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FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/local/lib/perl5/site_perl/5.8.9/MIME/EcoEncode.pm |
# Copyright (C) 2011-2013 MURATA Yasuhisa
# This program is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
package MIME::EcoEncode;
use 5.008005;
use strict;
use warnings;
require Exporter;
our @ISA = qw(Exporter);
our @EXPORT_OK = qw($VERSION);
our @EXPORT = qw(mime_eco mime_deco);
our $VERSION = '0.95';
use MIME::Base64;
use MIME::QuotedPrint;
use constant TAIL => '?=';
our $LF; # line feed
our $BPL; # bytes per line
our $MODE; # unstructured : 0, structured : 1, auto : 2
our $HEAD; # head string
our $HTL; # head + tail length
our $UTF8;
our $REG_W;
our $ADD_EW;
our $REG_RP;
sub mime_eco {
my $str = shift;
return '' unless defined $str;
return '' if $str eq '';
my ($trailing_crlf) = ($str =~ /(\x0d?\x0a|\x0d)$/);
$str =~ tr/\n\r//d;
if ($str =~ /^\s*$/) {
return $trailing_crlf ? $str . $trailing_crlf : $str;
}
my $charset = shift || 'UTF-8';
# invalid option
return undef
unless $charset =~ /^([-0-9A-Za-z_]+)(?:\*[^\?]*)?(\?[QB])?$/i;
my $cs = lc($1);
$charset .= '?B' unless defined $2;
our $LF = shift || "\n"; # line feed
our $BPL = shift || 76; # bytes per line
our $MODE = shift;
$MODE = 2 unless defined $MODE;
my $lss = shift;
$lss = 25 unless defined $lss;
our $HEAD; # head string
our $HTL; # head + tail length
our $UTF8 = 1;
our $REG_W = qr/(.)/;
our $ADD_EW;
our $REG_RP;
my $jp = 0;
my $pos;
my $np;
my $refsub;
my $reg_rp1;
my ($w1, $w1_len, $w2);
my ($sps, $sps_len);
my $sp1 = '';
my $sp1_bak;
my $result;
my $ascii;
my $tmp;
my $count = 0;
my $q_enc = ($charset =~ /Q$/i) ? 1 : 0;
$HEAD = '=?' . $charset . '?';
$HTL = length($HEAD) + 2;
if ($cs ne 'utf-8') {
$UTF8 = 0;
if ($cs eq 'iso-2022-jp') {
$jp = 1;
}
elsif ($cs eq 'shift_jis') {
# range of 2nd byte : [\x40-\x7e\x80-\xfc]
$REG_W = qr/([\x81-\x9f\xe0-\xfc]?.)/;
}
elsif ($cs eq 'gb2312') { # Simplified Chinese
# range of 2nd byte : [\xa1-\xfe]
$REG_W = qr/([\xa1-\xfe]?.)/;
}
elsif ($cs eq 'euc-kr') { # Korean
# range of 2nd byte : [\xa1-\xfe]
$REG_W = qr/([\xa1-\xfe]?.)/;
}
elsif ($cs eq 'big5') { # Traditional Chinese
# range of 2nd byte : [\x40-\x7e\xa1-\xfe]
$REG_W = qr/([\x81-\xfe]?.)/;
}
else { # Single Byte (Latin, Cyrillic, ...)
;
}
}
$str =~ /(\s*)(\S+)/gc;
($sps, $w2) = ($1, $2);
if ($w2 =~ /[^\x21-\x7e]/) {
$ascii = 0;
$sps_len = length($sps);
if ($sps_len > $lss) {
$result = substr($sps, 0, $lss);
$w1 = substr($sps, $lss) . $w2;
$pos = $lss;
}
else {
$result = $sps;
$w1 = $w2;
$pos = $sps_len;
}
}
else {
$ascii = 1;
$result = '';
$w1 = "$sps$w2";
$pos = 0;
}
if ($MODE == 2) {
$MODE = ($w1 =~ /^(?:Subject:|Comments:)$/i) ? 0 : 1;
}
if ($jp) {
if ($q_enc) {
require MIME::EcoEncode::JP_Q;
$MIME::EcoEncode::JP_Q::HEAD = $HEAD;
$MIME::EcoEncode::JP_Q::HTL = $HTL;
$MIME::EcoEncode::JP_Q::LF = $LF;
$MIME::EcoEncode::JP_Q::BPL = $BPL;
$MIME::EcoEncode::JP_Q::MODE = $MODE;
if ($MODE == 0) {
$refsub = \&MIME::EcoEncode::JP_Q::add_ew_jp_q;
}
else {
$refsub = \&add_ew_sh;
$reg_rp1 = qr/\e\(B[\x21-\x7e]*\)\,?$/;
$REG_RP = qr/\e\(B[\x21-\x7e]*?(\){1,3}\,?)$/;
$ADD_EW = \&MIME::EcoEncode::JP_Q::add_ew_jp_q;
}
}
else {
require MIME::EcoEncode::JP_B;
$MIME::EcoEncode::JP_B::HEAD = $HEAD;
$MIME::EcoEncode::JP_B::HTL = $HTL;
$MIME::EcoEncode::JP_B::LF = $LF;
$MIME::EcoEncode::JP_B::BPL = $BPL;
if ($MODE == 0) {
$refsub = \&MIME::EcoEncode::JP_B::add_ew_jp_b;
}
else {
$refsub = \&add_ew_sh;
$reg_rp1 = qr/\e\(B[\x21-\x7e]*\)\,?$/;
$REG_RP = qr/\e\(B[\x21-\x7e]*?(\){1,3}\,?)$/;
$ADD_EW = \&MIME::EcoEncode::JP_B::add_ew_jp_b;
}
}
}
else {
if ($MODE == 0) {
$refsub = $q_enc ? \&add_ew_q : \&add_ew_b;
}
else {
$refsub = \&add_ew_sh;
$reg_rp1 = qr/\)\,?$/;
$REG_RP = qr/(\){1,3}\,?)$/;
$ADD_EW = $q_enc ? \&add_ew_q : \&add_ew_b;
}
}
while ($str =~ /(\s*)(\S+)/gc) {
($sps, $w2) = ($1, $2);
if ($w2 =~ /[^\x21-\x7e]/) {
$sps_len = length($sps);
if ($ascii) { # "ASCII \s+ non-ASCII"
$sp1_bak = $sp1;
$sp1 = chop($sps);
$w1 .= $sps if $sps_len > $lss;
$w1_len = length($w1);
if ($count == 0) {
$result = $w1;
$pos = $w1_len;
}
else {
if (($count > 1) and ($pos + $w1_len + 1 > $BPL)) {
$result .= "$LF$sp1_bak$w1";
$pos = $w1_len + 1;
}
else {
$result .= "$sp1_bak$w1";
$pos += $w1_len + 1;
}
}
if ($sps_len <= $lss) {
if ($pos >= $BPL) {
$result .= $LF . $sps;
$pos = $sps_len - 1;
}
elsif ($pos + $sps_len - 1 > $BPL) {
$result .= substr($sps, 0, $BPL - $pos) . $LF
. substr($sps, $BPL - $pos);
$pos += $sps_len - $BPL - 1;
}
else {
$result .= $sps;
$pos += $sps_len - 1;
}
}
$w1 = $w2;
}
else { # "non-ASCII \s+ non-ASCII"
if (($MODE == 1) and ($sps_len <= $lss)) {
if ($w1 =~ /$reg_rp1/ or $w2 =~ /^\(/) {
if ($count == 0) {
$result .= &$refsub($w1, $pos, \$np, 0);
}
else {
$tmp = &$refsub($w1, 1 + $pos, \$np, 0);
$result .= ($tmp =~ s/^ /$sp1/) ?
"$LF$tmp" : "$sp1$tmp";
}
$pos = $np;
$sp1 = chop($sps);
if ($pos + $sps_len - 1 > $BPL) {
$result .= substr($sps, 0, $BPL - $pos) . $LF
. substr($sps, $BPL - $pos);
$pos += $sps_len - $BPL - 1;
}
else {
$result .= $sps;
$pos += $sps_len - 1;
}
$w1 = $w2;
}
else {
$w1 .= "$sps$w2";
}
}
else {
$w1 .= "$sps$w2";
}
}
$ascii = 0;
}
else { # "ASCII \s+ ASCII" or "non-ASCII \s+ ASCII"
$w1_len = length($w1);
if ($ascii) { # "ASCII \s+ ASCII"
if ($count == 0) {
$result = $w1;
$pos = $w1_len;
}
else {
if (($count > 1) and ($pos + $w1_len + 1 > $BPL)) {
$result .= "$LF$sp1$w1";
$pos = $w1_len + 1;
}
else {
$result .= "$sp1$w1";
$pos += $w1_len + 1;
}
}
}
else { # "non-ASCII \s+ ASCII"
if ($count == 0) {
$result .= &$refsub($w1, $pos, \$np, 0);
$pos = $np;
}
else {
$tmp = &$refsub($w1, 1 + $pos, \$np, 0);
$result .= ($tmp =~ s/^ /$sp1/) ? "$LF$tmp" : "$sp1$tmp";
$pos = $np;
}
}
$sps_len = length($sps);
if ($pos >= $BPL) {
$sp1 = substr($sps, 0, 1);
$w2 = substr($sps, 1) . $w2;
}
elsif ($pos + $sps_len - 1 > $BPL) {
$result .= substr($sps, 0, $BPL - $pos);
$sp1 = substr($sps, $BPL - $pos, 1);
$w2 = substr($sps, $BPL - $pos + 1) . $w2;
$pos = $BPL;
}
else {
$sp1 = chop($sps);
$result .= $sps;
$pos += $sps_len - 1;
}
$w1 = $w2;
$ascii = 1;
}
$count++ if $count <= 1;
}
($sps) = ($str =~ /(.*)/g); # All space of the remainder
if ($ascii) {
$w1 .= $sps;
if ($count == 0) {
$result = $w1;
}
else {
$w1_len = length($w1);
if (($count > 1) and ($pos + $w1_len + 1 > $BPL)) {
$result .= "$LF$sp1$w1";
}
else {
$result .= "$sp1$w1";
}
}
}
else {
$sps_len = length($sps);
if ($count == 0) {
if ($sps_len > $lss) {
$w1 .= substr($sps, 0, $sps_len - $lss);
$result .= &$refsub($w1, $pos, \$np, $lss) .
substr($sps, $sps_len - $lss);
}
else {
$result .= &$refsub($w1, $pos, \$np, $sps_len) . $sps;
}
}
else {
if ($sps_len > $lss) {
$w1 .= substr($sps, 0, $sps_len - $lss);
$tmp = &$refsub($w1, 1 + $pos, \$np, $lss) .
substr($sps, $sps_len - $lss);
}
else {
$tmp = &$refsub($w1, 1 + $pos, \$np, $sps_len) . $sps;
}
$result .= ($tmp =~ s/^ /$sp1/) ? "$LF$tmp" : "$sp1$tmp";
}
}
return $trailing_crlf ? $result . $trailing_crlf : $result;
}
# add encoded-word (for structured header)
# parameters:
# sp : start position (indentation of the first line)
# ep : end position of last line (call by reference)
# rll : room of last line (default: 0)
sub add_ew_sh {
my ($str, $sp, $ep, $rll) = @_;
our $ADD_EW;
our $REG_RP;
my ($lp, $rp); # '(' & ')' : left/right parenthesis
my ($lp_len, $rp_len) = (0, 0);
my $tmp;
if ($str =~ s/^(\({1,3})//) {
$lp = $1;
$lp_len = length($lp);
$sp += $lp_len;
}
if ($str =~ /$REG_RP/) {
$rp = $1;
$rp_len = length($rp);
$rll = $rp_len;
substr($str, -$rp_len) = '';
}
$tmp = &$ADD_EW($str, $sp, $ep, $rll);
if ($lp_len > 0) {
if ($tmp !~ s/^ / $lp/) {
$tmp = $lp . $tmp;
}
}
if ($rp_len > 0) {
$tmp .= $rp;
$$ep += $rp_len;
}
return $tmp;
}
# add encoded-word for "B" encoding
sub add_ew_b {
my ($str, $sp, $ep, $rll, $fof) = @_;
return '' if $str eq '';
our $LF; # line feed
our $BPL; # bytes per line
our $HEAD; # head string
our $HTL; # head + tail length
our $UTF8;
our $REG_W;
my $str_len = length($str);
# encoded size + sp
my $ep_v = int(($str_len + 2) / 3) * 4 + $HTL + $sp;
if ($ep_v + $rll <= $BPL) {
$$ep = $ep_v;
return $HEAD . encode_base64($str, '') . TAIL;
}
my $result = '';
my $w;
utf8::decode($str) if $UTF8; # UTF8 flag on
if ($ep_v <= $BPL) {
$str =~ s/$REG_W$//;
$w = $1;
utf8::encode($w) if $UTF8; # UTF8 flag off
$$ep = int((length($w) + 2) / 3) * 4 + $HTL + 1; # 1 is space
utf8::encode($str) if $UTF8; # UTF8 flag off
$result = ($str eq '') ? ' ' :
$HEAD . encode_base64($str, '') . TAIL . "$LF ";
return $result . $HEAD . encode_base64($w, '') . TAIL;
}
my ($chunk, $chunk_len) = ('', 0);
my $w_len;
my $str_pos = 0;
my $max_len = int(($BPL - $HTL - $sp) / 4) * 3;
my $max_len2 = int(($BPL - $HTL - 1) / 4) * 3;
while ($str =~ /$REG_W/g) {
$w = $1;
utf8::encode($w) if $UTF8; # UTF8 flag off
$w_len = length($w); # size of one character
if ($chunk_len + $w_len > $max_len) {
if ($chunk_len == 0) { # size over at the first time
$result = ' ';
return $result if $fof;
}
else {
$result .= $HEAD . encode_base64($chunk, '') . TAIL . "$LF ";
}
$str_pos += $chunk_len;
# encoded size (1 is space)
$ep_v = int(($str_len - $str_pos + 2) / 3) * 4 + $HTL + 1;
if ($ep_v + $rll <= $BPL) {
utf8::encode($str) if $UTF8; # UTF8 flag off
$chunk = substr($str, $str_pos);
last;
}
if ($ep_v <= $BPL) {
$str =~ s/$REG_W$//;
$w = $1;
utf8::encode($w) if $UTF8; # UTF8 flag off
$w_len = length($w);
utf8::encode($str) if $UTF8; # UTF8 flag off
$chunk = substr($str, $str_pos);
$result .= $HEAD . encode_base64($chunk, '') . TAIL . "$LF ";
$ep_v = int(($w_len + 2) / 3) * 4 + $HTL + 1; # 1 is space
$chunk = $w;
last;
}
$chunk = $w;
$chunk_len = $w_len;
$max_len = $max_len2;
}
else {
$chunk .= $w;
$chunk_len += $w_len;
}
}
$$ep = $ep_v;
return $result . $HEAD . encode_base64($chunk, '') . TAIL;
}
# add encoded-word for "Q" encoding
sub add_ew_q {
my ($str, $sp, $ep, $rll, $fof) = @_;
return '' if $str eq '';
our $LF; # line feed
our $BPL; # bytes per line
our $MODE; # unstructured : 0, structured : 1
our $HEAD; # head string
our $HTL; # head + tail length
our $UTF8;
our $REG_W;
# '.' is added to invalidate RFC 2045 6.7.(3)
my $qstr = encode_qp($str . '.', '');
local *qlen;
chop($qstr); # cut '.'
$qstr =~ s/_/=5F/g;
$qstr =~ tr/ /_/;
$qstr =~ s/\t/=09/g;
if ($MODE) { # structured
$qstr =~ s/([^\w\!\*\+\-\/\=])/sprintf("=%X",ord($1))/ego;
*qlen = sub {
my $str = shift;
return length($str) * 3 - ($str =~ tr/ A-Za-z0-9\!\*\+\-\///) * 2;
};
}
else { # unstructured
$qstr =~ s/\?/=3F/g;
*qlen = sub {
my $str = shift;
return length($str) * 3 - ($str =~ tr/ -\<\>\@-\^\`-\~//) * 2;
};
}
my $ep_v = length($qstr) + $HTL + $sp;
if ($ep_v + $rll <= $BPL) {
$$ep = $ep_v;
return $HEAD . $qstr . TAIL;
}
utf8::decode($str) if $UTF8; # UTF8 flag on
my $result = '';
my $chunk_qlen = 0;
my $w_qlen;
my $enc_len;
my $w;
if ($ep_v <= $BPL) {
$str =~ s/$REG_W$//;
$w = $1;
utf8::encode($w) if $UTF8; # UTF8 flag off
$w_qlen = qlen($w);
$$ep = $w_qlen + $HTL + 1; # 1 is space
$result = ($str eq '') ? ' ' :
$HEAD . substr($qstr, 0, -$w_qlen, '') . TAIL . "$LF ";
return $result . $HEAD . $qstr . TAIL;
}
my $max_len = $BPL - $HTL - $sp;
my $max_len2 = $BPL - $HTL - 1;
while ($str =~ /$REG_W/g) {
$w = $1;
utf8::encode($w) if $UTF8; # UTF8 flag off
$w_qlen = qlen($w);
if ($chunk_qlen + $w_qlen > $max_len) {
if ($chunk_qlen == 0) { # size over at the first time
$result = ' ';
return $result if $fof;
}
else {
$result .= $HEAD . substr($qstr, 0, $chunk_qlen, '')
. TAIL . "$LF ";
}
$ep_v = length($qstr) + $HTL + 1; # 1 is space
if ($ep_v + $rll <= $BPL) {
last;
}
if ($ep_v <= $BPL) {
$str =~ s/$REG_W$//;
$w = $1;
utf8::encode($w) if $UTF8; # UTF8 flag off
$w_qlen = qlen($w);
$result .= $HEAD . substr($qstr, 0, -$w_qlen, '')
. TAIL . "$LF ";
$ep_v = $w_qlen + $HTL + 1; # 1 is space
last;
}
$chunk_qlen = $w_qlen;
$max_len = $max_len2;
}
else {
$chunk_qlen += $w_qlen;
}
}
$$ep = $ep_v;
return $result . $HEAD . $qstr . TAIL;
}
sub mime_deco {
my $str = shift;
my $cb = shift;
my ($charset, $lang, $b_enc, $q_enc);
my $result = '';
my $enc = 0;
my $w_bak = '';
my $sp_len = 0;
my ($lp, $rp); # '(' & ')' : left/right parenthesis
my $reg_ew =
qr{^
=\?
([-0-9A-Za-z_]+) # charset
(?:\*([A-Za-z]{1,8} # language
(?:-[A-Za-z]{1,8})*))? # (RFC 2231 section 5)
\?
(?:
[Bb]\?([0-9A-Za-z\+\/]+={0,2})\?= # "B" encoding
|
[Qq]\?([\x21-\x3e\x40-\x7e]+)\?= # "Q" encoding
)
$}x;
my ($trailing_crlf) = ($str =~ /(\x0d?\x0a|\x0d)$/);
$str =~ tr/\n\r//d;
if ($cb) {
for my $w (split /([\s]+)/, $str) {
$w =~ s/^(\(*)//;
$lp = $1;
$w =~ s/(\)*)$//;
$rp = $1;
if ($w =~ qr/$reg_ew/o) {
($charset, $lang, $b_enc, $q_enc) = ($1, $2, $3, $4);
$lang = '' unless defined $lang;
substr($result, -$sp_len) = "" if ($enc and !$lp);
if (defined $q_enc) {
$q_enc =~ tr/_/ /;
$result .= $lp . &$cb($w, $charset, $lang,
decode_qp($q_enc)) . $rp;
}
else {
$result .= $lp . &$cb($w, $charset, $lang,
decode_base64($b_enc)) . $rp;
}
$enc = 1;
}
else {
if ($enc) {
if ($w =~ /^\s+$/) {
$sp_len = length($w);
}
else {
$enc = 0;
}
}
$result .= $lp . $w . $rp;
}
}
}
else {
my $cs1 = '';
my $res_cs1 = '';
my $res_lang1 = '';
for my $w (split /([\s]+)/, $str) {
$w =~ s/^(\(*)//;
$lp = $1;
$w =~ s/(\)*)$//;
$rp = $1;
if ($w =~ qr/$reg_ew/o) {
($charset, $lang, $b_enc, $q_enc) = ($1, $2, $3, $4);
if ($charset !~ /^US-ASCII$/i) {
if ($cs1) {
if ($cs1 ne lc($charset)) {
$result .= $w;
$enc = 0;
next;
}
}
else {
$cs1 = lc($charset);
$res_cs1 = $charset || '';
$res_lang1 = $lang || '';
}
}
substr($result, -$sp_len) = "" if ($enc and !$lp);
if (defined $q_enc) {
$q_enc =~ tr/_/ /;
$result .= $lp . decode_qp($q_enc) . $rp;
}
else {
$result .= $lp . decode_base64($b_enc) . $rp;
}
$enc = $rp ? 0 : 1;
}
else {
if ($enc) {
if ($w =~ /^\s+$/) {
$sp_len = length($w);
}
else {
$enc = 0;
}
}
$result .= $lp . $w . $rp;
}
}
if ($cs1 eq 'iso-2022-jp') { # remove redundant ESC sequences
$result =~ s/(\e..)([^\e]+)\e\(B(?=\1)/$1$2\n/g;
$result =~ s/\n\e..//g;
$result =~ s/\e\(B(\e..)/$1/g;
}
if (wantarray) {
return ($trailing_crlf ? $result . $trailing_crlf : $result,
$res_cs1, $res_lang1);
}
}
return $trailing_crlf ? $result . $trailing_crlf : $result;
}
1;