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package Cname;
our $Evil='A';
sub translator {
my $str = shift;
if ( $str eq 'EVIL' ) {
# Returns A first time, AB second, ABC third ... A-ZA the 27th time.
(my $c=substr("A".$Evil,-1))++;
my $r=$Evil;
$Evil.=$c;
return $r;
}
if ( $str eq 'EMPTY-STR') {
return "";
}
if ( $str eq 'NULL') {
return "\0";
}
if ( $str eq 'LONG-STR') {
return 'A' x 255;
}
# Should exceed limit for regex \N bytes in a sequence. Anyway it will if
# UCHAR_MAX is 255.
if ( $str eq 'TOO-LONG-STR') {
return 'A' x 256;
}
return $str;
}
sub import {
shift;
$^H{charnames} = \&translator;
}
1;
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