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LoopReader is a
template class to iterate
through a container. If the container's end is
reached, however, LoopReader starts reading
from the beginning again.
loopreader.h
//---------------------------------------------------------------------------
/*
LoopReader, class that reads a sequence looped
Copyright (C) 2010-2011 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 <string>
#include <vector>
//---------------------------------------------------------------------------
// 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
{
LoopReader(const Iterator begin, const Iterator end)
: begin_(begin),
end_(end),
read_(begin)
{
}
const Iterator Read() const { return read_; }
void Next()
{
++read_;
if (read_ == end_) read_ = begin_;
}
static const std::string GetVersion()
{
return "1.1";
}
static const std::vector<std::string> GetVersionHistory()
{
std::vector<std::string> v;
v.push_back("2009-08-26: Version 1.0: initial version");
v.push_back("2011-03-06: Version 1.1: added GetVersion and GetVersionHistory methods");
return v;
}
private:
const Iterator begin_;
const Iterator end_;
Iterator read_;
};
//---------------------------------------------------------------------------
#endif // LOOPREADER_H
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