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% zip.tex
%
% J. Daniel Smith
% 24 May 1990
%
% Modified from a STY file snarfed from someplace else. But I don't
% remember where the original code came from... OOPS!!!
%
% Make a barcode for a ZIP code!
%
% Example usage is below.
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\catcode`@=11 % letter
%
% Dimensions of bars to be used in the barcode
\newdimen\b@rwidth \newdimen\b@rlong \newdimen\b@rshort \newdimen\b@rsep
\b@rwidth=0.02true in \b@rlong=0.125true in \b@rshort=0.05true in
\b@rsep=0.0275true in
\def\sb@r{\vrule height\b@rshort width\b@rwidth depth0pt \kern\b@rsep}
\def\lb@r{\vrule height\b@rlong width\b@rwidth depth0pt \kern\b@rsep}
% The barcodes for each digit
\def\zerob@r{\lb@r\lb@r\sb@r\sb@r\sb@r}
\def\oneb@r{\sb@r\sb@r\sb@r\lb@r\lb@r}
\def\twob@r{\sb@r\sb@r\lb@r\sb@r\lb@r}
\def\threeb@r{\sb@r\sb@r\lb@r\lb@r\sb@r}
\def\fourb@r{\sb@r\lb@r\sb@r\sb@r\lb@r}
\def\fiveb@r{\sb@r\lb@r\sb@r\lb@r\sb@r}
\def\sixb@r{\sb@r\lb@r\lb@r\sb@r\sb@r}
\def\sevenb@r{\lb@r\sb@r\sb@r\sb@r\lb@r}
\def\eightb@r{\lb@r\sb@r\sb@r\lb@r\sb@r}
\def\nineb@r{\lb@r\sb@r\lb@r\sb@r\sb@r}
\newcount\zipb@rm
\newcount\zipb@rn
\chardef\ten=10
%Almost like using \ifcase... except `-' is ignored.
\def\zipb@r@@@#1#2{\expandafter\def\csname zipb@r@@#1\endcsname%
{#2\advance\zipb@rn#1\relax}}
\newbox\zipbarcode
\zipb@r@@@0{\global\setbox\zipbarcode\hbox{\box\zipbarcode\zerob@r}}
\zipb@r@@@1{\global\setbox\zipbarcode\hbox{\box\zipbarcode\oneb@r}}
\zipb@r@@@2{\global\setbox\zipbarcode\hbox{\box\zipbarcode\twob@r}}
\zipb@r@@@3{\global\setbox\zipbarcode\hbox{\box\zipbarcode\threeb@r}}
\zipb@r@@@4{\global\setbox\zipbarcode\hbox{\box\zipbarcode\fourb@r}}
\zipb@r@@@5{\global\setbox\zipbarcode\hbox{\box\zipbarcode\fiveb@r}}
\zipb@r@@@6{\global\setbox\zipbarcode\hbox{\box\zipbarcode\sixb@r}}
\zipb@r@@@7{\global\setbox\zipbarcode\hbox{\box\zipbarcode\sevenb@r}}
\zipb@r@@@8{\global\setbox\zipbarcode\hbox{\box\zipbarcode\eightb@r}}
\zipb@r@@@9{\global\setbox\zipbarcode\hbox{\box\zipbarcode\nineb@r}}
\def\zipb@r@@#1{\csname zipb@r@@#1\endcsname}
\def\zipb@r@#1{\ifx#1\null
\let\next\relax
\else
\zipb@r@@{#1}#1%
\let\next\zipb@r@
\fi
\next}
\def\zipbar#1{\setbox\zipbarcode=\null
\hbox{ % put numbers in an \hbox
\global\setbox\zipbarcode\hbox{\box\zipbarcode\lb@r} % start with long bar
\zipb@rn\z@\zipb@r@#1\null
\zipb@rm\zipb@rn \divide\zipb@rm\ten \multiply\zipb@rm\ten
\advance\zipb@rm-\zipb@rn
\ifnum\zipb@rm<0
\advance\zipb@rm\ten
\fi
\zipb@r@@{\the\zipb@rm} % last digit, so that the sum is divisible by ten
\global\setbox\zipbarcode\hbox{\box\zipbarcode\lb@r}% end with a long bar
} % end of \hbox
}
\catcode`@=12 % disable private sequences
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%\zipbar{1234567890}
%
%\zipbar{48837}
%
%\zipbar{78653--0102}
%\bye
\endinput
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