Meeting Pearls 3/Meeting_Pearls_III.iso/Pearls/texmf/inputs/latex/unpacked/ifthen.sty

Text File | 1995-06-21 | 5.8 KB | 165 lines

%%
%% This is file `ifthen.sty', generated
%% on <1995/6/21> with the docstrip utility (2.2i).
%%
%% The original source files were:
%%
%% ifthen.dtx  (with options: `package')
%%
%%
%% This is a generated file.
%%
%% Copyright 1993-1995 the LaTeX3 project and any individual authors
%% listed elsewhere in this file. All rights reserved.
%%
%% For further copyright information see the file legal.txt, and any
%% other copyright notices in this file.
%%
%% This file is part of the LaTeX2e system.
%% ----------------------------------------
%% This system is distributed in the hope that it will be useful,
%% but WITHOUT ANY WARRANTY; without even the implied warranty of
%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
%%
%% For error reports concerning UNCHANGED versions of this file no more
%% than one year old, see bugs.txt.
%%
%% Please do not request updates from us directly. Primary
%% distribution is through the CTAN archives.
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%% IMPORTANT COPYRIGHT NOTICE:
%%
%% You are NOT ALLOWED to distribute this file alone.
%%
%% You are allowed to distribute this file under the condition that it is
%% distributed together with all the files listed in manifest.txt.
%%
%% If you receive only some of these files from someone, complain!
%%
%% Permission is granted to copy this file to another file with a clearly
%% different name and to customize the declarations in that copy to serve
%% the needs of your installation, provided that you comply with
%% the conditions in the file legal.txt.
%%
%% However, NO PERMISSION is granted to generate or to distribute a
%% modified version of this file under its original name.
%%
%% You are NOT ALLOWED to change this file.
%%
%%
%% MODIFICATION ADVICE:
%%
%% If you want to customize this file, it is best to make a copy of the
%% source file(s) from which it was produced. Use a different name for
%% your copy(ies) and modify the copy(ies); this will ensure that your
%% modifications do not get overwritten when you install a new release of
%% the standard system. You should also ensure that your modified source
%% file does not generate any modified file with the same name as a
%% standard file. You can then easily distribute your modifications by
%% distributing the modified and renamed copy of the source file, taking
%% care to observe the conditions in legal.txt; this will ensure that
%% other users can safely use your modifications.
%%
%% You will also need to produce your own, suitably named, .ins file to
%% control the generation of files from your source file; this file
%% should contain your own preambles for the files it generates, not
%% those in the standard .ins files.
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%% The names of the source files used are shown above.
%%
%%
%%
%%
%% File `ifthen.dtx'.
%% Copyright (C) 1991 by Leslie Lamport
%% Copyright (C) 1994-1995 LaTeX3 project, David Carlisle
%%                       all rights reserved.
%%
\NeedsTeXFormat{LaTeX2e}[1994/12/01]
\ProvidesPackage{ifthen}
          [1995/04/25 v1.0k Standard LaTeX ifthen package (DPC)]
\def\TE@throw{\@ne=\@ne\noexpand\fi}
\def\boolean#1#2{%
  \TE@throw\expandafter\noexpand\csname if#1\endcsname#2}
\def\TE@length#1#2{\TE@throw\noexpand\ifdim#1#2}
\def\TE@odd#1#2{%
  \TE@throw\noexpand\TE@@odd#1\noexpand\@nil\noexpand\ifodd\count@#2}
\def\TE@@odd#1#2\@nil{%
  \@defaultunits
  \count@\if-#1-0\else0\expandafter#1\fi#2\relax\@nnil}
\def\TE@repl#1#2{%
  \long\def\@tempc##1#1##2{%
    \def\@tempa{##2}\def\@tempb{\@tempc}%
    \ifx\@tempa\@tempb
     \toks@\expandafter{\the\toks@##1}%
     \expandafter\@gobble
    \else
      \toks@\expandafter{\the\toks@##1#2}%
    \expandafter\@tempc
    \fi
    ##2}%
  \expandafter\toks@\expandafter{\expandafter}%
  \expandafter\@tempc\the\toks@#1\@tempc}
\long\def\ifthenelse#1{%
\toks@{#1}%
\TE@repl\or\TE@or
\TE@repl\and\TE@and
\TE@repl\not\TE@neg
    \bgroup
        \let\protect\@unexpandable@protect
        \def\@setref##1##2##3{%
         \ifx##1\relax\z@\else\expandafter##2##1\fi}%
        \def\value##1{\the\csname c@##1\endcsname}%
        \let\equal\TE@equal \let\(\TE@lparen \let\)\TE@rparen
        \let\isodd\TE@odd \let\lengthtest\TE@length
        {\let\@tempa\relax\let\@tempb\relax
        \xdef\@gtempa{\expandafter\TE@eval\the\toks@\TE@endeval}}%
        \@gtempa
        \expandafter\egroup\ifTE@val
          \expandafter\@firstoftwo
        \else
          \expandafter\@secondoftwo
        \fi}
\def\TE@eval{\noexpand\TE@negatefalse\noexpand\iftrue\noexpand\ifnum}
\newif\ifTE@val
\newif\ifTE@negate
\def\TE@endeval{\relax
      \noexpand\TE@setvaltrue\noexpand
    \else
      \noexpand\TE@setvalfalse\noexpand
    \fi
    \noexpand\TE@negatefalse\noexpand
  \fi}
\def\TE@setvaltrue{%
  \ifTE@negate\TE@valfalse\else\TE@valtrue\fi}
\def\TE@setvalfalse{\let\ifTE@val\ifTE@negate}
\def\TE@or{\TE@endeval\noexpand\ifTE@val\noexpand\else\noexpand\ifnum}
\def\TE@and{\TE@endeval\noexpand\ifTE@val\noexpand\ifnum}
\def\TE@neg{\TE@throw\noexpand\TE@negswitch\noexpand\ifnum}
\def\TE@negswitch{\ifTE@negate\TE@negatefalse\else\TE@negatetrue\fi}
\def\TE@lparen#1{\TE@throw\begingroup\TE@eval#1}
\def\TE@rparen#1{%
  \TE@endeval
  \noexpand\expandafter\endgroup\noexpand\ifTE@val#1}
\long\def\TE@equal#1#2#3{\TE@throw
      \def\@tempa{#1}\def\@tempb{#2}%
      \noexpand\ifx\@tempa\@tempb#3}
\def\setboolean#1#2{%
  \lowercase{\def\@tempa{#2}}%
  \@ifundefined{@tempswa\@tempa}%
    {\PackageError{ifthen}%
       {You can only set a boolean to `true' or `false'}\@ehc}%
    {\@ifundefined{#1\@tempa}%
      {\PackageError{ifthen}{Boolean #1 undefined}\@ehc}%
      {\csname#1\@tempa\endcsname}}}
\def\newboolean#1{%
  \csname newif\expandafter\endcsname\csname if#1\endcsname}
\long\def\whiledo#1#2{%
  \ifthenelse{#1}{\@whiledotrue \@whilesw\if@whiledo\fi
     {#2\ifthenelse{#1}{\@whiledotrue}{\@whiledofalse}}}{}}
\newif\if@whiledo
\endinput
%%
%% End of file `ifthen.sty'.