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diff --git a/graphics/pgf/base/tex/generic/frontendlayer/tikz/libraries/tikzlibrarypetri.code.tex b/graphics/pgf/base/tex/generic/frontendlayer/tikz/libraries/tikzlibrarypetri.code.tex
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+% Copyright 2018 by Till Tantau
+%
+% This file may be distributed and/or modified
+%
+% 1. under the LaTeX Project Public License and/or
+% 2. under the GNU Public License.
+%
+% See the file doc/generic/pgf/licenses/LICENSE for more details.
+
+\ProvidesFileRCS{tikzlibrarypetri.code.tex}
+
+
+% Styles for places:
+
+\tikzset{every place/.style= {}}%
+\tikzset{place/.style= {circle,draw,inner sep=0pt,
+ minimum size=5ex,
+ every place}}%
+
+
+% Styles for transition:
+
+\tikzset{every transition/.style= {}}%
+\tikzset{transition/.style= {rectangle,draw,inner sep=0pt,
+ minimum size=4mm,
+ every transition}}%
+
+
+% Styles for relationship types:
+
+\tikzset{pre/.style= {<-,shorten <=1pt}}%
+\tikzset{post/.style= {->,shorten >=1pt}}%
+\tikzset{pre and post/.style= {<->,shorten >=1pt,shorten <=1pt}}%
+
+
+
+% Styles for marks:
+
+\tikzset{every token/.style= {}}%
+\tikzset{token/.style= {fill=black,draw=none,circle,
+ inner sep=0.5pt,minimum size=1ex,
+ text=white,font=\pgfutil@font@tiny,every token}}%
+
+\tikzoption{token distance}{\def\tikz@token@distance{#1}}%
+\def\tikz@token@distance{1.5ex}%
+
+\tikzset{children are tokens/.style= {growth function=\tikz@grow@tokens,edge from parent path=}}%
+
+\tikzoption{tokens}{%
+ \ifnum#1>0\relax%
+ \tikzset{append after command={}
+ {[children are tokens]child foreach \tikz@dummy in {1,...,#1} {node[token]{}}}}%
+ \fi}%
+
+\tikzoption{colored tokens}{%
+ \tikzset{append after command={}%
+ {[children are tokens]child foreach \tikz@child@color in {#1} {node[token,\tikz@child@color]{}}}}%
+ }%
+
+\tikzoption{structured tokens}{%
+ \tikzset{append after command={}%
+ {[children are tokens]child foreach \tikzpetrichildname in {#1} {node[token]{\tikzpetrichildname}}}}%
+ }%
+
+
+\def\tikz@grow@tokens{%
+ \pgfmathsetlength{\pgf@xa}{\tikz@token@distance}%
+ \pgfmathsetlength{\pgf@ya}{\tikz@token@distance}%
+ \pgf@xc=0pt%
+ \pgf@yc=0pt%
+ \csname tikz@grow@tokens@placer@\the\tikznumberofchildren @\the\tikznumberofcurrentchild\endcsname%
+ \pgftransformshift{\pgfqpoint{\pgf@xc}{\pgf@yc}}%
+}%
+
+\def\tikz@def@grow@tokens#1#2#3#4{%
+ \expandafter\def\csname tikz@grow@tokens@placer@#1@#2\endcsname{%
+ \pgf@xc=#3\pgf@xa%
+ \pgf@yc=#4\pgf@ya}%
+}%
+
+
+% Single token
+\tikz@def@grow@tokens{1}{1}{0}{0}%
+
+% Two tokens
+\tikz@def@grow@tokens{2}{1}{-.5}{0}%
+\tikz@def@grow@tokens{2}{2}{.5}{0}%
+
+% Three tokens
+\tikz@def@grow@tokens{3}{1}{0} {0.57}%
+\tikz@def@grow@tokens{3}{2}{-.5}{-.306025}%
+\tikz@def@grow@tokens{3}{3}{.5} {-.306025}%
+
+% Four tokens
+\tikz@def@grow@tokens{4}{1}{-.5}{.5}%
+\tikz@def@grow@tokens{4}{2}{.5}{.5}%
+\tikz@def@grow@tokens{4}{3}{-.5}{-.5}%
+\tikz@def@grow@tokens{4}{4}{.5}{-.5}%
+
+% Five tokens
+\tikz@def@grow@tokens{5}{1}{0}{.85}%
+\tikz@def@grow@tokens{5}{2}{-0.808398}{0.26266}%
+\tikz@def@grow@tokens{5}{3}{0.808398}{0.26266}%
+\tikz@def@grow@tokens{5}{4}{-0.499617}{-0.687664}%
+\tikz@def@grow@tokens{5}{5}{0.499617}{-0.687664}%
+
+% Six tokens
+\tikz@def@grow@tokens{6}{1}{-1}{.5}%
+\tikz@def@grow@tokens{6}{2}{0}{.5}%
+\tikz@def@grow@tokens{6}{3}{1}{.5}%
+\tikz@def@grow@tokens{6}{4}{-1}{-.5}%
+\tikz@def@grow@tokens{6}{5}{0}{-.5}%
+\tikz@def@grow@tokens{6}{6}{1}{-.5}%
+
+% Seven tokens
+\tikz@def@grow@tokens{7}{1}{0}{1}%
+\tikz@def@grow@tokens{7}{2}{-1}{.5}%
+\tikz@def@grow@tokens{7}{3}{0}{0}%
+\tikz@def@grow@tokens{7}{4}{1}{.5}%
+\tikz@def@grow@tokens{7}{5}{-1}{-.5}%
+\tikz@def@grow@tokens{7}{6}{0}{-1}%
+\tikz@def@grow@tokens{7}{7}{1}{-.5}%
+
+% Eight tokens
+\tikz@def@grow@tokens{8}{1}{-.5}{1}%
+\tikz@def@grow@tokens{8}{2}{.5}{1}%
+\tikz@def@grow@tokens{8}{3}{-1}{0}%
+\tikz@def@grow@tokens{8}{4}{0}{0}%
+\tikz@def@grow@tokens{8}{5}{1}{0}%
+\tikz@def@grow@tokens{8}{6}{-1}{-1}%
+\tikz@def@grow@tokens{8}{7}{0}{-1}%
+\tikz@def@grow@tokens{8}{8}{1}{-1}%
+
+% Eight tokens
+\tikz@def@grow@tokens{9}{1}{-1}{1}%
+\tikz@def@grow@tokens{9}{2}{0}{1}%
+\tikz@def@grow@tokens{9}{3}{1}{1}%
+\tikz@def@grow@tokens{9}{4}{-1}{0}%
+\tikz@def@grow@tokens{9}{5}{0}{0}%
+\tikz@def@grow@tokens{9}{6}{1}{0}%
+\tikz@def@grow@tokens{9}{7}{-1}{-1}%
+\tikz@def@grow@tokens{9}{8}{0}{-1}%
+\tikz@def@grow@tokens{9}{9}{1}{-1}%
+
+
+\endinput