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Source: xint.dtx 1.3c 2018/06/17 (doc 2018/06/17)
Author: Jean-Francois Burnol
Info: Expandable operations on big integers, decimals, fractions
License: LPPL 1.3c
This README is also available as README.pdf and README.html.
Change log is to be found in CHANGES.pdf or CHANGES.html.
The user manual is xint.pdf, and the commented source code is available
as sourcexint.pdf.
AIM
The basic aim is provide _expandable_ computations on integers,
fractions, and floating point numbers. For example
\xinttheexpr reduce(37189719/183618963+11390170/17310720)^17\relax
will evaluate exactly the fraction; the result has 462 characters
(including the fraction slash.) One can also work with dummy variables:
\xinttheexpr mul(add(x(x+1)(x+2), x=y..y+15), y=171286,98762,9296)\relax
evaluates to 15979066346135829902328007959448563667099190784.
Float computations are possible at an adjustable precision (default 16).
\xintDigits:=48;\xintthefloatexpr 123_456_789^1_000.5\relax
->3.63692761822782679930738270515740797370813691938e8095
(as this example shows the underscore character can be used to separate
visually digits, one can also use the space character for that purpose).
Currently, only integer and half-integer exponents are allowed for the
power operation in expressions and only the square-root operation is
implemented besides the four arithmetic operations. Square-root and the
four operations achieve correct rounding in the given arbitrary
precision.
USAGE
It is possible to use the package with Plain (using for example
\input xintexpr.sty) or with LaTeX (\usepackage{xintexpr}).
With LaTeX
\usepackage{xint} % expandable arithmetic with big integers
\usepackage{xintfrac} % decimal numbers, fractions, floats
\usepackage{xinttools} % expandable and non expandable loops
\usepackage{xintexpr} % expressions with infix operators
Further packages: xintbinhex, xintgcd, xintseries and xintcfrac.
Main dependencies are handled automatically. For example xintexpr
automatically loads xinttools and xintfrac (which itself loads xint).
But the gcd()/lcm() functions require extra loading of xintgcd and
hexadecimal input requires xintbinhex.
Package xintcore is the subset of xint providing only the five
operations on big integers: \xintiiAdd, \xintiiMul, ...
The LaTeX package bnumexpr defines a more light-weight parser of
arithmetical expressions using big integers, which supports only the
four operations, the modulo operation, the power operation, and the
factorial. By default it uses the macros from xintcore but this can be
customized.
With TeX
One does for example:
\input xintexpr.sty
The packages may be loaded in any catcode context such that letters,
digits, \ and % have their standard catcodes.
xintcore.sty and xinttools.sty both import xintkernel.sty which has the
catcode handler and package identifier and defines a few utilities such
as \oodef/\fdef, \xint_dothis/\xint_orthat, or \xintLength.
Since 1.3b, xintkernel.sty also provides \xintUniformDeviate which is a
wrapper of the engine \pdfuniformdeviate or \uniformdeviate done to
guarantee more uniformity of the pseudo-random integers. This is used by
xintexpr.sty for implementing random() and randrange() functions.
INSTALLATION
Method A: using the package manager of your TeX distribution
xint is included in TeXLive (hence also MacTeX) and MikTeX.
There can be a few days of delay between apparition of a new version on
CTAN and availability via the distribution package manager.
Method B: manual installation using xint.tds.zip and unzip
Assumes a GNU/Linux-like system (or Mac OS X).
1. obtain xint.tds.zip from CTAN:
http://mirror.ctan.org/install/macros/generic/xint.tds.zip
2. cd to the download repertory and issue:
unzip xint.tds.zip -d <TEXMF>
where <TEXMF> is a suitable TDS-compliant destination repertory. For
example, with TeXLive:
- Linux, standard access rights, hence sudo is needed,
installation into the "local" tree:
sudo unzip xint.tds.zip -d /usr/local/texlive/texmf-local
sudo texhash /usr/local/texlive/texmf-local
- Mac OS X, installation into user home folder (no sudo needed,
and it is recommended to not have a ls-R file there, hence no
texhash):
unzip xint.tds.zip -d ~/Library/texmf
Method C: manual installation using Makefile and xint.dtx
The Makefile automatizes rebuilding from xint.dtx all documentation
files as well as xint.tds.zip. It is for GNU/Linux-like (inc. Mac OS X)
systems, with a teTeX like installation such as TeXLive. The Latexmk and
Pandoc softwares are required to build all the documentation.
1. obtain xint.dtx and Makefile from
http://mirror.ctan.org/macros/generic/xint.
2. put them in an otherwise empty working repertory, run make or
equivalently make help for further instructions.
Method D: installation starting with only xint.dtx
Run etex xint.dtx to extract from xint.dtx all macro files as well as
auxiliary files needed for building the documentation. Among them there
is Makefile.mk. If you are on a GNU/Linux-type system, rename the file
to Makefile and execute make on command line for further help. If not,
you will need to examine the contents of this file to see the commands
needed to produce the documentation with latexmk (extraction will have
created a configuration file .latexmkrc) and pandoc. If not using
latexmk, you will need to execute suitable makeindex -s xint-gind.ist
calls to produce the indices of macros for inclusion into
sourcexint.pdf. It is also possible to get xint.pdf to include the
source code. For this, see the instructions in xint.tex.
Finishing the installation in a TDS hierarchy:
- move the style files to TDS:tex/generic/xint/
- xint.dtx goes to TDS:source/generic/xint/
- The documentation (xint.pdf, README.md,...) goes to
TDS:doc/generic/xint/
Depending on the destination, it may then be necessary to refresh a
filename database.
LICENSE
Copyright (C) 2013-2018 by Jean-Francois Burnol
This Work may be distributed and/or modified under the conditions of the
LaTeX Project Public License version 1.3c. This version of this license
is in
http://www.latex-project.org/lppl/lppl-1-3c.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 author-maintained.
The Author of this Work is Jean-Francois Burnol.
This Work consists of the source file xint.dtx and of its derived files:
xintkernel.sty, xintcore.sty, xint.sty, xintfrac.sty, xintexpr.sty,
xintbinhex.sty, xintgcd.sty, xintseries.sty, xintcfrac.sty,
xinttools.sty, xint.ins, xint.tex, README, README.md, README.html,
README.pdf, CHANGES.md, CHANGES.html, CHANGES.pdf, pandoctpl.latex,
doHTMLs.sh, doPDFs.sh, xint.dvi, xint.pdf, Makefile.mk, xint-gind.ist,
and .latexmkrc.
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