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circuitpython/py/objset.c

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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 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/nlr.h"
#include "py/runtime.h"
#include "py/runtime0.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_obj_set_t *set;
mp_uint_t cur;
} mp_obj_set_it_t;
STATIC mp_obj_t set_it_iternext(mp_obj_t self_in);
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
;
}
#if MICROPY_PY_BUILTINS_FROZENSET
STATIC void check_set_or_frozenset(mp_obj_t o) {
if (!is_set_or_frozenset(o)) {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "'set' object required"));
}
}
#else
#define check_set_or_frozenset(o) check_set(o)
#endif
STATIC void check_set(mp_obj_t o) {
if (!MP_OBJ_IS_TYPE(o, &mp_type_set)) {
// Emulate CPython behavior
// AttributeError: 'frozenset' object has no attribute 'add'
#if MICROPY_PY_BUILTINS_FROZENSET
if (MP_OBJ_IS_TYPE(o, &mp_type_frozenset)) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_AttributeError, "'frozenset' has no such attribute"));
}
#endif
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "'set' object required"));
}
}
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 = 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 (mp_uint_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(mp_obj_t type_in, mp_uint_t n_args, mp_uint_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_new_set(0, NULL);
// set actual set/frozenset type
set->base.type = type_in;
return set;
}
case 1:
default: { // can only be 0 or 1 arg
// 1 argument, an iterable from which we make a new set
mp_obj_set_t *set = mp_obj_new_set(0, NULL);
mp_obj_t iterable = mp_getiter(args[0]);
mp_obj_t item;
while ((item = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
mp_obj_set_store(set, item);
}
// Set actual set/frozenset type
set->base.type = type_in;
return set;
}
}
}
const mp_obj_type_t mp_type_set_it = {
{ &mp_type_type },
.name = MP_QSTR_iterator,
.getiter = mp_identity,
.iternext = set_it_iternext,
};
STATIC mp_obj_t set_it_iternext(mp_obj_t self_in) {
assert(MP_OBJ_IS_TYPE(self_in, &mp_type_set_it));
mp_obj_set_it_t *self = self_in;
mp_uint_t max = self->set->set.alloc;
mp_set_t *set = &self->set->set;
for (mp_uint_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_set_it_t *o = m_new_obj(mp_obj_set_it_t);
o->base.type = &mp_type_set_it;
o->set = (mp_obj_set_t *)set_in;
o->cur = 0;
return 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 = 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 = 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_as_mutable(mp_obj_t self_in) {
mp_obj_set_t *self = self_in;
mp_obj_set_t *other = m_new_obj(mp_obj_set_t);
other->base.type = &mp_type_set;
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 other;
}
STATIC mp_obj_t set_copy(mp_obj_t self_in) {
check_set_or_frozenset(self_in);
mp_obj_set_t *self = self_in;
mp_obj_set_t *other = set_copy_as_mutable(self);
other->base.type = self->base.type;
return 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 = 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(mp_uint_t n_args, const mp_obj_t *args, bool update) {
assert(n_args > 0);
mp_obj_set_t *self;
if (update) {
check_set(args[0]);
self = args[0];
} else {
check_set_or_frozenset(args[0]);
self = set_copy_as_mutable(args[0]);
}
for (mp_uint_t i = 1; i < n_args; i++) {
mp_obj_t other = args[i];
if (self == other) {
set_clear(self);
} else {
mp_obj_t iter = mp_getiter(other);
mp_obj_t next;
while ((next = mp_iternext(iter)) != MP_OBJ_STOP_ITERATION) {
set_discard(self, next);
}
}
}
self->base.type = ((mp_obj_set_t*)args[0])->base.type;
return self;
}
STATIC mp_obj_t set_diff(mp_uint_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(mp_uint_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 = self_in;
mp_obj_set_t *out = mp_obj_new_set(0, NULL);
mp_obj_t iter = mp_getiter(other);
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(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 : 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 = self_in;
mp_obj_t iter = mp_getiter(other);
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 = self_in;
} else {
self = set_make_new((mp_obj_t)&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 = other_in;
} else {
other = set_make_new((mp_obj_t)&mp_type_set, 1, 0, &other_in);
cleanup_other = true;
}
bool out = true;
if (proper && self->set.used == other->set.used) {
out = false;
} else {
mp_obj_t iter = set_getiter(self);
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 = false;
break;
}
}
}
// TODO: Should free objects altogether
if (cleanup_self) {
set_clear(self);
}
if (cleanup_other) {
set_clear(other);
}
return MP_BOOL(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) {
check_set_or_frozenset(self_in);
mp_obj_set_t *self = self_in;
if (!is_set_or_frozenset(other_in)) {
return mp_const_false;
}
mp_obj_set_t *other = 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 = self_in;
mp_obj_t obj = mp_set_remove_first(&self->set);
if (obj == MP_OBJ_NULL) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_KeyError, "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 = self_in;
if (mp_set_lookup(&self->set, item, MP_MAP_LOOKUP_REMOVE_IF_FOUND) == MP_OBJ_NULL) {
nlr_raise(mp_obj_new_exception(&mp_type_KeyError));
}
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(self_in);
mp_obj_set_t *self = self_in;
mp_obj_t iter = mp_getiter(other_in);
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) {
check_set_or_frozenset(self_in);
mp_obj_set_t *self_out = set_copy_as_mutable(self_in);
set_symmetric_difference_update(self_out, other_in);
self_out->base.type = ((mp_obj_set_t*)self_in)->base.type;
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);
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(mp_uint_t n_args, const mp_obj_t *args) {
assert(n_args > 0);
for (mp_uint_t i = 1; i < n_args; i++) {
set_update_int(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_set_t *self = set_copy(self_in);
set_update_int(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_uint_t op, mp_obj_t self_in) {
mp_obj_set_t *self = self_in;
switch (op) {
case MP_UNARY_OP_BOOL: return MP_BOOL(self->set.used != 0);
case MP_UNARY_OP_LEN: return MP_OBJ_NEW_SMALL_INT(self->set.used);
default: return MP_OBJ_NULL; // op not supported
}
}
STATIC mp_obj_t set_binary_op(mp_uint_t op, mp_obj_t lhs, mp_obj_t rhs) {
mp_obj_t args[] = {lhs, rhs};
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:
return set_union(lhs, rhs);
case MP_BINARY_OP_INPLACE_XOR:
return set_symmetric_difference(lhs, rhs);
case MP_BINARY_OP_INPLACE_AND:
return set_intersect(lhs, rhs);
case MP_BINARY_OP_INPLACE_SUBTRACT:
return set_diff(2, args);
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_IN: {
mp_obj_set_t *o = lhs;
mp_obj_t elem = mp_set_lookup(&o->set, rhs, MP_MAP_LOOKUP);
return MP_BOOL(elem != NULL);
}
default:
return MP_OBJ_NULL; // op not supported
}
}
/******************************************************************************/
/* set constructors & public C API */
STATIC const mp_map_elem_t set_locals_dict_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR_add), (mp_obj_t)&set_add_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_clear), (mp_obj_t)&set_clear_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_copy), (mp_obj_t)&set_copy_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_discard), (mp_obj_t)&set_discard_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_difference), (mp_obj_t)&set_diff_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_difference_update), (mp_obj_t)&set_diff_update_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_intersection), (mp_obj_t)&set_intersect_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_intersection_update), (mp_obj_t)&set_intersect_update_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_isdisjoint), (mp_obj_t)&set_isdisjoint_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_issubset), (mp_obj_t)&set_issubset_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_issuperset), (mp_obj_t)&set_issuperset_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_pop), (mp_obj_t)&set_pop_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_remove), (mp_obj_t)&set_remove_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_symmetric_difference), (mp_obj_t)&set_symmetric_difference_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_symmetric_difference_update), (mp_obj_t)&set_symmetric_difference_update_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_union), (mp_obj_t)&set_union_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_update), (mp_obj_t)&set_update_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR___contains__), (mp_obj_t)&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_t)&set_locals_dict,
};
#if MICROPY_PY_BUILTINS_FROZENSET
const mp_obj_type_t mp_type_frozenset = {
{ &mp_type_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_t)&set_locals_dict,
};
#endif
mp_obj_t mp_obj_new_set(mp_uint_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 (mp_uint_t i = 0; i < n_args; i++) {
mp_set_lookup(&o->set, items[i], MP_MAP_LOOKUP_ADD_IF_NOT_FOUND);
}
return o;
}
void mp_obj_set_store(mp_obj_t self_in, mp_obj_t item) {
assert(MP_OBJ_IS_TYPE(self_in, &mp_type_set));
mp_obj_set_t *self = self_in;
mp_set_lookup(&self->set, item, MP_MAP_LOOKUP_ADD_IF_NOT_FOUND);
}
#endif // MICROPY_PY_BUILTINS_SET
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