263 lines
9.4 KiB
C++
Executable File
263 lines
9.4 KiB
C++
Executable File
#ifndef POSIX_TIME_SERIALIZE_HPP___
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#define POSIX_TIME_SERIALIZE_HPP___
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/* Copyright (c) 2004-2005 CrystalClear Software, Inc.
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* Use, modification and distribution is subject to the
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* Boost Software License, Version 1.0. (See accompanying
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* file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
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* Author: Jeff Garland, Bart Garst
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* $Date$
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*/
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#include "boost/date_time/posix_time/posix_time.hpp"
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#include "boost/date_time/gregorian/greg_serialize.hpp"
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#include "boost/core/nvp.hpp"
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#include "boost/numeric/conversion/cast.hpp"
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#include "boost/type_traits/integral_constant.hpp"
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// Define versions for serialization compatibility
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// alows the unit tests to make an older version to check compatibility
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#ifndef BOOST_DATE_TIME_POSIX_TIME_DURATION_VERSION
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#define BOOST_DATE_TIME_POSIX_TIME_DURATION_VERSION 1
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#endif
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namespace boost {
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namespace serialization {
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template<typename T>
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struct version;
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template<>
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struct version<boost::posix_time::time_duration>
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: integral_constant<int, BOOST_DATE_TIME_POSIX_TIME_DURATION_VERSION>
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{
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};
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// A macro to split serialize functions into save & load functions.
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// It is here to avoid dependency on Boost.Serialization just for the
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// BOOST_SERIALIZATION_SPLIT_FREE macro
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#define BOOST_DATE_TIME_SPLIT_FREE(T) \
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template<class Archive> \
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inline void serialize(Archive & ar, \
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T & t, \
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const unsigned int file_version) \
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{ \
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split_free(ar, t, file_version); \
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}
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BOOST_DATE_TIME_SPLIT_FREE(boost::posix_time::ptime)
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BOOST_DATE_TIME_SPLIT_FREE(boost::posix_time::time_duration)
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BOOST_DATE_TIME_SPLIT_FREE(boost::posix_time::time_period)
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#undef BOOST_DATE_TIME_SPLIT_FREE
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/*** time_duration ***/
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//! Function to save posix_time::time_duration objects using serialization lib
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/*! time_duration objects are broken down into 4 parts for serialization:
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* types are hour_type, min_type, sec_type, and fractional_seconds_type
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* as defined in the time_duration class
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*/
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template<class TimeResTraitsSize, class Archive>
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void save_td(Archive& ar, const posix_time::time_duration& td)
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{
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TimeResTraitsSize h = boost::numeric_cast<TimeResTraitsSize>(td.hours());
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TimeResTraitsSize m = boost::numeric_cast<TimeResTraitsSize>(td.minutes());
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TimeResTraitsSize s = boost::numeric_cast<TimeResTraitsSize>(td.seconds());
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posix_time::time_duration::fractional_seconds_type fs = td.fractional_seconds();
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ar & make_nvp("time_duration_hours", h);
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ar & make_nvp("time_duration_minutes", m);
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ar & make_nvp("time_duration_seconds", s);
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ar & make_nvp("time_duration_fractional_seconds", fs);
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}
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template<class Archive>
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void save(Archive & ar,
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const posix_time::time_duration& td,
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unsigned int version)
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{
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// serialize a bool so we know how to read this back in later
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bool is_special = td.is_special();
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ar & make_nvp("is_special", is_special);
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if(is_special) {
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std::string s = to_simple_string(td);
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ar & make_nvp("sv_time_duration", s);
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}
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else {
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// Write support for earlier versions allows for upgrade compatibility testing
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// See load comments for version information
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if (version == 0) {
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save_td<int32_t>(ar, td);
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} else {
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save_td<int64_t>(ar, td);
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}
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}
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}
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//! Function to load posix_time::time_duration objects using serialization lib
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/*! time_duration objects are broken down into 4 parts for serialization:
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* types are hour_type, min_type, sec_type, and fractional_seconds_type
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* as defined in the time_duration class
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*/
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template<class TimeResTraitsSize, class Archive>
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void load_td(Archive& ar, posix_time::time_duration& td)
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{
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TimeResTraitsSize h(0);
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TimeResTraitsSize m(0);
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TimeResTraitsSize s(0);
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posix_time::time_duration::fractional_seconds_type fs(0);
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ar & make_nvp("time_duration_hours", h);
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ar & make_nvp("time_duration_minutes", m);
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ar & make_nvp("time_duration_seconds", s);
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ar & make_nvp("time_duration_fractional_seconds", fs);
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td = posix_time::time_duration(h, m, s, fs);
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}
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template<class Archive>
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void load(Archive & ar,
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posix_time::time_duration & td,
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unsigned int version)
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{
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bool is_special = false;
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ar & make_nvp("is_special", is_special);
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if(is_special) {
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std::string s;
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ar & make_nvp("sv_time_duration", s);
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posix_time::special_values sv = gregorian::special_value_from_string(s);
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td = posix_time::time_duration(sv);
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}
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else {
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// Version "0" (Boost 1.65.1 or earlier, which used int32_t for day/hour/minute/second and
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// therefore suffered from the year 2038 issue.)
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// Version "0.5" (Boost 1.66.0 changed to std::time_t but did not increase the version;
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// it was missed in the original change, all code reviews, and there were no
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// static assertions to protect the code; further std::time_t can be 32-bit
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// or 64-bit so it reduced portability. This makes 1.66.0 hard to handle...)
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// Version "1" (Boost 1.67.0 or later uses int64_t and is properly versioned)
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// If the size of any of these items changes, a new version is needed.
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BOOST_STATIC_ASSERT(sizeof(posix_time::time_duration::hour_type) == sizeof(boost::int64_t));
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BOOST_STATIC_ASSERT(sizeof(posix_time::time_duration::min_type) == sizeof(boost::int64_t));
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BOOST_STATIC_ASSERT(sizeof(posix_time::time_duration::sec_type) == sizeof(boost::int64_t));
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BOOST_STATIC_ASSERT(sizeof(posix_time::time_duration::fractional_seconds_type) == sizeof(boost::int64_t));
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if (version == 0) {
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load_td<int32_t>(ar, td);
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} else {
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load_td<int64_t>(ar, td);
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}
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}
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}
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// no load_construct_data function provided as time_duration provides a
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// default constructor
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/*** ptime ***/
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//! Function to save posix_time::ptime objects using serialization lib
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/*! ptime objects are broken down into 2 parts for serialization:
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* a date object and a time_duration onject
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*/
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template<class Archive>
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void save(Archive & ar,
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const posix_time::ptime& pt,
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unsigned int /*version*/)
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{
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// from_iso_string does not include fractional seconds
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// therefore date and time_duration are used
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posix_time::ptime::date_type d = pt.date();
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ar & make_nvp("ptime_date", d);
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if(!pt.is_special()) {
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posix_time::ptime::time_duration_type td = pt.time_of_day();
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ar & make_nvp("ptime_time_duration", td);
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}
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}
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//! Function to load posix_time::ptime objects using serialization lib
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/*! ptime objects are broken down into 2 parts for serialization:
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* a date object and a time_duration onject
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*/
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template<class Archive>
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void load(Archive & ar,
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posix_time::ptime & pt,
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unsigned int /*version*/)
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{
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// from_iso_string does not include fractional seconds
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// therefore date and time_duration are used
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posix_time::ptime::date_type d(posix_time::not_a_date_time);
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posix_time::ptime::time_duration_type td;
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ar & make_nvp("ptime_date", d);
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if(!d.is_special()) {
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ar & make_nvp("ptime_time_duration", td);
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pt = boost::posix_time::ptime(d,td);
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}
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else {
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pt = boost::posix_time::ptime(d.as_special());
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}
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}
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//!override needed b/c no default constructor
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template<class Archive>
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inline void load_construct_data(Archive & /*ar*/,
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posix_time::ptime* pt,
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const unsigned int /*file_version*/)
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{
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// retrieve data from archive required to construct new
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// invoke inplace constructor to initialize instance of date
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new(pt) boost::posix_time::ptime(boost::posix_time::not_a_date_time);
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}
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/*** time_period ***/
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//! Function to save posix_time::time_period objects using serialization lib
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/*! time_period objects are broken down into 2 parts for serialization:
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* a begining ptime object and an ending ptime object
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*/
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template<class Archive>
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void save(Archive & ar,
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const posix_time::time_period& tp,
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unsigned int /*version*/)
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{
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posix_time::ptime beg(tp.begin().date(), tp.begin().time_of_day());
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posix_time::ptime end(tp.end().date(), tp.end().time_of_day());
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ar & make_nvp("time_period_begin", beg);
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ar & make_nvp("time_period_end", end);
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}
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//! Function to load posix_time::time_period objects using serialization lib
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/*! time_period objects are broken down into 2 parts for serialization:
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* a begining ptime object and an ending ptime object
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*/
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template<class Archive>
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void load(Archive & ar,
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boost::posix_time::time_period & tp,
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unsigned int /*version*/)
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{
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posix_time::time_duration td(1,0,0);
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gregorian::date d(gregorian::not_a_date_time);
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posix_time::ptime beg(d,td);
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posix_time::ptime end(d,td);
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ar & make_nvp("time_period_begin", beg);
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ar & make_nvp("time_period_end", end);
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tp = boost::posix_time::time_period(beg, end);
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}
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//!override needed b/c no default constructor
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template<class Archive>
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inline void load_construct_data(Archive & /*ar*/,
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boost::posix_time::time_period* tp,
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const unsigned int /*file_version*/)
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{
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posix_time::time_duration td(1,0,0);
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gregorian::date d(gregorian::not_a_date_time);
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posix_time::ptime beg(d,td);
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posix_time::ptime end(d,td);
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new(tp) boost::posix_time::time_period(beg,end);
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}
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} // namespace serialization
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} // namespace boost
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#endif
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