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// (C) Copyright Howard Hinnant
// (C) Copyright 2011 Vicente J. Botet Escriba
// Use, modification and distribution are subject to the Boost Software License,
// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt).
//
// This code was adapted by Vicente from Howard Hinnant's experimental work
// on chrono i/o to Boost
#ifndef BOOST_CHRONO_IO_DURATION_IO_HPP
#define BOOST_CHRONO_IO_DURATION_IO_HPP
#include <boost/chrono/duration.hpp>
#include <boost/ratio/ratio_io.hpp>
#include <boost/chrono/io/duration_style.hpp>
#include <boost/chrono/io/ios_base_state.hpp>
#include <boost/chrono/io/duration_put.hpp>
#include <boost/chrono/io/duration_get.hpp>
#include <boost/chrono/io/utility/manip_base.hpp>
#include <boost/detail/no_exceptions_support.hpp>
#include <locale>
#include <iostream>
namespace boost
{
namespace chrono
{
/**
* duration parameterized manipulator.
*/
class duration_fmt: public manip<duration_fmt>
{
duration_style style_;
public:
/**
* explicit manipulator constructor from a @c duration_style
*/
explicit duration_fmt(duration_style style)BOOST_NOEXCEPT
: style_(style)
{}
/**
* Change the duration_style ios state;
*/
void operator()(std::ios_base &ios) const
{
set_duration_style(ios, style_);
}
};
/**
* duration_style i/o saver.
*
* See Boost.IO i/o state savers for a motivating compression.
*/
struct duration_style_io_saver
{
//! the type of the state to restore
typedef std::ios_base state_type;
//! the type of aspect to save
typedef duration_style aspect_type;
/**
* Explicit construction from an i/o stream.
*
* Store a reference to the i/o stream and the value of the associated @c duration_style.
*/
explicit duration_style_io_saver(state_type &s) :
s_save_(s)
{
a_save_ = get_duration_style(s_save_);
}
/**
* Construction from an i/o stream and a @c duration_style to restore.
*
* Stores a reference to the i/o stream and the value @c duration_style to restore given as parameter.
*/
duration_style_io_saver(state_type &s, aspect_type new_value) :
s_save_(s), a_save_(new_value)
{
}
/**
* Destructor.
*
* Restores the i/o stream with the duration_style to be restored.
*/
~duration_style_io_saver()
{
this->restore();
}
/**
* Restores the i/o stream with the duration_style to be restored.
*/
void restore()
{
set_duration_style(s_save_, a_save_);
}
private:
duration_style_io_saver& operator=(duration_style_io_saver const& rhs) ;
state_type& s_save_;
aspect_type a_save_;
};
/**
* duration stream inserter
* @param os the output stream
* @param d to value to insert
* @return @c os
*/
template <class CharT, class Traits, class Rep, class Period>
std::basic_ostream<CharT, Traits>&
operator<<(std::basic_ostream<CharT, Traits>& os, const duration<Rep, Period>& d)
{
bool failed = false;
BOOST_TRY
{
std::ios_base::iostate err = std::ios_base::goodbit;
BOOST_TRY
{
typename std::basic_ostream<CharT, Traits>::sentry opfx(os);
if (bool(opfx))
{
if (!std::has_facet<duration_put<CharT> >(os.getloc()))
{
if (duration_put<CharT> ().put(os, os, os.fill(), d) .failed())
{
err = std::ios_base::badbit;
}
}
else if (std::use_facet<duration_put<CharT> >(os.getloc()) .put(os, os, os.fill(), d) .failed())
{
err = std::ios_base::badbit;
}
os.width(0);
}
}
BOOST_CATCH(...)
{
bool flag = false;
BOOST_TRY
{
os.setstate(std::ios_base::failbit);
}
BOOST_CATCH (std::ios_base::failure )
{
flag = true;
}
BOOST_CATCH_END
if (flag) throw;
}
BOOST_CATCH_END
if (err) os.setstate(err);
return os;
}
BOOST_CATCH(...)
{
failed = true;
}
BOOST_CATCH_END
if (failed) os.setstate(std::ios_base::failbit | std::ios_base::badbit);
return os;
}
/**
*
* @param is the input stream
* @param d the duration
* @return @c is
*/
template <class CharT, class Traits, class Rep, class Period>
std::basic_istream<CharT, Traits>&
operator>>(std::basic_istream<CharT, Traits>& is, duration<Rep, Period>& d)
{
std::ios_base::iostate err = std::ios_base::goodbit;
BOOST_TRY
{
typename std::basic_istream<CharT, Traits>::sentry ipfx(is);
if (bool(ipfx))
{
if (!std::has_facet<duration_get<CharT> >(is.getloc()))
{
duration_get<CharT> ().get(is, std::istreambuf_iterator<CharT, Traits>(), is, err, d);
}
else
{
std::use_facet<duration_get<CharT> >(is.getloc()) .get(is, std::istreambuf_iterator<CharT, Traits>(), is,
err, d);
}
}
}
BOOST_CATCH (...)
{
bool flag = false;
BOOST_TRY
{
is.setstate(std::ios_base::failbit);
}
BOOST_CATCH (std::ios_base::failure )
{
flag = true;
}
BOOST_CATCH_END
if (flag) { BOOST_RETHROW }
}
BOOST_CATCH_END
if (err) is.setstate(err);
return is;
}
} // chrono
}
#endif // header
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