Pathname#has_trailing_separator?

static VALUE
has_trailing_separator(VALUE self, VALUE path)
{
    rb_len_t baselen, alllen = RSTRING_LEN(check_strpath(path));
    if (alllen <= 0) return Qfalse;
    rb_encoding *enc = rb_enc_get(path);
    const char *name = RSTRING_PTR(path);
    const char *base = ruby_enc_find_basename(name, &baselen, &alllen, enc);
    if (baselen < 1) return Qfalse;
    if (baselen == 1 && isdirsep(*base)) return Qfalse;
    return RBOOL(base + alllen < RSTRING_END(path));
}