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%% grabtexdata.tex (from oxford.tex)
%% RWD Nickalls (c) Jan 2005
%% for extracting data into mathspic var commands
%%========================================
\scrollmode % prevent LaTeX stopping if there are errors
%---------------------
% make a print command macro
\newcommand{\print}[1]{\immediate\write\outfile{#1}}
%---------------------
% make a comment % command macro
% first need to define percentchar for the write statement
% (From "TeX for the Impatient" (1990), p 292)
{\catcode`\%=12 \global\def\percentchar{%}}%
\newcommand{\comment}{\percentchar\space}
%
% make a \macro command --> %def<space>
\newcommand{\mydef}{def}
\newcommand{\macro}{\percentchar\mydef\space}
%----------------------
% create and open a new file with filename = textfiledata.dat
\newwrite\outfile
\immediate\openout\outfile=texfiledata.dat
%----------------------
%% write file header & general info
\print{\percentchar\percentchar\space file: texdata.dat}
\print{\percentchar\percentchar\space accessing TeX parameter values}
%---------------------
%% now get \textwidth and \textheight values from the tex file
\print{\comment ============}
\print{var w555 = \number\textwidth\comment\textwidth=scaled points}
\print{var w556 = \number\textwidth\comment\textwidth=\the\textwidth}
\print{var w557 = \number\textwidth/1864679.8\comment (\textwidth in cms)}
\print{\macro textwidthcms()\number\textwidth/1864679.8\comment}
\print{\macro textheightcms()\number\textheight/1864679.8\comment}
\print{\comment ============}
%--------------------
% close the file
\immediate\closeout\outfile
%%=========end=========================
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