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-%%
-%% This is file `answers.sty',
-%% generated with the docstrip utility.
-%%
-%% The original source files were:
-%%
-%% answers.dtx (with options: `answers')
-%%
-%% Copyright (C) 1990,1994 Mike Piff, University of Sheffield, England
-%%
-%% You are not allowed to change this file.
-%%
-%% You are NOT ALLOWED to distribute this file alone. You are NOT
-%% ALLOWED to take money for the distribution or use of this
-%% file except for a nominal charge for copying etc.
-%%
-%% Please address any problems to:
-%%
-%% M.Piff@shef.ac.uk
-%%
-%% For updates, contact your nearest CTAN site.
-%%
-\def\fileversion{2.10}
-\def\filedate{16 Dec 1997 17:05:29 BST}
-\def\filename{answers.dtx}
-\def\Copyright{Copyright (C) 1990,1994 Mike Piff,
- University of Sheffield, England}
-\NeedsTeXFormat{LaTeX2e}[1996/06/01]
-\ProvidesPackage{answers}[1996/07/10]
-\typeout{Package `answers' <\filedate>.}
-\typeout{\Copyright}
-\newif\ifanswerfiles \answerfilestrue
-\DeclareOption{nosolutionfiles}{\answerfilesfalse
- \typeout{No answer files being produced}}%
-\ProcessOptions
-
-\RequirePackage{verbatim}
-\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{%
- \immediate\write\@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\@namedef{#1params}{{\Currentlabel}}%
- \newenvironment{#1}[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'.