Sequence and ascii characters

[Oscar Martinez]

Hi all!

I'm quite newbie to Io, I discovered it the year before, during summer
holidays and I have to say I love it. All of you are doing a great job.

Well, my problem is that I need to feed a Sequence object with a string that
has ascii characters (and they have to be ascii, no other encoding) above
0x7F and later parse the Sequence to get every character.

So I get the following:

Io 20080107
Io> S := Sequence clone
==>
Io> S appendSeq("aaa■aaa")

  Exception: compile error: "unmatched ()s" on line 1 character 1
  ---------
  message 'Error' in '[unlabeled]' on line 0


But, I'm able to do the following instead:

Io 20080107
Io> S := Sequence clone
==>
Io> S appendSeq("aaa")
==> aaa
Io> S append(254)
==> aaa■
Io> S appendSeq("aaa")
==> aaa■aaa
Io> S byteAt(3)
==> 254

The same problem happens when I try to pass that kind of string as an
argument to an Io program (and this is what I really need to do).

Is there a way to do it like in the first example?

Thank you very much and congratulations for the great, great job.

Oscar.

[Danya Alexeyevsky]

Currently, Io treats interactive input, program code and program
arguments as UTF8 (ignoring locale, too). The only way you can pass
non-UTF data to Io is through file read operations (e.g., standard
input).

Here's a piece of code I played around with to check it. I hope that helps.

{{{
#!/usr/bin/env io

p := method(s,
 for(i, 0, s size println, s at(i) println)
)

# p(System args println at(1))
p(File standardInput contents)
}}}

Cheers,
- Danya

[Oscar Martinez]

Thank you very much.

I will give it a try.
I want to embed Io into a C++ application which will pass the string to an
Io program to be parsed. So I will see if the standardInput method will work
for me. If not I will investage other methods to do it (maybe implementing
an Io socket server and sending the strings via socket...)

Regards.

Oscar.




On Tue, May 6, 2008 at 11:04 PM, Danya Alexeyevsky <me.dendik@...>
wrote:

>   Currently, Io treats interactive input, program code and program
> arguments as UTF8 (ignoring locale, too). The only way you can pass
> non-UTF data to Io is through file read operations (e.g., standard
> input).
>
> Here's a piece of code I played around with to check it. I hope that
> helps.
>
> {{{
> #!/usr/bin/env io
>
> p := method(s,
> for(i, 0, s size println, s at(i) println)
> )
>
> # p(System args println at(1))
> p(File standardInput contents)
> }}}
>
> Cheers,
> - Danya
>  
>

[Oscar Martinez]

Finally, I found a solution that meets my requeriments using
iconv_open/iconv/iconv_close to convert a string from LATIN1 to UTF8 and
then, in the Io program the parsing is done:

myarg := System args at(0)
d := Sequence clone
//Latin1 Thorn letter is the string delimiter
d append(254)
l := myarg split(d)

That´s all.

Oscar.

PD: My aplogizes for not preppending "[Io]" to the subject. Sorry.

On Wed, May 7, 2008 at 10:53 AM, Oscar Martinez <wasi.network@...>
wrote:

> Thank you very much.
>
> I will give it a try.
> I want to embed Io into a C++ application which will pass the string to an
> Io program to be parsed. So I will see if the standardInput method will work
> for me. If not I will investage other methods to do it (maybe implementing
> an Io socket server and sending the strings via socket...)
>
> Regards.
>
> Oscar.
>
>
>
>
>
> On Tue, May 6, 2008 at 11:04 PM, Danya Alexeyevsky <me.dendik@...>
> wrote:
>
> >   Currently, Io treats interactive input, program code and program
> > arguments as UTF8 (ignoring locale, too). The only way you can pass
> > non-UTF data to Io is through file read operations (e.g., standard
> > input).
> >
> > Here's a piece of code I played around with to check it. I hope that
> > helps.
> >
> > {{{
> > #!/usr/bin/env io
> >
> > p := method(s,
> > for(i, 0, s size println, s at(i) println)
> > )
> >
> > # p(System args println at(1))
> > p(File standardInput contents)
> > }}}
> >
> > Cheers,
> > - Danya
> >  
> >
>
>

[Paulo Köch]

On Wed, May 7, 2008 at 3:11 PM, Oscar Martinez <wasi.network@...> wrote:
> PD: My aplogizes for not preppending "[Io]" to the subject. Sorry.

I think it's added automatically by the mailing list, no need to apologise. =P