Initial Commit

database/perl/lib/Encode/KR/2022_KR.pm

@@ -0,0 +1,83 @@
+package Encode::KR::2022_KR;
+use strict;
+use warnings;
+our $VERSION = do { my @r = ( q$Revision: 2.4 $ =~ /\d+/g ); sprintf "%d." . "%02d" x $#r, @r };
+
+use Encode qw(:fallbacks);
+
+use parent qw(Encode::Encoding);
+__PACKAGE__->Define('iso-2022-kr');
+
+sub needs_lines { 1 }
+
+sub perlio_ok {
+    return 0;    # for the time being
+}
+
+sub decode {
+    my ( $obj, $str, $chk ) = @_;
+    return undef unless defined $str;
+    my $res     = $str;
+    my $residue = iso_euc( \$res );
+
+    # This is for PerlIO
+    $_[1] = $residue if $chk;
+    return Encode::decode( 'euc-kr', $res, FB_PERLQQ );
+}
+
+sub encode {
+    my ( $obj, $utf8, $chk ) = @_;
+    return undef unless defined $utf8;
+
+    # empty the input string in the stack so perlio is ok
+    $_[1] = '' if $chk;
+    my $octet = Encode::encode( 'euc-kr', $utf8, FB_PERLQQ );
+    euc_iso( \$octet );
+    return $octet;
+}
+
+use Encode::CJKConstants qw(:all);
+
+# ISO<->EUC
+
+sub iso_euc {
+    my $r_str = shift;
+    $$r_str =~ s/$RE{'2022_KR'}//gox;    # remove the designator
+    $$r_str =~ s{                      # replace characters in GL
+     \x0e                              # between SO(\x0e) and SI(\x0f)
+     ([^\x0f]*)                        # with characters in GR
+     \x0f
+        }
+    {
+                        my $out= $1;
+      $out =~ tr/\x21-\x7e/\xa1-\xfe/;
+      $out;
+    }geox;
+    my ($residue) = ( $$r_str =~ s/(\e.*)$//so );
+    return $residue;
+}
+
+sub euc_iso {
+    no warnings qw(uninitialized);
+    my $r_str = shift;
+    substr( $$r_str, 0, 0 ) =
+      $ESC{'2022_KR'};    # put the designator at the beg.
+    $$r_str =~
+      s{                         # move KS X 1001 characters in GR to GL
+        ($RE{EUC_C}+)                     # and enclose them with SO and SI
+        }{
+            my $str = $1;
+            $str =~ tr/\xA1-\xFE/\x21-\x7E/;
+            "\x0e" . $str . "\x0f";
+        }geox;
+    $$r_str;
+}
+
+1;
+__END__
+
+=head1 NAME
+
+Encode::KR::2022_KR -- internally used by Encode::KR
+
+=cut