#ifndef BOOST_DATE_TIME_LOCAL_TIME_IO_HPP__ | |
#define BOOST_DATE_TIME_LOCAL_TIME_IO_HPP__ | |
/* Copyright (c) 2003-2004 CrystalClear Software, Inc. | |
* Subject to the Boost Software License, Version 1.0. | |
* (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt) | |
* Author: Jeff Garland, Bart Garst | |
* $Date: 2008-11-13 14:05:31 -0500 (Thu, 13 Nov 2008) $ | |
*/ | |
#include <locale> | |
#include <iostream> | |
#include <iterator> // i/ostreambuf_iterator | |
#include <boost/io/ios_state.hpp> | |
#include <boost/date_time/time_facet.hpp> | |
#include <boost/date_time/string_convert.hpp> | |
#include <boost/date_time/local_time/local_date_time.hpp> | |
#include <boost/date_time/local_time/posix_time_zone.hpp> | |
#include <boost/date_time/local_time/conversion.hpp> // to_tm will be needed in the facets | |
namespace boost { | |
namespace local_time { | |
typedef boost::date_time::time_facet<local_date_time, wchar_t> wlocal_time_facet; | |
typedef boost::date_time::time_facet<local_date_time, char> local_time_facet; | |
typedef boost::date_time::time_input_facet<local_date_time::utc_time_type,wchar_t> wlocal_time_input_facet; | |
typedef boost::date_time::time_input_facet<local_date_time::utc_time_type,char> local_time_input_facet; | |
//! operator<< for local_date_time - see local_time docs for formatting details | |
template<class CharT, class TraitsT> | |
inline | |
std::basic_ostream<CharT, TraitsT>& | |
operator<<(std::basic_ostream<CharT, TraitsT>& os, const local_date_time& ldt) | |
{ | |
boost::io::ios_flags_saver iflags(os); | |
typedef local_date_time time_type;//::utc_time_type typename | |
typedef date_time::time_facet<time_type, CharT> custom_time_facet; | |
typedef std::time_put<CharT> std_time_facet; | |
std::ostreambuf_iterator<CharT> oitr(os); | |
if(std::has_facet<custom_time_facet>(os.getloc())) { | |
std::use_facet<custom_time_facet>(os.getloc()).put(oitr, | |
os, | |
os.fill(), | |
ldt); | |
} | |
else { | |
custom_time_facet* f = new custom_time_facet(); | |
std::locale l = std::locale(os.getloc(), f); | |
os.imbue(l); | |
f->put(oitr, os, os.fill(), ldt); | |
} | |
return os; | |
} | |
//! input operator for local_date_time | |
template <class CharT, class Traits> | |
inline | |
std::basic_istream<CharT, Traits>& | |
operator>>(std::basic_istream<CharT, Traits>& is, local_date_time& ldt) | |
{ | |
boost::io::ios_flags_saver iflags(is); | |
typename std::basic_istream<CharT, Traits>::sentry strm_sentry(is, false); | |
if (strm_sentry) { | |
try { | |
typedef typename local_date_time::utc_time_type utc_time_type; | |
typedef typename date_time::time_input_facet<utc_time_type, CharT> time_input_facet; | |
// intermediate objects | |
std::basic_string<CharT> tz_str; | |
utc_time_type pt(not_a_date_time); | |
std::istreambuf_iterator<CharT,Traits> sit(is), str_end; | |
if(std::has_facet<time_input_facet>(is.getloc())) { | |
std::use_facet<time_input_facet>(is.getloc()).get_local_time(sit, str_end, is, pt, tz_str); | |
} | |
else { | |
time_input_facet* f = new time_input_facet(); | |
std::locale l = std::locale(is.getloc(), f); | |
is.imbue(l); | |
f->get_local_time(sit, str_end, is, pt, tz_str); | |
} | |
if(tz_str.empty()) { | |
time_zone_ptr null_ptr; | |
// a null time_zone_ptr creates a local_date_time that is UTC | |
ldt = local_date_time(pt, null_ptr); | |
} | |
else { | |
time_zone_ptr tz_ptr(new posix_time_zone(date_time::convert_string_type<CharT,char>(tz_str))); | |
// the "date & time" constructor expects the time label to *not* be utc. | |
// a posix_tz_string also expects the time label to *not* be utc. | |
ldt = local_date_time(pt.date(), pt.time_of_day(), tz_ptr, local_date_time::EXCEPTION_ON_ERROR); | |
} | |
} | |
catch(...) { | |
// mask tells us what exceptions are turned on | |
std::ios_base::iostate exception_mask = is.exceptions(); | |
// if the user wants exceptions on failbit, we'll rethrow our | |
// date_time exception & set the failbit | |
if(std::ios_base::failbit & exception_mask) { | |
try { is.setstate(std::ios_base::failbit); } | |
catch(std::ios_base::failure&) {} // ignore this one | |
throw; // rethrow original exception | |
} | |
else { | |
// if the user want's to fail quietly, we simply set the failbit | |
is.setstate(std::ios_base::failbit); | |
} | |
} | |
} | |
return is; | |
} | |
//! output operator for local_time_period | |
template <class CharT, class TraitsT> | |
inline | |
std::basic_ostream<CharT, TraitsT>& | |
operator<<(std::basic_ostream<CharT, TraitsT>& os, | |
const boost::local_time::local_time_period& p) { | |
boost::io::ios_flags_saver iflags(os); | |
typedef boost::date_time::time_facet<local_date_time, CharT> custom_facet; | |
typedef std::time_put<CharT> std_time_facet; | |
std::ostreambuf_iterator<CharT> oitr(os); | |
if (std::has_facet<custom_facet>(os.getloc())) { | |
std::use_facet<custom_facet>(os.getloc()).put(oitr, os, os.fill(), p); | |
} | |
else { | |
//instantiate a custom facet for dealing with periods since the user | |
//has not put one in the stream so far. This is for efficiency | |
//since we would always need to reconstruct for every time period | |
//if the local did not already exist. Of course this will be overridden | |
//if the user imbues as some later point. | |
custom_facet* f = new custom_facet(); | |
std::locale l = std::locale(os.getloc(), f); | |
os.imbue(l); | |
f->put(oitr, os, os.fill(), p); | |
} | |
return os; | |
} | |
//! input operator for local_time_period | |
template <class CharT, class Traits> | |
inline | |
std::basic_istream<CharT, Traits>& | |
operator>>(std::basic_istream<CharT, Traits>& is, boost::local_time::local_time_period& tp) | |
{ | |
boost::io::ios_flags_saver iflags(is); | |
typename std::basic_istream<CharT, Traits>::sentry strm_sentry(is, false); | |
if (strm_sentry) { | |
try { | |
typedef typename date_time::time_input_facet<local_date_time, CharT> time_input_facet; | |
std::istreambuf_iterator<CharT,Traits> sit(is), str_end; | |
if(std::has_facet<time_input_facet>(is.getloc())) { | |
std::use_facet<time_input_facet>(is.getloc()).get(sit, str_end, is, tp); | |
} | |
else { | |
time_input_facet* f = new time_input_facet(); | |
std::locale l = std::locale(is.getloc(), f); | |
is.imbue(l); | |
f->get(sit, str_end, is, tp); | |
} | |
} | |
catch(...) { | |
std::ios_base::iostate exception_mask = is.exceptions(); | |
if(std::ios_base::failbit & exception_mask) { | |
try { is.setstate(std::ios_base::failbit); } | |
catch(std::ios_base::failure&) {} | |
throw; // rethrow original exception | |
} | |
else { | |
is.setstate(std::ios_base::failbit); | |
} | |
} | |
} | |
return is; | |
} | |
} } // namespaces | |
#endif // BOOST_DATE_TIME_LOCAL_TIME_IO_HPP__ |