Function Perl_pv_escape 

pub unsafe fn Perl_pv_escape(
    my_perl: *mut PerlInterpreter,
    dsv: *mut SV,
    str_: *const c_char,
    count: STRLEN,
    max: STRLEN,
    escaped: *mut STRLEN,
    flags: U32,
) -> *mut c_char

thx shim for crate::Perl_pv_escape.