/usr/include/ql/time/daycounters/simpledaycounter.hpp is in libquantlib0-dev 1.12-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/*
Copyright (C) 2003 RiskMap srl
This file is part of QuantLib, a free-software/open-source library
for financial quantitative analysts and developers - http://quantlib.org/
QuantLib is free software: you can redistribute it and/or modify it
under the terms of the QuantLib license. You should have received a
copy of the license along with this program; if not, please email
<quantlib-dev@lists.sf.net>. The license is also available online at
<http://quantlib.org/license.shtml>.
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 license for more details.
*/
/*! \file simpledaycounter.hpp
\brief Simple day counter for reproducing theoretical calculations
*/
#ifndef quantlib_simple_day_counter_hpp
#define quantlib_simple_day_counter_hpp
#include <ql/time/daycounter.hpp>
namespace QuantLib {
//! Simple day counter for reproducing theoretical calculations.
/*! This day counter tries to ensure that whole-month distances
are returned as a simple fraction, i.e., 1 year = 1.0,
6 months = 0.5, 3 months = 0.25 and so forth.
\warning this day counter should be used together with
NullCalendar, which ensures that dates at whole-month
distances share the same day of month. It is <b>not</b>
guaranteed to work with any other calendar.
\ingroup daycounters
\test the correctness of the results is checked against known
good values.
*/
class SimpleDayCounter : public DayCounter {
private:
class Impl : public DayCounter::Impl {
public:
std::string name() const { return "Simple"; }
Date::serial_type dayCount(const Date& d1,
const Date& d2) const;
Time yearFraction(const Date& d1,
const Date& d2,
const Date&,
const Date&) const;
};
public:
SimpleDayCounter()
: DayCounter(boost::shared_ptr<DayCounter::Impl>(
new SimpleDayCounter::Impl())) {}
};
}
#endif
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