1#!/usr/local/bin/perl -w
2
3# Written by Dr Stephen N Henson (steve@openssl.org).
4# Licensed under the terms of the OpenSSL license.
5
6use strict;
7
8my ($i, @arr);
9
10# Set up an array with the type of ASCII characters
11# Each set bit represents a character property.
12
13# RFC2253 character properties
14my $RFC2253_ESC = 1;	# Character escaped with \
15my $ESC_CTRL	= 2;	# Escaped control character
16# These are used with RFC1779 quoting using "
17my $NOESC_QUOTE	= 8;	# Not escaped if quoted
18my $PSTRING_CHAR = 0x10;	# Valid PrintableString character
19my $RFC2253_FIRST_ESC = 0x20; # Escaped with \ if first character
20my $RFC2253_LAST_ESC = 0x40;  # Escaped with \ if last character
21
22for($i = 0; $i < 128; $i++) {
23	# Set the RFC2253 escape characters (control)
24	$arr[$i] = 0;
25	if(($i < 32) || ($i > 126)) {
26		$arr[$i] |= $ESC_CTRL;
27	}
28
29	# Some PrintableString characters
30	if(		   ( ( $i >= ord("a")) && ( $i <= ord("z")) )
31			|| (  ( $i >= ord("A")) && ( $i <= ord("Z")) )
32			|| (  ( $i >= ord("0")) && ( $i <= ord("9")) )  ) {
33		$arr[$i] |= $PSTRING_CHAR;
34	}
35}
36
37# Now setup the rest
38
39# Remaining RFC2253 escaped characters
40
41$arr[ord(" ")] |= $NOESC_QUOTE | $RFC2253_FIRST_ESC | $RFC2253_LAST_ESC;
42$arr[ord("#")] |= $NOESC_QUOTE | $RFC2253_FIRST_ESC;
43
44$arr[ord(",")] |= $NOESC_QUOTE | $RFC2253_ESC;
45$arr[ord("+")] |= $NOESC_QUOTE | $RFC2253_ESC;
46$arr[ord("\"")] |= $RFC2253_ESC;
47$arr[ord("\\")] |= $RFC2253_ESC;
48$arr[ord("<")] |= $NOESC_QUOTE | $RFC2253_ESC;
49$arr[ord(">")] |= $NOESC_QUOTE | $RFC2253_ESC;
50$arr[ord(";")] |= $NOESC_QUOTE | $RFC2253_ESC;
51
52# Remaining PrintableString characters
53
54$arr[ord(" ")] |= $PSTRING_CHAR;
55$arr[ord("'")] |= $PSTRING_CHAR;
56$arr[ord("(")] |= $PSTRING_CHAR;
57$arr[ord(")")] |= $PSTRING_CHAR;
58$arr[ord("+")] |= $PSTRING_CHAR;
59$arr[ord(",")] |= $PSTRING_CHAR;
60$arr[ord("-")] |= $PSTRING_CHAR;
61$arr[ord(".")] |= $PSTRING_CHAR;
62$arr[ord("/")] |= $PSTRING_CHAR;
63$arr[ord(":")] |= $PSTRING_CHAR;
64$arr[ord("=")] |= $PSTRING_CHAR;
65$arr[ord("?")] |= $PSTRING_CHAR;
66
67# Now generate the C code
68
69print <<EOF;
70/* Auto generated with chartype.pl script.
71 * Mask of various character properties
72 */
73
74static unsigned char char_type[] = {
75EOF
76
77for($i = 0; $i < 128; $i++) {
78	print("\n") if($i && (($i % 16) == 0));
79	printf("%2d", $arr[$i]);
80	print(",") if ($i != 127);
81}
82print("\n};\n\n");
83
84