blob: 43ccdef71f8726f9818409102b1dc5b2083f305b (
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
|
(***********************************************************************)
(* *)
(* Caml Special Light *)
(* *)
(* Xavier Leroy, projet Cristal, INRIA Rocquencourt *)
(* *)
(* Copyright 1995 Institut National de Recherche en Informatique et *)
(* Automatique. Distributed only by permission. *)
(* *)
(***********************************************************************)
(* $Id$ *)
(* Character operations *)
external code: char -> int = "%identity"
external unsafe_chr: int -> char = "%identity"
let chr n =
if n < 0 or n > 255 then invalid_arg "Char.chr" else unsafe_chr n
external is_printable: char -> bool = "is_printable"
let escaped = function
'\'' -> "\\'"
| '\\' -> "\\\\"
| '\n' -> "\\n"
| '\t' -> "\\t"
| c -> if is_printable c then
String.make 1 c
else begin
let n = code c in
let s = String.create 4 in
String.unsafe_set s 0 '\\';
String.unsafe_set s 1 (unsafe_chr (48 + n / 100));
String.unsafe_set s 2 (unsafe_chr (48 + (n / 10) mod 10));
String.unsafe_set s 3 (unsafe_chr (48 + n mod 10));
s
end
|
