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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<HEAD>
<TITLE>clig --- Command Line Interpreter Generator</TITLE>
<!-- $Revsion$, $Date: 2001/01/21 15:06:08 $ -->
</HEAD>
<BODY>
<H1>clig --- Command Line Interpreter Generator</H1>
<h3>For the impatient and those who know</h3>
<p>You can download the <a href="./clig.ps.gz">gzipped PostScript
documentation</a> or the latest release as <a
href="./clig-|VERSION|.tar.gz">clig-|VERSION|.tar.gz</a> or as <a
href="./clig-|VERSION|-0.noarch.rpm">clig-|VERSION|-0.noarch.rpm</a>,
which includes the documentation.
<p>If you know <code>clig</code> already, you may be interested in the
<a href="CHANGES">changes</a> since the last release.
<p>You can also download <a href="./dir.ttml">older versions</a> of clig.
<hr width=50 align=left>
<blockquote>
Remark: <b>clig is not CLIG</b>. If you were looking for the
<em>Clig Grapher for linguistic data structures</em> by Karsten
Konrad, you should go to the
<a href="http://www.ags.uni-sb.de/~konrad/clig.html">
CLIG homepage
</a>. Both tools don't have anything to do with each other. They share
their names only due to a historical coincidence.
</blockquote>
<hr width=50 align=left>
<h3>What is clig?</h3>
<p>Clig creates for your C-Program or lets you use in your
Tcl-script
<ul>
<li>a command line interpreter with those features:
<ul>
<li>Flag, Int, Long, Float, Double or String options
<li>no. of parameters of options can be specified
<li>a range can be specified for the numerical options
<li>options can have defaults
<li>options can be mandatory (not really optional then :-)
</ul>
The command line interpreter will check for your C-program
or Tcl-script the existence of mandatory options, correct
range of numerical option arguments and correct number of
arguments. Violation results in readable error messages.
Parsed results are delivered to your C-program in a
custum-built structure or as directly accessible variables
to your Tcl-script.
<li>a readable, up-to-date usage-message
<li>a basic manual page
</ul>
<p>Clig takes as input a simple description file.
<p>Clig generates standard C (well, I tried as hard as I can :-)
It is reported to work well with C++. Within a Tcl-script, code
generation is not necessary. Just declare your command line
arguments and then run the parser.
<p>The resulting code is self contained and does not depend on a
library (except for libc, of course).
<p>Clig is written in Tcl
<p>Clig is free software. Its licence is the GPL.
<h3>An Example</h3>
Consider the following specification:
<LISTING>
Int -rgb rgb \
"specifies a color by its red, green and blue components"\
-c 3 3 \
-r 0 255
</LISTING>
It shows most of the features available in <code>clig</code>. Here an
option <code>-rgb</code> is declared with parameters of type
<code>int</code>. Within the C-program or Tcl-script, it will be called
<code>rgb</code>. The next line contains in quotes a usage string to
be displayed by the generated <code>usage()</code>-function. The line
<code>-c 3 3</code> specifies that the option <code>-rgb</code>
must be followed by at least 3 but no more than three (i.e. exactly 3)
integer values. Finally the allowed
range for the three values is specified.
<p>
An <a href="./cmdline.cli">example</a> demonstrating most features of clig is also available.
<p>
Currently, <code>clig</code> understands the following option types:
<dl>
<dt> <CODE>Flag</CODE>
<dd> is a boolean option (or flag) without parameters.
<dt> <code>Float</code>
<dd> is an option with zero or more floating point parameters.
<dt> <code>Double</code>
<dd> is an option with zero or more <code>double</code> parameters.
<dt> <code>Int</code>
<dd> accepts zero or more int parameters.
<dt> <code>Long</code>
<dd> accepts zero or more long (i.e. 8 byte int on some machines) parameters.
<dt> <code>String</code>
<dd> allows arbitrary strings as parameters.
</dl>
For floating point, integer and string valued options a range can be
specified for the number of allowed parameters. The allowed range for
floating point and integer option values can also be specified.
<p>
<h3>Features missing on my todo-list</h3>
<ul>
<li> neural net type command line parser,
<li> fuzzy logic command line parser,
<li> inheritance hierarchy for command line options,
<li> visual basic support,
<li> command lines shorter than 128 characters,
<li> generation of WINDOS program group,
<li> Ole, Nils or Jens support,
<li> InactiveX-aware buzzword-recognition.
</ul>
<h3>Requirements</h3>
<code>Clig</code> is implemented in Tcl and you will not be able to
make it work without. The generated C-code is Tcl-free.
<hr>
Please send comments and suggestions to
<a href="mailto:kirschh@lionbioscience.com">Harald Kirsch</a>. Flames expressing
the opinion that <code>getopt()</code> is the only way to go are
silently ignored.
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