File Coverage

blib/lib/String/Multibyte/Big5.pm

Criterion	Covered	Total	%
statement	3	3	100.0
branch			n/a
condition			n/a
subroutine	1	1	100.0
pod			n/a
total	4	4	100.0

package String::Multibyte::Big5;

use vars qw($VERSION);
$VERSION = '1.02';

+{
    charset  => 'Big-5',

    regexp   => '(?:[\x00-\x7F]|[\x81-\xFE][\x40-\x7E\xA1-\xFE])',

    cmpchar => sub { $_[0] cmp $_[1] },

    nextchar => sub {
	my $ch = shift;
	my $len = length $ch;
	if ($len < 1 || 2 < $len) {
	    return undef;
	}
	elsif ($len == 1) {
	    return $ch eq "\x7F"
		? "\x81\x40"
		: chr(ord($ch)+1);
	}
	else {
	    my($c, $d) = unpack('CC', $ch);
	    return $ch eq "\xFE\xFE"
		? undef
		: $d == 0xFE
		    ? chr($c+1)."\x40"
		    : $d == 0x7E
			? chr($c)."\xA1"
			: pack('CC', $c, $d+1);
	}
    },
};

__END__