//---------------------------------------------------------------------------
/*
LoopReader, class that reads a sequence looped
Copyright (C) 2010-2015 Richel Bilderbeek
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
//---------------------------------------------------------------------------
// From http://www.richelbilderbeek.nl/CppLoopReader.htm
//---------------------------------------------------------------------------
#ifndef LOOPREADER_H
#define LOOPREADER_H
#include <cassert>
#include <string>
#include <vector>
namespace ribi {
// From http://www.richelbilderbeek.nl/CppLoopReader.htm
//Reads a container in a loop:
// when the end is reached, it starts
// reading from the beginning again
template <class Iterator>
struct LoopReader
{
explicit LoopReader(const Iterator begin, const Iterator end)
: m_begin(begin),
m_end(end),
m_cur(begin)
{
assert(m_begin != m_end);
}
const Iterator Read() const noexcept { return m_cur; }
void Next() noexcept
{
assert(m_cur != m_end);
++m_cur;
if (m_cur == m_end) m_cur = m_begin;
}
static std::string GetVersion() noexcept
{
return "1.2";
}
static std::vector<std::string> GetVersionHistory() noexcept
{
return {
"2009-08-26: Version 1.0: initial version",
"2011-03-06: Version 1.1: added GetVersion and GetVersionHistory member functions",
"2013-11-25: Version 1.2: added some asserts, added noexcept"
};
}
private:
const Iterator m_begin;
const Iterator m_end;
//The current address to read
Iterator m_cur;
};
} //~namespace ribi
#endif // LOOPREADER_H
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