131 lines
4.1 KiB
TeX
131 lines
4.1 KiB
TeX
%% Last Modified: Thu Oct 18 18:26:25 2007.
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\NeedsTeXFormat{LaTeX2e}
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\ProvidesPackage{style/btree}
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\typeout{Document Style `weiw_BTree - Support drawing B+-Tree (ver 0.999)}
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\RequirePackage{tikz}
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\RequirePackage{ifthen}
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% use libraries
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\usetikzlibrary{arrows,shapes,decorations,matrix}
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%% global declaration
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\tikzstyle{btreeptr} = [draw, semithick, minimum height=2em]
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\tikzstyle{btreeval} = [draw, semithick, minimum size=2em]
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\tikzstyle{btreevale} = [draw,semithick, minimum size=2em]
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\tikzstyle{btlink} = [draw, semithick, ->, >=triangle 45]
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%% macro
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%% helper macros
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\newcommand{\suppressemptystr}[1]{% leave blank for entries in leaf nodes
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\ifthenelse{\equal{#1}{}}%
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{%
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\relax%
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}%
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% Else
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{%
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#1\textsuperscript{*}%
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}%
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}%
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\newcommand{\xyshift}[3]{% help to place the nodes
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\begin{scope}[xshift=#1, yshift=#2]
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#3
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\end{scope}%
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}
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%% Common btree macros
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\newcommand{\btreelink}[2]{% #1: src node; #2: dest node;
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\draw[btlink] ([yshift=3pt] #1.south) -- (#2-b.north);
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}
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\newcommand{\btreelinknorth}[2]{% #1: src node; #2: dest node;
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\draw[btlink] ([yshift=3pt] #1.south) -- (#2.north);
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}
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\newcommand{\btreetriangle}[2]{% #1: node name; #2 text inside
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\node[anchor=north, regular polygon, regular polygon sides=3, draw] (#1) {#2};
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}
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%%======================================================================
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%% btree with capacity = 4
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\newcommand{\btreeinodefour}[5]{%
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\matrix [ampersand replacement=\&] (#1)
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{
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\node[btreeptr] (#1-1) {\vphantom{1}}; \& \node[btreeval] (#1-a) {#2}; \&
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\node[btreeptr] (#1-2) {\vphantom{1}}; \& \node[btreeval] (#1-b) {#3}; \&
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\node[btreeptr] (#1-3) {\vphantom{1}}; \& \node[btreeval] (#1-c) {#4}; \&
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\node[btreeptr] (#1-4) {\vphantom{1}}; \& \node[btreeval] (#1-d) {#5}; \&
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\node[btreeptr] (#1-5) {\vphantom{1}}; \\
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};
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}
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\newcommand{\btreelnodefour}[5]{%
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\matrix [ampersand replacement=\&, outer sep=0pt, matrix anchor=north] (#1)
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{
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\node[btreevale] (#1-a) {\suppressemptystr{#2}}; \&
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\node[btreevale] (#1-b) {\suppressemptystr{#3}}; \&
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\node[btreevale] (#1-c) {\suppressemptystr{#4}}; \&
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\node[btreevale] (#1-d) {\suppressemptystr{#5}}; \\
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};
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}
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%%======================================================================
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%% btree with capacity = 3
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\newcommand{\btreeinodethree}[4]{%
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\matrix [ampersand replacement=\&] (#1)
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{
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\node[btreeptr] (#1-1) {\vphantom{1}}; \& \node[btreeval] (#1-a) {#2}; \&
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\node[btreeptr] (#1-2) {\vphantom{1}}; \& \node[btreeval] (#1-b) {#3}; \&
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\node[btreeptr] (#1-3) {\vphantom{1}}; \& \node[btreeval] (#1-c) {#4}; \&
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\node[btreeptr] (#1-4) {\vphantom{1}}; \\
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};
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}
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\newcommand{\btreelnodethree}[4]{%
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\matrix [ampersand replacement=\&, outer sep=0pt, matrix anchor=north] (#1)
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{
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\node[btreevale] (#1-a) {\suppressemptystr{#2}}; \&
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\node[btreevale] (#1-b) {\suppressemptystr{#3}}; \&
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\node[btreevale] (#1-c) {\suppressemptystr{#4}}; \\
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};
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}
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%%======================================================================
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%% btree with capacity = 2
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\newcommand{\btreeinodetwo}[4]{%
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\matrix [ampersand replacement=\&] (#1)
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{
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\node[btreeptr] (#1-1) {\vphantom{1}}; \& \node[btreeval] (#1-a) {#2}; \&
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\node[btreeptr] (#1-2) {\vphantom{1}}; \& \node[btreeval] (#1-b) {#3}; \&
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\node[btreeptr] (#1-3) {\vphantom{1}}; \\
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};
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}
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\newcommand{\btreelnodetwo}[3]{%
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\matrix [ampersand replacement=\&, outer sep=0pt, matrix anchor=north] (#1)
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{
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\node[btreevale] (#1-a) {\suppressemptystr{#2}}; \&
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\node[btreevale] (#1-b) {\suppressemptystr{#3}}; \\
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};
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}
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%%======================================================================
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%% simple example
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% \begin{center}
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% \scalebox{0.7}{
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% \begin{tikzpicture}
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% %
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% \btreeinodefour{root}{13}{17}{24}{30};
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% \xyshift{-40mm}{-20mm}{\btreelnodefour{n1}{2}{3}{5}{7}}
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% \xyshift{-0mm}{-20mm}{\btreelnodefour{n2}{14}{16}{}{}}
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% \xyshift{40mm}{-20mm}{\btreelnodefour{n3}{19}{20}{22}{}}
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% \xyshift{80mm}{-20mm}{\btreelnodefour{n4}{24}{27}{29}{}}
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% \xyshift{120mm}{-20mm}{\btreelnodefour{n5}{33}{34}{38}{39}}
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% %
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% \foreach \x in {1,2,...,5} { \btreelink{root-\x}{n\x} }
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% \end{tikzpicture}
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% }
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% \end{center} |