mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-19 13:07:55 +00:00
124 lines
2.8 KiB
C++
124 lines
2.8 KiB
C++
/*
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* ZeroTier One - Global Peer to Peer Ethernet
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* Copyright (C) 2012-2013 ZeroTier Networks LLC
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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 3 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, see <http://www.gnu.org/licenses/>.
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*
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* --
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*
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* ZeroTier may be used and distributed under the terms of the GPLv3, which
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* are available at: http://www.gnu.org/licenses/gpl-3.0.html
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*
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* If you would like to embed ZeroTier into a commercial application or
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* redistribute it in a modified binary form, please contact ZeroTier Networks
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* LLC. Start here: http://www.zerotier.com/
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*/
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#ifndef _ZT_RANGE_HPP
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#define _ZT_RANGE_HPP
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namespace ZeroTier {
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/**
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* A range of numeric values
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*
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* @tparam T Type, can be any numeric value (int, float, double, etc.)
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*/
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template<typename T>
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class Range
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{
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public:
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/**
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* Construct an empty range
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*/
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Range()
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throw() :
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start(0),
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end(0)
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{
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}
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/**
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* @param s Starting value (inclusive)
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* @param e Ending value (exclusive)
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*/
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Range(T s,T e)
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throw() :
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start(s),
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end(e)
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{
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}
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/**
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* Construct a range containing from n to n+1 (thus only n for integers)
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*
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* @param n Number to contain
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*/
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Range(T n)
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throw() :
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start(n),
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end(n+1)
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{
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}
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/**
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* @return end - start
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*/
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inline T magnitude() const
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throw()
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{
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return (end - start);
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}
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/**
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* @return True if range contains something (magnitude is nonzero)
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*/
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inline operator bool() const
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throw()
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{
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return (end > start);
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}
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/**
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* @param v Value to test
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* @return True if value is between start (inclusive) and end (exclusive)
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*/
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inline bool operator()(const T &v) const
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throw()
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{
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return ((v >= start)&&(v < end));
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}
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inline bool operator==(const Range &r) const throw() { return ((start == r.start)&&(end == r.end)); }
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inline bool operator!=(const Range &r) const throw() { return (!(*this == r)); }
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inline bool operator<(const Range &r) const throw() { return ((start < r.start) ? true : ((start == r.start) ? (end < r.end) : false)); }
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inline bool operator>(const Range &r) const throw() { return (r < *this); }
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inline bool operator<=(const Range &r) const throw() { return !(r < *this); }
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inline bool operator>=(const Range &r) const throw() { return !(*this < r); }
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/**
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* Start of range (may be modified directly)
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*/
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T start;
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/**
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* End of range (may be modified directly)
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*/
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T end;
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};
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} // namespace ZeroTier
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#endif
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