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%%
%% This is file `answers.sty',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% answers.dtx (with options: `answers')
%%
%% Originally developed by Mike Piff
%% Copyright (C) 1990,1994-1996 by Mike Piff
%% Copyright (C) 2009 by
%% Joseph Wright <joseph.wright@morningstar2.co.uk>
%%
%% It may be distributed and/or modified under the conditions of
%% the LaTeX Project Public License (LPPL), either version 1.3c of
%% this license or (at your option) any later version. The latest
%% version of this license is in the file:
%%
%% http://www.latex-project.org/lppl.txt
%%
%% This work is "maintained" (as per LPPL maintenance status) by
%% Joseph Wright.
%%
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{answers}
[2014/08/24 v2.16 Production of solution sheets in LaTeX2e]
\newif\ifanswerfiles \answerfilestrue
\DeclareOption{nosolutionfiles}{\answerfilesfalse
\typeout{No answer files being produced}}%
\ProcessOptions
\RequirePackage{verbatim}
\long\def\protected@iwrite#1#2#3{%
\begingroup
\let\thepage\relax
#2%
\let\protect\@unexpandable@protect
\edef \reserved@a{\immediate\write#1{#3}}%
\reserved@a
\endgroup
\if@nobreak
\ifvmode
\nobreak
\fi
\fi
}
\newcommand{\solutionpoint}{.}
\newcommand{\solutionextension}{tex}
\newenvironment{Filesave}[1]{%
\@bsphack
\def\verbatim@processline{}%
\Iffileundefined{#1}{}{%
\Ifopen{#1}{%
\def\verbatim@processline{%
\Ifanswerfiles{%
\immediate\write\@nameuse{#1@file}%
{\the\verbatim@line}%
}{}%
}%
}{}%
}%
\let\do\@makeother\dospecials
\catcode`\^^M\active \catcode`\^^I=12\relax
\verbatim@start
}{\@esphack}
\newcommand{\Writetofile}[2]{%
\@bsphack
\Iffileundefined{#1}{}{%
\Ifopen{#1}{%
{%
\let\protect\string
\Ifanswerfiles{%
\protected@iwrite{\@nameuse{#1@file}}{}{#2}%
}{}%
}%
}{}%
}%
\@esphack
}
\newcommand{\Ifopen}[3]{%
\csname if#1open\endcsname#2\else#3\fi}%
\newcommand{\Iffileundefined}[3]{%
\csname ifx\expandafter\endcsname
\csname #1@file\endcsname\relax
#2\else#3\fi}
\newcommand{\Ifanswerfiles}[2]{%
\ifanswerfiles #1\else #2\fi}
\def\Opensolutionfile#1{%
\@ifnextchar[{\define@filename{#1}}%
{\define@filename{#1}[#1]}}%
\def\define@filename#1[#2]{%
\global\@namedef{#1@filename}{#2\solutionpoint\solutionextension}%
\Ifanswerfiles{%
\typeout{Output from handle #1 going
to #2.\solutionextension}%
}{}%
\Iffileundefined{#1}{%
\expandafter\newwrite\csname #1@file\endcsname
\csname newif\expandafter\endcsname
\csname if#1open\endcsname
\global\csname #1openfalse\endcsname
\expandafter\ifx\csname Open#1hook\endcsname\relax
\global\@namedef{Open#1hook}##1{}%
\fi
\expandafter\ifx\csname Close#1hook\endcsname\relax
\global\@namedef{Close#1hook}##1{}%
\fi
}{}%
\let\Tmp\relax
\Ifopen{#1}{\typeout{File #1 already open}}{%
\Ifanswerfiles{%
\immediate\openout\@nameuse{#1@file}=%
\@nameuse{#1@filename}%
}{}%
\global\csname#1opentrue\endcsname
\def\Tmp{\@nameuse{Open#1hook}{#1}}%
}%
\Tmp
}
\def\Closesolutionfile#1{%
\let\Tmp\relax
\Iffileundefined{#1}{}{%
\Ifopen{#1}{%
\Ifanswerfiles{%
\immediate\closeout\@nameuse{#1@file}%
}{}%
\global\csname #1openfalse\endcsname
\def\Tmp{\@nameuse{Close#1hook}{#1}}%
}{}%
}%
\Tmp
}
\def\Readsolutionfile#1{%
\Ifanswerfiles{%
\Iffileundefined{#1}{}{%
\Ifopen{#1}{%
\typeout{WARNING: attempt to read open file #1}%
}{%
\edef\Tmp{%
\noexpand\InputIfFileExists
{\@nameuse{#1@filename}}{}%
{\noexpand\message{File
\@nameuse{#1@filename}%
\space not found}}%
}%
\Tmp
}%
}%
}{}%
}
\newcommand{\Newassociation}[3]{%
\newsolution{#2}%
\expandafter\ifx\csname #3opentrue\endcsname\relax
\expandafter\newif\csname if#3open\endcsname
\fi
\newenvironment{#1}{%
\Ifanswerfiles{%
\let\Tmp\relax
\Iffileundefined{#3}{}{%
\Ifopen{#3}{%
\immediate\write\@nameuse{#3@file}%
{\string\begin{#2}\@nameuse{#2params}}%
\def\Tmp{\Filesave{#3}}%
}{}%
}%
}{%
\edef\Tmp{\noexpand\begin{#2}\@nameuse{#2params}}%
}%
\csname pre#1\endcsname
\Tmp
}%
{%
\Ifanswerfiles{%
\Iffileundefined{#3}{}{%
\Ifopen{#3}{%
\endFilesave%
\immediate\write\@nameuse{#3@file}%
{\string\end{#2}}%
\csname post#1\endcsname
}{}%
}%
}{%
\end{#2}%
}%
}%
}
\newcommand{\newsolution}[1]{%
\@ifundefined{#1}{%
\global\@definecounter{#1}%
\global\@namedef{#1params}{{\Currentlabel}}%
\newenvironment{#1}[1]%
{%
\refstepcounter{#1}%
\csname pre#1\endcsname
\trivlist
\item[\hskip\itemsep{\@nameuse{#1label}{##1}}]}%
{\csname post#1\endcsname\endtrivlist}%
\global\@namedef{#1label}##1{\solutionstyle{##1}}%
}{\typeout{WARNING: environment #1 already in use}}%
}
\newcommand{\solutionstyle}[1]{\textbf{#1}}
\newcommand{\Currentlabel}{\@currentlabel}
\endinput
%%
%% End of file `answers.sty'.
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