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Diffstat (limited to 'src/boost/libs/date_time/example/tutorial/io_tutorial.cpp')
| -rw-r--r-- | src/boost/libs/date_time/example/tutorial/io_tutorial.cpp | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/src/boost/libs/date_time/example/tutorial/io_tutorial.cpp b/src/boost/libs/date_time/example/tutorial/io_tutorial.cpp new file mode 100644 index 000000000..165a53f93 --- /dev/null +++ b/src/boost/libs/date_time/example/tutorial/io_tutorial.cpp @@ -0,0 +1,194 @@ +#include <iostream> +#include <boost/date_time/local_time/local_time.hpp> + +int main(){ + using namespace boost::gregorian; + using namespace boost::posix_time; + using namespace boost::local_time; + using namespace std; + + /****** basic use ******/ + date d(2004, Feb, 29); + time_duration td(12,34,56,789); + stringstream ss; + ss << d << ' ' << td; + ptime pt(not_a_date_time); + cout << pt << endl; // "not-a-date-time" + ss >> pt; + cout << pt << endl; // "2004-Feb-29 12:34:56.000789" + ss.str(""); + ss << pt << " EDT-05EDT,M4.1.0,M10.5.0"; + local_date_time ldt(not_a_date_time); + ss >> ldt; + cout << ldt << endl; // " 2004-Feb-29 12:34:56.000789 EDT" + + + /****** format strings ******/ + local_time_facet* output_facet = new local_time_facet(); + local_time_input_facet* input_facet = new local_time_input_facet(); + ss.imbue(locale(locale::classic(), output_facet)); + ss.imbue(locale(ss.getloc(), input_facet)); + output_facet->format("%a %b %d, %H:%M %z"); + ss.str(""); + ss << ldt; + cout << ss.str() << endl; // "Sun Feb 29, 12:34 EDT" + + output_facet->format(local_time_facet::iso_time_format_specifier); + ss.str(""); + ss << ldt; + cout << ss.str() << endl; // "20040229T123456.000789-0500" + output_facet->format(local_time_facet::iso_time_format_extended_specifier); + ss.str(""); + ss << ldt; + cout << ss.str() << endl; // "2004-02-29 12:34:56.000789-05:00" + + // extra words in format + string my_format("The extended ordinal time %Y-%jT%H:%M can also be represented as %A %B %d, %Y"); + output_facet->format(my_format.c_str()); + input_facet->format(my_format.c_str()); + ss.str(""); + ss << ldt; + cout << ss.str() << endl; + + // matching extra words in input + ss.str("The extended ordinal time 2005-128T12:15 can also be represented as Sunday May 08, 2005"); + ss >> ldt; + cout << ldt << endl; // cout is using default format "2005-May-08 12:15:00 UTC" + + /****** content strings ******/ + // set up the collections of custom strings. + // only the full names are altered for the sake of brevity + string month_names[12] = { "january", "february", "march", + "april", "may", "june", + "july", "august", "september", + "october", "november", "december" }; + vector<string> long_months(&month_names[0], &month_names[12]); + string day_names[7] = { "sunday", "monday", "tuesday", "wednesday", + "thursday", "friday", "saturday" }; + vector<string> long_days(&day_names[0], &day_names[7]); + + // create date_facet and date_input_facet using all defaults + date_facet* date_output = new date_facet(); + date_input_facet* date_input = new date_input_facet(); + ss.imbue(locale(ss.getloc(), date_output)); + ss.imbue(locale(ss.getloc(), date_input)); + + // replace names in the output facet + date_output->long_month_names(long_months); + date_output->long_weekday_names(long_days); + + // replace names in the input facet + date_input->long_month_names(long_months); + date_input->long_weekday_names(long_days); + + // customize month, weekday and date formats + date_output->format("%Y-%B-%d"); + date_input->format("%Y-%B-%d"); + date_output->month_format("%B"); // full name + date_input->month_format("%B"); // full name + date_output->weekday_format("%A"); // full name + date_input->weekday_format("%A"); // full name + + ss.str(""); + ss << greg_month(3); + cout << ss.str() << endl; // "march" + ss.str(""); + ss << greg_weekday(3); + cout << ss.str() << endl; // "tuesday" + ss.str(""); + ss << date(2005,Jul,4); + cout << ss.str() << endl; // "2005-july-04" + + + /****** special values ******/ + // reset the formats to defaults + output_facet->format(local_time_facet::default_time_format); + input_facet->format(local_time_input_facet::default_time_input_format); + + // create custom special_values parser and formatter objects + // and add them to the facets + string sv[5] = {"nadt","neg_inf", "pos_inf", "min_dt", "max_dt" }; + vector<string> sv_names(&sv[0], &sv[5]); + special_values_parser sv_parser(sv_names.begin(), sv_names.end()); + special_values_formatter sv_formatter(sv_names.begin(), sv_names.end()); + output_facet->special_values_formatter(sv_formatter); + input_facet->special_values_parser(sv_parser); + + ss.str(""); + ldt = local_date_time(not_a_date_time); + ss << ldt; + cout << ss.str() << endl; // "nadt" + + ss.str("min_dt"); + ss >> ldt; + ss.str(""); + ss << ldt; + cout << ss.str() << endl; // "1400-Jan-01 00:00:00 UTC" + + /****** date/time periods ******/ + // reset all formats to defaults + date_output->format(date_facet::default_date_format); + date_input->format(date_facet::default_date_format); + date_output->month_format("%b"); // abbrev + date_input->month_format("%b"); // abbrev + date_output->weekday_format("%a"); // abbrev + date_input->weekday_format("%a"); // abbrev + + // create our date_period + date_period dp(date(2005,Mar,1), days(31)); // month of march + + // custom period formatter and parser + period_formatter per_formatter(period_formatter::AS_OPEN_RANGE, + " to ", "from ", " exclusive", " inclusive" ); + period_parser per_parser(period_parser::AS_OPEN_RANGE, + " to ", "from ", " exclusive" , " inclusive" ); + + // default output + ss.str(""); + ss << dp; + cout << ss.str() << endl; // "[2005-Mar-01/2005-Mar-31]" + + // add out custom parser and formatter to the facets + date_output->period_formatter(per_formatter); + date_input->period_parser(per_parser); + + // custom output + ss.str(""); + ss << dp; + cout << ss.str() << endl; // "from 2005-Feb-01 to 2005-Apr-01 exclusive" + + + /****** date generators ******/ + // custom date_generator phrases + string dg_phrases[9] = { "1st", "2nd", "3rd", "4th", "5th", + "final", "prior to", "following", "in" }; + vector<string> phrases(&dg_phrases[0], &dg_phrases[9]); + + // create our date_generator + first_day_of_the_week_before d_gen(Monday); + + // default output + ss.str(""); + ss << d_gen; + cout << ss.str() << endl; // "Mon before" + + // add our custom strings to the date facets + date_output->date_gen_phrase_strings(phrases); + date_input->date_gen_element_strings(phrases); + + // custom output + ss.str(""); + ss << d_gen; + cout << ss.str() << endl; // "Mon prior to" + + return 0; +} + + +/* Copyright 2005: CrystalClear Software, Inc + * http://www.crystalclearsoftware.com + * + * 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) + */ + |