1package # This is JSON::backportPP
2    JSON::backportPP5005;
3
4use 5.005;
5use strict;
6
7my @properties;
8
9$JSON::PP5005::VERSION = '1.10';
10
11BEGIN {
12
13    sub utf8::is_utf8 {
14        0; # It is considered that UTF8 flag off for Perl 5.005.
15    }
16
17    sub utf8::upgrade {
18    }
19
20    sub utf8::downgrade {
21        1; # must always return true.
22    }
23
24    sub utf8::encode  {
25    }
26
27    sub utf8::decode {
28    }
29
30    *JSON::PP::JSON_PP_encode_ascii      = \&_encode_ascii;
31    *JSON::PP::JSON_PP_encode_latin1     = \&_encode_latin1;
32    *JSON::PP::JSON_PP_decode_surrogates = \&_decode_surrogates;
33    *JSON::PP::JSON_PP_decode_unicode    = \&_decode_unicode;
34
35    # missing in B module.
36    sub B::SVp_IOK () { 0x01000000; }
37    sub B::SVp_NOK () { 0x02000000; }
38    sub B::SVp_POK () { 0x04000000; }
39
40    $INC{'bytes.pm'} = 1; # dummy
41}
42
43
44
45sub _encode_ascii {
46    join('', map { $_ <= 127 ? chr($_) : sprintf('\u%04x', $_) } unpack('C*', $_[0]) );
47}
48
49
50sub _encode_latin1 {
51    join('', map { chr($_) } unpack('C*', $_[0]) );
52}
53
54
55sub _decode_surrogates { # from http://homepage1.nifty.com/nomenclator/unicode/ucs_utf.htm
56    my $uni = 0x10000 + (hex($_[0]) - 0xD800) * 0x400 + (hex($_[1]) - 0xDC00); # from perlunicode
57    my $bit = unpack('B32', pack('N', $uni));
58
59    if ( $bit =~ /^00000000000(...)(......)(......)(......)$/ ) {
60        my ($w, $x, $y, $z) = ($1, $2, $3, $4);
61        return pack('B*', sprintf('11110%s10%s10%s10%s', $w, $x, $y, $z));
62    }
63    else {
64        Carp::croak("Invalid surrogate pair");
65    }
66}
67
68
69sub _decode_unicode {
70    my ($u) = @_;
71    my ($utf8bit);
72
73    if ( $u =~ /^00([89a-f][0-9a-f])$/i ) { # 0x80-0xff
74         return pack( 'H2', $1 );
75    }
76
77    my $bit = unpack("B*", pack("H*", $u));
78
79    if ( $bit =~ /^00000(.....)(......)$/ ) {
80        $utf8bit = sprintf('110%s10%s', $1, $2);
81    }
82    elsif ( $bit =~ /^(....)(......)(......)$/ ) {
83        $utf8bit = sprintf('1110%s10%s10%s', $1, $2, $3);
84    }
85    else {
86        Carp::croak("Invalid escaped unicode");
87    }
88
89    return pack('B*', $utf8bit);
90}
91
92
93sub JSON::PP::incr_text {
94    $_[0]->{_incr_parser} ||= JSON::PP::IncrParser->new;
95
96    if ( $_[0]->{_incr_parser}->{incr_parsing} ) {
97        Carp::croak("incr_text can not be called when the incremental parser already started parsing");
98    }
99
100    $_[0]->{_incr_parser}->{incr_text} = $_[1] if ( @_ > 1 );
101    $_[0]->{_incr_parser}->{incr_text};
102}
103
104
1051;
106__END__
107
108=pod
109
110=head1 NAME
111
112JSON::PP5005 - Helper module in using JSON::PP in Perl 5.005
113
114=head1 DESCRIPTION
115
116JSON::PP calls internally.
117
118=head1 AUTHOR
119
120Makamaka Hannyaharamitu, E<lt>makamaka[at]cpan.orgE<gt>
121
122
123=head1 COPYRIGHT AND LICENSE
124
125Copyright 2007-2012 by Makamaka Hannyaharamitu
126
127This library is free software; you can redistribute it and/or modify
128it under the same terms as Perl itself.
129
130=cut
131
132