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Merge pull request #431 from pfalcon/unbreak-map-remove 

map: When removing a key, don't NULL the entry, but mark as deleted.
This commit is contained in:
Damien George 2014-04-05 12:09:09 +01:00
parent 586bfce10d 4a088f4b61
commit 3c8aecf62c
1 changed files with 9 additions and 5 deletions
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14
py/map.c
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@ -127,17 +127,20 @@ mp_map_elem_t* mp_map_lookup(mp_map_t *map, mp_obj_t index, mp_map_lookup_kind_t
mp_map_rehash(map);
// restart the search for the new element
pos = hash % map->alloc;
continue;
} else {
map->used += 1;
elem->key = index;
elem->value = NULL;
if (!MP_OBJ_IS_QSTR(index)) {
map->all_keys_are_qstrs = 0;
}
return elem;
}
} else {
} else if (elem->value == NULL) {
return NULL;
}
// Otherwise it's just entry marked as deleted, so continue with next one
} else if (elem->key == index || (!map->all_keys_are_qstrs && mp_obj_equal(elem->key, index))) {
// found it
/* it seems CPython does not replace the index; try x={True:'true'};x[1]='one';x
@ -152,14 +155,15 @@ mp_map_elem_t* mp_map_lookup(mp_map_t *map, mp_obj_t index, mp_map_lookup_kind_t
retval->key = elem->key;
retval->value = elem->value;
elem->key = NULL;
elem->value = NULL;
// elem->key = NULL && elem->value != NULL means "marked deleted"
// assume value indeed never NULL
return retval;
}
return elem;
} else {
// not yet found, keep searching in this table
pos = (pos + 1) % map->alloc;
}
// not yet found, keep searching in this table
pos = (pos + 1) % map->alloc;
}
}