| 1 | package Encode::JP::JIS7; |
| 2 | use strict; |
| 3 | |
| 4 | our $VERSION = do { my @r = (q$Revision: 1.8 $ =~ /\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 | our $DEBUG = 0; |
| 28 | |
| 29 | # |
| 30 | # decode is identical for all 2022 variants |
| 31 | # |
| 32 | |
| 33 | sub decode($$;$) |
| 34 | { |
| 35 | my ($obj, $str, $chk) = @_; |
| 36 | my $residue = ''; |
| 37 | if ($chk){ |
| 38 | $str =~ s/([^\x00-\x7f].*)$//so; |
| 39 | $1 and $residue = $1; |
| 40 | } |
| 41 | $residue .= jis_euc(\$str); |
| 42 | $_[1] = $residue if $chk; |
| 43 | return Encode::decode('euc-jp', $str, FB_PERLQQ); |
| 44 | } |
| 45 | |
| 46 | # |
| 47 | # encode is different |
| 48 | # |
| 49 | |
| 50 | sub encode($$;$) |
| 51 | { |
| 52 | require Encode::JP::H2Z; |
| 53 | my ($obj, $utf8, $chk) = @_; |
| 54 | # empty the input string in the stack so perlio is ok |
| 55 | $_[1] = '' if $chk; |
| 56 | my ($h2z, $jis0212) = @$obj{qw(h2z jis0212)}; |
| 57 | my $octet = Encode::encode('euc-jp', $utf8, FB_PERLQQ) ; |
| 58 | $h2z and &Encode::JP::H2Z::h2z(\$octet); |
| 59 | euc_jis(\$octet, $jis0212); |
| 60 | return $octet; |
| 61 | } |
| 62 | |
| 63 | |
| 64 | # JIS<->EUC |
| 65 | |
| 66 | sub jis_euc { |
| 67 | my $r_str = shift; |
| 68 | $$r_str =~ s( |
| 69 | ($RE{JIS_0212}|$RE{JIS_0208}|$RE{ISO_ASC}|$RE{JIS_KANA}) |
| 70 | ([^\e]*) |
| 71 | ) |
| 72 | { |
| 73 | my ($esc, $chunk) = ($1, $2); |
| 74 | if ($esc !~ /$RE{ISO_ASC}/o) { |
| 75 | $chunk =~ tr/\x21-\x7e/\xa1-\xfe/; |
| 76 | if ($esc =~ /$RE{JIS_KANA}/o) { |
| 77 | $chunk =~ s/([\xa1-\xdf])/\x8e$1/og; |
| 78 | } |
| 79 | elsif ($esc =~ /$RE{JIS_0212}/o) { |
| 80 | $chunk =~ s/([\xa1-\xfe][\xa1-\xfe])/\x8f$1/og; |
| 81 | } |
| 82 | } |
| 83 | $chunk; |
| 84 | }geox; |
| 85 | my ($residue) = ($$r_str =~ s/(\e.*)$//so); |
| 86 | return $residue; |
| 87 | } |
| 88 | |
| 89 | sub euc_jis{ |
| 90 | no warnings qw(uninitialized); |
| 91 | my $r_str = shift; |
| 92 | my $jis0212 = shift; |
| 93 | $$r_str =~ s{ |
| 94 | ((?:$RE{EUC_C})+|(?:$RE{EUC_KANA})+|(?:$RE{EUC_0212})+) |
| 95 | }{ |
| 96 | my $chunk = $1; |
| 97 | my $esc = |
| 98 | ( $chunk =~ tr/\x8E//d ) ? $ESC{KANA} : |
| 99 | ( $chunk =~ tr/\x8F//d ) ? $ESC{JIS_0212} : |
| 100 | $ESC{JIS_0208}; |
| 101 | if ($esc eq $ESC{JIS_0212} && !$jis0212){ |
| 102 | # fallback to '?' |
| 103 | $chunk =~ tr/\xA1-\xFE/\x3F/; |
| 104 | }else{ |
| 105 | $chunk =~ tr/\xA1-\xFE/\x21-\x7E/; |
| 106 | } |
| 107 | $esc . $chunk . $ESC{ASC}; |
| 108 | }geox; |
| 109 | $$r_str =~ |
| 110 | s/\Q$ESC{ASC}\E |
| 111 | (\Q$ESC{KANA}\E|\Q$ESC{JIS_0212}\E|\Q$ESC{JIS_0208}\E)/$1/gox; |
| 112 | $$r_str; |
| 113 | } |
| 114 | |
| 115 | 1; |
| 116 | __END__ |
| 117 | |
| 118 | |
| 119 | =head1 NAME |
| 120 | |
| 121 | Encode::JP::JIS7 -- internally used by Encode::JP |
| 122 | |
| 123 | =cut |