1		% (c) 2009-2025 Lehrstuhl fuer Softwaretechnik und Programmiersprachen,
2		% Heinrich Heine Universitaet Duesseldorf
3		% This software is licenced under EPL 1.0 (http://www.eclipse.org/org/documents/epl-v10.html)
4
5		:- module(b_machine_hierarchy,[analyse_hierarchy/2
6		,analyse_eventb_hierarchy/2
7		,main_machine_name/1 % find out name of main machine
8		,machine_name/1 % can be used to find out machine names
9		,machine_type/2 % machine_type(Name, R) - get the type
10		% (abstract_machine, abstract_model, refinement, implementation) for the machine named Name
11		,machine_references/2 % get a list of references and the type of the reference.
12		% Example: if A refines B, then machine_references('A',X) returns X= [ref(refines'B','')].
13		% The last argument in ref/3 is the prefix
14		,machine_identifiers/7 % gets Params,Sets,Abstract Variables,Concrete Variables,Abstract Constants and Concrete
15		% Constants for a machine. Abstract constants/Variables are introduced in the machine
16		% using the ABSTRACT_VARAIABLES/ABSTARCT_CONSTANTS keyword. The concrete versions
17		% analogously via CONCRETE_VARAIBLES,CONCRETE_CONSTANTS
18		% Example output for
19		% MACHINE xx(T,u)
20		% CONSTRAINTS u:T
21		% SETS A; B={foo, bar}
22		% CONCRETE_CONSTANTS cc
23		% PROPERTIES cc:B
24		% ABSTRACT_VARIABLES xx
25		% CONCRETE_VARIABLES yy
26		% INVARIANT
27		% xx:INT &
28		% yy : T
29		% INITIALISATION xx,yy:= ({1|->2};{2|->4})(1), u
30		% END
31		%
32		% machine_identifiers(A,B,C,D,E,F,G).
33		% A = xx,
34		% B = [identifier(pos(4,1,1,12,1,12),'T'),identifier(pos(5,1,1,14,1,14),u)],
35		% C = [deferred_set(pos(11,1,3,6,3,6),'A'),enumerated_set(pos(12,1,3,9,3,20),'B',[identifier(pos(13,1,3,12,3,14),foo),identifier(pos(14,1,3,17,3,19),bar)])],
36		% D = [identifier(pos(22,1,6,20,6,21),xx)],
37		% E = [identifier(pos(24,1,7,20,7,21),yy)],
38		% F = [],
39		% G = [identifier(pos(16,1,4,20,4,21),cc)]
40		, get_machine_identifier_names/7 % a version returning atomic identifier names
41		, machine_has_constants/1 % check if machine has some constants
42		,abstract_constant/2, concrete_constant/2
43		,possibly_abstract_constant/1
44		,machine_operations/2 % machine_operations(M, Ops) gets the names of the Operations defined in Machine M
45		,machine_operation_calls/2
46		,machine_hash/2 % stores a hash value for the machine
47		,properties_hash/2 % computes a hash over the constants and properties
48		,operation_hash/3 % computes a hash for the operation in a machine
49		,write_dot_hierarchy_to_file/1
50		,write_dot_op_hierarchy_to_file/1
51		,write_dot_event_hierarchy_to_file/1
52		,write_dot_variable_hierarchy_to_file/1
53		,get_machine_inclusion_graph/3
54		,get_machine_topological_order/1
55		,print_machine_topological_order/0
56		]).
57
58		:- use_module(library(lists)).
59		:- use_module(library(ordsets)).
60		:- use_module(bmachine,[b_get_definition/5, get_machine_file_number/4]).
61		:- use_module(bmachine_construction).
62		:- use_module(debug).
63		:- use_module(self_check).
64		:- use_module(specfile,[get_specification_description/2]).
65		:- use_module(extension('probhash/probhash'),[raw_sha_hash/2]).
66		:- use_module(input_syntax_tree).
67		:- use_module(dotsrc(dot_graph_generator), [gen_dot_graph/6, dot_no_same_rank/1,
68		use_new_dot_attr_pred/7, get_dot_cluster_name/2]).
69
70		:- use_module(value_persistance,[cache_is_activated/0]).
71		:- use_module(probsrc(tools),[split_list/4]).
72
73		:- use_module(module_information,[module_info/2]).
74		:- module_info(group,ast).
75		:- module_info(description,'This module provides functionality to visualize the dependencies of a B machine (include and sees relations, etc.).').
76
77		:- volatile
78		main_machine_name/1,
79		machine_type/2,
80		machine_package_directory/2,
81		machine_references/2,
82		machine_identifiers/7,
83		machine_operations/2,
84		machine_operation_calls/2,
85		machine_values_identifiers/2,
86		refines_event/4,
87		machine_has_assertions/1,
88		raw_machine/2,
89		machine_hash_cached/2,
90		properties_hash_cached/2, operation_hash_cached/3,
91		basic_operation_hash/4,
92		event_refinement_change/6.
93		:- dynamic
94		main_machine_name/1,
95		machine_type/2,
96		machine_package_directory/2,
97		machine_references/2,
98		machine_identifiers/7,
99		machine_operations/2,
100		machine_operation_calls/2,
101		machine_values_identifiers/2,
102		refines_event/4,
103		machine_has_assertions/1,
104		raw_machine/2,
105		machine_hash_cached/2,
106		properties_hash_cached/2, operation_hash_cached/3,
107		basic_operation_hash/4,
108		event_refinement_change/6.
109		:- volatile abstract_constant/2, concrete_constant/2.
110		:- dynamic abstract_constant/2.
111		:- dynamic concrete_constant/2.
112
113		:- use_module(specfile,[animation_minor_mode/1]).
114		possibly_abstract_constant(ID) :-
115		(abstract_constant(ID,_) ; animation_minor_mode(eventb),concrete_constant(ID,_) ).
116
117		reset_hierarchy :-
118		retract_all(main_machine_name/1),
119		retract_all(machine_type/2),
120		retract_all(machine_package_directory/2),
121		retract_all(machine_references/2),
122		retract_all(machine_identifiers/7),
123		retract_all(abstract_constant/2),
124		retract_all(concrete_constant/2),
125		retract_all(machine_operations/2),
126		retract_all(machine_operation_calls/2),
127		retract_all(machine_values_identifiers/2),
128		retract_all(refines_event/4),
129		retract_all(machine_has_assertions/1),
130		retract_all(machine_hash_cached/2),
131		retract_all(raw_machine/2),
132		retract_all(properties_hash_cached/2),
133		retract_all(operation_hash_cached/3),
134		retract_all(basic_operation_hash/4),
135		retract_all(event_refinement_change/6).
136
137		machine_name(Name) :- machine_type(Name,_).
138
139		:- use_module(eventhandling,[register_event_listener/3]).
140		:- register_event_listener(clear_specification,reset_hierarchy,
141		'Reset B Machine Hierarchy Facts.').
142
143		retract_all(Functor/Arity) :-
144		functor(Pattern,Functor,Arity),
145		retractall(Pattern).
146
147		analyse_hierarchy(Main,Machines) :- (var(Main) ; var(Machines)),!,
148		add_internal_error('Illegal call:',analyse_hierarchy(Main,Machines)).
149		analyse_hierarchy(Main,Machines) :-
150		reset_hierarchy,
151		assertz(main_machine_name(Main)),
152		analyse_machine(Main,Machines,main).
153
154		:- use_module(error_manager).
155		:- use_module(tools_strings,[ajoin/2]).
156		:- use_module(bmachine,[b_filenumber/4]).
157		:- public analyse_machine/3.
158		analyse_machine(Name,_Machines,_) :-
159		% machine already analysed
160		machine_type(Name,_),!.
161		analyse_machine(Name,Machines,_) :-
162		debug:debug_println(19,analysing_machine(Name)),
163		get_machine(Name,Machines,Type,Header,Refines,Body),
164		!,
165		( cache_is_activated -> % we need the machines stored for later analysis
166		assert_all_machines(Machines)
167		; true),
168		assertz(machine_type(Name,Type)),
169	?	(get_machine_parent_directory(Name,Dir) -> assertz(machine_package_directory(Name,Dir)) ; true),
170		( get_raw_section(assertions,Body,_) ->
171		assertz(machine_has_assertions(Name))
172		; true),
173		store_identifiers(Name,Header,Body),
174		store_operations(Name,Body),
175		store_values(Name,Body),
176		store_references(Name,Refines,Body,Machines).
177		analyse_machine(Name,Machines,RefType) :-
178		get_machine_file_number(Name,_Ext,Nr,File),
179		get_ref_type_name(RefType,Clause),
180		!,
181		( member(M,Machines),get_constructed_machine_name_and_filenumber(M,OtherName,Nr)
182		-> ajoin(['Cannot use B machine "',Name,'" within ', Clause,
183		' clause. Rename machine "', OtherName,'" to "', Name, '" in file: '],Msg)
184		; findall(MN,b_filenumber(MN,_,_,_),List),
185		ajoin(['Cannot find B machine "',Name,'" within ', Clause,
186		' clause (available: ',List,'). Check that machine name matches filename in: '],Msg)
187		),
188		add_error_fail(invalid_machine_reference,Msg,File).
189		analyse_machine(Name,_Machines,_) :-
190		add_error_fail(invalid_machine_reference,
191		'Could not find machine in parsed machine list (check that your machine names match your filenames): ',Name).
192
193		:- use_module(tools,[get_parent_directory_name/2]).
194		get_machine_parent_directory(Name,DirName) :-
195		% try and get parent directory name; useful to distinguish different packages when using package pragma
196	?	get_machine_file_number(Name,_Ext,_Nr,File),
197		get_parent_directory_name(File,DirName).
198
199
200		% store the un-typed input syntax tree for later analysis
201		assert_all_machines(Machines) :-
202	?	(raw_machine(_,_)
203		-> true % machines already asserted
204		; maplist(assert_raw_machine,Machines)).
205		assert_raw_machine(Machine) :-
206		get_raw_machine_name(Machine,Name),
207		(raw_machine(Name,_) -> add_warning(b_machine_hierarchy,'Raw machine already exists: ',Name) ; true),
208		assertz( raw_machine(Name,Machine) ).
209
210		machine_has_constants(MachName) :-
211		machine_identifiers(MachName,_,_,_,_,AConsts,CConsts),
212		(AConsts=[] -> CConsts = [_|_] ; true).
213
214		store_identifiers(Name,Header,Body) :-
215		get_parameters(Header,Params),
216		get_sets(Body,Sets),
217		get_identifiers([abstract_variables,variables],Body,AVars),
218		get_identifiers([concrete_variables],Body,CVars),
219		get_identifiers([abstract_constants],Body,AConsts),
220		get_identifiers([concrete_constants,constants],Body,CConsts), % fixed abstract -> concrete
221		assertz(machine_identifiers(Name,Params,Sets,AVars,CVars,AConsts,CConsts)),
222		maplist(assert_raw_id_with_position(abstract_constant),AConsts),
223		maplist(assert_raw_id_with_position(concrete_constant),CConsts).
224
225
226		raw_id_is_identifier2(description(_Pos,_Desc,Raw),ID) :- !, raw_id_is_identifier2(Raw,ID).
227		raw_id_is_identifier2(deferred_set(_,ID),ID) :- !.
228		raw_id_is_identifier2(enumerated_set(_,ID,_Elements),ID) :- !.
229		raw_id_is_identifier2(Raw,ID) :- raw_id_is_identifier(Raw,_,ID).
230
231		get_machine_identifier_names(Name,Params,Sets,AVars,CVars,AConsts,CConsts) :-
232		machine_identifiers(Name,RawParams,RawSets,RawAVars,RawCVars,RawAConsts,RawCConsts),
233		maplist(raw_id_is_identifier2,RawParams,Params),
234		maplist(raw_id_is_identifier2,RawSets,Sets),
235		maplist(raw_id_is_identifier2,RawAVars,AVars),
236		maplist(raw_id_is_identifier2,RawCVars,CVars),
237		maplist(raw_id_is_identifier2,RawAConsts,AConsts),
238		maplist(raw_id_is_identifier2,RawCConsts,CConsts).
239
240
241		machine_hash(Name,Hash) :-
242		machine_hash_cached(Name,Hash1),!,Hash=Hash1.
243		machine_hash(Name,Hash) :-
244		compute_machine_hash(Name,Hash1),
245		assertz( machine_hash_cached(Name,Hash1) ),
246		Hash=Hash1.
247		compute_machine_hash(Name,Digest) :-
248		if(raw_machine(Name,Machine),
249		raw_sha_hash(Machine,Digest),
250		add_error_and_fail(compute_machine_hash,'Machine does not exist or has not been processed:',Name)
251		).
252
253		:- use_module(pathes_extensions_db, [compile_time_unavailable_extension/2]).
254		:- if(\+ compile_time_unavailable_extension(probhash_extension, _)).
255		store_eventb_hash(Name,ContextMachTerm) :-
256		raw_sha_hash(ContextMachTerm,Digest),
257		assertz(machine_hash_cached(Name,Digest)).
258		:- else.
259		store_eventb_hash(Name,_) :-
260		assertz( (machine_hash_cached(Name,_) :-
261		add_error(b_machine_hierarchy,'prob_hash_extension not available for: ',Name),fail) ).
262		:- endif.
263
264		:- use_module(tools_strings,[get_hex_bytes/2]).
265		operation_hash(MachName,OpName,Hash) :-
266		operation_hash_cached(MachName,OpName,Hash1),!,Hash=Hash1.
267		operation_hash(MachName,OpName,Hash) :-
268		computed_basic_operation_hashes,
269		basic_operation_hash(OpName,MachName,Hash1,OpCalls),
270		(OpCalls = []
271		-> FinalHash=Hash1 % no recursive call of other operations
272		; maplist(get_basic_op_hash,OpCalls,OpDigests),
273		raw_sha_hash(op(Hash1,OpDigests),FinalHash) % also include hash of called operations
274		),
275		assertz( operation_hash_cached(MachName,OpName,FinalHash) ),
276		get_hex_bytes(FinalHash,Hex),
277		formatsilent('value caching: operation ~w in machine ~w has hash: ~s~n',[OpName,MachName,Hex]),
278		Hash=FinalHash.
279
280		get_basic_op_hash(OpName,Digest) :-
281		basic_operation_hash(OpName,_MachName,Digest,_OpCalls).
282
283		% compute basic hash, without taking recursive operation calls into account
284		computed_basic_operation_hashes :-
285	?	basic_operation_hash(_,_,_,_),!. % already computed
286		computed_basic_operation_hashes :-
287	?	get_raw_machine_operation_hash(MachName,OpName,Digest,OpCalls),
288		(basic_operation_hash(OpName,_,_,_)
289		-> add_warning(computed_basic_operation_hashes,'Multiple hashes for operation: ',OpName)
290		; true),
291		assertz(basic_operation_hash(OpName,MachName,Digest,OpCalls)),
292		get_hex_bytes(Digest,Hex),
293		formatsilent('value caching: basic operation hash ~w in machine ~w: ~s (calls ~w)~n',
294		[OpName,MachName,Hex,OpCalls]),
295		fail.
296		computed_basic_operation_hashes.
297
298		% first computed basic, independent operation hashes:
299		% only look up used definitions, but not yet called operations
300		get_raw_machine_operation_hash(MachName,OpName,Digest,SOpCalls) :-
301	?	raw_machine(MachName,Machine),
302		get_machine(MachName,[Machine],_Type,_Header,_Refines,MachBody),
303		get_opt_section(operations,MachBody,Operations),
304		Op = operation(_,identifier(_,OpName),_,_,_),
305	?	member(Op,Operations),
306		get_raw_operation_id_and_body(Op,identifier(_,OpName),OpBody),
307		extract_used_np_definitions(Op,MachBody,UsedDefinitions,DefsWithPos),
308		remove_raw_position_info(Op,RawOperation),
309		raw_sha_hash(op(RawOperation,UsedDefinitions),Digest),
310		findall(Id, (get_raw_operation_call_id(OpBody,Id) % extract op calls in body of operation
311		; get_def_body(Def,DefsWithPos), get_raw_operation_call_id(Def,Id) % extract op calls in definitions
312		),
313		OpCalls),
314		sort(OpCalls,SOpCalls).
315
316	?	get_def_body(Body,Defs) :- member(definition(_,_DefName,_,Body),Defs).
317
318
319		:- use_module(debug,[debug_println/2]).
320		assert_raw_id_with_position(PredFunctor,Rid) :-
321		(raw_id_is_identifier(Rid,Pos,ID)
322		-> true
323		; peel_desc(Rid,PRid), PRid = definition(Pos,ID,_)
324		-> add_error(illegal_definition_use,'Definition cannot be used as identifier here: ',ID,Pos)
325		; add_error_fail(assert_raw_id_with_position,'Not identifier: ',Rid)
326		),
327		Fact =.. [PredFunctor,ID,Pos],
328		assertz(Fact), debug_println(9,Fact).
329
330		raw_id_is_identifier(identifier(Pos,ID),Pos,ID).
331		raw_id_is_identifier(unit(_,_,identifier(Pos,ID)),Pos,ID).
332		raw_id_is_identifier(new_unit(_,_,identifier(Pos,ID)),Pos,ID).
333		raw_id_is_identifier(inferred_unit(_,_,identifier(Pos,ID)),Pos,ID).
334		raw_id_is_identifier(inferredunit(_,_,identifier(Pos,ID)),Pos,ID). % the (new?) parser seems to generate the wrong pragma in the .prob file; TO DO: investigate
335		raw_id_is_identifier(description(_,_,RawID),Pos,ID) :-
336		raw_id_is_identifier(RawID,Pos,ID).
337
338		peel_desc(description(_,_,E),R) :- !, peel_desc(E,R).
339		peel_desc(R,R).
340
341		get_raw_identifier(Raw,Res) :- raw_id_is_identifier(Raw,_Pos,Id),!, Res=Id.
342		get_raw_identifier(definition(_Pos,DID,[]),ID) :- % see also expand_definition_to_variable_list
343		atom(DID),!,
344		ajoin([DID,'(DEFINITION)'],ID).
345		get_raw_identifier(deferred_set(_Pos,DID),ID) :- atom(DID),!, ID=DID.
346		get_raw_identifier(enumerated_set(_Pos,DID,_List),ID) :- atom(DID),!, ID=DID.
347		get_raw_identifier(description(_,_,RawID),ID) :- !,
348		get_raw_identifier(RawID,ID).
349		get_raw_identifier(Raw,Res) :- add_internal_error('Cannot get identifier:',Raw),Res='???'.
350
351		raw_identifier_member(ID,List) :- member(Raw,List), raw_id_is_identifier(Raw,_Pos,ID).
352
353		store_operations(MachName,Body) :-
354		get_opt_section(operations,Body,Operations),
355		findall(I,(member(Op,Operations),get_raw_operation_id_and_body(Op,I,_)),Ids),
356		assertz(machine_operations(MachName,Ids)),
357		findall(calls(I1,I2),(member(Op,Operations),get_raw_operation_call(Op,I1,I2)),Calls),
358		sort(Calls,SCalls),
359		debug_println(9,machine_operation_calls(MachName,SCalls)),
360		assertz(machine_operation_calls(MachName,SCalls)).
361
362		get_raw_operation_id_and_body(operation(_Pos,Id,_,_,Body),Id,Body).
363		get_raw_operation_id_and_body(refined_operation(_Pos,Id,_Results,_Args,_RefinesID,Body),Id,Body).
364		get_raw_operation_id_and_body(description_operation(_Pos,_,Op),Id,Body) :- get_raw_operation_id_and_body(Op,Id,Body).
365
366		% get operations called in body
367		get_raw_operation_call(Op,Id,CallsId) :-
368		get_raw_operation_id_and_body(Op,identifier(_,Id),Body),
369	?	get_raw_operation_call(Body,identifier(_,CallsId)).
370
371		:- use_module(debug,[debug_format/3]).
372	?	get_raw_operation_call(block(_,Body),ID) :- !, get_raw_operation_call(Body,ID).
373	?	get_raw_operation_call(precondition(_,_,Body),ID) :- !, get_raw_operation_call(Body,ID).
374		get_raw_operation_call(assertion(_,_,Body),ID) :- !, get_raw_operation_call(Body,ID).
375		get_raw_operation_call(witness_then(_,_,Body),ID) :- !, get_raw_operation_call(Body,ID).
376	?	get_raw_operation_call(var(_,_,Body),ID) :- !, get_raw_operation_call(Body,ID).
377	?	get_raw_operation_call(select_when(_,_,Body),ID) :- !, get_raw_operation_call(Body,ID).
378	?	get_raw_operation_call(if_elsif(_,_,Body),ID) :- !, get_raw_operation_call(Body,ID).
379		get_raw_operation_call(let(_,_,_,Body),ID) :- !, get_raw_operation_call(Body,ID).
380	?	get_raw_operation_call(any(_,_,_,Body),ID) :- !, get_raw_operation_call(Body,ID).
381		get_raw_operation_call(case(_,_,_,_,_,Body),ID) :- !, get_raw_operation_call(Body,ID).
382	?	get_raw_operation_call(while(_,_Cond,Body,_,_),ID) :- !, get_raw_operation_call(Body,ID).
383	?	get_raw_operation_call(parallel(_,List),ID) :- !,member(A,List), get_raw_operation_call(A,ID).
384	?	get_raw_operation_call(sequence(_,List),ID) :- !,member(A,List), get_raw_operation_call(A,ID).
385	?	get_raw_operation_call(if(_,_Test,Then,List,Else),ID) :- !,member(A,[Then,Else|List]), get_raw_operation_call(A,ID).
386	?	get_raw_operation_call(select(_,_Cond,Body,List),ID) :- !,member(A,[Body|List]), get_raw_operation_call(A,ID).
387	?	get_raw_operation_call(select(_,_Cond,Body,List,Else),ID) :- !,member(A,[Body,Else|List]), get_raw_operation_call(A,ID).
388	?	get_raw_operation_call(choice(_,List),ID) :- !,member(A,List), get_raw_operation_call(A,ID).
389	?	get_raw_operation_call(choice_or(_,Body),ID) :- !, get_raw_operation_call(Body,ID).
390		get_raw_operation_call(operation_call(_,ID,_,_),ID) :- !.
391		get_raw_operation_call(skip(_),_) :- !, fail.
392		get_raw_operation_call(assign(_,_,_),_) :- !, fail.
393		get_raw_operation_call(becomes_element_of(_,_,_),_) :- !, fail.
394		get_raw_operation_call(becomes_such(_,_,_),_) :- !, fail.
395		get_raw_operation_call(definition(_,Name,_),_) :- !, % TO DO: improve
396		debug_format(19,'Ignoring operation calls in DEFINITION ~w for operation call diagram~n',[Name]),
397		% b_get_definition(Name,_DefType,_Args,DefBody,_Deps), not yet precompiled !
398		fail.
399		get_raw_operation_call(Subst,_) :- functor(Subst,F,N),print(uncovered_subst(F,N,Subst)),nl,fail.
400		% we also do not find operation calls in expressions
401
402		:- use_module(input_syntax_tree,[raw_operator_term/1, raw_literal_term/1, raw_special_set_term/1]).
403		% avoid spurious uncovered_subst messages in a context where we are not sure we have a subst
404		try_get_raw_operation_call(Term,_) :- raw_literal_term(Term),!, fail.
405		try_get_raw_operation_call(Term,_) :- raw_operator_term(Term),!, fail.
406		try_get_raw_operation_call(Term,_) :- raw_special_set_term(Term),!, fail.
407		try_get_raw_operation_call(Body,ID) :- get_raw_operation_call(Body,ID).
408
409		get_raw_operation_call_id(OpBody,CalledId) :-
410		try_get_raw_operation_call(OpBody,identifier(_,CalledId)).
411
412		store_references(Name,Refines,Body,Machines) :-
413		get_refinements(Refines,Refs1),
414		get_references(Body,Refs2),
415		append(Refs1,Refs2,Refs),
416		assertz(machine_references(Name,Refs)),
417		follow_refs(Refs,Machines).
418
419		get_references(Body,Refs) :-
420		findrefs(Body,includes,Includes),
421		findrefs(Body,extends,Extends),
422		findrefs(Body,imports,Imports),
423		findusessees(Body,uses,Uses),
424		findusessees(Body,sees,Sees),
425		append([Includes,Imports,Extends,Uses,Sees],Refs).
426
427		get_refinements([],[]).
428		get_refinements([Name|NRest],[ref(refines,Name,'')|RRest]) :-
429		get_refinements(NRest,RRest).
430
431		findrefs(Body,Type,Refs) :-
432		get_opt_section(Type,Body,RawRefs),
433		findrefs2(RawRefs,Type,Refs).
434		findrefs2([],_Type,[]).
435		findrefs2([machine_reference(_Pos,R,_Params)|MRest],Type,[ref(Type,Name,Prefix)|RRest]) :-
436		bmachine_construction:split_prefix(R,Prefix,Name),
437		findrefs2(MRest,Type,RRest).
438
439		findusessees(Body,Type,Refs) :-
440		get_opt_section(Type,Body,RawRefs),
441		findusessees2(RawRefs,Type,Refs).
442		findusessees2([],_Type,[]).
443		findusessees2([identifier(_Pos,Name)|MRest],Type,[ref(Type,Name,'')|RRest]) :-
444		findusessees2(MRest,Type,RRest).
445
446		follow_refs([],_Machines).
447		follow_refs([ref(RefType,Name,_Prefix)|Rest],Machines) :-
448		analyse_machine(Name,Machines,RefType),
449		follow_refs(Rest,Machines).
450
451		get_parameters(machine_header(_Pos,_Name,Params),Params).
452
453		get_sets(Body,Sets) :-
454		get_opt_section(sets,Body,Sets).
455
456		get_identifiers([],_Body,[]).
457		get_identifiers([Sec|Rest],Body,Ids) :-
458		get_opt_section(Sec,Body,Ids1),
459		append(Ids1,IRest,Ids),
460		get_identifiers(Rest,Body,IRest).
461
462		get_opt_sections([],_Body,[]).
463		get_opt_sections([S|Srest],Body,Contents) :-
464		get_opt_section(S,Body,L),append(L,Rest,Contents),
465		get_opt_sections(Srest,Body,Rest).
466
467		get_opt_section(Sec,Body,Result) :-
468		( get_raw_section(Sec,Body,Content) -> Result=Content; Result=[]).
469		get_raw_section(Sec,Body,Content) :- % look for Sec(_Pos,Content) in Body list
470		functor(Pattern,Sec,2),arg(2,Pattern,Content),
471		memberchk(Pattern,Body).
472
473		get_machine(Name,Machines,Type,Header,Refines,Body) :-
474		get_machine1(Name,Machines,_Machine,Type,Header,Refines,Body).
475		%get_raw_machine(Name,Machines,Machine) :-
476		% get_machine1(Name,Machines,Machine,_Type,_Header,_Refines,_Body).
477		get_machine1(Name,Machines,Machine,Type,Header,Refines,Body) :-
478		Header = machine_header(_Pos,Name,_Params),
479	?	member(Machine,Machines),
480		get_machine2(Machine,Type,Header,Refines,Body),!.
481		get_machine2(abstract_machine(_Pos,MS,Header,Body),TypeOfAbstractMachine,Header,[],Body) :-
482		get_abstract_machine_type(MS,TypeOfAbstractMachine).
483		get_machine2(refinement_machine(_Pos,Header,Refines,Body),refinement,Header,[Refines],Body).
484		get_machine2(implementation_machine(_Pos,Header,Refines,Body),implementation,Header,[Refines],Body).
485		get_machine2(generated(_Pos,Machine),A,B,C,D) :- % @generated Pragma used at top of file
486		get_machine2(Machine,A,B,C,D).
487		get_machine2(unit_alias(_Pos,_Name,_Alias,Machine),A,B,C,D) :-
488		get_machine2(Machine,A,B,C,D).
489
490		get_raw_machine_name(Machine,Name) :-
491		get_machine2(Machine,_,machine_header(_,Name,_),_,_).
492
493		get_abstract_machine_type(machine(_Pos2),R) :- !,R=abstract_machine.
494		get_abstract_machine_type(system(_Pos2),R) :- !,R=abstract_machine.
495		get_abstract_machine_type(model(_Pos2),R) :- !,R=abstract_model.
496		get_abstract_machine_type(X,R) :- atomic(X),!,
497		add_error(get_abstract_machine_type,'Your parser seems out-dated. Assuming abstract_machine: ',X),
498		R=abstract_machine.
499
500
501		get_values_id(values_entry(Pos,ID,_Val),identifier(Pos,ID)).
502		% Store the identifiers assigned to in VALUES clauses
503		store_values(Name,Body) :-
504		get_opt_section('values',Body,Values),!,
505		maplist(get_values_id,Values,ValuesIDs),
506		assertz(machine_values_identifiers(Name,ValuesIDs)).
507		store_values(_,_).
508
509		%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
510
511		% write dot operation call graph
512		write_dot_op_hierarchy_to_file(File) :-
513		(get_preference(dot_event_hierarchy_horizontal,true) -> PageOpts=[rankdir/'LR'] ; PageOpts=[]),
514		gen_dot_graph(File,PageOpts,dot_operation_node,dot_op_calls_op,dot_no_same_rank,dot_subgraph(op_hierarchy)).
515
516
517		:- use_module(bmachine,[b_top_level_operation/1, b_top_level_feasible_operation/1]).
518		dot_operation_node(OpName,M,Desc,Shape,Style,Color) :-
519		machine_operations(M,Operations),
520		(machine_promotes_operations(M,Promotes) -> true ; Promotes=[]),
521		raw_identifier_member(OpName,Operations),
522		(b_top_level_feasible_operation(OpName) -> Color=lightgray
523		; b_top_level_operation(OpName) -> Color='OldLace' % commented out operation
524		; raw_identifier_member(OpName,Promotes) -> Color='gray98' % promoted but not to top_level
525		; Color=white),
526		Desc=OpName, Shape=box, Style=filled.
527
528		dot_op_calls_op(Op1,Label,Op2,Color,Style) :- Style=solid, Color=steelblue,
529		Label = '', % TO DO: different colors for local operation calls, detect op calls in expressions?
530		machine_operation_calls(_,Operations),
531		member(calls(Op1,Op2),Operations).
532
533
534
535		%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
536		% print hierarchy to dot file
537
538		maxlinelength(30).
539
540		:- use_module(tools_io).
541
542		% write hierarchy of machines, with inclusion/refinement links
543		write_dot_hierarchy_to_file(Filename) :-
544		findall(M,machine_type(M,_),Machines),
545		safe_open_file(Filename,write,S,[]),
546		( print_header(S),
547	?	print_machines(S,1,Machines,Ids),
548	?	print_refs_for_dot(S,Ids,Ids),
549		print_footer(S)
550		-> true
551		; add_internal_error('Command failed:',write_dot_hierarchy_to_file(Filename))
552		),
553		close(S).
554
555		print_header(S) :-
556		write(S,'digraph module_hierarchy {\n'),
557		write(S,' graph [page="8.5, 11",ratio=fill,size="7.5,10"];\n').
558		print_footer(S) :-
559		write(S,'}\n').
560
561		print_machines(_S,_Nr,[],[]).
562		print_machines(S,Nr,[M|Machines],[id(M,Nr)|Ids]) :-
563		(print_machine(S,Nr,M) -> true
564		; add_internal_error('Printing machine for hierarchy failed: ',print_machine(S,Nr,M))
565		),
566		Nr2 is Nr + 1,
567	?	print_machines(S,Nr2,Machines,Ids).
568		print_machine(S,Nr,M) :-
569		write(S,' '),write(S,Nr),
570		(main_machine_name(M) ->
571		write(S,' [shape=record, style=bold, color=darkgreen, label=\"|{')
572		; write(S,' [shape=record, color=steelblue, label=\"|{')),
573		print_machine_header(S,M),
574		machine_identifiers(M,_Params,Sets,AVars,CVars,AConsts,CConsts),
575		%print_hash(S,M),
576		print_sets(S,Sets),
577		print_identifiers(S,'VARIABLES',AVars),
578		print_identifiers(S,'CONCRETE VARIABLES',CVars),
579		print_identifiers(S,'ABSTRACT CONSTANTS',AConsts),
580		print_identifiers(S,'CONSTANTS',CConsts),
581		(machine_values_identifiers(M,VConsts)
582		-> print_identifiers(S,'VALUES',VConsts)
583		; true),
584		( machine_has_assertions(M) ->
585		get_specification_description(assertions,AssStr),
586		print_title(S,AssStr)
587		; true
588		),
589		(machine_promotes_operations(M,Promotes)
590		-> print_identifiers(S,'PROMOTES',Promotes) ; true),
591		machine_operations(M,Operations),
592		delete(Operations,identifier(_,'INITIALISATION'),Operations2),
593		exclude(is_refinining_event(M),Operations2,RefiningOperations),
594		include(is_refinining_event(M),Operations2,NewOperations),
595		((RefiningOperations=[] ; NewOperations=[])
596		-> get_specification_description(operations,OpStr),
597		print_identifiers(S,OpStr,Operations2)
598		; print_identifiers(S,'EVENTS (refining)',RefiningOperations),
599		print_identifiers(S,'EVENTS (new)',NewOperations)
600		),
601
602		write(S,'}|\"];\n').
603
604		is_refinining_event(M,identifier(_,Event)) :- (refines_event(M,Event,_,_) -> true).
605
606		%print_hash(S,M) :- machine_hash(M,Digest),!,print_title(S,'Digest'),
607		% maplist(format(S,'~16r'),Digest),write(S,'\\n').
608		%print_hash(_S,_M).
609
610		%get_machine_colour(M,steelblue) :- main_machine_name(M),!.
611		%get_machine_colour(_M,steelblue).
612
613		print_machine_header(S,M) :-
614		machine_type(M,Type),
615		get_machine_type_keyw(Type,P),
616		write(S,P),write(S,' '),
617		write(S,M),
618	?	(machine_package_directory(M,Dir), machine_package_directory(_M2,D2), D2 \= Dir
619		-> format(S,' (~w)',[Dir]) % show the name of the directory; probably the package pragma was used
620		; true),
621		write(S,'\\n').
622		get_machine_type_keyw(abstract_machine,'MACHINE').
623		get_machine_type_keyw(abstract_model,'MODEL').
624		get_machine_type_keyw(refinement,'REFINEMENT').
625		get_machine_type_keyw(implementation,'IMPLEMENTATION').
626		get_machine_type_keyw(context,'CONTEXT').
627
628		print_sets(_,[]) :- !.
629		print_sets(S,Sets) :-
630		write(S,'|SETS\\n'),
631		print_sets2(Sets,S).
632		print_sets2([],_).
633		print_sets2([Set|Rest],S) :-
634		print_set(Set,S),
635		write(S,'\\n'),
636		print_sets2(Rest,S).
637		print_set(description(_Pos,_Desc,Raw),S) :- print_set(Raw,S).
638		print_set(deferred_set(_Pos,Name),S) :-
639		write_id(S,Name).
640		print_set(enumerated_set(_Pos,Name,List),S) :-
641		write_id(S,Name),write(S,' = \\{'),
642		maxlinelength(Max),
643		preferences:get_preference(dot_hierarchy_max_ids,MaxIdsToPrint),
644		print_set_elements(List,S,Max,MaxIdsToPrint),
645		write(S,'\\}').
646		print_set_elements([],_,_,_).
647		print_set_elements([RawID],S,_LenSoFar,_) :-
648		raw_id_is_identifier(RawID,_,Name),
649		!,write_id(S,Name).
650		print_set_elements([RawID,B|Rest],S,LenSoFar,MaxIdsToPrint) :-
651		raw_id_is_identifier(RawID,_,Name),
652		dec_atom_length(LenSoFar,Name,NewLen),
653		(NewLen<0 -> maxlinelength(NL0),NL is NL0-1,write(S,'\\n ') ; NL is NewLen-1),
654		write_id(S,Name),write(S,','),
655		M1 is MaxIdsToPrint-1,
656		(M1 < 1, Rest \= []
657		-> write(S,'...,'),
658		last([B|Rest],Last), print_set_elements([Last],S,NL,M1)
659		; print_set_elements([B|Rest],S,NL,M1)
660		).
661
662		:- use_module(tools,[string_escape/2]).
663		% write identifier and escape it for dot
664		write_id(S,Name) :- string_escape(Name,EName), write(S,EName).
665
666		dec_atom_length(Prev,Atom,New) :- atom_length(Atom,Len),
667		New is Prev-Len.
668
669		print_title(S,Title) :-
670		write(S,'|'),
671		write(S,Title),write(S,'\\n').
672		print_identifiers(_S,_,[]) :- !.
673		print_identifiers(S,Title,List) :-
674		print_title(S,Title),
675		preferences:get_preference(dot_hierarchy_max_ids,MaxIdsToPrint), % how many do we print overall; -1 means print all of them
676		print_identifiers2(List,0,_,S,MaxIdsToPrint).
677		print_identifiers2([],Count,Count,_,_MaxIdsToPrint).
678		print_identifiers2([RawID|Rest],Count,NCount,S,MaxIdsToPrint) :-
679		get_raw_identifier(RawID,Name),
680		(MaxIdsToPrint = 0,Rest\=[]
681		-> length(Rest,Len), RN is Len+1,
682		format(S,' (~w more)',[RN])
683		; MaxIdsToPrint1 is MaxIdsToPrint-1,
684		print_identifier(Name,Count,ICount,S),
685		(Rest = [] -> true; write(S,',')),
686		print_identifiers2(Rest,ICount,NCount,S,MaxIdsToPrint1)
687		).
688		print_identifier(Name,Count,NewCount,S) :-
689		atom_codes(Name,Codes),
690		length(Codes,Length),
691		NewCount1 is Count+Length,
692		maxlinelength(Max),
693		( Count == 0 -> NewCount1=NewCount
694		; NewCount1 =< Max -> NewCount1=NewCount
695		; NewCount=0,write(S,'\\n')),
696		write_id(S,Name).
697
698		print_refs_for_dot(_S,[],_).
699		print_refs_for_dot(S,[id(M,Nr)|Rest],Ids) :-
700		machine_references(M,Refs),
701		filter_redundant_refs(Refs,Refs,UsefulRefs),
702		print_refs2(UsefulRefs,M,Nr,Ids,S),
703	?	print_refs_for_dot(S,Rest,Ids).
704		print_refs2([],_,_,_,_).
705		print_refs2([ref(Type,Dest,_Prefix)|Rest],M,Nr,Ids,S) :-
706		member(id(Dest,DestNr),Ids),!,
707	?	get_ref_type(Type,Ref,Dir), !,
708		(Dir=reverse ->
709		format(S,' ~w -> ~w ~w;~n',[DestNr,Nr,Ref])
710		; format(S,' ~w -> ~w ~w;~n',[Nr,DestNr,Ref])
711		),
712		print_refs2(Rest,M,Nr,Ids,S).
713		get_ref_type(includes,'[label=\"INCLUDES\",color=navyblue]',normal).
714		get_ref_type(imports,'[label=\"IMPORTS\",color=navyblue]',normal).
715		get_ref_type(extends,'[label=\"EXTENDS\",color=navyblue]',normal).
716		get_ref_type(uses,'[label=\"USES\",color=navyblue,style=dashed]',normal).
717		get_ref_type(sees,'[label=\"SEES\",color=navyblue,style=dashed]',normal).
718		%get_ref_type(sees,'[label=\"SEES\",color=navyblue,style=dashed,dir=back]',reverse).
719		%get_ref_type(refines,'[label=\"REFINES\",color=navyblue,style=bold,dir=back]',reverse).
720		get_ref_type(refines,'[label=\"REFINEMENT\",color=navyblue,style=bold]',reverse). % reverse so that abstract machines are shown on top
721		get_ref_type(UNKNOWN,'[label=\"UNKNOWN\",color=navyblue]',normal) :- add_internal_error('Unknown : ',get_ref_type(UNKNOWN,_,_)).
722
723		get_ref_type_name(includes,'INCLUDES').
724		get_ref_type_name(imports,'IMPORTS').
725		get_ref_type_name(extends,'EXTENDS').
726		get_ref_type_name(uses,'USES').
727		get_ref_type_name(sees,'SEES').
728		get_ref_type_name(refines,'REFINEMENT').
729		get_ref_type_name(main,'MACHINE').
730		get_ref_type_name(UNKNOWN,UNKNOWN).
731
732
733		% remove redundant references (has to be done after analyse_eventb_machine has asserted all facts)
734		filter_redundant_refs([],_,[]).
735		filter_redundant_refs([ref(sees,Dest,_)|T],All,R) :-
736		machine_type(Dest,context),
737		member(ref(sees,Other,_),All),
738		machine_references(Other,Refs),
739		member(ref(extends,Dest,_),Refs), % Dest already seen by other seen context;
740		% Note: Rodin export contains transitive sees relation;
741		% if the user had included Dest in the sees clause we would have a warning "Redundant seen context"
742		!,
743		%format(user_output,'Redundant sees of ~w (~w)~n',[Dest,Other]),
744		filter_redundant_refs(T,All,R).
745		filter_redundant_refs([H|T],All,[H|R]) :-
746		filter_redundant_refs(T,All,R).
747
748		/************************************************************************/
749		/* The same for Event-B */
750		/************************************************************************/
751
752		analyse_eventb_hierarchy(Machines,Contextes) :-
753		reset_hierarchy,
754		get_eventb_name(Machines,Contextes,MainName),
755		assertz(main_machine_name(MainName)),
756	?	maplist(analyse_eventb_machine,Machines),
757		analyse_eventb_refinement_types(Machines),
758	?	maplist(analyse_eventb_context,Contextes),!.
759		analyse_eventb_hierarchy(Machines,Contextes) :-
760		add_internal_error('Analyzing Event-B Hierarchy Failed: ',analyse_eventb_hierarchy(Machines,Contextes)).
761
762		get_eventb_name([MainMachine|_AbstractMachines],_Contextes,Name) :-
763		event_b_model(MainMachine,Name,_),!.
764		get_eventb_name(_Machines,[MainContext|_AbstractContextes],Name) :-
765		event_b_context(MainContext,Name,_).
766
767		event_b_model(event_b_model(_,Name,Sections),Name,Sections).
768		event_b_context(event_b_context(_,Name,Sections),Name,Sections).
769
770		analyse_eventb_machine(Machine) :-
771		event_b_model(Machine,Name,Sections),
772		% print(analyzing(Name)),nl,
773		( memberchk(refines(_,RName),Sections) -> Type=refinement, RRefs=[ref(refines,RName,'')]
774		; Type=abstract_model, RRefs=[], RName='$none'),
775		get_identifiers([variables],Sections,Vars),
776		get_sees_context_refs(Sections,SRefs),
777		append(RRefs,SRefs,Refs),
778		get_events(Name,Sections,Events,RName),
779		store_eventb_hash(Name,Machine),
780		assertz(machine_type(Name,Type)),
781		assertz(machine_identifiers(Name,[],[],Vars,[],[],[])),
782		assertz(machine_references(Name,Refs)),
783		assertz(machine_operations(Name,Events)),
784		assertz(machine_operation_calls(Name,[])), % Event-B events cannot call other events
785	?	assert_if_has_theorems(Name,Sections).
786
787
788		% analyze which kinds of refinments we have between events
789		analyse_eventb_refinement_types([]).
790		analyse_eventb_refinement_types([RefMachine,AbsMachine|_]) :-
791		event_b_model(RefMachine,RefName,RefSections),
792		memberchk(refines(_,AbsName),RefSections),
793		event_b_model(AbsMachine,AbsName,AbsSections),
794		get_opt_section(events,RefSections,RawEvents),
795		get_opt_section(events,AbsSections,AbsRawEvents),
796	?	member(RawEvent,RawEvents),
797		bmachine_eventb:raw_event(RawEvent,_,RefEvName,_St1,Ref,_Prm1,RefGrd,_Thm1,RefAct,_Wit1,_Desc1),
798		Ref = [AbsEvName],
799	?	member(AbsRawEvent,AbsRawEvents),
800		bmachine_eventb:raw_event(AbsRawEvent,_,AbsEvName,_St2,_,_Prm2,AbsGrd,_Thm2,AbsAct,_Wit2,_Desc2),
801		check_raw_prefix(AbsGrd,RefGrd,SameGuard),
802		check_raw_prefix(AbsAct,RefAct,SameAct),
803		%% format('~nEvent refinement change ~w (~w) -> ~w (~w) guard: ~w, action: ~w~n',[RefEvName,RefName,AbsEvName,AbsName,SameGuard,SameAct]),
804		%print(rawgrd(RefGrd,AbsGrd)), nl, print(rawact(RefAct,AbsAct)),nl,
805		assertz(event_refinement_change(RefName,RefEvName,AbsName,AbsEvName,SameGuard,SameAct)),
806		fail.
807		analyse_eventb_refinement_types([_|T]) :- analyse_eventb_refinement_types(T).
808
809		check_raw_prefix([],[],Res) :- !, Res=unchanged.
810		check_raw_prefix([],[_|_],Res) :- !, Res=extends. % the refinement has some more actions/guards
811		check_raw_prefix([Abs|AT],[Ref|RT],Result) :- same_raw_expression(Abs,Ref),!,
812		check_raw_prefix(AT,RT,Result).
813		check_raw_prefix(_,_,refines).
814
815		% TO DO: check if we have a more complete version of this predicate; to do: handle @desc description/3 terms
816		same_raw_expression(identifier(_,A),RHS) :- !, RHS=identifier(_,B), A=B.
817		same_raw_expression(equal(_,A,B),RHS) :- !, RHS=equal(_,A2,B2), same_raw_expression(A,A2), same_raw_expression(B,B2).
818		same_raw_expression(assign(_,A1,A2),RHS) :- !, RHS=assign(_,B1,B2),
819		maplist(same_raw_expression,A1,B1), maplist(same_raw_expression,A2,B2).
820		same_raw_expression(A,B) :- atomic(A),!, A=B.
821		same_raw_expression(A,B) :- A =.. [F,_|AA], % print(match(F,AA)),nl,
822		B=.. [F,_|BB], maplist(same_raw_expression,AA,BB).
823
824
825
826		get_sees_context_refs(Sections,SRefs) :-
827		get_opt_section(sees,Sections,Seen),
828		findall(ref(sees,I,''),member(I,Seen),SRefs).
829
830		:- use_module(bmachine_eventb,[raw_event/11]).
831		get_events(Name,Sections,Events,AbsMachineName) :-
832		get_opt_section(events,Sections,RawEvents),
833		compute_event_refines(Name,RawEvents,AbsMachineName),
834		findall( identifier(Pos,EvName),
835		( member(RawEvent,RawEvents),
836		raw_event(RawEvent,Pos,EvName,_St,_Rf,_Prm,_Grd,_Thm,_Act,_Wit,_Desc) ),
837		Events).
838
839		% TO DO: detect when an event extends another one without changing it
840		compute_event_refines(MachineName,RawEvents,AbsMachineName) :-
841	?	member(RawEvent,RawEvents),
842		bmachine_eventb:raw_event(RawEvent,_Pos,EvName,_St,Refines,_Prm,_Grd,_Thm,_Act,_Wit,_Desc),
843	?	member(RefEvent,Refines),
844		% print(refines(MachineName,EvName,AbsMachineName,RefEvent)),nl,
845		assertz(refines_event(MachineName,EvName,AbsMachineName,RefEvent)),
846		fail.
847		compute_event_refines(_,_,_).
848
849
850		% try and get the name of the machine we refine
851		%machine_refines(Machine,AbsMachine) :- machine_references(Machine,Refs), member(ref(refines,AbsMachine,_),Refs).
852
853		analyse_eventb_context(Context) :-
854		event_b_context(Context,Name,Sections),
855		get_identifiers([constants],Sections,ConcreteConstants),
856		get_identifiers([abstract_constants],Sections,AbstractConstants),
857		append([ConcreteConstants,AbstractConstants],AllConstants),
858		get_sets(Sections,Sets),
859		get_extends_refs(Sections,Refs),
860		store_eventb_hash(Name,Context),
861		assertz(machine_type(Name,context)),
862		assertz(machine_identifiers(Name,[],Sets,[],[],[],AllConstants)),
863		assertz(machine_references(Name,Refs)),
864		assertz(machine_operations(Name,[])),
865		assertz(machine_operation_calls(Name,[])),
866		maplist(assert_raw_id_with_position(concrete_constant),ConcreteConstants),
867		maplist(assert_raw_id_with_position(abstract_constant),AbstractConstants),
868	?	assert_if_has_theorems(Name,Sections).
869
870		get_extends_refs(Sections,Refs) :-
871		get_opt_section(extends,Sections,Extended),
872		findall(ref(extends,E,''),member(E,Extended),Refs).
873
874		assert_if_has_theorems(Name,Sections) :-
875		get_opt_section(theorems,Sections,[_|_]),
876		assertz(machine_has_assertions(Name)).
877		assert_if_has_theorems(_Name,_Sections).
878
879
880		% compute a hash based on constants and properties
881		properties_hash(MachineName,Hash) :-
882		properties_hash_cached(MachineName,Hash1),!,
883		Hash=Hash1.
884		properties_hash(MachineName,Hash) :-
885		compute_properties_hash(MachineName,Hash1),
886		assertz(properties_hash_cached(MachineName,Hash1)),
887		Hash=Hash1.
888		compute_properties_hash(Name,Hash) :-
889		raw_machine(Name,Machine),
890		get_machine(Name,[Machine],_Type,_Header,_Refines,Body),
891		extract_sorted_np_sets(Body,Sets),
892		extract_sorted_np_constants(Body,Constants),
893		extract_np_properties(Body,Properties),
894		extract_used_np_definitions_from_properties(Body,Definitions),
895		ToHash = [Sets,Constants,Properties,Definitions],
896		raw_sha_hash(ToHash,Hash).
897		% save_properties_hash(Name,ToHash,Hash).
898
899		extract_sorted_np_sets(Body,Sets) :-
900		get_sets(Body,PosSets),
901		remove_raw_position_info(PosSets,UnsortedSets),
902		sort(UnsortedSets,Sets).
903		extract_sorted_np_constants(Body,Constants) :-
904		get_opt_sections([constants,concrete_constants,abstract_constants],Body,PosConstants),
905		remove_raw_position_info(PosConstants,UnsortedConstants),
906		sort(UnsortedConstants,Constants).
907		extract_np_properties(Body,Properties) :-
908		get_opt_section(properties,Body,PosProperties),
909		remove_raw_position_info(PosProperties,Properties).
910		extract_used_np_definitions_from_properties(Body,Definitions) :-
911		get_opt_section(properties,Body,Properties),
912		extract_used_np_definitions(Properties,Body,Definitions,_).
913		extract_used_np_definitions(RawSyntax,Body,Definitions,PosDefinitions) :-
914		extract_raw_identifiers(RawSyntax,UsedIds),
915		all_definition_ids(Body,AllDefs),
916		ord_intersection(UsedIds,AllDefs,UsedDefNames),
917		transitive_used_definitions(UsedDefNames,AllUsedDefs),
918		findall( definition(none,Name,Args,DefBody),
919		( member(Name,AllUsedDefs),b_get_definition(Name,_DefType,Args,DefBody,_Deps)),
920		PosDefinitions),
921		maplist(remove_raw_position_info,PosDefinitions,Definitions).
922		all_definition_ids(Body,Ids) :-
923		get_opt_section(definitions,Body,Definitions),
924		convlist(get_definition_name,Definitions,Ids1),
925		sort(Ids1,Ids).
926		transitive_used_definitions(Defs,TransDefs) :-
927		findall( D, reachable_definition(Defs,D), TD1),
928		sort(TD1,TransDefs).
929		reachable_definition(Defs,D) :-
930	?	member(N,Defs),
931		( D=N
932	?	; b_get_definition(N,_DefType,_Args,_Body,Deps),
933	?	reachable_definition(Deps,D)).
934
935
936		/* just for debugging:
937		save_properties_hash(MachineName,ToHash,Hash) :-
938		main_machine_name(Main),
939		open('/home/plagge/hashes.pl',append,S),
940		writeq(S,hash(Main,MachineName,ToHash,Hash)),
941		write(S,'.\n'),
942		close(S).
943		*/
944
945		% ---------------------------
946		:- dynamic event_info/3.
947		analyze_extends_relation :-
948		retractall(event_info(_,_,_)),
949		bmachine:b_get_machine_operation(_Name,_Results,_RealParameters,TBody,_OType,_OpPos),
950		treat_event_body(TBody),fail.
951		analyze_extends_relation.
952
953		treat_event_body(TBody) :-
954		rlevent_info(TBody,EventName,Machine,Status,AbstractEvents),
955		% format('Event ~w:~w ~w~n',[Machine,EventName,Status]),
956		assertz(event_info(Machine,EventName,Status)),
957		maplist(treat_event_body,AbstractEvents).
958
959		:- use_module(bsyntaxtree,[get_texpr_expr/2]).
960		rlevent_info(TBody,EventName,Machine,FStatus,AbstractEvents) :-
961		get_texpr_expr(TBody,Event),
962		Event = rlevent(EventName,Machine,TStatus,_Params,_Guard,_Theorems,_Actions,_VWit,_PWit,_Unmod,AbstractEvents),
963		bsyntaxtree:get_texpr_expr(TStatus,Status), %ordinary, convergent, anticipated
964		functor(Status,FStatus,_).
965
966
967		% write the event refinement hierarchy to a dot file
968		% (currently) only makes sense for Event-B models
969
970		:- use_module(preferences,[get_preference/2]).
971		:- use_module(tools_strings,[ajoin/2, ajoin_with_sep/3]).
972
973		:- public dot_refinement_node_new/4.
974		% variation for: use_new_dot_attr_pred
975		dot_refinement_node_new(event_refinement,M:Ev,M,[label/Desc,shape/Shape,tooltip/Tooltip|T1]) :-
976		dot_event_node(M:Ev,M,Desc,Shape,Style,Color),
977		(Style=none -> T1=T2 ; T1=[style/Style|T2]),
978		(Color=none -> T2=[] ; T2=[color/Color]),
979		(event_info(M,Ev,Status) -> true ; Status=unknown),
980		(event_refinement_change(M,Ev,AbsName,AbsEvName,SameGuard,SameAct)
981		-> ajoin(['Event ',Ev,' in ',M,
982		'\n status: ',Status,
983		'\n refines ',AbsEvName,' in ',AbsName,
984		'\n guard: ',SameGuard,
985		'\n action: ',SameAct], Tooltip)
986		; ajoin(['Event ',Ev,' in ',M,
987		'\n status: ',Status], Tooltip)).
988		dot_refinement_node_new(variable_refinement(With),M:Var,M,[label/Desc,shape/Shape,color/Color,tooltip/Tooltip|T1]) :-
989		(With=with_constants -> machine_ids(M,Vars) ; machine_variables(M,Vars)),
990		member(Var,Vars),
991		Desc=Var,
992		(id_exists_in_abstraction(M,Anc,Var)
993		-> get_preference(dot_event_hierarchy_unchanged_event_colour,Color), T1=[style/filled],
994		Shape = rect, % we could use plain; makes kept events smaller
995		ajoin(['Variable kept from abstraction ',Anc],Tooltip)
996		; machine_type(M,context), machine_sets(M,Sets), member(Var,Sets) ->
997		get_preference(dot_event_hierarchy_refines_colour,Color), T1=[style/'rounded,filled'],
998		Shape = rect,
999		ajoin(['New set in ',M],Tooltip)
1000		; machine_type(M,context) -> % it must be a constant
1001		get_preference(dot_event_hierarchy_new_event_colour,Color), T1=[style/rounded],
1002		Shape = rect,
1003		ajoin(['New constant in ',M],Tooltip)
1004		; get_preference(dot_event_hierarchy_new_event_colour,Color), T1=[],
1005		Shape = rect,
1006		ajoin(['New variable in ',M],Tooltip)
1007		).
1008		%dot_refinement_node_new(variable_refinement(_),C:Cst,M,[label/Desc,shape/rect,color/Color,tooltip/Desc|T1]) :-
1009		% new_seen_context(M,C), machine_constants(C,Csts), member(Cst,Csts),
1010		% Desc=Cst, T1=[style/rounded], get_preference(dot_event_hierarchy_extends_colour,Color).
1011
1012		% the node ide is M:Ev as Ev can and usually does occur multiple times
1013		dot_event_node(M:Ev,M,Desc,Shape,Style,Color) :-
1014		findall(showev(M,Ev),event_to_show(M,Ev),List), sort(List,SList),
1015		member(showev(M,Ev),SList),
1016		(event_info(M,Ev,Status) -> true ; Status=unknown),
1017		(event_refinement_change(M,Ev,_,_,SameGuard,SameAction)
1018		-> true ; SameGuard=unknown, SameAction=unknown),
1019		(SameGuard=SameAction, SameGuard \= unknown -> ajoin([Ev,'\\n(',SameAction,')'],Ev2)
1020		; SameGuard=unchanged ,SameAction=extends-> ajoin([Ev,'\\n(same grd, extends act)'],Ev2)
1021		; SameGuard=unchanged -> ajoin([Ev,'\\n(same grd)'],Ev2)
1022		; SameGuard=extends,SameAction=unchanged -> ajoin([Ev,'\\n(same act, extends grd)'],Ev2)
1023		; SameAction=unchanged -> ajoin([Ev,'\\n(same act)'],Ev2)
1024		; SameGuard=extends -> ajoin([Ev,'\\n(extends grd)'],Ev2)
1025		; SameAction=extends -> ajoin([Ev,'\\n(extends act)'],Ev2)
1026		; Ev2=Ev),
1027		(Status = convergent -> ajoin([Ev2,' (<)'],Desc)
1028		; Status = anticipated -> ajoin([Ev2, ' (<=)'],Desc)
1029		; Desc=Ev2),
1030		% format(user_output,'event ~w, status:~w, same guard:~w, same action:~w~n',[Ev,Status,SameGuard,SameAction]),
1031		dot_get_color_style(M,Ev,Status,SameGuard,SameAction,Shape,Color,Style).
1032
1033		event_to_show(M,Ev) :- machine_operations(M,Evs),
1034		raw_identifier_member(Ev,Evs), Ev \= 'INITIALISATION'.
1035		event_to_show(M,Ev) :-
1036		event_refinement_change(M,Ev,_,_,_,_), % for events that disappear, i.e., are not refined until bottom level
1037		Ev \= 'INITIALISATION'.
1038
1039
1040		dot_get_color_style(M,Ev,_Status,_,_,box,Color,Style) :- \+ refines_event(M,Ev,_,_),!,
1041		get_preference(dot_event_hierarchy_new_event_colour,Color), Style=none.
1042		dot_get_color_style(M,Ev,_,SameGuard,SameAction,box,Color,Style) :-
1043		refines_event(M,Ev,_,Ev2), dif(Ev2,Ev),!, % changes name
1044		((SameGuard,SameAction)=(unchanged,unchanged)
1045		-> get_preference(dot_event_hierarchy_rename_unchanged_event_colour,Color)
1046		; get_preference(dot_event_hierarchy_rename_event_colour,Color)), Style=filled.
1047		dot_get_color_style(_M,_Ev,_,unchanged,unchanged,plain,Color,Style) :- % keeps name and adds no guard or action
1048		!,
1049		get_preference(dot_event_hierarchy_unchanged_event_colour,Color), Style=filled.
1050		dot_get_color_style(_M,_Ev,_,_,unchanged,box,Color,Style) :- % keeps name and adds no action, but modifies guard
1051		!,
1052		get_preference(dot_event_hierarchy_grd_strengthening_event_colour,Color), Style=filled.
1053		dot_get_color_style(_M,_Ev,_,unchanged,_,box,Color,Style) :- % keeps name and adds action but keeps guard
1054		!,
1055		get_preference(dot_event_hierarchy_grd_keeping_event_colour,Color), Style=filled.
1056		dot_get_color_style(_M,_Ev,_,_,_,box,Color,Style) :- % keeps name but adds or modifies
1057		% TO DO: distinguish extends from refines
1058		get_preference(dot_event_hierarchy_refines_colour,Color), Style=filled.
1059
1060		:- public dot_refines_event/4.
1061		% dot transition predicate for event and variable refinement hierarchy diagram
1062		dot_refines_event(event_refinement,M2:Ev2,M1:Ev1,[label/Label,color/Color,style/Style]) :-
1063		Label = '', % TO DO: detect refine, extends, identical
1064		refines_event(M1,Ev1,M2,Ev2),
1065		Ev1 \= 'INITIALISATION',
1066		(event_refinement_change(M1,Ev1,_,_,SameGuard,SameAct)
1067		-> arrow_style(SameGuard,SameAct,Style,ColPref), get_preference(ColPref,Color)
1068		; Style=solid, Color=red % should not happen
1069		).
1070		dot_refines_event(variable_refinement(With),M1:Var,M2:Var2,[label/Label,color/Color,style/Style|T1]) :-
1071		get_preference(dot_event_hierarchy_edge_colour,Color),
1072		(With=with_constants -> machine_ids(M2,Vars2) ; machine_variables(M2,Vars2)),
1073		if((member(Var,Vars2),
1074		id_exists_in_abstraction(M2,M1,Var)),
1075		(Label='',Var2=Var,Style=dashed, T1=[]),
1076		(% no variable of M2 exists in M1
1077		refines_or_extends_machine(M2,M1),
1078		machine_ids(M1,[Var|_]), % get first variable of M1
1079		Vars2=[Var2|_], Style=dotted, % add virtual edge to first variable of M2 if no variable is kept
1080		get_dot_cluster_name(M1,M1C), get_dot_cluster_name(M2,M2C),
1081		T1 = [ltail/M1C, lhead/M2C],
1082		(machine_type(M2,context) -> Label='extends' ; Label='')
1083		)
1084		).
1085		dot_refines_event(variable_refinement(with_constants),M1:Var1,M2:Cst2,[label/Label,color/Color,style/Style|T1]) :- Label='sees',
1086		Color=gray80, Style=solid,
1087		new_seen_context(M1,M2),
1088		machine_ids(M1,[Var1|_]),
1089		machine_ids(M2,[Cst2|_]),
1090		get_dot_cluster_name(M1,M1C), get_dot_cluster_name(M2,M2C),
1091		T1 = [ltail/M1C, lhead/M2C, dir/forward].
1092
1093		arrow_style(unchanged,unchanged,Style,ColPref) :- !,
1094		Style=arrowhead(none,solid), ColPref=dot_event_hierarchy_extends_colour.
1095		arrow_style(refines,_,Style,ColPref) :- !, Style=solid, ColPref=dot_event_hierarchy_edge_colour.
1096		arrow_style(_,refines,Style,ColPref) :- !, Style=solid, ColPref=dot_event_hierarchy_edge_colour.
1097		%arrow_style(_,_,Style) :- Style = arrowhead(vee,arrowtail(box,solid)). % we have extends
1098		arrow_style(_,_,Style,dot_event_hierarchy_extends_colour) :- Style = arrowhead(vee,solid). % we have extends
1099
1100
1101		%dot_same_rank(SameRankVals) :- machine_operations(M,Evs),
1102		% findall(M:Ev,raw_identifier_member(Ev,Evs),SameRankVals).
1103
1104		dot_subgraph(Kind,sub_graph_with_attributes(M,Attrs), filled,Colour) :-
1105		get_preference(dot_event_hierarchy_machine_colour,MColour),
1106		Attrs = [label/Label, tooltip/ToolTip],
1107		machine_operations(M,Ops),
1108		(Kind=event_refinement -> Ops=[_|_] ; true),
1109		(machine_type(M,context) -> IDS = 'csts', Colour=gray90
1110		; IDS = 'vars', Colour=MColour),
1111		(machine_ids(M,Vars)
1112		-> length(Vars,V),
1113		findall(C,new_seen_context(M,C),NewC),
1114		split_list(id_exists_in_abstraction(M),Vars,_Old,NewVars),
1115		length(NewVars,NewNr),
1116		findall(Del,(var_exists_in_abstraction(M,Del), nonmember(Del,Vars)),DelVars),
1117		length(DelVars,DelNr),
1118		(Kind=event_refinement, get_preference(dot_hierarchy_show_extra_detail,false)
1119		-> Label=M
1120		; ajoin([M,'\\n#',IDS,'=',V, ' (+',NewNr,',-', DelNr,')'],Label)
1121		),
1122		ajoin_with_sep(NewVars,',',NV),
1123		ajoin_with_sep(DelVars,',',DV),
1124		ajoin_with_sep(NewC,',',NC),
1125		ajoin(['machine ',M,'\\n#',IDS,'=',V, ' (+',NewNr,',-', DelNr,')',
1126		'\\nnew sees=',NC,
1127		'\\nnew ',IDS,'=',NV,
1128		'\\ndel ',IDS,'=',DV],ToolTip)
1129		; Label=M, ToolTip=M).
1130
1131		machine_variables(M,Vars) :- machine_identifiers(M,_Params,_Sets,AVars,CVars,_AConsts,_CConsts),
1132		append(CVars,AVars,RVars), % for Event-B: CVars=[]
1133		maplist(get_raw_identifier,RVars,Vars).
1134		%machine_constants(M,Consts) :- machine_identifiers(M,_Params,_Sets,_AVars,_CVars,AConsts,CConsts),
1135		% append(CConsts,AConsts,Raw),
1136		% maplist(get_raw_identifier,Raw,Consts).
1137		machine_ids(M,Vars) :- machine_identifiers(M,_Params,Sets,AVars,CVars,AConsts,CConsts),
1138		append([Sets,CConsts,CVars,AConsts,AVars],RVars),
1139		maplist(get_raw_identifier,RVars,Vars).
1140		machine_sets(M,Vars) :- machine_identifiers(M,_,Sets,_,_,_,_),
1141		maplist(get_raw_identifier,Sets,Vars).
1142
1143		var_exists_in_abstraction(M,Var) :-
1144		var_exists_in_abstraction(M,_Anc,Var).
1145		var_exists_in_abstraction(M,Anc,Var) :-
1146		refines_machine(M,Anc),
1147		machine_variables(Anc,AncVars),
1148		member(Var,AncVars).
1149
1150		refines_machine(M,Anc) :-
1151		machine_references(M,Refs),
1152		member(ref(refines,Anc,_),Refs).
1153
1154		% variable or constant exists in abstraction
1155		id_exists_in_abstraction(M,Var) :-
1156		id_exists_in_abstraction(M,_Anc,Var).
1157		id_exists_in_abstraction(M,Anc,Var) :-
1158		refines_or_extends_machine(M,Anc),
1159		machine_ids(Anc,AncVars),
1160		member(Var,AncVars).
1161
1162		refines_or_extends_machine(M,Anc) :-
1163		machine_references(M,Refs),
1164		(member(ref(refines,Anc,_),Refs) -> true ; member(ref(extends,Anc,_),Refs)).
1165
1166		new_seen_context(M,Context) :- machine_references(M,Refs),
1167		member(ref(sees,Context,_),Refs),
1168		\+ (member(ref(refines,Anc,_),Refs),
1169		sees_context(Anc,Context)).
1170
1171		sees_context(M,Context) :- machine_references(M,Refs), member(ref(sees,Context,_),Refs).
1172
1173
1174		write_dot_event_hierarchy_to_file(File) :-
1175		write_dot_ref_hierarchy_to_file(event_refinement,File).
1176		write_dot_variable_hierarchy_to_file(File) :-
1177		(get_preference(dot_hierarchy_show_extra_detail,false) -> With=no_constants ; With=with_constants),
1178		write_dot_ref_hierarchy_to_file(variable_refinement(With),File).
1179		write_dot_ref_hierarchy_to_file(Kind,File) :-
1180		analyze_extends_relation,
1181		(get_preference(dot_event_hierarchy_horizontal,true)
1182		-> PageOpts=[compound/true,rankdir/'LR',no_page_size]
1183		; PageOpts=[compound/true]),
1184		gen_dot_graph(File,PageOpts,
1185		use_new_dot_attr_pred(b_machine_hierarchy:dot_refinement_node_new(Kind)),
1186		use_new_dot_attr_pred(b_machine_hierarchy:dot_refines_event(Kind)),
1187		dot_no_same_rank,dot_subgraph(Kind)).
1188		%gen_dot_graph(File,PageOpts,dot_event_node,dot_refines_event,dot_no_same_rank,dot_subgraph).
1189
1190		% --------------------
1191
1192		reference_link(FromMachine,DestMachine) :-
1193		machine_references(FromMachine,Refs),
1194		filter_redundant_refs(Refs,Refs,UsefulRefs),
1195		member(ref(_Type,DestMachine,_Prefix),UsefulRefs).
1196
1197		:- use_module(library(ugraphs),[vertices_edges_to_ugraph/3, top_sort/2, transitive_closure/2,
1198		min_paths/3, min_path/5, neighbours/3, del_vertices/3]).
1199
1200		% b_machine_hierarchy:get_machine_topological_order(V)
1201		% get machine in topological order of inclusion
1202		get_machine_topological_order(SortedVertices) :-
1203		get_machine_inclusion_graph(_Vertices,_Edges,Graph),
1204		top_sort(Graph,SortedVertices).
1205
1206		% get machine inclusion graph in format for ugraphs (unweighted graphs) library
1207		get_machine_inclusion_graph(Vertices,Edges,Graph) :-
1208		findall(Mach,machine_name(Mach),Vertices),
1209		findall(From-To,reference_link(From,To),Edges),
1210		vertices_edges_to_ugraph(Vertices, Edges, Graph).
1211
1212		print_machine_topological_order :-
1213		format('Topological sorting of B machine references~n',[]),
1214		get_machine_inclusion_graph(Vertices,Edges,Graph),
1215		length(Vertices,LenV),format(' * number of machines: ~w~n',[LenV]),
1216		length(Edges,LenE), format(' * number of reference links: ~w~n',[LenE]),
1217		top_sort(Graph,SortedVertices),
1218		main_machine_name(Main),
1219		%min_paths(Main,Graph,MinPaths),
1220		transitive_closure(Graph,TGraph),
1221		maplist(top_print_machine(Main,Graph,TGraph),SortedVertices),
1222		greedy_cover(Main,Graph,TGraph,GreedyCover), length(GreedyCover,GLen),
1223		format(' * sufficient includes (~w) to cover all machines: ~w~n',[GLen,GreedyCover]).
1224
1225		top_print_machine(Main,Graph,TGraph,M) :-
1226		(machine_references(M,Refs) -> length(Refs,Len) ; Len=0),
1227		neighbours(M,TGraph,N), length(N,Len2),
1228		format(' ~w has ~w direct references and ~w indirect ones~n',[M,Len,Len2]),
1229		min_path(Main, M, Graph, Path, Length),
1230		format(' inclusion length ~w: ~w~n',[Length,Path]).
1231
1232		greedy_cover(Main,Graph,TGraph,GreedyCover) :-
1233		neighbours(Main,Graph,TopLevelIncludes),
1234		greedy_cover(TopLevelIncludes,TGraph,GreedyCover).
1235
1236		% compute a list of included machines which cover all required inclusions
1237		% we try to make this inclusion minimal, using a greedy algorithm
1238		greedy_cover([],_TGraph,[]).
1239		greedy_cover(RemainingIncludes,TGraph, GreedyCover) :-
1240		findall(candidate(NrCovered,Machine),
1241		(member(Machine,RemainingIncludes),
1242		neighbours(Machine,TGraph,N), length(N,NrCovered)), Cands),
1243		max_member(candidate(MaxNrCov,NextChoice),Cands), % pick the
1244		(MaxNrCov =< 0
1245		-> GreedyCover = [] % everything is included already
1246		; GreedyCover = [NextChoice|TGreedyCover],
1247		select(NextChoice,RemainingIncludes,Rem2), % this include is no longer available
1248		neighbours(NextChoice,TGraph,NowCovered),
1249		del_vertices(TGraph, [NextChoice|NowCovered], TGraph2), % delete all machines included by NextChoice
1250		greedy_cover(Rem2,TGraph2,TGreedyCover)
1251		).
1252