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+%%
+%% This is file `logicproof.sty',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% logicproof.dtx  (with options: `package')
+%% 
+%% This is a generated file.
+%% 
+%% Copyright (C) 2014 by Alan Davidson
+%% This file may be distributed and/or modified under the
+%% conditions of the LaTeX Project Public License, either
+%% version 1.3 of this license or (at your option) any later
+%% version. The latest version of this license is in:
+%% http://www.latex-project.org/lppl.txt
+%% and version 1.3 or later is part of all distributions of
+%% LaTeX version 2005/12/01 or later.
+\NeedsTeXFormat{LaTeX2e}
+\ProvidesPackage{logicproof}[2014/03/20 v1.0 Box proofs for propositional logic]
+\RequirePackage{array}
+\RequirePackage{ifthen}
+\newlength{\subproofhorizspace}
+\setlength{\subproofhorizspace}{0.5em}
+\newlength{\intersubproofvertspace}
+\setlength{\intersubproofvertspace}{0.333em}
+\newcounter{lp@line}% Current line number on the proof
+\newcounter{lp@nested}% Number of nested subproofs we're currently in
+\newcounter{lp@total@nests}% Maximum number of nested subproofs allowed
+\newcounter{lp@cline@1}% Used to draw horizontal lines in subproofs
+\newcounter{lp@cline@2}% Also used to draw horizontal lines in subproofs
+\newcounter{lp@temp}% Temporary storage counter
+\newenvironment{logicproof}[1]{%
+  \setcounter{lp@line}{0}%
+  \setcounter{lp@nested}{0}%
+  \setcounter{lp@total@nests}{#1}%
+  \setlength{\tabcolsep}{0mm}%
+  \let\lp@orig@arraycr\@arraycr%
+  \renewcommand{\@arraycr}{\lp@cr}%
+  \renewcommand{\@currentlabel}{\p@lp@line\thelp@line}%
+  \ifthenelse{%
+    0=#1%
+  }{%
+    \def\lp@tab@format{{r@{~~~}>{$}l<{$}@{~~~~}l}}%
+  }{%
+    \def\lp@tab@format%
+        {{r@{~~~}*{#1}{l}@{~}>{$}l<{$}@{~~~~}l@{~}*{#1}{r}}}
+  }%
+  \center%
+  \expandafter\tabular\lp@tab@format%
+  \lp@start@proof@line%
+}{%
+  \lp@stop@proof@line%
+  \endtabular%
+  \endcenter%
+  \setcounter{lp@total@nests}{0}%
+  \ifthenelse{%
+    0=\value{lp@nested}
+  }{% All is well.
+  }{% There are still open subproofs.
+    \def\@currenvir{subproof}%
+  }
+}
+\newenvironment{subproof}{%
+  \ifthenelse{%
+    \value{lp@total@nests}>\value{lp@nested}%
+  }{% All is well; don't do anything.
+  }{%
+    \PackageError{logicproof}{Too many nested subproofs!}{%
+      Increase the maximum number of nested subproofs allowed
+      in the current logicproof environment.%
+    }%
+  }%
+  \endgroup%
+  \lp@stop@proof@line%
+  \lp@orig@arraycr%
+  \lp@add@space%
+  \lp@go@up@a@line%
+  \stepcounter{lp@nested}%
+  \lp@cr@clines%
+  &%
+  \lp@continue@proof@line%
+}{%
+  \ifthenelse{%
+    0<\value{lp@nested}%
+  }{% All is well; don't do anything.
+  }{%
+    \PackageError{logicproof}{Cannot end a subproof before it begins}{%
+      You must have a \protect\begin{subproof} before you can use %
+      \protect\end{subproof}.%
+    }%
+  }%
+  \lp@stop@proof@line%
+  \lp@cr@clines%
+  \addtocounter{lp@nested}{-1}%
+  \lp@extend@space%
+  \lp@start@proof@line%
+  \begingroup%
+  \def\@currenvir{subproof}%
+}
+\newcommand{\lp@cr}{%
+  \lp@stop@proof@line%
+  \lp@orig@arraycr%
+  \lp@extend@space%
+  \lp@start@proof@line%
+}
+\newcommand{\lp@go@up@a@line}{%
+  \vspace{-\ht\@arstrutbox}%
+  \vspace{-\dp\@arstrutbox}%
+  \vspace{-\intersubproofvertspace}%
+}
+\newcommand{\lp@add@space}{%
+  \lp@extend@space%
+  \vspace{-\ht\@arstrutbox}%
+  \vspace{-\dp\@arstrutbox}%
+  %\vspace{-\intersubproofvertspace}%
+}
+\newcommand{\lp@extend@space}{%
+  \vspace{-\ht\@arstrutbox}%
+  \vspace{-\dp\@arstrutbox}%
+  \vspace{\intersubproofvertspace}%
+  &%
+  \lp@continue@proof@line%
+  &%
+  \lp@stop@proof@line%
+  \lp@orig@arraycr%
+}
+\newcommand{\lp@amper}{&}
+\newcommand{\lp@start@proof@line}{%
+  \stepcounter{lp@line}%
+  \arabic{lp@line}.%
+  &%
+  \lp@continue@proof@line%
+}
+\newcommand{\lp@continue@proof@line}{%
+  \setcounter{lp@temp}{0}%
+  \whiledo{\value{lp@temp}<\value{lp@nested}}{%
+    \vline%
+    \hspace*{\subproofhorizspace}%
+    \lp@amper%
+    \stepcounter{lp@temp}%
+  }%
+  \whiledo{\value{lp@temp}<\value{lp@total@nests}}{%
+    \hspace*{\subproofhorizspace}%
+    \lp@amper%
+    \stepcounter{lp@temp}%
+  }%
+}
+\newcommand{\lp@stop@proof@line}{%
+  \whiledo{\value{lp@temp}>\value{lp@nested}}{%
+    \addtocounter{lp@temp}{-1}%
+    \lp@amper%
+    \hspace*{\subproofhorizspace}%
+  }%
+  \whiledo{\value{lp@temp}>0}{%
+    \addtocounter{lp@temp}{-1}%
+    \lp@amper%
+    \hspace*{\subproofhorizspace}%
+    \vline%
+  }%
+}
+\newcommand{\lp@subtract@from@counter}[2]{%
+  \addtocounter{#2}{-#1}%
+}
+\newcommand{\lp@set@clines}{%
+  \setcounter{lp@cline@1}{\value{lp@nested}}%
+  \stepcounter{lp@cline@1}%
+  \setcounter{lp@cline@2}{\value{lp@total@nests}}%
+  \addtocounter{lp@cline@2}{\value{lp@total@nests}}%
+  \addtocounter{lp@cline@2}{4}%
+  \expandafter\lp@subtract@from@counter\expandafter{%
+      \value{lp@nested}}{lp@cline@2}%
+}
+\newcommand{\lp@cr@clines}{%
+  \lp@set@clines%
+  \lp@orig@arraycr%
+  \cline{\value{lp@cline@1}-\value{lp@cline@2}}%
+}
+\endinput
+%%
+%% End of file `logicproof.sty'.