326 lines
12 KiB
Prolog
326 lines
12 KiB
Prolog
/*************************************************************************
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* *
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* YAP Prolog *
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* *
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* Yap Prolog was developed at NCCUP - Universidade do Porto *
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* *
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* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
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* *
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**************************************************************************
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* *
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* File: consult.yap *
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* Last rev: 8/2/88 *
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* mods: *
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* comments: Consulting Files in YAP *
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* *
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*************************************************************************/
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absolute_file_name(V,Out) :- var(V), !,
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'$do_error'(instantiation_error, absolute_file_name(V, Out)).
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absolute_file_name(user,user) :- !.
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absolute_file_name(File0,File) :-
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'$absolute_file_name'(File0,[access(none),file_type(txt),file_errors(fail),solutions(first)],File,absolute_file_name(File0,File)).
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'$full_filename'(F0,F,G) :-
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'$absolute_file_name'(F0,[access(read),file_type(source),file_errors(fail),solutions(first),expand(true)],F,G).
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% fix wrong argument order, TrueFileName should be last.
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absolute_file_name(File,TrueFileName,Opts) :-
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( var(TrueFileName) -> true ; atom(TrueFileName), TrueFileName \= [] ),
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!,
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absolute_file_name(File,Opts,TrueFileName).
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absolute_file_name(File,Opts,TrueFileName) :-
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'$absolute_file_name'(File,Opts,TrueFileName,absolute_file_name(File,Opts,TrueFileName)).
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'$absolute_file_name'(File, _Opts, _TrueFileName, G) :- var(File), !,
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'$do_error'(instantiation_error, G).
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'$absolute_file_name'(File,Opts,TrueFileName, G) :-
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'$process_fn_opts'(Opts,Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,G),
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/* our own local findall */
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nb:nb_queue(Ref),
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(
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'$find_in_path'(File,opts(Extensions,RelTo,Type,Access,FErrors,Expand,Debug),TrueFileName,G),
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nb:nb_queue_enqueue(Ref, TrueFileName),
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fail
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;
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nb:nb_queue_close(Ref, FileNames, [])
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),
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'$absolute_file_names'(Solutions, FileNames, FErrors, TrueFileName, File, G).
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'$absolute_file_names'(_Solutions, [], error, _, File, G) :- !,
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'$do_error'(existence_error(file,File),G).
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'$absolute_file_names'(Solutions, FileNames, _, TrueFileName, _, _) :-
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lists:member(TrueFileName, FileNames),
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(Solutions == first -> ! ; true).
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'$process_fn_opts'(V,_,_,_,_,_,_,_,_,G) :- var(V), !,
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'$do_error'(instantiation_error, G).
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'$process_fn_opts'([],[],_,txt,none,error,first,false,false,_) :- !.
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'$process_fn_opts'([Opt|Opts],Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,G) :- !,
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'$process_fn_opt'(Opt,Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,Extensions0,RelTo0,Type0,Access0,FErrors0,Solutions0,Expand0,Debug0,G),
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'$process_fn_opts'(Opts,Extensions0,RelTo0,Type0,Access0,FErrors0,Solutions0,Expand0,Debug0,G).
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'$process_fn_opts'(Opts,_Extensions,_RelTo,_Type,_Access,_FErrors,_Solutions,_Expand,_Debug,G) :- !,
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'$do_error'(type_error(list,Opts),G).
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'$process_fn_opt'(Opt,Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,G) :- var(Opt), !,
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'$do_error'(instantiation_error, G).
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'$process_fn_opt'(extensions(Extensions),Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,_,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,G) :- !,
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'$check_fn_extensions'(Extensions,G).
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'$process_fn_opt'(relative_to(RelTo),Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,Extensions,_,Type,Access,FErrors,Solutions,Expand,Debug,G) :- !,
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'$check_atom'(RelTo,G).
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'$process_fn_opt'(access(Access),Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,Extensions,RelTo,Type,_,FErrors,Solutions,Expand,Debug,G) :- !,
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'$check_atom'(Access,G).
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'$process_fn_opt'(file_type(Type),Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,Extensions,RelTo,_,Access,FErrors,Solutions,Expand,Debug,G) :- !,
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'$check_fn_type'(Type,G).
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'$process_fn_opt'(file_errors(FErrors),Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,Extensions,RelTo,Type,Access,_,Solutions,Expand,Debug,G) :- !,
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'$check_fn_errors'(FErrors,G).
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'$process_fn_opt'(solutions(Solutions),Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,Extensions,RelTo,Type,Access,FErrors,_,Expand,Debug,G) :- !,
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'$check_fn_solutions'(Solutions,G).
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'$process_fn_opt'(expand(Expand),Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,Extensions,RelTo,Type,Access,FErrors,Solutions,_,Debug,G) :- !,
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'$check_true_false'(Expand,G).
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'$process_fn_opt'(verbose_file_search(Debug),Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,_,G) :- !,
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'$check_true_false'(Debug,G).
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'$process_fn_opt'(Opt,Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,Extensions,RelTo,Type,Access,FErrors,Solutions,Expand,Debug,G) :- !,
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'$do_error'(domain_error(file_name_option,Opt),G).
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'$check_fn_extensions'(V,G) :- var(V), !,
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'$do_error'(instantiation_error, G).
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'$check_fn_extensions'([],_) :- !.
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'$check_fn_extensions'([A|L],G) :- !,
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'$check_atom'(A,G),
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'$check_fn_extensions'(L,G).
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'$check_fn_extensions'(T,G) :- !,
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'$do_error'(type_error(list,T),G).
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'$check_atom'(V,G) :- var(V), !,
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'$do_error'(instantiation_error, G).
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'$check_atom'(A,_G) :- atom(A), !.
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'$check_atom'(T,G) :- !,
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'$do_error'(type_error(atom,T),G).
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'$check_fn_type'(V,G) :- var(V), !,
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'$do_error'(instantiation_error, G).
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'$check_fn_type'(txt,_) :- !.
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'$check_fn_type'(prolog,_) :- !.
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'$check_fn_type'(source,_) :- !.
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'$check_fn_type'(executable,_) :- !.
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'$check_fn_type'(qlf,_) :- !.
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'$check_fn_type'(directory,_) :- !.
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'$check_fn_type'(T,G) :- atom(T), !,
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'$do_error'(domain_error(file_type,T),G).
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'$check_fn_type'(T,G) :- !,
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'$do_error'(type_error(atom,T),G).
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'$check_fn_errors'(V,G) :- var(V), !,
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'$do_error'(instantiation_error, G).
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'$check_fn_errors'(fail,_) :- !.
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'$check_fn_errors'(error,_) :- !.
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'$check_fn_errors'(T,G) :- atom(T), !,
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'$do_error'(domain_error(file_errors,T),G).
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'$check_fn_errors'(T,G) :- !,
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'$do_error'(type_error(atom,T),G).
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'$check_fn_solutions'(V,G) :- var(V), !,
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'$do_error'(instantiation_error, G).
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'$check_fn_solutions'(first,_) :- !.
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'$check_fn_solutions'(all,_) :- !.
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'$check_fn_solutions'(T,G) :- atom(T), !,
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'$do_error'(domain_error(solutions,T),G).
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'$check_fn_solutions'(T,G) :- !,
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'$do_error'(type_error(atom,T),G).
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'$check_true_false'(V,G) :- var(V), !,
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'$do_error'(instantiation_error, G).
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'$check_true_false'(true,_) :- !.
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'$check_true_false'(false,_) :- !.
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'$check_true_false'(T,G) :- atom(T), !,
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'$do_error'(domain_error(boolean,T),G).
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'$check_true_false'(T,G) :- !,
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'$do_error'(type_error(atom,T),G).
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% This sequence must be followed:
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% user and user_input are special;
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% library(F) must check library_directories
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% T(F) must check file_search_path
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% all must try search in path
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'$find_in_path'(user,_,user_input, _) :- !.
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'$find_in_path'(user_input,_,user_input, _) :- !.
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'$find_in_path'(commons(D),_,_, _) :-
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% make sure library_directory is open.
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\+ clause(user:commons_directory(_),_),
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'$system_commons_directories'(D),
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assert(user:commons_directory(D)),
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fail.
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'$find_in_path'(S, Opts, NewFile, Call) :-
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S =.. [Name,File0],
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'$cat_file_name'(File0,File1), !,
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'$expand_file_name'(File1, File),
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'$dir_separator'(D),
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atom_codes(A,[D]),
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'$extend_path_directory'(Name, A, File, Opts, NewFile, Call).
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'$find_in_path'(File0,Opts,NewFile,_) :-
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'$cat_file_name'(File0,File1), !,
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'$expand_file_name'(File1, File),
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'$add_path'(File,PFile),
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'$get_abs_file'(PFile,Opts,AbsFile),
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'$search_in_path'(AbsFile,Opts,NewFile).
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'$find_in_path'(File,_,_,Call) :-
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'$do_error'(domain_error(source_sink,File),Call).
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% allow paths in File Name
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'$cat_file_name'(File0,File) :-
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atom(File0), !,
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File = File0.
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'$cat_file_name'(Atoms, File) :-
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'$to_list_of_atoms'(Atoms, List, []),
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atom_concat(List, File).
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'$to_list_of_atoms'(V, _, _) :- var(V), !, fail.
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'$to_list_of_atoms'(Atom, [Atom|L], L) :- atom(Atom), !.
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'$to_list_of_atoms'(Atoms, L1, LF) :-
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Atoms =.. [A,As,Bs],
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atom_codes(A,[D]),
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'$dir_separator'(D),
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'$to_list_of_atoms'(As, L1, [A|L2]),
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'$to_list_of_atoms'(Bs, L2, LF).
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'$get_abs_file'(File,opts(_,RelTo,_,_,_,Expand,_),AbsFile) :-
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(
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nonvar(RelTo)
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->
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( is_absolute_file_name(File) ->
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ActualFile = File
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;
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'$dir_separator'(D),
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atom_codes(DA,[D]),
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atom_concat([RelTo, DA, File], ActualFile)
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)
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;
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ActualFile = File
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),
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'$swi_current_prolog_flag'(file_name_variables, OldF),
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'$swi_set_prolog_flag'(file_name_variables, Expand),
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(
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'$absolute_file_name'(ActualFile,AbsFile)
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->
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'$swi_set_prolog_flag'(file_name_variables, OldF)
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;
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'$swi_set_prolog_flag'(file_name_variables, OldF),
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fail
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).
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'$search_in_path'(File,opts(Extensions,_,Type,Access,_,_,_),F) :-
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'$add_extensions'(Extensions, File, F0),
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'$check_file'(F0, Type, Access, F).
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'$search_in_path'(File,opts(_,_,Type,Access,_,_,_),F) :-
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'$add_type_extensions'(Type, File, F0),
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'$check_file'(F0, Type, Access, F).
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'$check_file'(F, _Type, none, F) :- !.
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'$check_file'(F0, Type, Access, F0) :-
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access_file(F0, Access),
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(Type == directory ->
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exists_directory(F0)
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;
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\+ exists_directory(F0) % if it has a type cannot be a directory.
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).
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'$add_extensions'([Ext|_],File,F) :-
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'$mk_sure_true_ext'(Ext,NExt),
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atom_concat([File,NExt],F).
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'$add_extensions'([_|Extensions],File,F) :-
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'$add_extensions'(Extensions,File,F).
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'$mk_sure_true_ext'(Ext,NExt) :-
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atom_codes(Ext,[C|L]),
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C \= 0'.,
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!,
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atom_codes(NExt,[0'.,C|L]).
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'$mk_sure_true_ext'(Ext,Ext).
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'$add_type_extensions'(Type,File,F) :-
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( Type == source -> NType = prolog ; NType = Type ),
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user:prolog_file_type(Ext, NType),
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atom_concat([File,'.',Ext],F).
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'$add_type_extensions'(_,File,File).
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'$add_path'(File,File) :-
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'$dir_separator'(D),
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atom_codes(DA,[D]),
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sub_atom(File, 0, 1, _, DA), !.
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'$add_path'(File,File).
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'$add_path'(File,PFile) :-
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recorded('$path',Path,_),
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atom_concat([Path,File],PFile).
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'$system_library_directories'(Dir) :-
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getenv('YAPSHAREDIR', Dirs),
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'$split_by_sep'(0, 0, Dirs, Dir).
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'$system_library_directories'(Dir) :-
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getenv('YAPCOMMONSDIR', Dirs),
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'$split_by_sep'(0, 0, Dirs, Dir).
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'$system_library_directories'(Dir) :-
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get_value(system_library_directory,Dir).
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'$system_library_directories'(Dir) :-
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get_value(prolog_commons_directory,Dir).
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'$split_by_sep'(Start, Next, Dirs, Dir) :-
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'$swi_current_prolog_flag'(windows, true), !,
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'$split_by_sep'(Start, Next, Dirs, ';', Dir).
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'$split_by_sep'(Start, Next, Dirs, Dir) :-
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'$split_by_sep'(Start, Next, Dirs, ':', Dir).
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'$split_by_sep'(Start, Next, Dirs, Sep, Dir) :-
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sub_atom(Dirs, Next, 1, _, Let), !,
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'$continue_split_by_sep'(Let, Start, Next, Dirs, Sep, Dir).
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'$split_by_sep'(Start, Next, Dirs, _Sep, Dir) :-
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Next > Start,
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Len is Next-Start,
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sub_atom(Dirs, Start, Len, _, Dir).
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% closed a directory
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'$continue_split_by_sep'(Sep, Start, Next, Dirs, Sep, Dir) :-
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Sz is Next-Start,
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Sz > 0,
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sub_atom(Dirs, Start, Sz, _, Dir).
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% next dir
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'$continue_split_by_sep'(Sep , _Start, Next, Dirs, Sep, Dir) :- !,
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N1 is Next+1,
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'$split_by_sep'(N1, N1, Dirs, Dir).
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% same dir
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'$continue_split_by_sep'(_Let, Start, Next, Dirs, Sep, Dir) :-
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N1 is Next+1,
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'$split_by_sep'(Start, N1, Dirs, Sep, Dir).
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'$extend_path_directory'(_Name, D, File, _Opts, File, Call) :-
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is_absolute_file_name(File), !.
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'$extend_path_directory'(Name, D, File, Opts, NewFile, Call) :-
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user:file_search_path(Name, IDirs),
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( atom(IDirs) ->
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'$split_by_sep'(0, 0, IDirs, Dir)
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;
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Dir = IDirs
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),
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'$extend_pathd'(Dir, D, File, Opts, NewFile, Call).
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'$extend_pathd'(Dir, A, File, Opts, NewFile, Goal) :-
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atom(Dir), !,
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'$add_file_to_dir'(Dir,A,File,NFile),
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'$find_in_path'(NFile, Opts, NewFile, Goal), !.
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'$extend_pathd'(Name, A, File, Opts, OFile, Goal) :-
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nonvar(Name),
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Name =.. [N,P0],
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'$add_file_to_dir'(P0,A,File,NFile),
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NewName =.. [N,NFile],
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'$find_in_path'(NewName, Opts, OFile, Goal).
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'$add_file_to_dir'(P0,A,Atoms,NFile) :-
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atom_concat([P0,A,Atoms],NFile).
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