A S-Lang module is defined to be a shared object, usually written in C, that is dynamically linked into a S-Lang application during runtime via the S-Lang import statement. Such modules are useful because they allow S-Lang intrinsics and variables to be shared between applications that support dynamic linking. See http://space.mit.edu/cxc/software/slang/modules/, which provides useful guidelines for the creation of modules, a longer essay on why modules are considered useful, and links to additional modules.

There are a growing number of modules for the S-Lang interpreter. Here are some listed by functionality.

curl

The cURL provides a powerful but simple to use interface to a variety of internet communication protocols.

serial

A module that provides access to the serial port. Available from http://laurent.perez2.free.fr/comp/slang/modules/modules.html.

sldtdi

A module to talk to FTDI USB chips using libftdi. Available from http://laurent.perez2.free.fr/comp/slang/modules/modules.html.

socket

This module provides an interface to the socket library. It is part of the S-Lang distribution.

xpa

Provides XPA interprocess communication with SAOds9 controller. Available from http://space.mit.edu/cxc/software/slang/modules/xpa/.

json

Read write json formatted files. It is part of the S-Lang distribution.

netcdf

This module adds support for reading and writing netCDF files to the interpreter. Available from https://www.jedsoft.org/snapshots/.

cfitsio

This module makes use of the cfitsio library to read and write FITS files. Available from http://space.mit.edu/cxc/software/slang/modules/cfitsio/.

csv

A module that reads/writes CSV (comma separated values) and TAB delimited files. It is part of the S-Lang distribution.

mysqlclient

A mysql client module. Available from https://bitbucket.org/pboekholt/mysqlclient.

slexpat

An XML parsing module. Available from https://bitbucket.org/pboekholt/slexpat.

slgdbm

This module provides access to gdbm databases. Available from https://bitbucket.org/pboekholt/slgdbm.

slhf

This module allows one to read/write HDF5 files. Available from http://space.mit.edu/cxc/software/slang/modules/slh5/.

slsqlite

This module wraps the sqlite3 database library. Available from https://www.jedsoft.org/snapshots/.

sltdb

This module provides access to TDB databases. Available from https://bitbucket.org/pboekholt/sltdb.

pvm

This module makes use of the the Parallel Virtual Machine library to distribute calculates across a network. See http://space.mit.edu/cxc/software/slang/modules/pvm/ for more information.

grace

This modules makes use of the popular Grace plotting program. See the Grace Plotting Module page for more information.

gtk

This module provides access to the GIMP Tool kit. Available from http://space.mit.edu/~mnoble/slgtk/.

histogram

Images can be thought of as 2d histograms. For example, a CCD camera produces an image by histogramming the charge released when photons interact with the CCD. Available from http://space.mit.edu/cxc/software/slang/modules/hist/.

png

This is a module that makes use of libpng to provide functions for reading and writing PNG files. It is part of the S-Lang distribution.

slgtkdatabox

Bindings for GtkDatabox, a Gtk widget for data plotting. Available from http://laurent.perez2.free.fr/comp/slang/modules/modules.html.

SLxfig

SLxfig is a package that makes use of fig2dev (an xfig utility) to produce publication quality plots. It provides a contour module.

volview

A 3d volume visualization module. Available from http://space.mit.edu/cxc/software/slang/modules/volview/

voronoi

A voronoi tesselation module. Available from https://www.jedsoft.org/snapshots/

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gsl

This module wraps the GNU Scientific Library to provide vectorized access to special functions, random numbers, FFTs, etc. Available from http://space.mit.edu/cxc/software/slang/modules/gsl/.

histogram

This is an extremely useful module for anyone analysing data. It creates various types of one and two dimensional histograms. It is part of the S-Lang distribution.

rand

A random number/distribution module. It is part of the S-Lang distribution.

stats

This is a statistics module that provides various statistical tests (Kolmogorov-Smirnov, Mann-Whitney, Student, Kuiper, ...) and probability functions. It is part of the S-Lang distribution.

onig

This module provides an interface to the Oniguruma regular expression library. It is part of the S-Lang distribution.

pcre

This is a module that interfaces to the Perl Compatible Regular Expression library. It is part of the S-Lang distribution.

slwildcard

This module provides vectorized pattern matching. Available from https://bitbucket.org/pboekholt/slwildcard.

fcntl

This module contains several functions to to allow an interpreter to manipulate file descriptors via the C fcntl function. It is part of the S-Lang distribution.

ioctl

A module that wraps the IOCTL system call. Available from http://laurent.perez2.free.fr/comp/slang/modules/modules.html.

select

A module implementing an interface to the "select" system call. It is part of the S-Lang distribution.

sysconf

A module that interfaces to the POSIX sysconf and pathconf functions. It is part of the S-Lang distribution.

termios

A module that provides access to the various termios functions, e.g., tcsetpgrp, tcflush, etc. It is part of the S-Lang distribution.

base64

A base64 encoder/decoder module. It is part of the S-Lang distribution.

chksum

A module that computes various checksums (MD5, SHA1...). It is part of the S-Lang distribution.

iconv

This module wraps the GNU iconv library. It allows S-Lang scripts to easily perform character set conversions.

slcgi

This module provides bindings to cgilib. Available from https://bitbucket.org/pboekholt/slcgi.

slcrypto

This module wraps some of the OpenSSL EVP library functions. It is available from http://web.science.mq.edu.au/~arikm/code/slcrypto/slcrypto.tar.gz.

slhenke

This module is a high-level interface to the Henke data tables and may be used to compute multilayer reflectivities. See this document for a first principles derivation of electromagnetic reflection from a multilayer.

slgettext

This modules adds gettext internationization. Available from https://bitbucket.org/pboekholt/slgettext.

tess

A regression-testing module. Available from http://space.mit.edu/cxc/software/slang/modules/tess/.

varray

The varray module is simple interface to the mmap system call found on many Unix systems. This module allows one to associate very large arrays with a file on disk. It is part of the S-Lang distribution.

zlib

Ths module wraps the zlib compression library. It is part of the S-Lang distribution.

A number of the external modules are readily available to debian users via the standard apt-get install mechanism. These include:

• slang-cfitsio read and write FITS files
• slang-curl transfer files using HTTP and FTP
• slang-gdbm access to GDBM databases
• slang-gsl GNU Scientific Library binding
• slang-gtk binds the GIMP Toolkit (GTK)
• slang-histogram create and manipulate histograms
• slang-pvm PVM (Parallel Virtual Machine)
• slang-slirp C code generator for modules
• slang-tess regression testing system

Finally, if you want to autogenerate a module, then use the SLIRP code generator to generate the module for you.