2011-04-30 01:16:40 +01:00
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/*************************************************************************
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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: dbload.yap *
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* Last rev: 8/2/88 *
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* mods: *
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* comments: Compact Loading of Facts in YAP *
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* *
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*************************************************************************/
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:- module('$db_load',
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[]).
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:- dynamic dbloading/6, dbprocess/2.
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prolog:load_db(Fs) :-
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'$current_module'(M0),
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prolog_flag(agc_margin,Old,0),
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dbload(Fs,M0,load_db(Fs)),
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load_facts,
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prolog_flag(agc_margin,_,Old),
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clean_up.
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dbload(Fs, _, G) :-
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var(Fs),
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'$do_error'(instantiation_error,G).
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dbload([], _, _).
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dbload([F|Fs], M0, G) :-
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dbload(F, M0, G),
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dbload(Fs, M0, G).
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dbload(M:F, _M0, G) :-
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dbload(F, M, G).
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dbload(F, M0, G) :-
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atom(F), !,
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do_dbload(F, M0, G).
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dbload(F, _, G) :-
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'$do_error'(type_error(atom,F),G).
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do_dbload(F0, M0, G) :-
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2011-06-21 22:36:09 +01:00
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'$full_filename'(F0,F,G),
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2011-04-30 01:16:40 +01:00
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assert(dbprocess(F, M0)),
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open(F, read, R),
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check_dbload_stream(R, M0),
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close(R).
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check_dbload_stream(R, M0) :-
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repeat,
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read(R,T),
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( T = end_of_file -> !;
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dbload_count(T, M0),
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fail
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).
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dbload_count(T0, M0) :-
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get_module(T0,M0,T,M),
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functor(T,Na,Arity),
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% dbload_check_term(T),
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(
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dbloading(Na,Arity,M,_,NaAr,_) ->
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nb_getval(NaAr,I0),
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I is I0+1,
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nb_setval(NaAr,I)
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;
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atomic_concat([Na,'__',Arity,'__',M],NaAr),
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assert(dbloading(Na,Arity,M,T,NaAr,0)),
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nb_setval(NaAr,1)
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).
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get_module(M1:T0,_,T,M) :- !,
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get_module(T0, M1, T , M).
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get_module(T,M,T,M).
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load_facts :-
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retract(dbloading(Na,Arity,M,T,NaAr,_)),
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nb_getval(NaAr,Size),
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dbload_get_space(T, M, Size, Handle),
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assertz(dbloading(Na,Arity,M,T,NaAr,Handle)),
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nb_setval(NaAr,0),
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fail.
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load_facts :-
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dbprocess(F, M),
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open(F, read, R),
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dbload_add_facts(R, M),
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close(R),
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fail.
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load_facts.
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dbload_add_facts(R, M) :-
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repeat,
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read(R,T),
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( T = end_of_file -> !;
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dbload_add_fact(T, M),
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fail
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).
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dbload_add_fact(T0, M0) :-
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get_module(T0,M0,T,M),
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functor(T,Na,Arity),
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Na \= gene_product,
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dbloading(Na,Arity,M,_,NaAr,Handle),
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nb_getval(NaAr,I0),
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I is I0+1,
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nb_setval(NaAr,I),
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dbassert(T,Handle,I0).
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clean_up :-
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retractall(dbloading(_,_,_,_,_,_)),
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retractall(dbprocess(_,_)),
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fail.
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clean_up.
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