393 lines
15 KiB
Prolog
393 lines
15 KiB
Prolog
%%% -*- Mode: Prolog; -*-
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% $Date: 2010-12-15 15:52:58 +0100 (Wed, 15 Dec 2010) $
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% $Revision: 5144 $
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%
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% This file is part of ProbLog
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% http://dtai.cs.kuleuven.be/problog
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%
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% ProbLog was developed at Katholieke Universiteit Leuven
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%
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% Copyright 2008, 2009, 2010
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% Katholieke Universiteit Leuven
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%
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% Main authors of this file:
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% Bernd Gutmann
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%
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% Artistic License 2.0
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%
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% Copyright (c) 2000-2006, The Perl Foundation.
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%
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% Everyone is permitted to copy and distribute verbatim copies of this
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% This license establishes the terms under which a given free software
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% keeping the Package available as open source and free software.
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% You are always permitted to make arrangements wholly outside of this
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% license directly with the Copyright Holder of a given Package. If the
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% Permission for Use and Modification Without Distribution
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% ensure that your Modified Version complies with the requirements of
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% OF THE PACKAGE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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%
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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:- module(utils, [delete_file_silently/1,
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delete_files_silently/1,
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delete_file_pattern_silently/2,
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variable_in_term_exactly_once/2,
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slice_n/4,
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sorted_overlap_test/2,
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prefix_bdd_file_with_header/4,
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split_list/3,
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succeeds_n_times/2,
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sum_forall/3]).
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:- use_module(library(system), [delete_file/1]).
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% load our own modules
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:- use_module(os).
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:- meta_predicate succeeds_n_times(0,?), sum_forall(?,:,?).
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%========================================================================
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%= deletes File, if it doesn't exists, it will succeed silently
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%= delete_file_silently(+File)
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%========================================================================
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delete_file_silently(File) :-
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catch(delete_file(File),_,fail),
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!.
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delete_file_silently(_).
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%========================================================================
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%= delete all the files in the list silently
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%= delete_files_silently(+List)
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%========================================================================
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delete_files_silently([]).
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delete_files_silently([H|T]) :-
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delete_file_silently(H),
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delete_files_silently(T).
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%========================================================================
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%= delete all the files matching a certain pattern silently
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%= i.e. delete_file_pattern_silently('~/a_path/b_path/','*.txt')
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%=
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%= delete_file_pattern_silently(+Path,+Pattern)
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%========================================================================
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delete_file_pattern_silently(Path,Pattern) :-
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concat_path_with_filename(Path,Pattern,AbsolutePattern),
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expand_file_name(AbsolutePattern,Files),
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delete_files_silently(Files).
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%========================================================================
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%= Split a list into the first n elements and the tail
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%= slice_n(+List, +Integer, -Prefix, -Residuum)
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%========================================================================
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slice_n([],_,[],[]) :-
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!.
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slice_n([H|T],N,[H|T2],T3) :-
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N>0,
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!,
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N2 is N-1,
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slice_n(T,N2,T2,T3).
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slice_n(L,0,[],L).
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%========================================================================
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%= succeeds if the variable V appears exactly once in the term T
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%========================================================================
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variable_in_term_exactly_once(T,V) :-
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term_variables(T,Vars),
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var_memberchk_once(Vars,V).
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var_memberchk_once([H|T],V) :-
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H==V,
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!,
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var_memberchk_none(T,V).
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var_memberchk_once([_|T],V) :-
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var_memberchk_once(T,V).
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var_memberchk_none([H|T],V) :-
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H\==V,
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var_memberchk_none(T,V).
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var_memberchk_none([],_).
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%========================================================================
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%= sorted_overlap_test(+L1,+L2)
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%= L1 and L2 are ground sorted lists
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%= the predicate is true if there is an element X both appearing in L1 and L2
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%========================================================================
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sorted_overlap_test([H|_],[H|_]) :-
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!.
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sorted_overlap_test([H1|T1],[H2|T2]) :-
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H1 @> H2,
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!,
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sorted_overlap_test([H1|T1],T2).
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sorted_overlap_test([_|T1],[H2|T2]) :-
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sorted_overlap_test(T1,[H2|T2]).
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%========================================================================
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%= TmpFile is the file name that contains the "body" of a SimpleCUDD
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%= script file. This predicate creates a new file BDD_File_Name that
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%= starts with the right header and contains the body. The body file
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%= is deleted afterwards.
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%=
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%= prefix_bdd_file_with_header(+BDD_File_Name,+VarCount,+IntermediateSteps,+TmpFile)
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%========================================================================
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prefix_bdd_file_with_header(BDD_File_Name,VarCount,IntermediateSteps,TmpFile) :-
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open(BDD_File_Name,write,H),
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% this is the header of the BDD script for problogbdd
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format(H, '@BDD1~n~w~n0~n~w~n',[VarCount,IntermediateSteps]),
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% append the content of the file TmpFile
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open(TmpFile,read,H2),
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(
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repeat,
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get_byte(H2,C),
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put_byte(H,C),
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at_end_of_stream(H2),
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!
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),
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close(H2),
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close(H),
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delete_file_silently(TmpFile).
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%========================================================================
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%= Split the list L in the two lists L1 and L2 such that
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%= append(L1,L2,L) holds.
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%=
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%= if length of L is even, then L1 and L2 will have the same length
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%= if length of L is odd, then L1 will be one element longer than L2
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%=
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%= split_list(+L,-L1,-L2)
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%========================================================================
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split_list([],[],[]).
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split_list([H|T],L1,L2) :-
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length([H|T],Len),
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Len1 is integer(Len/2+0.5),
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split_list_intern(Len1,[H|T],L1,L2).
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split_list_intern(0,L,[],L).
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split_list_intern(N,[H|T],[H|T1],L) :-
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N>0,
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N2 is N-1,
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split_list_intern(N2,T,T1,L).
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%========================================================================
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%= Counts how often Goal succeeds
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%= (taken from the YAP manual)
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%========================================================================
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succeeds_n_times(Goal, Times) :-
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Counter = counter(0),
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( Goal,
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arg(1, Counter, N0),
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N is N0 + 1,
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nb_setarg(1, Counter, N),
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fail
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; arg(1, Counter, Times)
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).
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%========================================================================
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%=
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%=
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%========================================================================
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sum_forall(X,Goal, Sum) :-
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Temp = sum(0),
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( Goal,
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arg(1, Temp, Sum0),
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Sum is Sum0+X,
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nb_setarg(1, Temp, Sum),
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fail
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; arg(1, Temp, Sum)
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). |