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%%% -*- Mode: Prolog; -*-
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
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% $Date: 2011-11-28 14:41:26 +0100 (Mon, 28 Nov 2011) $
% $Revision: 6764 $
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%
% This file is part of ProbLog
% http://dtai.cs.kuleuven.be/problog
%
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% ProbLog was developed at Katholieke Universiteit Leuven
%
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% Copyright 2008, 2009, 2010
% Katholieke Universiteit Leuven
%
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% Main authors of this file:
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% Theofrastos Mantadelis, Bernd Gutmann
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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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%%%%%%%%
% Collected OS depended instructions
%%%%%%%%
:- module(os, [set_problog_path/1,
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problog_path/1,
convert_filename_to_working_path/2,
convert_filename_to_problog_path/2,
concat_path_with_filename/3,
concat_path_with_filename2/3,
split_path_file/3,
check_existance/1,
calc_md5/2]).
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% load library modules
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:- use_module(library(system), [exec/3, file_exists/1,wait/2]).
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:- use_module(library(lists), [memberchk/2]).
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% load our own modules
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:- use_module(gflags, _, [flag_get/2]).
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:- dynamic(problog_path/1).
:- dynamic(problog_working_path/1).
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%========================================================================
%=
%=
%=
%========================================================================
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set_problog_path(Path):-
retractall(problog_path(_)),
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assertz(problog_path(Path)).
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%========================================================================
%=
%=
%=
%========================================================================
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convert_filename_to_working_path(File_Name, Path):-
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flag_get(dir, Dir),
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concat_path_with_filename(Dir, File_Name, Path).
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convert_filename_to_problog_path(File_Name, Path):-
problog_path(Dir),
concat_path_with_filename(Dir, File_Name, Path).
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%========================================================================
%=
%=
%=
%========================================================================
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concat_path_with_filename(Path, File_Name, Result):-
nonvar(File_Name),
nonvar(Path),
% make sure, that there is no path delimiter at the end
prolog_file_name(Path,Path_Absolute),
path_seperator(Path_Seperator),
atomic_concat([Path_Absolute, Path_Seperator, File_Name], Result).
concat_path_with_filename2(Path, File_Name, Result):-
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nonvar(File_Name),
nonvar(Path),
path_seperator(Path_Seperator),
(atomic_concat(Path_Absolute, Path_Seperator, Path) ; Path_Absolute = Path),
atomic_concat([Path_Absolute, Path_Seperator, File_Name], Result).
%========================================================================
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%= Calculate the MD5 checksum of +Filename by calling md5sum
%= in case m5sum is not installed, try md5, otherwise fail
%= +Filename, -MD5
%========================================================================
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calc_md5(Filename,MD5):-
catch(calc_md5_intern(Filename,'md5sum',MD5),_,fail),
!.
calc_md5(Filename,MD5):-
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catch(calc_md5_intern(Filename,'md5 -r',MD5),_,fail),
% used in Mac OS
% the -r makes the output conform with md5sum
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!.
calc_md5(Filename,MD5):-
throw(md5error(calc_md5(Filename,MD5))).
calc_md5_intern(Filename,Command,MD5) :-
( file_exists(Filename) -> true ; throw(md5_file(Filename)) ),
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atomic_concat([Command,' "',Filename,'"'],Call),
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% execute the md5 command
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exec(Call,[null,pipe(S),null],PID),
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bb_put(calc_md5_temp,End-End), % use difference list
bb_put(calc_md5_temp2,0),
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
( % read 32 Bytes from stdout of process
repeat,
get_code(S,C),
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(
C== -1
->
(
close(S),
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wait(PID,_Status),
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throw(md5error('premature end of output stream, please check os.yap calc_md5/2'))
);
true
),
bb_get(calc_md5_temp,List-[C|NewEnd]),
bb_put(calc_md5_temp,List-NewEnd),
bb_get(calc_md5_temp2,OldLength),
NewLength is OldLength+1,
bb_put(calc_md5_temp2,NewLength),
NewLength=32
),
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
!,
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close(S),
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wait(PID,_Status),
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bb_delete(calc_md5_temp, FinalList-[]),
bb_delete(calc_md5_temp2,_),
atom_codes(MD5,FinalList).
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%========================================================================
%=
%=
%=
%========================================================================
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path_seperator('\\'):-
yap_flag(windows, true), !.
path_seperator('/').
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%========================================================================
%=
%=
%=
%========================================================================
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split_path_file(PathFile, Path, File):-
path_seperator(PathSeperator),
name(PathSeperator, [PathSeperatorName]),
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atomic_concat(Path, File, PathFile),
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name(File, FileName),
\+ memberchk(PathSeperatorName, FileName),
!.
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%========================================================================
%=
%=
%=
%========================================================================
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check_existance(FileName):-
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convert_filename_to_problog_path(FileName, Path),
catch(file_exists(Path), _, fail).
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check_existance(FileName):-
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problog_path(PD),
write(user_error, 'WARNING: Can not find file: '), write(user_error, FileName),
write(user_error, ', please place file in problog path: '), write(user_error, PD), nl(user_error).