96 lines
2.9 KiB
Prolog
Executable File
96 lines
2.9 KiB
Prolog
Executable File
/*************************************************************************
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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: protect.yap *
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* Last rev: *
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* mods: *
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* comments: protecting the system functions *
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* *
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*************************************************************************/
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/**
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* @file protect.yap
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*/
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:- system_module( '$_protect', [], ['$protect'/0]).
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/**
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* * @addtogroup ProtectCore Freeze System Configuration
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* @{
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* @ingroup YAPControl
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*
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* This protects current code from further changes
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* and also makes it impossible for some predicates to be seen
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* in user-space.
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*
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* Algorithm:
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* - fix system modules
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* - fix system predicates
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* - hide atoms with `$`
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*/
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prolog:'$protect' :-
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'$all_current_modules'(M),
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( sub_atom(M,0,1,_, '$') ; M= prolog; M= system ),
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new_system_module( M ),
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fail.
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prolog:'$protect' :-
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'$current_predicate'(Name,M,P,_),
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'$is_system_module'(M),
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functor(P,Name,Arity),
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'$new_system_predicate'(Name,Arity,M),
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sub_atom(Name,0,1,_, '$'),
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functor(P,Name,Arity),
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'$stash_predicate'(P,M),
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% '$hide_predicate'(P,M),
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fail.
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prolog:'$protect' :-
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current_atom(Name),
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sub_atom(Name,0,1,_, '$'),
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\+ '$visible'(Name),
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hide_atom(Name),
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fail.
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prolog:'$protect' :-
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recorded('$module','$module'(_F,_DonorM,_SourceF, _AllExports, _Line), R),erase(R), fail.
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prolog:'$protect' :-
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recorded('$source_file','$source_file'( _F, _Age, _M), R),erase(R), fail.
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prolog:'$protect' :-
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recorded('$lf_loaded','$lf_loaded'( _F, _M, _Reconsult, _UserFile, _OldF, _Line, _Opts), R),erase(R), fail.
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prolog:'$protect'.
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/*
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% hide all atoms who start by '$'
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'$visible'('$'). /* not $VAR */
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'$visible'('$VAR'). /* not $VAR */
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'$visible'('$dbref'). /* not stream position */
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'$visible'('$stream'). /* not $STREAM */
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'$visible'('$stream_position'). /* not stream position */
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'$visible'('$hacks').
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'$visible'('$source_location').
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'$visible'('$messages').
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'$visible'('$push_input_context').
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'$visible'('$pop_input_context').
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'$visible'('$set_source_module').
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'$visible'('$declare_module').
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'$visible'('$store_clause').
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'$visible'('$skip_list').
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'$visible'('$win_insert_menu_item').
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'$visible'('$set_predicate_attribute').
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'$visible'('$parse_quasi_quotations').
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'$visible'('$quasi_quotation').
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'$visible'('$qq_open').
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'$visible'('$live').
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'$visible'('$init_prolog').
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'$visible'('$x_yap_flag' ).
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%% @}
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