What is the following PERL script trying to accomplish?

sub mycode_string {
join(“”
map(‘$_ > 255 ?
sprintf(“\\x{%04x]”, $_) :
chr($_) = ~ /[[:cntrl:]]/ ?
sprintf(\\x%02X”, $_) :
chr($_)
} unpack(“u*”, $_[0]))l
}

A.
Convert hexadecimal to Unicode

B.
Display test as Unicode

C.
Convert hexadecimal to text

D.
Display Unicode as text

Explanation: