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f13215700b
yap-6.3/pl/consult.yap
ubu32 9691a0843d port flush predicates.
2011-02-14 11:28:44 -08:00

1042 lines
35 KiB
Prolog
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/*************************************************************************
* *
* YAP Prolog *
* *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
* *
**************************************************************************
* *
* File: consult.yap *
* Last rev: 8/2/88 *
* mods: *
* comments: Consulting Files in YAP *
* *
*************************************************************************/
%
% SWI options
% autoload(true,false)
% derived_from(File) -> make
% encoding(Encoding) => implemented
% expand({true,false)
% if(changed,true,not_loaded) => implemented
% imports(all,List) => implemented
% qcompile(true,false)
% silent(true,false) => implemented
% stream(Stream) => implemented
% consult(consult,reconsult) => implemented
% compilation_mode(compact,source,assert_all) => implemented
%
load_files(Files,Opts) :-
'$load_files'(Files,Opts,load_files(Files,Opts)).
'$load_files'(Files,Opts,Call) :-
'$check_files'(Files,load_files(Files,Opts)),
'$process_lf_opts'(Opts,Silent,InfLevel,Expand,Changed,CompilationMode,Imports,Stream,Encoding,SkipUnixComments,CompMode,Reconsult,Files,Call),
'$check_use_module'(Call,UseModule),
'$current_module'(M0),
'$lf'(Files,M0,Call,InfLevel,Expand,Changed,CompilationMode,Imports,Stream,Encoding,SkipUnixComments,CompMode,Reconsult,UseModule),
'$close_lf'(Silent).
'$check_files'(Files,Call) :-
var(Files), !,
'$do_error'(instantiation_error,Call).
'$check_files'(M:Files,Call) :- !,
(var(M)
->
'$do_error'(instantiation_error,Call)
;
atom(M)
->
'$check_files'(Files,Call)
;
'$do_error'(type_error(atom,M),Call)
).
'$check_files'(Files,Call) :-
(ground(Files)
->
true
;
'$do_error'(instantiation_error,Call)
).
'$process_lf_opts'(V,_,_,_,_,_,_,_,_,_,_,_,_,Call) :-
var(V), !,
'$do_error'(instantiation_error,Call).
'$process_lf_opts'([],_,InfLevel,_,_,_,_,_,Encoding,_,_,_,_,_) :-
(var(Encoding) ->
'$default_encoding'(Encoding)
;
true
).
'$process_lf_opts'([Opt|Opts],Silent,InfLevel,Expand,Changed,CompilationMode,Imports,Stream,Encoding,SkipUnixComments,CompMode,Reconsult,Files,Call) :-
'$process_lf_opt'(Opt,Silent,InfLevel,Expand,Changed,CompilationMode,Imports,Stream,Encoding,SkipUnixComments,CompMode,Reconsult,Files,Call), !,
'$process_lf_opts'(Opts,Silent,InfLevel,Expand,Changed,CompilationMode,Imports,Stream,Encoding,SkipUnixComments,CompMode,Reconsult,Files,Call).
'$process_lf_opts'([Opt|_],_,_,_,_,_,_,_,_,_,_,_,_,Call) :-
'$do_error'(domain_error(unimplemented_option,Opt),Call).
'$process_lf_opt'(autoload(true),Silent,InfLevel,_,_,_,_,_,_,_,_,_,_,_) :-
get_value('$verbose_auto_load',VAL),
(VAL = true ->
InfLevel = informational,
(get_value('$lf_verbose',informational) -> true ; Silent = silent),
set_value('$lf_verbose',informational)
;
InfLevel = silent,
(get_value('$lf_verbose',silent) -> true ; Silent = informational),
set_value('$lf_verbose',silent)
).
'$process_lf_opt'(autoload(false),_,_,_,_,_,_,_,_,_,_,_,_,_).
'$process_lf_opt'(derived_from(File),_,_,_,_,_,_,_,_,_,_,_,Files,Call) :-
( atom(File) -> true ; '$do_error'(type_error(atom,File),Call) ),
( atom(Files) -> true ; '$do_error'(type_error(atom,Files),Call) ),
/* call make */
'$do_error'(domain_error(unimplemented_option,derived_from),Call).
'$process_lf_opt'(encoding(Encoding),_,_,_,_,_,_,_,_,EncCode,_,_,_,Call) :-
( var(Encoding) ->
'$do_error'(instantiation_error,Call)
;
'$valid_encoding'(Encoding, EncCode) ->
true
;
'$do_error'(domain_error(io_mode,encoding(Encoding)),Call)
).
'$process_lf_opt'(expand(true),_,_,true,_,_,_,_,_,_,_,_,_,Call) :-
'$do_error'(domain_error(unimplemented_option,expand),Call).
'$process_lf_opt'(expand(false),_,_,false,_,_,_,_,_,_,_,_,_,_).
'$process_lf_opt'(if(changed),_,_,_,changed,_,_,_,_,_,_,_,_,_).
'$process_lf_opt'(if(true),_,_,_,true,_,_,_,_,_,_,_,_,_).
'$process_lf_opt'(if(not_loaded),_,_,_,not_loaded,_,_,_,_,_,_,_,_,_).
'$process_lf_opt'(imports(all),_,_,_,_,_,_,_,_,_,_,_,_,_).
'$process_lf_opt'(imports(Imports),_,_,_,_,_,Imports,_,_,_,_,_,_,_).
'$process_lf_opt'(qcompile(true),_,_,_,_,true,_,_,_,_,_,_,_,Call) :-
'$do_error'(domain_error(unimplemented_option,qcompile),Call).
'$process_lf_opt'(qcompile(false),_,_,_,_,false,_,_,_,_,_,_,_,_).
'$process_lf_opt'(silent(true),Silent,silent,_,_,_,_,_,_,_,_,_,_,_) :-
( get_value('$lf_verbose',silent) -> true ; Silent = informational),
set_value('$lf_verbose',silent).
'$process_lf_opt'(silent(false),Silent,informational,_,_,_,_,_,_,_,_,_,_,_) :-
( get_value('$lf_verbose',informational) -> true ; Silent = silent),
set_value('$lf_verbose',informational).
'$process_lf_opt'(skip_unix_comments,_,_,_,_,_,_,_,_,skip_unix_comments,_,_,_,_).
'$process_lf_opt'(compilation_mode(source),_,_,_,_,_,_,_,_,_,source,_,_,_).
'$process_lf_opt'(compilation_mode(compact),_,_,_,_,_,_,_,_,_,compact,_,_,_).
'$process_lf_opt'(compilation_mode(assert_all),_,_,_,_,_,_,_,_,_,assert_all,_,_,_).
'$process_lf_opt'(consult(reconsult),_,_,_,_,_,_,_,_,_,_,reconsult,_,_).
'$process_lf_opt'(consult(consult),_,_,_,_,_,_,_,_,_,_,consult,_,_).
'$process_lf_opt'(stream(Stream),_,_,_,_,_,_,Stream,_,_,_,_,Files,Call) :-
/* ( '$stream'(Stream) -> true ; '$do_error'(domain_error(stream,Stream),Call) ), */
( atom(Files) -> true ; '$do_error'(type_error(atom,Files),Call) ).
'$check_use_module'(use_module(_),use_module(_)) :- !.
'$check_use_module'(use_module(_,_),use_module(_)) :- !.
'$check_use_module'(use_module(M,_,_),use_module(M)) :- !.
'$check_use_module'(_,load_files) :- !.
'$lf'(V,_,Call,_,_,_,_,_,_,_,_,_,_) :- var(V), !,
'$do_error'(instantiation_error,Call).
'$lf'([],_,_,_,_,_,_,_,_,_,_,_,_,_) :- !.
'$lf'(M:X, _, Call,InfLevel,Expand,Changed,CompilationMode,Imports,Stream,Encoding,SkipUnixComments,CompMode,Reconsult,UseModule) :- !,
(
atom(M)
->
'$lf'(X, M, Call,InfLevel,Expand,Changed,CompilationMode,Imports,Stream,Encoding,SkipUnixComments,CompMode,Reconsult,UseModule)
;
'$do_error'(type_error(atom,M),Call)
).
'$lf'([F|Fs], Mod,Call,InfLevel,Expand,Changed,CompilationMode,Imports,Stream,Encoding,SkipUnixComments,CompMode,Reconsult,UseModule) :- !,
'$lf'(F,Mod,Call,InfLevel,Expand,Changed,CompilationMode,Imports,Stream,Encoding,SkipUnixComments,CompMode,Reconsult,_),
'$lf'(Fs, Mod,Call,InfLevel,Expand,Changed,CompilationMode,Imports,Stream,Encoding,SkipUnixComments,CompMode,Reconsult,UseModule).
'$lf'(_, Mod, _,InfLevel,_,_,CompilationMode,Imports,Stream,_,Reconsult,SkipUnixComments,CompMode,UseModule) :-
nonvar(Stream), !,
'$do_lf'(Mod, Stream, InfLevel,CompilationMode,Imports,SkipUnixComments,CompMode,Reconsult,UseModule).
'$lf'(user, Mod, _,InfLevel,_,_,CompilationMode,Imports,_,_,SkipUnixComments,CompMode,Reconsult,UseModule) :- !,
'$do_lf'(Mod, user_input, InfLevel, CompilationMode,Imports,SkipUnixComments,CompMode,Reconsult,UseModule).
'$lf'(user_input, Mod, _,InfLevel,_,_,CompilationMode,Imports,_,_,SkipUnixComments,CompMode,Reconsult,UseModule) :- !,
'$do_lf'(Mod, user_input, InfLevel, CompilationMode,Imports,SkipUnixComments,CompMode,Reconsult,UseModule).
'$lf'(X, Mod, Call, InfLevel,_,Changed,CompilationMode,Imports,_,Enc,SkipUnixComments,CompMode,Reconsult,UseModule) :-
'$find_in_path'(X, Y, Call),
'$valid_encoding'(Encoding, Enc),
open(Y, read, Stream, [encoding(Encoding)]), !,
'$set_changed_lfmode'(Changed),
'$start_lf'(X, Mod, Stream, InfLevel, CompilationMode, Imports, Changed,SkipUnixComments,CompMode,Reconsult,UseModule),
'$close'(Stream).
'$lf'(X, _, Call, _, _, _, _, _, _, _, _, _, _, _) :-
'$do_error'(permission_error(input,stream,X),Call).
'$set_changed_lfmode'(true) :- !.
'$set_changed_lfmode'(_).
'$start_lf'(_, Mod, Stream,_ ,_, Imports, not_loaded, _, _, _, _) :-
'$file_loaded'(Stream, Mod, Imports), !.
'$start_lf'(_, Mod, Stream, _, _, Imports, changed, _, _, _, _) :-
'$file_unchanged'(Stream, Mod, Imports), !.
'$start_lf'(_, Mod, Stream, InfLevel, CompilationMode, Imports, _, SkipUnixComments, CompMode, Reconsult, UseModule) :-
'$do_lf'(Mod, Stream, InfLevel, CompilationMode, Imports, SkipUnixComments, CompMode, Reconsult, UseModule).
'$close_lf'(Silent) :-
nonvar(Silent), !,
set_value('$lf_verbose',Silent).
'$close_lf'(_).
ensure_loaded(Fs) :-
'$load_files'(Fs, [if(changed)],ensure_loaded(Fs)).
compile(Fs) :-
'$load_files'(Fs, [], compile(Fs)).
% consult(Fs) :-
% '$has_yap_or',
% '$do_error'(context_error(consult(Fs),clause),query).
consult(V) :-
var(V), !,
'$do_error'(instantiation_error,consult(V)).
consult(M0:Fs) :- !,
'$consult'(Fs, M0).
consult(Fs) :-
'$current_module'(M0),
'$consult'(Fs, M0).
'$consult'(Fs,Module) :-
'$access_yap_flags'(8, 2), % SICStus Prolog compatibility
!,
'$load_files'(Module:Fs,[],consult(Fs)).
'$consult'(Fs, Module) :-
'$load_files'(Module:Fs,[consult(consult)],consult(Fs)).
reconsult(Fs) :-
'$load_files'(Fs, [], reconsult(Fs)).
use_module(F) :-
'$load_files'(F, [if(not_loaded)], use_module(F)).
use_module(F,Is) :-
'$load_files'(F, [if(not_loaded),imports(Is)], use_module(F,Is)).
use_module(M,F,Is) :-
'$use_module'(M,F,Is).
'$use_module'(U,_F,Is) :- nonvar(U), U = user, !,
'$import_to_current_module'(user_input, user, Is).
'$use_module'(M,F,Is) :- nonvar(M), !,
recorded('$module','$module'(F1,M,_),_),
'$load_files'(F1, [if(not_loaded),imports(Is)], use_module(M,F,Is)),
F1 = F.
'$use_module'(M,F,Is) :- nonvar(F),
'$load_files'(F, [if(not_loaded),imports(Is)], use_module(M,F,Is)).
'$csult'(V, _) :- var(V), !,
'$do_error'(instantiation_error,consult(V)).
'$csult'([], _).
'$csult'([-F|L], M) :- !, '$load_files'(M:F, [],[-M:F]), '$csult'(L, M).
'$csult'([F|L], M) :- '$consult'(F, M), '$csult'(L, M).
'$do_lf'(ContextModule, Stream, InfLevel, _, Imports, SkipUnixComments, CompMode, Reconsult, UseModule) :-
nb_getval('$if_level',OldIncludeLevel),
nb_setval('$if_level',0),
( nb_getval('$system_mode', OldMode) -> true ; OldMode = off),
( OldMode == off -> '$enter_system_mode' ; true ),
'$record_loaded'(Stream, ContextModule, Reconsult),
'$current_module'(OldModule,ContextModule),
getcwd(OldD),
nb_getval('$consulting_file',OldF),
'$set_consulting_file'(Stream),
H0 is heapused, '$cputime'(T0,_),
'$file_name'(Stream,File),
'$fetch_stream_alias'(OldStream,'$loop_stream'),
set_stream(Stream,alias('$loop_stream')),
format('this~n',[]),
nb_getval('$consulting',Old),
nb_setval('$consulting',false),
'$access_yap_flags'(18,GenerateDebug),
'$consult_infolevel'(InfLevel),
'$comp_mode'(OldCompMode, CompMode),
( get_value('$syntaxcheckflag',on) -> '$init_style_check'(File) ; true ),
recorda('$initialisation','$',_),
( Reconsult = reconsult ->
'$start_reconsulting'(File),
'$start_consult'(Reconsult,File,LC),
'$remove_multifile_clauses'(File),
StartMsg = reconsulting,
EndMsg = reconsulted
;
'$start_consult'(Reconsult,File,LC),
StartMsg = consulting,
EndMsg = consulted
),
print_message(InfLevel, loading(StartMsg, File)),
( SkipUnixComments == skip_unix_comments ->
'$skip_unix_comments'(Stream)
;
true
),
'$loop'(Stream,Reconsult),
H is heapused-H0, '$cputime'(TF,_), T is TF-T0,
'$current_module'(Mod,OldModule),
print_message(InfLevel, loaded(EndMsg, File, Mod, T, H)),
'$end_consult',
(
Reconsult = reconsult ->
'$clear_reconsulting'
;
true
),
set_stream(OldStream,alias('$loop_stream')),
'$set_yap_flags'(18,GenerateDebug),
'$comp_mode'(CompMode, OldCompMode),
nb_setval('$consulting',Old),
nb_setval('$consulting_file',OldF),
cd(OldD),
% surely, we were in run mode or we would not have included the file!
nb_setval('$if_skip_mode',run),
% back to include mode!
nb_setval('$if_level',OldIncludeLevel),
'$bind_module'(Mod, UseModule),
'$import_to_current_module'(File, ContextModule, Imports),
( LC == 0 -> prompt(_,' |: ') ; true),
( OldMode == off -> '$exit_system_mode' ; true ),
'$exec_initialisation_goals',
!.
'$bind_module'(_, load_files).
'$bind_module'(Mod, use_module(Mod)).
'$import_to_current_module'(File, M, Imports) :-
recorded('$module','$module'(File,NM,Ps),_), M \= NM, !,
'$use_preds'(Imports, Ps, NM, M).
'$import_to_current_module'(_, _, _).
'$consult_infolevel'(InfoLevel) :- nonvar(InfoLevel), !.
'$consult_infolevel'(InfoLevel) :-
get_value('$lf_verbose',InfoLevel), InfoLevel \= [], !.
'$consult_infolevel'(informational).
'$start_reconsulting'(F) :-
recorda('$reconsulted','$',_),
recorda('$reconsulting',F,_).
'$initialization'(V) :-
var(V), !,
'$do_error'(instantiation_error,initialization(V)).
'$initialization'(C) :- number(C), !,
'$do_error'(type_error(callable,C),initialization(C)).
'$initialization'(C) :- db_reference(C), !,
'$do_error'(type_error(callable,C),initialization(C)).
'$initialization'(G) :-
'$show_consult_level'(Level1),
% it will be done after we leave the current consult level.
Level is Level1-1,
recordz('$initialisation',do(Level,G),_),
fail.
'$initialization'(_).
initialization(G,OPT) :-
'$initialization'(G,OPT).
'$initialization'(G,OPT) :-
(
var(G)
->
'$do_error'(instantiation_error,initialization(G,OPT))
;
number(G)
->
'$do_error'(type_error(callable,G),initialization(G,OPT))
;
db_reference(G)
->
'$do_error'(type_error(callable,G),initialization(G,OPT))
;
var(OPT)
->
'$do_error'(instantiation_error,initialization(G,OPT))
;
atom(OPT)
->
(
OPT == now
->
fail
;
OPT == after_load
->
fail
;
OPT == restore
->
fail
;
'$do_error'(domain_error(initialization,OPT),initialization(OPT))
)
;
'$do_error'(type_error(OPT),initialization(G,OPT))
).
'$initialization'(G,now) :-
( '$notrace'(G) -> true ; format(user_error,':- ~w:~w failed.~n',[M,G]) ).
'$initialization'(G,after_load) :-
'$initialization'(G).
% ignore for now.
'$initialization'(G,restore).
'$exec_initialisation_goals' :-
nb_setval('$initialization_goals',on),
fail.
'$exec_initialisation_goals' :-
recorded('$blocking_code',_,R),
erase(R),
fail.
% system goals must be performed first
'$exec_initialisation_goals' :-
recorded('$system_initialisation',G,R),
erase(R),
G \= '$',
'$notrace'(G),
fail.
'$exec_initialisation_goals' :-
'$show_consult_level'(Level),
'$current_module'(M),
findall(
G,
(recorded('$initialisation',do(Level,G),R), erase(R), G\='$'),
LGs),
lists:member(G,LGs),
nb_getval('$system_mode', OldMode),
( OldMode == on -> '$exit_system_mode' ; true ),
% run initialization under user control (so allow debugging this stuff).
(
'$system_catch'('$oncenotrace'(M:G), M, Error, user:'$LoopError'(Error, top)),
fail
;
OldMode = on,
'$enter_system_mode',
fail
).
'$exec_initialisation_goals' :-
nb_setval('$initialization_goals',off).
'$include'(V, _) :- var(V), !,
'$do_error'(instantiation_error,include(V)).
'$include'([], _) :- !.
'$include'([F|Fs], Status) :- !,
'$include'(F, Status),
'$include'(Fs, Status).
'$include'(X, Status) :-
get_value('$lf_verbose',Verbosity),
'$find_in_path'(X,Y,include(X)),
nb_getval('$included_file',OY),
nb_setval('$included_file', Y),
'$current_module'(Mod),
H0 is heapused, '$cputime'(T0,_),
'$default_encoding'(Enc),
'$valid_encoding'(Encoding, Enc),
( open(Y, read, Stream, [encoding(Encoding)]), !, % '$open'(Y, '$csult', Stream, 0, Encoding, X), !,
print_message(Verbosity, loading(including, Y)),
'$loop'(Stream,Status), close(Stream)
;
'$do_error'(permission_error(input,stream,Y),include(X))
),
H is heapused-H0, '$cputime'(TF,_), T is TF-T0,
print_message(Verbosity, loaded(included, Y, Mod, T, H)),
nb_setval('$included_file',OY).
'$do_startup_reconsult'(X) :-
( '$access_yap_flags'(15, 0) ->
'$system_catch'(load_files(X, [silent(true)]),Module,Error,'$Error'(Error))
;
set_value('$verbose',off),
'$system_catch'(load_files(X, [silent(true),skip_unix_comments]),Module,_,fail)
;
true
),
!,
( '$access_yap_flags'(15, 0) -> true ; halt).
'$skip_unix_comments'(Stream) :-
'$peek'(Stream, 0'#), !, % 35 is ASCII for '#
'$get0_line_codes'(Stream, _),
'$skip_unix_comments'(Stream).
'$skip_unix_comments'(_).
source_file(FileName) :-
recorded('$lf_loaded','$lf_loaded'(FileName,Mod,_,_),_), Mod \= prolog.
source_file(Mod:Pred, FileName) :-
current_module(Mod),
Mod \= prolog,
'$current_predicate_no_modules'(Mod,_,Pred),
'$owned_by'(Pred, Mod, FileName).
'$owned_by'(T, Mod, FileName) :-
'$is_multifile'(T, Mod),
functor(T, Name, Arity),
setof(FileName, Ref^recorded('$multifile_defs','$defined'(FileName,Name,Arity,Mod), Ref), L),
lists:member(FileName, L).
'$owned_by'(T, Mod, FileName) :-
'$owner_file'(T, Mod, FileName).
source_location(FileName, Line) :-
prolog_load_context(file, FileName),
prolog_load_context(term_position,'$stream_position'(_, Line, _, _, _)).
prolog_load_context(_, _) :-
nb_getval('$consulting_file',[]), !, fail.
prolog_load_context(directory, DirName) :-
getcwd(DirName).
prolog_load_context(file, FileName) :-
nb_getval('$included_file',IncFileName),
( IncFileName = [] ->
nb_getval('$consulting_file',FileName),
FileName \= []
;
FileName = IncFileName
).
prolog_load_context(module, X) :-
'$current_module'(X).
prolog_load_context(source, FileName) :-
nb_getval('$consulting_file',FileName).
prolog_load_context(stream, Stream) :-
'$fetch_stream_alias'(Stream,'$loop_stream').
prolog_load_context(term_position, Position) :-
'$fetch_stream_alias'(Stream,'$loop_stream'),
stream_position(Stream, Position).
% if the file exports a module, then we can
% be imported from any module.
'$file_loaded'(Stream, M, Imports) :-
'$file_name'(Stream, F),
'$ensure_file_loaded'(F, M, Imports).
'$ensure_file_loaded'(F, M, Imports) :-
recorded('$module','$module'(F1,NM,P),_),
recorded('$lf_loaded','$lf_loaded'(F1,_,_,_),_),
'$same_file'(F1,F), !,
'$use_preds'(Imports,P, NM, M).
'$ensure_file_loaded'(F, M, _) :-
recorded('$lf_loaded','$lf_loaded'(F1,M,_,_),_),
'$same_file'(F1,F), !.
% if the file exports a module, then we can
% be imported from any module.
'$file_unchanged'(Stream, M, Imports) :-
'$file_name'(Stream, F),
'$ensure_file_unchanged'(F, M, Imports).
'$ensure_file_unchanged'(F, M, Imports) :-
recorded('$module','$module'(F1,NM,P),_),
recorded('$lf_loaded','$lf_loaded'(F1,_,Age,_),R),
'$same_file'(F1,F), !,
'$file_is_unchanged'(F, R, Age),
'$use_preds'(Imports, P, NM, M).
'$ensure_file_unchanged'(F, M, _) :-
recorded('$lf_loaded','$lf_loaded'(F1,M,Age,_),R),
'$same_file'(F1,F), !,
'$file_is_unchanged'(F, R, Age).
'$file_is_unchanged'(F, R, Age) :-
time_file(F,CurrentAge),
((CurrentAge = Age ; Age = -1) -> true; erase(R), fail).
path(Path) :- findall(X,'$in_path'(X),Path).
'$in_path'(X) :- recorded('$path',Path,_),
atom_codes(Path,S),
( S = "" -> X = '.' ;
atom_codes(X,S) ).
add_to_path(New) :- add_to_path(New,last).
add_to_path(New,Pos) :-
atom(New), !,
'$check_path'(New,Str),
atom_codes(Path,Str),
'$add_to_path'(Path,Pos).
'$add_to_path'(New,_) :- recorded('$path',New,R), erase(R), fail.
'$add_to_path'(New,last) :- !, recordz('$path',New,_).
'$add_to_path'(New,first) :- recorda('$path',New,_).
remove_from_path(New) :- '$check_path'(New,Path),
recorded('$path',Path,R), erase(R).
'$check_path'(At,SAt) :- atom(At), !, atom_codes(At,S), '$check_path'(S,SAt).
'$check_path'([],[]).
'$check_path'([Ch],[Ch]) :- '$dir_separator'(Ch), !.
'$check_path'([Ch],[Ch,A]) :- !, integer(Ch), '$dir_separator'(A).
'$check_path'([N|S],[N|SN]) :- integer(N), '$check_path'(S,SN).
% add_multifile_predicate when we start consult
'$add_multifile'(Name,Arity,Module) :-
nb_getval('$consulting_file',File),
'$add_multifile'(File,Name,Arity,Module).
'$add_multifile'(File,Name,Arity,Module) :-
recorded('$multifile_defs','$defined'(File,Name,Arity,Module), _), !.
% print_message(warning,declaration((multifile Module:Name/Arity),ignored)).
'$add_multifile'(File,Name,Arity,Module) :-
recordz('$multifile_defs','$defined'(File,Name,Arity,Module),_), !,
fail.
'$add_multifile'(File,Name,Arity,Module) :-
recorded('$mf','$mf_clause'(File,Name,Arity,Module,Ref),R),
erase(R),
'$erase_clause'(Ref,Module),
fail.
'$add_multifile'(_,_,_,_).
% retract old multifile clauses for current file.
'$remove_multifile_clauses'(FileName) :-
recorded('$multifile_defs','$defined'(FileName,_,_,_),R1),
erase(R1),
fail.
'$remove_multifile_clauses'(FileName) :-
recorded('$mf','$mf_clause'(FileName,_,_,Module,Ref),R),
'$erase_clause'(Ref, Module),
erase(R),
fail.
'$remove_multifile_clauses'(_).
'$set_consulting_file'(user) :- !,
nb_setval('$consulting_file',user_input).
'$set_consulting_file'(user_input) :- !,
nb_setval('$consulting_file',user_input).
'$set_consulting_file'(Stream) :-
'$file_name'(Stream,F),
nb_setval('$consulting_file',F),
'$set_consulting_dir'(F).
%
% Use directory where file exists
%
'$set_consulting_dir'(F) :-
file_directory_name(F, Dir),
cd(Dir).
'$record_loaded'(Stream, M, Reconsult) :-
Stream \= user,
Stream \= user_input,
'$file_name'(Stream,F),
( recorded('$lf_loaded','$lf_loaded'(F,M,_,_),R), erase(R), fail ; true ),
time_file(F,Age),
recorda('$lf_loaded','$lf_loaded'(F,M,Age,Reconsult),_),
fail.
'$record_loaded'(_, _, _).
%
% encoding stuff: what I believe SWI does.
%
% 8-bit binaries
'$valid_encoding'(octet, 0).
% 7-bit ASCII as America originally intended
'$valid_encoding'(ascii, 2).
% Ye europeaners made it 8 bits
'$valid_encoding'(iso_latin_1, 1).
% UTF-8: default 8 bits but 80 extends to 16bits
'$valid_encoding'(utf8, 8).
% UNICODE: 16 bits throughout, the way it was supposed to be!
'$valid_encoding'(unicode_be, 16).
'$valid_encoding'(unicode_le, 32).
% whatever the system tell us to do.
'$valid_encoding'(text, 4).
'$default_encoding'(DefCode) :- nonvar(DefCode), !,
'$encoding'('$stream'(0),DefCode),
'$encoding'('$stream'(1),DefCode),
'$encoding'('$stream'(2),DefCode),
set_value('$default_encoding',DefCode).
'$default_encoding'(DefCode) :-
get_value('$default_encoding',DefCode0),
( DefCode0 == [] ->
'$get_default_encoding'(DefCode)
;
DefCode = DefCode0
).
'$set_encoding'(V) :- var(V), !,
'$do_error'(instantiation_error, encoding(V)).
'$set_encoding'(EncAtom) :-
'$valid_encoding'(EncAtom, Enc), !,
'$fetch_stream_alias'(Stream,'$loop_stream'),
'$encoding'(Stream, Enc).
'$set_encoding'(EncAtom) :-
atom(EncAtom), !,
'$do_error'(domain_error(encoding,EncAtom),encoding(EncAtom)).
'$set_encoding'(EncAtom) :-
'$do_error'(type_error(atom,V),encoding(EncAtom)).
absolute_file_name(V,Out) :- var(V), !,
'$do_error'(instantiation_error, absolute_file_name(V, Out)).
absolute_file_name(user,user) :- !.
absolute_file_name(File0,File) :-
'$absolute_file_name'(File0,[access(none),file_type(txt),file_errors(fail),solutions(first)],File,absolute_file_name(File0,File)).
'$find_in_path'(F0,F,G) :-
'$absolute_file_name'(F0,[access(read),file_type(source),file_errors(fail),solutions(first)],F,G).
absolute_file_name(File,TrueFileName,Opts) :-
var(TrueFileName), !,
absolute_file_name(File,Opts,TrueFileName).
absolute_file_name(File,Opts,TrueFileName) :-
'$absolute_file_name'(File,Opts,TrueFileName,absolute_file_name(File,Opts,TrueFileName)).
'$absolute_file_name'(File,Opts,TrueFileName,G) :- var(File), !,
'$do_error'(instantiation_error, G).
'$absolute_file_name'(File,Opts,TrueFileName, G) :-
'$process_fn_opts'(Opts,Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,G),
FoundOne = a(false),
(
'$find_in_path'(File,opts(Extensions,RelTo,Type,Access,FErrors,Expand,Debug),TrueFileName,G),
(Solutions = first -> ! ; true),
nb_setarg(1, FoundOne, true)
;
FErrors = error, FoundOne = a(false) ->
'$do_error'(existence_error(file,File),G)
).
'$process_fn_opts'(V,_,_,_,_,_,_,_,_,G) :- var(V), !,
'$do_error'(instantiation_error, G).
'$process_fn_opts'([],[],_,source,none,error,first,false,false,_) :- !.
'$process_fn_opts'([Opt|Opts],Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,G) :- !,
'$process_fn_opt'(Opt,Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,Extensions0,RelTo0,Type0,Access0,FErrors0,Solutions0,Expand0,Debug0,G),
'$process_fn_opts'(Opts,Extensions0,RelTo0,Type0,Access0,FErrors0,Solutions0,Expand0,Debug0,G).
'$process_fn_opts'(Opts,Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,G) :- !,
'$do_error'(type_error(list,T),G).
'$process_fn_opt'(Opt,Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,G) :- var(Opt), !,
'$do_error'(instantiation_error, G).
'$process_fn_opt'(extensions(Extensions),Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,_,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,G) :- !,
'$check_fn_extensions'(Extensions,G).
'$process_fn_opt'(relative_to(RelTo),Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,Extensions,_,Type,Access,FErrors,Solutions,Expand,Debug,G) :- !,
'$check_atom'(RelTo,G).
'$process_fn_opt'(access(Access),Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,Extensions,RelTo,Type,_,FErrors,Solutions,Expand,Debug,G) :- !,
'$check_atom'(Access,G).
'$process_fn_opt'(file_type(Type),Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,Extensions,RelTo,_,Access,FErrors,Solutions,Expand,Debug,G) :- !,
'$check_fn_type'(Type,G).
'$process_fn_opt'(file_errors(FErrors),Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,Extensions,RelTo,Type,Access,_,Solutions,Expand,Debug,G) :- !,
'$check_fn_errors'(FErrors,G).
'$process_fn_opt'(solutions(Solutions),Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,Extensions,RelTo,Type,Access,FErrors,_,Expand,Debug,G) :- !,
'$check_fn_solutions'(Solutions,G).
'$process_fn_opt'(expand(Expand),Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,Extensions,RelTo,Type,Access,FErrors,Solutions,_,Debug,G) :- !,
'$check_true_false'(Expand,G).
'$process_fn_opt'(verbose_file_search(Debug),Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,_,G) :- !,
'$check_true_false'(Debug,G).
'$process_fn_opt'(Opt,Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,G) :- !,
'$do_error'(domain_error(file_name_option,T),G).
'$check_fn_extensions'(V,G) :- var(V), !,
'$do_error'(instantiation_error, G).
'$check_fn_extensions'([],_) :- !.
'$check_fn_extensions'([A|L],G) :- !,
'$check_atom'(A,G),
'$check_fn_extensions'(L,G).
'$check_fn_extensions'(T,G) :- !,
'$do_error'(type_error(list,T),G).
'$check_atom'(V,G) :- var(V), !,
'$do_error'(instantiation_error, G).
'$check_atom'(A,G) :- atom(A), !.
'$check_atom'(T,G) :- !,
'$do_error'(type_error(atom,T),G).
'$check_fn_type'(V,G) :- var(V), !,
'$do_error'(instantiation_error, G).
'$check_fn_type'(txt,_) :- !.
'$check_fn_type'(prolog,_) :- !.
'$check_fn_type'(source,_) :- !.
'$check_fn_type'(executable,_) :- !.
'$check_fn_type'(qlf,_) :- !.
'$check_fn_type'(directory,_) :- !.
'$check_fn_type'(T,G) :- atom(T), !,
'$do_error'(domain_error(file_type,T),G).
'$check_fn_type'(T,G) :- !,
'$do_error'(type_error(atom,T),G).
'$check_fn_errors'(V,G) :- var(V), !,
'$do_error'(instantiation_error, G).
'$check_fn_errors'(fail,_) :- !.
'$check_fn_errors'(error,_) :- !.
'$check_fn_errors'(T,G) :- atom(T), !,
'$do_error'(domain_error(file_errors,T),G).
'$check_fn_errors'(T,G) :- !,
'$do_error'(type_error(atom,T),G).
'$check_fn_solutions'(V,G) :- var(V), !,
'$do_error'(instantiation_error, G).
'$check_fn_solutions'(first,_) :- !.
'$check_fn_solutions'(all,_) :- !.
'$check_fn_solutions'(T,G) :- atom(T), !,
'$do_error'(domain_error(solutions,T),G).
'$check_fn_solutions'(T,G) :- !,
'$do_error'(type_error(atom,T),G).
'$check_true_false'(V,G) :- var(V), !,
'$do_error'(instantiation_error, G).
'$check_true_false'(true,_) :- !.
'$check_true_false'(false,_) :- !.
'$check_true_false'(T,G) :- atom(T), !,
'$do_error'(domain_error(boolean,T),G).
'$check_true_false'(T,G) :- !,
'$do_error'(type_error(atom,T),G).
% This sequence must be followed:
% user and user_input are special;
% library(F) must check library_directories
% T(F) must check file_search_path
% all must try search in path
'$find_in_path'(user,_,user_input, _) :- !.
'$find_in_path'(user_input,_,user_input, _) :- !.
'$find_in_path'(library(F0),_,_, _) :-
% make sure library_directory is open.
\+ clause(user:library_directory(_),_),
'$system_library_directories'(D),
assert(user:library_directory(D)),
fail.
'$find_in_path'(commons(F0),_,_, _) :-
% make sure library_directory is open.
\+ clause(user:commons_directory(_),_),
'$system_commons_directories'(D),
assert(user:commons_directory(D)),
fail.
'$find_in_path'(S, Opts, NewFile, Call) :-
S =.. [Name,File0], !,
'$dir_separator'(D),
'$cat_file_name'(File0,File),
atom_codes(A,[D]),
'$extend_path_directory'(Name, A, File, Opts, NewFile, Call).
'$find_in_path'(File0,Opts,NewFile,_) :-
'$cat_file_name'(File0,File), !,
'$add_path'(File,PFile),
'$get_abs_file'(PFile,Opts,AbsFile),
'$search_in_path'(AbsFile,Opts,NewFile).
'$find_in_path'(File,_,_,Call) :-
'$do_error'(domain_error(source_sink,File),Call).
% allow paths in File Name
'$cat_file_name'(File0,File) :-
atom(File0), !,
File = File0.
'$cat_file_name'(File0,File) :-
ground(File0),
format(atom(File), '~w', [File0]).
'$get_abs_file'(File,opts(_,D0,_,_,_,_,_),AbsFile) :-
operating_system_support:true_file_name(File,D0,AbsFile).
'$search_in_path'(File,opts(Extensions,_,Type,Access,_,_,_),F) :-
'$add_extensions'(Extensions, File, F0),
'$check_file'(F0, Type, Access, F).
'$search_in_path'(File,opts(_,_,Type,Access,_,_,_),F) :-
'$add_type_extensions'(Type, File, F0),
'$check_file'(F0, Type, Access, F).
'$check_file'(F, Type, none, F) :- !.
'$check_file'(F0, Type, Access, F0) :-
access_file(F0, Access),
(Type == directory
->
exists_directory(F0)
;
true
).
'$add_extensions'([Ext|_],File,F) :-
'$mk_sure_true_ext'(Ext,NExt),
atom_concat([File,NExt],F).
'$add_extensions'([_|Extensions],File,F) :-
'$add_extensions'(Extensions,File,F).
'$mk_sure_true_ext'(Ext,NExt) :-
atom_codes(Ext,[C|L]),
C \= 0'.,
!,
atom_codes(NExt,[0'.,C|L]).
'$mk_sure_true_ext'(Ext,Ext).
'$add_type_extensions'(Type,File,F) :-
'$type_extension'(Type,Ext),
atom_concat([File,Ext],F).
'$type_extension'(txt,'').
'$type_extension'(prolog,'.yap').
'$type_extension'(prolog,'.pl').
'$type_extension'(prolog,'').
'$type_extension'(source,'.yap').
'$type_extension'(source,'.pl').
'$type_extension'(source,'').
'$type_extension'(executable,Suffix) :- '$obj_suffix'(String), atom_codes(Suffix, String).
'$type_extension'(qlf,'.qlf').
'$type_extension'(qlf,'').
'$type_extension'(directory,'').
'$add_path'(File,File).
'$add_path'(File,PFile) :-
recorded('$path',Path,_),
atom_concat([Path,File],PFile).
'$system_library_directories'(Dir) :-
getenv('YAPSHAREDIR', Dir).
'$system_library_directories'(Dir) :-
getenv('YAPCOMMONSDIR', Dir).
'$system_library_directories'(Dir) :-
get_value(system_library_directory,Dir).
'$system_library_directories'(Dir) :-
get_value(prolog_commons_directory,Dir).
'$extend_path_directory'(Name, D, File, Opts, NewFile, Call) :-
'$notrace'(user:file_search_path(Name, Dir)),
'$extend_pathd'(Dir, D, File, Opts, NewFile, Call).
'$extend_pathd'(Dir, A, File, Opts, NewFile, Call) :-
atom(Dir), !,
atom_concat([Dir,A,File],NFile),
'$find_in_path'(NFile, Opts, NewFile, Goal), !.
'$extend_pathd'(Name, A, File, Opts, OFile, Goal) :-
nonvar(Name),
Name =.. [N,P0],
atom_concat([P0,A,File],NFile),
NewName =.. [N,NFile],
'$find_in_path'(NewName, Opts, OFile, Goal).
%
% This is complicated because of embedded ifs.
%
'$if'(_,top) :- !, fail.
'$if'(Goal,_) :-
nb_getval('$if_level',Level0),
Level is Level0 + 1,
nb_setval('$if_level',Level),
nb_getval('$endif',OldEndif),
nb_getval('$if_skip_mode',Mode),
nb_setval('$endif',elif(Level,OldEndif,Mode)),
fail.
% we are in skip mode, ignore....
'$if'(Goal,_) :-
nb_getval('$endif',elif(Level, OldEndif, skip)), !,
nb_setval('$endif',endif(Level, OldEndif, skip)).
% we are in non skip mode, check....
'$if'(Goal,_) :-
('$if_call'(Goal)
->
% we will execute this branch, and later enter skip
nb_getval('$endif',elif(Level,OldEndif,Mode)),
nb_setval('$endif',endif(Level,OldEndif,Mode))
;
% we are now in skip, but can start an elif.
nb_setval('$if_skip_mode',skip)
).
'$else'(top) :- !, fail.
'$else'(_) :-
nb_getval('$if_level',0), !,
'$do_error'(context_error(no_if),(:- else)).
% we have done an if, so just skip
'$else'(_) :-
nb_getval('$endif',endif(_,_,_)), !,
nb_setval('$if_skip_mode',skip).
% we can try the elif
'$else'(_) :-
nb_getval('$if_level',Level),
nb_getval('$endif',elif(Level,OldEndif,Mode)),
nb_setval('$endif',endif(Level,OldEndif,Mode)),
nb_setval('$if_skip_mode',run).
'$elif'(_,top) :- !, fail.
'$elif'(Goal,_) :-
nb_getval('$if_level',0),
'$do_error'(context_error(no_if),(:- elif(Goal))).
% we have done an if, so just skip
'$elif'(_,_) :-
nb_getval('$endif',endif(_,_,_)), !,
nb_setval('$if_skip_mode',skip).
% we can try the elif
'$elif'(Goal,_) :-
nb_getval('$if_level',Level),
nb_getval('$endif',elif(Level,OldEndif,Mode)),
('$if_call'(Goal)
->
% we will not skip, and we will not run any more branches.
nb_setval('$endif',endif(Level,OldEndif,Mode)),
nb_setval('$if_skip_mode',run)
;
% we will (keep) on skipping
nb_setval('$if_skip_mode',skip)
).
'$elif'(_,_).
'$endif'(top) :- !, fail.
'$endif'(_) :-
% unmmatched endif.
nb_getval('$if_level',0),
'$do_error'(context_error(no_if),(:- endif)).
'$endif'(_) :-
% back to where you belong.
nb_getval('$if_level',Level),
nb_getval('$endif',Endif),
Level0 is Level-1,
nb_setval('$if_level',Level0),
arg(2,Endif,OldEndif),
arg(3,Endif,OldMode),
nb_setval('$endif',OldEndif),
nb_setval('$if_skip_mode',OldMode).
'$if_call'(G) :-
catch('$eval_if'(G), E, (print_message(error, E), fail)).
'$eval_if'(Goal) :-
expand_term(Goal,TrueGoal),
once(TrueGoal).
'$if_directive'((:- if(_))).
'$if_directive'((:- else)).
'$if_directive'((:- elif(_))).
'$if_directive'((:- endif)).
'$comp_mode'(_OldCompMode, CompMode) :-
var(CompMode), !. % just do nothing.
'$comp_mode'(OldCompMode, assert_all) :-
'$fetch_comp_status'(OldCompMode),
nb_setval('$assert_all',on).
'$comp_mode'(OldCompMode, source) :-
'$fetch_comp_status'(OldCompMode),
'$set_yap_flags'(11,1).
'$comp_mode'(OldCompMode, compact) :-
'$fetch_comp_status'(OldCompMode),
'$set_yap_flags'(11,0).
'$fetch_comp_status'(assert_all) :-
nb_getval('$assert_all',on), !.
'$fetch_comp_status'(source) :-
'$access_yap_flags'(11,1).
'$fetch_comp_status'(compact).
make :-
recorded('$lf_loaded','$lf_loaded'(F1,M,_,reconsult),_),
'$load_files'(F1, [if(changed)],make),
fail.
make.
'$file_name'(Stream,F) :-
stream_property(Stream, file_name(F)), !.
'$file_name'(user_input,user_output).
'$file_name'(user_output,user_ouput).
'$file_name'(user_error,user_error).
'$fetch_stream_alias'(OldStream,Alias) :-
stream_property(OldStream, alias(Alias)), !.
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