--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/chngcntr.sty	Mon Jan 14 06:44:49 2008 +0100
@@ -0,0 +1,107 @@
+% chngcntr.sty
+%
+% Provides commands to change the resetting of counters.
+% Instructions for use are at the end of this file.
+%
+% author: Peter Wilson (CUA)
+%         (now at peter.r.wilson@boeing.com)
+% Released under the Latex Project Public License
+%
+%
+\NeedsTeXFormat{LaTeX2e}
+\ProvidesPackage{chngcntr}[2001/03/30 v1.0 change counter resetting]
+%
+% This package uses David Carlisle's \@removefromreset command as
+% specified in the remreset package available from CTAN as
+% macros/latex/contrib/supported/carlisle/remreset.sty
+% It is \provided here as a convenience to the user, and with
+% David Carlisle's permission.
+% START OF DAVID CARLISLE'S CODE
+\providecommand{\@removefromreset}[2]{{%
+  \expandafter\let\csname c@#1\endcsname\@removefromreset
+  \def\@elt##1{%
+    \expandafter\ifx\csname c@##1\endcsname\@removefromreset
+    \else
+      \noexpand\@elt{##1}%
+    \fi}%
+  \expandafter\xdef\csname cl@#2\endcsname{%
+    \csname cl@#2\endcsname}}}
+% END OF DAVID CARLISLE'S CODE
+
+%%\@ifbothc@t@s{<package>}{<counter>}{<within>}{<code when both are counters>}
+\newcommand{\@ifbothc@t@s}[4]{%
+  \@ifundefined{c@#2}{% counter undefined
+    \PackageError{#1}{#2 is not a counter}{\@eha}}%
+  {% else counter is defined
+    \@ifundefined{c@#3}{% within undefined
+      \PackageError{#1}{#3 is not a counter}{\@eha}}%
+    {% else both counter and within  are defined
+     #4}}}
+
+%%\counterwithout*{<counter>}{<within>}
+\newcommand{\counterwithout}{\@ifstar{\c@t@soutstar}{\c@t@sout}}
+\newcommand{\c@t@soutstar}[2]{%
+  \@ifbothc@t@s{chngcntr}{#1}{#2}{\@removefromreset{#1}{#2}}}
+\newcommand{\c@t@sout}[2]{%
+  \@ifbothc@t@s{chngcntr}{#1}{#2}{\@removefromreset{#1}{#2}%
+                        \@namedef{the#1}{\arabic{#1}}}}
+
+
+%%\counterwithin*{<counter>}{<within>}
+\newcommand{\counterwithin}{\@ifstar{\c@t@sinstar}{\c@t@sin}}
+\newcommand{\c@t@sinstar}[2]{%
+  \@ifbothc@t@s{chngcntr}{#1}{#2}{\@addtoreset{#1}{#2}}}
+\newcommand{\c@t@sin}[2]{%
+  \@ifbothc@t@s{chngcntr}{#1}{#2}{\@addtoreset{#1}{#2}%
+                        \@namedef{the#1}{\@nameuse{the#2}.\arabic{#1}}}}
+
+
+\endinput
+
+%%%%%%%%%%%%%%%%%%
+% USAGE
+%%%%%%%%%%%%%%%%%%
+%
+%     In LaTeX, a new counter called, say `ctr', is created by the command
+% \newcounter{ctr}[within]. If the optional within argument is given
+% the the counter `ctr' is reset to zero each time the counter `within'
+% changes. The command \thectr typesets the value of the counter ctr.
+% This is automatically defined by \newcounter and is initialised
+% to typeset arabic numerals.	
+%
+%%%%%%%%%%%%%%%%%
+% \counterwithin
+% \counterwithin*
+%%%%%%%%%%%%%%%%%
+%    It is sometimes desireable to change a counter that has been defined
+% by \newcounter{ctr} to act as though it had been defined as 
+% \newcounter{ctr}[within]. The package provides the command
+% \counterwithin{ctr}{within} that accomplishes this. By default,
+% it also redefines the \thectr command so that it typesets values
+% in the style \thewithin.\arabic{ctr}. The starred version of the
+% command suppresses the redefinition of \thectr 
+% (e.g., \counterwithin*{ctr}{within}).
+%
+%%%%%%%%%%%%%%%%%%
+% \counterwithout
+% \counterwithout*
+%%%%%%%%%%%%%%%%%%
+%    Likewise, the command \counterwithout{ctr}{within} changes a
+% counter that has been created by \newcounter{ctr}[within] to act
+% as though it had been created by \newcounter{ctr}. By default it
+% also redefines the \thectr command so that it just typesets an arabic
+% numeral. The starred version of the command suppresses the redefinition
+% of \thectr.
+%
+%    Any number of \counterwithin{ctr}{...} and \counterwithout{ctr}{...}
+% commands can be issued for a given counter, ctr, if you wish to toggle
+% between the two styles. The current value of ctr is unaffected by
+% \counterwithin and \counterwithout. If you want to change the value
+% after one of these commands, use \setcounter{ctr}{...}, and to change
+% the typeseting style use \renewcommand{\thectr}{...}.
+%
+%
+% Peter W.
+% 2001/03/30
+%
+