示例#1
0
  Object* LookupTable::store(STATE, Object* key, Object* val) {
    unsigned int num_entries, num_bins, bin;
    LookupTableBucket* entry;
    LookupTableBucket* last = NULL;

    num_entries = entries_->to_native();
    num_bins = bins_->to_native();

    if(max_density_p(num_entries, num_bins)) {
      redistribute(state, num_bins <<= 1);
    }

    key_to_sym(key);
    bin = find_bin(key_hash(key), num_bins);
    entry = try_as<LookupTableBucket>(values_->at(state, bin));

    while(entry) {
      if(entry->key() == key) {
        entry->value(state, val);
        return val;
      }
      last = entry;
      entry = try_as<LookupTableBucket>(entry->next());
    }

    if(last) {
      last->next(state, LookupTableBucket::create(state, key, val));
    } else {
      values_->put(state, bin, LookupTableBucket::create(state, key, val));
    }

    entries(state, Fixnum::from(num_entries + 1));
    return val;
  }
示例#2
0
  Object* LookupTable::remove(STATE, Object* key, bool* removed) {
    hashval bin;
    LookupTableBucket* entry;
    LookupTableBucket* last = NULL;

    size_t num_entries = entries_->to_native();
    size_t num_bins = bins_->to_native();

    if(min_density_p(num_entries, num_bins) && (num_bins >> 1) >= LOOKUPTABLE_MIN_SIZE) {
      redistribute(state, num_bins >>= 1);
    }

    key_to_sym(key);
    bin = find_bin(key_hash(key), num_bins);
    entry = try_as<LookupTableBucket>(values_->at(state, bin));

    while(entry) {
      if(entry->key() == key) {
        Object *val = entry->value();
        if(last) {
          last->next(state, entry->next());
        } else {
          values_->put(state, bin, entry->next());
        }
        entries(state, Fixnum::from(entries_->to_native() - 1));
        if(removed) *removed = true;
        return val;
      }

      last = entry;
      entry = try_as<LookupTableBucket>(entry->next());
    }

    return Qnil;
  }
示例#3
0
  void LookupTable::redistribute(STATE, size_t size) {
    size_t num = bins_->to_native();
    Tuple* new_values = Tuple::create(state, size);

    for(size_t i = 0; i < num; i++) {
      LookupTableBucket* entry = try_as<LookupTableBucket>(values_->at(state, i));

      while(entry) {
        LookupTableBucket* link = try_as<LookupTableBucket>(entry->next());
        entry->next(state, reinterpret_cast<LookupTableBucket *>(Qnil));

        size_t bin = find_bin(key_hash(entry->key()), size);
        LookupTableBucket* slot = try_as<LookupTableBucket>(new_values->at(state, bin));

        if(slot) {
          slot->append(state, entry);
        } else {
          new_values->put(state, bin, entry);
        }

        entry = link;
      }
    }

    values(state, new_values);
    bins(state, Fixnum::from(size));
  }
示例#4
0
  LookupTableBucket* LookupTableBucket::create(STATE, Object *key, Object *value) {
    LookupTableBucket *entry =
      state->new_object<LookupTableBucket>(G(lookuptablebucket));

    entry->key(state, key);
    entry->value(state, value);
    return entry;
  }
  void test_find_entry() {
    Object* k = Fixnum::from(47);
    tbl->store(state, k, cTrue);

    LookupTableBucket* entry = tbl->find_entry(state, k);
    TS_ASSERT(entry != cNil);
    TS_ASSERT_EQUALS(entry->key(),k);
    TS_ASSERT_EQUALS(entry->value(),cTrue);

    entry = tbl->find_entry(state, Fixnum::from(40));
    TS_ASSERT(entry == cNil);
  }
示例#6
0
  LookupTableBucket* LookupTable::find_entry(STATE, Object* key) {
    unsigned int bin;

    key_to_sym(key);
    bin = find_bin(key_hash(key), bins_->to_native());
    LookupTableBucket *entry = try_as<LookupTableBucket>(values_->at(state, bin));

    while(entry) {
      if(entry->key() == key) {
        return entry;
      }
      entry = try_as<LookupTableBucket>(entry->next());
    }
    return reinterpret_cast<LookupTableBucket *>(Qnil);
  }
示例#7
0
  LookupTable* LookupTable::duplicate(STATE) {
    size_t size, i;
    LookupTable *dup;

    size = bins_->to_native();
    dup = LookupTable::create(state, size);

    // Allow for subclassing.
    dup->klass(state, class_object(state));

    size_t num = entries_->to_native();

    Array* entries = all_entries(state);
    for(i = 0; i < num; i++) {
      LookupTableBucket* entry = as<LookupTableBucket>(entries->get(state, i));
      dup->store(state, entry->key(), entry->value());
    }
    return dup;
  }
  void test_store_handles_entries_in_same_bin() {
    Object* k1 = Fixnum::from((4 << 4)  | 15);
    Object* k2 = Fixnum::from((10 << 4) | 15);
    Object* k3 = Fixnum::from((11 << 4) | 15);
    Object* v1 = cTrue;
    Object* v2 = cFalse;
    Object* v3 = cTrue;

    tbl->store(state, k1, v1);
    tbl->store(state, k2, v2);
    tbl->store(state, k3, v3);
    TS_ASSERT_EQUALS(as<Integer>(tbl->entries())->to_native(), 3);

    LookupTableBucket* entry = tbl->find_entry(state, k1);
    TS_ASSERT(entry != cNil);

    TS_ASSERT(entry->next() != cNil);
    TS_ASSERT_EQUALS(entry->next()->key(), k2);

    entry = tbl->find_entry(state, k3);
    TS_ASSERT(entry != cNil);
    TS_ASSERT_EQUALS(entry->key(), k3);
  }