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micropython/py/objdict.c

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#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <assert.h>
#include "nlr.h"
#include "misc.h"
#include "mpconfig.h"
#include "qstr.h"
#include "obj.h"
#include "runtime0.h"
#include "runtime.h"
#include "map.h"
typedef struct _mp_obj_dict_t {
mp_obj_base_t base;
mp_map_t map;
} mp_obj_dict_t;
static mp_obj_t mp_obj_new_dict_iterator(mp_obj_dict_t *dict, int cur);
static mp_map_elem_t *dict_it_iternext_elem(mp_obj_t self_in);
static void dict_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
mp_obj_dict_t *self = self_in;
bool first = true;
print(env, "{");
mp_obj_t *dict_iter = mp_obj_new_dict_iterator(self, 0);
mp_map_elem_t *next = NULL;
while ((next = dict_it_iternext_elem(dict_iter)) != NULL) {
if (!first) {
print(env, ", ");
}
first = false;
mp_obj_print_helper(print, env, next->key, PRINT_REPR);
print(env, ": ");
mp_obj_print_helper(print, env, next->value, PRINT_REPR);
}
print(env, "}");
}
static mp_obj_t dict_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
// TODO create from an iterable!
return rt_build_map(0);
}
static mp_obj_t dict_unary_op(int op, mp_obj_t self_in) {
mp_obj_dict_t *self = self_in;
switch (op) {
case RT_UNARY_OP_NOT: if (self->map.used == 0) { return mp_const_true; } else { return mp_const_false; }
default: return MP_OBJ_NULL; // op not supported for None
}
}
static mp_obj_t dict_binary_op(int op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
mp_obj_dict_t *o = lhs_in;
switch (op) {
case RT_BINARY_OP_SUBSCR:
{
// dict load
mp_map_elem_t *elem = mp_map_lookup(&o->map, rhs_in, MP_MAP_LOOKUP);
if (elem == NULL) {
nlr_jump(mp_obj_new_exception_msg(MP_QSTR_KeyError, "<value>"));
} else {
return elem->value;
}
}
case RT_COMPARE_OP_IN:
case RT_COMPARE_OP_NOT_IN:
{
mp_map_elem_t *elem = mp_map_lookup(&o->map, rhs_in, MP_MAP_LOOKUP);
return MP_BOOL((op == RT_COMPARE_OP_IN) ^ (elem == NULL));
}
default:
// op not supported
return NULL;
}
}
/******************************************************************************/
/* dict iterator */
typedef struct _mp_obj_dict_it_t {
mp_obj_base_t base;
mp_obj_dict_t *dict;
machine_uint_t cur;
} mp_obj_dict_it_t;
static mp_map_elem_t *dict_it_iternext_elem(mp_obj_t self_in) {
mp_obj_dict_it_t *self = self_in;
machine_uint_t max = self->dict->map.alloc;
mp_map_elem_t *table = self->dict->map.table;
for (int i = self->cur; i < max; i++) {
if (table[i].key != NULL) {
self->cur = i + 1;
return &(table[i]);
}
}
return NULL;
}
mp_obj_t dict_it_iternext(mp_obj_t self_in) {
mp_map_elem_t *next = dict_it_iternext_elem(self_in);
if (next != NULL) {
return next->key;
} else {
return mp_const_stop_iteration;
}
}
static const mp_obj_type_t dict_it_type = {
{ &mp_const_type },
"dict_iterator",
.iternext = dict_it_iternext,
};
static mp_obj_t mp_obj_new_dict_iterator(mp_obj_dict_t *dict, int cur) {
mp_obj_dict_it_t *o = m_new_obj(mp_obj_dict_it_t);
o->base.type = &dict_it_type;
o->dict = dict;
o->cur = cur;
return o;
}
static mp_obj_t dict_getiter(mp_obj_t o_in) {
return mp_obj_new_dict_iterator(o_in, 0);
}
/******************************************************************************/
/* dict methods */
static mp_obj_t dict_clear(mp_obj_t self_in) {
assert(MP_OBJ_IS_TYPE(self_in, &dict_type));
mp_obj_dict_t *self = self_in;
mp_map_clear(&self->map);
return mp_const_none;
}
static MP_DEFINE_CONST_FUN_OBJ_1(dict_clear_obj, dict_clear);
static mp_obj_t dict_copy(mp_obj_t self_in) {
assert(MP_OBJ_IS_TYPE(self_in, &dict_type));
mp_obj_dict_t *self = self_in;
mp_obj_dict_t *other = mp_obj_new_dict(self->map.alloc);
other->map.used = self->map.used;
memcpy(other->map.table, self->map.table, self->map.alloc * sizeof(mp_map_elem_t));
return other;
}
static MP_DEFINE_CONST_FUN_OBJ_1(dict_copy_obj, dict_copy);
// this is a classmethod
static mp_obj_t dict_fromkeys(uint n_args, const mp_obj_t *args) {
assert(2 <= n_args && n_args <= 3);
mp_obj_t iter = rt_getiter(args[1]);
mp_obj_t len = mp_obj_len_maybe(iter);
mp_obj_t value = mp_const_none;
mp_obj_t next = NULL;
mp_obj_dict_t *self = NULL;
if (n_args > 2) {
value = args[2];
}
if (len == MP_OBJ_NULL) {
/* object's type doesn't have a __len__ slot */
self = mp_obj_new_dict(0);
} else {
self = mp_obj_new_dict(MP_OBJ_SMALL_INT_VALUE(len));
}
while ((next = rt_iternext(iter)) != mp_const_stop_iteration) {
mp_map_lookup(&self->map, next, MP_MAP_LOOKUP_ADD_IF_NOT_FOUND)->value = value;
}
return self;
}
static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(dict_fromkeys_fun_obj, 2, 3, dict_fromkeys);
static MP_DEFINE_CONST_CLASSMETHOD_OBJ(dict_fromkeys_obj, (const mp_obj_t)&dict_fromkeys_fun_obj);
static mp_obj_t dict_get_helper(mp_map_t *self, mp_obj_t key, mp_obj_t deflt, mp_map_lookup_kind_t lookup_kind) {
mp_map_elem_t *elem = mp_map_lookup(self, key, lookup_kind);
mp_obj_t value;
if (elem == NULL || elem->value == NULL) {
if (deflt == NULL) {
if (lookup_kind == MP_MAP_LOOKUP_REMOVE_IF_FOUND) {
nlr_jump(mp_obj_new_exception_msg(MP_QSTR_KeyError, "<value>"));
} else {
value = mp_const_none;
}
} else {
value = deflt;
}
} else {
value = elem->value;
if (lookup_kind == MP_MAP_LOOKUP_REMOVE_IF_FOUND) {
// catch the leak (from mp_map_lookup)
m_free(elem, sizeof(mp_map_elem_t));
}
}
if (lookup_kind == MP_MAP_LOOKUP_ADD_IF_NOT_FOUND) {
elem->value = value;
}
return value;
}
static mp_obj_t dict_get(uint n_args, const mp_obj_t *args) {
assert(2 <= n_args && n_args <= 3);
assert(MP_OBJ_IS_TYPE(args[0], &dict_type));
return dict_get_helper(&((mp_obj_dict_t *)args[0])->map,
args[1],
n_args == 3 ? args[2] : NULL,
MP_MAP_LOOKUP);
}
static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(dict_get_obj, 2, 3, dict_get);
static mp_obj_t dict_pop(uint n_args, const mp_obj_t *args) {
assert(2 <= n_args && n_args <= 3);
assert(MP_OBJ_IS_TYPE(args[0], &dict_type));
return dict_get_helper(&((mp_obj_dict_t *)args[0])->map,
args[1],
n_args == 3 ? args[2] : NULL,
MP_MAP_LOOKUP_REMOVE_IF_FOUND);
}
static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(dict_pop_obj, 2, 3, dict_pop);
static mp_obj_t dict_setdefault(uint n_args, const mp_obj_t *args) {
assert(2 <= n_args && n_args <= 3);
assert(MP_OBJ_IS_TYPE(args[0], &dict_type));
return dict_get_helper(&((mp_obj_dict_t *)args[0])->map,
args[1],
n_args == 3 ? args[2] : NULL,
MP_MAP_LOOKUP_ADD_IF_NOT_FOUND);
}
static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(dict_setdefault_obj, 2, 3, dict_setdefault);
static mp_obj_t dict_popitem(mp_obj_t self_in) {
assert(MP_OBJ_IS_TYPE(self_in, &dict_type));
mp_obj_dict_t *self = self_in;
if (self->map.used == 0) {
nlr_jump(mp_obj_new_exception_msg(MP_QSTR_KeyError, "popitem(): dictionary is empty"));
}
mp_obj_dict_it_t *iter = mp_obj_new_dict_iterator(self, 0);
mp_map_elem_t *next = dict_it_iternext_elem(iter);
self->map.used--;
mp_obj_t items[] = {next->key, next->value};
next->key = NULL;
next->value = NULL;
mp_obj_t tuple = mp_obj_new_tuple(2, items);
return tuple;
}
static MP_DEFINE_CONST_FUN_OBJ_1(dict_popitem_obj, dict_popitem);
static mp_obj_t dict_update(mp_obj_t self_in, mp_obj_t iterable) {
assert(MP_OBJ_IS_TYPE(self_in, &dict_type));
mp_obj_dict_t *self = self_in;
/* TODO: check for the "keys" method */
mp_obj_t iter = rt_getiter(iterable);
mp_obj_t next = NULL;
while ((next = rt_iternext(iter)) != mp_const_stop_iteration) {
mp_obj_t inneriter = rt_getiter(next);
mp_obj_t key = rt_iternext(inneriter);
mp_obj_t value = rt_iternext(inneriter);
mp_obj_t stop = rt_iternext(inneriter);
if (key == mp_const_stop_iteration
|| value == mp_const_stop_iteration
|| stop != mp_const_stop_iteration) {
nlr_jump(mp_obj_new_exception_msg(
MP_QSTR_ValueError,
"dictionary update sequence has the wrong length"));
} else {
mp_map_lookup(&self->map, key, MP_MAP_LOOKUP_ADD_IF_NOT_FOUND)->value = value;
}
}
return mp_const_none;
}
static MP_DEFINE_CONST_FUN_OBJ_2(dict_update_obj, dict_update);
/******************************************************************************/
/* dict views */
static const mp_obj_type_t dict_view_type;
static const mp_obj_type_t dict_view_it_type;
typedef enum _mp_dict_view_kind_t {
MP_DICT_VIEW_ITEMS,
MP_DICT_VIEW_KEYS,
MP_DICT_VIEW_VALUES,
} mp_dict_view_kind_t;
static char *mp_dict_view_names[] = {"dict_items", "dict_keys", "dict_values"};
typedef struct _mp_obj_dict_view_it_t {
mp_obj_base_t base;
mp_dict_view_kind_t kind;
mp_obj_dict_it_t *iter;
machine_uint_t cur;
} mp_obj_dict_view_it_t;
typedef struct _mp_obj_dict_view_t {
mp_obj_base_t base;
mp_obj_dict_t *dict;
mp_dict_view_kind_t kind;
} mp_obj_dict_view_t;
static mp_obj_t dict_view_it_iternext(mp_obj_t self_in) {
assert(MP_OBJ_IS_TYPE(self_in, &dict_view_it_type));
mp_obj_dict_view_it_t *self = self_in;
mp_map_elem_t *next = dict_it_iternext_elem(self->iter);
if (next != NULL) {
switch (self->kind) {
case MP_DICT_VIEW_ITEMS:
{
mp_obj_t items[] = {next->key, next->value};
return mp_obj_new_tuple(2, items);
}
case MP_DICT_VIEW_KEYS:
return next->key;
case MP_DICT_VIEW_VALUES:
return next->value;
default:
assert(0); /* can't happen */
return mp_const_none;
}
} else {
return mp_const_stop_iteration;
}
}
static const mp_obj_type_t dict_view_it_type = {
{ &mp_const_type },
"dict_view_iterator",
.iternext = dict_view_it_iternext,
.methods = NULL, /* set operations still to come */
};
static mp_obj_t dict_view_getiter(mp_obj_t view_in) {
assert(MP_OBJ_IS_TYPE(view_in, &dict_view_type));
mp_obj_dict_view_t *view = view_in;
mp_obj_dict_view_it_t *o = m_new_obj(mp_obj_dict_view_it_t);
o->base.type = &dict_view_it_type;
o->kind = view->kind;
o->iter = mp_obj_new_dict_iterator(view->dict, 0);
return o;
}
static void dict_view_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
assert(MP_OBJ_IS_TYPE(self_in, &dict_view_type));
mp_obj_dict_view_t *self = self_in;
bool first = true;
print(env, mp_dict_view_names[self->kind]);
print(env, "([");
mp_obj_t *self_iter = dict_view_getiter(self);
mp_obj_t *next = NULL;
while ((next = dict_view_it_iternext(self_iter)) != mp_const_stop_iteration) {
if (!first) {
print(env, ", ");
}
first = false;
mp_obj_print_helper(print, env, next, PRINT_REPR);
}
print(env, "])");
}
static mp_obj_t dict_view_binary_op(int op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
/* only supported for the 'keys' kind until sets and dicts are refactored */
mp_obj_dict_view_t *o = lhs_in;
if (o->kind != MP_DICT_VIEW_KEYS) return NULL;
if (op != RT_COMPARE_OP_IN && op != RT_COMPARE_OP_NOT_IN) return NULL;
return dict_binary_op(op, o->dict, rhs_in);
}
static const mp_obj_type_t dict_view_type = {
{ &mp_const_type },
"dict_view",
.print = dict_view_print,
.binary_op = dict_view_binary_op,
.getiter = dict_view_getiter,
};
mp_obj_t mp_obj_new_dict_view(mp_obj_dict_t *dict, mp_dict_view_kind_t kind) {
mp_obj_dict_view_t *o = m_new_obj(mp_obj_dict_view_t);
o->base.type = &dict_view_type;
o->dict = dict;
o->kind = kind;
return o;
}
static mp_obj_t dict_view(mp_obj_t self_in, mp_dict_view_kind_t kind) {
assert(MP_OBJ_IS_TYPE(self_in, &dict_type));
mp_obj_dict_t *self = self_in;
return mp_obj_new_dict_view(self, kind);
}
static mp_obj_t dict_items(mp_obj_t self_in) {
return dict_view(self_in, MP_DICT_VIEW_ITEMS);
}
static MP_DEFINE_CONST_FUN_OBJ_1(dict_items_obj, dict_items);
static mp_obj_t dict_keys(mp_obj_t self_in) {
return dict_view(self_in, MP_DICT_VIEW_KEYS);
}
static MP_DEFINE_CONST_FUN_OBJ_1(dict_keys_obj, dict_keys);
static mp_obj_t dict_values(mp_obj_t self_in) {
return dict_view(self_in, MP_DICT_VIEW_VALUES);
}
static MP_DEFINE_CONST_FUN_OBJ_1(dict_values_obj, dict_values);
/******************************************************************************/
/* dict constructors & public C API */
static const mp_method_t dict_type_methods[] = {
{ "clear", &dict_clear_obj },
{ "copy", &dict_copy_obj },
{ "fromkeys", &dict_fromkeys_obj },
{ "get", &dict_get_obj },
{ "items", &dict_items_obj },
{ "keys", &dict_keys_obj },
{ "pop", &dict_pop_obj },
{ "popitem", &dict_popitem_obj },
{ "setdefault", &dict_setdefault_obj },
{ "update", &dict_update_obj },
{ "values", &dict_values_obj },
{ NULL, NULL }, // end-of-list sentinel
};
const mp_obj_type_t dict_type = {
{ &mp_const_type },
"dict",
.print = dict_print,
.make_new = dict_make_new,
.unary_op = dict_unary_op,
.binary_op = dict_binary_op,
.getiter = dict_getiter,
.methods = dict_type_methods,
};
mp_obj_t mp_obj_new_dict(int n_args) {
mp_obj_dict_t *o = m_new_obj(mp_obj_dict_t);
o->base.type = &dict_type;
mp_map_init(&o->map, n_args);
return o;
}
uint mp_obj_dict_len(mp_obj_t self_in) {
return ((mp_obj_dict_t *)self_in)->map.used;
}
mp_obj_t mp_obj_dict_store(mp_obj_t self_in, mp_obj_t key, mp_obj_t value) {
assert(MP_OBJ_IS_TYPE(self_in, &dict_type));
mp_obj_dict_t *self = self_in;
mp_map_lookup(&self->map, key, MP_MAP_LOOKUP_ADD_IF_NOT_FOUND)->value = value;
return self_in;
}
mp_map_t *mp_obj_dict_get_map(mp_obj_t self_in) {
assert(MP_OBJ_IS_TYPE(self_in, &dict_type));
mp_obj_dict_t *self = self_in;
return &self->map;
}
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