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Re: [Lynx-dev] Developer Documentation

From: Amir Shehzad Malik
Subject: Re: [Lynx-dev] Developer Documentation
Date: Thu, 21 Jun 2007 15:44:56 +0500

thanks again Dickey... It was very helpful to get the basic idea of things' organization... Well I would like to know a few other points... Actually the plateform I want to port it to is pSOS... and the development and build environments are of that from Trimedia....whole thing is called Trimedia... Now what I feel is that I need to concentrate on W3C linbrary... as you mentioned that its where the plateform dependent things really are... Is that right ? The Trimedia system has standard (ANSI C) compiler and build system... Now can you mention a simple sequence of steps that you guess are required to port the code to that.. I mean do I only need to make changes in W3C library things ? The things that I have felt to concentrate on are Socket calls, utility functions like sleep() etc, Threads (and other system calls if there are any).... what do you think. ?
If anyone else can help then please....
Looking for your reply...

Thanks in advance,

From: Thomas Dickey <address@hidden>
To: Amir Shehzad Malik <address@hidden>
CC: address@hidden
Subject: Re: [Lynx-dev] Developer Documentation
Date: Wed, 20 Jun 2007 08:01:41 -0400 (EDT)

On Wed, 20 Jun 2007, Amir Shehzad Malik wrote:

Thanks for your reply.... well yes.. It is to be cross compiled.... Thats
ok but now can you suggest some document to understand the code
organization so I can get going with the code a little faster...

not really. Here's a quick overview. The configure script and makefiles know about 3 directories:


The WWW tree was originally the w3c library. That's where the networking is done, the SGML parsing done. Over in src are the HTML parsing (on top of the SGML) and the layout onto the screen. src/chrtrans builds the compiled-in character-set tables used to make approximations to different types of display. Many of the localized messages are defined in the
top-level LYMessages_en.h

The configure script (--help) and INSTALLATION files document lynx from the standpoint of building and installing. For _modifying_ the code, there's no concise description. When I'm making changes to it, having a general sense of where things are helps. Also, running "lynx -trace" logs a lot of information to $HOME/Lynx.trace (and grep'ing for strings from the trace file does help find things).

I'd expect you'll make changes to accommodate networking quirks, e.g,
in WWW/Library/Implementation/www_tcp.h (which, along with HTUtils.h) is one of the principal places that platform-tweaks are made. The ones that can be derived from a configure-script check are of course made there...


From:  Thomas Dickey <address@hidden>
To:  Malik Aamir Shehzad <address@hidden>
CC:  address@hidden
Subject:  Re: [Lynx-dev] Developer Documentation
Date:  Wed, 20 Jun 2007 07:40:03 -0400 (EDT)
>On Wed, 20 Jun 2007, Malik Aamir Shehzad wrote:
>>Hi .... I am working on a project to port Lynx to Trimedia (an
>>embedded system plateform).... I am complete beginner with
>>I have its code and now I want to know how and where should I
>>to understand the code.. Can I get some help regarding this or
>>I obtain developer documentation from somewhere?
>The files in the source-tree are about all the documentation that
>Since it's an embedded system, I'd assume you're going to
>Lynx's configure script might work for that - I made some changes
>years ago to allow the utility in src/chrtrans to be built/run
>build-machine's compiler, but don't have a cross-development
>environment that can build the whole application.  (I did some of
>this using a djgpp cross-compiler that is able to build ncurses).
>Besides lynx, you'll need something like ncurses (even slang).
>Best thing to do is to build a copy on a machine that's easy to
>build on, i.e., no cross-compiling, and see what the pieces are.
>Thomas E. Dickey
>Lynx-dev mailing list

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