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<TITLE>3.1 History of FunnelWeb Implementations</TITLE>
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<P><FONT SIZE="5">3.1 History of FunnelWeb Implementations</FONT><BR>
<P><BR><FONT SIZE="4"><STRONG>FunnelWeb V1 (1986)</STRONG></FONT><BR>
<P>The first implementation of FunnelWeb was written in
Ada<STRONG>[USDOD83]</STRONG> in December 1986. I used
FunnelWeb as a program to write to help me learn Ada.
FunnelWeb V1 took about one month to write and was fairly
VMS dependent.
<P>I used FunnelWeb V1 to write all the Ada software
for my Ph.D. project and it was very successful in this
role, helping me to document some complicated code. However
when I finished the Ph.D work in July 1989, I lost
access to the VAX and hence to FunnelWeb. During my
candidature, at least twenty thousand lines of code were
written using FunnelWeb, but hardly anyone else used
FunnelWeb. After losing access to Ada and the Vax (and hence
to FunnelWeb), I was forced back to programming the
non-literate way. I recognised a need to translate FunnelWeb
into the more portable C programming language, but didn't
have the time or energy to create one.
<P><BR><FONT SIZE="4"><STRONG>FunnelWeb V2 (1991)</STRONG></FONT><BR>
<P>About this time (late 1989), David
Hulse, at the time a student in
Computer Science at the University of
Adelaide, volunteered to
translate the 4000 line Ada version of FunnelWeb into C.
To my knowledge this translation process took about three
weeks (in December 1989). The result was called
FunnelWeb V2 and was formally signed into the public
domain on 5 May 1992. However, it was never publicly
released.
<P>I would like to take this opportunity to thank David
Hulse for translating FunnelWeb from Ada to C, as this
effort was the basis of later work on FunnelWeb.
<P><BR><FONT SIZE="4"><STRONG>FunnelWeb V3.0 (1992)</STRONG></FONT><BR>
<P>Lack of portability of the translated C code,
combined with the need for a rather solid design review,
combined with the need to strengthen the program to bring it
up to production standard, resulted in my performing a
complete reworking of the code in late 1991 and early 1992.
The C code was entirely, but incrementally, replaced or
reformatted. The code was also strengthened and new features
were added. This process took about two months (November and
December 1991). A further two months (approx) were spent
writing documentation, constructing a regression test suite,
porting the program to different machines, and sorting out
the legal issues involved in its release. FunnelWeb V3.0 was
publicly released on the Internet under a GNU licence
on 6 June 1992.
<P>Version 3.0 proved very solid, but had the following
bugs:
<UL>
<LI> Bombs with an assertion error if the input file
is at least 10000 lines long.
<BR><BR>
<LI> Bombs with an assertion error if it's generating
a listing file and an error occurs on a line longer than 200
characters.
<P>
<FONT SIZE="2"><PRE>
lister.dup: count>=DUPMAX
An assertion has failed! See the line above.
Press return to abort FunnelWeb>
</PRE></FONT>
<BR><BR>
<LI> The FunnelWeb shell <SAMP>diff</SAMP> command bombs
with an assertion error if it can't open the first file:
<P>
<FONT SIZE="2"><PRE>
FunnelWeb>diff deleteme.list vctest01.ans x.x
E: DIFF: Error mapping "deleteme.list".
Error fopen()ing input file
(to determine its length).
do_diff: Image comparison succeeded,
but text comparison failed.
An assertion has failed! See the line above.
Press return to abort FunnelWeb>
</PRE></FONT>
<BR><BR>
<LI> Under VMS FunnelWeb overwrites previous output files
with the newly generated output files, rather than generating a
new version.
<BR><BR>
</UL>
<P><BR><FONT SIZE="4"><STRONG>FunnelWeb V3.1 (1993)</STRONG></FONT><BR>
<P>During 1993, the following changes were made, yielding V3.1:
<PRE>
13-Oct-1993:
lister.c: Increased MAXLINES to one million to
avoid mes_wri case default bomb.
Modified bomb message in mes_wri.
memory.* Modified package to count blocks
of various sizes.
command.c Modified it to call memory to
write out mem report.
13-Oct-1993
parser.c Change ty_name to ty_pname
to save memory.
data.h ?
weave.c ?
</PRE>
<P>These changes essentially fixed the "10,000 lines" bug
and performed some memory tuning.
<P><BR><FONT SIZE="4"><STRONG>FunnelWeb 3.05AC</STRONG></FONT><BR>
<P><A HREF="http://www.theoffice.net/abcoates/" TARGET="_blank">Tony Coates</A> created a
<A HREF="http://www.ems.uq.edu.au:7007/People/Tony/funnelweb.html">FunnelWeb variant</A>
called FunnelWeb V3.05AC that fixes some bugs, and provides some extra
useful features (including HTML output). This version has been officially
classified as an unofficial version.
<P><BR><FONT SIZE="4"><STRONG>FunnelWeb V3.2 (1999)</STRONG></FONT><BR>
<P>In April 1999 I decided to perform extensive housecleaning on
FunnelWeb so as to make it more presentable and useable. This process
involved:
<P>
<UL>
<LI> Eliminating all known bugs.
<LI> Converting all FunnelWeb documentation to webs.
<LI> Porting FunnelWeb to a wider range of platforms.
<LI> Providing FunnelWeb executables online.
<LI> Reworking the main FunnelWeb web.
</UL>
<P>The result was FunnelWeb V3.2.
<P>
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