| 1 | package Encode::JP::JIS7; |
| 2 | use strict; |
| 3 | |
| 4 | our $VERSION = do { my @r = (q$Revision: 2.0 $ =~ /\d+/g); sprintf "%d."."%02d" x $#r, @r }; |
| 5 | |
| 6 | use Encode qw(:fallbacks); |
| 7 | |
| 8 | for my $name ('7bit-jis', 'iso-2022-jp', 'iso-2022-jp-1'){ |
| 9 | my $h2z = ($name eq '7bit-jis') ? 0 : 1; |
| 10 | my $jis0212 = ($name eq 'iso-2022-jp') ? 0 : 1; |
| 11 | |
| 12 | $Encode::Encoding{$name} = |
| 13 | bless { |
| 14 | Name => $name, |
| 15 | h2z => $h2z, |
| 16 | jis0212 => $jis0212, |
| 17 | } => __PACKAGE__; |
| 18 | } |
| 19 | |
| 20 | use base qw(Encode::Encoding); |
| 21 | |
| 22 | # we override this to 1 so PerlIO works |
| 23 | sub needs_lines { 1 } |
| 24 | |
| 25 | use Encode::CJKConstants qw(:all); |
| 26 | |
| 27 | # |
| 28 | # decode is identical for all 2022 variants |
| 29 | # |
| 30 | |
| 31 | sub decode($$;$) |
| 32 | { |
| 33 | my ($obj, $str, $chk) = @_; |
| 34 | my $residue = ''; |
| 35 | if ($chk){ |
| 36 | $str =~ s/([^\x00-\x7f].*)$//so and $residue = $1; |
| 37 | } |
| 38 | $residue .= jis_euc(\$str); |
| 39 | $_[1] = $residue if $chk; |
| 40 | return Encode::decode('euc-jp', $str, FB_PERLQQ); |
| 41 | } |
| 42 | |
| 43 | # |
| 44 | # encode is different |
| 45 | # |
| 46 | |
| 47 | sub encode($$;$) |
| 48 | { |
| 49 | require Encode::JP::H2Z; |
| 50 | my ($obj, $utf8, $chk) = @_; |
| 51 | # empty the input string in the stack so perlio is ok |
| 52 | $_[1] = '' if $chk; |
| 53 | my ($h2z, $jis0212) = @$obj{qw(h2z jis0212)}; |
| 54 | my $octet = Encode::encode('euc-jp', $utf8, FB_PERLQQ) ; |
| 55 | $h2z and &Encode::JP::H2Z::h2z(\$octet); |
| 56 | euc_jis(\$octet, $jis0212); |
| 57 | return $octet; |
| 58 | } |
| 59 | |
| 60 | # |
| 61 | # cat_decode |
| 62 | # |
| 63 | my $re_scan_jis_g = qr{ |
| 64 | \G ( ($RE{JIS_0212}) | $RE{JIS_0208} | |
| 65 | ($RE{ISO_ASC}) | ($RE{JIS_KANA}) | ) |
| 66 | ([^\e]*) |
| 67 | }x; |
| 68 | sub cat_decode { # ($obj, $dst, $src, $pos, $trm, $chk) |
| 69 | my ($obj, undef, undef, $pos, $trm) = @_; # currently ignores $chk |
| 70 | my ($rdst, $rsrc, $rpos) = \@_[1,2,3]; |
| 71 | local ${^ENCODING}; |
| 72 | use bytes; |
| 73 | my $opos = pos($$rsrc); |
| 74 | pos($$rsrc) = $pos; |
| 75 | while ($$rsrc =~ /$re_scan_jis_g/gc) { |
| 76 | my ($esc, $esc_0212, $esc_asc, $esc_kana, $chunk) = |
| 77 | ($1, $2, $3, $4, $5); |
| 78 | |
| 79 | unless ($chunk) { $esc or last; next; } |
| 80 | |
| 81 | if ($esc && !$esc_asc) { |
| 82 | $chunk =~ tr/\x21-\x7e/\xa1-\xfe/; |
| 83 | if ($esc_kana) { |
| 84 | $chunk =~ s/([\xa1-\xdf])/\x8e$1/og; |
| 85 | } elsif ($esc_0212) { |
| 86 | $chunk =~ s/([\xa1-\xfe][\xa1-\xfe])/\x8f$1/og; |
| 87 | } |
| 88 | $chunk = Encode::decode('euc-jp', $chunk, 0); |
| 89 | } |
| 90 | elsif ((my $npos = index($chunk, $trm)) >= 0) { |
| 91 | $$rdst .= substr($chunk, 0, $npos + length($trm)); |
| 92 | $$rpos += length($esc) + $npos + length($trm); |
| 93 | pos($$rsrc) = $opos; |
| 94 | return 1; |
| 95 | } |
| 96 | $$rdst .= $chunk; |
| 97 | $$rpos = pos($$rsrc); |
| 98 | } |
| 99 | $$rpos = pos($$rsrc); |
| 100 | pos($$rsrc) = $opos; |
| 101 | return ''; |
| 102 | } |
| 103 | |
| 104 | # JIS<->EUC |
| 105 | my $re_scan_jis = qr{ |
| 106 | (?:($RE{JIS_0212})|$RE{JIS_0208}|($RE{ISO_ASC})|($RE{JIS_KANA}))([^\e]*) |
| 107 | }x; |
| 108 | |
| 109 | sub jis_euc { |
| 110 | local ${^ENCODING}; |
| 111 | my $r_str = shift; |
| 112 | $$r_str =~ s($re_scan_jis) |
| 113 | { |
| 114 | my ($esc_0212, $esc_asc, $esc_kana, $chunk) = |
| 115 | ($1, $2, $3, $4); |
| 116 | if (!$esc_asc) { |
| 117 | $chunk =~ tr/\x21-\x7e/\xa1-\xfe/; |
| 118 | if ($esc_kana) { |
| 119 | $chunk =~ s/([\xa1-\xdf])/\x8e$1/og; |
| 120 | } |
| 121 | elsif ($esc_0212) { |
| 122 | $chunk =~ s/([\xa1-\xfe][\xa1-\xfe])/\x8f$1/og; |
| 123 | } |
| 124 | } |
| 125 | $chunk; |
| 126 | }geox; |
| 127 | my ($residue) = ($$r_str =~ s/(\e.*)$//so); |
| 128 | return $residue; |
| 129 | } |
| 130 | |
| 131 | sub euc_jis{ |
| 132 | no warnings qw(uninitialized); |
| 133 | my $r_str = shift; |
| 134 | my $jis0212 = shift; |
| 135 | $$r_str =~ s{ |
| 136 | ((?:$RE{EUC_C})+|(?:$RE{EUC_KANA})+|(?:$RE{EUC_0212})+) |
| 137 | }{ |
| 138 | my $chunk = $1; |
| 139 | my $esc = |
| 140 | ( $chunk =~ tr/\x8E//d ) ? $ESC{KANA} : |
| 141 | ( $chunk =~ tr/\x8F//d ) ? $ESC{JIS_0212} : |
| 142 | $ESC{JIS_0208}; |
| 143 | if ($esc eq $ESC{JIS_0212} && !$jis0212){ |
| 144 | # fallback to '?' |
| 145 | $chunk =~ tr/\xA1-\xFE/\x3F/; |
| 146 | }else{ |
| 147 | $chunk =~ tr/\xA1-\xFE/\x21-\x7E/; |
| 148 | } |
| 149 | $esc . $chunk . $ESC{ASC}; |
| 150 | }geox; |
| 151 | $$r_str =~ |
| 152 | s/\Q$ESC{ASC}\E |
| 153 | (\Q$ESC{KANA}\E|\Q$ESC{JIS_0212}\E|\Q$ESC{JIS_0208}\E)/$1/gox; |
| 154 | $$r_str; |
| 155 | } |
| 156 | |
| 157 | 1; |
| 158 | __END__ |
| 159 | |
| 160 | |
| 161 | =head1 NAME |
| 162 | |
| 163 | Encode::JP::JIS7 -- internally used by Encode::JP |
| 164 | |
| 165 | =cut |