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