86 lines
2.6 KiB
C++
Executable File
86 lines
2.6 KiB
C++
Executable File
// Copyright (c) 1997
|
|
// Utrecht University (The Netherlands),
|
|
// ETH Zurich (Switzerland),
|
|
// INRIA Sophia-Antipolis (France),
|
|
// Max-Planck-Institute Saarbruecken (Germany),
|
|
// 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; either version 3 of the License,
|
|
// or (at your option) any later version.
|
|
//
|
|
// 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.
|
|
//
|
|
// $URL$
|
|
// $Id$
|
|
// SPDX-License-Identifier: LGPL-3.0+
|
|
//
|
|
//
|
|
// Author(s) : Lutz Kettner <kettner@inf.ethz.ch>
|
|
|
|
#ifndef CGAL_IO_ISTREAM_ITERATOR_H
|
|
#define CGAL_IO_ISTREAM_ITERATOR_H
|
|
|
|
#include <CGAL/circulator.h>
|
|
|
|
namespace CGAL {
|
|
|
|
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;
|
|
}
|
|
};
|
|
|
|
} //namespace CGAL
|
|
|
|
#endif // CGAL_IO_ISTREAM_ITERATOR_H
|