fifo-stack (25mar14)

git-svn-id: svn://tug.org/texlive/trunk@33288 c570f23f-e606-0410-a88d-b1316a301751

10 files changed, 1606 insertions, 1 deletions

diff --git a/Master/texmf-dist/doc/latex/fifo-stack/README b/Master/texmf-dist/doc/latex/fifo-stack/README
new file mode 100644
index 00000000000..66f085fc107
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/fifo-stack/README
@@ -0,0 +1,77 @@
+# latexFifoStack
+
+A LaTeX implementation of a combined FIFO Stack modified from Benjamin 
+Bayart's excellent [LaTeX stack 
+package](http://www.ctan.org/tex-archive/macros/latex2e/contrib/stack) 
+from [CTAN](http://www.ctan.org).
+
+As well as keeping Bayart's \Push and \Pop commands (which have been 
+renamed to \FSPush and \FSPop and which work on the top/end of the 
+FIFO/Stack), we explicitly add the ability to \FSUnshift \FSShift off 
+the bottom/front of the FIFO/Stack
+
+# Source code
+
+The original source code [public 
+releases](https://github.com/diSimplex/latexFifoStack) and the 
+[development code](https://github.com/stephengaito/latexFifoStack) can 
+both be found on GitHub.
+
+# Building
+
+This project can most easily be built using the "cook" rubygem and the 
+command line command:
+
+> cook texStyle
+
+in the project's root directory.  This will compile the documentation, 
+run the regression tests and zip the CTAN package into the directory 
+ctanRepo directory.
+
+# Copyright and LaTeX Project Public License
+
+Copyright (C) 2014 Stephen Gaito (PerceptiSys Ltd)
+
+This work may be distributed and/or modified under the conditions of 
+the LaTeX Project Public License, either version 1.3 of this license or 
+(at your option) any later version.
+
+The latest version of this license is in 
+http://www.latex-project.org/lppl.txt and version 1.3 or later is part 
+of all distributions of LaTeX version 2005/12/01 or later.
+
+This work has the LPPL maintenance status `maintained'.
+
+The Current Maintainer of this work is Stephen Gaito.
+
+The released source can be found at:
+https://github.com/diSimplex/latexFifoStack/tree/master/texStyle
+
+The development source can be found at:
+https://github.com/stephengaito/latexFifoStack/tree/master/texStyle
+
+This work consists of the files fifo-stack.dtx, and fifo-stack.ins. 
+
+The command:
+
+> pdflatex fifo-stack.ins
+
+followed by:
+
+> pdflatex fifo-stack.dtx
+
+will produce the derived files: fifo-stack.sty, fifo-stack-test.tex,
+and fifo-stack.pdf.
+
+The command:
+
+> pdflatex fifo-stack-test.tex
+
+will regression test the fifo-stack package. Output will be found in
+fifo-stack-test.lgout. If pdflatex completes with no errors, then all
+regression tests passed.
+
+# What's new
+
+v1.0 (2014/03/24)
+* Initial version extened from CTAN stack package v1.00 (on 2014/03/24)
diff --git a/Master/texmf-dist/doc/latex/fifo-stack/fifo-stack-test.tex b/Master/texmf-dist/doc/latex/fifo-stack/fifo-stack-test.tex
new file mode 100644
index 00000000000..c8179eecd8a
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/fifo-stack/fifo-stack-test.tex
@@ -0,0 +1,267 @@
+%%
+%% This is file `fifo-stack-test.tex',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% fifo-stack.dtx  (with options: `qstest')
+%% 
+%% Copyright (C) 2014 Stephen Gaito (PerceptiSys Ltd)
+%% 
+%% This work may be distributed and/or modified under the conditions of the LaTeX
+%% Project Public License, either version  1.3  of  this license or (at your
+%% option) any later version.
+%% 
+%% The latest version of this license is in http://www.latex-project.org/lppl.txt
+%% and  version 1.3 or later is part of all distributions of LaTeX version
+%% 2005/12/01 or later.
+%% 
+%% This work has the LPPL maintenance status `maintained'.
+%% 
+%% The Current Maintainer of this work is Stephen Gaito.
+%% 
+%% The released source can be found at:
+%% https://github.com/diSimplex/latexFifoStack/tree/master/texStyle
+%% 
+%% The development source can be found at:
+%% https://github.com/stephengaito/latexFifoStack/tree/master/texStyle
+%% 
+%% This work consists of the files fifo-stack.dtx, and fifo-stack.ins.
+%% 
+%% The command:
+%%   pdflatex fifo-stack.ins
+%% followed by:
+%%   pdflatex fifo-stack.dtx
+%% will produce the derived files: fifo-stack.sty, fifo-stack-test.tex,
+%% and fifo-stack.pdf.
+%% 
+%% The command:
+%%   pdflatex fifo-stack-test.tex
+%% will regression test the fifo-stack package. Output will be found in
+%% fifo-stack-test.lgout. If pdflatex completes with no errors, then all
+%% regression tests passed.
+%% 
+\RequirePackage{qstest}
+\RequirePackage{xifthen}
+\IncludeTests{*}
+\LogTests{lgout}{*}{*}
+\RequirePackage{fifo-stack}
+\begin{qstest}{Simple stack integration test}
+  {\FSCreate, \FSPush, \FSPop, \FSTop}
+
+  \FSCreate{testStack}{defaultValue}
+  \Expect*{\FSTop{testStack}}{defaultValue}
+  \FSPush{testStack}{firstValue}
+  \Expect*{\FSTop{testStack}}{firstValue}
+  \FSPush{testStack}{secondValue}
+  \Expect*{\FSTop{testStack}}{secondValue}
+  \FSPush{testStack}{thirdValue}
+  \Expect*{\FSTop{testStack}}{thirdValue}
+  \FSPop{testStack}
+  \Expect*{\FSTop{testStack}}{secondValue}
+  \FSPop{testStack}
+  \Expect*{\FSTop{testStack}}{firstValue}
+  \FSPop{testStack}
+  \Expect*{\FSTop{testStack}}{defaultValue}
+  \FSPop{testStack}
+  \Expect*{\FSTop{testStack}}{defaultValue}
+\end{qstest}
+\begin{qstest}{Up down up down stack integration test}
+  {\FSCreate, \FSPush, \FSPop, \FSTop}
+
+  \FSCreate{testStackUDUD}{defaultValue}
+  \Expect*{\FSTop{testStackUDUD}}{defaultValue}
+  \FSPush{testStackUDUD}{firstValue}
+  \Expect*{\FSTop{testStackUDUD}}{firstValue}
+  \FSPush{testStackUDUD}{secondValue}
+  \Expect*{\FSTop{testStackUDUD}}{secondValue}
+  \FSPop{testStackUDUD}
+  \Expect*{\FSTop{testStackUDUD}}{firstValue}
+  \FSPush{testStackUDUD}{newSecondValue}
+  \Expect*{\FSTop{testStackUDUD}}{newSecondValue}
+\end{qstest}
+\begin{qstest}{Simple FIFO integration test}
+  {\FSCreate, \FSPush, \FSShift, \FSTop, \FSBottom}
+
+  \FSCreate{testFifo}{defaultValue}
+  \Expect*{\FSTop{testFifo}}{defaultValue}
+  \Expect*{\FSBottom{testFifo}}{defaultValue}
+  \FSPush{testFifo}{firstValue}
+  \Expect*{\FSTop{testFifo}}{firstValue}
+  \Expect*{\FSBottom{testFifo}}{firstValue}
+  \FSPush{testFifo}{secondValue}
+  \Expect*{\FSTop{testFifo}}{secondValue}
+  \Expect*{\FSBottom{testFifo}}{firstValue}
+  \FSShift{testFifo}
+  \Expect*{\FSTop{testFifo}}{secondValue}
+  \Expect*{\FSBottom{testFifo}}{secondValue}
+  \FSPush{testFifo}{thirdValue}
+  \Expect*{\FSTop{testFifo}}{thirdValue}
+  \Expect*{\FSBottom{testFifo}}{secondValue}
+  \FSShift{testFifo}
+  \Expect*{\FSTop{testFifo}}{thirdValue}
+  \Expect*{\FSBottom{testFifo}}{thirdValue}
+  \FSShift{testFifo}
+  \Expect*{\FSTop{testFifo}}{defaultValue}
+  \Expect*{\FSBottom{testFifo}}{defaultValue}
+  \FSShift{testFifo}
+  \Expect*{\FSTop{testFifo}}{defaultValue}
+  \Expect*{\FSBottom{testFifo}}{defaultValue}
+\end{qstest}
+\begin{qstest}{Simple linear use of unshift/shift}
+  {\FSUnshift, \FSShift}
+
+  \FSCreate{testRStack}{defaultValue}
+  \Expect*{\FSBottom{testRStack}}{defaultValue}
+  \FSUnshift{testRStack}{firstValue}
+  \Expect*{\FSBottom{testRStack}}{firstValue}
+  \FSUnshift{testRStack}{secondValue}
+  \Expect*{\FSBottom{testRStack}}{secondValue}
+  \FSUnshift{testRStack}{thirdValue}
+  \Expect*{\FSBottom{testRStack}}{thirdValue}
+  \FSShift{testRStack}
+  \Expect*{\FSBottom{testRStack}}{secondValue}
+  \FSShift{testRStack}
+  \Expect*{\FSBottom{testRStack}}{firstValue}
+  \FSShift{testRStack}
+  \Expect*{\FSBottom{testRStack}}{defaultValue}
+  \FSShift{testRStack}
+  \Expect*{\FSBottom{testRStack}}{defaultValue}
+\end{qstest}
+\begin{qstest}{Full non-linear FIFO/stack integration test}
+  {\FSCreate, \FSPush, \FSPop, \FSUnshift, \FSShift, \FSTop, \FSBottom}
+
+  \FSCreate{testFS}{defaultValue}
+  \Expect*{\FSTop{testFS}}{defaultValue}
+  \Expect*{\FSBottom{testFS}}{defaultValue}
+  \FSPush{testFS}{value1}
+  \Expect*{\FSTop{testFS}}{value1}
+  \Expect*{\FSBottom{testFS}}{value1}
+  \FSUnshift{testFS}{value-1}
+  \Expect*{\FSTop{testFS}}{value1}
+  \Expect*{\FSBottom{testFS}}{value-1}
+  \FSShift{testFS}
+  \Expect*{\FSTop{testFS}}{value1}
+  \Expect*{\FSBottom{testFS}}{value1}
+  \FSPush{testFS}{value2}
+  \Expect*{\FSTop{testFS}}{value2}
+  \Expect*{\FSBottom{testFS}}{value1}
+  \FSUnshift{testFS}{value-1again}
+  \Expect*{\FSTop{testFS}}{value2}
+  \Expect*{\FSBottom{testFS}}{value-1again}
+  \FSUnshift{testFS}{value-2}
+  \Expect*{\FSTop{testFS}}{value2}
+  \Expect*{\FSBottom{testFS}}{value-2}
+  \FSPop{testFS}
+  \Expect*{\FSTop{testFS}}{value1}
+  \Expect*{\FSBottom{testFS}}{value-2}
+  \FSPop{testFS}
+  \Expect*{\FSTop{testFS}}{value-1again}
+  \Expect*{\FSBottom{testFS}}{value-2}
+  \FSShift{testFS}
+  \Expect*{\FSTop{testFS}}{value-1again}
+  \Expect*{\FSBottom{testFS}}{value-1again}
+  \FSPop{testFS}
+  \Expect*{\FSTop{testFS}}{defaultValue}
+  \Expect*{\FSBottom{testFS}}{defaultValue}
+  \FSPop{testFS}
+  \Expect*{\FSTop{testFS}}{defaultValue}
+  \Expect*{\FSBottom{testFS}}{defaultValue}
+  \FSShift{testFS}
+  \Expect*{\FSTop{testFS}}{defaultValue}
+  \Expect*{\FSBottom{testFS}}{defaultValue}
+\end{qstest}
+\begin{qstest}{FSClear, FSSize, and FSDestroy test}
+  {\FSCreate, \FSPush, \FSPop, \FSUnshift, \FSShift, \FSTop,
+   \FSBottom, \FSClear, \FSDestroy, \FSSize}
+
+  \FSCreate{testFSC}{defaultValue}
+  \Expect*{\FSSize{testFSC}}{0}
+  \Expect*{\FSTop{testFSC}}{defaultValue}
+  \Expect*{\FSBottom{testFSC}}{defaultValue}
+  \FSPush{testFSC}{value1}
+  \Expect*{\FSSize{testFSC}}{1}
+  \Expect*{\FSTop{testFSC}}{value1}
+  \Expect*{\FSBottom{testFSC}}{value1}
+  \FSUnshift{testFSC}{value-1}
+  \Expect*{\FSSize{testFSC}}{2}
+  \Expect*{\FSTop{testFSC}}{value1}
+  \Expect*{\FSBottom{testFSC}}{value-1}
+  \FSPush{testFSC}{value2}
+  \Expect*{\FSSize{testFSC}}{3}
+  \Expect*{\FSTop{testFSC}}{value2}
+  \Expect*{\FSBottom{testFSC}}{value-1}
+  \FSUnshift{testFSC}{value-2}
+  \Expect*{\FSSize{testFSC}}{4}
+  \Expect*{\FSTop{testFSC}}{value2}
+  \Expect*{\FSBottom{testFSC}}{value-2}
+  \FSClear{testFSC}
+  \Expect*{\FSSize{testFSC}}{0}
+  \Expect*{\FSTop{testFSC}}{defaultValue}
+  \Expect*{\FSBottom{testFSC}}{defaultValue}
+  \FSPush{testFSC}{value1}
+  \Expect*{\FSSize{testFSC}}{1}
+  \Expect*{\FSTop{testFSC}}{value1}
+  \Expect*{\FSBottom{testFSC}}{value1}
+  \FSUnshift{testFSC}{value-1}
+  \Expect*{\FSSize{testFSC}}{2}
+  \Expect*{\FSTop{testFSC}}{value1}
+  \Expect*{\FSBottom{testFSC}}{value-1}
+  \FSPush{testFSC}{value2}
+  \Expect*{\FSSize{testFSC}}{3}
+  \Expect*{\FSTop{testFSC}}{value2}
+  \Expect*{\FSBottom{testFSC}}{value-1}
+  \FSUnshift{testFSC}{value-2}
+  \Expect*{\FSSize{testFSC}}{4}
+  \Expect*{\FSTop{testFSC}}{value2}
+  \Expect*{\FSBottom{testFSC}}{value-2}
+  \FSDestroy{testFSC}
+\end{qstest}
+\begin{qstest}{Unit test of \fifo@stack@pointer}{\fifo@stack@pointer}
+  \makeatletter
+  \Expect*{\fifo@stack@pointer{1}}{ii}
+  \Expect*{\fifo@stack@pointer{0}}{i}
+  \Expect*{\fifo@stack@pointer{-1}}{@i}
+  \makeatother
+\end{qstest}
+\begin{qstest}{Unit test of \FSdestroy}
+  {\FSCreate, \FSDestroy}
+
+  \FSCreate{testFSDestroy}{defaultValue}
+  \makeatletter
+  \ExpectIfThen{\isnamedefined{testFSDestroy@fifo@stack@count@top}}
+  \ExpectIfThen{\isnamedefined{testFSDestroy@fifo@stack@count@bottom}}
+  \ExpectIfThen{\isnamedefined{testFSDestroy@fifo@stack@count@size}}
+  \ExpectIfThen{\isnamedefined{fifo@stack@top@testFSDestroy}}
+  \ExpectIfThen{\isnamedefined{fifo@stack@bottom@testFSDestroy}}
+  \makeatother
+  \FSDestroy{testFSDestroy}
+  \makeatletter
+  \ExpectIfThen{\isundefined\testFSDestroy@fifo@stack@count@top}
+  \ExpectIfThen{\isundefined\testFSDestroy@fifo@stack@count@bottom}
+  \ExpectIfThen{\isundefined\testFSDestroy@fifo@stack@count@size}
+  \ExpectIfThen{\isundefined\fifo@stack@top@testFSDestroy}
+  \ExpectIfThen{\isundefined\fifo@stack@bottom@testFSDestroy}
+  \makeatother
+\end{qstest}
+\begin{qstest}{Unit test of \FSPush and \FSTop}
+  {\FSCreate, \FSPush, \FSTop}
+
+  \FSCreate{testFSPush}{defaultValue}
+  \Expect*{\FSTop{testFSPush}}{defaultValue}
+  \FSPush{testFSPush}{\FSTop{testFSPush}-with-additional-text}
+  \Expect*{\FSTop{testFSPush}}{defaultValue-with-additional-text}
+\end{qstest}
+\begin{qstest}{Unit test of \FSUnshift and \FSBottom}
+  {\FSCreate, \FSUnshift, \FSBottom}
+
+  \FSCreate{testFSUnshift}{defaultValue}
+  \Expect*{\FSBottom{testFSUnshift}}{defaultValue}
+  \FSUnshift{testFSUnshift}{\FSBottom{testFSUnshift}-with-additional-text}
+  \Expect*{\FSBottom{testFSUnshift}}{defaultValue-with-additional-text}
+\end{qstest}
+\LogClose{lgout}
+\stop
+\endinput
+%%
+%% End of file `fifo-stack-test.tex'.
diff --git a/Master/texmf-dist/doc/latex/fifo-stack/fifo-stack.cwl b/Master/texmf-dist/doc/latex/fifo-stack/fifo-stack.cwl
new file mode 100644
index 00000000000..524cdc5c806
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/fifo-stack/fifo-stack.cwl
@@ -0,0 +1,48 @@
+# 
+# Copyright (C) 2014 Stephen Gaito (PerceptiSys Ltd)
+# 
+# This work may be distributed and/or modified under the conditions of the
+# LaTeX Project Public License, either version  1.3  of  this license or (at
+# your option) any later version.
+# 
+# The latest version of this license is in
+# http://www.latex-project.org/lppl.txt and  version 1.3 or later is part of
+# all distributions of LaTeX version 2005/12/01 or later.
+# 
+# This work has the LPPL maintenance status `maintained'.
+# 
+# The Current Maintainer of this work is Stephen Gaito.
+# 
+# The released source can be found at:
+# https://github.com/diSimplex/latexFifoStack/tree/master/texStyle
+# 
+# The development source can be found at:
+# https://github.com/stephengaito/latexFifoStack/tree/master/texStyle
+# 
+# This work consists of the files fifo-stack.dtx, and fifo-stack.ins. 
+# 
+# The command:
+#   pdflatex fifo-stack.ins
+# followed by:
+#   pdflatex fifo-stack.dtx
+# will produce the derived files: fifo-stack.sty, fifo-stack-test.tex, 
+# and fifo-stack.pdf.
+# 
+# The command:
+#   pdflatex fifo-stack-test.tex
+# will regression test the fifo-stack package. Output will be found in
+# fifo-stack-test.lgout. If pdflatex completes with no errors, then all
+# regression tests passed.
+# 
+\FSCreate{fifoStackName}{defaultValue}#
+\FSClear{fifoStackName}#
+\FSDestroy{fifoStackName}#
+\FSTop{fifoStackName}#
+\FSPush{fifoStackName}{value}#
+\FSPop{fifoStackName}#
+\FSShowTop{fifoStackName}#
+\FSBottom{fifoStackName}#
+\FSUnshift{fifoStackName}{value}#
+\FSShift{fifoStackName}#
+\FSShowBottom{fifoStackName}#
+\FSSize{fifoStackName}#
diff --git a/Master/texmf-dist/doc/latex/fifo-stack/fifo-stack.pdf b/Master/texmf-dist/doc/latex/fifo-stack/fifo-stack.pdf
new file mode 100644
index 00000000000..f78a764d75b
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/fifo-stack/fifo-stack.pdf
diff --git a/Master/texmf-dist/source/latex/fifo-stack/fifo-stack.dtx b/Master/texmf-dist/source/latex/fifo-stack/fifo-stack.dtx
new file mode 100644
index 00000000000..e4d35660e00
--- /dev/null
+++ b/Master/texmf-dist/source/latex/fifo-stack/fifo-stack.dtx
@@ -0,0 +1,957 @@
+% \changes{1.0}{2014/03/24}{Initial version}
+%
+% \iffalse
+%<*never>
+\documentclass{ltxdoc}
+\usepackage{fifo-stack}
+\usepackage{hyperref}
+\GetFileInfo{fifo-stack.sty}
+\CodelineIndex
+\EnableCrossrefs
+\RecordChanges
+\begin{document}
+\CheckSum{12}
+\DocInput{fifo-stack.dtx}
+\section{Copyright and \LaTeX\ Project Public License}
+\begin{verbatim}
+%txsBeginComment
+
+Copyright (C) 2014 Stephen Gaito (PerceptiSys Ltd)
+
+This work may be distributed and/or modified under the conditions of the
+LaTeX Project Public License, either version  1.3  of  this license or (at
+your option) any later version.
+
+The latest version of this license is in
+http://www.latex-project.org/lppl.txt and  version 1.3 or later is part of
+all distributions of LaTeX version 2005/12/01 or later.
+
+This work has the LPPL maintenance status `maintained'.
+
+The Current Maintainer of this work is Stephen Gaito.
+
+The released source can be found at:
+https://github.com/diSimplex/latexFifoStack/tree/master/texStyle
+
+The development source can be found at:
+https://github.com/stephengaito/latexFifoStack/tree/master/texStyle
+
+This work consists of the files fifo-stack.dtx, and fifo-stack.ins. 
+
+The command:
+  pdflatex fifo-stack.ins
+followed by:
+  pdflatex fifo-stack.dtx
+will produce the derived files: fifo-stack.sty, fifo-stack-test.tex, 
+and fifo-stack.pdf.
+
+The command:
+  pdflatex fifo-stack-test.tex
+will regression test the fifo-stack package. Output will be found in
+fifo-stack-test.lgout. If pdflatex completes with no errors, then all
+regression tests passed.
+
+%txsEndComment
+\end{verbatim}
+\PrintIndex
+\PrintChanges
+\end{document}
+%</never>
+% \fi
+%
+% \DoNotIndex{\edef,\advance,\else,\csname,\endcsname,\expandafter}
+% \DoNotIndex{\ifx,\fi,\input,\ifnum,\relax,\newcount,\romannumeral}
+% \DoNotIndex{\the,\typeout,\xdef,\global,\newcommand,\RequirePackage}
+% \DoNotIndex{\PackageError,\ProvidesPackage,\gdef}
+% \DoNotIndex{\IncludeTests,\LogClose,\LogTests,\Expect,\ExpectIfThen}
+% \DoNotIndex{\isnamedefined,\isundefined}
+% \DoNotIndex{\stop,\makeatletter,\makeatother,\begin,\end,\def,\let}
+% \DoNotIndex{\testFSDestroy@fifo@stack@count@top}
+% \DoNotIndex{\testFSDestroy@fifo@stack@count@bottom}
+% \DoNotIndex{\testFSDestroy@fifo@stack@count@size}
+% \DoNotIndex{\fifo@stack@top@testFSDestroy}
+% \DoNotIndex{\fifo@stack@bottom@testFSDestroy}
+%
+% \title{A \LaTeX\ FIFO/Stack implementation for Package writers}
+% \author{Stephen \textsc{Gaito}}
+% \date{\filedate}
+% \maketitle
+% \begin{abstract}
+% This package provides a \LaTeX\ implementation of a FIFO/Stack system
+% independent from the \TeX\ stack itself. It is based on Benjamin Bayart's
+% excellent \href{http://www.ctan.org/pkg/stack}{stack} package from
+% \href{http://www.ctan.org}{CTAN}.
+%
+% This package by itself is of no use to anyone other than macro-developers.
+%
+% Note that to simplify the computations, this package makes essential use of
+% $\varepsilon$-\TeX's \verb|\numexpr| macro. Fortunately most modern \TeX,
+% \LaTeX\ and pdf\LaTeX's are actually $\varepsilon$-\TeX.
+% \end{abstract}
+% \tableofcontents
+%
+% \section{Using the FIFO/stack package}
+%
+% All of the macros provided by this package are meant to be used by package
+% developers (there is no meaningful use of a FIFO or stack in a final
+% document, they will only to be used in a package), so, all of those macros
+% have capital letters in their names, following old guidelines for \LaTeX3
+% project.
+%
+% To ensure these macros do not clash with other packages, the names of all
+% macros begin with ``FS''.
+%
+% \subsection{FIFO/Stack creation and destruction commands}
+%
+% To create a new FIFO/stack:
+% \begin{quote}
+% \DescribeMacro{\FSCreate}\verb|\FSCreate{fifoStackName}{defaultValue}|
+% \end{quote}
+% This macro simply initializes all the required data for the FIFO/stack named by
+% the value of the first argument, \verb|fifoStackName|. The second argument,
+% \verb|defaultValue|, is the value of the top of the FIFO/stack whenever the
+% FIFO/stack is empty.
+%
+% To clear an existing FIFO/stack of all of its current elements:
+% \begin{quote}
+% \DescribeMacro{\FSClear}\verb|\FSClear{fifoStackName}|
+% \end{quote}
+% This macro empties the FIFO/stack named \verb|fifoStackName|, but the
+% FIFO/stack can still be used to \verb|\FSPush| or \verb|\FSUnshift| new
+% elements.
+%
+% To destroy an existing FIFO/stack:
+% \begin{quote}
+% \DescribeMacro{\FSDestroy}\verb|\FSDestroy{fifoStackName}|
+% \end{quote}
+% This macro destroys the FIFO/stack named \verb|fifoStackName|.
+%
+% \subsection{Stack based commands}
+%
+% To push a new value on \emph{top} of a FIFO/stack:
+% \begin{quote}
+% \DescribeMacro{\FSPush}\verb|\FSPush{fifoStackName}{value}|\newline
+% \end{quote}
+% Note that you \emph{can} use \verb|\FSTop| in the \verb|value| argument of the
+% \verb|\FSPush| macro. See the qstest unit test for \verb|\FSPush| (below) for
+% an example.
+%
+% To remove the value from the \emph{top} of a FIFO/stack:
+% \begin{quote}
+% \DescribeMacro{\FSPop}\verb|\FSPop{fifoStackName}|
+% \end{quote}
+%
+% To get the value from the \emph{top} of the FIFO/stack:
+% \begin{quote}
+% \DescribeMacro{\FSTop}\verb|\FSTop{fifoStackName}|
+% \end{quote}
+%
+% For use when debugging your use of the FIFO/stack:
+% \begin{quote}
+% \DescribeMacro{\FSShowTop}\verb|\FSShowTop{fifoStackName}|
+% \end{quote}
+% will \verb|\typeout| the current value on the \emph{top} of the FIFO/stack.
+%
+% \subsection{FIFO based commands}
+%
+% To add a new value to the \emph{bottom} of a FIFO/stack:
+% \begin{quote}
+% \DescribeMacro{\FSUnshift}\verb|\FSUnshift{fifoStackName}{value}|
+% \end{quote}
+% Note that you \emph{can} use \verb|\FSBottom| in the \verb|value| argument of
+% the \verb|\FSUnshift| macro. See the qstest unit test for \verb|\FSUnshift|
+% (below) for an example.
+%
+% To remove the value on the \emph{bottom} of a FIFO/stack:
+% \begin{quote}
+% \DescribeMacro{\FSShift}\verb|\FSShift{fifoStackName}|
+% \end{quote}
+%
+% To get the value on the \emph{bottom} of a FIFO/stack:
+% \begin{quote}
+% \DescribeMacro{\FSBottom}\verb|\FSBottom{fifoStackName}|
+% \end{quote}
+%
+% For use when debugging your use of the FIFO/stack:
+% \begin{quote}
+% \DescribeMacro{\FSShowBottom}\verb|\FSShowBottom{fifoStackName}|
+% \end{quote}
+% will \verb|\typeout| the current value on the \emph{bottom} of the FIFO/stack.
+%
+% \subsection{FIFO/stack size commands}
+%
+% To get the current size of the FIFO/stack:
+% \begin{quote}
+% \DescribeMacro{\FSSize}\verb|\FSSize{fifoStackName}|
+% \end{quote}
+%
+% \subsection{TeXStudio CWL file}
+%
+% As a bonus for users of TeXStudio, the \verb|fifo-stack.zip| file also
+% contains a \verb|fifo-stack.cwl| file which provides TeXStudio command
+% expansion descriptions for each of the `public' \verb|fifo-stack| macros. To
+% make use of these command expansions, simply place the \verb|fifo-stack.cwl|
+% file into TeXStudio's local configuration directory (on most Linux
+% distributions this can be found in \verb|~/.config/texstudio|).
+%
+% This \verb|fifo-stack.cwl| file is automatically generated from the macrocode
+% lines which begin with the characters \verb|%txs|. This automatic generation
+% is done by the \verb|cook texStyle| command defined by the sister project
+% \href{https://github.com/diSimplex/diSimplexLaTeX}{diSimplexLaTeX}'s (ruby)
+% cookbook.
+%
+% \subsection{\TeX\ and \LaTeX\ Dependencies}
+%
+% The \verb|fifo-stack| package depends upon both $\varepsilon$-\TeX, as well as
+% the \verb|ifthen| package. $\varepsilon$-\TeX\ is required only for the two
+% uses of \verb|\numexpr|. The \verb|ifthen| package is only required for the
+% one use of \verb|\whiledo|. All three uses are listed in the index.
+%
+% The production of this documentation assumes you have the \verb|hyperref|
+% package installed.
+%
+% The regression tests associated with this package depend upon the
+% \verb|qstest|, \verb|ifthen|, and \verb|xifthen| packages.
+%
+% \section{Integration tests and example usage}
+%
+% We use the \href{http://www.ctan.org/pkg/qstest}{QSTest} package from
+% \href{http://www.ctan.org}{CTAN} to provide both integration and unit tests of
+% our FIFO/stack package.
+%
+% In this section we walk through a number of integration tests which also
+% provide example uses of FIFO/Stacks. We provide unit tests of specific
+% invariants in the code section below.  These unit tests are associated
+% with the section of code which implements a particular invariant.
+%
+% We begin by setting up the \LaTeX\ QSTest package to test the \verb|fifo-stack|
+% package, and we will log everything. Note that we do not use a document class
+% or begin/end a document, this is because there should not be any \emph{normal}
+% output created.  All \emph{results} are listed in the associated
+% \verb|fifo-stack-test.lgout| file.
+%
+%    \begin{macrocode}
+%<*qstest>
+\RequirePackage{qstest}
+\RequirePackage{xifthen}
+\IncludeTests{*}
+\LogTests{lgout}{*}{*}
+\RequirePackage{fifo-stack}
+%</qstest>
+%    \end{macrocode}
+%
+% \subsection{Stack based examples}
+%
+% We now provide an example of standard use of just the stack based
+% functionality. To do this we create a stack, push three things onto the stack
+% and then pop all three things back off, all in a nice linear fashion.
+%
+%    \begin{macrocode}
+%<*qstest>
+\begin{qstest}{Simple stack integration test}
+  {\FSCreate, \FSPush, \FSPop, \FSTop}
+  
+  \FSCreate{testStack}{defaultValue}
+  \Expect*{\FSTop{testStack}}{defaultValue}
+  \FSPush{testStack}{firstValue}
+  \Expect*{\FSTop{testStack}}{firstValue}
+  \FSPush{testStack}{secondValue}
+  \Expect*{\FSTop{testStack}}{secondValue}
+  \FSPush{testStack}{thirdValue}
+  \Expect*{\FSTop{testStack}}{thirdValue}
+  \FSPop{testStack}
+  \Expect*{\FSTop{testStack}}{secondValue}
+  \FSPop{testStack}
+  \Expect*{\FSTop{testStack}}{firstValue}
+  \FSPop{testStack}
+  \Expect*{\FSTop{testStack}}{defaultValue}
+  \FSPop{testStack}
+  \Expect*{\FSTop{testStack}}{defaultValue}
+\end{qstest}
+%</qstest>
+%    \end{macrocode}
+%
+% We now look at using the stack in a non-linear order pushing, popping, then
+% pushing and popping again.
+%
+%    \begin{macrocode}
+%<*qstest>
+\begin{qstest}{Up down up down stack integration test}
+  {\FSCreate, \FSPush, \FSPop, \FSTop}
+  
+  \FSCreate{testStackUDUD}{defaultValue}
+  \Expect*{\FSTop{testStackUDUD}}{defaultValue}
+  \FSPush{testStackUDUD}{firstValue}
+  \Expect*{\FSTop{testStackUDUD}}{firstValue}
+  \FSPush{testStackUDUD}{secondValue}
+  \Expect*{\FSTop{testStackUDUD}}{secondValue}
+  \FSPop{testStackUDUD}
+  \Expect*{\FSTop{testStackUDUD}}{firstValue}
+  \FSPush{testStackUDUD}{newSecondValue}
+  \Expect*{\FSTop{testStackUDUD}}{newSecondValue}
+\end{qstest}
+%</qstest>
+%    \end{macrocode}
+%
+% \subsection{FIFO/Stack based examples}
+%
+% This time we make use of \verb|\FSPush| to put items onto the FIFO and
+% \verb|\FSShift| to take them off in a \emph{first in first off} order.  At the
+% end we shift past the top of the FIFO/Stack, and so we should get the default
+% value again.
+%
+%    \begin{macrocode}
+%<*qstest>
+\begin{qstest}{Simple FIFO integration test}
+  {\FSCreate, \FSPush, \FSShift, \FSTop, \FSBottom}
+  
+  \FSCreate{testFifo}{defaultValue}
+  \Expect*{\FSTop{testFifo}}{defaultValue}
+  \Expect*{\FSBottom{testFifo}}{defaultValue}
+  \FSPush{testFifo}{firstValue}
+  \Expect*{\FSTop{testFifo}}{firstValue}
+  \Expect*{\FSBottom{testFifo}}{firstValue}
+  \FSPush{testFifo}{secondValue}
+  \Expect*{\FSTop{testFifo}}{secondValue}
+  \Expect*{\FSBottom{testFifo}}{firstValue}
+  \FSShift{testFifo}
+  \Expect*{\FSTop{testFifo}}{secondValue}
+  \Expect*{\FSBottom{testFifo}}{secondValue}
+  \FSPush{testFifo}{thirdValue}
+  \Expect*{\FSTop{testFifo}}{thirdValue}
+  \Expect*{\FSBottom{testFifo}}{secondValue}
+  \FSShift{testFifo}
+  \Expect*{\FSTop{testFifo}}{thirdValue}
+  \Expect*{\FSBottom{testFifo}}{thirdValue}
+  \FSShift{testFifo}
+  \Expect*{\FSTop{testFifo}}{defaultValue}
+  \Expect*{\FSBottom{testFifo}}{defaultValue}
+  \FSShift{testFifo}
+  \Expect*{\FSTop{testFifo}}{defaultValue}
+  \Expect*{\FSBottom{testFifo}}{defaultValue}
+\end{qstest}
+%</qstest>
+%    \end{macrocode}
+%
+% We now provide an example use of \verb|\FSUnshift| and \verb|\FSShift|.
+%
+%    \begin{macrocode}
+%<*qstest>
+\begin{qstest}{Simple linear use of unshift/shift}
+  {\FSUnshift, \FSShift}
+  
+  \FSCreate{testRStack}{defaultValue}
+  \Expect*{\FSBottom{testRStack}}{defaultValue}
+  \FSUnshift{testRStack}{firstValue}
+  \Expect*{\FSBottom{testRStack}}{firstValue}
+  \FSUnshift{testRStack}{secondValue}
+  \Expect*{\FSBottom{testRStack}}{secondValue}
+  \FSUnshift{testRStack}{thirdValue}
+  \Expect*{\FSBottom{testRStack}}{thirdValue}
+  \FSShift{testRStack}
+  \Expect*{\FSBottom{testRStack}}{secondValue}
+  \FSShift{testRStack}
+  \Expect*{\FSBottom{testRStack}}{firstValue}
+  \FSShift{testRStack}
+  \Expect*{\FSBottom{testRStack}}{defaultValue}  
+  \FSShift{testRStack}
+  \Expect*{\FSBottom{testRStack}}{defaultValue}  
+\end{qstest}
+%</qstest>
+%    \end{macrocode}
+%
+% Now we provide an example (non-linear) use of all of the \verb|\FSPush|,
+% \verb|\FSPop|, \verb|\FSUnshift|, and \verb|\FSShift| macros
+%
+%    \begin{macrocode}
+%<*qstest>
+\begin{qstest}{Full non-linear FIFO/stack integration test}
+  {\FSCreate, \FSPush, \FSPop, \FSUnshift, \FSShift, \FSTop, \FSBottom}
+  
+  \FSCreate{testFS}{defaultValue}
+  \Expect*{\FSTop{testFS}}{defaultValue}
+  \Expect*{\FSBottom{testFS}}{defaultValue}
+  \FSPush{testFS}{value1}
+  \Expect*{\FSTop{testFS}}{value1}
+  \Expect*{\FSBottom{testFS}}{value1}
+  \FSUnshift{testFS}{value-1}
+  \Expect*{\FSTop{testFS}}{value1}
+  \Expect*{\FSBottom{testFS}}{value-1}
+  \FSShift{testFS}
+  \Expect*{\FSTop{testFS}}{value1}
+  \Expect*{\FSBottom{testFS}}{value1}
+  \FSPush{testFS}{value2}
+  \Expect*{\FSTop{testFS}}{value2}
+  \Expect*{\FSBottom{testFS}}{value1}
+  \FSUnshift{testFS}{value-1again}
+  \Expect*{\FSTop{testFS}}{value2}
+  \Expect*{\FSBottom{testFS}}{value-1again}
+  \FSUnshift{testFS}{value-2}
+  \Expect*{\FSTop{testFS}}{value2}
+  \Expect*{\FSBottom{testFS}}{value-2}
+  \FSPop{testFS}
+  \Expect*{\FSTop{testFS}}{value1}
+  \Expect*{\FSBottom{testFS}}{value-2}
+  \FSPop{testFS}
+  \Expect*{\FSTop{testFS}}{value-1again}
+  \Expect*{\FSBottom{testFS}}{value-2}
+  \FSShift{testFS}
+  \Expect*{\FSTop{testFS}}{value-1again}
+  \Expect*{\FSBottom{testFS}}{value-1again}
+  \FSPop{testFS}
+  \Expect*{\FSTop{testFS}}{defaultValue}
+  \Expect*{\FSBottom{testFS}}{defaultValue}
+  \FSPop{testFS}
+  \Expect*{\FSTop{testFS}}{defaultValue}
+  \Expect*{\FSBottom{testFS}}{defaultValue}
+  \FSShift{testFS}
+  \Expect*{\FSTop{testFS}}{defaultValue}
+  \Expect*{\FSBottom{testFS}}{defaultValue}
+\end{qstest}
+%</qstest>
+%    \end{macrocode}
+%
+% Finally we add an integration test of the full suite, including
+% \verb|\FSClear|, \verb|\FSSize|, and \verb|\FSDestroy| macros
+%
+%    \begin{macrocode}
+%<*qstest>
+\begin{qstest}{FSClear, FSSize, and FSDestroy test}
+  {\FSCreate, \FSPush, \FSPop, \FSUnshift, \FSShift, \FSTop, 
+   \FSBottom, \FSClear, \FSDestroy, \FSSize}
+  
+  \FSCreate{testFSC}{defaultValue}
+  \Expect*{\FSSize{testFSC}}{0}
+  \Expect*{\FSTop{testFSC}}{defaultValue}
+  \Expect*{\FSBottom{testFSC}}{defaultValue}
+  \FSPush{testFSC}{value1}
+  \Expect*{\FSSize{testFSC}}{1}
+  \Expect*{\FSTop{testFSC}}{value1}
+  \Expect*{\FSBottom{testFSC}}{value1}
+  \FSUnshift{testFSC}{value-1}
+  \Expect*{\FSSize{testFSC}}{2}
+  \Expect*{\FSTop{testFSC}}{value1}
+  \Expect*{\FSBottom{testFSC}}{value-1}
+  \FSPush{testFSC}{value2}
+  \Expect*{\FSSize{testFSC}}{3}
+  \Expect*{\FSTop{testFSC}}{value2}
+  \Expect*{\FSBottom{testFSC}}{value-1}
+  \FSUnshift{testFSC}{value-2}
+  \Expect*{\FSSize{testFSC}}{4}
+  \Expect*{\FSTop{testFSC}}{value2}
+  \Expect*{\FSBottom{testFSC}}{value-2}
+  \FSClear{testFSC}
+  \Expect*{\FSSize{testFSC}}{0}
+  \Expect*{\FSTop{testFSC}}{defaultValue}
+  \Expect*{\FSBottom{testFSC}}{defaultValue}
+  \FSPush{testFSC}{value1}
+  \Expect*{\FSSize{testFSC}}{1}
+  \Expect*{\FSTop{testFSC}}{value1}
+  \Expect*{\FSBottom{testFSC}}{value1}
+  \FSUnshift{testFSC}{value-1}
+  \Expect*{\FSSize{testFSC}}{2}
+  \Expect*{\FSTop{testFSC}}{value1}
+  \Expect*{\FSBottom{testFSC}}{value-1}
+  \FSPush{testFSC}{value2}
+  \Expect*{\FSSize{testFSC}}{3}
+  \Expect*{\FSTop{testFSC}}{value2}
+  \Expect*{\FSBottom{testFSC}}{value-1}
+  \FSUnshift{testFSC}{value-2}
+  \Expect*{\FSSize{testFSC}}{4}
+  \Expect*{\FSTop{testFSC}}{value2}
+  \Expect*{\FSBottom{testFSC}}{value-2}
+  \FSDestroy{testFSC}
+\end{qstest}
+%</qstest>
+%    \end{macrocode}
+%
+% \section{Code for the FIFO/stack package}
+%
+% \subsection{Identification}
+%
+%    \begin{macrocode}
+%<*package>
+\ProvidesPackage{fifo-stack}[2014/03/24 v1.0 Multi-FIFO/stack system]
+\RequirePackage{ifthen}
+%    \end{macrocode}
+%
+% \subsection{FIFO/stack creation and destruction macro definitions}
+%
+% In the following code, we use only three counters (in the \TeX\ meaning) we
+% store the various values in macros, and use only the top, bottom or size
+% counters when we need to do computations.
+%
+% \begin{macro}{\tmp@fifo@stack@top}
+%    \begin{macrocode}
+\newcount\tmp@fifo@stack@top
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\tmp@fifo@stack@bottom}
+%    \begin{macrocode}
+\newcount\tmp@fifo@stack@bottom
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\tmp@fifo@stack@size}
+%    \begin{macrocode}
+\newcount\tmp@fifo@stack@size
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\fifo@stack@pointer}
+%
+% All items in a given FIFO/stack named \verb|fifoStackName| are stored in
+% dynamically defined macros whose names consist of the \verb|fifoStackName|
+% followed by \verb|@| followed by the value of the \verb|\fifo@stack@pointer|
+% macro with either \verb|\tmp@fifo@stack@top| or \verb|\tmp@fifo@stack@bottom|
+% counters as argument.
+%
+% We start by providing a unit test of the expected behaviour of the\\
+% \verb|\fifo@stack@pointer| macro.
+%
+%    \begin{macrocode}
+%</package>
+%<*qstest>
+\begin{qstest}{Unit test of \fifo@stack@pointer}{\fifo@stack@pointer}
+  \makeatletter
+  \Expect*{\fifo@stack@pointer{1}}{ii}
+  \Expect*{\fifo@stack@pointer{0}}{i}
+  \Expect*{\fifo@stack@pointer{-1}}{@i}
+  \makeatother
+\end{qstest}
+%</qstest>
+%<*package>
+%    \end{macrocode}
+%
+% Now the macrocode itself. Note the only two uses of the $\varepsilon$-\TeX\
+% \verb|\numexpr| macro.
+%
+%    \begin{macrocode}
+\global\def\fifo@stack@pointer#1{%
+  \ifnum#1<0
+    @\expandafter\romannumeral\numexpr -1*#1 \relax
+  \else
+    \expandafter\romannumeral\numexpr #1+1 \relax
+  \fi
+}
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\FSCreate}
+%
+% Creating a new FIFO/stack is, essentially, creating new counter-like top,
+% bottom and size macros, initializing them to 0, 1 and 0 respectively, as well
+% as creating macros for stack-top and stack-bottom evaluation (see next two
+% macros below).
+%
+%    \begin{macrocode}
+%txs\FSCreate{fifoStackName}{defaultValue}#
+\newcommand\FSCreate[2]{%
+  \expandafter\gdef\csname #1@fifo@stack@count@top\endcsname{0}%
+  \expandafter\gdef\csname #1@fifo@stack@count@bottom\endcsname{1}%
+  \expandafter\gdef\csname #1@fifo@stack@count@size\endcsname{0}%
+  \expandafter\do@fifo@stack@top@macro%
+    \csname #1@fifo@stack@count@top\endcsname{#1}{#2}%
+  \expandafter\do@fifo@stack@bottom@macro%
+    \csname #1@fifo@stack@count@bottom\endcsname{#1}{#2}%
+}
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\do@fifo@stack@top@macro}
+%
+% This stack-top evaluation macro is required due to an ugly trick. During the
+% push, we ``evaluate'' the value to push with an \verb|\edef|, because one
+% might want to push something which contains the previous top of the stack (see
+% the example package provided). If the \verb|\FSTop| or \verb|FSBottom| macros
+% compute the real value on the top or bottom of the stack, then, the expanded
+% definition in \verb|\FSPush| will contain more or less the \emph{content} of
+% \verb|\FSTop| and not the value.
+%
+%  Another way would be to have a \verb|\csname...\endcsname| pair within
+%  another one in an \verb|\ifx| condition, which doesn't work.
+%
+%    \begin{macrocode}
+\newcommand\do@fifo@stack@top@macro[3]{%
+  \expandafter\newcommand\expandafter*%
+  \csname fifo@stack@top@#2\endcsname{%
+    \expandafter\ifx\csname #2@\fifo@stack@pointer#1\endcsname\relax
+      #3%
+    \else
+      \csname #2@\fifo@stack@pointer#1\endcsname
+    \fi
+  }%
+}
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\do@fifo@stack@bottom@macro}
+%
+% This is the stack-bottom macro defined for the same reasons as
+% \verb|\do@fifo@stack@top@macro| (see above).
+%
+%    \begin{macrocode}
+\newcommand\do@fifo@stack@bottom@macro[3]{%
+  \expandafter\newcommand\expandafter*%
+  \csname fifo@stack@bottom@#2\endcsname{%
+    \expandafter\ifx\csname #2@\fifo@stack@pointer#1\endcsname\relax
+      #3%
+    \else
+      \csname #2@\fifo@stack@pointer#1\endcsname
+    \fi
+  }%
+}
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\FSClear}
+%
+% While the size of the FIFO/stack is greater than zero, pop the FIFO/stack.
+% Note the only use of the \verb|ifthen| package's \verb|\whiledo| macro.
+%
+%    \begin{macrocode}
+%txs\FSClear{fifoStackName}#
+\newcommand{\FSClear}[1]{%
+  \whiledo{0 < \FSSize{#1}}{\FSPop{#1}}
+}
+%    \end{macrocode}
+
+% \end{macro}
+%
+% \begin{macro}{\FSDestroy}
+%
+% Clear the FIFO/stack and then undefine all of the supporting macros.
+%
+% We provide a unit test of the expected behaviour of the \verb|\FSDestroy|
+% macro.
+%
+%    \begin{macrocode}
+%</package>
+%<*qstest>
+\begin{qstest}{Unit test of \FSdestroy}
+  {\FSCreate, \FSDestroy}
+  
+  \FSCreate{testFSDestroy}{defaultValue}
+  \makeatletter
+  \ExpectIfThen{\isnamedefined{testFSDestroy@fifo@stack@count@top}}
+  \ExpectIfThen{\isnamedefined{testFSDestroy@fifo@stack@count@bottom}}
+  \ExpectIfThen{\isnamedefined{testFSDestroy@fifo@stack@count@size}}
+  \ExpectIfThen{\isnamedefined{fifo@stack@top@testFSDestroy}}
+  \ExpectIfThen{\isnamedefined{fifo@stack@bottom@testFSDestroy}}
+  \makeatother
+  \FSDestroy{testFSDestroy}
+  \makeatletter
+  \ExpectIfThen{\isundefined\testFSDestroy@fifo@stack@count@top}
+  \ExpectIfThen{\isundefined\testFSDestroy@fifo@stack@count@bottom}
+  \ExpectIfThen{\isundefined\testFSDestroy@fifo@stack@count@size}
+  \ExpectIfThen{\isundefined\fifo@stack@top@testFSDestroy}
+  \ExpectIfThen{\isundefined\fifo@stack@bottom@testFSDestroy}
+  \makeatother
+\end{qstest}
+%</qstest>
+%<*package>
+%    \end{macrocode}
+%
+% And now the macrocode for \verb|\FSDestroy|.
+%
+%    \begin{macrocode}
+%txs\FSDestroy{fifoStackName}#
+\newcommand{\FSDestroy}[1]{%
+  \FSClear{#1}
+  \expandafter\global\expandafter\let
+    \csname #1@fifo@stack@count@top\endcsname=
+      \fifo@stack@never@defined\relax
+  \expandafter\global\expandafter\let
+    \csname #1@fifo@stack@count@bottom\endcsname=
+      \fifo@stack@never@defined\relax
+  \expandafter\global\expandafter\let
+    \csname #1@fifo@stack@count@size\endcsname=
+      \fifo@stack@never@defined\relax
+  \expandafter\global\expandafter\let
+    \csname fifo@stack@top@#1\endcsname=
+      \fifo@stack@never@defined\relax
+  \expandafter\global\expandafter\let
+    \csname fifo@stack@bottom@#1\endcsname=
+      \fifo@stack@never@defined\relax
+}
+%    \end{macrocode}
+% \end{macro}
+%
+% \subsection{Stack based macro definitions}
+%
+% \begin{macro}{\FSTop}
+% I'd rather remove the ``check'' code, but, well, it would suppose
+% the end-user of the macro is a fair developer, which is not
+% realistic.
+% 
+% If the stack has been properly created, we call the top-stack evaluation
+% macro.
+%
+%    \begin{macrocode}
+%txs\FSTop{fifoStackName}#
+\newcommand\FSTop[1]{%
+  \ifx\csname #1@fifo@stack@count@top\endcsname\relax
+    \PackageError{fifo-stack}{Undefined FIFO/stack #1}%
+      {You should first create the FIFO/stack with \FSCreate}%
+  \else
+    \csname fifo@stack@top@#1\endcsname
+  \fi
+}
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\FSPush}
+% The \verb|\FSPush| macro is one of the most complex ones.
+%
+% We provide a unit test of the ability to use \verb|\FSTop| inside the value
+% argument to a \verb|\FSPush| macro (which is the reason for the complexity of
+% this macro).
+%
+%    \begin{macrocode}
+%</package>
+%<*qstest>
+\begin{qstest}{Unit test of \FSPush and \FSTop}
+  {\FSCreate, \FSPush, \FSTop}
+  
+  \FSCreate{testFSPush}{defaultValue}
+  \Expect*{\FSTop{testFSPush}}{defaultValue}
+  \FSPush{testFSPush}{\FSTop{testFSPush}-with-additional-text}
+  \Expect*{\FSTop{testFSPush}}{defaultValue-with-additional-text}
+\end{qstest}
+%</qstest>
+%<*package>
+%    \end{macrocode}
+%
+% And now the macrocode for \verb|\FSPush|. First, we check if the stack is
+% properly defined.
+%
+%    \begin{macrocode}
+%txs\FSPush{fifoStackName}{value}#
+\newcommand\FSPush[2]{%
+  \ifx\csname #1@fifo@stack@count@top\endcsname\relax
+    \PackageError{fifo-stack}{Undefined FIFO/stack #1}%
+      {You should first create the FIFO/stack with \FSCreate}%
+  \else
+%    \end{macrocode}
+%
+% We store the new top-value in a macro, just because one might do
+% \begin{quote}
+% \verb|\FSPush{stack}{\FSTop{stack}.ext}|
+% \end{quote}
+% in which case the expansion of
+% the value to push is something rather tricky.
+%
+% Then, we step the top of the stack (put the top in the scratch
+% counter, advance this counter, have the value back in the macro).
+%
+% We separately adjust the size macro. We do this since actually computing the
+% value in the \verb|\FSSize| macro proved difficult.
+%
+% Only after that, the value to be pushed is stored in the corresponding
+% slot.
+%    \begin{macrocode}
+    \edef\fifo@stack@newtop{#2}%
+    \tmp@fifo@stack@top\csname #1@fifo@stack@count@top\endcsname\relax
+    \global\advance\tmp@fifo@stack@top by 1\relax
+    \expandafter\xdef\csname #1@fifo@stack@count@top\endcsname
+      {\the\tmp@fifo@stack@top}%
+    \tmp@fifo@stack@size\csname #1@fifo@stack@count@size\endcsname\relax
+    \global\advance\tmp@fifo@stack@size by 1\relax
+    \expandafter\xdef\csname #1@fifo@stack@count@size\endcsname
+      {\the\tmp@fifo@stack@size}%
+    \expandafter\xdef\csname #1@\fifo@stack@pointer\tmp@fifo@stack@top\endcsname
+      {\fifo@stack@newtop}%
+  \fi
+}
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\FSPop}
+% The \verb|\FSPop| macro is simpler: if the stack is properly defined and
+% the stack-top is greater than or equal to the stack-bottom, then we undefine
+% the existing `top' macro and down-step the stack-top and stack-size.
+%    \begin{macrocode}
+%txs\FSPop{fifoStackName}#
+\newcommand\FSPop[1]{%
+  \ifx\csname #1@fifo@stack@count@top\endcsname\relax
+    \PackageError{fifo-stack}{Undefined FIFO/stack #1}%
+      {You should first create the FIFO/stack with \FSCreate}%
+  \else
+    \tmp@fifo@stack@top\csname #1@fifo@stack@count@top\endcsname\relax
+    \tmp@fifo@stack@bottom\csname #1@fifo@stack@count@bottom\endcsname\relax
+    \ifnum\tmp@fifo@stack@top<\tmp@fifo@stack@bottom\relax\else
+      \expandafter\global\expandafter\let
+        \csname #1@\fifo@stack@pointer\tmp@fifo@stack@top\endcsname=
+          \fifo@stack@never@defined\relax
+      \advance\tmp@fifo@stack@top by -1\relax
+      \expandafter\xdef\csname #1@fifo@stack@count@top\endcsname
+        {\the\tmp@fifo@stack@top}%
+      \tmp@fifo@stack@size\csname #1@fifo@stack@count@size\endcsname\relax
+      \global\advance\tmp@fifo@stack@size by -1\relax
+      \expandafter\xdef\csname #1@fifo@stack@count@size\endcsname
+        {\the\tmp@fifo@stack@size}%
+    \fi
+  \fi
+}
+%    \end{macrocode}
+% \end{macro}
+%
+% Now, a debug only macro.
+% \begin{macro}{\FSShowTop}
+%    \begin{macrocode}
+%txs\FSShowTop{fifoStackName}#
+\newcommand\FSShowTop[1]{%
+  {\edef\fifo@stack@top{\FSTop{#1}}%
+   \typeout{The top of #1: \fifo@stack@top}}}
+%    \end{macrocode}
+% \end{macro}
+%
+% \subsection{FIFO based macro definitions}
+%
+% \begin{macro}{\FSBottom}
+%    \begin{macrocode}
+%txs\FSBottom{fifoStackName}#
+\newcommand\FSBottom[1]{%
+  \ifx\csname #1@fifo@stack@count@bottom\endcsname\relax
+    \PackageError{fifo-stack}{Undefined FIFO/stack #1}%
+      {You should first create the FIFO/stack with \FSCreate}%
+  \else
+    \csname fifo@stack@bottom@#1\endcsname
+  \fi
+}
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\FSUnshift}
+% The \verb|\FSUnshift| macro, like the corresponding \verb|\FSPush| macro, is
+% one of the most complex ones.
+%
+% % We provide a unit test of the ability to use \verb|\FSBottom| inside the value
+% argument to a \verb|\FSUnshift| macro (which is the reason for the complexity of
+% this macro).
+%
+%    \begin{macrocode}
+%</package>
+%<*qstest>
+\begin{qstest}{Unit test of \FSUnshift and \FSBottom}
+  {\FSCreate, \FSUnshift, \FSBottom}
+  
+  \FSCreate{testFSUnshift}{defaultValue}
+  \Expect*{\FSBottom{testFSUnshift}}{defaultValue}
+  \FSUnshift{testFSUnshift}{\FSBottom{testFSUnshift}-with-additional-text}
+  \Expect*{\FSBottom{testFSUnshift}}{defaultValue-with-additional-text}
+\end{qstest}
+%</qstest>
+%<*package>
+%    \end{macrocode}
+%
+% And now the macrocode for \verb|\FSUnshift|. First, we check if the stack is
+% properly defined.
+%
+%    \begin{macrocode}
+%txs\FSUnshift{fifoStackName}{value}#
+\newcommand\FSUnshift[2]{%
+  \ifx\csname #1@fifo@stack@count@bottom\endcsname\relax
+    \PackageError{fifo-stack}{Undefined FIFO/stack #1}%
+      {You should first create the FIFO/stack with \FSCreate}%
+  \else
+%    \end{macrocode}
+%
+% We store the new bottom-value in a macro, just because one might do
+% \begin{quote}
+% \verb|\FSUnshift{stack}{\FSBottom{stack}.ext}|
+% \end{quote}
+% in which case the expansion of
+% the value to push is something rather tricky.
+%
+% Then, we step the bottom of the stack (put the bottom in the scratch
+% counter, decrement this counter, have the value back in the macro).
+%
+% We separately adjust the size macro. We do this since actually computing the
+% value in the \verb|\FSSize| macro proved difficult.
+%
+% Only after that, the value to be unshifted is stored in the corresponding
+% slot.
+%    \begin{macrocode}
+    \edef\fifo@stack@newBottom{#2}%
+    \tmp@fifo@stack@bottom\csname #1@fifo@stack@count@bottom\endcsname\relax
+    \global\advance\tmp@fifo@stack@bottom by -1\relax
+    \expandafter\xdef\csname #1@fifo@stack@count@bottom\endcsname
+      {\the\tmp@fifo@stack@bottom}%
+    \tmp@fifo@stack@size\csname #1@fifo@stack@count@size\endcsname\relax
+    \global\advance\tmp@fifo@stack@size by 1\relax
+    \expandafter\xdef\csname #1@fifo@stack@count@size\endcsname
+      {\the\tmp@fifo@stack@size}%
+    \expandafter\xdef\csname #1@\fifo@stack@pointer\tmp@fifo@stack@bottom\endcsname
+      {\fifo@stack@newBottom}%
+  \fi
+}
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\FSShift}
+% The \verb|\FSShift| macro is fairly simple: if the stack is properly defined
+% and the stack-top is greater than or equal to the stack-bottom, then we undefine
+% the `bottom' macro and up-step the stack-bottom and adjust the stack-size.
+%    \begin{macrocode}
+%txs\FSShift{fifoStackName}#
+\newcommand\FSShift[1]{%
+  \ifx\csname #1@fifo@stack@count@bottom\endcsname\relax
+    \PackageError{fifo-stack}{Undefined FIFO/stack #1}%
+      {You should first create the FIFO/stack with \FSCreate}%
+  \else
+    \tmp@fifo@stack@top\csname #1@fifo@stack@count@top\endcsname\relax
+    \tmp@fifo@stack@bottom\csname #1@fifo@stack@count@bottom\endcsname\relax
+    \ifnum\tmp@fifo@stack@top<\tmp@fifo@stack@bottom\relax\else
+      \expandafter\global\expandafter\let
+        \csname #1@\fifo@stack@pointer\tmp@fifo@stack@bottom\endcsname=
+          \fifo@stack@never@defined\relax
+      \advance\tmp@fifo@stack@bottom by 1\relax
+      \expandafter\xdef\csname #1@fifo@stack@count@bottom\endcsname
+        {\the\tmp@fifo@stack@bottom}%
+      \tmp@fifo@stack@size\csname #1@fifo@stack@count@size\endcsname\relax
+      \global\advance\tmp@fifo@stack@size by -1\relax
+      \expandafter\xdef\csname #1@fifo@stack@count@size\endcsname
+        {\the\tmp@fifo@stack@size}%
+    \fi
+  \fi
+}
+%    \end{macrocode}
+% \end{macro}
+%
+% Again, a debug only macro for the FIFO usage.
+% \begin{macro}{\FSShowBottom}
+%    \begin{macrocode}
+%txs\FSShowBottom{fifoStackName}#
+\newcommand\FSShowBottom[1]{%
+  {\edef\fifo@stack@bottom{\FSBottom{#1}}%
+   \typeout{The bottom of #1: \fifo@stack@bottom}}}
+%    \end{macrocode}
+% \end{macro}
+%
+% \subsection{FIFO/stack length macro definition}
+%
+% \begin{macro}{\FSSize}
+%
+% We keep track of the changes to the stack-size in each of the \verb|\FSPush|,
+% \verb|\FSPop|, \verb|\FSUnshift|, and \verb|\FSShift| macros, since actually
+% computing the value in the \verb|\FSSize| macro (below) was returning spurious
+% tokens.
+%
+%    \begin{macrocode}
+%txs\FSSize{fifoStackName}#
+\newcommand\FSSize[1]{\csname #1@fifo@stack@count@size\endcsname}
+%    \end{macrocode}
+% \end{macro}
+%
+% \subsection{Finishing off}
+%
+%    \begin{macrocode}
+%</package>
+%<*qstest>
+\LogClose{lgout}
+\stop
+%</qstest>
+%    \end{macrocode}
+%
\ No newline at end of file
diff --git a/Master/texmf-dist/source/latex/fifo-stack/fifo-stack.ins b/Master/texmf-dist/source/latex/fifo-stack/fifo-stack.ins
new file mode 100644
index 00000000000..6e3ee5e0190
--- /dev/null
+++ b/Master/texmf-dist/source/latex/fifo-stack/fifo-stack.ins
@@ -0,0 +1,45 @@
+\def\batchfile{fifo-stack.ins}
+
+\input{docstrip.tex}
+
+\preamble
+
+Copyright (C) 2014 Stephen Gaito (PerceptiSys Ltd)
+
+This work may be distributed and/or modified under the conditions of the LaTeX
+Project Public License, either version  1.3  of  this license or (at your
+option) any later version.
+
+The latest version of this license is in http://www.latex-project.org/lppl.txt
+and  version 1.3 or later is part of all distributions of LaTeX version
+2005/12/01 or later.
+
+This work has the LPPL maintenance status `maintained'.
+
+The Current Maintainer of this work is Stephen Gaito.
+
+The released source can be found at:
+https://github.com/diSimplex/latexFifoStack/tree/master/texStyle
+
+The development source can be found at:
+https://github.com/stephengaito/latexFifoStack/tree/master/texStyle
+
+This work consists of the files fifo-stack.dtx, and fifo-stack.ins. 
+
+The command:
+  pdflatex fifo-stack.ins
+followed by:
+  pdflatex fifo-stack.dtx
+will produce the derived files: fifo-stack.sty, fifo-stack-test.tex,
+and fifo-stack.pdf.
+
+The command:
+  pdflatex fifo-stack-test.tex
+will regression test the fifo-stack package. Output will be found in
+fifo-stack-test.lgout. If pdflatex completes with no errors, then all
+regression tests passed.
+
+\endpreamble
+
+\generateFile{fifo-stack.sty}{f}{\from{fifo-stack.dtx}{package}}
+\generateFile{fifo-stack-test.tex}{f}{\from{fifo-stack.dtx}{qstest}}
diff --git a/Master/texmf-dist/tex/latex/fifo-stack/fifo-stack.sty b/Master/texmf-dist/tex/latex/fifo-stack/fifo-stack.sty
new file mode 100644
index 00000000000..95a2b746f19
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/fifo-stack/fifo-stack.sty
@@ -0,0 +1,210 @@
+%%
+%% This is file `fifo-stack.sty',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% fifo-stack.dtx  (with options: `package')
+%% 
+%% Copyright (C) 2014 Stephen Gaito (PerceptiSys Ltd)
+%% 
+%% This work may be distributed and/or modified under the conditions of the LaTeX
+%% Project Public License, either version  1.3  of  this license or (at your
+%% option) any later version.
+%% 
+%% The latest version of this license is in http://www.latex-project.org/lppl.txt
+%% and  version 1.3 or later is part of all distributions of LaTeX version
+%% 2005/12/01 or later.
+%% 
+%% This work has the LPPL maintenance status `maintained'.
+%% 
+%% The Current Maintainer of this work is Stephen Gaito.
+%% 
+%% The released source can be found at:
+%% https://github.com/diSimplex/latexFifoStack/tree/master/texStyle
+%% 
+%% The development source can be found at:
+%% https://github.com/stephengaito/latexFifoStack/tree/master/texStyle
+%% 
+%% This work consists of the files fifo-stack.dtx, and fifo-stack.ins.
+%% 
+%% The command:
+%%   pdflatex fifo-stack.ins
+%% followed by:
+%%   pdflatex fifo-stack.dtx
+%% will produce the derived files: fifo-stack.sty, fifo-stack-test.tex,
+%% and fifo-stack.pdf.
+%% 
+%% The command:
+%%   pdflatex fifo-stack-test.tex
+%% will regression test the fifo-stack package. Output will be found in
+%% fifo-stack-test.lgout. If pdflatex completes with no errors, then all
+%% regression tests passed.
+%% 
+\ProvidesPackage{fifo-stack}[2014/03/24 v1.0 Multi-FIFO/stack system]
+\RequirePackage{ifthen}
+\newcount\tmp@fifo@stack@top
+\newcount\tmp@fifo@stack@bottom
+\newcount\tmp@fifo@stack@size
+\global\def\fifo@stack@pointer#1{%
+  \ifnum#1<0
+    @\expandafter\romannumeral\numexpr -1*#1 \relax
+  \else
+    \expandafter\romannumeral\numexpr #1+1 \relax
+  \fi
+}
+\newcommand\FSCreate[2]{%
+  \expandafter\gdef\csname #1@fifo@stack@count@top\endcsname{0}%
+  \expandafter\gdef\csname #1@fifo@stack@count@bottom\endcsname{1}%
+  \expandafter\gdef\csname #1@fifo@stack@count@size\endcsname{0}%
+  \expandafter\do@fifo@stack@top@macro%
+    \csname #1@fifo@stack@count@top\endcsname{#1}{#2}%
+  \expandafter\do@fifo@stack@bottom@macro%
+    \csname #1@fifo@stack@count@bottom\endcsname{#1}{#2}%
+}
+\newcommand\do@fifo@stack@top@macro[3]{%
+  \expandafter\newcommand\expandafter*%
+  \csname fifo@stack@top@#2\endcsname{%
+    \expandafter\ifx\csname #2@\fifo@stack@pointer#1\endcsname\relax
+      #3%
+    \else
+      \csname #2@\fifo@stack@pointer#1\endcsname
+    \fi
+  }%
+}
+\newcommand\do@fifo@stack@bottom@macro[3]{%
+  \expandafter\newcommand\expandafter*%
+  \csname fifo@stack@bottom@#2\endcsname{%
+    \expandafter\ifx\csname #2@\fifo@stack@pointer#1\endcsname\relax
+      #3%
+    \else
+      \csname #2@\fifo@stack@pointer#1\endcsname
+    \fi
+  }%
+}
+\newcommand{\FSClear}[1]{%
+  \whiledo{0 < \FSSize{#1}}{\FSPop{#1}}
+}
+
+\newcommand{\FSDestroy}[1]{%
+  \FSClear{#1}
+  \expandafter\global\expandafter\let
+    \csname #1@fifo@stack@count@top\endcsname=
+      \fifo@stack@never@defined\relax
+  \expandafter\global\expandafter\let
+    \csname #1@fifo@stack@count@bottom\endcsname=
+      \fifo@stack@never@defined\relax
+  \expandafter\global\expandafter\let
+    \csname #1@fifo@stack@count@size\endcsname=
+      \fifo@stack@never@defined\relax
+  \expandafter\global\expandafter\let
+    \csname fifo@stack@top@#1\endcsname=
+      \fifo@stack@never@defined\relax
+  \expandafter\global\expandafter\let
+    \csname fifo@stack@bottom@#1\endcsname=
+      \fifo@stack@never@defined\relax
+}
+\newcommand\FSTop[1]{%
+  \ifx\csname #1@fifo@stack@count@top\endcsname\relax
+    \PackageError{fifo-stack}{Undefined FIFO/stack #1}%
+      {You should first create the FIFO/stack with \FSCreate}%
+  \else
+    \csname fifo@stack@top@#1\endcsname
+  \fi
+}
+\newcommand\FSPush[2]{%
+  \ifx\csname #1@fifo@stack@count@top\endcsname\relax
+    \PackageError{fifo-stack}{Undefined FIFO/stack #1}%
+      {You should first create the FIFO/stack with \FSCreate}%
+  \else
+    \edef\fifo@stack@newtop{#2}%
+    \tmp@fifo@stack@top\csname #1@fifo@stack@count@top\endcsname\relax
+    \global\advance\tmp@fifo@stack@top by 1\relax
+    \expandafter\xdef\csname #1@fifo@stack@count@top\endcsname
+      {\the\tmp@fifo@stack@top}%
+    \tmp@fifo@stack@size\csname #1@fifo@stack@count@size\endcsname\relax
+    \global\advance\tmp@fifo@stack@size by 1\relax
+    \expandafter\xdef\csname #1@fifo@stack@count@size\endcsname
+      {\the\tmp@fifo@stack@size}%
+    \expandafter\xdef\csname #1@\fifo@stack@pointer\tmp@fifo@stack@top\endcsname
+      {\fifo@stack@newtop}%
+  \fi
+}
+\newcommand\FSPop[1]{%
+  \ifx\csname #1@fifo@stack@count@top\endcsname\relax
+    \PackageError{fifo-stack}{Undefined FIFO/stack #1}%
+      {You should first create the FIFO/stack with \FSCreate}%
+  \else
+    \tmp@fifo@stack@top\csname #1@fifo@stack@count@top\endcsname\relax
+    \tmp@fifo@stack@bottom\csname #1@fifo@stack@count@bottom\endcsname\relax
+    \ifnum\tmp@fifo@stack@top<\tmp@fifo@stack@bottom\relax\else
+      \expandafter\global\expandafter\let
+        \csname #1@\fifo@stack@pointer\tmp@fifo@stack@top\endcsname=
+          \fifo@stack@never@defined\relax
+      \advance\tmp@fifo@stack@top by -1\relax
+      \expandafter\xdef\csname #1@fifo@stack@count@top\endcsname
+        {\the\tmp@fifo@stack@top}%
+      \tmp@fifo@stack@size\csname #1@fifo@stack@count@size\endcsname\relax
+      \global\advance\tmp@fifo@stack@size by -1\relax
+      \expandafter\xdef\csname #1@fifo@stack@count@size\endcsname
+        {\the\tmp@fifo@stack@size}%
+    \fi
+  \fi
+}
+\newcommand\FSShowTop[1]{%
+  {\edef\fifo@stack@top{\FSTop{#1}}%
+   \typeout{The top of #1: \fifo@stack@top}}}
+\newcommand\FSBottom[1]{%
+  \ifx\csname #1@fifo@stack@count@bottom\endcsname\relax
+    \PackageError{fifo-stack}{Undefined FIFO/stack #1}%
+      {You should first create the FIFO/stack with \FSCreate}%
+  \else
+    \csname fifo@stack@bottom@#1\endcsname
+  \fi
+}
+\newcommand\FSUnshift[2]{%
+  \ifx\csname #1@fifo@stack@count@bottom\endcsname\relax
+    \PackageError{fifo-stack}{Undefined FIFO/stack #1}%
+      {You should first create the FIFO/stack with \FSCreate}%
+  \else
+    \edef\fifo@stack@newBottom{#2}%
+    \tmp@fifo@stack@bottom\csname #1@fifo@stack@count@bottom\endcsname\relax
+    \global\advance\tmp@fifo@stack@bottom by -1\relax
+    \expandafter\xdef\csname #1@fifo@stack@count@bottom\endcsname
+      {\the\tmp@fifo@stack@bottom}%
+    \tmp@fifo@stack@size\csname #1@fifo@stack@count@size\endcsname\relax
+    \global\advance\tmp@fifo@stack@size by 1\relax
+    \expandafter\xdef\csname #1@fifo@stack@count@size\endcsname
+      {\the\tmp@fifo@stack@size}%
+    \expandafter\xdef\csname #1@\fifo@stack@pointer\tmp@fifo@stack@bottom\endcsname
+      {\fifo@stack@newBottom}%
+  \fi
+}
+\newcommand\FSShift[1]{%
+  \ifx\csname #1@fifo@stack@count@bottom\endcsname\relax
+    \PackageError{fifo-stack}{Undefined FIFO/stack #1}%
+      {You should first create the FIFO/stack with \FSCreate}%
+  \else
+    \tmp@fifo@stack@top\csname #1@fifo@stack@count@top\endcsname\relax
+    \tmp@fifo@stack@bottom\csname #1@fifo@stack@count@bottom\endcsname\relax
+    \ifnum\tmp@fifo@stack@top<\tmp@fifo@stack@bottom\relax\else
+      \expandafter\global\expandafter\let
+        \csname #1@\fifo@stack@pointer\tmp@fifo@stack@bottom\endcsname=
+          \fifo@stack@never@defined\relax
+      \advance\tmp@fifo@stack@bottom by 1\relax
+      \expandafter\xdef\csname #1@fifo@stack@count@bottom\endcsname
+        {\the\tmp@fifo@stack@bottom}%
+      \tmp@fifo@stack@size\csname #1@fifo@stack@count@size\endcsname\relax
+      \global\advance\tmp@fifo@stack@size by -1\relax
+      \expandafter\xdef\csname #1@fifo@stack@count@size\endcsname
+        {\the\tmp@fifo@stack@size}%
+    \fi
+  \fi
+}
+\newcommand\FSShowBottom[1]{%
+  {\edef\fifo@stack@bottom{\FSBottom{#1}}%
+   \typeout{The bottom of #1: \fifo@stack@bottom}}}
+\newcommand\FSSize[1]{\csname #1@fifo@stack@count@size\endcsname}
+\endinput
+%%
+%% End of file `fifo-stack.sty'.
diff --git a/Master/tlpkg/bin/tlpkg-ctan-check b/Master/tlpkg/bin/tlpkg-ctan-check
index 09e2399d2f4..d1d68d141ca 100755
--- a/Master/tlpkg/bin/tlpkg-ctan-check
+++ b/Master/tlpkg/bin/tlpkg-ctan-check
@@ -193,7 +193,7 @@ my @TLP_working = qw(
     FAQ-en fast-diagram fbb fbithesis fbs
     fc fcltxdoc fdsymbol featpost fenixpar
     fetamont feupphdteses feyn feynmf feynmp-auto fge
-    fifinddo-info fig4latex figbas figbib figflow figsize
+    fifinddo-info fifo-stack fig4latex figbas figbib figflow figsize
     filecontents filedate filehook fileinfo filemod
     findhyph fink finstrut fira first-latex-doc
     fix2col fixfoot fixlatvian fixltxhyph fixme fixmetodonotes fixpdfmag
diff --git a/Master/tlpkg/tlpsrc/collection-latexextra.tlpsrc b/Master/tlpkg/tlpsrc/collection-latexextra.tlpsrc
index ad6b4c9328f..f6e4932619e 100644
--- a/Master/tlpkg/tlpsrc/collection-latexextra.tlpsrc
+++ b/Master/tlpkg/tlpsrc/collection-latexextra.tlpsrc
@@ -284,6 +284,7 @@ depend fancynum
 depend fancypar
 depend fancytabs
 depend fancytooltips
+depend fifo-stack
 depend figsize
 depend filecontents
 depend filedate
diff --git a/Master/tlpkg/tlpsrc/fifo-stack.tlpsrc b/Master/tlpkg/tlpsrc/fifo-stack.tlpsrc
new file mode 100644
index 00000000000..e69de29bb2d
--- /dev/null
+++ b/Master/tlpkg/tlpsrc/fifo-stack.tlpsrc