package String::Multibyte::GBK;
use vars qw($VERSION);
$VERSION = '1.12';
+{
charset => 'GBK',
regexp => '(?:[\x00-\x80]|[\x81-\xFE][\x40-\x7E\x80-\xFE])',
cmpchar => sub { $_[0] cmp $_[1] },
nextchar => sub {
my $ch = shift;
my $len = length $ch;
if ($len == 1) {
return $ch eq "\x80"
? "\x81\x40"
: chr(ord($ch)+1);
}
elsif ($len == 2) {
my($c, $d) = unpack('CC', $ch);
return $ch eq "\xFE\xFE"
? undef
: $d == 0xFE
? chr($c+1)."\x40"
: $d == 0x7E
? chr($c) ."\x80"
: pack('CC', $c, $d+1);
}
else {
return;
}
},
};
__END__
=head1 NAME
String::Multibyte::GBK - internally used by String::Multibyte
for GBK
=head1 SYNOPSIS
use String::Multibyte;
$gbk = String::Multibyte->new('GBK');
$gbk_length = $gbk->length($gbk_string);
=head1 DESCRIPTION
C<String::Multibyte::GBK> is used for manipulation of strings
in GBK (Guobiao Kuozhan).
Byte range of single-byte characters:
C<0x00..0x80>.
Leading byte range of double-byte characters:
C<0x81..0xFE>.
Trailing byte range of double-byte characters:
C<0x40..0x7E> and C<0x80..0xFE>.
Character order (invalid code points are excluded):
C<0x00..0x80>, C<0x8140..0xFEFE>.
=head1 CAVEAT
C<0x80> is supported in consideration of Microsoft's CP936.
(Hmmm, according to IANA Charset Registration for GBK,
GBK must be identical to CP936.)
=head1 SEE ALSO
L<String::Multibyte>
=cut