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https://github.com/rakshasa/rtorrent.git
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rakshasa
da764db3b9
git-svn-id: svn://rakshasa.no/libtorrent/trunk/rtorrent@348 e378c898-3ddf-0310-93e7-cc216c733640
81 lines
2.0 KiB
C++
81 lines
2.0 KiB
C++
// rTorrent - BitTorrent client
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// Copyright (C) 2005, Jari Sundell
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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// Contact: Jari Sundell <jaris@ifi.uio.no>
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//
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// Skomakerveien 33
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// 3185 Skoppum, NORWAY
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#ifndef RTORRENT_UTILS_ALGORITHM_H
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#define RTORRENT_UTILS_ALGORITHM_H
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#include <algorithm>
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namespace rak {
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template <typename _InputIter, typename _Function>
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_Function
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for_each_pre(_InputIter __first, _InputIter __last, _Function __f) {
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_InputIter __tmp;
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while (__first != __last) {
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__tmp = __first++;
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__f(*__tmp);
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}
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return __f;
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}
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// Return a range with a distance of no more than __distance and
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// between __first and __last, centered on __middle1.
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template <typename _InputIter, typename _Distance>
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std::pair<_InputIter, _InputIter>
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advance_bidirectional(_InputIter __first, _InputIter __middle1, _InputIter __last, _Distance __distance) {
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_InputIter __middle2 = __middle1;
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do {
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if (!__distance)
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break;
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if (__middle1 != __first) {
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--__middle1;
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--__distance;
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} else if (__middle2 == __last) {
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break;
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}
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if (!__distance)
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break;
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if (__middle2 != __last) {
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++__middle2;
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--__distance;
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} else if (__middle1 == __first) {
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break;
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}
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} while (true);
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return std::make_pair(__middle1, __middle2);
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}
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}
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#endif
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