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Disambiguate between OCaml and Standard ML

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Fix #2208
This commit is contained in:
Thomas Gazagnaire
2015-03-13 15:03:48 +00:00
parent b5472ab753
commit e79607372b
9 changed files with 5252 additions and 0 deletions
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9
lib/linguist/heuristics.rb
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@@ -261,5 +261,14 @@ module Linguist
Language["Makefile"]
end
end
disambiguate "OCaml", "Standard ML" do |data|
if /module|let rec |match\s+(\S+\s)+with/.match(data)
Language["OCaml"]
elsif /=> |case\s+(\S+\s)+of/.match(data)
Language["Standard ML"]
end
end
end
end

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samples/OCaml/cmdliner.ml Normal file
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14
samples/OCaml/common.ml Normal file
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(*
* Copyright (c) 2013 Jeremy Yallop.
*
* This file is distributed under the terms of the MIT License.
* See the file LICENSE for details.
*)
let string_of format v =
let buf = Buffer.create 100 in
let fmt = Format.formatter_of_buffer buf in begin
format fmt v;
Format.pp_print_flush fmt ();
Buffer.contents buf
end

40
samples/OCaml/date.ml Normal file
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(*
* Copyright (c) 2013 Jeremy Yallop.
*
* This file is distributed under the terms of the MIT License.
* See the file LICENSE for details.
*)
open Ctypes
open PosixTypes
open Foreign
type tm
let tm = structure "tm"
let (-:) ty label = field tm label ty
let tm_sec = int -: "tm_sec" (* seconds *)
let tm_min = int -: "tm_min" (* minutes *)
let tm_hour = int -: "tm_hour" (* hours *)
let tm_mday = int -: "tm_mday" (* day of the month *)
let tm_mon = int -: "tm_mon" (* month *)
let tm_year = int -: "tm_year" (* year *)
let tm_wday = int -: "tm_wday" (* day of the week *)
let tm_yday = int -: "tm_yday" (* day in the year *)
let tm_isdst = int -: "tm_isdst" (* daylight saving time *)
let () = seal (tm : tm structure typ)
let time = foreign "time" ~check_errno:true (ptr time_t @-> returning time_t)
let asctime = foreign "asctime" (ptr tm @-> returning string)
let localtime = foreign "localtime" (ptr time_t @-> returning (ptr tm))
let () = begin
let timep = allocate_n ~count:1 time_t in
let time = time timep in
assert (time = !@timep);
let tm = localtime timep in
Printf.printf "tm.tm_mon = %d\n" (getf !@tm tm_mon);
Printf.printf "tm.tm_year = %d\n" (getf !@tm tm_year);
print_endline (asctime tm)
end

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(***********************************************************************)
(* *)
(* OCaml *)
(* *)
(* Xavier Leroy, projet Cristal, INRIA Rocquencourt *)
(* *)
(* Copyright 1996 Institut National de Recherche en Informatique et *)
(* en Automatique. All rights reserved. This file is distributed *)
(* under the terms of the GNU Library General Public License, with *)
(* the special exception on linking described in file ../LICENSE. *)
(* *)
(***********************************************************************)
module type OrderedType =
sig
type t
val compare: t -> t -> int
end
module type S =
sig
type key
type +'a t
val empty: 'a t
val is_empty: 'a t -> bool
val mem: key -> 'a t -> bool
val add: key -> 'a -> 'a t -> 'a t
val singleton: key -> 'a -> 'a t
val remove: key -> 'a t -> 'a t
val merge:
(key -> 'a option -> 'b option -> 'c option) -> 'a t -> 'b t -> 'c t
val compare: ('a -> 'a -> int) -> 'a t -> 'a t -> int
val equal: ('a -> 'a -> bool) -> 'a t -> 'a t -> bool
val iter: (key -> 'a -> unit) -> 'a t -> unit
val fold: (key -> 'a -> 'b -> 'b) -> 'a t -> 'b -> 'b
val for_all: (key -> 'a -> bool) -> 'a t -> bool
val exists: (key -> 'a -> bool) -> 'a t -> bool
val filter: (key -> 'a -> bool) -> 'a t -> 'a t
val partition: (key -> 'a -> bool) -> 'a t -> 'a t * 'a t
val cardinal: 'a t -> int
val bindings: 'a t -> (key * 'a) list
val min_binding: 'a t -> (key * 'a)
val max_binding: 'a t -> (key * 'a)
val choose: 'a t -> (key * 'a)
val split: key -> 'a t -> 'a t * 'a option * 'a t
val find: key -> 'a t -> 'a
val map: ('a -> 'b) -> 'a t -> 'b t
val mapi: (key -> 'a -> 'b) -> 'a t -> 'b t
end
module Make(Ord: OrderedType) = struct
type key = Ord.t
type 'a t =
Empty
| Node of 'a t * key * 'a * 'a t * int
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 singleton x d = Node(Empty, x, d, Empty, 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 empty = Empty
let is_empty = function Empty -> true | _ -> false
let rec add x data = function
Empty ->
Node(Empty, x, data, Empty, 1)
| Node(l, v, d, r, h) ->
let c = Ord.compare x v in
if c = 0 then
Node(l, x, data, r, h)
else if c < 0 then
bal (add x data l) v d r
else
bal l v d (add x data r)
let rec find x = function
Empty ->
raise Not_found
| Node(l, v, d, r, _) ->
let c = Ord.compare x v in
if c = 0 then d
else find x (if c < 0 then l else r)
let rec mem x = function
Empty ->
false
| Node(l, v, d, r, _) ->
let c = Ord.compare x v in
c = 0 || mem x (if c < 0 then l else r)
let rec min_binding = function
Empty -> raise Not_found
| Node(Empty, x, d, r, _) -> (x, d)
| Node(l, x, d, r, _) -> min_binding l
let rec max_binding = function
Empty -> raise Not_found
| Node(l, x, d, Empty, _) -> (x, d)
| Node(l, x, d, r, _) -> max_binding r
let rec remove_min_binding = function
Empty -> invalid_arg "Map.remove_min_elt"
| Node(Empty, x, d, r, _) -> r
| Node(l, x, d, r, _) -> bal (remove_min_binding l) x d r
let merge t1 t2 =
match (t1, t2) with
(Empty, t) -> t
| (t, Empty) -> t
| (_, _) ->
let (x, d) = min_binding t2 in
bal t1 x d (remove_min_binding t2)
let rec remove x = function
Empty ->
Empty
| Node(l, v, d, r, h) ->
let c = Ord.compare x v in
if c = 0 then
merge l r
else if c < 0 then
bal (remove x l) v d r
else
bal l v d (remove x r)
let rec iter f = function
Empty -> ()
| Node(l, v, d, r, _) ->
iter f l; f v d; iter f r
let rec map f = function
Empty ->
Empty
| Node(l, v, d, r, h) ->
let l' = map f l in
let d' = f d in
let r' = map f r in
Node(l', v, d', r', h)
let rec mapi f = function
Empty ->
Empty
| Node(l, v, d, r, h) ->
let l' = mapi f l in
let d' = f v d in
let r' = mapi f r in
Node(l', v, d', r', h)
let rec fold f m accu =
match m with
Empty -> accu
| Node(l, v, d, r, _) ->
fold f r (f v d (fold f l accu))
let rec for_all p = function
Empty -> true
| Node(l, v, d, r, _) -> p v d && for_all p l && for_all p r
let rec exists p = function
Empty -> false
| Node(l, v, d, r, _) -> p v d || exists p l || exists p r
(* Beware: those two functions assume that the added k is *strictly*
smaller (or bigger) than all the present keys in the tree; it
does not test for equality with the current min (or max) key.
Indeed, they are only used during the "join" operation which
respects this precondition.
*)
let rec add_min_binding k v = function
| Empty -> singleton k v
| Node (l, x, d, r, h) ->
bal (add_min_binding k v l) x d r
let rec add_max_binding k v = function
| Empty -> singleton k v
| Node (l, x, d, r, h) ->
bal l x d (add_max_binding k v r)
(* Same as create and bal, but no assumptions are made on the
relative heights of l and r. *)
let rec join l v d r =
match (l, r) with
(Empty, _) -> add_min_binding v d r
| (_, Empty) -> add_max_binding v d l
| (Node(ll, lv, ld, lr, lh), Node(rl, rv, rd, rr, rh)) ->
if lh > rh + 2 then bal ll lv ld (join lr v d r) else
if rh > lh + 2 then bal (join l v d rl) rv rd rr else
create l v d r
(* Merge two trees l and r into one.
All elements of l must precede the elements of r.
No assumption on the heights of l and r. *)
let concat t1 t2 =
match (t1, t2) with
(Empty, t) -> t
| (t, Empty) -> t
| (_, _) ->
let (x, d) = min_binding t2 in
join t1 x d (remove_min_binding t2)
let concat_or_join t1 v d t2 =
match d with
| Some d -> join t1 v d t2
| None -> concat t1 t2
let rec split x = function
Empty ->
(Empty, None, Empty)
| Node(l, v, d, r, _) ->
let c = Ord.compare x v in
if c = 0 then (l, Some d, r)
else if c < 0 then
let (ll, pres, rl) = split x l in (ll, pres, join rl v d r)
else
let (lr, pres, rr) = split x r in (join l v d lr, pres, rr)
let rec merge f s1 s2 =
match (s1, s2) with
(Empty, Empty) -> Empty
| (Node (l1, v1, d1, r1, h1), _) when h1 >= height s2 ->
let (l2, d2, r2) = split v1 s2 in
concat_or_join (merge f l1 l2) v1 (f v1 (Some d1) d2) (merge f r1 r2)
| (_, Node (l2, v2, d2, r2, h2)) ->
let (l1, d1, r1) = split v2 s1 in
concat_or_join (merge f l1 l2) v2 (f v2 d1 (Some d2)) (merge f r1 r2)
| _ ->
assert false
let rec filter p = function
Empty -> Empty
| Node(l, v, d, r, _) ->
(* call [p] in the expected left-to-right order *)
let l' = filter p l in
let pvd = p v d in
let r' = filter p r in
if pvd then join l' v d r' else concat l' r'
let rec partition p = function
Empty -> (Empty, Empty)
| Node(l, v, d, r, _) ->
(* call [p] in the expected left-to-right order *)
let (lt, lf) = partition p l in
let pvd = p v d in
let (rt, rf) = partition p r in
if pvd
then (join lt v d rt, concat lf rf)
else (concat lt rt, join lf v d rf)
type 'a enumeration = End | More of key * 'a * 'a t * 'a enumeration
let rec cons_enum m e =
match m with
Empty -> e
| Node(l, v, d, r, _) -> cons_enum l (More(v, d, r, e))
let compare cmp m1 m2 =
let rec compare_aux e1 e2 =
match (e1, e2) with
(End, End) -> 0
| (End, _) -> -1
| (_, End) -> 1
| (More(v1, d1, r1, e1), More(v2, d2, r2, e2)) ->
let c = Ord.compare v1 v2 in
if c <> 0 then c else
let c = cmp d1 d2 in
if c <> 0 then c else
compare_aux (cons_enum r1 e1) (cons_enum r2 e2)
in compare_aux (cons_enum m1 End) (cons_enum m2 End)
let equal cmp m1 m2 =
let rec equal_aux e1 e2 =
match (e1, e2) with
(End, End) -> true
| (End, _) -> false
| (_, End) -> false
| (More(v1, d1, r1, e1), More(v2, d2, r2, e2)) ->
Ord.compare v1 v2 = 0 && cmp d1 d2 &&
equal_aux (cons_enum r1 e1) (cons_enum r2 e2)
in equal_aux (cons_enum m1 End) (cons_enum m2 End)
let rec cardinal = function
Empty -> 0
| Node(l, _, _, r, _) -> cardinal l + 1 + cardinal r
let rec bindings_aux accu = function
Empty -> accu
| Node(l, v, d, r, _) -> bindings_aux ((v, d) :: bindings_aux accu r) l
let bindings s =
bindings_aux [] s
let choose = min_binding
end

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(***********************************************************************)
(* *)
(* OCaml *)
(* *)
(* Xavier Leroy, projet Cristal, INRIA Rocquencourt *)
(* *)
(* Copyright 2000 Institut National de Recherche en Informatique et *)
(* en Automatique. All rights reserved. This file is distributed *)
(* under the terms of the Q Public License version 1.0. *)
(* *)
(***********************************************************************)
open Cmm
open Arch
open Reg
open Mach
(* Reloading for the AMD64 *)
(* Summary of instruction set constraints:
"S" means either stack or register, "R" means register only.
Operation Res Arg1 Arg2
Imove R S
or S R
Iconst_int S if 32-bit signed, R otherwise
Iconst_float R
Iconst_symbol (not PIC) S
Iconst_symbol (PIC) R
Icall_ind R
Itailcall_ind R
Iload R R R
Istore R R
Iintop(Icomp) R R S
or S S R
Iintop(Imul|Idiv|mod) R R S
Iintop(shift) S S R
Iintop(others) R R S
or S S R
Iintop_imm(Iadd, n)/lea R R
Iintop_imm(others) S S
Inegf...Idivf R R S
Ifloatofint R S
Iintoffloat R S
Ispecific(Ilea) R R R
Ispecific(Ifloatarithmem) R R R
Conditional branches:
Iinttest S R
or R S
Ifloattest R S (or S R if swapped test)
other tests S
*)
let stackp r =
match r.loc with
Stack _ -> true
| _ -> false
class reload = object (self)
inherit Reloadgen.reload_generic as super
method! reload_operation op arg res =
match op with
| Iintop(Iadd|Isub|Iand|Ior|Ixor|Icomp _|Icheckbound) ->
(* One of the two arguments can reside in the stack, but not both *)
if stackp arg.(0) && stackp arg.(1)
then ([|arg.(0); self#makereg arg.(1)|], res)
else (arg, res)
| Iintop_imm(Iadd, _) when arg.(0).loc <> res.(0).loc ->
(* This add will be turned into a lea; args and results must be
in registers *)
super#reload_operation op arg res
| Iintop(Idiv | Imod | Ilsl | Ilsr | Iasr)
| Iintop_imm(_, _) ->
(* The argument(s) and results can be either in register or on stack *)
(* Note: Idiv, Imod: arg(0) and res(0) already forced in regs
Ilsl, Ilsr, Iasr: arg(1) already forced in regs *)
(arg, res)
| Iintop(Imul) | Iaddf | Isubf | Imulf | Idivf ->
(* First argument (= result) must be in register, second arg
can reside in the stack *)
if stackp arg.(0)
then (let r = self#makereg arg.(0) in ([|r; arg.(1)|], [|r|]))
else (arg, res)
| Ifloatofint | Iintoffloat ->
(* Result must be in register, but argument can be on stack *)
(arg, (if stackp res.(0) then [| self#makereg res.(0) |] else res))
| Iconst_int n ->
if n <= 0x7FFFFFFFn && n >= -0x80000000n
then (arg, res)
else super#reload_operation op arg res
| Iconst_symbol _ ->
if !pic_code || !Clflags.dlcode
then super#reload_operation op arg res
else (arg, res)
| _ -> (* Other operations: all args and results in registers *)
super#reload_operation op arg res
method! reload_test tst arg =
match tst with
Iinttest cmp ->
(* One of the two arguments can reside on stack *)
if stackp arg.(0) && stackp arg.(1)
then [| self#makereg arg.(0); arg.(1) |]
else arg
| Ifloattest((Clt|Cle), _) ->
(* Cf. emit.mlp: we swap arguments in this case *)
(* First argument can be on stack, second must be in register *)
if stackp arg.(1)
then [| arg.(0); self#makereg arg.(1) |]
else arg
| Ifloattest((Ceq|Cne|Cgt|Cge), _) ->
(* Second argument can be on stack, first must be in register *)
if stackp arg.(0)
then [| self#makereg arg.(0); arg.(1) |]
else arg
| _ ->
(* The argument(s) can be either in register or on stack *)
arg
end
let fundecl f =
(new reload)#fundecl f

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(*
* Copyright (c) 2013 Jeremy Yallop.
*
* This file is distributed under the terms of the MIT License.
* See the file LICENSE for details.
*)
open PosixTypes
open Ctypes
open Foreign
type t = sigset_t ptr
let t = ptr sigset_t
(* This function initializes the signal set set to exclude all of the defined
signals. It always returns 0. *)
let sigemptyset = foreign "sigemptyset" (ptr sigset_t @-> returning int)
let empty () =
let setp = allocate_n ~count:1 sigset_t in begin
ignore (sigemptyset setp);
setp
end
(* This function initializes the signal set set to include all of the defined
signals. Again, the return value is 0. *)
let sigfillset = foreign "sigfillset" (ptr sigset_t @-> returning int)
let full () =
let setp = allocate_n ~count:1 sigset_t in begin
ignore (sigfillset setp);
setp
end
(* This function adds the signal signum to the signal set set. All sigaddset
does is modify set; it does not block or unblock any signals.
The return value is 0 on success and -1 on failure. The following errno
error condition is defined for this function:
EINVAL The signum argument doesn't specify a valid signal.
*)
let sigaddset = foreign "sigaddset" ~check_errno:true
(ptr sigset_t @-> int @-> returning int)
let add set signal = ignore (sigaddset set signal)
(* This function removes the signal signum from the signal set set. All
sigdelset does is modify set; it does not block or unblock any signals.
The return value and error conditions are the same as for
sigaddset. *)
let sigdelset = foreign "sigdelset" ~check_errno:true
(ptr sigset_t @-> int @-> returning int)
let del set signal = ignore (sigdelset set signal)
(* The sigismember function tests whether the signal signum is a member of the
signal set set. It returns 1 if the signal is in the set, 0 if not, and -1 if
there is an error.
The following errno error condition is defined for this function:
EINVAL The signum argument doesn't specify a valid signal.
*)
let sigismember = foreign "sigismember" ~check_errno:true
(ptr sigset_t @-> int @-> returning int)
let mem set signal = sigismember set signal <> 0

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(*---------------------------------------------------------------------------
Copyright 2012 Daniel C. Bünzli. All rights reserved.
Distributed under the BSD3 license, see license at the end of the file.
%%NAME%% release %%VERSION%%
---------------------------------------------------------------------------*)
let io_buffer_size = 65536 (* IO_BUFFER_SIZE 4.0.0 *)
let pp = Format.fprintf
let invalid_encode () = invalid_arg "expected `Await encode"
let invalid_bounds j l =
invalid_arg (Printf.sprintf "invalid bounds (index %d, length %d)" j l)
(* Unsafe string byte manipulations. If you don't believe the author's
invariants, replacing with safe versions makes everything safe in
the module. He won't be upset. *)
let unsafe_chr = Char.unsafe_chr
let unsafe_blit = String.unsafe_blit
let unsafe_array_get = Array.unsafe_get
let unsafe_byte s j = Char.code (String.unsafe_get s j)
let unsafe_set_byte s j byte = String.unsafe_set s j (Char.unsafe_chr byte)
(* Unicode characters *)
type uchar = int
let u_bom = 0xFEFF (* BOM. *)
let u_rep = 0xFFFD (* replacement character. *)
let is_uchar cp =
(0x0000 <= cp && cp <= 0xD7FF) || (0xE000 <= cp && cp <= 0x10FFFF)
let pp_cp ppf cp =
if cp < 0 || cp > 0x10FFFF then pp ppf "U+Invalid(%X)" cp else
if cp <= 0xFFFF then pp ppf "U+%04X" cp else
pp ppf "U+%X" cp
let cp_to_string cp = (* NOT thread safe. *)
pp Format.str_formatter "%a" pp_cp cp; Format.flush_str_formatter ()
(* Unicode encoding schemes *)
type encoding = [ `UTF_8 | `UTF_16 | `UTF_16BE | `UTF_16LE ]
type decoder_encoding = [ encoding | `US_ASCII | `ISO_8859_1 ]
let encoding_of_string s = match String.uppercase s with (* IANA names. *)
| "UTF-8" -> Some `UTF_8
| "UTF-16" -> Some `UTF_16
| "UTF-16LE" -> Some `UTF_16LE
| "UTF-16BE" -> Some `UTF_16BE
| "ANSI_X3.4-1968" | "ISO-IR-6" | "ANSI_X3.4-1986" | "ISO_646.IRV:1991"
| "ASCII" | "ISO646-US" | "US-ASCII" | "US" | "IBM367" | "CP367" | "CSASCII" ->
Some `US_ASCII
| "ISO_8859-1:1987" | "ISO-IR-100" | "ISO_8859-1" | "ISO-8859-1"
| "LATIN1" | "L1" | "IBM819" | "CP819" | "CSISOLATIN1" ->
Some `ISO_8859_1
| _ -> None
let encoding_to_string = function
| `UTF_8 -> "UTF-8" | `UTF_16 -> "UTF-16" | `UTF_16BE -> "UTF-16BE"
| `UTF_16LE -> "UTF-16LE" | `US_ASCII -> "US-ASCII"
| `ISO_8859_1 -> "ISO-8859-1"
(* Base character decoders. They assume enough data. *)
let malformed s j l = `Malformed (String.sub s j l)
let malformed_pair be hi s j l = (* missing or half low surrogate at eoi. *)
let bs1 = String.sub s j l in
let bs0 = String.create 2 in
let j0, j1 = if be then (0, 1) else (1, 0) in
unsafe_set_byte bs0 j0 (hi lsr 8);
unsafe_set_byte bs0 j1 (hi land 0xFF);
`Malformed (bs0 ^ bs1)
let r_us_ascii s j =
(* assert (0 <= j && j < String.length s); *)
let b0 = unsafe_byte s j in
if b0 <= 127 then `Uchar b0 else malformed s j 1
let r_iso_8859_1 s j =
(* assert (0 <= j && j < String.length s); *)
`Uchar (unsafe_byte s j)
let utf_8_len = [| (* uchar byte length according to first UTF-8 byte. *)
1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1;
1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1;
1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1;
1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1;
1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1; 1;
1; 1; 1; 1; 1; 1; 1; 1; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0;
0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0;
0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0;
0; 0; 2; 2; 2; 2; 2; 2; 2; 2; 2; 2; 2; 2; 2; 2; 2; 2; 2; 2; 2; 2; 2; 2;
2; 2; 2; 2; 2; 2; 2; 2; 3; 3; 3; 3; 3; 3; 3; 3; 3; 3; 3; 3; 3; 3; 3; 3;
4; 4; 4; 4; 4; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0 |]
let r_utf_8 s j l =
(* assert (0 <= j && 0 <= l && j + l <= String.length s); *)
match l with
| 1 -> `Uchar (unsafe_byte s j)
| 2 ->
let b0 = unsafe_byte s j in let b1 = unsafe_byte s (j + 1) in
if b1 lsr 6 != 0b10 then malformed s j l else
`Uchar (((b0 land 0x1F) lsl 6) lor (b1 land 0x3F))
| 3 ->
let b0 = unsafe_byte s j in let b1 = unsafe_byte s (j + 1) in
let b2 = unsafe_byte s (j + 2) in
let c = `Uchar (((b0 land 0x0F) lsl 12) lor
((b1 land 0x3F) lsl 6) lor
(b2 land 0x3F))
in
if b2 lsr 6 != 0b10 then malformed s j l else
begin match b0 with
| 0xE0 -> if b1 < 0xA0 || 0xBF < b1 then malformed s j l else c
| 0xED -> if b1 < 0x80 || 0x9F < b1 then malformed s j l else c
| _ -> if b1 lsr 6 != 0b10 then malformed s j l else c
end
| 4 ->
let b0 = unsafe_byte s j in let b1 = unsafe_byte s (j + 1) in
let b2 = unsafe_byte s (j + 2) in let b3 = unsafe_byte s (j + 3) in
let c = `Uchar (((b0 land 0x07) lsl 18) lor
((b1 land 0x3F) lsl 12) lor
((b2 land 0x3F) lsl 6) lor
(b3 land 0x3F))
in
if b3 lsr 6 != 0b10 || b2 lsr 6 != 0b10 then malformed s j l else
begin match b0 with
| 0xF0 -> if b1 < 0x90 || 0xBF < b1 then malformed s j l else c
| 0xF4 -> if b1 < 0x80 || 0x8F < b1 then malformed s j l else c
| _ -> if b1 lsr 6 != 0b10 then malformed s j l else c
end
| _ -> assert false
let r_utf_16 s j0 j1 = (* May return a high surrogate. *)
(* assert (0 <= j0 && 0 <= j1 && max j0 j1 < String.length s); *)
let b0 = unsafe_byte s j0 in let b1 = unsafe_byte s j1 in
let u = (b0 lsl 8) lor b1 in
if u < 0xD800 || u > 0xDFFF then `Uchar u else
if u > 0xDBFF then malformed s (min j0 j1) 2 else `Hi u
let r_utf_16_lo hi s j0 j1 = (* Combines [hi] with a low surrogate. *)
(* assert (0 <= j0 && 0 <= j1 && max j0 j1 < String.length s); *)
let b0 = unsafe_byte s j0 in
let b1 = unsafe_byte s j1 in
let lo = (b0 lsl 8) lor b1 in
if lo < 0xDC00 || lo > 0xDFFF
then malformed_pair (j0 < j1 (* true => be *)) hi s (min j0 j1) 2
else `Uchar ((((hi land 0x3FF) lsl 10) lor (lo land 0x3FF)) + 0x10000)
let r_encoding s j l = (* guess encoding with max. 3 bytes. *)
(* assert (0 <= j && 0 <= l && j + l <= String.length s) *)
let some i = if i < l then Some (unsafe_byte s (j + i)) else None in
match (some 0), (some 1), (some 2) with
| Some 0xEF, Some 0xBB, Some 0xBF -> `UTF_8 `BOM
| Some 0xFE, Some 0xFF, _ -> `UTF_16BE `BOM
| Some 0xFF, Some 0xFE, _ -> `UTF_16LE `BOM
| Some 0x00, Some p, _ when p > 0 -> `UTF_16BE (`ASCII p)
| Some p, Some 0x00, _ when p > 0 -> `UTF_16LE (`ASCII p)
| Some u, _, _ when utf_8_len.(u) <> 0 -> `UTF_8 `Decode
| Some _, Some _, _ -> `UTF_16BE `Decode
| Some _, None , None -> `UTF_8 `Decode
| None , None , None -> `UTF_8 `End
| None , Some _, _ -> assert false
| Some _, None , Some _ -> assert false
| None , None , Some _ -> assert false
(* Decode *)
type src = [ `Channel of in_channel | `String of string | `Manual ]
type nln = [ `ASCII of uchar | `NLF of uchar | `Readline of uchar ]
type decode = [ `Await | `End | `Malformed of string | `Uchar of uchar]
let pp_decode ppf = function
| `Uchar u -> pp ppf "@[`Uchar %a@]" pp_cp u
| `End -> pp ppf "`End"
| `Await -> pp ppf "`Await"
| `Malformed bs ->
let l = String.length bs in
pp ppf "@[`Malformed (";
if l > 0 then pp ppf "%02X" (Char.code (bs.[0]));
for i = 1 to l - 1 do pp ppf " %02X" (Char.code (bs.[i])) done;
pp ppf ")@]"
type decoder =
{ src : src; (* input source. *)
mutable encoding : decoder_encoding; (* decoded encoding. *)
nln : nln option; (* newline normalization (if any). *)
nl : int; (* newline normalization character. *)
mutable i : string; (* current input chunk. *)
mutable i_pos : int; (* input current position. *)
mutable i_max : int; (* input maximal position. *)
t : string; (* four bytes temporary buffer for overlapping reads. *)
mutable t_len : int; (* current byte length of [t]. *)
mutable t_need : int; (* number of bytes needed in [t]. *)
mutable removed_bom : bool; (* [true] if an initial BOM was removed. *)
mutable last_cr : bool; (* [true] if last char was CR. *)
mutable line : int; (* line number. *)
mutable col : int; (* column number. *)
mutable byte_count : int; (* byte count. *)
mutable count : int; (* char count. *)
mutable pp : (* decoder post-processor for BOM, position and nln. *)
decoder -> [ `Malformed of string | `Uchar of uchar ] -> decode;
mutable k : decoder -> decode } (* decoder continuation. *)
(* On decodes that overlap two (or more) [d.i] buffers, we use [t_fill] to copy
the input data to [d.t] and decode from there. If the [d.i] buffers are not
too small this is faster than continuation based byte per byte writes.
End of input (eoi) is signalled by [d.i_pos = 0] and [d.i_max = min_int]
which implies that [i_rem d < 0] is [true]. *)
let i_rem d = d.i_max - d.i_pos + 1 (* remaining bytes to read in [d.i]. *)
let eoi d = d.i <- ""; d.i_pos <- 0; d.i_max <- min_int (* set eoi in [d]. *)
let src d s j l = (* set [d.i] with [s]. *)
if (j < 0 || l < 0 || j + l > String.length s) then invalid_bounds j l else
if (l = 0) then eoi d else
(d.i <- s; d.i_pos <- j; d.i_max <- j + l - 1)
let refill k d = match d.src with (* get new input in [d.i] and [k]ontinue. *)
| `Manual -> d.k <- k; `Await
| `String _ -> eoi d; k d
| `Channel ic ->
let rc = input ic d.i 0 (String.length d.i) in
(src d d.i 0 rc; k d)
let t_need d need = d.t_len <- 0; d.t_need <- need
let rec t_fill k d = (* get [d.t_need] bytes (or less if eoi) in [i.t]. *)
let blit d l =
unsafe_blit d.i d.i_pos d.t d.t_len (* write pos. *) l;
d.i_pos <- d.i_pos + l; d.t_len <- d.t_len + l;
in
let rem = i_rem d in
if rem < 0 (* eoi *) then k d else
let need = d.t_need - d.t_len in
if rem < need then (blit d rem; refill (t_fill k) d) else (blit d need; k d)
let ret k v byte_count d = (* return post-processed [v]. *)
d.k <- k; d.byte_count <- d.byte_count + byte_count; d.pp d v
(* Decoders. *)
let rec decode_us_ascii d =
let rem = i_rem d in
if rem <= 0 then (if rem < 0 then `End else refill decode_us_ascii d) else
let j = d.i_pos in
d.i_pos <- d.i_pos + 1; ret decode_us_ascii (r_us_ascii d.i j) 1 d
let rec decode_iso_8859_1 d =
let rem = i_rem d in
if rem <= 0 then (if rem < 0 then `End else refill decode_iso_8859_1 d) else
let j = d.i_pos in
d.i_pos <- d.i_pos + 1; ret decode_iso_8859_1 (r_iso_8859_1 d.i j) 1 d
(* UTF-8 decoder *)
let rec t_decode_utf_8 d = (* decode from [d.t]. *)
if d.t_len < d.t_need
then ret decode_utf_8 (malformed d.t 0 d.t_len) d.t_len d
else ret decode_utf_8 (r_utf_8 d.t 0 d.t_len) d.t_len d
and decode_utf_8 d =
let rem = i_rem d in
if rem <= 0 then (if rem < 0 then `End else refill decode_utf_8 d) else
let need = unsafe_array_get utf_8_len (unsafe_byte d.i d.i_pos) in
if rem < need then (t_need d need; t_fill t_decode_utf_8 d) else
let j = d.i_pos in
if need = 0
then (d.i_pos <- d.i_pos + 1; ret decode_utf_8 (malformed d.i j 1) 1 d)
else (d.i_pos <- d.i_pos + need; ret decode_utf_8 (r_utf_8 d.i j need) need d)
(* UTF-16BE decoder *)
let rec t_decode_utf_16be_lo hi d = (* decode from [d.t]. *)
let bcount = d.t_len + 2 (* hi count *) in
if d.t_len < d.t_need
then ret decode_utf_16be (malformed_pair true hi d.t 0 d.t_len) bcount d
else ret decode_utf_16be (r_utf_16_lo hi d.t 0 1) bcount d
and t_decode_utf_16be d = (* decode from [d.t]. *)
if d.t_len < d.t_need
then ret decode_utf_16be (malformed d.t 0 d.t_len) d.t_len d
else decode_utf_16be_lo (r_utf_16 d.t 0 1) d
and decode_utf_16be_lo v d = match v with
| `Uchar _ | `Malformed _ as v -> ret decode_utf_16be v 2 d
| `Hi hi ->
let rem = i_rem d in
if rem < 2 then (t_need d 2; t_fill (t_decode_utf_16be_lo hi) d) else
let j = d.i_pos in
d.i_pos <- d.i_pos + 2;
ret decode_utf_16be (r_utf_16_lo hi d.i j (j + 1)) 4 d
and decode_utf_16be d =
let rem = i_rem d in
if rem <= 0 then (if rem < 0 then `End else refill decode_utf_16be d) else
if rem < 2 then (t_need d 2; t_fill t_decode_utf_16be d) else
let j = d.i_pos in
d.i_pos <- d.i_pos + 2; decode_utf_16be_lo (r_utf_16 d.i j (j + 1)) d
(* UTF-16LE decoder, same as UTF-16BE with byte swapped. *)
let rec t_decode_utf_16le_lo hi d = (* decode from [d.t]. *)
let bcount = d.t_len + 2 (* hi count *) in
if d.t_len < d.t_need
then ret decode_utf_16le (malformed_pair false hi d.t 0 d.t_len) bcount d
else ret decode_utf_16le (r_utf_16_lo hi d.t 1 0) bcount d
and t_decode_utf_16le d = (* decode from [d.t]. *)
if d.t_len < d.t_need
then ret decode_utf_16le (malformed d.t 0 d.t_len) d.t_len d
else decode_utf_16le_lo (r_utf_16 d.t 1 0) d
and decode_utf_16le_lo v d = match v with
| `Uchar _ | `Malformed _ as v -> ret decode_utf_16le v 2 d
| `Hi hi ->
let rem = i_rem d in
if rem < 2 then (t_need d 2; t_fill (t_decode_utf_16le_lo hi) d) else
let j = d.i_pos in
d.i_pos <- d.i_pos + 2;
ret decode_utf_16le (r_utf_16_lo hi d.i (j + 1) j) 4 d
and decode_utf_16le d =
let rem = i_rem d in
if rem <= 0 then (if rem < 0 then `End else refill decode_utf_16le d) else
if rem < 2 then (t_need d 2; t_fill t_decode_utf_16le d) else
let j = d.i_pos in
d.i_pos <- d.i_pos + 2; decode_utf_16le_lo (r_utf_16 d.i (j + 1) j) d
(* Encoding guessing. The guess is simple but starting the decoder
after is tedious, uutf's decoders are not designed to put bytes
back in the stream. *)
let guessed_utf_8 d = (* start decoder after `UTF_8 guess. *)
let b3 d = (* handles the third read byte. *)
let b3 = unsafe_byte d.t 2 in
match utf_8_len.(b3) with
| 0 -> ret decode_utf_8 (malformed d.t 2 1) 1 d
| n ->
d.t_need <- n; d.t_len <- 1; unsafe_set_byte d.t 0 b3;
t_fill t_decode_utf_8 d
in
let b2 d = (* handle second read byte. *)
let b2 = unsafe_byte d.t 1 in
let b3 = if d.t_len > 2 then b3 else decode_utf_8 (* decodes `End *) in
match utf_8_len.(b2) with
| 0 -> ret b3 (malformed d.t 1 1) 1 d
| 1 -> ret b3 (r_utf_8 d.t 1 1) 1 d
| n -> (* copy d.t.(1-2) to d.t.(0-1) and decode *)
d.t_need <- n;
unsafe_set_byte d.t 0 b2;
if (d.t_len < 3) then d.t_len <- 1 else
(d.t_len <- 2; unsafe_set_byte d.t 1 (unsafe_byte d.t 2); );
t_fill t_decode_utf_8 d
in
let b1 = unsafe_byte d.t 0 in (* handle first read byte. *)
let b2 = if d.t_len > 1 then b2 else decode_utf_8 (* decodes `End *) in
match utf_8_len.(b1) with
| 0 -> ret b2 (malformed d.t 0 1) 1 d
| 1 -> ret b2 (r_utf_8 d.t 0 1) 1 d
| 2 ->
if d.t_len < 2 then ret decode_utf_8 (malformed d.t 0 1) 1 d else
if d.t_len < 3 then ret decode_utf_8 (r_utf_8 d.t 0 2) 2 d else
ret b3 (r_utf_8 d.t 0 2) 2 d
| 3 ->
if d.t_len < 3
then ret decode_utf_8 (malformed d.t 0 d.t_len) d.t_len d
else ret decode_utf_8 (r_utf_8 d.t 0 3) 3 d
| 4 ->
if d.t_len < 3
then ret decode_utf_8 (malformed d.t 0 d.t_len) d.t_len d
else (d.t_need <- 4; t_fill t_decode_utf_8 d)
| n -> assert false
let guessed_utf_16 d be v = (* start decoder after `UTF_16{BE,LE} guess. *)
let decode_utf_16, t_decode_utf_16, t_decode_utf_16_lo, j0, j1 =
if be then decode_utf_16be, t_decode_utf_16be, t_decode_utf_16be_lo, 0, 1
else decode_utf_16le, t_decode_utf_16le, t_decode_utf_16le_lo, 1, 0
in
let b3 k d =
if d.t_len < 3 then decode_utf_16 d (* decodes `End *) else
begin (* copy d.t.(2) to d.t.(0) and decode. *)
d.t_need <- 2; d.t_len <- 1;
unsafe_set_byte d.t 0 (unsafe_byte d.t 2);
t_fill k d
end
in
match v with
| `BOM -> ret (b3 t_decode_utf_16) (`Uchar u_bom) 2 d
| `ASCII u -> ret (b3 t_decode_utf_16) (`Uchar u) 2 d
| `Decode ->
match r_utf_16 d.t j0 j1 with
| `Malformed _ | `Uchar _ as v -> ret (b3 t_decode_utf_16) v 2 d
| `Hi hi ->
if d.t_len < 3
then ret decode_utf_16 (malformed_pair be hi "" 0 0) d.t_len d
else (b3 (t_decode_utf_16_lo hi)) d
let guess_encoding d = (* guess encoding and start decoder. *)
let setup d = match r_encoding d.t 0 d.t_len with
| `UTF_8 r ->
d.encoding <- `UTF_8; d.k <- decode_utf_8;
begin match r with
| `BOM -> ret decode_utf_8 (`Uchar u_bom) 3 d
| `Decode -> guessed_utf_8 d
| `End -> `End
end
| `UTF_16BE r ->
d.encoding <- `UTF_16BE; d.k <- decode_utf_16be; guessed_utf_16 d true r
| `UTF_16LE r ->
d.encoding <- `UTF_16LE; d.k <- decode_utf_16le; guessed_utf_16 d false r
in
(t_need d 3; t_fill setup d)
(* Character post-processors. Used for BOM handling, newline
normalization and position tracking. The [pp_remove_bom] is only
used for the first character to remove a possible initial BOM and
handle UTF-16 endianness recognition. *)
let nline d = d.col <- 0; d.line <- d.line + 1 (* inlined. *)
let ncol d = d.col <- d.col + 1 (* inlined. *)
let ncount d = d.count <- d.count + 1 (* inlined. *)
let cr d b = d.last_cr <- b (* inlined. *)
let pp_remove_bom utf16 pp d = function(* removes init. BOM, handles UTF-16. *)
| `Uchar 0xFEFF (* BOM *) ->
if utf16 then (d.encoding <- `UTF_16BE; d.k <- decode_utf_16be);
d.removed_bom <- true; d.pp <- pp; d.k d
| `Uchar 0xFFFE (* BOM reversed from decode_utf_16be *) when utf16 ->
d.encoding <- `UTF_16LE; d.k <- decode_utf_16le;
d.removed_bom <- true; d.pp <- pp; d.k d
| `Malformed _ | `Uchar _ as v ->
d.removed_bom <- false; d.pp <- pp; d.pp d v
let pp_nln_none d = function
| `Uchar 0x000A (* LF *) as v ->
let last_cr = d.last_cr in
cr d false; ncount d; if last_cr then v else (nline d; v)
| `Uchar 0x000D (* CR *) as v -> cr d true; ncount d; nline d; v
| `Uchar (0x0085 | 0x000C | 0x2028 | 0x2029) (* NEL | FF | LS | PS *) as v ->
cr d false; ncount d; nline d; v
| `Uchar _ | `Malformed _ as v -> cr d false; ncount d; ncol d; v
let pp_nln_readline d = function
| `Uchar 0x000A (* LF *) ->
let last_cr = d.last_cr in
cr d false; if last_cr then d.k d else (ncount d; nline d; `Uchar d.nl)
| `Uchar 0x000D (* CR *) -> cr d true; ncount d; nline d; `Uchar d.nl
| `Uchar (0x0085 | 0x000C | 0x2028 | 0x2029) (* NEL | FF | LS | PS *) ->
cr d false; ncount d; nline d; `Uchar d.nl
| `Uchar _ | `Malformed _ as v -> cr d false; ncount d; ncol d; v
let pp_nln_nlf d = function
| `Uchar 0x000A (* LF *) ->
let last_cr = d.last_cr in
cr d false; if last_cr then d.k d else (ncount d; nline d; `Uchar d.nl)
| `Uchar 0x000D (* CR *) -> cr d true; ncount d; nline d; `Uchar d.nl
| `Uchar 0x0085 (* NEL *) -> cr d false; ncount d; nline d; `Uchar d.nl
| `Uchar (0x000C | 0x2028 | 0x2029) as v (* FF | LS | PS *) ->
cr d false; ncount d; nline d; v
| `Uchar _ | `Malformed _ as v -> cr d false; ncount d; ncol d; v
let pp_nln_ascii d = function
| `Uchar 0x000A (* LF *) ->
let last_cr = d.last_cr in
cr d false; if last_cr then d.k d else (ncount d; nline d; `Uchar d.nl)
| `Uchar 0x000D (* CR *) -> cr d true; ncount d; nline d; `Uchar d.nl
| `Uchar (0x0085 | 0x000C | 0x2028 | 0x2029) as v (* NEL | FF | LS | PS *) ->
cr d false; ncount d; nline d; v
| `Uchar _ | `Malformed _ as v -> cr d false; ncount d; ncol d; v
let decode_fun = function
| `UTF_8 -> decode_utf_8
| `UTF_16 -> decode_utf_16be (* see [pp_remove_bom]. *)
| `UTF_16BE -> decode_utf_16be
| `UTF_16LE -> decode_utf_16le
| `US_ASCII -> decode_us_ascii
| `ISO_8859_1 -> decode_iso_8859_1
let decoder ?nln ?encoding src =
let pp, nl = match nln with
| None -> pp_nln_none, 0x000A (* not used. *)
| Some (`ASCII nl) -> pp_nln_ascii, nl
| Some (`NLF nl) -> pp_nln_nlf, nl
| Some (`Readline nl) -> pp_nln_readline, nl
in
let encoding, k = match encoding with
| None -> `UTF_8, guess_encoding
| Some e -> (e :> decoder_encoding), decode_fun e
in
let i, i_pos, i_max = match src with
| `Manual -> "", 1, 0 (* implies src_rem d = 0. *)
| `Channel _ -> String.create io_buffer_size, 1, 0 (* idem. *)
| `String s -> s, 0, String.length s - 1
in
{ src = (src :> src); encoding; nln = (nln :> nln option); nl;
i; i_pos; i_max; t = String.create 4; t_len = 0; t_need = 0;
removed_bom = false; last_cr = false; line = 1; col = 0;
byte_count = 0; count = 0;
pp = pp_remove_bom (encoding = `UTF_16) pp; k }
let decode d = d.k d
let decoder_line d = d.line
let decoder_col d = d.col
let decoder_byte_count d = d.byte_count
let decoder_count d = d.count
let decoder_removed_bom d = d.removed_bom
let decoder_src d = d.src
let decoder_nln d = d.nln
let decoder_encoding d = d.encoding
let set_decoder_encoding d e =
d.encoding <- (e :> decoder_encoding); d.k <- decode_fun e
(* Encode *)
type dst = [ `Channel of out_channel | `Buffer of Buffer.t | `Manual ]
type encode = [ `Await | `End | `Uchar of uchar ]
type encoder =
{ dst : dst; (* output destination. *)
encoding : encoding; (* encoded encoding. *)
mutable o : string; (* current output chunk. *)
mutable o_pos : int; (* next output position to write. *)
mutable o_max : int; (* maximal output position to write. *)
t : string; (* four bytes buffer for overlapping writes. *)
mutable t_pos : int; (* next position to read in [t]. *)
mutable t_max : int; (* maximal position to read in [t]. *)
mutable k : (* encoder continuation. *)
encoder -> encode -> [ `Ok | `Partial ] }
(* On encodes that overlap two (or more) [e.o] buffers, we encode the
character to the temporary buffer [o.t] and continue with
[tmp_flush] to write this data on the different [e.o] buffers. If
the [e.o] buffers are not too small this is faster than
continuation based byte per byte writes. *)
let o_rem e = e.o_max - e.o_pos + 1 (* remaining bytes to write in [e.o]. *)
let dst e s j l = (* set [e.o] with [s]. *)
if (j < 0 || l < 0 || j + l > String.length s) then invalid_bounds j l;
e.o <- s; e.o_pos <- j; e.o_max <- j + l - 1
let partial k e = function `Await -> k e | `Uchar _ | `End -> invalid_encode ()
let flush k e = match e.dst with(* get free storage in [d.o] and [k]ontinue. *)
| `Manual -> e.k <- partial k; `Partial
| `Buffer b -> Buffer.add_substring b e.o 0 e.o_pos; e.o_pos <- 0; k e
| `Channel oc -> output oc e.o 0 e.o_pos; e.o_pos <- 0; k e
let t_range e max = e.t_pos <- 0; e.t_max <- max
let rec t_flush k e = (* flush [d.t] up to [d.t_max] in [d.i]. *)
let blit e l =
unsafe_blit e.t e.t_pos e.o e.o_pos l;
e.o_pos <- e.o_pos + l; e.t_pos <- e.t_pos + l
in
let rem = o_rem e in
let len = e.t_max - e.t_pos + 1 in
if rem < len then (blit e rem; flush (t_flush k) e) else (blit e len; k e)
(* Encoders. *)
let rec encode_utf_8 e v =
let k e = e.k <- encode_utf_8; `Ok in
match v with
| `Await -> k e
| `End -> flush k e
| `Uchar u as v ->
let rem = o_rem e in
if u <= 0x007F then
if rem < 1 then flush (fun e -> encode_utf_8 e v) e else
(unsafe_set_byte e.o e.o_pos u; e.o_pos <- e.o_pos + 1; k e)
else if u <= 0x07FF then
begin
let s, j, k =
if rem < 2 then (t_range e 1; e.t, 0, t_flush k) else
let j = e.o_pos in (e.o_pos <- e.o_pos + 2; e.o, j, k)
in
unsafe_set_byte s j (0xC0 lor (u lsr 6));
unsafe_set_byte s (j + 1) (0x80 lor (u land 0x3F));
k e
end
else if u <= 0xFFFF then
begin
let s, j, k =
if rem < 3 then (t_range e 2; e.t, 0, t_flush k) else
let j = e.o_pos in (e.o_pos <- e.o_pos + 3; e.o, j, k)
in
unsafe_set_byte s j (0xE0 lor (u lsr 12));
unsafe_set_byte s (j + 1) (0x80 lor ((u lsr 6) land 0x3F));
unsafe_set_byte s (j + 2) (0x80 lor (u land 0x3F));
k e
end
else
begin
let s, j, k =
if rem < 4 then (t_range e 3; e.t, 0, t_flush k) else
let j = e.o_pos in (e.o_pos <- e.o_pos + 4; e.o, j, k)
in
unsafe_set_byte s j (0xF0 lor (u lsr 18));
unsafe_set_byte s (j + 1) (0x80 lor ((u lsr 12) land 0x3F));
unsafe_set_byte s (j + 2) (0x80 lor ((u lsr 6) land 0x3F));
unsafe_set_byte s (j + 3) (0x80 lor (u land 0x3F));
k e
end
let rec encode_utf_16be e v =
let k e = e.k <- encode_utf_16be; `Ok in
match v with
| `Await -> k e
| `End -> flush k e
| `Uchar u ->
let rem = o_rem e in
if u < 0x10000 then
begin
let s, j, k =
if rem < 2 then (t_range e 1; e.t, 0, t_flush k) else
let j = e.o_pos in (e.o_pos <- e.o_pos + 2; e.o, j, k)
in
unsafe_set_byte s j (u lsr 8);
unsafe_set_byte s (j + 1) (u land 0xFF);
k e
end else begin
let s, j, k =
if rem < 4 then (t_range e 3; e.t, 0, t_flush k) else
let j = e.o_pos in (e.o_pos <- e.o_pos + 4; e.o, j, k)
in
let u' = u - 0x10000 in
let hi = (0xD800 lor (u' lsr 10)) in
let lo = (0xDC00 lor (u' land 0x3FF)) in
unsafe_set_byte s j (hi lsr 8);
unsafe_set_byte s (j + 1) (hi land 0xFF);
unsafe_set_byte s (j + 2) (lo lsr 8);
unsafe_set_byte s (j + 3) (lo land 0xFF);
k e
end
let rec encode_utf_16le e v = (* encode_uft_16be with bytes swapped. *)
let k e = e.k <- encode_utf_16le; `Ok in
match v with
| `Await -> k e
| `End -> flush k e
| `Uchar u ->
let rem = o_rem e in
if u < 0x10000 then
begin
let s, j, k =
if rem < 2 then (t_range e 1; e.t, 0, t_flush k) else
let j = e.o_pos in (e.o_pos <- e.o_pos + 2; e.o, j, k)
in
unsafe_set_byte s j (u land 0xFF);
unsafe_set_byte s (j + 1) (u lsr 8);
k e
end
else
begin
let s, j, k =
if rem < 4 then (t_range e 3; e.t, 0, t_flush k) else
let j = e.o_pos in (e.o_pos <- e.o_pos + 4; e.o, j, k)
in
let u' = u - 0x10000 in
let hi = (0xD800 lor (u' lsr 10)) in
let lo = (0xDC00 lor (u' land 0x3FF)) in
unsafe_set_byte s j (hi land 0xFF);
unsafe_set_byte s (j + 1) (hi lsr 8);
unsafe_set_byte s (j + 2) (lo land 0xFF);
unsafe_set_byte s (j + 3) (lo lsr 8);
k e
end
let encode_fun = function
| `UTF_8 -> encode_utf_8
| `UTF_16 -> encode_utf_16be
| `UTF_16BE -> encode_utf_16be
| `UTF_16LE -> encode_utf_16le
let encoder encoding dst =
let o, o_pos, o_max = match dst with
| `Manual -> "", 1, 0 (* implies o_rem e = 0. *)
| `Buffer _
| `Channel _ -> String.create io_buffer_size, 0, io_buffer_size - 1
in
{ dst = (dst :> dst); encoding = (encoding :> encoding); o; o_pos; o_max;
t = String.create 4; t_pos = 1; t_max = 0; k = encode_fun encoding}
let encode e v = e.k e (v :> encode)
let encoder_encoding e = e.encoding
let encoder_dst e = e.dst
(* Manual sources and destinations. *)
module Manual = struct
let src = src
let dst = dst
let dst_rem = o_rem
end
(* Strings folders and Buffer encoders *)
module String = struct
let encoding_guess s = match r_encoding s 0 (max (String.length s) 3) with
| `UTF_8 d -> `UTF_8, (d = `BOM)
| `UTF_16BE d -> `UTF_16BE, (d = `BOM)
| `UTF_16LE d -> `UTF_16LE, (d = `BOM)
type 'a folder =
'a -> int -> [ `Uchar of uchar | `Malformed of string ] -> 'a
let fold_utf_8 f acc s =
let rec loop acc f s i l =
if i = l then acc else
let need = unsafe_array_get utf_8_len (unsafe_byte s i) in
if need = 0 then loop (f acc i (malformed s i 1)) f s (i + 1) l else
let rem = l - i in
if rem < need then f acc i (malformed s i rem) else
loop (f acc i (r_utf_8 s i need)) f s (i + need) l
in
loop acc f s 0 (String.length s)
let fold_utf_16be f acc s =
let rec loop acc f s i l =
if i = l then acc else
let rem = l - i in
if rem < 2 then f acc i (malformed s i 1) else
match r_utf_16 s i (i + 1) with
| `Uchar _ | `Malformed _ as v -> loop (f acc i v) f s (i + 2) l
| `Hi hi ->
if rem < 4 then f acc i (malformed s i rem) else
loop (f acc i (r_utf_16_lo hi s (i + 2) (i + 3))) f s (i + 4) l
in
loop acc f s 0 (String.length s)
let fold_utf_16le f acc s = (* [fold_utf_16be], bytes swapped. *)
let rec loop acc f s i l =
if i = l then acc else
let rem = l - i in
if rem < 2 then f acc i (malformed s i 1) else
match r_utf_16 s (i + 1) i with
| `Uchar _ | `Malformed _ as v -> loop (f acc i v) f s (i + 2) l
| `Hi hi ->
if rem < 4 then f acc i (malformed s i rem) else
loop (f acc i (r_utf_16_lo hi s (i + 3) (i + 2))) f s (i + 4) l
in
loop acc f s 0 (String.length s)
end
module Buffer = struct
let add_utf_8 b u =
let w byte = Buffer.add_char b (unsafe_chr byte) in (* inlined. *)
if u <= 0x007F then
(w u)
else if u <= 0x07FF then
(w (0xC0 lor (u lsr 6));
w (0x80 lor (u land 0x3F)))
else if u <= 0xFFFF then
(w (0xE0 lor (u lsr 12));
w (0x80 lor ((u lsr 6) land 0x3F));
w (0x80 lor (u land 0x3F)))
else
(w (0xF0 lor (u lsr 18));
w (0x80 lor ((u lsr 12) land 0x3F));
w (0x80 lor ((u lsr 6) land 0x3F));
w (0x80 lor (u land 0x3F)))
let add_utf_16be b u =
let w byte = Buffer.add_char b (unsafe_chr byte) in (* inlined. *)
if u < 0x10000 then (w (u lsr 8); w (u land 0xFF)) else
let u' = u - 0x10000 in
let hi = (0xD800 lor (u' lsr 10)) in
let lo = (0xDC00 lor (u' land 0x3FF)) in
w (hi lsr 8); w (hi land 0xFF);
w (lo lsr 8); w (lo land 0xFF)
let add_utf_16le b u = (* swapped add_utf_16be. *)
let w byte = Buffer.add_char b (unsafe_chr byte) in (* inlined. *)
if u < 0x10000 then (w (u land 0xFF); w (u lsr 8)) else
let u' = u - 0x10000 in
let hi = (0xD800 lor (u' lsr 10)) in
let lo = (0xDC00 lor (u' land 0x3FF)) in
w (hi land 0xFF); w (hi lsr 8);
w (lo land 0xFF); w (lo lsr 8)
end
(*---------------------------------------------------------------------------
Copyright 2012 Daniel C. Bünzli
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials provided
with the distribution.
3. Neither the name of Daniel C. Bünzli nor the names of
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
---------------------------------------------------------------------------*)