https://metacpan.org/pod/Inline::C-Cookbook has lots of good examples. But I can't find an example on implementing a C function which takes a perl string (may contain binary characters such as \x00 in the string) and return another perl string (with binary characters).
In another word, the C function should have the similar syntax as the following perl function. sub myRepeat { my $str = shift; return $str . $str; } Thank in advance. perl101Coder