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    1/*  Part of SWI-Prolog
    2
    3    WWW:           http://www.swi-prolog.org
    4    Copyright (c)  2020-2021, SWI-Prolog Solutions b.v.
    5    All rights reserved.
    6
    7    Redistribution and use in source and binary forms, with or without
    8    modification, are permitted provided that the following conditions
    9    are met:
   10
   11    1. Redistributions of source code must retain the above copyright
   12       notice, this list of conditions and the following disclaimer.
   13
   14    2. Redistributions in binary form must reproduce the above copyright
   15       notice, this list of conditions and the following disclaimer in
   16       the documentation and/or other materials provided with the
   17       distribution.
   18
   19    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   20    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   21    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
   22    FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
   23    COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   24    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   25    BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   26    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   27    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   29    ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   30    POSSIBILITY OF SUCH DAMAGE.
   31*/
   32
   33:- module(sicstus4,
   34	  [ nonmember/2,		% ?Element, ?List
   35	    statistics/2,		% ?Key, ?Value
   36	    op(1100, xfy, (do))
   37	  ]).   38:- use_module(library(arithmetic)).   39:- reexport(sicstus,
   40	    [ (block)/1,
   41	      if/3,
   42	      use_module/3,
   43	      bb_put/2,
   44	      bb_get/2,
   45	      bb_delete/2,
   46	      bb_update/3,
   47	      is_mutable/1 as mutable,
   48	      create_mutable/2,
   49	      get_mutable/2,
   50	      update_mutable/2,
   51	      sicstus_is_readable_stream/1,
   52	      read_line/1,
   53	      read_line/2,
   54	      trimcore/0,
   55	      prolog_flag/3,
   56	      op(1150, fx, (block)),
   57	      op(1150, fx, (mode)),
   58	      op(900, fy, (spy)),
   59	      op(900, fy, (nospy))
   60	    ]).   61
   62/** <module> SICStus 4 compatibility library
   63
   64This library is intended to be activated using the directive below in
   65files that are designed for use with SICStus Prolog 4. The changes are in
   66effect until the end of the file and in each file loaded from this file.
   67
   68    ==
   69    :- expects_dialect(sicstus4).
   70    ==
   71
   72This library only provides compatibility with version 4 of SICStus Prolog.
   73For SICStus Prolog 3 compatibility, use library(dialect/sicstus) instead.
   74
   75@tbd	The dialect-compatibility packages are developed in a
   76	`demand-driven' fashion. Please contribute to this package.
   77*/
   78
   79% Note: Although the do operator is declared here, do loops currently
   80% aren't emulated by library(dialect/sicstus4).
   81:- op(1100, xfy, user:(do)).   82
   83
   84		 /*******************************
   85		 *	    LIBRARY SETUP	*
   86		 *******************************/
   87
   88%%	push_sicstus4_library
   89%
   90%	Pushes searching for dialect/sicstus4 in front of every library
   91%	directory that contains such as sub-directory.
   92
   93push_sicstus4_library :-
   94	(   absolute_file_name(library(dialect/sicstus4), Dir,
   95			       [ file_type(directory),
   96				 access(read),
   97				 solutions(all),
   98				 file_errors(fail)
   99			       ]),
  100	    asserta((user:file_search_path(library, Dir) :-
  101		    prolog_load_context(dialect, sicstus4))),
  102	    fail
  103	;   true
  104	).
  105
  106
  107:- push_sicstus4_library.  108
  109
  110%%	setup_dialect
  111%
  112%	Further dialect initialization.
  113%
  114%	sicstus4 currently performs the same initialization
  115%	as the sicstus (SICStus 3) dialect.
  116
  117setup_dialect :- sicstus:setup_dialect.
  118
  119
  120		 /*******************************
  121		 *	  LIBRARY MODULES	*
  122		 *******************************/
  123
  124%%	rename_module(?SICStus4Module, ?RenamedSICStus4Module) is nondet.
  125%
  126%	True if RenamedSICStus4Module is the  name  that  we use for the
  127%	SICStus 4 native module SICStus4Module. We do this in places where
  128%	the module-name conflicts. All explicitly qualified goals are
  129%	mapped to the SICStus 4 equivalent of the module.
  130
  131:- multifile
  132	rename_module/2.  133
  134system:goal_expansion(M:Goal, SicstusM:Goal) :-
  135	atom(M),
  136	rename_module(M, SicstusM),
  137	prolog_load_context(dialect, sicstus4).
  138
  139
  140% SICStus 4 copy_term/2 behaves like SWI copy_term_nat/2.
  141user:goal_expansion(copy_term(Term, Copy), copy_term_nat(Term, Copy)) :-
  142	prolog_load_context(dialect, sicstus4).
  143
  144
  145%%	nonmember(?Element, ?List) is semidet.
  146%
  147%	True if Element doesn't unify with any element in List.
  148%	No variables are bound.
  149
  150nonmember(Element, List) :- \+ memberchk(Element, List).
  151
  152% As of SICStus 4.6.0, the following statistics/2 keys are still missing:
  153% Introduced in SICStus 4.0:
  154% * defragmentation
  155% Introduced in SICStus 4.1:
  156% * choice_used, choice_free
  157% * defrag_count, defrag_time
  158% * dpgc_count, dpgc_time
  159% * memory_culprit
  160% * memory_buckets
  161% Introduced in SICStus 4.3:
  162% * jit_count, jit_time
  163
  164statistics(total_runtime, Stats) :- !, system:statistics(runtime, Stats).
  165% The following keys were introduced with SICStus Prolog 4.1.
  166statistics(memory_used, BytesUsed) :- !, system:statistics(memory, [BytesUsed, _]).
  167statistics(memory_free, BytesFree) :- !, system:statistics(memory, [_, BytesFree]).
  168statistics(global_stack_used, BytesUsed) :- !, system:statistics(global_stack, [BytesUsed, _]).
  169statistics(global_stack_free, BytesFree) :- !, system:statistics(global_stack, [_, BytesFree]).
  170statistics(local_stack_used, BytesUsed) :- !, system:statistics(local_stack, [BytesUsed, _]).
  171statistics(local_stack_free, BytesFree) :- !, system:statistics(local_stack, [_, BytesFree]).
  172statistics(trail_used, BytesUsed) :- !, system:statistics(trail, [BytesUsed, _]).
  173statistics(trail_free, BytesFree) :- !, system:statistics(trail, [_, BytesFree]).
  174statistics(atoms_used, BytesUsed) :- !, system:statistics(atom_space, BytesUsed).
  175statistics(atoms_nbused, CountUsed) :- !, system:statistics(atoms, CountUsed).
  176statistics(atoms_nbfree, CountFree) :- !, CountFree = 0.
  177statistics(ss_global, Count) :- !, system:statistics(stack_shifts, [Count, _, _]).
  178statistics(ss_local, Count) :- !, system:statistics(stack_shifts, [_, Count, _]).
  179statistics(ss_time, Time) :- !, system:statistics(stack_shifts, [_, _, Time]).
  180statistics(gc_count, Count) :- !, system:statistics(garbage_collection, [Count, _, _|_]).
  181statistics(gc_freed, BytesFreed) :- !, system:statistics(garbage_collection, [_, BytesFreed, _|_]).
  182statistics(gc_time, Time) :- !, system:statistics(garbage_collection, [_, _, Time|_]).
  183statistics(agc_count, Count) :- !, system:statistics(atom_garbage_collection, [Count, _, _]).
  184statistics(agc_freed, BytesFreed) :- !, system:statistics(atom_garbage_collection, [_, BytesFreed, _]).
  185statistics(agc_time, Time) :- !, system:statistics(atom_garbage_collection, [_, _, Time]).
  186statistics(dcgc_count, Count) :- !, system:statistics(clause_garbage_collection, [Count, _, _]).
  187statistics(dcgc_time, Time) :- !, system:statistics(clause_garbage_collection, [_, _, Time]).
  188
  189:- use_module(sicstus, [statistics/2 as sicstus3_statistics]).  190statistics(Keyword, Value) :- sicstus3_statistics(Keyword, Value).
  191
  192% Provide (\)/2 as arithmetic function.  Ideally, we should be able to
  193% bind multiple names to built-in functions.  This is rather slow.  We
  194% could also consider adding \ internally, but not turning it into an
  195% operator.
  196
  197:- arithmetic_function(user:(\)/2).  198
  199user:(\(X,Y,R)) :-
  200	R is xor(X,Y)