/* Part of SWI-Prolog Author: Jan Wielemaker E-mail: J.Wielemaker@vu.nl WWW: http://www.swi-prolog.org Copyright (c) 2019-2020, VU University Amsterdam CWI, Amsterdam All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ :- module(machine, [ gc_heap/0, trimcore/0, abolish_table_info/0, close_open_tables/1, % ? str_cat/3, parsort/4, % +List, +Spec, +Dupl, -Sorted term_type/2, xsb_expand_file_name/2, % +File, -Expanded expand_filename_no_prepend/2, % FileName, -ExpandedName parse_filename/4, % +FileName, -Dir, -Base, -Extension conset/2, % +Term, +Value conget/2, % +Term, -Value slash/1, % -OSDirSlash xsb_backtrace/1, % -Backtrace xwam_state/2 % +Id, -Value ]). :- use_module(library(debug)). :- use_module(library(error)). :- use_module(library(prolog_stack)). %! gc_heap % % Explicitly invoke heap garbage collection. gc_heap :- garbage_collect. %! trimcore % % Trim the stacks. trimcore :- trim_stacks. %! abolish_table_info % % Undocumented in the XSB manual. abolish_table_info. %! close_open_tables(?Arg) % % Undocumented in the XSB manual. Tables are always closed on % exceptions, so it is unclear what this should do? close_open_tables(_). %! str_cat(+Atom1, +Atom2, -Atom3) str_cat(A, B, AB) :- must_be(atom, A), must_be(atom, B), atom_concat(A, B, AB). %! parsort(+List, +Order, +Dupl, -Sorted) is det. % % parsort/4 is a very general sorting routine. parsort(_List, Spec, _Dupl, _Sorted) :- var(Spec), !, uninstantiation_error(Spec). parsort(_List, _Spec, Dupl, _Sorted) :- var(Dupl), !, uninstantiation_error(Dupl). parsort(List, asc, 0, Sorted) :- !, sort(0, @=<, List, Sorted). parsort(List, asc, _, Sorted) :- !, sort(0, @<, List, Sorted). parsort(List, [], 0, Sorted) :- !, sort(0, @=<, List, Sorted). parsort(List, [], _, Sorted) :- !, sort(0, @<, List, Sorted). parsort(List, desc, 0, Sorted) :- !, sort(0, @>=, List, Sorted). parsort(List, desc, _, Sorted) :- !, sort(0, @>, List, Sorted). parsort(List, SortSpec, Dupl, Sorted) :- must_be(list, SortSpec), reverse(SortSpec, Rev), parsort_(Rev, Dupl, List, Sorted). parsort_([], _, List, List). parsort_([H|T], Dupl, List0, List) :- parsort_1(H, Dupl, List0, List1), parsort_(T, Dupl, List1, List). parsort_1(asc(I), 0, List, Sorted) :- !, sort(I, @=<, List, Sorted). parsort_1(asc(I), _, List, Sorted) :- !, sort(I, @<, List, Sorted). parsort_1(desc(I), 0, List, Sorted) :- !, sort(I, @>=, List, Sorted). parsort_1(desc(I), _, List, Sorted) :- !, sort(I, @>, List, Sorted). parsort_1(Spec, _, _, _) :- domain_error(parsort_spec, Spec). %! term_type(+Term, -Type:integer) % % Emulation of internal XSB predicate term_type(Term, Type) :- ( atom(Term) -> Type = 5 ; compound(Term) -> ( Term = [_|_] -> Type = 3 ; Type = 1 ) ; integer(Term) -> Type = 2 ; float(Term) -> Type = 6 ; var(Term) -> Type = 0 ; assertion(fail) ). /******************************* * FILES * *******************************/ %! xsb_expand_file_name(+File, -Expanded) % % xsb_expand_file_name(File, Expanded) :- absolute_file_name(File, Expanded, [expand(true)]). %! expand_filename_no_prepend(+FileName, -ExpandedName) % % expand_filename_no_prepend(File, Expanded) :- expand_file_name(File, Absolute), working_directory(Dir0, Dir0), ensure_slash(Dir0, Dir), ( atom_concat(Dir, Ex0, Absolute) -> Expanded = Ex0 ; Expanded = Absolute ). %! parse_filename(+FileName, -Dir, -Base, -Extension) % % parse_filename(FileName, Dir, Base, Extension) :- sub_atom(FileName, 0, _, _, '~'), !, expand_file_name(FileName, Absolute), parse_filename_2(Absolute, Dir, Base, Extension). parse_filename(FileName, Dir, Base, Extension) :- parse_filename_2(FileName, Dir, Base, Extension). parse_filename_2(FileName, Dir, Base, Extension) :- file_directory_name(FileName, Dir0), ( Dir0 == '.' -> Dir = '' ; ensure_slash(Dir0, Dir) ), file_base_name(FileName, File), file_name_extension(Base, Extension, File). ensure_slash(Dir, DirS) :- sub_atom(Dir, _, _, 0, '/'), !, DirS = Dir. ensure_slash(Dir, DirS) :- atom_concat(Dir, '/', DirS). %! conset(+Term, +Value) is det. %! conget(+Term, -Value) is det. % % Cheap set/get integer value associated with an atom. Seems this is a % subset of what SWI-Prolog flags can do. conset(Name, Value) :- set_flag(Name, Value). conget(Name, Value) :- get_flag(Name, Value). %! slash(-Slash) % % Return the directory separator for the platform slash(Slash) :- ( current_prolog_flag(windows, true) -> Slash = '\\' ; Slash = '/' ). %! xsb_backtrace(-Backtrace) % % Upon success Backtrace is bound to a structure indicating the % forward continuations for a point of execution. This structure % should be treated as opaque. xsb_backtrace(Backtrace) :- get_prolog_backtrace(25, Backtrace). %! xwam_state(+Id, -Value) % % Low-level query. Used by the XSB test suite. xwam_state(2, DelayReg) :- !, ( '$tbl_delay_list'([_|_]) -> DelayReg = 1 ; DelayReg = 0 ). xwam_state(Id, _Value) :- domain_error(xwam_state, Id).