/usr/include/boost/date_time
Edit: /usr/include/boost/date_time/time_system_split.hpp (8077B)
#ifndef DATE_TIME_TIME_SYSTEM_SPLIT_HPP
#define DATE_TIME_TIME_SYSTEM_SPLIT_HPP
/* Copyright (c) 2002,2003,2005 CrystalClear Software, Inc.
* Use, modification and distribution is 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
* $Date$
*/
#include
#include
#include
#include
#include
#include
namespace boost {
namespace date_time {
//! An unadjusted time system implementation.
#if (defined(BOOST_DATE_TIME_NO_MEMBER_INIT))
template
#else
template
#endif
class split_timedate_system
{
public:
typedef typename config::time_rep_type time_rep_type;
typedef typename config::date_type date_type;
typedef typename config::time_duration_type time_duration_type;
typedef typename config::date_duration_type date_duration_type;
typedef typename config::int_type int_type;
typedef typename config::resolution_traits resolution_traits;
//86400 is number of seconds in a day...
#if (defined(BOOST_DATE_TIME_NO_MEMBER_INIT))
typedef date_time::wrapping_int wrap_int_type;
#else
private:
BOOST_STATIC_CONSTANT(int_type, ticks_per_day = INT64_C(86400) * config::tick_per_second);
public:
# if BOOST_WORKAROUND( BOOST_BORLANDC, BOOST_TESTED_AT(0X581) )
typedef date_time::wrapping_int< split_timedate_system::int_type, split_timedate_system::ticks_per_day> wrap_int_type;
# else
typedef date_time::wrapping_int wrap_int_type;
#endif
#endif
static
BOOST_CXX14_CONSTEXPR
time_rep_type get_time_rep(special_values sv)
{
switch (sv) {
case not_a_date_time:
return time_rep_type(date_type(not_a_date_time),
time_duration_type(not_a_date_time));
case pos_infin:
return time_rep_type(date_type(pos_infin),
time_duration_type(pos_infin));
case neg_infin:
return time_rep_type(date_type(neg_infin),
time_duration_type(neg_infin));
case max_date_time: {
time_duration_type td = time_duration_type(24,0,0,0) - time_duration_type(0,0,0,1);
return time_rep_type(date_type(max_date_time), td);
}
case min_date_time:
return time_rep_type(date_type(min_date_time), time_duration_type(0,0,0,0));
default:
return time_rep_type(date_type(not_a_date_time),
time_duration_type(not_a_date_time));
}
}
static
BOOST_CXX14_CONSTEXPR
time_rep_type get_time_rep(const date_type& day,
const time_duration_type& tod,
date_time::dst_flags /* dst */ = not_dst)
{
if(day.is_special() || tod.is_special()) {
if(day.is_not_a_date() || tod.is_not_a_date_time()) {
return time_rep_type(date_type(not_a_date_time),
time_duration_type(not_a_date_time));
}
else if(day.is_pos_infinity()) {
if(tod.is_neg_infinity()) {
return time_rep_type(date_type(not_a_date_time),
time_duration_type(not_a_date_time));
}
else {
return time_rep_type(day, time_duration_type(pos_infin));
}
}
else if(day.is_neg_infinity()) {
if(tod.is_pos_infinity()) {
return time_rep_type(date_type(not_a_date_time),
time_duration_type(not_a_date_time));
}
else {
return time_rep_type(day, time_duration_type(neg_infin));
}
}
else if(tod.is_pos_infinity()) {
if(day.is_neg_infinity()) {
return time_rep_type(date_type(not_a_date_time),
time_duration_type(not_a_date_time));
}
else {
return time_rep_type(date_type(pos_infin), tod);
}
}
else if(tod.is_neg_infinity()) {
if(day.is_pos_infinity()) {
return time_rep_type(date_type(not_a_date_time),
time_duration_type(not_a_date_time));
}
else {
return time_rep_type(date_type(neg_infin), tod);
}
}
}
return time_rep_type(day, tod);
}
static BOOST_CONSTEXPR date_type get_date(const time_rep_type& val)
{
return date_type(val.day);
}
static BOOST_CONSTEXPR time_duration_type get_time_of_day(const time_rep_type& val)
{
return time_duration_type(val.time_of_day);
}
static std::string zone_name(const time_rep_type&)
{
return std::string();
}
static BOOST_CONSTEXPR
bool is_equal(const time_rep_type& lhs, const time_rep_type& rhs)
{
return ((lhs.day == rhs.day) && (lhs.time_of_day == rhs.time_of_day));
}
static BOOST_CXX14_CONSTEXPR
bool is_less(const time_rep_type& lhs, const time_rep_type& rhs)
{
if (lhs.day < rhs.day) return true;
if (lhs.day > rhs.day) return false;
return (lhs.time_of_day < rhs.time_of_day);
}
static BOOST_CXX14_CONSTEXPR
time_rep_type add_days(const time_rep_type& base,
const date_duration_type& dd)
{
return time_rep_type(base.day+dd, base.time_of_day);
}
static BOOST_CXX14_CONSTEXPR
time_rep_type subtract_days(const time_rep_type& base,
const date_duration_type& dd)
{
return split_timedate_system::get_time_rep(base.day-dd, base.time_of_day);
}
static BOOST_CXX14_CONSTEXPR
time_rep_type subtract_time_duration(const time_rep_type& base,
const time_duration_type& td)
{
if(base.day.is_special() || td.is_special())
{
return split_timedate_system::get_time_rep(base.day, -td);
}
if (td.is_negative()) {
time_duration_type td1 = td.invert_sign();
return add_time_duration(base,td1);
}
wrap_int_type day_offset(base.time_of_day.ticks());
date_duration_type day_overflow(static_cast(day_offset.subtract(td.ticks())));
return time_rep_type(base.day-day_overflow,
time_duration_type(0,0,0,day_offset.as_int()));
}
static BOOST_CXX14_CONSTEXPR
time_rep_type add_time_duration(const time_rep_type& base,
time_duration_type td)
{
if(base.day.is_special() || td.is_special()) {
return split_timedate_system::get_time_rep(base.day, td);
}
if (td.is_negative()) {
time_duration_type td1 = td.invert_sign();
return subtract_time_duration(base,td1);
}
wrap_int_type day_offset(base.time_of_day.ticks());
date_duration_type day_overflow(static_cast< typename date_duration_type::duration_rep_type >(day_offset.add(td.ticks())));
return time_rep_type(base.day+day_overflow,
time_duration_type(0,0,0,day_offset.as_int()));
}
static BOOST_CXX14_CONSTEXPR
time_duration_type subtract_times(const time_rep_type& lhs,
const time_rep_type& rhs)
{
date_duration_type dd = lhs.day - rhs.day;
if (BOOST_LIKELY(!dd.is_special())) {
time_duration_type td(dd.days()*24,0,0); // days * 24 hours
time_duration_type td2 = lhs.time_of_day - rhs.time_of_day;
return td+td2;
} else {
time_duration_type td(dd.as_special());
time_duration_type td2 = lhs.time_of_day - rhs.time_of_day;
return td+td2;
}
}
};
} } //namespace date_time
#endif