Re: put_code

[m . degregorio]

Muito obrigado Salvador,
it seems that can help me very much.
I am going to try it in my application and I'll let you know.

Thanks again
    Massimo

Citando Salvador Pinto Abreu <address@hidden>:

> On Nov 1, 2012, at 11:30, address@hidden wrote:
>
> > I am trying to automatically generate PPM P5 files.
> > In order to write the binary part of the files, I am using
> >
> > put_code/1
>
> maybe, considering you are building a non-text file, you'd be better  
>  off having Prolog use a binary stream, in which case you'd be using  
>  the put_byte/1 built-in.
>
> consider this, for instance:
>
> 11:56:56$ gprolog
> GNU Prolog 1.4.1
> By Daniel Diaz
> Copyright (C) 1999-2012 Daniel Diaz
> | ?- open(foo, write, _FOO, [type(binary), alias(foo)]),
>      set_output(foo),
>      put_byte(0), put_byte(1), put_byte(2), put_byte(3),
>      close(foo).
>
> (1 ms) yes
> | ?- halt.
>
> 11:57:05$ od -b foo
> 0000000   000 001 002 003
> 0000004
> 11:57:10$ ls -l foo
> -rw-r--r--  1 spa  staff     4B Nov  1 11:56 foo
> 11:57:19$
>
> hope this helps
> -salvador



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Massimo De Gregorio
Research Scientist
Istituto di Cibernetica "Eduardo Caianiello" - CNR
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Skype: massimo.de.gregorio
E-mail: address@hidden
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