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920dae64 AT |
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 |