yap-6.3/packages/ProbLog/problog/bdd.yap

%%% -*- Mode: Prolog; -*-
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%  $Date: 2011-11-28 14:41:26 +0100 (Mon, 28 Nov 2011) $
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%  Theofrastos Mantadelis
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Prolog interface for simplecudd
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

:-use_module(library(system)).
:- dynamic bdd_curinter/1.

bdd_init(FDO, PID):-
  pid(MYPID),
  convert_filename_to_problog_path('simplecudd', Simplecudd),
  atomic_concat([Simplecudd, ' -o -pid ', MYPID], C),
  exec(C, [pipe(FDO), std, std], PID).

bdd_init(FDO, FDI, PID):-
  pid(MYPID),
  convert_filename_to_problog_path('simplecudd', Simplecudd),
  atomic_concat([Simplecudd, ' -o -m o -pid ', MYPID], C),
  exec(C, [pipe(FDO), pipe(FDI), std], PID).

bdd_commit(FDO, LINE):-
  write(FDO, LINE),
  write(FDO, '\n'),
  flush_output(FDO).

bdd_kill(FDO, PID, S):-
  bdd_commit(FDO, '@e'),
  wait(PID, S),
  close(FDO).

bdd_kill(FDO, FDI, PID, S):-
  bdd_commit(FDO, '@e'),
  wait(PID, S),
  close(FDO),
  close(FDI).

bdd_line([], X, _, L):-
  atomic(X),
  X \= [],
  (bdd_curinter(N) ->
    retract(bdd_curinter(N))
  ;
    N = 1
  ),
  M is N + 1,
  assert(bdd_curinter(M)),
  atomic_concat(['L', N, '=', X], L).

bdd_line(L, X, O, NL):-
  atomic(X),
  X \= [],
  atom(L),
  L \= [],
  atomic_concat([L, O, X], NL).

bdd_line(L, [], _, L):-!.

bdd_line(L, [X|T], O, R):-
  bdd_line(L, X, O, NL),
  bdd_line(NL, T, O, R).

bdd_AND(L, X, NL):-
  bdd_line(L, X, '*', NL).
bdd_OR(L, X, NL):-
  bdd_line(L, X, '+', NL).
bdd_XOR(L, X, NL):-
  bdd_line(L, X, '#', NL).
bdd_NAND(L, X, NL):-
  bdd_line(L, X, '~*', NL).
bdd_NOR(L, X, NL):-
  bdd_line(L, X, '~+', NL).
bdd_XNOR(L, X, NL):-
  bdd_line(L, X, '~#', NL).

bdd_not(X, NX):-
  atomic(X),
  atomic_concat(['~', X], NX).

bdd_laststep(L):-
  bdd_curinter(N),
  M is N - 1,
  atomic_concat(['L', M], L),
  !.

bdd_nextDFS(FDO):-
  bdd_commit(FDO, '@n').

bdd_reset(FDO):-
  bdd_commit(FDO, '@r').

bdd_nextBFS(FDO):-
  bdd_commit(FDO, '@n,BFS').

bdd_ignoreDFS(FDO) :-
  bdd_commit(FDO, '@t').

bdd_current(FDO, FDI, N, Qcnt, NodeId):-
  bdd_commit(FDO, '@c'),
  read(FDI, F),
  assert(F),
  bdd_temp_value(N, Qcnt, NodeId),
  retract(F).

bdd_highnodeof(FDO, FDI, H):-
  bdd_commit(FDO, '@h'),
  read(FDI, F),
  assert(F),
  bdd_temp_value(H),
  retract(F).

bdd_lownodeof(FDO, FDI, L):-
  bdd_commit(FDO, '@l'),
  read(FDI, F),
  assert(F),
  bdd_temp_value(L),
  retract(F).

bdd_nodevaluesof(FDO, FDI, N, V):-
  atomic_concat(['@v,', N], Q),
  bdd_commit(FDO, Q),
  read(FDI, F),
  assert(F),
  bdd_temp_value(V),
  retract(F).

nodevalues(_, _, 'TRUE', [1.0, 1, '(null)']):-!.
nodevalues(_, _, 'FALSE', [0.0, 0, '(null)']):-!.
nodevalues(FDO, FDI, N, V):-
  bdd_nodevaluesof(FDO, FDI, N, V).

bdd_leaf('TRUE'):-!.
bdd_leaf('FALSE'):-!.