1package Encode::KR::2022_KR;
2use strict;
3
4our $VERSION = do { my @r = (q$Revision: 2.0 $ =~ /\d+/g); sprintf "%d."."%02d" x $#r, @r };
5
6use Encode qw(:fallbacks);
7
8use base qw(Encode::Encoding);
9__PACKAGE__->Define('iso-2022-kr');
10
11sub needs_lines  { 1 }
12
13sub perlio_ok {
14    return 0; # for the time being
15}
16
17sub decode
18{
19    my ($obj, $str, $chk) = @_;
20    my $res = $str;
21    my $residue = iso_euc(\$res);
22    # This is for PerlIO
23    $_[1] = $residue if $chk;
24    return Encode::decode('euc-kr', $res, FB_PERLQQ);
25}
26
27sub encode
28{
29    my ($obj, $utf8, $chk) = @_;
30    # empty the input string in the stack so perlio is ok
31    $_[1] = '' if $chk;
32    my $octet = Encode::encode('euc-kr', $utf8, FB_PERLQQ) ;
33    euc_iso(\$octet);
34    return $octet;
35}
36
37use Encode::CJKConstants qw(:all);
38
39# ISO<->EUC
40
41sub iso_euc{
42    my $r_str = shift;
43    $$r_str =~ s/$RE{'2022_KR'}//gox;  # remove the designator
44    $$r_str =~ s{                      # replace characters in GL
45     \x0e                              # between SO(\x0e) and SI(\x0f)
46     ([^\x0f]*)                        # with characters in GR
47     \x0f
48        }
49    {
50                        my $out= $1;
51      $out =~ tr/\x21-\x7e/\xa1-\xfe/;
52      $out;
53    }geox;
54    my ($residue) = ($$r_str =~ s/(\e.*)$//so);
55    return $residue;
56}
57
58sub euc_iso{
59    no warnings qw(uninitialized);
60    my $r_str = shift;
61    substr($$r_str,0,0)=$ESC{'2022_KR'};  # put the designator at the beg.
62    $$r_str =~ s{                         # move KS X 1001 characters in GR to GL
63        ($RE{EUC_C}+)                     # and enclose them with SO and SI
64        }{
65            my $str = $1;
66            $str =~ tr/\xA1-\xFE/\x21-\x7E/;
67            "\x0e" . $str . "\x0f";
68        }geox;
69    $$r_str;
70}
71
721;
73__END__
74
75=head1 NAME
76
77Encode::KR::2022_KR -- internally used by Encode::KR
78
79=cut
80