1 | #ifndef BOOST_DATE_TIME_LOCAL_TIME_IO_HPP__ |
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2 | #define BOOST_DATE_TIME_LOCAL_TIME_IO_HPP__ |
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3 | |
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4 | /* Copyright (c) 2003-2004 CrystalClear Software, Inc. |
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5 | * Subject to the Boost Software License, Version 1.0. |
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6 | * (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt) |
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7 | * Author: Jeff Garland, Bart Garst |
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8 | * $Date: 2008-11-13 14:05:31 -0500 (Thu, 13 Nov 2008) $ |
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9 | */ |
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10 | |
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11 | #include <locale> |
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12 | #include <iostream> |
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13 | #include <iterator> // i/ostreambuf_iterator |
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14 | #include <boost/io/ios_state.hpp> |
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15 | #include <boost/date_time/time_facet.hpp> |
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16 | #include <boost/date_time/string_convert.hpp> |
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17 | #include <boost/date_time/local_time/local_date_time.hpp> |
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18 | #include <boost/date_time/local_time/posix_time_zone.hpp> |
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19 | #include <boost/date_time/local_time/conversion.hpp> // to_tm will be needed in the facets |
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20 | |
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21 | namespace boost { |
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22 | namespace local_time { |
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23 | |
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24 | typedef boost::date_time::time_facet<local_date_time, wchar_t> wlocal_time_facet; |
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25 | typedef boost::date_time::time_facet<local_date_time, char> local_time_facet; |
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26 | |
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27 | typedef boost::date_time::time_input_facet<local_date_time::utc_time_type,wchar_t> wlocal_time_input_facet; |
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28 | typedef boost::date_time::time_input_facet<local_date_time::utc_time_type,char> local_time_input_facet; |
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29 | |
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30 | //! operator<< for local_date_time - see local_time docs for formatting details |
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31 | template<class CharT, class TraitsT> |
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32 | inline |
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33 | std::basic_ostream<CharT, TraitsT>& |
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34 | operator<<(std::basic_ostream<CharT, TraitsT>& os, const local_date_time& ldt) |
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35 | { |
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36 | boost::io::ios_flags_saver iflags(os); |
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37 | typedef local_date_time time_type;//::utc_time_type typename |
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38 | typedef date_time::time_facet<time_type, CharT> custom_time_facet; |
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39 | typedef std::time_put<CharT> std_time_facet; |
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40 | std::ostreambuf_iterator<CharT> oitr(os); |
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41 | |
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42 | if(std::has_facet<custom_time_facet>(os.getloc())) { |
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43 | std::use_facet<custom_time_facet>(os.getloc()).put(oitr, |
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44 | os, |
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45 | os.fill(), |
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46 | ldt); |
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47 | } |
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48 | else { |
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49 | custom_time_facet* f = new custom_time_facet(); |
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50 | std::locale l = std::locale(os.getloc(), f); |
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51 | os.imbue(l); |
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52 | f->put(oitr, os, os.fill(), ldt); |
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53 | } |
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54 | |
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55 | return os; |
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56 | } |
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57 | |
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58 | |
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59 | //! input operator for local_date_time |
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60 | template <class CharT, class Traits> |
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61 | inline |
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62 | std::basic_istream<CharT, Traits>& |
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63 | operator>>(std::basic_istream<CharT, Traits>& is, local_date_time& ldt) |
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64 | { |
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65 | boost::io::ios_flags_saver iflags(is); |
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66 | typename std::basic_istream<CharT, Traits>::sentry strm_sentry(is, false); |
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67 | if (strm_sentry) { |
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68 | try { |
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69 | typedef typename local_date_time::utc_time_type utc_time_type; |
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70 | typedef typename date_time::time_input_facet<utc_time_type, CharT> time_input_facet; |
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71 | |
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72 | // intermediate objects |
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73 | std::basic_string<CharT> tz_str; |
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74 | utc_time_type pt(not_a_date_time); |
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75 | |
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76 | std::istreambuf_iterator<CharT,Traits> sit(is), str_end; |
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77 | if(std::has_facet<time_input_facet>(is.getloc())) { |
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78 | std::use_facet<time_input_facet>(is.getloc()).get_local_time(sit, str_end, is, pt, tz_str); |
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79 | } |
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80 | else { |
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81 | time_input_facet* f = new time_input_facet(); |
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82 | std::locale l = std::locale(is.getloc(), f); |
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83 | is.imbue(l); |
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84 | f->get_local_time(sit, str_end, is, pt, tz_str); |
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85 | } |
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86 | if(tz_str.empty()) { |
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87 | time_zone_ptr null_ptr; |
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88 | // a null time_zone_ptr creates a local_date_time that is UTC |
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89 | ldt = local_date_time(pt, null_ptr); |
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90 | } |
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91 | else { |
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92 | time_zone_ptr tz_ptr(new posix_time_zone(date_time::convert_string_type<CharT,char>(tz_str))); |
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93 | // the "date & time" constructor expects the time label to *not* be utc. |
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94 | // a posix_tz_string also expects the time label to *not* be utc. |
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95 | ldt = local_date_time(pt.date(), pt.time_of_day(), tz_ptr, local_date_time::EXCEPTION_ON_ERROR); |
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96 | } |
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97 | } |
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98 | catch(...) { |
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99 | // mask tells us what exceptions are turned on |
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100 | std::ios_base::iostate exception_mask = is.exceptions(); |
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101 | // if the user wants exceptions on failbit, we'll rethrow our |
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102 | // date_time exception & set the failbit |
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103 | if(std::ios_base::failbit & exception_mask) { |
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104 | try { is.setstate(std::ios_base::failbit); } |
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105 | catch(std::ios_base::failure&) {} // ignore this one |
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106 | throw; // rethrow original exception |
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107 | } |
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108 | else { |
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109 | // if the user want's to fail quietly, we simply set the failbit |
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110 | is.setstate(std::ios_base::failbit); |
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111 | } |
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112 | |
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113 | } |
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114 | } |
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115 | return is; |
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116 | } |
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117 | |
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118 | //! output operator for local_time_period |
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119 | template <class CharT, class TraitsT> |
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120 | inline |
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121 | std::basic_ostream<CharT, TraitsT>& |
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122 | operator<<(std::basic_ostream<CharT, TraitsT>& os, |
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123 | const boost::local_time::local_time_period& p) { |
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124 | boost::io::ios_flags_saver iflags(os); |
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125 | typedef boost::date_time::time_facet<local_date_time, CharT> custom_facet; |
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126 | typedef std::time_put<CharT> std_time_facet; |
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127 | std::ostreambuf_iterator<CharT> oitr(os); |
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128 | if (std::has_facet<custom_facet>(os.getloc())) { |
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129 | std::use_facet<custom_facet>(os.getloc()).put(oitr, os, os.fill(), p); |
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130 | } |
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131 | else { |
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132 | //instantiate a custom facet for dealing with periods since the user |
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133 | //has not put one in the stream so far. This is for efficiency |
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134 | //since we would always need to reconstruct for every time period |
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135 | //if the local did not already exist. Of course this will be overridden |
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136 | //if the user imbues as some later point. |
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137 | custom_facet* f = new custom_facet(); |
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138 | std::locale l = std::locale(os.getloc(), f); |
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139 | os.imbue(l); |
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140 | f->put(oitr, os, os.fill(), p); |
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141 | } |
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142 | return os; |
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143 | } |
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144 | |
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145 | //! input operator for local_time_period |
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146 | template <class CharT, class Traits> |
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147 | inline |
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148 | std::basic_istream<CharT, Traits>& |
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149 | operator>>(std::basic_istream<CharT, Traits>& is, boost::local_time::local_time_period& tp) |
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150 | { |
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151 | boost::io::ios_flags_saver iflags(is); |
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152 | typename std::basic_istream<CharT, Traits>::sentry strm_sentry(is, false); |
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153 | if (strm_sentry) { |
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154 | try { |
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155 | typedef typename date_time::time_input_facet<local_date_time, CharT> time_input_facet; |
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156 | |
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157 | std::istreambuf_iterator<CharT,Traits> sit(is), str_end; |
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158 | if(std::has_facet<time_input_facet>(is.getloc())) { |
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159 | std::use_facet<time_input_facet>(is.getloc()).get(sit, str_end, is, tp); |
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160 | } |
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161 | else { |
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162 | time_input_facet* f = new time_input_facet(); |
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163 | std::locale l = std::locale(is.getloc(), f); |
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164 | is.imbue(l); |
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165 | f->get(sit, str_end, is, tp); |
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166 | } |
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167 | } |
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168 | catch(...) { |
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169 | std::ios_base::iostate exception_mask = is.exceptions(); |
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170 | if(std::ios_base::failbit & exception_mask) { |
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171 | try { is.setstate(std::ios_base::failbit); } |
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172 | catch(std::ios_base::failure&) {} |
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173 | throw; // rethrow original exception |
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174 | } |
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175 | else { |
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176 | is.setstate(std::ios_base::failbit); |
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177 | } |
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178 | |
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179 | } |
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180 | } |
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181 | return is; |
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182 | } |
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183 | |
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184 | } } // namespaces |
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185 | |
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186 | #endif // BOOST_DATE_TIME_LOCAL_TIME_IO_HPP__ |
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