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yap-6.3/library/swi.yap
vsc d170b34624 MaxOS fixes
Avoid a thread deadlock
improvements to SWI predicates.
make variables_in_term system builtin.


git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@2304 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
2008-08-12 01:27:23 +00:00

430 lines
11 KiB
Prolog

:- source.
:- style_check(all).
:- yap_flag(unknown,error).
:- yap_flag(open_expands_filename,false).
% redefines stuff in prolog module.
:- module(swi, []).
:- ensure_loaded(library(atts)).
:- use_module(library(charsio),[write_to_chars/2,read_from_chars/2]).
:- use_module(library(lists),[append/2,
append/3,
delete/3,
member/2,
min_list/2,
nth1/3,
nth0/3]).
:- use_module(library(system),
[datime/1,
mktime/2,
sleep/1]).
:- use_module(library(arg),
[genarg/3]).
:- use_module(library(terms),
[subsumes/2,
term_variables/2,
term_variables/3,
term_hash/2,
unifiable/3,
variant/2]).
:- unhide('$system_library_directories'),
unhide('$dir_separator').
% make sure we also use
:- user:library_directory(X),
atom(X),
atom_concat([X,'/swi'],SwiDir),
\+ user:library_directory(SwiDir),
asserta(user:library_directory(SwiDir)),
fail
;
true.
:- multifile swi_predicate_table/4.
swi_predicate_table(_,append(X,Y),lists,append(X,Y)).
swi_predicate_table(_,append(X,Y,Z),lists,append(X,Y,Z)).
swi_predicate_table(_,member(X,Y),lists,member(X,Y)).
swi_predicate_table(_,nextto(X,Y,Z),lists,nextto(X,Y,Z)).
swi_predicate_table(_,delete(X,Y,Z),lists,delete(X,Y,Z)).
swi_predicate_table(_,select(X,Y,Z),lists,select(X,Y,Z)).
swi_predicate_table(_,selectchk(X,Y,Z),lists,selectchk(X,Y,Z)).
swi_predicate_table(_,nth0(X,Y,Z),lists,nth0(X,Y,Z)).
swi_predicate_table(_,nth1(X,Y,Z),lists,nth1(X,Y,Z)).
swi_predicate_table(_,last(X,Y),lists,last(X,Y)).
swi_predicate_table(_,reverse(X,Y),lists,reverse(X,Y)).
swi_predicate_table(_,permutation(X,Y),lists,permutation(X,Y)).
swi_predicate_table(_,flatten(X,Y),lists,flatten(X,Y)).
swi_predicate_table(_,sumlist(X,Y),lists,sumlist(X,Y)).
swi_predicate_table(_,min_list(X,Y),lists,min_list(X,Y)).
swi_predicate_table(_,max_list(X,Y),lists,max_list(X,Y)).
swi_predicate_table(_,memberchk(X,Y),lists,memberchk(X,Y)).
swi_predicate_table(_,flatten(X,Y),lists,flatten(X,Y)).
swi_predicate_table(_,select(X,Y,Z),lists,select(X,Y,Z)).
swi_predicate_table(_,sublist(X,Y),lists,sublist(X,Y)).
swi_predicate_table(_,hash_term(X,Y),terms,term_hash(X,Y)).
swi_predicate_table(_,term_hash(X,Y),terms,term_hash(X,Y)).
swi_predicate_table(_,subsumes(X,Y),terms,subsumes(X,Y)).
swi_predicate_table(_,unifiable(X,Y,Z),terms,unifiable(X,Y,Z)).
swi_predicate_table(_,genarg(X,Y,Z),arg,genarg(X,Y,Z)).
swi_predicate_table(_,tmp_file(X,Y),system,tmp_file(X,Y)).
swi_isl(X) :- lists:is_list(X).
prolog:is_list(X) :- swi_isl(X).
swi_mchk(X,Y) :- lists:memberchk(X,Y).
prolog:memberchk(X,Y) :- swi_mchk(X,Y).
:- dynamic
prolog:message/3.
:- multifile
prolog:message/3.
:- multifile
user:file_search_path/2.
:- dynamic
user:file_search_path/2.
user:file_search_path(swi, Home) :-
current_prolog_flag(home, Home).
user:file_search_path(foreign, swi(ArchLib)) :-
current_prolog_flag(arch, Arch),
atom_concat('lib/', Arch, ArchLib).
user:file_search_path(foreign, swi(lib)).
:- meta_predicate prolog:predsort(:,+,-).
switv(X,Y) :- term_variables(X, Y).
switv(X,Y,Z) :- term_variables(X, Y, Z).
prolog:term_variables(X, Y) :-
switv(X, Y).
prolog:term_variables(X, Y, Z) :-
switv(X, Y, Z).
prolog:plus(X, Y, Z) :-
integer(X),
integer(Y), !,
Z is X + Y.
prolog:plus(X, Y, Z) :-
integer(X),
integer(Z), !,
Y is Z - X.
prolog:plus(X, Y, Z) :-
integer(Y),
integer(Z), !,
X is Z - Y.
%% predsort(:Compare, +List, -Sorted) is det.
%
% Sorts similar to sort/2, but determines the order of two terms
% by calling Compare(-Delta, +E1, +E2). This call must unify
% Delta with one of <, > or =. If built-in predicate compare/3 is
% used, the result is the same as sort/2. See also keysort/2.
prolog:predsort(P, L, R) :-
length(L, N),
predsort(P, N, L, _, R1), !,
R = R1.
predsort(P, 2, [X1, X2|L], L, R) :- !,
call(P, Delta, X1, X2),
sort2(Delta, X1, X2, R).
predsort(_, 1, [X|L], L, [X]) :- !.
predsort(_, 0, L, L, []) :- !.
predsort(P, N, L1, L3, R) :-
N1 is N // 2,
plus(N1, N2, N),
predsort(P, N1, L1, L2, R1),
predsort(P, N2, L2, L3, R2),
predmerge(P, R1, R2, R).
sort2(<, X1, X2, [X1, X2]).
sort2(=, X1, _, [X1]).
sort2(>, X1, X2, [X2, X1]).
predmerge(_, [], R, R) :- !.
predmerge(_, R, [], R) :- !.
predmerge(P, [H1|T1], [H2|T2], Result) :-
call(P, Delta, H1, H2),
predmerge(Delta, P, H1, H2, T1, T2, Result).
predmerge(>, P, H1, H2, T1, T2, [H2|R]) :-
predmerge(P, [H1|T1], T2, R).
predmerge(=, P, H1, _, T1, T2, [H1|R]) :-
predmerge(P, T1, T2, R).
predmerge(<, P, H1, H2, T1, T2, [H1|R]) :-
predmerge(P, T1, [H2|T2], R).
%
% maybe a good idea to eventually support this in YAP.
% but for now just ignore it.
%
:- meta_predicate prolog:volatile(:).
:- op(1150, fx, 'volatile').
prolog:volatile(P) :- var(P),
throw(error(instantiation_error,volatile(P))).
prolog:volatile(M:P) :-
do_volatile(P,M).
prolog:volatile((G1,G2)) :-
prolog:volatile(G1),
prolog:volatile(G2).
prolog:volatile(P) :-
do_volatile(P,_).
prolog:load_foreign_library(P,Command) :-
absolute_file_name(P,[file_type(executable),solutions(first),file_errors(fail)],Lib),
load_foreign_files([Lib],[],Command).
prolog:load_foreign_library(P) :-
prolog:load_foreign_library(P,install).
do_volatile(_,_).
:- use_module(library(lists)).
prolog:term_to_atom(Term,Atom) :-
nonvar(Atom), !,
atom_codes(Atom,S),
read_from_chars(S,Term).
prolog:term_to_atom(Term,Atom) :-
write_to_chars(Term,S),
atom_codes(Atom,S).
prolog:concat_atom([A|List], Separator, New) :- var(List), !,
atom_codes(Separator,[C]),
atom_codes(New, NewChars),
split_atom_by_chars(NewChars,C,L,L,A,List).
prolog:concat_atom(List, Separator, New) :-
add_separator_to_list(List, Separator, NewList),
atomic_concat(NewList, New).
prolog:concat_atom(List, New) :-
atomic_concat(List, New).
split_atom_by_chars([],_,[],L,A,[]):-
atom_codes(A,L).
split_atom_by_chars([C|NewChars],C,[],L,A,[NA|Atoms]) :- !,
atom_codes(A,L),
split_atom_by_chars(NewChars,C,NL,NL,NA,Atoms).
split_atom_by_chars([C1|NewChars],C,[C1|LF],LAtom,Atom,Atoms) :-
split_atom_by_chars(NewChars,C,LF,LAtom,Atom,Atoms).
add_separator_to_list([], _, []).
add_separator_to_list([T], _, [T]) :- !.
add_separator_to_list([H|T], Separator, [H,Separator|NT]) :-
add_separator_to_list(T, Separator, NT).
prolog:setenv(X,Y) :- unix(putenv(X,Y)).
prolog:prolog_to_os_filename(X,X).
prolog:is_absolute_file_name(X) :-
absolute_file_name(X,X).
prolog:read_clause(X,Y) :-
read_term(X,Y,[singetons(warning)]).
prolog:string(_) :- fail.
slp(T) :- sleep(T).
prolog:sleep(T) :-
slp(T).
% SWI has a dynamic attribute scheme
prolog:get_attr(Var, Mod, Att) :-
AttTerm =.. [Mod,_,Att],
attributes:get_module_atts(Var, AttTerm).
prolog:put_attr(Var, Mod, Att) :-
AttTerm =.. [Mod,_,Att],
attributes:put_module_atts(Var, AttTerm).
prolog:del_attr(Var, Mod) :-
AttTerm =.. [Mod,_,_],
attributes:del_all_module_atts(Var, AttTerm).
prolog:get_attrs(AttVar, SWIAtts) :-
get_all_swi_atts(AttVar,SWIAtts).
prolog:put_attrs(_, []).
prolog:put_attrs(V, Atts) :-
cvt_to_swi_atts(Atts, YapAtts),
attributes:put_att_term(V, YapAtts).
cvt_to_swi_atts([], _).
cvt_to_swi_atts(att(Mod,Attribute,Atts), ModAttribute) :-
ModAttribute =.. [Mod, YapAtts, Attribute],
cvt_to_swi_atts(Atts, YapAtts).
bindings_message(V) -->
{ cvt_bindings(V, Bindings) },
prolog:message(query(_YesNo,Bindings)), !.
cvt_bindings([],[]).
cvt_bindings([[Name|Value]|L],[AName=Value|Bindings]) :-
atom_codes(AName, Name),
cvt_bindings(L,Bindings).
'$messages':prolog_message(_,L,L).
prolog:working_directory(OCWD,NCWD) :-
getcwd(OCWD),
(var(NCWD) -> true ; cd(NCWD)).
prolog:chdir(X) :- cd(X).
% Time is given as int, not as float.
prolog:get_time(Secs) :- datime(Datime), mktime(Datime, Secs).
% Time is received as int, and converted to "..."
prolog:convert_time(X,Y) :- swi:ctime(X,Y).
:- hide(atom_concat).
prolog:atom_concat(A,B) :- atomic_concat(A,B).
prolog:atom_concat(A,B,C) :- atomic_concat(A,B,C).
:- hide(create_mutable).
:- hide(get_mutable).
:- hide(update_mutable).
prolog:make.
prolog:source_location(File,Line) :-
prolog_load_context(file, File),
prolog_load_context(term_position, '$stream_position'(_,Line,_)).
% copied from SWI lists library.
lists:intersection([], _, []) :- !.
lists:intersection([X|T], L, Intersect) :-
memberchk(X, L), !,
Intersect = [X|R],
lists:intersection(T, L, R).
lists:intersection([_|T], L, R) :-
lists:intersection(T, L, R).
:- op(700, xfx, '=@=').
prolog:(Term1 =@= Term2) :-
variant(Term1, Term2), !.
% copied from SWI's boot/apply library
:- module_transparent
prolog:maplist/2,
maplist2/2,
prolog:maplist/3,
maplist2/3,
prolog:maplist/4,
maplist2/4,
prolog:maplist/5,
maplist2/5.
% maplist(:Goal, +List)
%
% True if Goal can succesfully be applied on all elements of List.
% Arguments are reordered to gain performance as well as to make
% the predicate deterministic under normal circumstances.
prolog:maplist(Goal, List) :-
maplist2(List, Goal).
maplist2([], _).
maplist2([Elem|Tail], Goal) :-
call(Goal, Elem),
maplist2(Tail, Goal).
% maplist(:Goal, ?List1, ?List2)
%
% True if Goal can succesfully be applied to all succesive pairs
% of elements of List1 and List2.
prolog:maplist(Goal, List1, List2) :-
maplist2(List1, List2, Goal).
maplist2([], [], _).
maplist2([Elem1|Tail1], [Elem2|Tail2], Goal) :-
call(Goal, Elem1, Elem2),
maplist2(Tail1, Tail2, Goal).
% maplist(:Goal, ?List1, ?List2, ?List3)
%
% True if Goal can succesfully be applied to all succesive triples
% of elements of List1..List3.
prolog:maplist(Goal, List1, List2, List3) :-
maplist2(List1, List2, List3, Goal).
maplist2([], [], [], _).
maplist2([Elem1|Tail1], [Elem2|Tail2], [Elem3|Tail3], Goal) :-
call(Goal, Elem1, Elem2, Elem3),
maplist2(Tail1, Tail2, Tail3, Goal).
% maplist(:Goal, ?List1, ?List2, ?List3, List4)
%
% True if Goal can succesfully be applied to all succesive
% quadruples of elements of List1..List4
prolog:maplist(Goal, List1, List2, List3, List4) :-
maplist2(List1, List2, List3, List4, Goal).
maplist2([], [], [], [], _).
maplist2([Elem1|Tail1], [Elem2|Tail2], [Elem3|Tail3], [Elem4|Tail4], Goal) :-
call(Goal, Elem1, Elem2, Elem3, Elem4),
maplist2(Tail1, Tail2, Tail3, Tail4, Goal).
prolog:compile_aux_clauses([]).
prolog:compile_aux_clauses([(:- G)|Cls]) :-
prolog_load_context(module, M),
once(M:G),
prolog:compile_aux_clauses(Cls).
prolog:compile_aux_clauses([Cl|Cls]) :-
prolog_load_context(module, M),
assert_static(M:Cl),
prolog:compile_aux_clauses(Cls).
%
% convert from SWI's goal expansion to YAP/SICStus old style goal
% expansion.
%
user:term_expansion(goal_expansion(A,B),O) :-
prolog_load_context(module, user), !,
O = goal_expansion(A,user,B).
user:term_expansion(user:goal_expansion(A,B),O) :- !,
O = user:goal_expansion(A,_,B).
user:term_expansion((goal_expansion(A,B) :- G), O) :-
prolog_load_context(module, user), !,
O = (goal_expansion(A,user,B) :- G).
user:term_expansion((user:goal_expansion(A,B) :- G),O) :-
O = (user:goal_expansion(A,_,B) :- G).