && (i <= 563) && ((i mod 2) = 0))
|| (i = 571) || (i = 577) || (i = 584) || (i = 586)
|| (i = 588) || (i = 590) (* latin étendu B ^ *)
|| ((i >= 7680) && (i <= 7935) && ((i mod 2) = 0)) (* latin étendu additionnel *)
|| (i = 8579) (* nombre latin : facteur 10 *)
|| ((i >= 976) && (i <= 1007) && ((i mod 2) = 0)) (* grec avec accents *)
|| ((i >= 1120) && (i <= 1153) && ((i mod 2) = 0)) (* cyrillique v *)
|| ((i >= 1162) && (i <= 1215) && ((i mod 2) = 0))
|| ((i >= 1217) && (i <= 1230) && ((i mod 2) = 1))
|| ((i >= 1232) && (i <= 1279) && ((i mod 2) = 0)) (* cyrillique ^ *)
|| ((i >= 1280) && (i <= 1299) && ((i mod 2) = 0)) then (* cyrillique additionnel *)
i + 1
else if (i = 452) || (i = 455) || (i = 458) || (i = 497) then (* latin étendu B doubles lettres *)
i + 2
else if (i = 376) then (* special case : ÿ. Latin 1&A.*)
255
else if ((i >= 9398) && (i <= 9423)) then (* lettres pastilles *)
i + 26
else if ((i >= 1024) && (i <= 1039)) then (* cyrillique *)
i + 80
else if ((i >= 7936) && (i <= 8047) && ((i mod 16) > 7)) (* grec polytonique v *)
|| ((i >= 8064) && (i <= 8111) && ((i mod 16) > 7)) then (* grev polytonique ^ *)
i - 8
else if ((i >= 1329) && (i <= 1366)) then (* arménien *)
i + 48
else if ((i >= 8544) && (i <= 8559)) then (* nombres latins *)
i + 16
else
i
in
let rec aux len pos accu =
if (len = 0) then
accu
else
aux (len - 1) (next str pos) (accu ^ cons (mylow (look str pos)))
in
aux (length str) 0 ""
exception Done
(*
let remove_accents s =
let buffer = Buffer.create (String.length s) in
let add = Buffer.add_char buffer in
let add_array a ~start ~length=
for i = 0 to length - 1 do
Utf8.store buffer a.(start + i)
done
in
let lex_one_char = lexer
| [ 192 193 194 195 196 197 65 (*ÀÁÂÃÄÅA*) ] -> add 'A'
| [ 224 225 226 227 228 229 97 (*àáâãäåa*) ] -> add 'a'
| [ 210 211 212 213 214 216 79 (*ÒÓÔÕÖØO*) ] -> add 'O'
| [ 242 243 244 245 246 248 111 (*òóôõöøo*) ]-> add 'o'
| [ 200 201 202 203 69 (*ÈÉÊËE*) ] -> add 'E'
| [ 232 233 234 235 101 (*èéêëe*) ] -> add 'e'
| [ 199 67 (*ÇC*) ] -> add 'C'
| [ 231 99 (*çc*) ] -> add 'c'
| [ 204 205 206 207 73 (*ÌÍÎÏI*) ] -> add 'I'
| [ 236 237 238 239 105 (*ìíîïi*) ] -> add 'i'
| [ 217 218 219 220 85 (*ÙÚÛÜU*) ] -> add 'U'
| [ 249 250 251 252 117 (*ùúûüu*) ] -> add 'u'
| [ 255 121 (*ÿy*) ] -> add 'y'
| [ 209 78 (*ÑN*) ] -> add 'N'
| [ 241 110 (*ñn*) ] -> add 'n'
| eof -> raise Done
| _ -> add_array (Ulexing.get_buf lexbuf) ~start:(Ulexing.get_start lexbuf) ~length:(Ulexing.lexeme_length lexbuf)
in
try
let lexbuf = Ulexing.from_utf8_string s in
while true do
lex_one_char lexbuf
done;
assert false
with
Done -> Buffer.contents buffer
*)
(*##endmodule*)