diogo/yap-6.3
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fix atom_term builtin not to require previous loading of charsio.

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This commit is contained in:
Vitor Santos Costa 2011-01-20 11:51:46 -06:00
parent d593f99c13
commit d52d05a626
2 changed files with 17 additions and 13 deletions
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13
library/charsio.yap
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@ -49,13 +49,6 @@ format_to_chars(Form, Args, OUT, L0) :-
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, O),
close(Stream),
O = OUT.
atom_to_chars(Atom, OUT) :-
atom_to_chars(Atom, [], OUT).
@ -88,12 +81,6 @@ number_to_chars(Number, L0, OUT) :-
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, T),
close(Stream),
T = Term.
open_chars_stream(Chars, Stream) :-
open_mem_read_stream(Chars, Stream).

17
pl/utils.yap
View File

@ -684,6 +684,23 @@ term_to_atom(Term,Atom) :-
charsio:write_to_chars(Term,S),
atom_codes(Atom,S).
%
% hack this here.
%
charsio:write_to_chars(Term, L0, OUT) :-
charsio:open_mem_write_stream(Stream),
prolog:write(Stream, Term),
charsio:peek_mem_write_stream(Stream, L0, O),
prolog:close(Stream),
O = OUT.
charsio:read_from_chars(Chars, Term) :-
charsio:open_mem_read_stream(Chars, Stream),
prolog:read(Stream, T),
prolog:close(Stream),
T = Term.
simple(V) :- var(V), !.
simple(A) :- atom(A), !.
simple(N) :- number(N).