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ficl
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<br><p>
<a href=index.html><font face=arial,helvetica color=white><b>Index</b></font></a><p>
<p><br>
<a href=dpans.html><font face=arial,helvetica color=white><b>ANS</b></font></a><br>
<a href=api.html><font face=arial,helvetica color=white><b>API</b></font></a><br>
<a href=debugger.html><font face=arial,helvetica color=white><b>Debugger</b></font></a><br>
<a href=http://sourceforge.net/project/showfiles.php?group_id=24441><font face=arial,helvetica color=white><b>Download</b></font></a><br>
<a href=license.html><font face=arial,helvetica color=white><b>Licensing</b></font></a><br>
<a href=links.html><font face=arial,helvetica color=white><b>Links</b></font></a><br>
<a href=locals.html><font face=arial,helvetica color=white><b>Locals</b></font></a><br>
<a href=oop.html><font face=arial,helvetica color=white><b>OOP In Ficl</b></font></a><br>
<a href=parsesteps.html><font face=arial,helvetica color=white><b>Parse Steps</b></font></a><br>
<a href=releases.html><font face=arial,helvetica color=white><b>Release History</b></font></a><br>
<a href=upgrading.html><font face=arial,helvetica color=white><b>Upgrading To 4.0</b></font></a><br>
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<font face=arial,helvetica color=#004968 size=5><b><i>
<a name='WhatisFicl'>
What is Ficl?
</a></i></b></font></td></tr></table><p><blockquote>
Ficl is a programming language interpreter designed to be embedded
into other systems as a command, macro, and development prototyping
language.
<p>
Ficl is an acronym for "Forth Inspired Command Language".
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<font face=arial,helvetica color=#004968 size=5><b><i>
<a name='FiclFeatures'>
Ficl Features
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<dl>
<p><dt>
Ficl is <b><i>easy to port.</i></b>
<dd>
<ul>
<li>
It typically takes under 2 hours to port to a new platform.
<li>
Ficl is written in strict ANSI C.
<li>
Ficl can run natively on 32- and 64-bit processors.
</ul>
<p><dt>
Ficl has a <b><i>small memory footprint.</i></b>
<dd>
A fully featured Win32 console version takes less than 100K
of memory, and a minimal version is less
than half that.
<p><dt>
Ficl is <b><i>easy to integrate</i></b> into your program.
<dd>
Where most Forths view themselves as the center of the system and
expect the rest of the system to be coded in Forth, Ficl acts as a
component of your program. It is easy to export code written in C or
ASM to Ficl (in the style of TCL), or to invoke Ficl code from a
compiled module.
<p><dt>
Ficl is <b><i>fast.</i></b>
<dd>
Thanks to its
<a href=http://www.complang.tuwien.ac.at/forth/threaded-code.html#switch-threading>"switch-threaded"</a>
virtual machine design, Ficl 4 is faster than ever—about 3x the speed of Ficl 3.
Ficl also features blindingly fast "just in time" compiling, removing the "compile" step from
the usual compile-debug-edit iterative debugging cycle.
<p><dt>
Ficl is a <b><i>complete and powerful programming language.</i></b>
<dd>
Ficl is an implementation of the FORTH language, a language providing
a wide range of standard programming language features:
<ul>
<li>
Integer and floating-point numbers, with a rich set of operators.
<li>
Arrays.
<li>
File I/O.
<li>
Flow control (<code>if/then/else</code> and many looping structures).
<li>
Subroutines with named arguments.
<li>
Language extensibility.
<li>
Powerful code pre-processing features.
</ul>
<p><dt>
Ficl is <b><i>standards-compliant.</i></b>
<dd>
Ficl conforms to the 1994 ANSI Standard for FORTH (DPANS94).
See <a href=dpans.html>ANS Required Information</a> for
more detail.
<p><dt>
Ficl is <b><i>extensible.</i></b>
<dd>
Ficl is extensible both at compile-time and at run-time.
You can add new script functions, new native functions,
even new control structures.
<p><dt>
Ficl adds <b><i>object oriented programming features.</i></b>
<dd>
Ficl's flexible OOP library can be used to wrap
data structures or classes of the host system without altering them.
(And remember how we said Ficl was extensible? Ficl's object-oriented
programming extensions are written in Ficl.)
<p><dt>
Ficl is <b><i>interactive.</i></b>
<dd>
Ficl can be used interactively, like most other FORTHs, Python,
and Smalltalk. You can inspect data, run commands, or even
define new commands, all on a running Ficl VM.
Ficl also has a built-in script debugger that allows you to
step through Ficl code as it is executed.
<p><dt>
Ficl is <b><i>ROMable.</i></b>
<dd>
Ficl is designed to work in RAM based and ROM code / RAM
data environments.
<p><dt>
Ficl is <b><i>safe for multithreaded programs.</i></b>
<dd>
Ficl is reentrant and thread-safe. After initialization,
it does not write to any global data.
<p><dt>
Ficl is <b><i>open-source and free.</i></b>
<dd>
The <a href=license.html>Ficl licence</a> is a BSD-style
license, requiring only that you document that you are
using Ficl. There are no licensing costs for using Ficl.
</dl>
<a name=whatsnew>
<p>
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<font face=arial,helvetica color=#004968 size=5><b><i>
<a name='WhatsNewInFicl40'>
What's New In Ficl 4.0?
</a></i></b></font></td></tr></table><p><blockquote>
</a>
Ficl 4.0 is a major change for Ficl. Ficl 4.0 is <i>smaller</i>,
<i>faster</i>, <i>more powerful</i>, and <i>easier to use</i>
than ever before. (Or your money back!)
<p>
Ficl 4.0 features a major engine rewrite. Previous versions
of Ficl stored compiled words as an array of pointers to data
structure; Ficl 4.0 adds "instructions", and changes over to
mostly using a "switch-threaded" model. The result? Ficl 4.0
is approximately <i>three times</i> as fast as Ficl 3.03.
<p>
Ficl 4.0 also adds the ability to store the "softcore" words
as LZ77 compressed text. Decompression is so quick as to be
nearly unmeasurable (0.00384 seconds on a 750MHz AMD Duron-based
machine). And even with the runtime decompressor, the resulting
Ficl executable is over 13k smaller!
<p>
Another new feature: Ficl 4.0 can take advantage of native
support for double-word math. If your platform supports it,
set the preprocessor symbol <code>FICL_HAVE_NATIVE_2INTEGER</code>
to 1, and create <code>typedefs</code> for <code>ficl2Integer</code>
and <code>ficl2Unsigned</code>.
<p>
Ficl 4.0 also features a retooled API, and a redesigned directory
tree. The API is now far more consistent. But for those of you
who are upgrading from Ficl 3.03 or before, you can enable API
backwards compatibility by turning on the compile-time flag
<code>FICL_WANT_COMPATIBILITY</code>.
<p>
Ficl 4.0 also extends support every kind of local and
global value imaginable. Every values can individually
be local or global, single-cell or double-cell, and
integer or floating-point.
And <code>TO</code> <i>always</i> does the right thing.
<p>
If you're using Ficl under Windows, you'll be happy
to know that there's a brand-new build process.
The Ficl build process now builds Ficl as
<ul>
<li>
a static library (.LIB),
<li>
a dynamic library (.DLL, with a .LIB import library), and
<li>
a standalone executable (.EXE).
</ul>
Furthermore, each of these targets can be built in
Debug or Release, Singlethreaded or Multithreaded,
and optionally using the DLL version of the C runtime
library for Multithreaded builds. (And, plus, the
<code>/objects/common</code> nonsense is gone!)
<p>
Finally, Ficl 4.0 adds a <code>contrib</code>
directory, a repository for user-contributed code that isn't
part of the standard Ficl release. The only package there
right now is <b>XClasses</b>, a Python-based IDL that generates
the definition files for C++-based classes, the equivalent Ficl
classes, and code to allow the Ficl classes to call the C++ methods.
Using <b>XClasses</b> you can write your class once, and use it
immediately from both C++ and Ficl.
<p>
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<a name='GettingFicl'>
Getting Ficl
</a></i></b></font></td></tr></table><p><blockquote>
You can download Ficl from the
<a href=http://sourceforge.net/project/showfiles.php?group_id=24441>
Ficl download page at Sourceforge</a>.
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