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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'.
|
