JezK
Edit File: JIS7.pm
package Encode::JP::JIS7; use strict; use warnings; our $VERSION = do { my @r = ( q$Revision: 2.8 $ =~ /\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; my $obj = bless { Name => $name, h2z => $h2z, jis0212 => $jis0212, } => __PACKAGE__; Encode::define_encoding($obj, $name); } use parent 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($$;$) { my ( $obj, $str, $chk ) = @_; return undef unless defined $str; my $residue = ''; if ($chk) { $str =~ s/([^\x00-\x7f].*)$//so and $residue = $1; } $residue .= jis_euc( \$str ); $_[1] = $residue if $chk; return Encode::decode( 'euc-jp', $str, FB_PERLQQ ); } # # encode is different # sub encode($$;$) { require Encode::JP::H2Z; my ( $obj, $utf8, $chk ) = @_; return undef unless defined $utf8; # 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 || 0 ); $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