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1 | package Encode::JP::JIS7; |
2 | use strict; |
3 | |
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4 | our $VERSION = do { my @r = (q$Revision: 1.2 $ =~ /\d+/g); sprintf "%d."."%02d" x $#r, @r }; |
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5 | |
6 | require Encode; |
7 | for my $name ('7bit-jis', 'iso-2022-jp', 'iso-2022-jp-1'){ |
8 | my $h2z = ($name eq '7bit-jis') ? 0 : 1; |
9 | my $jis0212 = ($name eq 'iso-2022-jp') ? 0 : 1; |
10 | |
11 | $Encode::Encoding{$name} = |
12 | bless { |
13 | Name => $name, |
14 | h2z => $h2z, |
15 | jis0212 => $jis0212, |
16 | } => __PACKAGE__; |
17 | } |
18 | |
19 | sub name { shift->{'Name'} } |
20 | sub new_sequence { $_[0] }; |
21 | |
22 | use Encode::CJKConstants qw(:all); |
23 | |
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24 | our $DEBUG = 0; |
25 | |
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26 | # |
27 | # decode is identical for all 2022 variants |
28 | # |
29 | |
30 | sub decode |
31 | { |
32 | my ($obj,$str,$chk) = @_; |
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33 | my $residue = jis_euc(\$str); |
34 | # This is for PerlIO |
35 | $_[1] = $residue if $chk; |
36 | # use perlqq fallback for euc-jp -> utf8 |
37 | return Encode::decode('euc-jp', $str, 0); |
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38 | } |
39 | |
40 | # |
41 | # encode is different |
42 | # |
43 | |
44 | sub encode |
45 | { |
46 | require Encode::JP::H2Z; |
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47 | my ($obj, $utf8, $chk) = @_; |
48 | # empty the input string in the stack so perlio is ok |
49 | $_[1] = '' if $chk; |
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50 | my ($h2z, $jis0212) = @$obj{qw(h2z jis0212)}; |
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51 | my $octet = Encode::encode('euc-jp', $utf8, 0) ; |
52 | $h2z and &Encode::JP::H2Z::h2z(\$octet); |
53 | euc_jis(\$octet, $jis0212); |
54 | return $octet; |
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55 | } |
56 | |
57 | |
58 | # JIS<->EUC |
59 | |
60 | sub jis_euc { |
61 | my $r_str = shift; |
62 | $$r_str =~ s( |
63 | ($RE{JIS_0212}|$RE{JIS_0208}|$RE{ISO_ASC}|$RE{JIS_KANA}) |
64 | ([^\e]*) |
65 | ) |
66 | { |
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67 | my ($esc, $chunk) = ($1, $2); |
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68 | if ($esc !~ /$RE{ISO_ASC}/o) { |
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69 | $chunk =~ tr/\x21-\x7e/\xa1-\xfe/; |
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70 | if ($esc =~ /$RE{JIS_KANA}/o) { |
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71 | $chunk =~ s/([\xa1-\xdf])/\x8e$1/og; |
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72 | } |
73 | elsif ($esc =~ /$RE{JIS_0212}/o) { |
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74 | $chunk =~ s/([\xa1-\xfe][\xa1-\xfe])/\x8f$1/og; |
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75 | } |
76 | } |
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77 | $chunk; |
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78 | }geox; |
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79 | my ($residue) = ($$r_str =~ s/(\e.*)$//so); |
80 | return $residue; |
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81 | } |
82 | |
83 | sub euc_jis{ |
84 | my $r_str = shift; |
85 | my $jis0212 = shift; |
86 | $$r_str =~ s{ |
87 | ((?:$RE{EUC_C})+|(?:$RE{EUC_KANA})+|(?:$RE{EUC_0212})+) |
88 | }{ |
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89 | my $chunk = $1; |
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90 | my $esc = |
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91 | ( $chunk =~ tr/\x8E//d ) ? $ESC{KANA} : |
92 | ( $chunk =~ tr/\x8F//d ) ? $ESC{JIS_0212} : |
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93 | $ESC{JIS_0208}; |
94 | if ($esc eq $ESC{JIS_0212} && !$jis0212){ |
95 | # fallback to '?' |
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96 | $chunk =~ tr/\xA1-\xFE/\x3F/; |
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97 | }else{ |
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98 | $chunk =~ tr/\xA1-\xFE/\x21-\x7E/; |
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99 | } |
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100 | $esc . $chunk . $ESC{ASC}; |
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101 | }geox; |
102 | $$r_str =~ |
103 | s/\Q$ESC{ASC}\E |
104 | (\Q$ESC{KANA}\E|\Q$ESC{JIS_0212}\E|\Q$ESC{JIS_0208}\E)/$1/gox; |
105 | $$r_str; |
106 | } |
107 | |
108 | 1; |
109 | __END__ |
110 | |
111 | |
112 | =head1 NAME |
113 | |
114 | Encode::JP::JIS7 -- internally used by Encode::JP |
115 | |
116 | =cut |