/*
 * This file is part of the MicroPython project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2013, 2014 Damien P. George
 * Copyright (c) 2014 Paul Sokolovsky
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include <string.h>
#include <assert.h>
#include <stdint.h>

#include "py/runtime.h"
#include "py/binary.h"
#include "py/objstr.h"
#include "py/objarray.h"

#if MICROPY_PY_ARRAY || MICROPY_PY_BUILTINS_BYTEARRAY || MICROPY_PY_BUILTINS_MEMORYVIEW

// About memoryview object: We want to reuse as much code as possible from
// array, and keep the memoryview object 4 words in size so it fits in 1 GC
// block. Also, memoryview must keep a pointer to the base of the buffer so
// that the buffer is not GC'd if the original parent object is no longer
// around (we are assuming that all memoryview'able objects return a pointer
// which points to the start of a GC chunk). Given the above constraints we
// do the following:
// - typecode high bit is set if the buffer is read-write (else read-only)
// - free is the offset in elements to the first item in the memoryview
// - len is the length in elements
// - items points to the start of the original buffer
// Note that we don't handle the case where the original buffer might change
// size due to a resize of the original parent object.

#if MICROPY_PY_BUILTINS_MEMORYVIEW
#define TYPECODE_MASK (0x7f)
#define memview_offset free
#else
// make (& TYPECODE_MASK) a null operation if memorview not enabled
#define TYPECODE_MASK (~(size_t)0)
// memview_offset should not be accessed if memoryview is not enabled,
// so not defined to catch errors
#endif

STATIC mp_obj_t array_iterator_new(mp_obj_t array_in, mp_obj_iter_buf_t *iter_buf);
STATIC mp_obj_t array_append(mp_obj_t self_in, mp_obj_t arg);
STATIC mp_obj_t array_extend(mp_obj_t self_in, mp_obj_t arg_in);
STATIC mp_int_t array_get_buffer(mp_obj_t o_in, mp_buffer_info_t *bufinfo, mp_uint_t flags);

/******************************************************************************/
// array

#if MICROPY_PY_BUILTINS_BYTEARRAY || MICROPY_PY_ARRAY
STATIC void array_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind) {
 (void)kind;
 mp_obj_array_t *o = MP_OBJ_TO_PTR(o_in);
 if (o->typecode == BYTEARRAY_TYPECODE) {
 mp_print_str(print, "bytearray(b");
 mp_str_print_quoted(print, o->items, o->len, true);
 } else {
 mp_printf(print, "array('%c'", o->typecode);
 if (o->len > 0) {
 mp_print_str(print, ", [");
 for (size_t i = 0; i < o->len; i++) {
 if (i > 0) {
 mp_print_str(print, ", ");
 }
 mp_obj_print_helper(print, mp_binary_get_val_array(o->typecode, o->items, i), PRINT_REPR);
 }
 mp_print_str(print, "]");
 }
 }
 mp_print_str(print, ")");
}
#endif

#if MICROPY_PY_BUILTINS_BYTEARRAY || MICROPY_PY_ARRAY
STATIC mp_obj_array_t *array_new(char typecode, size_t n) {
 int typecode_size = mp_binary_get_size('@', typecode, NULL);
 mp_obj_array_t *o = m_new_obj(mp_obj_array_t);
 #if MICROPY_PY_BUILTINS_BYTEARRAY && MICROPY_PY_ARRAY
 o->base.type = (typecode == BYTEARRAY_TYPECODE) ? &mp_type_bytearray : &mp_type_array;
 #elif MICROPY_PY_BUILTINS_BYTEARRAY
 o->base.type = &mp_type_bytearray;
 #else
 o->base.type = &mp_type_array;
 #endif
 o->typecode = typecode;
 o->free = 0;
 o->len = n;
 o->items = m_new(byte, typecode_size * o->len);
 return o;
}
#endif

#if MICROPY_PY_BUILTINS_BYTEARRAY || MICROPY_PY_ARRAY
STATIC mp_obj_t array_construct(char typecode, mp_obj_t initializer) {
 // bytearrays can be raw-initialised from anything with the buffer protocol
 // other arrays can only be raw-initialised from bytes and bytearray objects
 mp_buffer_info_t bufinfo;
 if (((MICROPY_PY_BUILTINS_BYTEARRAY
 && typecode == BYTEARRAY_TYPECODE)
 || (MICROPY_PY_ARRAY
 && (mp_obj_is_type(initializer, &mp_type_bytes)
 || (MICROPY_PY_BUILTINS_BYTEARRAY && mp_obj_is_type(initializer, &mp_type_bytearray)))))
 && mp_get_buffer(initializer, &bufinfo, MP_BUFFER_READ)) {
 // construct array from raw bytes
 // we round-down the len to make it a multiple of sz (CPython raises error)
 size_t sz = mp_binary_get_size('@', typecode, NULL);
 size_t len = bufinfo.len / sz;
 mp_obj_array_t *o = array_new(typecode, len);
 memcpy(o->items, bufinfo.buf, len * sz);
 return MP_OBJ_FROM_PTR(o);
 }

 size_t len;
 // Try to create array of exact len if initializer len is known
 mp_obj_t len_in = mp_obj_len_maybe(initializer);
 if (len_in == MP_OBJ_NULL) {
 len = 0;
 } else {
 len = MP_OBJ_SMALL_INT_VALUE(len_in);
 }

 mp_obj_array_t *array = array_new(typecode, len);

 mp_obj_t iterable = mp_getiter(initializer, NULL);
 mp_obj_t item;
 size_t i = 0;
 while ((item = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
 if (len == 0) {
 array_append(MP_OBJ_FROM_PTR(array), item);
 } else {
 mp_binary_set_val_array(typecode, array->items, i++, item);
 }
 }

 return MP_OBJ_FROM_PTR(array);
}
#endif

#if MICROPY_PY_ARRAY
STATIC mp_obj_t array_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;
 mp_arg_check_num(n_args, n_kw, 1, 2, false);

 // get typecode
 const char *typecode = mp_obj_str_get_str(args[0]);

 if (n_args == 1) {
 // 1 arg: make an empty array
 return MP_OBJ_FROM_PTR(array_new(*typecode, 0));
 } else {
 // 2 args: construct the array from the given object
 return array_construct(*typecode, args[1]);
 }
}
#endif

#if MICROPY_PY_BUILTINS_BYTEARRAY
STATIC mp_obj_t bytearray_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;
 // Can take 2nd/3rd arg if constructs from str
 mp_arg_check_num(n_args, n_kw, 0, 3, false);

 if (n_args == 0) {
 // no args: construct an empty bytearray
 return MP_OBJ_FROM_PTR(array_new(BYTEARRAY_TYPECODE, 0));
 } else if (mp_obj_is_int(args[0])) {
 // 1 arg, an integer: construct a blank bytearray of that length
 mp_uint_t len = mp_obj_get_int(args[0]);
 mp_obj_array_t *o = array_new(BYTEARRAY_TYPECODE, len);
 memset(o->items, 0, len);
 return MP_OBJ_FROM_PTR(o);
 } else {
 // 1 arg: construct the bytearray from that
 return array_construct(BYTEARRAY_TYPECODE, args[0]);
 }
}
#endif

#if MICROPY_PY_BUILTINS_MEMORYVIEW

mp_obj_t mp_obj_new_memoryview(byte typecode, size_t nitems, void *items) {
 mp_obj_array_t *self = m_new_obj(mp_obj_array_t);
 self->base.type = &mp_type_memoryview;
 self->typecode = typecode;
 self->memview_offset = 0;
 self->len = nitems;
 self->items = items;
 return MP_OBJ_FROM_PTR(self);
}

STATIC mp_obj_t memoryview_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;

 // TODO possibly allow memoryview constructor to take start/stop so that one
 // can do memoryview(b, 4, 8) instead of memoryview(b)[4:8] (uses less RAM)

 mp_arg_check_num(n_args, n_kw, 1, 1, false);

 mp_buffer_info_t bufinfo;
 mp_get_buffer_raise(args[0], &bufinfo, MP_BUFFER_READ);

 mp_obj_array_t *self = MP_OBJ_TO_PTR(mp_obj_new_memoryview(bufinfo.typecode,
 bufinfo.len / mp_binary_get_size('@', bufinfo.typecode, NULL),
 bufinfo.buf));

 // test if the object can be written to
 if (mp_get_buffer(args[0], &bufinfo, MP_BUFFER_RW)) {
 self->typecode |= MP_OBJ_ARRAY_TYPECODE_FLAG_RW; // indicate writable buffer
 }

 return MP_OBJ_FROM_PTR(self);
}

#if MICROPY_PY_BUILTINS_MEMORYVIEW_ITEMSIZE
STATIC void memoryview_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
 if (dest[0] != MP_OBJ_NULL) {
 return;
 }
 if (attr == MP_QSTR_itemsize) {
 mp_obj_array_t *self = MP_OBJ_TO_PTR(self_in);
 dest[0] = MP_OBJ_NEW_SMALL_INT(mp_binary_get_size('@', self->typecode & TYPECODE_MASK, NULL));
 }
}
#endif

#endif

STATIC mp_obj_t array_unary_op(mp_unary_op_t op, mp_obj_t o_in) {
 mp_obj_array_t *o = MP_OBJ_TO_PTR(o_in);
 switch (op) {
 case MP_UNARY_OP_BOOL:
 return mp_obj_new_bool(o->len != 0);
 case MP_UNARY_OP_LEN:
 return MP_OBJ_NEW_SMALL_INT(o->len);
 default:
 return MP_OBJ_NULL; // op not supported
 }
}

STATIC mp_obj_t array_binary_op(mp_binary_op_t op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
 mp_obj_array_t *lhs = MP_OBJ_TO_PTR(lhs_in);
 switch (op) {
 case MP_BINARY_OP_ADD: {
 // allow to add anything that has the buffer protocol (extension to CPython)
 mp_buffer_info_t lhs_bufinfo;
 mp_buffer_info_t rhs_bufinfo;
 array_get_buffer(lhs_in, &lhs_bufinfo, MP_BUFFER_READ);
 mp_get_buffer_raise(rhs_in, &rhs_bufinfo, MP_BUFFER_READ);

 size_t sz = mp_binary_get_size('@', lhs_bufinfo.typecode, NULL);

 // convert byte count to element count (in case rhs is not multiple of sz)
 size_t rhs_len = rhs_bufinfo.len / sz;

 // note: lhs->len is element count of lhs, lhs_bufinfo.len is byte count
 mp_obj_array_t *res = array_new(lhs_bufinfo.typecode, lhs->len + rhs_len);
 mp_seq_cat((byte *)res->items, lhs_bufinfo.buf, lhs_bufinfo.len, rhs_bufinfo.buf, rhs_len * sz, byte);
 return MP_OBJ_FROM_PTR(res);
 }

 case MP_BINARY_OP_INPLACE_ADD: {
 #if MICROPY_PY_BUILTINS_MEMORYVIEW
 if (lhs->base.type == &mp_type_memoryview) {
 return MP_OBJ_NULL; // op not supported
 }
 #endif
 array_extend(lhs_in, rhs_in);
 return lhs_in;
 }

 case MP_BINARY_OP_CONTAINS: {
 #if MICROPY_PY_BUILTINS_BYTEARRAY
 // Can search string only in bytearray
 mp_buffer_info_t lhs_bufinfo;
 mp_buffer_info_t rhs_bufinfo;
 if (mp_get_buffer(rhs_in, &rhs_bufinfo, MP_BUFFER_READ)) {
 if (!mp_obj_is_type(lhs_in, &mp_type_bytearray)) {
 return mp_const_false;
 }
 array_get_buffer(lhs_in, &lhs_bufinfo, MP_BUFFER_READ);
 return mp_obj_new_bool(
 find_subbytes(lhs_bufinfo.buf, lhs_bufinfo.len, rhs_bufinfo.buf, rhs_bufinfo.len, 1) != NULL);
 }
 #endif

 // Otherwise, can only look for a scalar numeric value in an array
 if (mp_obj_is_int(rhs_in) || mp_obj_is_float(rhs_in)) {
 mp_raise_NotImplementedError(NULL);
 }

 return mp_const_false;
 }

 case MP_BINARY_OP_EQUAL: {
 mp_buffer_info_t lhs_bufinfo;
 mp_buffer_info_t rhs_bufinfo;
 array_get_buffer(lhs_in, &lhs_bufinfo, MP_BUFFER_READ);
 if (!mp_get_buffer(rhs_in, &rhs_bufinfo, MP_BUFFER_READ)) {
 return mp_const_false;
 }
 return mp_obj_new_bool(mp_seq_cmp_bytes(op, lhs_bufinfo.buf, lhs_bufinfo.len, rhs_bufinfo.buf, rhs_bufinfo.len));
 }

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

#if MICROPY_PY_BUILTINS_BYTEARRAY || MICROPY_PY_ARRAY
STATIC mp_obj_t array_append(mp_obj_t self_in, mp_obj_t arg) {
 // self is not a memoryview, so we don't need to use (& TYPECODE_MASK)
 assert((MICROPY_PY_BUILTINS_BYTEARRAY && mp_obj_is_type(self_in, &mp_type_bytearray))
 || (MICROPY_PY_ARRAY && mp_obj_is_type(self_in, &mp_type_array)));
 mp_obj_array_t *self = MP_OBJ_TO_PTR(self_in);

 if (self->free == 0) {
 size_t item_sz = mp_binary_get_size('@', self->typecode, NULL);
 // TODO: alloc policy
 self->free = 8;
 self->items = m_renew(byte, self->items, item_sz * self->len, item_sz * (self->len + self->free));
 mp_seq_clear(self->items, self->len + 1, self->len + self->free, item_sz);
 }
 mp_binary_set_val_array(self->typecode, self->items, self->len, arg);
 // only update length/free if set succeeded
 self->len++;
 self->free--;
 return mp_const_none; // return None, as per CPython
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(array_append_obj, array_append);

STATIC mp_obj_t array_extend(mp_obj_t self_in, mp_obj_t arg_in) {
 // self is not a memoryview, so we don't need to use (& TYPECODE_MASK)
 assert((MICROPY_PY_BUILTINS_BYTEARRAY && mp_obj_is_type(self_in, &mp_type_bytearray))
 || (MICROPY_PY_ARRAY && mp_obj_is_type(self_in, &mp_type_array)));
 mp_obj_array_t *self = MP_OBJ_TO_PTR(self_in);

 // allow to extend by anything that has the buffer protocol (extension to CPython)
 mp_buffer_info_t arg_bufinfo;
 mp_get_buffer_raise(arg_in, &arg_bufinfo, MP_BUFFER_READ);

 size_t sz = mp_binary_get_size('@', self->typecode, NULL);

 // convert byte count to element count
 size_t len = arg_bufinfo.len / sz;

 // make sure we have enough room to extend
 // TODO: alloc policy; at the moment we go conservative
 if (self->free < len) {
 self->items = m_renew(byte, self->items, (self->len + self->free) * sz, (self->len + len) * sz);
 self->free = 0;
 } else {
 self->free -= len;
 }

 // extend
 mp_seq_copy((byte *)self->items + self->len * sz, arg_bufinfo.buf, len * sz, byte);
 self->len += len;

 return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(array_extend_obj, array_extend);
#endif

STATIC mp_obj_t array_subscr(mp_obj_t self_in, mp_obj_t index_in, mp_obj_t value) {
 if (value == MP_OBJ_NULL) {
 // delete item
 // TODO implement
 // TODO: confirmed that both bytearray and array.array support
 // slice deletion
 return MP_OBJ_NULL; // op not supported
 } else {
 mp_obj_array_t *o = MP_OBJ_TO_PTR(self_in);
 #if MICROPY_PY_BUILTINS_SLICE
 if (mp_obj_is_type(index_in, &mp_type_slice)) {
 mp_bound_slice_t slice;
 if (!mp_seq_get_fast_slice_indexes(o->len, index_in, &slice)) {
 mp_raise_NotImplementedError(MP_ERROR_TEXT("only slices with step=1 (aka None) are supported"));
 }
 if (value != MP_OBJ_SENTINEL) {
 #if MICROPY_PY_ARRAY_SLICE_ASSIGN
 // Assign
 size_t src_len;
 void *src_items;
 size_t item_sz = mp_binary_get_size('@', o->typecode & TYPECODE_MASK, NULL);
 if (mp_obj_is_obj(value) && ((mp_obj_base_t *)MP_OBJ_TO_PTR(value))->type->subscr == array_subscr) {
 // value is array, bytearray or memoryview
 mp_obj_array_t *src_slice = MP_OBJ_TO_PTR(value);
 if (item_sz != mp_binary_get_size('@', src_slice->typecode & TYPECODE_MASK, NULL)) {
 compat_error:
 mp_raise_ValueError(MP_ERROR_TEXT("lhs and rhs should be compatible"));
 }
 src_len = src_slice->len;
 src_items = src_slice->items;
 #if MICROPY_PY_BUILTINS_MEMORYVIEW
 if (mp_obj_is_type(value, &mp_type_memoryview)) {
 src_items = (uint8_t *)src_items + (src_slice->memview_offset * item_sz);
 }
 #endif
 } else if (mp_obj_is_type(value, &mp_type_bytes)) {
 if (item_sz != 1) {
 goto compat_error;
 }
 mp_buffer_info_t bufinfo;
 mp_get_buffer_raise(value, &bufinfo, MP_BUFFER_READ);
 src_len = bufinfo.len;
 src_items = bufinfo.buf;
 } else {
 mp_raise_NotImplementedError(MP_ERROR_TEXT("array/bytes required on right side"));
 }

 // TODO: check src/dst compat
 mp_int_t len_adj = src_len - (slice.stop - slice.start);
 uint8_t *dest_items = o->items;
 #if MICROPY_PY_BUILTINS_MEMORYVIEW
 if (o->base.type == &mp_type_memoryview) {
 if (!(o->typecode & MP_OBJ_ARRAY_TYPECODE_FLAG_RW)) {
 // store to read-only memoryview not allowed
 return MP_OBJ_NULL;
 }
 if (len_adj != 0) {
 goto compat_error;
 }
 dest_items += o->memview_offset * item_sz;
 }
 #endif
 if (len_adj > 0) {
 if ((size_t)len_adj > o->free) {
 // TODO: alloc policy; at the moment we go conservative
 o->items = m_renew(byte, o->items, (o->len + o->free) * item_sz, (o->len + len_adj) * item_sz);
 o->free = len_adj;
 dest_items = o->items;
 }
 mp_seq_replace_slice_grow_inplace(dest_items, o->len,
 slice.start, slice.stop, src_items, src_len, len_adj, item_sz);
 } else {
 mp_seq_replace_slice_no_grow(dest_items, o->len,
 slice.start, slice.stop, src_items, src_len, item_sz);
 // Clear "freed" elements at the end of list
 // TODO: This is actually only needed for typecode=='O'
 mp_seq_clear(dest_items, o->len + len_adj, o->len, item_sz);
 // TODO: alloc policy after shrinking
 }
 o->free -= len_adj;
 o->len += len_adj;
 return mp_const_none;
 #else
 return MP_OBJ_NULL; // op not supported
 #endif
 }

 mp_obj_array_t *res;
 size_t sz = mp_binary_get_size('@', o->typecode & TYPECODE_MASK, NULL);
 assert(sz > 0);
 #if MICROPY_PY_BUILTINS_MEMORYVIEW
 if (o->base.type == &mp_type_memoryview) {
 res = m_new_obj(mp_obj_array_t);
 *res = *o;
 res->memview_offset += slice.start;
 res->len = slice.stop - slice.start;
 } else
 #endif
 {
 res = array_new(o->typecode, slice.stop - slice.start);
 memcpy(res->items, (uint8_t *)o->items + slice.start * sz, (slice.stop - slice.start) * sz);
 }
 return MP_OBJ_FROM_PTR(res);
 } else
 #endif
 {
 size_t index = mp_get_index(o->base.type, o->len, index_in, false);
 #if MICROPY_PY_BUILTINS_MEMORYVIEW
 if (o->base.type == &mp_type_memoryview) {
 index += o->memview_offset;
 if (value != MP_OBJ_SENTINEL && !(o->typecode & MP_OBJ_ARRAY_TYPECODE_FLAG_RW)) {
 // store to read-only memoryview
 return MP_OBJ_NULL;
 }
 }
 #endif
 if (value == MP_OBJ_SENTINEL) {
 // load
 return mp_binary_get_val_array(o->typecode & TYPECODE_MASK, o->items, index);
 } else {
 // store
 mp_binary_set_val_array(o->typecode & TYPECODE_MASK, o->items, index, value);
 return mp_const_none;
 }
 }
 }
}

STATIC mp_int_t array_get_buffer(mp_obj_t o_in, mp_buffer_info_t *bufinfo, mp_uint_t flags) {
 mp_obj_array_t *o = MP_OBJ_TO_PTR(o_in);
 size_t sz = mp_binary_get_size('@', o->typecode & TYPECODE_MASK, NULL);
 bufinfo->buf = o->items;
 bufinfo->len = o->len * sz;
 bufinfo->typecode = o->typecode & TYPECODE_MASK;
 #if MICROPY_PY_BUILTINS_MEMORYVIEW
 if (o->base.type == &mp_type_memoryview) {
 if (!(o->typecode & MP_OBJ_ARRAY_TYPECODE_FLAG_RW) && (flags & MP_BUFFER_WRITE)) {
 // read-only memoryview
 return 1;
 }
 bufinfo->buf = (uint8_t *)bufinfo->buf + (size_t)o->memview_offset * sz;
 }
 #else
 (void)flags;
 #endif
 return 0;
}

#if MICROPY_PY_BUILTINS_BYTEARRAY || MICROPY_PY_ARRAY
STATIC const mp_rom_map_elem_t array_locals_dict_table[] = {
 { MP_ROM_QSTR(MP_QSTR_append), MP_ROM_PTR(&array_append_obj) },
 { MP_ROM_QSTR(MP_QSTR_extend), MP_ROM_PTR(&array_extend_obj) },
 #if MICROPY_CPYTHON_COMPAT
 { MP_ROM_QSTR(MP_QSTR_decode), MP_ROM_PTR(&bytes_decode_obj) },
 #endif
};

STATIC MP_DEFINE_CONST_DICT(array_locals_dict, array_locals_dict_table);
#endif

#if MICROPY_PY_ARRAY
const mp_obj_type_t mp_type_array = {
 { &mp_type_type },
 .name = MP_QSTR_array,
 .print = array_print,
 .make_new = array_make_new,
 .getiter = array_iterator_new,
 .unary_op = array_unary_op,
 .binary_op = array_binary_op,
 .subscr = array_subscr,
 .buffer_p = { .get_buffer = array_get_buffer },
 .locals_dict = (mp_obj_dict_t *)&array_locals_dict,
};
#endif

#if MICROPY_PY_BUILTINS_BYTEARRAY
const mp_obj_type_t mp_type_bytearray = {
 { &mp_type_type },
 .flags = MP_TYPE_FLAG_EQ_CHECKS_OTHER_TYPE,
 .name = MP_QSTR_bytearray,
 .print = array_print,
 .make_new = bytearray_make_new,
 .getiter = array_iterator_new,
 .unary_op = array_unary_op,
 .binary_op = array_binary_op,
 .subscr = array_subscr,
 .buffer_p = { .get_buffer = array_get_buffer },
 .locals_dict = (mp_obj_dict_t *)&array_locals_dict,
};
#endif

#if MICROPY_PY_BUILTINS_MEMORYVIEW
const mp_obj_type_t mp_type_memoryview = {
 { &mp_type_type },
 .flags = MP_TYPE_FLAG_EQ_CHECKS_OTHER_TYPE,
 .name = MP_QSTR_memoryview,
 .make_new = memoryview_make_new,
 .getiter = array_iterator_new,
 .unary_op = array_unary_op,
 .binary_op = array_binary_op,
 #if MICROPY_PY_BUILTINS_MEMORYVIEW_ITEMSIZE
 .attr = memoryview_attr,
 #endif
 .subscr = array_subscr,
 .buffer_p = { .get_buffer = array_get_buffer },
};
#endif

/* unused
size_t mp_obj_array_len(mp_obj_t self_in) {
 return ((mp_obj_array_t *)self_in)->len;
}
*/

#if MICROPY_PY_BUILTINS_BYTEARRAY
mp_obj_t mp_obj_new_bytearray(size_t n, void *items) {
 mp_obj_array_t *o = array_new(BYTEARRAY_TYPECODE, n);
 memcpy(o->items, items, n);
 return MP_OBJ_FROM_PTR(o);
}

// Create bytearray which references specified memory area
mp_obj_t mp_obj_new_bytearray_by_ref(size_t n, void *items) {
 mp_obj_array_t *o = m_new_obj(mp_obj_array_t);
 o->base.type = &mp_type_bytearray;
 o->typecode = BYTEARRAY_TYPECODE;
 o->free = 0;
 o->len = n;
 o->items = items;
 return MP_OBJ_FROM_PTR(o);
}
#endif

/******************************************************************************/
// array iterator

typedef struct _mp_obj_array_it_t {
 mp_obj_base_t base;
 mp_obj_array_t *array;
 size_t offset;
 size_t cur;
} mp_obj_array_it_t;

STATIC mp_obj_t array_it_iternext(mp_obj_t self_in) {
 mp_obj_array_it_t *self = MP_OBJ_TO_PTR(self_in);
 if (self->cur < self->array->len) {
 return mp_binary_get_val_array(self->array->typecode & TYPECODE_MASK, self->array->items, self->offset + self->cur++);
 } else {
 return MP_OBJ_STOP_ITERATION;
 }
}

STATIC const mp_obj_type_t array_it_type = {
 { &mp_type_type },
 .name = MP_QSTR_iterator,
 .getiter = mp_identity_getiter,
 .iternext = array_it_iternext,
};

STATIC mp_obj_t array_iterator_new(mp_obj_t array_in, mp_obj_iter_buf_t *iter_buf) {
 assert(sizeof(mp_obj_array_t) <= sizeof(mp_obj_iter_buf_t));
 mp_obj_array_t *array = MP_OBJ_TO_PTR(array_in);
 mp_obj_array_it_t *o = (mp_obj_array_it_t *)iter_buf;
 o->base.type = &array_it_type;
 o->array = array;
 o->offset = 0;
 o->cur = 0;
 #if MICROPY_PY_BUILTINS_MEMORYVIEW
 if (array->base.type == &mp_type_memoryview) {
 o->offset = array->memview_offset;
 }
 #endif
 return MP_OBJ_FROM_PTR(o);
}

#endif // MICROPY_PY_ARRAY || MICROPY_PY_BUILTINS_BYTEARRAY || MICROPY_PY_BUILTINS_MEMORYVIEW