Function sv_cat_decode 

pub unsafe fn sv_cat_decode(
    my_perl: *mut PerlInterpreter,
    a: *mut SV,
    b: *mut SV,
    c: *mut SV,
    d: *mut c_int,
    e: *mut c_char,
    f: c_int,
) -> bool

thx shim for crate::sv_cat_decode.