e5f4633c39
which included commits to RCS files with non-trunk default branches. git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@5 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
121 lines
3.1 KiB
Prolog
121 lines
3.1 KiB
Prolog
/*************************************************************************
|
|
* *
|
|
* YAP Prolog *
|
|
* *
|
|
* Yap Prolog was developed at NCCUP - Universidade do Porto *
|
|
* *
|
|
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
|
|
* *
|
|
**************************************************************************
|
|
* *
|
|
* File: charsio.yap *
|
|
* Last rev: 5/12/99 *
|
|
* mods: *
|
|
* comments: I/O on character strings *
|
|
* *
|
|
*************************************************************************/
|
|
|
|
:- module(charsio, [
|
|
format_to_chars/3,
|
|
format_to_chars/4,
|
|
write_to_chars/3,
|
|
write_to_chars/2,
|
|
atom_to_chars/3,
|
|
atom_to_chars/2,
|
|
number_to_chars/3,
|
|
number_to_chars/2,
|
|
read_from_chars/2,
|
|
open_chars_stream/2,
|
|
with_output_to_chars/2,
|
|
with_output_to_chars/3,
|
|
with_output_to_chars/4
|
|
]).
|
|
|
|
format_to_chars(Form, Args, OUT) :-
|
|
format_to_chars(Form, Args, [], OUT).
|
|
|
|
format_to_chars(Form, Args, L0, OUT) :-
|
|
open_mem_write_stream(Stream),
|
|
format(Stream,Form,Args),
|
|
peek_mem_write_stream(Stream, L0, OUT),
|
|
close(Stream).
|
|
|
|
write_to_chars(Term, OUT) :-
|
|
write_to_chars(Term, [], OUT).
|
|
|
|
write_to_chars(Term, L0, OUT) :-
|
|
open_mem_write_stream(Stream),
|
|
write(Stream, Term),
|
|
peek_mem_write_stream(Stream, L0, OUT),
|
|
close(Stream).
|
|
|
|
atom_to_chars(Atom, OUT) :-
|
|
atom_to_chars(Atom, [], OUT).
|
|
|
|
atom_to_chars(Atom, L0, OUT) :-
|
|
var(Atom), !,
|
|
throw(error(instantiation_error,atom_to_chars(Atom, L0, OUT))).
|
|
atom_to_chars(Atom, L0, OUT) :-
|
|
atom(Atom), !,
|
|
open_mem_write_stream(Stream),
|
|
write(Stream, Atom),
|
|
peek_mem_write_stream(Stream, L0, OUT),
|
|
close(Stream).
|
|
atom_to_chars(Atom, L0, OUT) :-
|
|
throw(error(type_error(atom,Atom),atom_to_chars(Atom, L0, OUT))).
|
|
|
|
number_to_chars(Number, OUT) :-
|
|
number_to_chars(Number, [], OUT).
|
|
|
|
number_to_chars(Number, L0, OUT) :-
|
|
var(Number), !,
|
|
throw(error(instantiation_error,number_to_chars(Number, L0, OUT))).
|
|
number_to_chars(Number, L0, OUT) :-
|
|
number(Number), !,
|
|
open_mem_write_stream(Stream),
|
|
write(Stream, Number),
|
|
peek_mem_write_stream(Stream, L0, OUT),
|
|
close(Stream).
|
|
number_to_chars(Number, L0, OUT) :-
|
|
throw(error(type_error(number,Number),number_to_chars(Number, L0, OUT))).
|
|
|
|
read_from_chars(Chars, Term) :-
|
|
open_mem_read_stream(Chars, Stream),
|
|
read(Stream, Term),
|
|
close(Stream).
|
|
|
|
open_chars_stream(Chars, Stream) :-
|
|
open_mem_read_stream(Chars, Stream).
|
|
|
|
with_output_to_chars(Goal, Chars) :-
|
|
with_output_to_chars(Goal, [], Chars).
|
|
|
|
with_output_to_chars(Goal, L0, Chars) :-
|
|
with_output_to_chars(Goal, Stream, L0, Chars),
|
|
close(Stream).
|
|
|
|
with_output_to_chars(Goal, Stream, L0, Chars) :-
|
|
open_mem_write_stream(Stream),
|
|
current_output(SO),
|
|
set_output(Stream),
|
|
do_output_to_chars(Goal, Stream, L0, Chars, SO).
|
|
|
|
do_output_to_chars(Goal, Stream, L0, Chars, SO) :-
|
|
catch(Goal, Exception, handle_exception(Exception,Stream,SO)),
|
|
!,
|
|
set_output(SO),
|
|
peek_mem_write_stream(Stream, L0, Chars).
|
|
do_output_to_chars(_Goal, Stream, _L0, _Chars, SO) :-
|
|
set_output(SO),
|
|
close(Stream),
|
|
fail.
|
|
|
|
handle_exception(Exception, Stream, SO) :-
|
|
close(Stream),
|
|
current_output(SO),
|
|
throw(Exception).
|
|
|
|
|
|
|
|
|