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package # This is JSON::backportPP
JSON::backportPP56;
use 5.006;
use strict;
my @properties;
$JSON::PP56::VERSION = '1.08';
BEGIN {
sub utf8::is_utf8 {
my $len = length $_[0]; # char length
{
use bytes; # byte length;
return $len != length $_[0]; # if !=, UTF8-flagged on.
}
}
sub utf8::upgrade {
; # noop;
}
sub utf8::downgrade ($;$) {
return 1 unless ( utf8::is_utf8( $_[0] ) );
if ( _is_valid_utf8( $_[0] ) ) {
my $downgrade;
for my $c ( unpack( "U*", $_[0] ) ) {
if ( $c < 256 ) {
$downgrade .= pack("C", $c);
}
else {
$downgrade .= pack("U", $c);
}
}
$_[0] = $downgrade;
return 1;
}
else {
Carp::croak("Wide character in subroutine entry") unless ( $_[1] );
0;
}
}
sub utf8::encode ($) { # UTF8 flag off
if ( utf8::is_utf8( $_[0] ) ) {
$_[0] = pack( "C*", unpack( "C*", $_[0] ) );
}
else {
$_[0] = pack( "U*", unpack( "C*", $_[0] ) );
$_[0] = pack( "C*", unpack( "C*", $_[0] ) );
}
}
sub utf8::decode ($) { # UTF8 flag on
if ( _is_valid_utf8( $_[0] ) ) {
utf8::downgrade( $_[0] );
$_[0] = pack( "U*", unpack( "U*", $_[0] ) );
}
}
*JSON::PP::JSON_PP_encode_ascii = \&_encode_ascii;
*JSON::PP::JSON_PP_encode_latin1 = \&_encode_latin1;
*JSON::PP::JSON_PP_decode_surrogates = \&JSON::PP::_decode_surrogates;
*JSON::PP::JSON_PP_decode_unicode = \&JSON::PP::_decode_unicode;
unless ( defined &B::SVp_NOK ) { # missing in B module.
eval q{ sub B::SVp_NOK () { 0x02000000; } };
}
}
sub _encode_ascii {
join('',
map {
$_ <= 127 ?
chr($_) :
$_ <= 65535 ?
sprintf('\u%04x', $_) : sprintf('\u%x\u%x', JSON::PP::_encode_surrogates($_));
} _unpack_emu($_[0])
);
}
sub _encode_latin1 {
join('',
map {
$_ <= 255 ?
chr($_) :
$_ <= 65535 ?
sprintf('\u%04x', $_) : sprintf('\u%x\u%x', JSON::PP::_encode_surrogates($_));
} _unpack_emu($_[0])
);
}
sub _unpack_emu { # for Perl 5.6 unpack warnings
return !utf8::is_utf8($_[0]) ? unpack('C*', $_[0])
: _is_valid_utf8($_[0]) ? unpack('U*', $_[0])
: unpack('C*', $_[0]);
}
sub _is_valid_utf8 {
my $str = $_[0];
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);
}
else {
$is_utf8 = 0 if (!defined $is_utf8);
if ($is_utf8) { # eventually, not utf8
return;
}
}
}
return $is_utf8;
}
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 2007-2012 by Makamaka Hannyaharamitu
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
=cut
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