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extmod/modbtree: Implement keys(), values(), items() iterators. 

Each takes optional args of starting key, ending key, and flags (ending
key inclusive, reverse order).
This commit is contained in:
Paul Sokolovsky 2016-06-20 15:50:31 +03:00
parent 119b3dabf7
commit 6b088a671a
1 changed files with 46 additions and 12 deletions
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58
extmod/modbtree.c
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@ -44,6 +44,10 @@ typedef struct _mp_obj_btree_t {
mp_obj_t end_key;
#define FLAG_END_KEY_INCL 1
#define FLAG_DESC 2
#define FLAG_ITER_TYPE_MASK 0xc0
#define FLAG_ITER_KEYS 0x40
#define FLAG_ITER_VALUES 0x80
#define FLAG_ITER_ITEMS 0xc0
byte flags;
} mp_obj_btree_t;
@ -126,17 +130,37 @@ STATIC mp_obj_t btree_seq(size_t n_args, const mp_obj_t *args) {
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(btree_seq_obj, 2, 4, btree_seq);
STATIC mp_obj_t btree_range(size_t n_args, const mp_obj_t *args) {
STATIC mp_obj_t btree_init_iter(size_t n_args, const mp_obj_t *args, byte type) {
mp_obj_btree_t *self = MP_OBJ_TO_PTR(args[0]);
self->start_key = args[1];
self->end_key = args[2];
self->flags = 0;
if (n_args > 3) {
self->flags = MP_OBJ_SMALL_INT_VALUE(args[3]);
self->flags = type;
self->start_key = mp_const_none;
self->end_key = mp_const_none;
if (n_args > 1) {
self->start_key = args[1];
if (n_args > 2) {
self->end_key = args[2];
if (n_args > 3) {
self->flags |= MP_OBJ_SMALL_INT_VALUE(args[3]);
}
}
}
return args[0];
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(btree_range_obj, 3, 4, btree_range);
STATIC mp_obj_t btree_keys(size_t n_args, const mp_obj_t *args) {
return btree_init_iter(n_args, args, FLAG_ITER_KEYS);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(btree_keys_obj, 1, 4, btree_keys);
STATIC mp_obj_t btree_values(size_t n_args, const mp_obj_t *args) {
return btree_init_iter(n_args, args, FLAG_ITER_VALUES);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(btree_values_obj, 1, 4, btree_values);
STATIC mp_obj_t btree_items(size_t n_args, const mp_obj_t *args) {
return btree_init_iter(n_args, args, FLAG_ITER_ITEMS);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(btree_items_obj, 1, 4, btree_items);
STATIC mp_obj_t btree_iternext(mp_obj_t self_in) {
mp_obj_btree_t *self = MP_OBJ_TO_PTR(self_in);
@ -179,10 +203,18 @@ STATIC mp_obj_t btree_iternext(mp_obj_t self_in) {
}
}
mp_obj_tuple_t *pair = mp_obj_new_tuple(2, NULL);
pair->items[0] = mp_obj_new_bytes(key.data, key.size);
pair->items[1] = mp_obj_new_bytes(val.data, val.size);
return pair;
switch (self->flags & FLAG_ITER_TYPE_MASK) {
case FLAG_ITER_KEYS:
return mp_obj_new_bytes(key.data, key.size);
case FLAG_ITER_VALUES:
return mp_obj_new_bytes(val.data, val.size);
default: {
mp_obj_tuple_t *pair = mp_obj_new_tuple(2, NULL);
pair->items[0] = mp_obj_new_bytes(key.data, key.size);
pair->items[1] = mp_obj_new_bytes(val.data, val.size);
return pair;
}
}
}
STATIC mp_obj_t btree_subscr(mp_obj_t self_in, mp_obj_t index, mp_obj_t value) {
@ -223,7 +255,9 @@ STATIC const mp_rom_map_elem_t btree_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_get), MP_ROM_PTR(&btree_get_obj) },
{ MP_ROM_QSTR(MP_QSTR_put), MP_ROM_PTR(&btree_put_obj) },
{ MP_ROM_QSTR(MP_QSTR_seq), MP_ROM_PTR(&btree_seq_obj) },
{ MP_ROM_QSTR(MP_QSTR_items), MP_ROM_PTR(&btree_range_obj) },
{ MP_ROM_QSTR(MP_QSTR_keys), MP_ROM_PTR(&btree_keys_obj) },
{ MP_ROM_QSTR(MP_QSTR_values), MP_ROM_PTR(&btree_values_obj) },
{ MP_ROM_QSTR(MP_QSTR_items), MP_ROM_PTR(&btree_items_obj) },
};
STATIC MP_DEFINE_CONST_DICT(btree_locals_dict, btree_locals_dict_table);