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|
package JSON::PP56;
use 5.006;
use strict;
my @properties;
$JSON::PP56::VERSION = '0.13';
BEGIN {
sub utf8::is_utf8 {
1; # It is considered that UTF8 flag on for Perl 5.6.
}
sub utf8::encode (\$) { # UTF8 flag off
${$_[0]} = pack("C*", unpack("C*", ${$_[0]}));
}
sub utf8::decode (\$) { # UTF8 flag on
${$_[0]} = pack("U*", unpack_emu(${$_[0]}));
}
}
eval q| require Unicode::String |;
unless ($@) {
#print Unicode::String->VERSION;
if (Unicode::String->VERSION < 2.08) { # utf16be() exists more than v2.08
eval q| *Unicode::String::utf16be = *Unicode::String::utf16 |;
}
*JSON::PP::JSON_encode_ascii = *_encode_ascii;
*JSON::PP::JSON_encode_latin1 = *_encode_latin1;
*JSON::PP::JSON_decode_unicode = *JSON::PP::_decode_unicode;
eval q|
sub Encode::encode {
my (undef, $str) = @_;
my $u = new Unicode::String;
$u->utf8($str);
$u->utf16be;
}
sub Encode::decode {
my (undef, $str) = @_;
my $u = new Unicode::String;
$u->utf16be($str);
my $utf8 = $u->utf8;
pack("U", unpack("U", $utf8)); # UTF8 flag on
}
|;
die $@ if ($@);
$JSON::PP::_ENABLE_UTF16 = 1;
push @JSON::PP::_properties, 'ascii', 'latin1';
}
else {
*JSON::PP::JSON_encode_ascii = *_noop_encode_ascii;
*JSON::PP::JSON_decode_unicode = *_disable_decode_unicode;
eval q|
sub JSON::PP::ascii {
warn "ascii() is disable in Perl5.6x.";
$_[0]->{ascii} = 0; $_[0];
}
sub JSON::PP::latin1 {
warn "latin1() is disable in Perl5.6x.";
$_[0]->{latin1} = 0; $_[0];
}
|;
}
sub _encode_ascii {
join('',
map {
$_ <= 127 ?
chr($_) :
$_ <= 65535 ?
sprintf('\u%04x', $_) :
join("", map { '\u' . $_ }
unpack("H4H4", Encode::encode('UTF-16BE', pack("U", $_))));
} unpack_emu($_[0])
);
}
sub _encode_latin1 {
join('',
map {
$_ <= 255 ?
chr($_) :
$_ <= 65535 ?
sprintf('\u%04x', $_) :
join("", map { '\u' . $_ }
unpack("H4H4", Encode::encode('UTF-16BE', pack("U", $_))));
} unpack_emu($_[0])
);
}
sub unpack_emu { # for Perl 5.6 unpack warnings
my $str = $_[0];
my @ret;
my $is_utf8;
while ($str =~ /(?:
(
[\x00-\x7F]
|[\xC2-\xDF][\x80-\xBF]
|[\xE0][\xA0-\xBF][\x80-\xBF]
|[\xE1-\xEC][\x80-\xBF][\x80-\xBF]
|[\xED][\x80-\x9F][\x80-\xBF]
|[\xEE-\xEF][\x80-\xBF][\x80-\xBF]
|[\xF0][\x90-\xBF][\x80-\xBF][\x80-\xBF]
|[\xF1-\xF3][\x80-\xBF][\x80-\xBF][\x80-\xBF]
|[\xF4][\x80-\x8F][\x80-\xBF][\x80-\xBF]
)
| (.)
)/xg)
{
if (defined $1) {
$is_utf8 = 1 if (!defined $is_utf8);
if ($is_utf8) {
push @ret, unpack('U', $1);
}
else {
push @ret, unpack('C*', $1);
}
}
else {
$is_utf8 = 0 if (!defined $is_utf8);
if ($is_utf8) { # eventually, not utf8
return unpack('C*', $str);
}
push @ret, unpack('C', $2);
}
}
return @ret;
}
sub _noop_encode_ascii {
# noop
}
sub _disable_decode_unicode { chr(hex($_[0])); }
1;
__END__
=pod
=head1 NAME
JSON::PP56 - Helper module in using JSON::PP in Perl 5.6
=head1 DESCRIPTION
JSON::PP calls internally.
=head1 AUTHOR
Makamaka Hannyaharamitu, E<lt>makamaka[at]cpan.orgE<gt>
=head1 COPYRIGHT AND LICENSE
Copyright 2007 by Makamaka Hannyaharamitu
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
=cut
|
