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%%
%% 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'.
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