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RE: [Caml-list] Setting the EOL character....
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Date: -- (:)
From: Richard Lyman <rich@l...>
Subject: Re: [Caml-list] Setting the EOL character....
Ok...

That doesn't look too bad - and I think I almost understand it. : )

... so then - there's no OCaml concept of a global EOL variable, or method
that deals with reading in from a stream until the EOL??

I was hoping more for something along the lines of -

(start pseudocode)

myStream = Unix.accepted_socket_stream
while(true){
    a_line = myStream.read_until("\000")
    deal_with_line(a_line)
}

(end pseudocode)

Thanks for your thoughts!

-Rich


----- Original Message -----
From: "Arturo Borquez" <artboreb@netscape.net>
To: ""Richard Lyman"" <rich@lithinos.com>
Cc: <caml-list@inria.fr>
Sent: Thursday, September 12, 2002 8:24 PM
Subject: RE: [Caml-list] Setting the EOL character....


> "Richard Lyman" <rich@lithinos.com> wrote:
>
> >To start - I really don't know that much about programming (3 years
self-taught in scripted web languages - Perl/PHP/Ruby), and I'm trying to
learn OCaml...
> >
> >I've mostly dealt with persistent socket servers in other programming
languages, and I'd like to write one in OCaml.
> >
> >I've read most of the book - Developing Applications with Objective Caml
(English PDF), so I understand a little - but I'm still very unsure of
myself.
> >
> >Here's the problem I'm trying to solve...
> >
> >I have a proprietary format I'm trying to read in through a socket - when
I say proprietary I mean that the EOL character is the ASCII null character
(\000) and not the '\n' character.
> >
> >I've looked at the examples in the OReilly book, but I'm not sure how to
change the default End Of Line character (\n) to \000.
> >
> >Will I have to do some sort of pattern match on the stream so that I can
deal with 'each line' using \000 as the EOL character?
> >
> >Do the input, input_line, read, or read_line methods accept a different
EOL character as a parameter - or can I define the method differently?
> >
> >Since I can read in a certain amount of characters with methods like
read, can I find the location of the ASCII null character and read from the
stream until right after it?
> >
> >I hope I've asked good enough questions...
> >
> >Thanks for any help you guys can give!
> >
> >Let me know if anything's not clear enough...
> >
> >-Rich
> >
>
> Hi,
>
> you could try something like this
>
> let read_eol inchan =
>   let rec f buf =
>     let c = input_char inchan in
>     if c = '\000' then Buffer.contents buf
>     else begin Buffer.add_char buf c; f buf end
>   in f (Buffer.create 64);;
>
> or in 'revised syntax which I prefer)
>
> value read_eol inchan =
>   f (Buffer.create 64) where rec f buf =
>     let c = input_char inchan in
>     if c = '\000' then Buffer.contents buf
>     else do { Buffer.add_char buf c; f buf }
> ;
>
> (Note there is no exception handling in examples)
> Regards
> --
> Arturo Borquez
>
>
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