STATIC ICACHE_FLASH_ATTR mp_obj_t mod_esp_queue_test(mp_obj_t self_in, mp_obj_t add_obj) {
#if 1
    esp_queue_obj_t *self = self_in;
	if (self->items >= self->max_items) {
         nlr_raise(mp_obj_new_exception(&mp_type_Full));
    } 

    if (MP_OBJ_IS_TYPE(self->obj_instances[self->last],  &mp_type_list)) {
        printf("list type of list\n");
        if (!MP_OBJ_IS_TYPE(add_obj,  &mp_type_list)) {
            nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError, "pass a list only"));
        }
        mp_obj_list_t *in = (mp_obj_list_t *)add_obj;

        uint8_t vars[in->len];
        for (int ii = 0; ii < in->len; ii++) {
            vars[ii] = MP_OBJ_SMALL_INT_VALUE(in->items[ii]);
        }
        esp_queue_dalist_8(self, in->len, vars);
    } else if (MP_OBJ_IS_SMALL_INT(self->obj_instances[self->last])) {
        printf("smallint type of list\n");
        if (!MP_OBJ_IS_SMALL_INT(add_obj)) {
            nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError, "pass an int only"));
        }
        printf("is small int\n");
        esp_queue_daint_8(self, MP_OBJ_SMALL_INT_VALUE(add_obj));
    }
#endif
    return mp_const_none;
}

STATIC mp_obj_t socket_make_new(const mp_obj_type_t *type_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
    (void)type_in;
    (void)n_kw;

    int family = AF_INET;
    int type = SOCK_STREAM;
    int proto = 0;

    if (n_args > 0) {
        assert(MP_OBJ_IS_SMALL_INT(args[0]));
        family = MP_OBJ_SMALL_INT_VALUE(args[0]);
        if (n_args > 1) {
            assert(MP_OBJ_IS_SMALL_INT(args[1]));
            type = MP_OBJ_SMALL_INT_VALUE(args[1]);
            if (n_args > 2) {
                assert(MP_OBJ_IS_SMALL_INT(args[2]));
                proto = MP_OBJ_SMALL_INT_VALUE(args[2]);
            }
        }
    }

    int fd = socket(family, type, proto);
    RAISE_ERRNO(fd, errno);
    return MP_OBJ_FROM_PTR(socket_new(fd));
}

STATIC mp_obj_t mp_builtin_divmod(mp_obj_t o1_in, mp_obj_t o2_in) {
    if (MP_OBJ_IS_SMALL_INT(o1_in) && MP_OBJ_IS_SMALL_INT(o2_in)) {
        mp_small_int_t i1 = MP_OBJ_SMALL_INT_VALUE(o1_in);
        mp_small_int_t i2 = MP_OBJ_SMALL_INT_VALUE(o2_in);
        mp_obj_t args[2];
        args[0] = MP_OBJ_NEW_SMALL_INT(i1 / i2);
        args[1] = MP_OBJ_NEW_SMALL_INT(i1 % i2);
        return mp_obj_new_tuple(2, args);
    } else {
        nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "unsupported operand type(s) for divmod(): '%s' and '%s'", mp_obj_get_type_str(o1_in), mp_obj_get_type_str(o2_in)));
    }
}

// this function implements the '==' operator (and so the inverse of '!=')
// from the python language reference:
// "The objects need not have the same type. If both are numbers, they are converted
// to a common type. Otherwise, the == and != operators always consider objects of
// different types to be unequal."
// note also that False==0 and True==1 are true expressions
bool mp_obj_equal(mp_obj_t o1, mp_obj_t o2) {
    if (o1 == o2) {
        return true;
    }
    if (o1 == mp_const_none || o2 == mp_const_none) {
        return false;
    }

    // fast path for small ints
    if (MP_OBJ_IS_SMALL_INT(o1)) {
        if (MP_OBJ_IS_SMALL_INT(o2)) {
            // both SMALL_INT, and not equal if we get here
            return false;
        } else {
            mp_obj_t temp = o2; o2 = o1; o1 = temp;
            // o2 is now the SMALL_INT, o1 is not
            // fall through to generic op
        }
    }

    // fast path for strings
    if (MP_OBJ_IS_STR(o1)) {
        if (MP_OBJ_IS_STR(o2)) {
            // both strings, use special function
            return mp_obj_str_equal(o1, o2);
        } else {
            // a string is never equal to anything else
            return false;
        }
    } else if (MP_OBJ_IS_STR(o2)) {
        // o1 is not a string (else caught above), so the objects are not equal
        return false;
    }

    // generic type, call binary_op(MP_BINARY_OP_EQUAL)
    mp_obj_type_t *type = mp_obj_get_type(o1);
    if (type->binary_op != NULL) {
        mp_obj_t r = type->binary_op(MP_BINARY_OP_EQUAL, o1, o2);
        if (r != MP_OBJ_NULL) {
            return r == mp_const_true ? true : false;
        }
    }

    if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
        nlr_raise(mp_obj_new_exception_msg(&mp_type_NotImplementedError,
            "equality for given types not yet implemented"));
    } else {
        nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_NotImplementedError,
            "equality for '%s' and '%s' types not yet implemented",
            mp_obj_get_type_str(o1), mp_obj_get_type_str(o2)));
    }
}

mp_obj_t rt_unary_op(int op, mp_obj_t arg) {
    DEBUG_OP_printf("unary %d %p\n", op, arg);
    if (MP_OBJ_IS_SMALL_INT(arg)) {
        mp_small_int_t val = MP_OBJ_SMALL_INT_VALUE(arg);
        switch (op) {
            case RT_UNARY_OP_NOT: if (val != 0) { return mp_const_true;} else { return mp_const_false; }
            case RT_UNARY_OP_POSITIVE: break;
            case RT_UNARY_OP_NEGATIVE: val = -val; break;
            case RT_UNARY_OP_INVERT: val = ~val; break;
            default: assert(0); val = 0;
        }
        if (fit_small_int(val)) {
            return MP_OBJ_NEW_SMALL_INT(val);
        } else {
            // TODO make a bignum
            assert(0);
            return mp_const_none;
        }
    } else { // will be an object (small ints are caught in previous if)
        mp_obj_base_t *o = arg;
        if (o->type->unary_op != NULL) {
            mp_obj_t result = o->type->unary_op(op, arg);
            if (result != NULL) {
                return result;
            }
        }
        // TODO specify in error message what the operator is
        nlr_jump(mp_obj_new_exception_msg_1_arg(MP_QSTR_TypeError, "bad operand type for unary operator: '%s'", o->type->name));
    }
}

static int _socket_getaddrinfo2(const mp_obj_t host, const mp_obj_t portx, struct addrinfo **resp) {
    const struct addrinfo hints = {
        .ai_family = AF_INET,
        .ai_socktype = SOCK_STREAM,
    };

    mp_obj_t port = portx;
    if (MP_OBJ_IS_SMALL_INT(port)) {
        // This is perverse, because lwip_getaddrinfo promptly converts it back to an int, but
        // that's the API we have to work with ...
        port = mp_obj_str_binary_op(MP_BINARY_OP_MODULO, mp_obj_new_str_via_qstr("%s", 2), port);
    }

    const char *host_str = mp_obj_str_get_str(host);
    const char *port_str = mp_obj_str_get_str(port);

    if (host_str[0] == '\0') {
        // a host of "" is equivalent to the default/all-local IP address
        host_str = "0.0.0.0";
    }

    MP_THREAD_GIL_EXIT();
    int res = lwip_getaddrinfo(host_str, port_str, &hints, resp);
    MP_THREAD_GIL_ENTER();

    return res;
}

machine_int_t mp_obj_hash(mp_obj_t o_in) {
    if (o_in == mp_const_false) {
        return 0; // needs to hash to same as the integer 0, since False==0
    } else if (o_in == mp_const_true) {
        return 1; // needs to hash to same as the integer 1, since True==1
    } else if (MP_OBJ_IS_SMALL_INT(o_in)) {
        return MP_OBJ_SMALL_INT_VALUE(o_in);
    } else if (MP_OBJ_IS_STR(o_in)) {
        return mp_obj_str_get_hash(o_in);
    } else if (MP_OBJ_IS_TYPE(o_in, &mp_type_NoneType)) {
        return (machine_int_t)o_in;
    } else if (MP_OBJ_IS_TYPE(o_in, &mp_type_fun_native) || MP_OBJ_IS_TYPE(o_in, &mp_type_fun_bc)) {
        return (machine_int_t)o_in;
    } else if (MP_OBJ_IS_TYPE(o_in, &mp_type_tuple)) {
        return mp_obj_tuple_hash(o_in);
    } else if (MP_OBJ_IS_TYPE(o_in, &mp_type_type)) {
        return (machine_int_t)o_in;

    // TODO hash class and instances
    // TODO delegate to __hash__ method if it exists

    } else {
        nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "unhashable type: '%s'", mp_obj_get_type_str(o_in)));
    }
}

bool mp_obj_is_true(mp_obj_t arg) {
    if (arg == mp_const_false) {
        return 0;
    } else if (arg == mp_const_true) {
        return 1;
    } else if (arg == mp_const_none) {
        return 0;
    } else if (MP_OBJ_IS_SMALL_INT(arg)) {
        if (MP_OBJ_SMALL_INT_VALUE(arg) == 0) {
            return 0;
        } else {
            return 1;
        }
    } else {
        mp_obj_type_t *type = mp_obj_get_type(arg);
        if (type->unary_op != NULL) {
            mp_obj_t result = type->unary_op(MP_UNARY_OP_BOOL, arg);
            if (result != MP_OBJ_NULL) {
                return result == mp_const_true;
            }
        }

        mp_obj_t len = mp_obj_len_maybe(arg);
        if (len != MP_OBJ_NULL) {
            // obj has a length, truth determined if len != 0
            return len != MP_OBJ_NEW_SMALL_INT(0);
        } else {
            // any other obj is true per Python semantics
            return 1;
        }
    }
}

mp_obj_t mp_builtin_abs(mp_obj_t o_in) {
    if (MP_OBJ_IS_SMALL_INT(o_in)) {
        mp_small_int_t val = MP_OBJ_SMALL_INT_VALUE(o_in);
        if (val < 0) {
            val = -val;
        }
        return MP_OBJ_NEW_SMALL_INT(val);
#if MICROPY_ENABLE_FLOAT
    } else if (MP_OBJ_IS_TYPE(o_in, &mp_type_float)) {
        mp_float_t value = mp_obj_float_get(o_in);
        // TODO check for NaN etc
        if (value < 0) {
            return mp_obj_new_float(-value);
        } else {
            return o_in;
        }
    } else if (MP_OBJ_IS_TYPE(o_in, &mp_type_complex)) {
        mp_float_t real, imag;
        mp_obj_complex_get(o_in, &real, &imag);
        return mp_obj_new_float(MICROPY_FLOAT_C_FUN(sqrt)(real*real + imag*imag));
#endif
    } else {
        assert(0);
        return mp_const_none;
    }
}

// convert a Micro Python object to a sensible value for inline asm
machine_uint_t convert_obj_for_inline_asm(mp_obj_t obj) {
    // TODO for byte_array, pass pointer to the array
    if (MP_OBJ_IS_SMALL_INT(obj)) {
        return MP_OBJ_SMALL_INT_VALUE(obj);
    } else if (obj == mp_const_none) {
        return 0;
    } else if (obj == mp_const_false) {
        return 0;
    } else if (obj == mp_const_true) {
        return 1;
    } else if (MP_OBJ_IS_TYPE(obj, &str_type)) {
        // pointer to the string (it's probably constant though!)
        return (machine_uint_t)qstr_str(mp_obj_str_get(obj));
#if MICROPY_ENABLE_FLOAT
    } else if (MP_OBJ_IS_TYPE(obj, &float_type)) {
        // convert float to int (could also pass in float registers)
        return (machine_int_t)mp_obj_float_get(obj);
#endif
    } else if (MP_OBJ_IS_TYPE(obj, &tuple_type)) {
        // pointer to start of tuple (could pass length, but then could use len(x) for that)
        uint len;
        mp_obj_t *items;
        mp_obj_tuple_get(obj, &len, &items);
        return (machine_uint_t)items;
    } else if (MP_OBJ_IS_TYPE(obj, &list_type)) {
        // pointer to start of list (could pass length, but then could use len(x) for that)
        uint len;
        mp_obj_t *items;
        mp_obj_list_get(obj, &len, &items);
        return (machine_uint_t)items;
    } else {
        // just pass along a pointer to the object
        return (machine_uint_t)obj;
    }
}

void mp_obj_get_complex(mp_obj_t arg, mp_float_t *real, mp_float_t *imag) {
    if (arg == mp_const_false) {
        *real = 0;
        *imag = 0;
    } else if (arg == mp_const_true) {
        *real = 1;
        *imag = 0;
    } else if (MP_OBJ_IS_SMALL_INT(arg)) {
        *real = MP_OBJ_SMALL_INT_VALUE(arg);
        *imag = 0;
    } else if (MP_OBJ_IS_TYPE(arg, &mp_type_int)) {
        *real = mp_obj_int_as_float(arg);
        *imag = 0;
    } else if (mp_obj_is_float(arg)) {
        *real = mp_obj_float_get(arg);
        *imag = 0;
    } else if (MP_OBJ_IS_TYPE(arg, &mp_type_complex)) {
        mp_obj_complex_get(arg, real, imag);
    } else {
        if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
            nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError,
                "can't convert to complex"));
        } else {
            nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
                "can't convert %s to complex", mp_obj_get_type_str(arg)));
        }
    }
}

STATIC void mp_obj_exception_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind) {
    mp_obj_exception_t *o = MP_OBJ_TO_PTR(o_in);
    mp_print_kind_t k = kind & ~PRINT_EXC_SUBCLASS;
    bool is_subclass = kind & PRINT_EXC_SUBCLASS;
    if (!is_subclass && (k == PRINT_REPR || k == PRINT_EXC)) {
        mp_print_str(print, qstr_str(o->base.type->name));
    }

    if (k == PRINT_EXC) {
        mp_print_str(print, ": ");
    }

    if (k == PRINT_STR || k == PRINT_EXC) {
        if (o->args == NULL || o->args->len == 0) {
            mp_print_str(print, "");
            return;
        } else if (o->args->len == 1) {
            #if MICROPY_PY_UERRNO
            // try to provide a nice OSError error message
            if (o->base.type == &mp_type_OSError && MP_OBJ_IS_SMALL_INT(o->args->items[0])) {
                qstr qst = mp_errno_to_str(o->args->items[0]);
                if (qst != MP_QSTR_NULL) {
                    mp_printf(print, "[Errno %d] %q", MP_OBJ_SMALL_INT_VALUE(o->args->items[0]), qst);
                    return;
                }
            }
            #endif
            mp_obj_print_helper(print, o->args->items[0], PRINT_STR);
            return;
        }
    }
    mp_obj_tuple_print(print, MP_OBJ_FROM_PTR(o->args), kind);
}

// is_slice determines whether the index is a slice index
uint mp_get_index(const mp_obj_type_t *type, machine_uint_t len, mp_obj_t index, bool is_slice) {
    int i;
    if (MP_OBJ_IS_SMALL_INT(index)) {
        i = MP_OBJ_SMALL_INT_VALUE(index);
    } else if (MP_OBJ_IS_TYPE(index, &mp_type_bool)) {
        i = (index == mp_const_true ? 1 : 0);
    } else {
        nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "%s indices must be integers, not %s", qstr_str(type->name), mp_obj_get_type_str(index)));
    }

    if (i < 0) {
        i += len;
    }
    if (is_slice) {
        if (i < 0) {
            i = 0;
        } else if (i > len) {
            i = len;
        }
    } else {
        if (i < 0 || i >= len) {
            nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_IndexError, "%s index out of range", qstr_str(type->name)));
        }
    }
    return i;
}

bool ICACHE_FLASH_ATTR esp_queue_check_for_daint_8(esp_queue_obj_t *queue_in) {
    mp_obj_t *inst = queue_in->obj_instances[queue_in->last];
    if (!MP_OBJ_IS_SMALL_INT(inst)) {
        nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "not smallint"));
    } 
    return true;
}

mp_obj_t mp_obj_tuple_binary_op(int op, mp_obj_t lhs, mp_obj_t rhs) {
    mp_obj_tuple_t *o = lhs;
    switch (op) {
        case MP_BINARY_OP_ADD: {
            if (!mp_obj_is_subclass_fast(mp_obj_get_type(rhs), (mp_obj_t)&mp_type_tuple)) {
                return MP_OBJ_NULL; // op not supported
            }
            mp_obj_tuple_t *p = rhs;
            mp_obj_tuple_t *s = mp_obj_new_tuple(o->len + p->len, NULL);
            mp_seq_cat(s->items, o->items, o->len, p->items, p->len, mp_obj_t);
            return s;
        }
        case MP_BINARY_OP_MULTIPLY: {
            if (!MP_OBJ_IS_SMALL_INT(rhs)) {
                return MP_OBJ_NULL; // op not supported
            }
            int n = MP_OBJ_SMALL_INT_VALUE(rhs);
            mp_obj_tuple_t *s = mp_obj_new_tuple(o->len * n, NULL);
            mp_seq_multiply(o->items, sizeof(*o->items), o->len, n, s->items);
            return s;
        }
        case MP_BINARY_OP_EQUAL:
        case MP_BINARY_OP_LESS:
        case MP_BINARY_OP_LESS_EQUAL:
        case MP_BINARY_OP_MORE:
        case MP_BINARY_OP_MORE_EQUAL:
            return MP_BOOL(tuple_cmp_helper(op, lhs, rhs));

        default:
            return MP_OBJ_NULL; // op not supported
    }
}

// This function implements the '==' operator (and so the inverse of '!=').
//
// From the Python language reference:
// (https://docs.python.org/3/reference/expressions.html#not-in)
// "The objects need not have the same type. If both are numbers, they are converted
// to a common type. Otherwise, the == and != operators always consider objects of
// different types to be unequal."
//
// This means that False==0 and True==1 are true expressions.
//
// Furthermore, from the v3.4.2 code for object.c: "Practical amendments: If rich
// comparison returns NotImplemented, == and != are decided by comparing the object
// pointer."
bool mp_obj_equal(mp_obj_t o1, mp_obj_t o2) {
    if (o1 == o2) {
        return true;
    }
    if (o1 == mp_const_none || o2 == mp_const_none) {
        return false;
    }

    // fast path for small ints
    if (MP_OBJ_IS_SMALL_INT(o1)) {
        if (MP_OBJ_IS_SMALL_INT(o2)) {
            // both SMALL_INT, and not equal if we get here
            return false;
        } else {
            mp_obj_t temp = o2; o2 = o1; o1 = temp;
            // o2 is now the SMALL_INT, o1 is not
            // fall through to generic op
        }
    }

    // fast path for strings
    if (MP_OBJ_IS_STR(o1)) {
        if (MP_OBJ_IS_STR(o2)) {
            // both strings, use special function
            return mp_obj_str_equal(o1, o2);
        } else {
            // a string is never equal to anything else
            return false;
        }
    } else if (MP_OBJ_IS_STR(o2)) {
        // o1 is not a string (else caught above), so the objects are not equal
        return false;
    }

    // generic type, call binary_op(MP_BINARY_OP_EQUAL)
    mp_obj_type_t *type = mp_obj_get_type(o1);
    if (type->binary_op != NULL) {
        mp_obj_t r = type->binary_op(MP_BINARY_OP_EQUAL, o1, o2);
        if (r != MP_OBJ_NULL) {
            return r == mp_const_true ? true : false;
        }
    }

    // equality not implemented, and objects are not the same object, so
    // they are defined as not equal
    return false;
}

// this function implements the '==' operator (and so the inverse of '!=')
// from the python language reference:
// "The objects need not have the same type. If both are numbers, they are converted
// to a common type. Otherwise, the == and != operators always consider objects of
// different types to be unequal."
// note also that False==0 and True==1 are true expressions
bool mp_obj_equal(mp_obj_t o1, mp_obj_t o2) {
    if (o1 == o2) {
        return true;
    } else if (o1 == mp_const_none || o2 == mp_const_none) {
        return false;
    } else if (MP_OBJ_IS_SMALL_INT(o1) || MP_OBJ_IS_SMALL_INT(o2)) {
        if (MP_OBJ_IS_SMALL_INT(o1) && MP_OBJ_IS_SMALL_INT(o2)) {
            return false;
        } else {
            if (MP_OBJ_IS_SMALL_INT(o2)) {
                mp_obj_t temp = o1; o1 = o2; o2 = temp;
            }
            // o1 is the SMALL_INT, o2 is not
            mp_small_int_t val = MP_OBJ_SMALL_INT_VALUE(o1);
            if (o2 == mp_const_false) {
                return val == 0;
            } else if (o2 == mp_const_true) {
                return val == 1;
            } else if (MP_OBJ_IS_TYPE(o2, &mp_type_int)) {
                // If o2 is long int, dispatch to its virtual methods
                mp_obj_base_t *o = o2;
                if (o->type->binary_op != NULL) {
                    mp_obj_t r = o->type->binary_op(MP_BINARY_OP_EQUAL, o2, o1);
                    return r == mp_const_true ? true : false;
                }
            }
            return false;
        }
    } else if (MP_OBJ_IS_STR(o1) && MP_OBJ_IS_STR(o2)) {
        return mp_obj_str_equal(o1, o2);
    } else {
        mp_obj_base_t *o = o1;
        if (o->type->binary_op != NULL) {
            mp_obj_t r = o->type->binary_op(MP_BINARY_OP_EQUAL, o1, o2);
            if (r != MP_OBJ_NULL) {
                return r == mp_const_true ? true : false;
            }
        }

        nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_NotImplementedError,
            "Equality for '%s' and '%s' types not yet implemented", mp_obj_get_type_str(o1), mp_obj_get_type_str(o2)));
        return false;
    }
}

mp_obj_type_t *mp_obj_get_type(mp_obj_t o_in) {
    if (MP_OBJ_IS_SMALL_INT(o_in)) {
        return (mp_obj_t)&mp_type_int;
    } else if (MP_OBJ_IS_QSTR(o_in)) {
        return (mp_obj_t)&mp_type_str;
    } else {
        mp_obj_base_t *o = o_in;
        return (mp_obj_t)o->type;
    }
}

STATIC mp_obj_t fdfile_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
    mp_obj_fdfile_t *o = m_new_obj(mp_obj_fdfile_t);
    mp_const_obj_t type = type_in;

    const char *mode_s;
    if (n_args > 1) {
        mode_s = mp_obj_str_get_str(args[1]);
    } else {
        mode_s = "r";
    }

    int mode = 0;
    while (*mode_s) {
        switch (*mode_s++) {
            // Note: these assume O_RDWR = O_RDONLY | O_WRONLY
            case 'r':
                mode |= O_RDONLY;
                break;
            case 'w':
                mode |= O_WRONLY | O_CREAT | O_TRUNC;
                break;
            case 'a':
                mode |= O_APPEND;
                break;
            case '+':
                mode |= O_RDWR;
                break;
            #if MICROPY_PY_IO_FILEIO
            // If we don't have io.FileIO, then files are in text mode implicitly
            case 'b':
                type = &mp_type_fileio;
                break;
            case 't':
                type = &mp_type_textio;
                break;
            #endif
        }
    }

    o->base.type = type;

    if (MP_OBJ_IS_SMALL_INT(args[0])) {
        o->fd = MP_OBJ_SMALL_INT_VALUE(args[0]);
        return o;
    }

    const char *fname = mp_obj_str_get_str(args[0]);
    int fd = open(fname, mode, 0644);
    if (fd == -1) {
        nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(errno)));
    }
    o->fd = fd;
    return o;
}

STATIC mp_obj_t tuple_binary_op(int op, mp_obj_t lhs, mp_obj_t rhs) {
    mp_obj_tuple_t *o = lhs;
    switch (op) {
        case RT_BINARY_OP_SUBSCR:
        {
#if MICROPY_ENABLE_SLICE
            if (MP_OBJ_IS_TYPE(rhs, &slice_type)) {
                machine_uint_t start, stop;
                if (!m_seq_get_fast_slice_indexes(o->len, rhs, &start, &stop)) {
                    assert(0);
                }
                mp_obj_tuple_t *res = mp_obj_new_tuple(stop - start, NULL);
                m_seq_copy(res->items, o->items + start, res->len, mp_obj_t);
                return res;
            }
#endif
            uint index = mp_get_index(o->base.type, o->len, rhs);
            return o->items[index];
        }
        case RT_BINARY_OP_ADD:
        {
            if (!MP_OBJ_IS_TYPE(rhs, &tuple_type)) {
                return NULL;
            }
            mp_obj_tuple_t *p = rhs;
            mp_obj_tuple_t *s = mp_obj_new_tuple(o->len + p->len, NULL);
            m_seq_cat(s->items, o->items, o->len, p->items, p->len, mp_obj_t);
            return s;
        }
        case RT_BINARY_OP_MULTIPLY:
        {
            if (!MP_OBJ_IS_SMALL_INT(rhs)) {
                return NULL;
            }
            int n = MP_OBJ_SMALL_INT_VALUE(rhs);
            mp_obj_tuple_t *s = mp_obj_new_tuple(o->len * n, NULL);
            mp_seq_multiply(o->items, sizeof(*o->items), o->len, n, s->items);
            return s;
        }
        case RT_BINARY_OP_EQUAL:
        case RT_BINARY_OP_LESS:
        case RT_BINARY_OP_LESS_EQUAL:
        case RT_BINARY_OP_MORE:
        case RT_BINARY_OP_MORE_EQUAL:
            return MP_BOOL(tuple_cmp_helper(op, lhs, rhs));
        case RT_BINARY_OP_NOT_EQUAL:
            return MP_BOOL(!tuple_cmp_helper(RT_BINARY_OP_EQUAL, lhs, rhs));

        default:
            // op not supported
            return NULL;
    }
}