/*
 * This file is part of the MicroPython project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2013-2017 Damien P. George
 *
 * 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 <stdbool.h>
#include <string.h>
#include <assert.h>

#include "py/runtime.h"
#include "py/builtin.h"

#if MICROPY_PY_BUILTINS_SET

typedef struct _mp_obj_set_t {
 mp_obj_base_t base;
 mp_set_t set;
} mp_obj_set_t;

typedef struct _mp_obj_set_it_t {
 mp_obj_base_t base;
 mp_fun_1_t iternext;
 mp_obj_set_t *set;
 size_t cur;
} mp_obj_set_it_t;

STATIC bool is_set_or_frozenset(mp_obj_t o) {
 return mp_obj_is_type(o, &mp_type_set)
 #if MICROPY_PY_BUILTINS_FROZENSET
 || mp_obj_is_type(o, &mp_type_frozenset)
 #endif
 ;
}

// This macro is shorthand for mp_check_self to verify the argument is a set.
#define check_set(o) mp_check_self(mp_obj_is_type(o, &mp_type_set))

// This macro is shorthand for mp_check_self to verify the argument is a
// set or frozenset for methods that operate on both of these types.
#define check_set_or_frozenset(o) mp_check_self(is_set_or_frozenset(o))

STATIC void set_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
 (void)kind;
 mp_obj_set_t *self = MP_OBJ_TO_PTR(self_in);
 #if MICROPY_PY_BUILTINS_FROZENSET
 bool is_frozen = mp_obj_is_type(self_in, &mp_type_frozenset);
 #endif
 if (self->set.used == 0) {
 #if MICROPY_PY_BUILTINS_FROZENSET
 if (is_frozen) {
 mp_print_str(print, "frozen");
 }
 #endif
 mp_print_str(print, "set()");
 return;
 }
 bool first = true;
 #if MICROPY_PY_BUILTINS_FROZENSET
 if (is_frozen) {
 mp_print_str(print, "frozenset(");
 }
 #endif
 mp_print_str(print, "{");
 for (size_t i = 0; i < self->set.alloc; i++) {
 if (mp_set_slot_is_filled(&self->set, i)) {
 if (!first) {
 mp_print_str(print, ", ");
 }
 first = false;
 mp_obj_print_helper(print, self->set.table[i], PRINT_REPR);
 }
 }
 mp_print_str(print, "}");
 #if MICROPY_PY_BUILTINS_FROZENSET
 if (is_frozen) {
 mp_print_str(print, ")");
 }
 #endif
}

STATIC mp_obj_t set_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
 mp_arg_check_num(n_args, n_kw, 0, 1, false);

 switch (n_args) {
 case 0: {
 // create a new, empty set
 mp_obj_set_t *set = MP_OBJ_TO_PTR(mp_obj_new_set(0, NULL));
 // set actual set/frozenset type
 set->base.type = type;
 return MP_OBJ_FROM_PTR(set);
 }

 case 1:
 default: { // can only be 0 or 1 arg
 // 1 argument, an iterable from which we make a new set
 mp_obj_t set = mp_obj_new_set(0, NULL);
 mp_obj_t iterable = mp_getiter(args[0], NULL);
 mp_obj_t item;
 while ((item = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
 mp_obj_set_store(set, item);
 }
 // Set actual set/frozenset type
 ((mp_obj_set_t *)MP_OBJ_TO_PTR(set))->base.type = type;
 return set;
 }
 }
}

STATIC mp_obj_t set_it_iternext(mp_obj_t self_in) {
 mp_obj_set_it_t *self = MP_OBJ_TO_PTR(self_in);
 size_t max = self->set->set.alloc;
 mp_set_t *set = &self->set->set;

 for (size_t i = self->cur; i < max; i++) {
 if (mp_set_slot_is_filled(set, i)) {
 self->cur = i + 1;
 return set->table[i];
 }
 }

 return MP_OBJ_STOP_ITERATION;
}

STATIC mp_obj_t set_getiter(mp_obj_t set_in, mp_obj_iter_buf_t *iter_buf) {
 assert(sizeof(mp_obj_set_it_t) <= sizeof(mp_obj_iter_buf_t));
 mp_obj_set_it_t *o = (mp_obj_set_it_t *)iter_buf;
 o->base.type = &mp_type_polymorph_iter;
 o->iternext = set_it_iternext;
 o->set = (mp_obj_set_t *)MP_OBJ_TO_PTR(set_in);
 o->cur = 0;
 return MP_OBJ_FROM_PTR(o);
}

/******************************************************************************/
/* set methods */

STATIC mp_obj_t set_add(mp_obj_t self_in, mp_obj_t item) {
 check_set(self_in);
 mp_obj_set_t *self = MP_OBJ_TO_PTR(self_in);
 mp_set_lookup(&self->set, item, MP_MAP_LOOKUP_ADD_IF_NOT_FOUND);
 return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(set_add_obj, set_add);

STATIC mp_obj_t set_clear(mp_obj_t self_in) {
 check_set(self_in);
 mp_obj_set_t *self = MP_OBJ_TO_PTR(self_in);
 mp_set_clear(&self->set);
 return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(set_clear_obj, set_clear);

STATIC mp_obj_t set_copy(mp_obj_t self_in) {
 check_set_or_frozenset(self_in);
 mp_obj_set_t *self = MP_OBJ_TO_PTR(self_in);
 mp_obj_set_t *other = m_new_obj(mp_obj_set_t);
 other->base.type = self->base.type;
 mp_set_init(&other->set, self->set.alloc);
 other->set.used = self->set.used;
 memcpy(other->set.table, self->set.table, self->set.alloc * sizeof(mp_obj_t));
 return MP_OBJ_FROM_PTR(other);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(set_copy_obj, set_copy);

STATIC mp_obj_t set_discard(mp_obj_t self_in, mp_obj_t item) {
 check_set(self_in);
 mp_obj_set_t *self = MP_OBJ_TO_PTR(self_in);
 mp_set_lookup(&self->set, item, MP_MAP_LOOKUP_REMOVE_IF_FOUND);
 return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(set_discard_obj, set_discard);

STATIC mp_obj_t set_diff_int(size_t n_args, const mp_obj_t *args, bool update) {
 mp_obj_t self;
 if (update) {
 check_set(args[0]);
 self = args[0];
 } else {
 self = set_copy(args[0]);
 }

 for (size_t i = 1; i < n_args; i++) {
 mp_obj_t other = args[i];
 if (self == other) {
 set_clear(self);
 } else {
 mp_set_t *self_set = &((mp_obj_set_t *)MP_OBJ_TO_PTR(self))->set;
 mp_obj_t iter = mp_getiter(other, NULL);
 mp_obj_t next;
 while ((next = mp_iternext(iter)) != MP_OBJ_STOP_ITERATION) {
 mp_set_lookup(self_set, next, MP_MAP_LOOKUP_REMOVE_IF_FOUND);
 }
 }
 }

 return self;
}

STATIC mp_obj_t set_diff(size_t n_args, const mp_obj_t *args) {
 return set_diff_int(n_args, args, false);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR(set_diff_obj, 1, set_diff);

STATIC mp_obj_t set_diff_update(size_t n_args, const mp_obj_t *args) {
 set_diff_int(n_args, args, true);
 return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR(set_diff_update_obj, 1, set_diff_update);

STATIC mp_obj_t set_intersect_int(mp_obj_t self_in, mp_obj_t other, bool update) {
 if (update) {
 check_set(self_in);
 } else {
 check_set_or_frozenset(self_in);
 }

 if (self_in == other) {
 return update ? mp_const_none : set_copy(self_in);
 }

 mp_obj_set_t *self = MP_OBJ_TO_PTR(self_in);
 mp_obj_set_t *out = MP_OBJ_TO_PTR(mp_obj_new_set(0, NULL));

 mp_obj_t iter = mp_getiter(other, NULL);
 mp_obj_t next;
 while ((next = mp_iternext(iter)) != MP_OBJ_STOP_ITERATION) {
 if (mp_set_lookup(&self->set, next, MP_MAP_LOOKUP)) {
 set_add(MP_OBJ_FROM_PTR(out), next);
 }
 }

 if (update) {
 m_del(mp_obj_t, self->set.table, self->set.alloc);
 self->set.alloc = out->set.alloc;
 self->set.used = out->set.used;
 self->set.table = out->set.table;
 }

 return update ? mp_const_none : MP_OBJ_FROM_PTR(out);
}

STATIC mp_obj_t set_intersect(mp_obj_t self_in, mp_obj_t other) {
 return set_intersect_int(self_in, other, false);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(set_intersect_obj, set_intersect);

STATIC mp_obj_t set_intersect_update(mp_obj_t self_in, mp_obj_t other) {
 return set_intersect_int(self_in, other, true);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(set_intersect_update_obj, set_intersect_update);

STATIC mp_obj_t set_isdisjoint(mp_obj_t self_in, mp_obj_t other) {
 check_set_or_frozenset(self_in);
 mp_obj_set_t *self = MP_OBJ_TO_PTR(self_in);

 mp_obj_iter_buf_t iter_buf;
 mp_obj_t iter = mp_getiter(other, &iter_buf);
 mp_obj_t next;
 while ((next = mp_iternext(iter)) != MP_OBJ_STOP_ITERATION) {
 if (mp_set_lookup(&self->set, next, MP_MAP_LOOKUP)) {
 return mp_const_false;
 }
 }
 return mp_const_true;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(set_isdisjoint_obj, set_isdisjoint);

STATIC mp_obj_t set_issubset_internal(mp_obj_t self_in, mp_obj_t other_in, bool proper) {
 mp_obj_set_t *self;
 bool cleanup_self = false;
 if (is_set_or_frozenset(self_in)) {
 self = MP_OBJ_TO_PTR(self_in);
 } else {
 self = MP_OBJ_TO_PTR(set_make_new(&mp_type_set, 1, 0, &self_in));
 cleanup_self = true;
 }

 mp_obj_set_t *other;
 bool cleanup_other = false;
 if (is_set_or_frozenset(other_in)) {
 other = MP_OBJ_TO_PTR(other_in);
 } else {
 other = MP_OBJ_TO_PTR(set_make_new(&mp_type_set, 1, 0, &other_in));
 cleanup_other = true;
 }
 mp_obj_t out = mp_const_true;
 if (proper && self->set.used == other->set.used) {
 out = mp_const_false;
 } else {
 mp_obj_iter_buf_t iter_buf;
 mp_obj_t iter = set_getiter(MP_OBJ_FROM_PTR(self), &iter_buf);
 mp_obj_t next;
 while ((next = set_it_iternext(iter)) != MP_OBJ_STOP_ITERATION) {
 if (!mp_set_lookup(&other->set, next, MP_MAP_LOOKUP)) {
 out = mp_const_false;
 break;
 }
 }
 }
 // TODO: Should free objects altogether
 if (cleanup_self) {
 set_clear(MP_OBJ_FROM_PTR(self));
 }
 if (cleanup_other) {
 set_clear(MP_OBJ_FROM_PTR(other));
 }
 return out;
}

STATIC mp_obj_t set_issubset(mp_obj_t self_in, mp_obj_t other_in) {
 return set_issubset_internal(self_in, other_in, false);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(set_issubset_obj, set_issubset);

STATIC mp_obj_t set_issubset_proper(mp_obj_t self_in, mp_obj_t other_in) {
 return set_issubset_internal(self_in, other_in, true);
}

STATIC mp_obj_t set_issuperset(mp_obj_t self_in, mp_obj_t other_in) {
 return set_issubset_internal(other_in, self_in, false);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(set_issuperset_obj, set_issuperset);

STATIC mp_obj_t set_issuperset_proper(mp_obj_t self_in, mp_obj_t other_in) {
 return set_issubset_internal(other_in, self_in, true);
}

STATIC mp_obj_t set_equal(mp_obj_t self_in, mp_obj_t other_in) {
 assert(is_set_or_frozenset(other_in));
 check_set_or_frozenset(self_in);
 mp_obj_set_t *self = MP_OBJ_TO_PTR(self_in);
 mp_obj_set_t *other = MP_OBJ_TO_PTR(other_in);
 if (self->set.used != other->set.used) {
 return mp_const_false;
 }
 return set_issubset(self_in, other_in);
}

STATIC mp_obj_t set_pop(mp_obj_t self_in) {
 check_set(self_in);
 mp_obj_set_t *self = MP_OBJ_TO_PTR(self_in);
 mp_obj_t obj = mp_set_remove_first(&self->set);
 if (obj == MP_OBJ_NULL) {
 mp_raise_msg(&mp_type_KeyError, MP_ERROR_TEXT("pop from an empty set"));
 }
 return obj;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(set_pop_obj, set_pop);

STATIC mp_obj_t set_remove(mp_obj_t self_in, mp_obj_t item) {
 check_set(self_in);
 mp_obj_set_t *self = MP_OBJ_TO_PTR(self_in);
 if (mp_set_lookup(&self->set, item, MP_MAP_LOOKUP_REMOVE_IF_FOUND) == MP_OBJ_NULL) {
 nlr_raise(mp_obj_new_exception_arg1(&mp_type_KeyError, item));
 }
 return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(set_remove_obj, set_remove);

STATIC mp_obj_t set_symmetric_difference_update(mp_obj_t self_in, mp_obj_t other_in) {
 check_set_or_frozenset(self_in); // can be frozenset due to call from set_symmetric_difference
 mp_obj_set_t *self = MP_OBJ_TO_PTR(self_in);
 mp_obj_t iter = mp_getiter(other_in, NULL);
 mp_obj_t next;
 while ((next = mp_iternext(iter)) != MP_OBJ_STOP_ITERATION) {
 mp_set_lookup(&self->set, next, MP_MAP_LOOKUP_ADD_IF_NOT_FOUND_OR_REMOVE_IF_FOUND);
 }
 return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(set_symmetric_difference_update_obj, set_symmetric_difference_update);

STATIC mp_obj_t set_symmetric_difference(mp_obj_t self_in, mp_obj_t other_in) {
 mp_obj_t self_out = set_copy(self_in);
 set_symmetric_difference_update(self_out, other_in);
 return self_out;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(set_symmetric_difference_obj, set_symmetric_difference);

STATIC void set_update_int(mp_obj_set_t *self, mp_obj_t other_in) {
 mp_obj_t iter = mp_getiter(other_in, NULL);
 mp_obj_t next;
 while ((next = mp_iternext(iter)) != MP_OBJ_STOP_ITERATION) {
 mp_set_lookup(&self->set, next, MP_MAP_LOOKUP_ADD_IF_NOT_FOUND);
 }
}

STATIC mp_obj_t set_update(size_t n_args, const mp_obj_t *args) {
 check_set(args[0]);
 for (size_t i = 1; i < n_args; i++) {
 set_update_int(MP_OBJ_TO_PTR(args[0]), args[i]);
 }

 return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR(set_update_obj, 1, set_update);

STATIC mp_obj_t set_union(mp_obj_t self_in, mp_obj_t other_in) {
 check_set_or_frozenset(self_in);
 mp_obj_t self = set_copy(self_in);
 set_update_int(MP_OBJ_TO_PTR(self), other_in);
 return self;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(set_union_obj, set_union);

STATIC mp_obj_t set_unary_op(mp_unary_op_t op, mp_obj_t self_in) {
 mp_obj_set_t *self = MP_OBJ_TO_PTR(self_in);
 switch (op) {
 case MP_UNARY_OP_BOOL:
 return mp_obj_new_bool(self->set.used != 0);
 case MP_UNARY_OP_LEN:
 return MP_OBJ_NEW_SMALL_INT(self->set.used);
 #if MICROPY_PY_BUILTINS_FROZENSET
 case MP_UNARY_OP_HASH:
 if (mp_obj_is_type(self_in, &mp_type_frozenset)) {
 // start hash with unique value
 mp_int_t hash = (mp_int_t)(uintptr_t)&mp_type_frozenset;
 size_t max = self->set.alloc;
 mp_set_t *set = &self->set;

 for (size_t i = 0; i < max; i++) {
 if (mp_set_slot_is_filled(set, i)) {
 hash += MP_OBJ_SMALL_INT_VALUE(mp_unary_op(MP_UNARY_OP_HASH, set->table[i]));
 }
 }
 return MP_OBJ_NEW_SMALL_INT(hash);
 }
 #endif
 default:
 return MP_OBJ_NULL; // op not supported
 }
}

STATIC mp_obj_t set_binary_op(mp_binary_op_t op, mp_obj_t lhs, mp_obj_t rhs) {
 mp_obj_t args[] = {lhs, rhs};
 #if MICROPY_PY_BUILTINS_FROZENSET
 bool update = mp_obj_is_type(lhs, &mp_type_set);
 #else
 bool update = true;
 #endif
 if (op != MP_BINARY_OP_CONTAINS && !is_set_or_frozenset(rhs)) {
 // For all ops except containment the RHS must be a set/frozenset
 return MP_OBJ_NULL;
 }
 switch (op) {
 case MP_BINARY_OP_OR:
 return set_union(lhs, rhs);
 case MP_BINARY_OP_XOR:
 return set_symmetric_difference(lhs, rhs);
 case MP_BINARY_OP_AND:
 return set_intersect(lhs, rhs);
 case MP_BINARY_OP_SUBTRACT:
 return set_diff(2, args);
 case MP_BINARY_OP_INPLACE_OR:
 if (update) {
 set_update(2, args);
 return lhs;
 } else {
 return set_union(lhs, rhs);
 }
 case MP_BINARY_OP_INPLACE_XOR:
 if (update) {
 set_symmetric_difference_update(lhs, rhs);
 return lhs;
 } else {
 return set_symmetric_difference(lhs, rhs);
 }
 case MP_BINARY_OP_INPLACE_AND:
 rhs = set_intersect_int(lhs, rhs, update);
 if (update) {
 return lhs;
 } else {
 return rhs;
 }
 case MP_BINARY_OP_INPLACE_SUBTRACT:
 return set_diff_int(2, args, update);
 case MP_BINARY_OP_LESS:
 return set_issubset_proper(lhs, rhs);
 case MP_BINARY_OP_MORE:
 return set_issuperset_proper(lhs, rhs);
 case MP_BINARY_OP_EQUAL:
 return set_equal(lhs, rhs);
 case MP_BINARY_OP_LESS_EQUAL:
 return set_issubset(lhs, rhs);
 case MP_BINARY_OP_MORE_EQUAL:
 return set_issuperset(lhs, rhs);
 case MP_BINARY_OP_CONTAINS: {
 mp_obj_set_t *o = MP_OBJ_TO_PTR(lhs);
 mp_obj_t elem = mp_set_lookup(&o->set, rhs, MP_MAP_LOOKUP);
 return mp_obj_new_bool(elem != MP_OBJ_NULL);
 }
 default:
 return MP_OBJ_NULL; // op not supported
 }
}

/******************************************************************************/
/* set constructors & public C API */

STATIC const mp_rom_map_elem_t set_locals_dict_table[] = {
 { MP_ROM_QSTR(MP_QSTR_add), MP_ROM_PTR(&set_add_obj) },
 { MP_ROM_QSTR(MP_QSTR_clear), MP_ROM_PTR(&set_clear_obj) },
 { MP_ROM_QSTR(MP_QSTR_copy), MP_ROM_PTR(&set_copy_obj) },
 { MP_ROM_QSTR(MP_QSTR_discard), MP_ROM_PTR(&set_discard_obj) },
 { MP_ROM_QSTR(MP_QSTR_difference), MP_ROM_PTR(&set_diff_obj) },
 { MP_ROM_QSTR(MP_QSTR_difference_update), MP_ROM_PTR(&set_diff_update_obj) },
 { MP_ROM_QSTR(MP_QSTR_intersection), MP_ROM_PTR(&set_intersect_obj) },
 { MP_ROM_QSTR(MP_QSTR_intersection_update), MP_ROM_PTR(&set_intersect_update_obj) },
 { MP_ROM_QSTR(MP_QSTR_isdisjoint), MP_ROM_PTR(&set_isdisjoint_obj) },
 { MP_ROM_QSTR(MP_QSTR_issubset), MP_ROM_PTR(&set_issubset_obj) },
 { MP_ROM_QSTR(MP_QSTR_issuperset), MP_ROM_PTR(&set_issuperset_obj) },
 { MP_ROM_QSTR(MP_QSTR_pop), MP_ROM_PTR(&set_pop_obj) },
 { MP_ROM_QSTR(MP_QSTR_remove), MP_ROM_PTR(&set_remove_obj) },
 { MP_ROM_QSTR(MP_QSTR_symmetric_difference), MP_ROM_PTR(&set_symmetric_difference_obj) },
 { MP_ROM_QSTR(MP_QSTR_symmetric_difference_update), MP_ROM_PTR(&set_symmetric_difference_update_obj) },
 { MP_ROM_QSTR(MP_QSTR_union), MP_ROM_PTR(&set_union_obj) },
 { MP_ROM_QSTR(MP_QSTR_update), MP_ROM_PTR(&set_update_obj) },
 { MP_ROM_QSTR(MP_QSTR___contains__), MP_ROM_PTR(&mp_op_contains_obj) },
};
STATIC MP_DEFINE_CONST_DICT(set_locals_dict, set_locals_dict_table);

const mp_obj_type_t mp_type_set = {
 { &mp_type_type },
 .name = MP_QSTR_set,
 .print = set_print,
 .make_new = set_make_new,
 .unary_op = set_unary_op,
 .binary_op = set_binary_op,
 .getiter = set_getiter,
 .locals_dict = (mp_obj_dict_t *)&set_locals_dict,
};

#if MICROPY_PY_BUILTINS_FROZENSET
STATIC const mp_rom_map_elem_t frozenset_locals_dict_table[] = {
 { MP_ROM_QSTR(MP_QSTR_copy), MP_ROM_PTR(&set_copy_obj) },
 { MP_ROM_QSTR(MP_QSTR_difference), MP_ROM_PTR(&set_diff_obj) },
 { MP_ROM_QSTR(MP_QSTR_intersection), MP_ROM_PTR(&set_intersect_obj) },
 { MP_ROM_QSTR(MP_QSTR_isdisjoint), MP_ROM_PTR(&set_isdisjoint_obj) },
 { MP_ROM_QSTR(MP_QSTR_issubset), MP_ROM_PTR(&set_issubset_obj) },
 { MP_ROM_QSTR(MP_QSTR_issuperset), MP_ROM_PTR(&set_issuperset_obj) },
 { MP_ROM_QSTR(MP_QSTR_symmetric_difference), MP_ROM_PTR(&set_symmetric_difference_obj) },
 { MP_ROM_QSTR(MP_QSTR_union), MP_ROM_PTR(&set_union_obj) },
 { MP_ROM_QSTR(MP_QSTR___contains__), MP_ROM_PTR(&mp_op_contains_obj) },
};
STATIC MP_DEFINE_CONST_DICT(frozenset_locals_dict, frozenset_locals_dict_table);

const mp_obj_type_t mp_type_frozenset = {
 { &mp_type_type },
 .flags = MP_TYPE_FLAG_EQ_CHECKS_OTHER_TYPE,
 .name = MP_QSTR_frozenset,
 .print = set_print,
 .make_new = set_make_new,
 .unary_op = set_unary_op,
 .binary_op = set_binary_op,
 .getiter = set_getiter,
 .locals_dict = (mp_obj_dict_t *)&frozenset_locals_dict,
};
#endif

mp_obj_t mp_obj_new_set(size_t n_args, mp_obj_t *items) {
 mp_obj_set_t *o = m_new_obj(mp_obj_set_t);
 o->base.type = &mp_type_set;
 mp_set_init(&o->set, n_args);
 for (size_t i = 0; i < n_args; i++) {
 mp_set_lookup(&o->set, items[i], MP_MAP_LOOKUP_ADD_IF_NOT_FOUND);
 }
 return MP_OBJ_FROM_PTR(o);
}

void mp_obj_set_store(mp_obj_t self_in, mp_obj_t item) {
 mp_check_self(mp_obj_is_type(self_in, &mp_type_set));
 mp_obj_set_t *self = MP_OBJ_TO_PTR(self_in);
 mp_set_lookup(&self->set, item, MP_MAP_LOOKUP_ADD_IF_NOT_FOUND);
}

#endif // MICROPY_PY_BUILTINS_SET