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%% LaTeX2e file `changepage.sty'
%% generated by the `filecontents' environment
%% from source `changepage' on 2009/10/20.
%%
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{changepage}[2009/10/20 v1.0c check page and change page layout]
% Don't use this with memoir
\newcommand*{\cp@whoopsusingmemoir}{}
\@ifclassloaded{memoir}{\def\cp@whoopsusingmemoir{\endinput}}
\cp@whoopsusingmemoir
% New \verb|\if| for the strict option
\newif\ifstrictpagecheck
\strictpagecheckfalse
% User commands for switching strict page checking on/off
\newcommand*{\strictpagecheck}{\strictpagechecktrue}
\newcommand*{\easypagecheck}{\strictpagecheckfalse}
% Declare and process options
\DeclareOption{strict}{\strictpagechecktrue}
\ProcessOptions\relax
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% New commands for strict checking of odd/even page.
%% Works by writing a label and then checking its pageref.
\newif\ifoddpage
\newcounter{cp@cntr}
\newcount\cp@tempcnt % instead of \verb|\@memcnta|
\newcommand{\cplabel}{^_}
\gdef\thepmemc@@page{\the\c@page}
\long\def\pmemprotected@write#1#2#3{% modified \verb|\protected@write|
\begingroup
\let\thepmemc@@page\relax
#2%
\let\protect\@unexpandable@protect
\edef\reserved@a{\write#1{#3}}%
\reserved@a
\endgroup
\if@nobreak\ifvmode\nobreak\fi\fi}
\newcommand*{\pmemlabel}[1]{\@bsphack
\pmemprotected@write\@auxout{}%
{\string\newpmemlabel{#1}{\thepmemc@@page}}%
\@esphack}
\newcommand*{\newpmemlabel}[2]{{\global\@namedef{m@#1}{#2}}}
\newcommand*{\pmemlabelref}[1]{%
\expandafter\ifx\csname m@#1\endcsname\relax
0% % 0 if there is no label yet in the aux file
\else
\csname m@#1\endcsname
\fi}
\DeclareRobustCommand{\checkoddpage}{%
\oddpagefalse%
\ifstrictpagecheck%
\stepcounter{cp@cntr}\pmemlabel{\cplabel\thecp@cntr}%
\cp@tempcnt=\pmemlabelref{\cplabel\thecp@cntr}\relax
\ifodd\cp@tempcnt\oddpagetrue\fi
\else
\ifodd\c@page\oddpagetrue\fi
\fi}
% End newcommands for strict checking of odd/even page.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Copy of some of the code from the ifmtarg package to save requiring ifmtarg
\begingroup
\catcode`\Q=3
\long\gdef\@ifmtarg#1{\@xifmtarg#1QQ\@secondoftwo\@firstoftwo\@nil}
\long\gdef\@xifmtarg#1#2Q#3#4#5\@nil{#4}
\endgroup
% Set the page output parameters
\DeclareRobustCommand{\ch@ngetext}{%
\setlength{\@colht}{\textheight}\setlength{\@colroom}{\textheight}%
\setlength{\vsize}{\textheight}\setlength{\columnwidth}{\textwidth}%
\if@twocolumn%
\advance\columnwidth-\columnsep \divide\columnwidth\tw@%
\@firstcolumntrue%
\fi%
\setlength{\hsize}{\columnwidth}%
\setlength{\linewidth}{\hsize}}
\DeclareRobustCommand{\changetext}[5]{%
\@ifmtarg{#1}{}{\addtolength{\textheight}{#1}}%
\@ifmtarg{#2}{}{\addtolength{\textwidth}{#2}}%
\@ifmtarg{#3}{}{\addtolength{\evensidemargin}{#3}}%
\@ifmtarg{#4}{}{\addtolength{\oddsidemargin}{#4}}%
\@ifmtarg{#5}{}{\addtolength{\columnsep}{#5}}%
\ch@ngetext}
\DeclareRobustCommand{\changepage}[9]{%
\@ifmtarg{#1}{}{\addtolength{\textheight}{#1}}%
\@ifmtarg{#2}{}{\addtolength{\textwidth}{#2}}%
\@ifmtarg{#3}{}{\addtolength{\evensidemargin}{#3}}%
\@ifmtarg{#4}{}{\addtolength{\oddsidemargin}{#4}}%
\@ifmtarg{#5}{}{\addtolength{\columnsep}{#5}}%
\ch@ngetext%
\@ifmtarg{#6}{}{\addtolength{\topmargin}{#6}}%
\@ifmtarg{#7}{}{\addtolength{\headheight}{#7}}%
\@ifmtarg{#8}{}{\addtolength{\headsep}{#8}}%
\@ifmtarg{#9}{}{\addtolength{\footskip}{#9}}}
\newenvironment{adjustwidth}[2]{%
\begin{list}{}{%
\topsep\z@%
\listparindent\parindent%
\parsep\parskip%
\@ifmtarg{#1}{\setlength{\leftmargin}{\z@}}%
{\setlength{\leftmargin}{#1}}%
\@ifmtarg{#2}{\setlength{\rightmargin}{\z@}}%
{\setlength{\rightmargin}{#2}}%
}
\item[]}{\end{list}}
\newenvironment{adjustwidth*}[2]{%
\begin{list}{}{%
\topsep\z@%
\listparindent\parindent%
\parsep\parskip%
\checkoddpage
\ifoddpage% odd numbered page
\@ifmtarg{#1}{\setlength{\leftmargin}{\z@}}%
{\setlength{\leftmargin}{#1}}%
\@ifmtarg{#2}{\setlength{\rightmargin}{\z@}}%
{\setlength{\rightmargin}{#2}}%
\else% even numbered page
\@ifmtarg{#2}{\setlength{\leftmargin}{\z@}}%
{\setlength{\leftmargin}{#2}}%
\@ifmtarg{#1}{\setlength{\rightmargin}{\z@}}%
{\setlength{\rightmargin}{#1}}%
\fi}
\item[]}{\end{list}}
\endinput
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