From: Skip Tavakkolian <fariborz.t@gmail.com>
To: arnold@skeeve.com
Cc: tuhs@tuhs.org
Subject: Re: [TUHS] struct(1) revived! And a request for help
Date: Thu, 13 Jan 2022 14:21:33 -0800 [thread overview]
Message-ID: <CAA1C+h2U1GGANDECx=VBbh4JM0XEE4ScdqC3T0ENyionC1sXNw@mail.gmail.com> (raw)
In-Reply-To: <202201121258.20CCwPEF013323@freefriends.org>
On Wed, Jan 12, 2022 at 4:59 AM <arnold@skeeve.com> wrote:
>
> Hello All.
>
> We recently discussed Brenda Baker's struct program, that read Fortran
> and generated Ratfor. Many of us remarked as to what a really cool
> program it was and how much we admired it, myself included.
>
> For fun (for some definition of "fun") I decided to try to bring the code
> into the present. I set up a GitHub repo with the V7, V8 and V10 code,
> and then started work in a separate branch.
>
> (https://github.com/arnoldrobbins/struct, branch "modernize".)
>
> The program has three main parts:
>
> - structure, which reads Fortran and outputs something that is
> almost Ratfor on standard output.
>
> - beautify, which reads the output of structure and finishes the job,
> primarily making conditions readable (.not. --> !, removing double
> negatives, etc.)
>
> - struct.sh - a simple shell script that runs the above two components.
> This is what the user invokes.
>
> The code was written in 1974. As such, it is rife with "type punning"
> between int, int *, int **, and char *. These produce a lot of warnings
> from a modern day C compiler. The code also uses a, er, "unique" bracing
> style, making it nearly illegible to my stuck-in-a-rut programming brain.
That is the same style that P.J. Plauger/Whitesmiths used in Idris OS. The brace
indentation levels also match the Ratfor code in Software Tools.
>
> Here is what I've accomplished so far:
>
> * Converted every function definition and declaration to use modern (ANSI)
> C style, adding a header file with function declarations that is
> included everywhere.
>
> * Run all the code through the indent program, formatting it as traditional
> K&R bracing style, with tabs.
>
> * Fixed some macros to use modern style for getting parameter values as strings
> into the macros.
>
> * Fixed a few small bugs here and there.
>
> * Fixed beautify to work with modern byacc/bison (%union) and to work with
> flex instead of lex. This latter was a challenge.
>
> In structure, only three files still generate warnings, but they all relate
> to integer <--> pointer assignment / use as. However, when compiled in
> 32 bit mode (gcc -m32), where sizeof(int) is the same as sizeof(pointer),
> despite the warnings, structure works!!
>
> Beautify works, whether compiled in 32 or 64 bit mode.
>
> What I've done so far has been mostly mechanical. I hereby request help from
> anyone who's interested in making progress on "the hard part" --- those three
> files that still generate warnings.
>
> I think the right way to go is to replace int's with a union that holds and
> int, a char* and an int*. But I have not had the quiet time to dive into
> the code to see if this can be done.
>
> Anyone who has some time to devote to this and is interested, please drop
> me a note off-list.
>
> Thanks,
>
> Arnold Robbins
prev parent reply other threads:[~2022-01-13 22:22 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-12 12:58 arnold
2022-01-13 4:23 ` [TUHS] Fwd: " Douglas McIlroy
2022-01-13 6:30 ` [TUHS] " Rich Morin
2022-01-13 15:19 ` [TUHS] Fwd: " arnold
2022-01-13 22:21 ` Skip Tavakkolian [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='CAA1C+h2U1GGANDECx=VBbh4JM0XEE4ScdqC3T0ENyionC1sXNw@mail.gmail.com' \
--to=fariborz.t@gmail.com \
--cc=arnold@skeeve.com \
--cc=tuhs@tuhs.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).