OpenEuphoria

• Posted by Nov 06, 2007
• 1781 views

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Date: Mon, 5 Nov 2007 20:47:58 -0700
From: "codepilot Gmail Account" <codepilot at gmail.com>
To: EUforum at topica.com
Subject: Re: C to EU Translator
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I'll look at the stucture thing more, and also see how involved a complete C
processor would be.
Daniel


On 11/4/07, Chris Bensler <guest at rapideuphoria.com> wrote:
>
> ============ The Euphoria Mailing List ============
>
>
> posted by: Chris Bensler <eu at creativep?rta?.ca>
>
> codepilot Gmail Account wrote:
> >
> > Hmm. Maybe I should make it do macros and structures? Good idea! I have
> > already done COM. I know that macros can do a lot of things, should they
> > turn into functions? At some point a full blown C to Euphoria translator
> > needs to be made, because made H files have things that aren't as cut
> and
> > dry as a simple specification of call point entries/types/constants.
> Many of
> > the macros do a lot of work precompile that would make much sense in run
> > time, in euphoria as functions. And I really can't think of a good way
> to do
> > structures, maybe some ideas would be good.
>
> In previous attempts at making a C2EU translator, I aimed for a hybrid
> system involving several steps. Something like Auto->Manual->Auto->Manual.
> All in all I thought it was quite successful, but the process was still
> fairly labour intensive. Eg. All macros that were determined not to be
> constant values, were simply output as commented code. There were also
> portions of code that I didn't know how to handle correctly at the time or
> the translator was too dumb to handle, so I made a line matching cache,
> which the user would be prompted to manually convert a given line and the
> two would would then be stored in the cache file for later uses, without
> having to re-enter that line conversion again.
>
> This system had a few main drawbacks though. Mainly it only produced a
> single state of the api. Eg. Win98 and Ansi
> Producing another state would require going through the entire process
> again and having multiple versions of the API to deal with.
>
> It's been a while since I was working on it, but IIRC, there is 3 basic
> types of macros: constants, functions, and fragments
> Constants are fairly easy to determine, but to be able to identify
> functions from fragments, the translator must be capable of validating the C
> code as being self contained. Essentially this means that the translator
> must be capable of processing C code 100%.
>
> Structures are fairly difficult to process from the C code as well. It
> requires a fairly complete processor to be able to handle all possible
> occurances. For conversion to Euphoria, there is various methods that could
> be used for the generated structures. Win32lib uses it's own system of
> store/fetch I beleive. I think Bernie Ryan created a structure library made
> of machine code. And I wrote a structure emulation library.
>
> Chris Bensler
> Code is Alchemy


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