example.tex

\documentclass[12pt, a4paper]{article}

%\usepackage[ehirecordpointers]{exthashidx}
\usepackage{exthashidx}

%\usepackage[lhirecordpointers]{linhashidx}
\usepackage{linhashidx}

\begin{document}

\begin{figure}[!ht]
  \begin{center}
    \scalebox{0.8}{
      \begin{tikzpicture}
        % directory
        \xyshift{+00mm}{+00mm}{\exthashidxdirectoryeight{directory}{3}}
        % buckets
        \xyshift{+20mm}{+50mm}{\exthashidxbucketfour{A}{3}{}{}{64}{16}}
        \xyshift{+20mm}{+25mm}{\exthashidxbucketfour{B}{2}{1}{5}{21}{}}
        \xyshift{+20mm}{+00mm}{\exthashidxbucketfour{C}{2}{10}{}{}{}}
        \xyshift{+20mm}{-25mm}{\exthashidxbucketfour{D}{2}{15}{7}{51}{}}
        \xyshift{+20mm}{-50mm}{\exthashidxbucketfour{A2}{3}{4}{12}{20}{36}}
        % links
        \exthashidxlink{directory-000}{A}
        \exthashidxlink{directory-001}{B}
        \exthashidxlink{directory-010}{C}
        \exthashidxlink{directory-011}{D}
        \exthashidxlink{directory-100}{A2}
        \exthashidxlink{directory-101}{B}
        \exthashidxlink{directory-110}{C}
        \exthashidxlink{directory-111}{D}
      \end{tikzpicture}
    }
  \end{center}
  \caption{\textit{Extendible Hashing} Index}
\end{figure}

\begin{figure}[!ht]
  \begin{center}
    \scalebox{0.8}{
      \begin{tikzpicture}
        \linhashidxtwo{idx}{0}{
          \linhashidxtwoentry{000}{00}{
            \linhashidxbucketfour{b1}{32}{8}{24}{}
            \linhashidxnullptrfour{b1}
          }
          \linhashidxtwoentry{001}{01}{
            \linhashidxbucketfour{b2}{9}{25}{41}{17}
            \linhashidxnullptrfour{b2}
            \linhashidxnext{b2}{1}
          }
          \linhashidxtwoentry{010}{10}{
            \linhashidxbucketfour{b3}{14}{18}{10}{30}
            %\linhashidxnullptr{b3}
            \xyshift{11.5em}{0em}{\linhashidxbucketfour{o3}{42}{}{}{}}
            \linhashidxlink{b3}{o3}
            \linhashidxnullptrfour{o3}
          }
          \linhashidxtwoentry{011}{11}{
            \linhashidxbucketfour{b4}{31}{35}{7}{11}
            \linhashidxnullptrfour{b4}
          }
          \linhashidxtwoentry{100}{00}{
            \linhashidxbucketfour{b5}{44}{36}{}{}
            \linhashidxnullptrfour{b5}
          }
        }
      \end{tikzpicture}
    }
  \end{center}
  \caption{\textit{Linear Hashing} Index}
\end{figure}

\end{document}