Method storeIndex

source/core/StarBTreeDatabase.cpp:581–609

}

auto BTreeDatabase::BTreeImpl::storeIndex(Index index) -> Pointer {
  if (index->self != InvalidBlockIndex) {
    if (!parent->m_uncommitted.contains(index->self)) {
      parent->freeBlock(index->self);
      parent->m_indexCache.remove(index->self);
      index->self = InvalidBlockIndex;
    }
  }

  if (index->self == InvalidBlockIndex)
    index->self = parent->reserveBlock();

  DataStreamBuffer buffer(parent->m_blockSize);
  buffer.writeData(IndexMagic, 2);

  buffer.write<uint8_t>(index->level);
  buffer.write<uint32_t>(index->pointers.size());
  buffer.write<BlockIndex>(*index->beginPointer);
  for (auto i = index->pointers.begin(); i != index->pointers.end(); ++i) {
    starAssert(i->key.size() == parent->m_keySize);
    buffer.writeBytes(i->key);
    buffer.write<BlockIndex>(i->pointer);
  }

  parent->updateBlock(index->self, buffer.data());

  parent->m_indexCache.set(index->self, index);
  return index->self;
}

void BTreeDatabase::BTreeImpl::deleteIndex(Index index) {
  parent->m_indexCache.remove(index->self);