%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Logtalk - Object oriented extension to Prolog
%  Release 2.9.3
%
%  configuration file for YAP Prolog 4.3.x
%
%  last updated: December 30, 2001
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


% the following initialization is not needed to run Logtalk altough
% is recommended; you can comment it out if needed

:- initialization(
	(set_prolog_flag(update_semantics, logical),
	 set_prolog_flag(unknown, error))).



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  ISO Prolog Standard predicates that we must define because they are
%  not built-in
%
%  add a clause for lgt_iso_predicate/1 declaring each ISO predicate that
%  we must define; there must be at least one clause for this predicate
%  whose call should fail if we don't define any ISO predicates
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


% lgt_iso_predicate(?callable).

lgt_iso_predicate(_) :-
	fail.



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  predicate properties
%
%  this predicate must return at least static, dynamic and built_in 
%  properties for an existing predicate
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


% lgt_predicate_property(+callable, ?predicate_property)

lgt_predicate_property(Pred, Prop) :-
	predicate_property(Pred, Prop).



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  metapredicates
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


% forall(+callable, +callble)

forall(Generate, Test) :-
	\+ call((Generate, \+ call(Test))).


% lgt_call/2-8
%
% use these definitions only if your compiler does
% not provide call/1-8 as built-in predicates

lgt_call(F, A) :-
	call_with_args(F, A).


lgt_call(F, A1, A2) :-
	call_with_args(F, A1, A2).


lgt_call(F, A1, A2, A3) :-
	call_with_args(F, A1, A2, A3).


lgt_call(F, A1, A2, A3, A4) :-
	call_with_args(F, A1, A2, A3, A4).


lgt_call(F, A1, A2, A3, A4, A5) :-
	call_with_args(F, A1, A2, A3, A4, A5).


lgt_call(F, A1, A2, A3, A4, A5, A6) :-
	call_with_args(F, A1, A2, A3, A4, A5, A6).


lgt_call(F, A1, A2, A3, A4, A5, A6, A7) :-
	call_with_args(F, A1, A2, A3, A4, A5, A6, A7).


% lgt_once/2-8
%
% if your compiler provides call/1-8 as built-in 
% predicates rewrite these definitions using call(...), !.

lgt_once(F, A) :-
	call_with_args(F, A),
	!.


lgt_once(F, A1, A2) :-
	call_with_args(F, A1, A2),
	!.


lgt_once(F, A1, A2, A3) :-
	call_with_args(F, A1, A2, A3),
	!.


lgt_once(F, A1, A2, A3, A4) :-
	call_with_args(F, A1, A2, A3, A4),
	!.


lgt_once(F, A1, A2, A3, A4, A5) :-
	call_with_args(F, A1, A2, A3, A4, A5),
	!.


lgt_once(F, A1, A2, A3, A4, A5, A6) :-
	call_with_args(F, A1, A2, A3, A4, A5, A6),
	!.


lgt_once(F, A1, A2, A3, A4, A5, A6, A7) :-
	call_with_args(F, A1, A2, A3, A4, A5, A6, A7),
	!.



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  file extension predicates
%
%  these extensions are used by Logtalk load/compile predicates
%
%  you may want to change the extension for Prolog files to match 
%  the one expected by your Prolog compiler
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


% lgt_file_extension(?atom, ?atom)

lgt_file_extension(logtalk, '.lgt').
lgt_file_extension(prolog, '.pl').
lgt_file_extension(xml, '.xml').



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  default flag values
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


% lgt_default_flag(?atom, ?atom)
%
% default values for all flags

lgt_default_flag(iso_initialization_dir, true).

lgt_default_flag(xml, on).
lgt_default_flag(xsl, 'lgtxml.xsl').

lgt_default_flag(unknown, warning).
lgt_default_flag(misspelt, warning).
lgt_default_flag(singletons, warning).
lgt_default_flag(lgtredef, warning).
lgt_default_flag(plredef, silent).
lgt_default_flag(portability, silent).

lgt_default_flag(report, on).



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  list predicates
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


lgt_append([], List, List).
lgt_append([Head| Tail], List, [Head| Tail2]) :-
	lgt_append(Tail, List, Tail2).


lgt_member(Head, [Head| _]).
lgt_member(Head, [_| Tail]) :-
	lgt_member(Head, Tail).


lgt_member_var(V, [H| _]) :-
	V == H.
lgt_member_var(V, [_| T]) :-
	lgt_member_var(V, T).


lgt_proper_list([]).
lgt_proper_list([_| List]) :-
	lgt_proper_list(List).



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  file predicates
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


% lgt_file_exists(+atom)
%
% see if a file exist in the current directory

lgt_file_exists(File) :-
	exists(File).


% lgt_load_prolog_code(+atom)
%
% compile and load a Prolog file

lgt_load_prolog_code(File) :-
	reconsult(File).



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  sorting predicates
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


% lgt_keysort(+list, -list)

lgt_keysort(List, Sorted) :-
	keysort(List, Sorted).


% lgt_sort(+list, -list)

lgt_sort(List, Sorted) :-
	sort(List, Sorted).



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  time and date predicates
%
%  if your Prolog compiler does not provide access to the operating system 
%  time and date just write dummy definitions
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


% lgt_current_date(?Year, ?Month, ?Day)

lgt_current_date(99, 2, 7).


% lgt_current_time(?Hours, ?Mins, ?Secs)

lgt_current_time(0, 0, 0).



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  timing predicate
%
%  if your Prolog compiler does not provide access to a timing predicate 
%  just write dummy definition
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


% lgt_cpu_time(-Seconds)

lgt_cpu_time(Seconds) :-
	Seconds is cputime.



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  comparison predicate
%
%  the usual compare/3 definition
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


% compare(?atom, @term, @term) -- built-in



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  end!
%
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