void _reallocate_nodes()

in src/annoylib.h [1299:1317]

• 17 lines of code
• 5 McCabe index (conditional complexity)

  void _reallocate_nodes(S n) {
    const double reallocation_factor = 1.3;
    S new_nodes_size = std::max(n, (S) ((_nodes_size + 1) * reallocation_factor));
    void *old = _nodes;
    
    if (_on_disk) {
      if (!remap_memory_and_truncate(&_nodes, _fd, 
          static_cast<size_t>(_s) * static_cast<size_t>(_nodes_size), 
          static_cast<size_t>(_s) * static_cast<size_t>(new_nodes_size)) && 
          _verbose)
          annoylib_showUpdate("File truncation error\n");
    } else {
      _nodes = realloc(_nodes, _s * new_nodes_size);
      memset((char *) _nodes + (_nodes_size * _s) / sizeof(char), 0, (new_nodes_size - _nodes_size) * _s);
    }
    
    _nodes_size = new_nodes_size;
    if (_verbose) annoylib_showUpdate("Reallocating to %d nodes: old_address=%p, new_address=%p\n", new_nodes_size, old, _nodes);
  }