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yap-6.3/packages/ProbLog/problog/os.yap
2015-04-24 10:03:44 -06:00

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Prolog

%%% -*- Mode: Prolog; -*-
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% $Date: 2011-11-28 14:41:26 +0100 (Mon, 28 Nov 2011) $
% $Revision: 6764 $
%
% This file is part of ProbLog
% http://dtai.cs.kuleuven.be/problog
%
% ProbLog was developed at Katholieke Universiteit Leuven
%
% Copyright 2008, 2009, 2010
% Katholieke Universiteit Leuven
%
% Main authors of this file:
% Theofrastos Mantadelis, Bernd Gutmann
%
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% Artistic License 2.0
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%
% Collected OS depended instructions
%%%%%%%%
:- module(os, [set_problog_path/1,
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]).
% load library modules
:- use_module(library(system), [exec/3, file_exists/1,wait/2, md5/3]).
:- use_module(library(lists), [memberchk/2]).
:- yap_flag(arithmetic_exceptions, false).
% load our own modules
:- use_module(gflags, _, [flag_get/2]).
:- dynamic(problog_path/1).
:- dynamic(problog_working_path/1).
%========================================================================
%=
%=
%=
%========================================================================
set_problog_path( _Path):-
retractall(problog_path(_)),
getenv('PATH',Dirs),
path_grouping( PathSep ),
atomic_list_concat( LPaths, PathSep, Dirs),
set_problog_paths( LPaths ),
fail.
set_problog_path(Path):-
path_separator( S ),
sub_atom(Path, _, 1, 0, S), !,
sub_atom(Path, _, _, 1, Path0),
asserta(problog_path(Path0)).
set_problog_path(Path):-
asserta(problog_path(Path)).
set_problog_paths( [Path|Paths] ) :-
assertz(problog_path(Path)),
set_problog_paths( Paths ).
set_problog_paths( [] ).
%========================================================================
%=
%=
%=
%========================================================================
convert_filename_to_working_path(File_Name, Path):-
flag_get(dir, Dir),
concat_path_with_filename(Dir, File_Name, Path).
convert_filename_to_problog_path(File_Name, Path):-
problog_path(Dir),
concat_path_with_filename(Dir, File_Name, Path),
catch(file_exists(Path), _, fail).
%========================================================================
%=
%=
%=
%========================================================================
concat_path_with_filename(Path, File_Name, Result):-
path_separator(Path_Seperator),
atomic_list_concat([Path, Path_Seperator, File_Name], Result).
%========================================================================
%= Calculate the MD5 checksum of +Filename by calling md5sum
%= in case m5sum is not installed, try md5, otherwise fail
%= +Filename, -MD5
%========================================================================
calc_md5(Filename,MD5):-
catch(calc_md5_intern(Filename,MD5),_,fail),
!.
calc_md5(Filename,MD5):-
throw(md5error(calc_md5(Filename,MD5))).
calc_md5_intern(Filename,MD5) :-
( file_exists(Filename) -> true ; throw(md5_file(Filename)) ),
file_to_codes(Filename, S, []),
md5( S, MD5, [] ),
format('~s => ~s~n', [S,MD5]).
file_to_codes( F, Codes, LF ) :-
open(F, read, S),
get_codes( S, Codes, LF).
get_codes(S, [C|L], LF) :-
get_code(S, C),
C \= -1,
!,
get_codes(S, L, LF).
get_codes(_, LF, LF).
%========================================================================
%=
%=
%=
%========================================================================
check_existance(FileName):-
convert_filename_to_problog_path(FileName, Path),
catch(file_exists(Path), _, fail), !.
check_existance(FileName):-
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).
path_grouping(PathSep) :-
( current_prolog_flag( windows, true ) -> PathSep = ';' ; PathSep = ':' ).
path_separator('\\') :-
current_prolog_flag( windows, true ).
path_separator('/').