module mysql

// get_error_msg returns error message from MySQL instance.
fn get_error_msg(conn &C.MYSQL) string {
    return clone_mysql_cstring(C.mysql_error(conn))
}

// get_errno returns error number from MySQL instance.
fn get_errno(conn &C.MYSQL) int {
    return C.mysql_errno(conn)
}

// get_stmt_error_msg returns error message from a MySQL statement instance.
fn get_stmt_error_msg(stmt &C.MYSQL_STMT) string {
    return clone_mysql_cstring(&u8(C.mysql_stmt_error(stmt)))
}

// get_stmt_errno returns error number from a MySQL statement instance.
fn get_stmt_errno(stmt &C.MYSQL_STMT) int {
    return C.mysql_stmt_errno(stmt)
}

@[inline]
fn clone_mysql_cstring(ptr &u8) string {
    if isnil(ptr) {
        return ''
    }
    return unsafe { tos_clone(ptr) }
}

// resolve_nil_str returns an empty string if passed value is a nil pointer.
fn resolve_nil_str(ptr &u8) string {
    return clone_mysql_cstring(ptr)
}

@[inline]
fn mystring(b &u8) string {
    return clone_mysql_cstring(b)
}