getter for invoice type

getter.c

GncInvoiceType
gnc_invoice_get_type(InvoiceWindow *iw)
{
    /* uses the same approach as gnc_invoice_get_title */
    switch (gncOwnerGetType(&iw->owner))
    {
    case GNC_OWNER_CUSTOMER:
        return iw->is_credit_note ? GNC_INVOICE_CUST_CREDIT_NOTE
                                  : GNC_INVOICE_CUST_INVOICE;
        break;
    case GNC_OWNER_VENDOR:
        return iw->is_credit_note ? GNC_INVOICE_VEND_CREDIT_NOTE
                                  : GNC_INVOICE_VEND_INVOICE;
        break;
    case GNC_OWNER_EMPLOYEE:
        return iw->is_credit_note ? GNC_INVOICE_EMPL_CREDIT_NOTE
                                  : GNC_INVOICE_EMPL_INVOICE;
        break;
    default:
        return GNC_INVOICE_UNDEFINED;
        break;
    }
}