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% This macro source file is from the four volume series
% "TeX in Practice" by Stephan von Bechtolsheim, published
% 1993 by Springer-Verlag, New York.
% Copyright 1993 Stephan von Bechtolsheim.
% No warranty or liability is assumed.
% This macro may be copied freely if no fees other than
% media cost or shipping charges are charged and as long
% as this copyright and the following source code itself
% is not changed. Please see the series for further information.
%
% Version: 1.0
% Date: May 1, 1993
%
%
% This source code is documented in 3.3.16, p. I-63.
% Original source in file "reg1.TEX", starting line 1835.
\wlog{L: "ntotext.tip" ["reg1.TEX," l. 1835, p. I-63]}%
% This file DOES belong to format "texip."
\InputD{imodn.tip}
\catcode`\@ = 11
\def\@OneDigitNumberText #1#2{%
\ifcase #2\relax
\ifnum #1=0
\else
zero%
\fi
\or
one\or
two\or
three\or
four\or
five\or
six\or
seven\or
eight\or
nine%
\else
\errmessage{\string\@OneDigitNumberText: number
\number#2 out of range.}%
\fi
}
\newcount\@NumberToConvert
\newcount\@NumberToConvertTwo
\newcount\@NumberToConvertAndFlag
\def\NumberToText #1{%
\@NumberToConvert = #1\relax
\ifnum\@NumberToConvert < 0
minus
\@NumberToConvert = -\@NumberToConvert
\fi
\CheckRange{\@NumberToConvert}{0}{999999}%
{\string\NumberToText: numbers >= 1.000.000
not handled.}%
\@NumberToConvertAndFlag = 0
\ifnum\@NumberToConvert > 999
\@NumberToConvertTwo = \@NumberToConvert
\divide\@NumberToConvert by 1000
\@NumberToText
\space thousand and
\IModN{\@NumberToConvertTwo}{1000}{\@NumberToConvert}%
\fi
\CheckRange{\@NumberToConvert}{0}{999}%
{\string\NumberToText: internal error 1}%
\@NumberToText
}
\newcount\@NumberToTextTmp
\def\@NumberToText{%
\ifnum\@NumberToConvert > 99
\ValueOfDecimalPosition{\@NumberToConvert}{2}%
{\@NumberToTextTmp}%
\@OneDigitNumberText{1}{\@NumberToTextTmp}%
\space hundred and
\IModN{\@NumberToConvert}{100}{\@NumberToConvert}%
\fi
\ValueOfDecimalPosition{\@NumberToConvert}{1}%
{\@NumberToTextTmp}%
\ifnum\@NumberToTextTmp > 1
\ifcase\@NumberToTextTmp
\errmessage{\string\@NumberToText:
internal error 1.}%
\or
\errmessage{\string\@NumberToText:
internal error 2.}%
\or
twenty\or
thirty\or
forty\or
fifty\or
sixty\or
seventy\or
eighty\or
ninety%
\else
\errmessage{\string\@NumberToText:
internal error 4.}%
\fi
\IModN{\@NumberToConvert}{10}{\@NumberToTextTmp}%
\@OneDigitNumberText{0}{\@NumberToTextTmp}%
\else
\ifnum\@NumberToTextTmp = 1
\advance\@NumberToConvert by -10
\ifcase\@NumberToConvert
ten\or
eleven\or
twelve\or
thirteen\or
fourteen\or
fifteen\or
sixteen\or
seventeen\or
eighteen\or
nineteen%
\fi
\else
\@OneDigitNumberText{1}{\@NumberToConvert}%
\fi
\fi
}
\catcode`\@ = 12
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