/usr/include/ql/utilities/dataformatters.hpp is in libquantlib0-dev 1.7.1-1.
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) 2005, 2009 StatPro Italia 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 dataformatters.hpp
\brief output manipulators
*/
#ifndef quantlib_data_formatters_hpp
#define quantlib_data_formatters_hpp
#include <ql/utilities/null.hpp>
#include <iosfwd>
namespace QuantLib {
namespace detail {
template <typename T> struct null_checker {
null_checker(T value) : value(value) {}
T value;
};
template <typename T>
std::ostream& operator<<(std::ostream&, const null_checker<T>&);
struct ordinal_holder {
ordinal_holder(Size n) : n(n) {}
Size n;
};
std::ostream& operator<<(std::ostream&, const ordinal_holder&);
template <typename T> struct power_of_two_holder {
power_of_two_holder(T n) : n(n) {}
T n;
};
template <typename T>
std::ostream& operator<<(std::ostream&,
const power_of_two_holder<T>&);
struct percent_holder {
percent_holder(Real value) : value(value) {}
Real value;
};
std::ostream& operator<<(std::ostream&, const percent_holder&);
template <typename InputIterator> struct sequence_holder {
sequence_holder(InputIterator begin, InputIterator end)
: begin(begin), end(end) {}
InputIterator begin, end;
};
template <typename I>
std::ostream& operator<<(std::ostream&, const sequence_holder<I>&);
}
namespace io {
/*! \defgroup manips Output manipulators
Helper functions for creating formatted output.
@{
*/
//! check for nulls before output
template <typename T>
detail::null_checker<T> checknull(T);
//! outputs naturals as 1st, 2nd, 3rd...
detail::ordinal_holder ordinal(Size);
//! output integers as powers of two
template <typename T>
detail::power_of_two_holder<T> power_of_two(T);
//! output reals as percentages
detail::percent_holder percent(Real);
//! output rates and spreads as percentages
detail::percent_holder rate(Rate);
//! output volatilities as percentages
detail::percent_holder volatility(Volatility);
//! output STL-compliant containers as space-separated sequences
template <class Container>
detail::sequence_holder<typename Container::const_iterator>
sequence(const Container& c);
/*! @} */
// inline definitions
template <typename T>
inline detail::null_checker<T> checknull(T x) {
return detail::null_checker<T>(x);
}
inline detail::ordinal_holder ordinal(Size n) {
return detail::ordinal_holder(n);
}
template <typename T>
inline detail::power_of_two_holder<T> power_of_two(T n) {
return detail::power_of_two_holder<T>(n);
}
inline detail::percent_holder percent(Real x) {
return detail::percent_holder(x);
}
inline detail::percent_holder rate(Rate r) {
return detail::percent_holder(r);
}
inline detail::percent_holder volatility(Volatility v) {
return detail::percent_holder(v);
}
template <class Container>
inline detail::sequence_holder<typename Container::const_iterator>
sequence(const Container& c) {
return detail::sequence_holder<typename Container::const_iterator>(
c.begin(), c.end());
}
}
namespace detail {
template <typename T>
inline std::ostream& operator<<(std::ostream& out,
const null_checker<T>& checker) {
if (checker.value == Null<T>())
return out << "null";
else
return out << checker.value;
}
template <typename T>
inline std::ostream& operator<<(std::ostream& out,
const power_of_two_holder<T>& holder) {
if (holder.n == Null<T>())
return out << "null";
T n = holder.n;
Integer power = 0;
if (n != 0) {
while (!(n & 1UL)) {
power++;
n >>= 1;
}
}
return out << n << "*2^" << power;
}
template <typename I>
inline std::ostream& operator<<(std::ostream& out,
const sequence_holder<I>& holder) {
out << "( ";
for (I i = holder.begin; i != holder.end; ++i)
out << *i << " ";
out << ")";
return out;
}
}
}
#endif
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