mirror of
https://github.com/qbittorrent/qBittorrent.git
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e099f6ad33
Add const to IndexRange private members. Remove redundant inline specifier. Add missing parentheses.
130 lines
3.2 KiB
C++
130 lines
3.2 KiB
C++
/*
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* Bittorrent Client using Qt and libtorrent.
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* Copyright (C) 2016 Eugene Shalygin
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* In addition, as a special exception, the copyright holders give permission to
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* link this program with the OpenSSL project's "OpenSSL" library (or with
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* modified versions of it that use the same license as the "OpenSSL" library),
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* and distribute the linked executables. You must obey the GNU General Public
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* License in all respects for all of the code used other than "OpenSSL". If you
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* modify file(s), you may extend this exception to your version of the file(s),
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* but you are not obligated to do so. If you do not wish to do so, delete this
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* exception statement from your version.
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*/
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#ifndef QBT_INDEXRANGE_H
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#define QBT_INDEXRANGE_H
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#include <QtGlobal>
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// Interval is defined via [first;last]
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template <typename Index>
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class IndexInterval
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{
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public:
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using IndexType = Index;
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IndexInterval(IndexType first, IndexType last) // add constexpr when using C++14
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: m_first {first}
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, m_last {last}
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{
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Q_ASSERT(first <= last);
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}
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constexpr IndexType first() const
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{
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return m_first;
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}
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constexpr IndexType last() const
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{
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return m_last;
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}
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private:
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const IndexType m_first;
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const IndexType m_last;
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};
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template <typename T>
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constexpr IndexInterval<T> makeInterval(T first, T last)
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{
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return {first, last};
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}
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// range is defined via first index and size
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template <typename Index, typename IndexDiff = Index>
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class IndexRange
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{
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public:
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using IndexType = Index;
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using IndexDiffType = IndexDiff;
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constexpr IndexRange()
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: m_first {0}
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, m_size {0}
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{
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}
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constexpr IndexRange(IndexType first, IndexDiffType size)
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: m_first {first}
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, m_size {size}
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{
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}
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constexpr IndexRange(const IndexInterval<IndexType> &interval)
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: m_first {interval.first()}
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, m_size {interval.last() - interval.first() + 1}
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{
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}
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constexpr IndexType begin() const
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{
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return m_first;
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}
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constexpr IndexType end() const
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{
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return (m_first + m_size);
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}
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constexpr IndexDiffType size() const
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{
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return m_size;
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}
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constexpr IndexType first() const
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{
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return m_first;
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}
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constexpr IndexType last() const
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{
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return (m_first + m_size - 1);
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}
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constexpr bool isEmpty() const
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{
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return (m_size == 0);
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}
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private:
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IndexType m_first;
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IndexDiffType m_size;
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};
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#endif // QBT_INDEXRANGE_H
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