97 lines
2.8 KiB
Prolog
97 lines
2.8 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: flags.yap *
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* Last rev: *
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* mods: *
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* comments: controlling YAP *
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* *
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*************************************************************************/
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:- system_module( '$_flags', [create_prolog_flag/3,
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current_prolog_flag/2,
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no_source/0,
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prolog_flag/2,
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prolog_flag/3,
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set_prolog_flag/2,
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source/0,
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source_mode/2,
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yap_flag/2,
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yap_flag/3], []).
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'$adjust_language'(cprolog) :-
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% '$switch_log_upd'(0),
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'$syntax_check_mode'(_,off),
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'$syntax_check_single_var'(_,off),
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'$syntax_check_discontiguous'(_,off),
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'$syntax_check_multiple'(_,off),
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'$swi_set_prolog_flag'(character_escapes, false), % disable character escapes.
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'$set_yap_flags'(14,1),
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'$set_fpu_exceptions'(true),
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unknown(_,fail).
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'$adjust_language'(sicstus) :-
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'$switch_log_upd'(1),
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leash(full),
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'$syntax_check_mode'(_,on),
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'$syntax_check_single_var'(_,on),
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'$syntax_check_discontiguous'(_,on),
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'$syntax_check_multiple'(_,on),
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'$transl_to_on_off'(X1,on),
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'$set_yap_flags'(5,X1),
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'$force_char_conversion',
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'$set_yap_flags'(14,0),
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% CHARACTER_ESCAPE
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'$swi_set_prolog_flag'(character_escapes, true), % disable character escapes.
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'$set_fpu_exceptions'(true),
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'$swi_set_prolog_flag'(fileerrors, true),
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unknown(_,error).
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'$adjust_language'(iso) :-
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'$switch_log_upd'(1),
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style_check(all),
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fileerrors,
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'$transl_to_on_off'(X1,on),
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% CHAR_CONVERSION
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'$set_yap_flags'(5,X1),
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'$force_char_conversion',
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% ALLOW_ASSERTING_STATIC
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'$set_yap_flags'(14,0),
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% CHARACTER_ESCAPE
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'$swi_set_prolog_flag'(character_escapes, true), % disable character escapes.
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'$set_fpu_exceptions'(true),
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unknown(_,error).
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/** @pred create_prolog_flag(+ _Flag_,+ _Value_,+ _Options_)
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Create a new YAP Prolog flag. _Options_ include
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* `type(+_Type_)` with _Type_ one of `boolean`, `integer`, `float`, `atom`
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and `term` (that is, any ground term)
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* `access(+_Access_)` with _Access_ one of `read_only` or `read_write`
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* `keeep(+_Keep_) protect existing flag.
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*/
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create_prolog_flag(Name, Value, Options) :-
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'$flag_domain_from_value'( Value, Type ),
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'$create_prolog_flag'(Name, Value, [type(Type)|Options]).
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'$flag_domain_from_value'(true, boolean) :- !.
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'$flag_domain_from_value'(false, boolean) :- !.
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'$flag_domain_from_value'(Value, integer) :- integer(Value), !.
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'$flag_domain_from_value'(Value, float) :- float(Value), !.
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'$flag_domain_from_value'(Value, atom) :- atom(Value), !.
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'$flag_domain_from_value'(_, term).
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/**
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@}
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*/
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