Hello Monks, Can anyone tell me why the following code:

#!/usr/bin/perl

#$test = "\x{05D0}\x{20AC}";
#$test = "\xd7\x90\xe2\x82\xac";
#$test = "\x05\xD0\x20\xAC";
$test = '®';
#$test = "\x{c2ae}";

$unpacked = unpack('H*',$test);

print("string: $test\n");
print("unpacked: $unpacked\n");
print("char length: " . length($test) . "\n");
print("byte length: " . getByteLength($test) . "\n");

sub getByteLength
{
    my ($string) = @_;
    use Encode qw(encode decode);
    $binaryString = encode('UTF-8', $string);
    my $byteLength = length($binaryString);
    return $byteLength;
}

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produces the following output:

string: ®
unpacked: c2ae
char length: 2
byte length: 4

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Why is the char-length (which should be 1) getting the byte-length (which should be 2) and why is the byte-length reporting 4 bytes, when upacked it is clearly 2 bytes? Which one of these things is not functioning correctly?

On a related note, what is the difference between: 
$test = "\x{05D0}\x{20AC}";

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and

$test = "\x05\xD0\x20\xAC"

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It seems that the second instance is putting in the actual hex bytes, because the following code produces the same output as the first thing above (with the squiggly brackets):

$test = "\xd7\x90\xe2\x82\xac";

[download]

In reply to UTF-8 representation question by bpa

Title:
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