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// Copyright (c) 1997 Utrecht University (The Netherlands),
// ETH Zurich (Switzerland), Freie Universitaet Berlin (Germany),
// INRIA Sophia-Antipolis (France), Martin-Luther-University Halle-Wittenberg
// (Germany), Max-Planck-Institute Saarbruecken (Germany), RISC Linz (Austria),
// and Tel-Aviv University (Israel). All rights reserved.
//
// This file is part of CGAL (www.cgal.org); you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; version 2.1 of the License.
// See the file LICENSE.LGPL distributed with CGAL.
//
// Licensees holding a valid commercial license may use this file in
// accordance with the commercial license agreement provided with the software.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
//
// $URL: svn+ssh://scm.gforge.inria.fr/svn/cgal/branches/CGAL-3.5-branch/Stream_support/include/CGAL/IO/Istream_iterator.h $
// $Id: Istream_iterator.h 28567 2006-02-16 14:30:13Z lsaboret $
//
//
// Author(s) : Lutz Kettner <kettner@inf.ethz.ch>
#ifndef CGAL_IO_ISTREAM_ITERATOR_H
#define CGAL_IO_ISTREAM_ITERATOR_H
#include <CGAL/circulator.h>
CGAL_BEGIN_NAMESPACE
template <class T, class Stream>
class Istream_iterator {
protected:
Stream* stream;
T value;
void read() {
if ( stream) {
if ( *stream) {
*stream >> value;
if ( ! *stream)
stream = 0;
} else
stream = 0;
}
}
public:
typedef T value_type;
typedef const T& reference;
typedef const T& const_reference;
typedef const T* pointer;
typedef const T* const_pointer;
typedef std::size_t size_type;
typedef std::ptrdiff_t difference_type;
typedef std::input_iterator_tag iterator_category;
typedef Istream_iterator<T,Stream> Self;
Istream_iterator() : stream(0) {}
Istream_iterator( Stream& s) : stream(&s) { read(); }
bool operator==( const Self& i) const {
return stream == i.stream;
}
bool operator!=( const Self& i) const {
return stream != i.stream;
}
reference operator*() const { return value; }
#ifdef CGAL_ARROW_OPERATOR
pointer operator->() const { return &(operator*()); }
#endif
Self& operator++() {
read();
return *this;
}
Self operator++(int) {
Self tmp = *this;
read();
return tmp;
}
};
CGAL_END_NAMESPACE
#endif // CGAL_IO_ISTREAM_ITERATOR_H
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