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