Print date

error_type process_date(DateHandle* obj, int nested) {
    integer_type year = 0;
    integer_type month = 0;
    integer_type day = 0;
    integer_type hour = 0;
    integer_type minute = 0;
    integer_type second = 0;
    TimezoneType timezone;
    integer_type hour_offset = 0;
    integer_type minute_offset = 0;

    print_spaces(nested);
    printf("Date begin\n");

    RETURN_ERROR_IF_NOT_SUCCESS(Date_GetYear(obj, &year));
    RETURN_ERROR_IF_NOT_SUCCESS(Date_GetMonth(obj, &month));
    RETURN_ERROR_IF_NOT_SUCCESS(Date_GetDay(obj, &day));
    RETURN_ERROR_IF_NOT_SUCCESS(Date_GetHour(obj, &hour));
    RETURN_ERROR_IF_NOT_SUCCESS(Date_GetMinute(obj, &minute));
    RETURN_ERROR_IF_NOT_SUCCESS(Date_GetSecond(obj, &second));
    RETURN_ERROR_IF_NOT_SUCCESS(Date_GetTimezone(obj, &timezone));
    RETURN_ERROR_IF_NOT_SUCCESS(Date_GetHourOffset(obj, &hour_offset));
    RETURN_ERROR_IF_NOT_SUCCESS(Date_GetMinuteOffset(obj, &minute_offset));

    print_spaces(nested + 1);
    if (timezone == TimezoneType_UTC) {
        printf("%04d-%02d-%02d %02d:%02d:%02dZ\n",
            year, month, day,
            hour, minute, second);
    } else {
        char timezone_character;
        if (timezone == TimezoneType_Later) {
            timezone_character = '+';
        } else if (timezone == TimezoneType_Earlier) {
            timezone_character = '-';
        } else {
            printf("Timezone is neither UTC, Earlier nor later\n");
            return VANILLAPDF_TEST_ERROR_FAILURE;
        }

        printf("%04d-%02d-%02d %02d:%02d:%02d %c%02d:%02d\n",
            year, month, day,
            hour, minute, second,
            timezone_character, hour_offset, minute_offset);
    }

    print_spaces(nested);
    printf("Date end\n");

    return VANILLAPDF_TEST_ERROR_SUCCESS;
}