Initial commit of OpenSPARC T2 architecture model.

[OpenSPARC-T2-SAM] / sam-t2 / devtools / amd64 / lib / perl5 / 5.8.8 / Encode / JP / JIS7.pm

package Encode::JP::JIS7;
use strict;

our $VERSION = do { my @r = (q$Revision: 2.0 $ =~ /\d+/g); sprintf "%d."."%02d" x $#r, @r };

use Encode qw(:fallbacks);

for my $name ('7bit-jis', 'iso-2022-jp', 'iso-2022-jp-1'){
   my $h2z     = ($name eq '7bit-jis')    ? 0 : 1;
   my $jis0212 = ($name eq 'iso-2022-jp') ? 0 : 1;

   $Encode::Encoding{$name} =
       bless {
              Name      =>   $name,
              h2z       =>   $h2z,
              jis0212   =>   $jis0212,
             } => __PACKAGE__;
}

use base qw(Encode::Encoding);

# we override this to 1 so PerlIO works
sub needs_lines { 1 }

use Encode::CJKConstants qw(:all);

#
# decode is identical for all 2022 variants
#

sub decode($$;$)
{
   my ($obj, $str, $chk) = @_;
   my $residue = '';
   if ($chk){
       $str =~ s/([^\x00-\x7f].*)$//so and $residue = $1;
   }
   $residue .= jis_euc(\$str);
   $_[1] = $residue if $chk;
   return Encode::decode('euc-jp', $str, FB_PERLQQ);
}

#
# encode is different
#

sub encode($$;$)
{
   require Encode::JP::H2Z;
   my ($obj, $utf8, $chk) = @_;
   # empty the input string in the stack so perlio is ok
   $_[1] = '' if $chk;
   my ($h2z, $jis0212) = @$obj{qw(h2z jis0212)};
   my $octet = Encode::encode('euc-jp', $utf8, FB_PERLQQ) ;
   $h2z and &Encode::JP::H2Z::h2z(\$octet);
   euc_jis(\$octet, $jis0212);
   return $octet;
}

#
# cat_decode
#
my $re_scan_jis_g = qr{
  \G ( ($RE{JIS_0212}) |  $RE{JIS_0208}  |
       ($RE{ISO_ASC})  | ($RE{JIS_KANA}) | )
     ([^\e]*)
}x;
sub cat_decode { # ($obj, $dst, $src, $pos, $trm, $chk)
   my ($obj, undef, undef, $pos, $trm) = @_; # currently ignores $chk
   my ($rdst, $rsrc, $rpos) = \@_[1,2,3];
   local ${^ENCODING};
   use bytes;
   my $opos = pos($$rsrc);
   pos($$rsrc) = $pos;
   while ($$rsrc =~ /$re_scan_jis_g/gc) {
       my ($esc, $esc_0212, $esc_asc, $esc_kana, $chunk) =
         ($1, $2, $3, $4, $5);

       unless ($chunk) { $esc or last;  next; }

       if ($esc && !$esc_asc) {
           $chunk =~ tr/\x21-\x7e/\xa1-\xfe/;
           if ($esc_kana) {
               $chunk =~ s/([\xa1-\xdf])/\x8e$1/og;
           } elsif ($esc_0212) {
               $chunk =~ s/([\xa1-\xfe][\xa1-\xfe])/\x8f$1/og;
           }
           $chunk = Encode::decode('euc-jp', $chunk, 0);
       }
       elsif ((my $npos = index($chunk, $trm)) >= 0) {
           $$rdst .= substr($chunk, 0, $npos + length($trm));
           $$rpos += length($esc) + $npos + length($trm);
           pos($$rsrc) = $opos;
           return 1;
       }
       $$rdst .= $chunk;
       $$rpos = pos($$rsrc);
   }
   $$rpos = pos($$rsrc);
   pos($$rsrc) = $opos;
   return '';
}

# JIS<->EUC
my $re_scan_jis = qr{
  (?:($RE{JIS_0212})|$RE{JIS_0208}|($RE{ISO_ASC})|($RE{JIS_KANA}))([^\e]*)
}x;

sub jis_euc {
   local ${^ENCODING};
   my $r_str = shift;
   $$r_str =~ s($re_scan_jis)
   {
       my ($esc_0212, $esc_asc, $esc_kana, $chunk) =
          ($1, $2, $3, $4);
       if (!$esc_asc) {
           $chunk =~ tr/\x21-\x7e/\xa1-\xfe/;
           if ($esc_kana) {
               $chunk =~ s/([\xa1-\xdf])/\x8e$1/og;
           }
           elsif ($esc_0212) {
               $chunk =~ s/([\xa1-\xfe][\xa1-\xfe])/\x8f$1/og;
           }
       }
       $chunk;
   }geox;
   my ($residue) = ($$r_str =~ s/(\e.*)$//so);
   return $residue;
}

sub euc_jis{
   no warnings qw(uninitialized);
   my $r_str = shift;
   my $jis0212 = shift;
   $$r_str =~ s{
       ((?:$RE{EUC_C})+|(?:$RE{EUC_KANA})+|(?:$RE{EUC_0212})+)
       }{
           my $chunk = $1;
           my $esc =
               ( $chunk =~ tr/\x8E//d ) ? $ESC{KANA} :
                   ( $chunk =~ tr/\x8F//d ) ? $ESC{JIS_0212} :
                       $ESC{JIS_0208};
           if ($esc eq $ESC{JIS_0212} && !$jis0212){
               # fallback to '?'
               $chunk =~ tr/\xA1-\xFE/\x3F/;
           }else{
               $chunk =~ tr/\xA1-\xFE/\x21-\x7E/;
           }
           $esc . $chunk . $ESC{ASC};
       }geox;
   $$r_str =~
       s/\Q$ESC{ASC}\E
           (\Q$ESC{KANA}\E|\Q$ESC{JIS_0212}\E|\Q$ESC{JIS_0208}\E)/$1/gox;
   $$r_str;
}

1;
__END__


=head1 NAME

Encode::JP::JIS7 -- internally used by Encode::JP

=cut