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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: 1.6 $ =~ /\d+/g); sprintf "%d."."%02d" x $#r, @r }; |
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5 | |
6 | use Encode qw(:fallbacks); |
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7 | |
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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; |
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11 | |
12 | $Encode::Encoding{$name} = |
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13 | bless { |
14 | Name => $name, |
15 | h2z => $h2z, |
16 | jis0212 => $jis0212, |
17 | } => __PACKAGE__; |
18 | } |
19 | |
20 | sub name { shift->{'Name'} } |
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21 | |
22 | sub new_sequence { $_[0] } |
23 | |
24 | sub needs_lines { 1 } |
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25 | |
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26 | sub perlio_ok { |
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27 | eval{ require PerlIO::encoding }; |
28 | if ($@){ |
29 | return 0; |
30 | }else{ |
31 | return (PerlIO::encoding->VERSION >= 0.03); |
32 | } |
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33 | } |
34 | |
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35 | use Encode::CJKConstants qw(:all); |
36 | |
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37 | our $DEBUG = 0; |
38 | |
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39 | # |
40 | # decode is identical for all 2022 variants |
41 | # |
42 | |
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43 | sub decode($$;$) |
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44 | { |
45 | my ($obj,$str,$chk) = @_; |
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46 | my $residue = jis_euc(\$str); |
47 | # This is for PerlIO |
48 | $_[1] = $residue if $chk; |
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49 | return Encode::decode('euc-jp', $str, FB_PERLQQ); |
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50 | } |
51 | |
52 | # |
53 | # encode is different |
54 | # |
55 | |
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56 | sub encode($$;$) |
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57 | { |
58 | require Encode::JP::H2Z; |
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59 | my ($obj, $utf8, $chk) = @_; |
60 | # empty the input string in the stack so perlio is ok |
61 | $_[1] = '' if $chk; |
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62 | my ($h2z, $jis0212) = @$obj{qw(h2z jis0212)}; |
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63 | my $octet = Encode::encode('euc-jp', $utf8, FB_PERLQQ) ; |
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64 | $h2z and &Encode::JP::H2Z::h2z(\$octet); |
65 | euc_jis(\$octet, $jis0212); |
66 | return $octet; |
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67 | } |
68 | |
69 | |
70 | # JIS<->EUC |
71 | |
72 | sub jis_euc { |
73 | my $r_str = shift; |
74 | $$r_str =~ s( |
75 | ($RE{JIS_0212}|$RE{JIS_0208}|$RE{ISO_ASC}|$RE{JIS_KANA}) |
76 | ([^\e]*) |
77 | ) |
78 | { |
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79 | my ($esc, $chunk) = ($1, $2); |
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80 | if ($esc !~ /$RE{ISO_ASC}/o) { |
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81 | $chunk =~ tr/\x21-\x7e/\xa1-\xfe/; |
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82 | if ($esc =~ /$RE{JIS_KANA}/o) { |
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83 | $chunk =~ s/([\xa1-\xdf])/\x8e$1/og; |
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84 | } |
85 | elsif ($esc =~ /$RE{JIS_0212}/o) { |
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86 | $chunk =~ s/([\xa1-\xfe][\xa1-\xfe])/\x8f$1/og; |
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87 | } |
88 | } |
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89 | $chunk; |
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90 | }geox; |
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91 | my ($residue) = ($$r_str =~ s/(\e.*)$//so); |
92 | return $residue; |
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93 | } |
94 | |
95 | sub euc_jis{ |
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96 | no warnings qw(uninitialized); |
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97 | my $r_str = shift; |
98 | my $jis0212 = shift; |
99 | $$r_str =~ s{ |
100 | ((?:$RE{EUC_C})+|(?:$RE{EUC_KANA})+|(?:$RE{EUC_0212})+) |
101 | }{ |
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102 | my $chunk = $1; |
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103 | my $esc = |
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104 | ( $chunk =~ tr/\x8E//d ) ? $ESC{KANA} : |
105 | ( $chunk =~ tr/\x8F//d ) ? $ESC{JIS_0212} : |
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106 | $ESC{JIS_0208}; |
107 | if ($esc eq $ESC{JIS_0212} && !$jis0212){ |
108 | # fallback to '?' |
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109 | $chunk =~ tr/\xA1-\xFE/\x3F/; |
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110 | }else{ |
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111 | $chunk =~ tr/\xA1-\xFE/\x21-\x7E/; |
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112 | } |
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113 | $esc . $chunk . $ESC{ASC}; |
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114 | }geox; |
115 | $$r_str =~ |
116 | s/\Q$ESC{ASC}\E |
117 | (\Q$ESC{KANA}\E|\Q$ESC{JIS_0212}\E|\Q$ESC{JIS_0208}\E)/$1/gox; |
118 | $$r_str; |
119 | } |
120 | |
121 | 1; |
122 | __END__ |
123 | |
124 | |
125 | =head1 NAME |
126 | |
127 | Encode::JP::JIS7 -- internally used by Encode::JP |
128 | |
129 | =cut |