copy SWI missing library

swi/library/pio.pl

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+/*  Part of SWI-Prolog
+
+    Author:        Jan Wielemaker
+    E-mail:        J.Wielemaker@uva.nl
+    WWW:           http://www.swi-prolog.org
+    Copyright (C): 2008, University of Amsterdam
+
+    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
+
+    As a special exception, if you link this library with other files,
+    compiled with a Free Software compiler, to produce an executable, this
+    library does not by itself cause the resulting executable to be covered
+    by the GNU General Public License. This exception does not however
+    invalidate any other reasons why the executable file might be covered by
+    the GNU General Public License.
+*/
+
+:- module(pio, []).
+:- reexport(pure_input).
+
+/** <module> Pure I/O
+
+This library provides pure list-based I/O   processing for Prolog, where
+the communication to the actual I/O   device  is performed transparently
+through coroutining. This module itself  is   just  an  interface to the
+actual implementation modules.
+
+@author Ulrich Neumerkel
+@author Jan Wielemaker
+*/