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
|
(**************************************************************************)
(* *)
(* 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 Lesser General Public License version 2.1, with the *)
(* special exception on linking described in the file LICENSE. *)
(* *)
(**************************************************************************)
(* Character operations *)
external code: char -> int = "%identity"
external unsafe_chr: int -> char = "%identity"
let chr n =
if n < 0 || n > 255 then invalid_arg "Char.chr" else unsafe_chr n
external bytes_create: int -> bytes = "caml_create_bytes"
external bytes_unsafe_set : bytes -> int -> char -> unit
= "%bytes_unsafe_set"
external unsafe_to_string : bytes -> string = "%bytes_to_string"
let escaped = function
| '\'' -> "\\'"
| '\\' -> "\\\\"
| '\n' -> "\\n"
| '\t' -> "\\t"
| '\r' -> "\\r"
| '\b' -> "\\b"
| ' ' .. '~' as c ->
let s = bytes_create 1 in
bytes_unsafe_set s 0 c;
unsafe_to_string s
| c ->
let n = code c in
let s = bytes_create 4 in
bytes_unsafe_set s 0 '\\';
bytes_unsafe_set s 1 (unsafe_chr (48 + n / 100));
bytes_unsafe_set s 2 (unsafe_chr (48 + (n / 10) mod 10));
bytes_unsafe_set s 3 (unsafe_chr (48 + n mod 10));
unsafe_to_string s
let lowercase_ascii = function
| 'A' .. 'Z' as c -> unsafe_chr(code c + 32)
| c -> c
let uppercase_ascii = function
| 'a' .. 'z' as c -> unsafe_chr(code c - 32)
| c -> c
type t = char
let compare c1 c2 = code c1 - code c2
let equal (c1: t) (c2: t) = compare c1 c2 = 0
external seeded_hash_param :
int -> int -> int -> 'a -> int = "caml_hash" [@@noalloc]
let seeded_hash seed x = seeded_hash_param 10 100 seed x
let hash x = seeded_hash_param 10 100 0 x
|
