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yap-6.3/library/swi.yap
vsc 29d7bac9b7 a few extra portability fixes
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@2090 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
2008-02-12 18:10:48 +00:00

351 lines
8.3 KiB
Prolog

:- source.
:- style_check(all).
:- yap_flag(unknown,error).
% 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),[nth/3]).
:- use_module(library(system),[datime/1,
mktime/2]).
:- use_module(library(terms),[term_variables/2,
term_variables/3,
term_hash/2,
variant/2]).
:- dynamic
prolog:message/3.
:- multifile
prolog:message/3.
:- multifile
user:file_search_path/2.
:- dynamic
user:file_search_path/2.
prolog:is_list(L) :- var(L), !, fail.
prolog:is_list([]).
prolog:is_list([_|List]) :- prolog:is_list(List).
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(:,+,-).
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(_,_).
:- meta_predicate prolog:forall(:,:).
:- 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:nth1(I,L,A) :- nth(I,L,A).
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:forall(X,Y) :-
catch(do_forall(X,Y), fail_forall, fail).
prolog:string(_) :- fail.
do_forall(X,Y) :-
call(X),
do_for_forall(Y).
do_forall(_,_).
do_for_forall(Y) :- call(Y), !, fail.
do_for_forall(_) :- throw(fail_forall).
prolog:between(I,_,I).
prolog:between(I0,I,J) :- I0 < I,
I1 is I0+1,
prolog:between(I1,I,J).
% 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).
'$messages':prolog_message(_,L,L).
prolog:append([],L,L).
prolog:append([X|L0],L,[X|Lf]) :-
prolog:append(L0,L,Lf).
prolog:member(X,[X|_]).
prolog:member(X,[_|L0]) :-
prolog:member(X,L0).
prolog:select(Element, [Element|Rest], Rest).
prolog:select(Element, [Head|Tail], [Head|Rest]) :-
prolog:select(Element, Tail, Rest).
tv(Term,List) :- term_variables(Term,List).
prolog:term_variables(Term,List) :- tv(Term,List).
tv(Term,List,Tail) :- term_variables(Term,List,Tail).
prolog:term_variables(Term,List,Tail) :- tv(Term,List,Tail).
prolog:working_directory(OCWD,NCWD) :-
getcwd(OCWD),
(var(NCWD) -> true ; cd(NCWD)).
prolog:chdir(X) :- cd(X).
% Time is given as int, not as float.
prolog:get_time(Secs) :- datime(Datime), mktime(Datime, Secs).
% Time is received as int, and converted to "..."
prolog:convert_time(X,Y) :- swi:ctime(X,Y).
:- hide(atom_concat).
prolog:atom_concat(A,B) :- atomic_concat(A,B).
prolog:atom_concat(A,B,C) :- atomic_concat(A,B,C).
:- hide(create_mutable).
:- hide(get_mutable).
:- hide(update_mutable).
prolog:hash_term(X,Y) :- term_hash(X,Y).
:- meta_predicate prolog:maplist(:,?), prolog:maplist(:,?,?), prolog:maplist(:,?,?).
prolog:maplist(_, []).
prolog:maplist(G, [H|L]) :-
call(G,H),
prolog:maplist(G, L).
prolog:maplist(_, [], []).
prolog:maplist(G, [H1|L1], [H2|L2]) :-
call(G,H1,H2),
prolog:maplist(G, L1, L2).
prolog:maplist(_, [], [], []).
prolog:maplist(G, [H1|L1], [H2|L2], [H3|L3]) :-
call(G,H1,H2,H3),
prolog:maplist(G, L1, L2, L3).
prolog:make.
prolog:source_location(File,Line) :-
prolog_load_context(file, File),
prolog_load_context(term_position, '$stream_position'(_,Line,_)).
prolog:memberchk(Element, [Element|_]) :- !.
prolog:memberchk(Element, [_|Rest]) :-
prolog:memberchk(Element, Rest).
% copied from SWI lists library.
prolog:intersection([], _, []) :- !.
prolog:intersection([X|T], L, Intersect) :-
memberchk(X, L), !,
Intersect = [X|R],
prolog:intersection(T, L, R).
prolog:intersection([_|T], L, R) :-
prolog:intersection(T, L, R).
:- op(700, xfx, '=@=').
prolog:(Term1 =@= Term2) :-
variant(Term1, Term2), !.
%% flatten(+List1, ?List2) is det.
%
% Is true it List2 is a non nested version of List1.
%
% @deprecated Ending up needing flatten/3 often indicates,
% like append/3 for appending two lists, a bad
% design. Efficient code that generates lists
% from generated small lists must use difference
% lists, often possible through grammar rules for
% optimal readability.
prolog:flatten(List, FlatList) :-
flatten(List, [], FlatList0), !,
FlatList = FlatList0.
flatten(Var, Tl, [Var|Tl]) :-
var(Var), !.
flatten([], Tl, Tl) :- !.
flatten([Hd|Tl], Tail, List) :- !,
flatten(Hd, FlatHeadTail, List),
flatten(Tl, Tail, FlatHeadTail).
flatten(NonList, Tl, [NonList|Tl]).