/* Part of CHR (Constraint Handling Rules) Author: Tom Schrijvers E-mail: Tom.Schrijvers@cs.kuleuven.be WWW: http://www.swi-prolog.org Copyright (c) 2004-2015, K.U. Leuven 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(chr, [ chr_compile_step1/2 % +CHRFile, -PlFile , chr_compile_step2/2 % +CHRFile, -PlFile , chr_compile_step3/2 % +CHRFile, -PlFile , chr_compile_step4/2 % +CHRFile, -PlFile , chr_compile/3 ]). :- autoload(library(listing), [portray_clause/2]). :- autoload(library(dialect), [expects_dialect/1]). :- multifile user:file_search_path/2. user:file_search_path(chr, '.'). %% SWI begin % vsc: :- expects_dialect(swi). :- if(current_prolog_flag(dialect, yap)). :- prolog_load_context(directory,D), add_to_path(D). :- else. :- use_module(library(listing)). % portray_clause/2 :- endif. %% SWI end :- include(chr_op). /******************************* * FILE-TO-FILE COMPILER * *******************************/ % chr_compile(+CHRFile, -PlFile) % % Compile a CHR specification into a Prolog file chr_compile_step1(From, To) :- use_module(chr(chr_translate_bootstrap)), chr_compile(From, To, informational). chr_compile_step2(From, To) :- use_module(chr(chr_translate_bootstrap1)), chr_compile(From, To, informational). chr_compile_step3(From, To) :- use_module(chr(chr_translate_bootstrap2)), chr_compile(From, To, informational). chr_compile_step4(From, To) :- use_module(chr(chr_translate)), chr_compile(From, To, informational). chr_compile(From, To, MsgLevel) :- print_message(MsgLevel, chr(start(From))), read_chr_file_to_terms(From,Declarations), % read_file_to_terms(From, Declarations, % [ module(chr) % get operators from here % ]), print_message(silent, chr(translate(From))), chr_translate(Declarations, Declarations1), insert_declarations(Declarations1, NewDeclarations), print_message(silent, chr(write(To))), writefile(To, From, NewDeclarations), print_message(MsgLevel, chr(end(From, To))). %% SWI begin specific_declarations([ (:- use_module(chr(chr_runtime))), (:- style_check(-discontiguous)), (:- style_check(-singleton)), (:- style_check(-no_effect)) | Tail ], Tail). %% SWI end %% SICStus begin %% specific_declarations([(:- use_module('chr_runtime')), %% (:-use_module(chr_hashtable_store)), %% (:- use_module('hpattvars')), %% (:- use_module('b_globval')), %% (:- use_module('hprolog')), % needed ? %% (:- set_prolog_flag(discontiguous_warnings,off)), %% (:- set_prolog_flag(single_var_warnings,off))|Tail], Tail). %% SICStus end insert_declarations(Clauses0, Clauses) :- specific_declarations(Decls,Tail), (Clauses0 = [(:- module(M,E))|FileBody] -> Clauses = [ (:- module(M,E))|Decls], Tail = FileBody ; Clauses = Decls, Tail = Clauses0 ). % writefile(+File, +From, +Desclarations) % % Write translated CHR declarations to a File. writefile(File, From, Declarations) :- open(File, write, Out), writeheader(From, Out), writecontent(Declarations, Out), close(Out). writecontent([], _). writecontent([D|Ds], Out) :- portray_clause(Out, D), % SWI-Prolog writecontent(Ds, Out). writeheader(File, Out) :- format(Out, '/* Generated by CHR bootstrap compiler~n', []), format(Out, ' From: ~w~n', [File]), format_date(Out), format(Out, ' DO NOT EDIT. EDIT THE CHR FILE INSTEAD~n', []), format(Out, '*/~n~n', []). %% SWI begin format_date(Out) :- get_time(Now), format_time(string(Date), '%+', Now), format(Out, ' Date: ~s~n~n', [Date]). %% SWI end %% SICStus begin %% :- use_module(library(system), [datime/1]). %% format_date(Out) :- %% datime(datime(Year,Month,Day,Hour,Min,Sec)), %% format(Out, ' Date: ~d-~d-~d ~d:~d:~d~n~n', [Day,Month,Year,Hour,Min,Sec]). %% SICStus end /******************************* * MESSAGES * *******************************/ :- multifile prolog:message/3. prolog:message(chr(start(File))) --> { file_base_name(File, Base) }, [ 'Translating CHR file ~w'-[Base] ]. prolog:message(chr(end(_From, To))) --> { file_base_name(To, Base) }, [ 'Written translation to ~w'-[Base] ]. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% read_chr_file_to_terms(Spec, Terms) :- absolute_file_name(Spec, Path, [ access(read) ]), open(Path, read, Fd, []), read_chr_stream_to_terms(Fd, Terms), close(Fd). read_chr_stream_to_terms(Fd, Terms) :- chr_local_only_read_term(Fd, C0, [ module(chr) ]), read_chr_stream_to_terms(C0, Fd, Terms). read_chr_stream_to_terms(end_of_file, _, []) :- !. read_chr_stream_to_terms(C, Fd, [C|T]) :- ( ground(C), C = (:- op(Priority,Type,Name)) -> op(Priority,Type,Name) ; true ), chr_local_only_read_term(Fd, C2, [module(chr)]), read_chr_stream_to_terms(C2, Fd, T). %% SWI begin chr_local_only_read_term(A,B,C) :- read_term(A,B,C). %% SWI end %% SICStus begin %% chr_local_only_read_term(A,B,_) :- read_term(A,B,[]). %% SICStus end