1 #ifndef BOOST_DATE_TIME_LOCAL_TIME_IO_HPP__ 2 #define BOOST_DATE_TIME_LOCAL_TIME_IO_HPP__ 3 4 /* Copyright (c) 2003-2004 CrystalClear Software, Inc. 5 * Subject to the Boost Software License, Version 1.0. 6 * (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt) 7 * Author: Jeff Garland, Bart Garst 8 * $Date$ 9 */ 10 11 #include <locale> 12 #include <iostream> 13 #include <iterator> // i/ostreambuf_iterator 14 #include <boost/io/ios_state.hpp> 15 #include <boost/date_time/time_facet.hpp> 16 #include <boost/date_time/string_convert.hpp> 17 #include <boost/date_time/local_time/local_date_time.hpp> 18 #include <boost/date_time/local_time/posix_time_zone.hpp> 19 #include <boost/date_time/local_time/conversion.hpp> // to_tm will be needed in the facets 20 21 namespace boost { 22 namespace local_time { 23 24 typedef boost::date_time::time_facet<local_date_time, wchar_t> wlocal_time_facet; 25 typedef boost::date_time::time_facet<local_date_time, char> local_time_facet; 26 27 typedef boost::date_time::time_input_facet<local_date_time::utc_time_type,wchar_t> wlocal_time_input_facet; 28 typedef boost::date_time::time_input_facet<local_date_time::utc_time_type,char> local_time_input_facet; 29 30 //! operator<< for local_date_time - see local_time docs for formatting details 31 template<class CharT, class TraitsT> 32 inline 33 std::basic_ostream<CharT, TraitsT>& operator <<(std::basic_ostream<CharT,TraitsT> & os,const local_date_time & ldt)34 operator<<(std::basic_ostream<CharT, TraitsT>& os, const local_date_time& ldt) 35 { 36 boost::io::ios_flags_saver iflags(os); 37 typedef local_date_time time_type;//::utc_time_type typename 38 typedef date_time::time_facet<time_type, CharT> custom_time_facet; 39 std::ostreambuf_iterator<CharT> oitr(os); 40 41 if(std::has_facet<custom_time_facet>(os.getloc())) { 42 std::use_facet<custom_time_facet>(os.getloc()).put(oitr, 43 os, 44 os.fill(), 45 ldt); 46 } 47 else { 48 custom_time_facet* f = new custom_time_facet(); 49 std::locale l = std::locale(os.getloc(), f); 50 os.imbue(l); 51 f->put(oitr, os, os.fill(), ldt); 52 } 53 54 return os; 55 } 56 57 58 //! input operator for local_date_time 59 template <class CharT, class Traits> 60 inline 61 std::basic_istream<CharT, Traits>& operator >>(std::basic_istream<CharT,Traits> & is,local_date_time & ldt)62 operator>>(std::basic_istream<CharT, Traits>& is, local_date_time& ldt) 63 { 64 boost::io::ios_flags_saver iflags(is); 65 typename std::basic_istream<CharT, Traits>::sentry strm_sentry(is, false); 66 if (strm_sentry) { 67 try { 68 typedef typename local_date_time::utc_time_type utc_time_type; 69 typedef typename date_time::time_input_facet<utc_time_type, CharT> time_input_facet; 70 71 // intermediate objects 72 std::basic_string<CharT> tz_str; 73 utc_time_type pt(not_a_date_time); 74 75 std::istreambuf_iterator<CharT,Traits> sit(is), str_end; 76 if(std::has_facet<time_input_facet>(is.getloc())) { 77 std::use_facet<time_input_facet>(is.getloc()).get_local_time(sit, str_end, is, pt, tz_str); 78 } 79 else { 80 time_input_facet* f = new time_input_facet(); 81 std::locale l = std::locale(is.getloc(), f); 82 is.imbue(l); 83 f->get_local_time(sit, str_end, is, pt, tz_str); 84 } 85 if(tz_str.empty()) { 86 time_zone_ptr null_ptr; 87 // a null time_zone_ptr creates a local_date_time that is UTC 88 ldt = local_date_time(pt, null_ptr); 89 } 90 else { 91 time_zone_ptr tz_ptr(new posix_time_zone(date_time::convert_string_type<CharT,char>(tz_str))); 92 // the "date & time" constructor expects the time label to *not* be utc. 93 // a posix_tz_string also expects the time label to *not* be utc. 94 ldt = local_date_time(pt.date(), pt.time_of_day(), tz_ptr, local_date_time::EXCEPTION_ON_ERROR); 95 } 96 } 97 catch(...) { 98 // mask tells us what exceptions are turned on 99 std::ios_base::iostate exception_mask = is.exceptions(); 100 // if the user wants exceptions on failbit, we'll rethrow our 101 // date_time exception & set the failbit 102 if(std::ios_base::failbit & exception_mask) { 103 try { is.setstate(std::ios_base::failbit); } 104 catch(std::ios_base::failure&) {} // ignore this one 105 throw; // rethrow original exception 106 } 107 else { 108 // if the user want's to fail quietly, we simply set the failbit 109 is.setstate(std::ios_base::failbit); 110 } 111 112 } 113 } 114 return is; 115 } 116 117 //! output operator for local_time_period 118 template <class CharT, class TraitsT> 119 inline 120 std::basic_ostream<CharT, TraitsT>& operator <<(std::basic_ostream<CharT,TraitsT> & os,const boost::local_time::local_time_period & p)121 operator<<(std::basic_ostream<CharT, TraitsT>& os, 122 const boost::local_time::local_time_period& p) { 123 boost::io::ios_flags_saver iflags(os); 124 typedef boost::date_time::time_facet<local_date_time, CharT> custom_facet; 125 std::ostreambuf_iterator<CharT> oitr(os); 126 if (std::has_facet<custom_facet>(os.getloc())) { 127 std::use_facet<custom_facet>(os.getloc()).put(oitr, os, os.fill(), p); 128 } 129 else { 130 //instantiate a custom facet for dealing with periods since the user 131 //has not put one in the stream so far. This is for efficiency 132 //since we would always need to reconstruct for every time period 133 //if the local did not already exist. Of course this will be overridden 134 //if the user imbues as some later point. 135 custom_facet* f = new custom_facet(); 136 std::locale l = std::locale(os.getloc(), f); 137 os.imbue(l); 138 f->put(oitr, os, os.fill(), p); 139 } 140 return os; 141 } 142 143 //! input operator for local_time_period 144 template <class CharT, class Traits> 145 inline 146 std::basic_istream<CharT, Traits>& operator >>(std::basic_istream<CharT,Traits> & is,boost::local_time::local_time_period & tp)147 operator>>(std::basic_istream<CharT, Traits>& is, boost::local_time::local_time_period& tp) 148 { 149 boost::io::ios_flags_saver iflags(is); 150 typename std::basic_istream<CharT, Traits>::sentry strm_sentry(is, false); 151 if (strm_sentry) { 152 try { 153 typedef typename date_time::time_input_facet<local_date_time, CharT> time_input_facet; 154 155 std::istreambuf_iterator<CharT,Traits> sit(is), str_end; 156 if(std::has_facet<time_input_facet>(is.getloc())) { 157 std::use_facet<time_input_facet>(is.getloc()).get(sit, str_end, is, tp); 158 } 159 else { 160 time_input_facet* f = new time_input_facet(); 161 std::locale l = std::locale(is.getloc(), f); 162 is.imbue(l); 163 f->get(sit, str_end, is, tp); 164 } 165 } 166 catch(...) { 167 std::ios_base::iostate exception_mask = is.exceptions(); 168 if(std::ios_base::failbit & exception_mask) { 169 try { is.setstate(std::ios_base::failbit); } 170 catch(std::ios_base::failure&) {} 171 throw; // rethrow original exception 172 } 173 else { 174 is.setstate(std::ios_base::failbit); 175 } 176 177 } 178 } 179 return is; 180 } 181 182 } } // namespaces 183 184 #endif // BOOST_DATE_TIME_LOCAL_TIME_IO_HPP__ 185