diff options
Diffstat (limited to 'cpan/Encode/lib/Encode/JP/JIS7.pm')
| -rw-r--r-- | cpan/Encode/lib/Encode/JP/JIS7.pm | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/cpan/Encode/lib/Encode/JP/JIS7.pm b/cpan/Encode/lib/Encode/JP/JIS7.pm new file mode 100644 index 0000000000..3b5699c7fd --- /dev/null +++ b/cpan/Encode/lib/Encode/JP/JIS7.pm @@ -0,0 +1,165 @@ +package Encode::JP::JIS7; +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); + +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, $chk ); + $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); + local ${^ENCODING}; + 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 |