216 lines
6.2 KiB
Prolog
216 lines
6.2 KiB
Prolog
/* $Id$
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Part of CHR (Constraint Handling Rules)
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Author: Tom Schrijvers
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E-mail: Tom.Schrijvers@cs.kuleuven.be
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WWW: http://www.swi-prolog.org
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Copyright (C): 2003-2004, K.U. Leuven
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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As a special exception, if you link this library with other files,
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compiled with a Free Software compiler, to produce an executable, this
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library does not by itself cause the resulting executable to be covered
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by the GNU General Public License. This exception does not however
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invalidate any other reasons why the executable file might be covered by
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the GNU General Public License.
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*/
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:- module(chr,
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[ chr_compile_step1/2 % +CHRFile, -PlFile
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, chr_compile_step2/2 % +CHRFile, -PlFile
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, chr_compile_step3/2 % +CHRFile, -PlFile
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, chr_compile_step4/2 % +CHRFile, -PlFile
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, chr_compile/3
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]).
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%% SWI begin
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% vsc:
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:- if(current_prolog_flag(dialect, yap)).
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:- prolog_load_context(directory,D), add_to_path(D).
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:- prolog_load_context(directory,D), atom_concat(D, '/../../library', D1), assert(user:library_directory(D1)).
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:- prolog_load_context(directory,D), atom_concat(D, '/../../swi/library', D1), assert(user:library_directory(D1)).
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:- else.
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:- use_module(library(listing)). % portray_clause/2
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:- endif.
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:- expects_dialect(swi).
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%% SWI end
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:- include(chr_op).
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/*******************************
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* FILE-TO-FILE COMPILER *
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*******************************/
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% chr_compile(+CHRFile, -PlFile)
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%
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% Compile a CHR specification into a Prolog file
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chr_compile_step1(From, To) :-
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use_module('chr_translate_bootstrap.pl'),
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chr_compile(From, To, informational).
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chr_compile_step2(From, To) :-
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use_module('chr_translate_bootstrap1.pl'),
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chr_compile(From, To, informational).
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chr_compile_step3(From, To) :-
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use_module('chr_translate_bootstrap2.pl'),
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chr_compile(From, To, informational).
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chr_compile_step4(From, To) :-
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use_module('chr_translate.pl'),
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chr_compile(From, To, informational).
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chr_compile(From, To, MsgLevel) :-
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print_message(MsgLevel, chr(start(From))),
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read_chr_file_to_terms(From,Declarations),
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% read_file_to_terms(From, Declarations,
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% [ module(chr) % get operators from here
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% ]),
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print_message(silent, chr(translate(From))),
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chr_translate(Declarations, Declarations1),
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insert_declarations(Declarations1, NewDeclarations),
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print_message(silent, chr(write(To))),
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writefile(To, From, NewDeclarations),
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print_message(MsgLevel, chr(end(From, To))).
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%% SWI begin
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specific_declarations([ (:- use_module('chr_runtime')),
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(:- style_check(-discontiguous)),
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(:- style_check(-singleton)),
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(:- style_check(-no_effect))
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| Tail
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], Tail).
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%% SWI end
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%% SICStus begin
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%% specific_declarations([(:- use_module('chr_runtime')),
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%% (:-use_module(chr_hashtable_store)),
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%% (:- use_module('hpattvars')),
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%% (:- use_module('b_globval')),
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%% (:- use_module('hprolog')), % needed ?
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%% (:- set_prolog_flag(discontiguous_warnings,off)),
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%% (:- set_prolog_flag(single_var_warnings,off))|Tail], Tail).
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%% SICStus end
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insert_declarations(Clauses0, Clauses) :-
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specific_declarations(Decls,Tail),
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(Clauses0 = [(:- module(M,E))|FileBody] ->
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Clauses = [ (:- module(M,E))|Decls],
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Tail = FileBody
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;
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Clauses = Decls,
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Tail = Clauses0
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).
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% writefile(+File, +From, +Desclarations)
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%
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% Write translated CHR declarations to a File.
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writefile(File, From, Declarations) :-
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open(File, write, Out),
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writeheader(From, Out),
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writecontent(Declarations, Out),
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close(Out).
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writecontent([], _).
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writecontent([D|Ds], Out) :-
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portray_clause(Out, D), % SWI-Prolog
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writecontent(Ds, Out).
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writeheader(File, Out) :-
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format(Out, '/* Generated by CHR bootstrap compiler~n', []),
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format(Out, ' From: ~w~n', [File]),
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format_date(Out),
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format(Out, ' DO NOT EDIT. EDIT THE CHR FILE INSTEAD~n', []),
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format(Out, '*/~n~n', []).
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%% SWI begin
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format_date(Out) :-
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get_time(Now),
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convert_time(Now, Date),
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format(Out, ' Date: ~w~n~n', [Date]).
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%% SWI end
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%% SICStus begin
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%% :- use_module(library(system), [datime/1]).
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%% format_date(Out) :-
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%% datime(datime(Year,Month,Day,Hour,Min,Sec)),
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%% format(Out, ' Date: ~d-~d-~d ~d:~d:~d~n~n', [Day,Month,Year,Hour,Min,Sec]).
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%% SICStus end
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/*******************************
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* MESSAGES *
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*******************************/
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:- multifile
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prolog:message/3.
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prolog:message(chr(start(File))) -->
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{ file_base_name(File, Base)
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},
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[ 'Translating CHR file ~w'-[Base] ].
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prolog:message(chr(end(_From, To))) -->
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{ file_base_name(To, Base)
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},
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[ 'Written translation to ~w'-[Base] ].
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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read_chr_file_to_terms(Spec, Terms) :-
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chr_absolute_file_name(Spec, [ access(read) ], Path),
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open(Path, read, Fd, []),
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read_chr_stream_to_terms(Fd, Terms),
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close(Fd).
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read_chr_stream_to_terms(Fd, Terms) :-
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chr_local_only_read_term(Fd, C0, [ module(chr) ]),
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read_chr_stream_to_terms(C0, Fd, Terms).
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read_chr_stream_to_terms(end_of_file, _, []) :- !.
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read_chr_stream_to_terms(C, Fd, [C|T]) :-
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( ground(C),
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C = (:- op(Priority,Type,Name)) ->
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op(Priority,Type,Name)
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;
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true
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),
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chr_local_only_read_term(Fd, C2, [module(chr)]),
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read_chr_stream_to_terms(C2, Fd, T).
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%% SWI begin
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chr_local_only_read_term(A,B,C) :- read_term(A,B,C).
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chr_absolute_file_name(A,B,C) :- absolute_file_name(A,B,C).
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%% SWI end
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%% SICStus begin
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%% chr_local_only_read_term(A,B,_) :- read_term(A,B,[]).
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%% chr_absolute_file_name(A,B,C) :- absolute_file_name(A,C,B).
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%% SICStus end
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