diff cpack/dml/lib/queries.pl @ 0:718306e29690 tip

commiting public release

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cpack/dml/lib/queries.pl	Tue Feb 09 21:05:06 2016 +0100
@@ -0,0 +1,47 @@
+/* Part of DML (Digital Music Laboratory)
+	Copyright 2014-2015 Samer Abdallah, University of London
+	 
+	This program is free software; you can redistribute it and/or
+	modify it under the terms of the GNU General Public License
+	as published by the Free Software Foundation; either version 2
+	of the License, or (at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public
+	License along with this library; if not, write to the Free Software
+	Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+:- module(queries, 
+      [  with_output_to_pengine/1
+      ,  write_html/1
+      ]).
+
+:- use_module(library(pengines)).
+:- use_module(library(http/html_write)).
+:- use_module(library(apply_macros)).
+:- use_module(library(dcg_core)).
+
+sandbox:safe_primitive(html_write:print_html(_)).
+sandbox:safe_primitive(flush_output).
+sandbox:safe_meta(html_write:html(_,_,_),[]).
+
+:- meta_predicate 
+      with_output_to_pengine(0), 
+      write_html(:).
+
+with_output_to_pengine(Goal) :-
+   with_output_to(atom(Reply), in_pre(Goal)),
+      % catch( Goal, Ex, 
+      %    in_pre((message_to_string(Ex,S),format(S))))),
+   (Reply='' -> true; pengine_output(Reply)).
+
+write_html(P) :-
+   html(P,Toks,[]),
+   print_html(Toks),
+   flush_output.
+