author | Simon Howkins <simonh@symbian.org> |
Thu, 28 Oct 2010 12:05:33 +0100 | |
branch | RCL_3 |
changeset 78 | 5b3c983434ca |
parent 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
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#ifndef DATE_TIME_TIME_DURATION_HPP___ |
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#define DATE_TIME_TIME_DURATION_HPP___ |
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/* Copyright (c) 2002,2003 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 or http://www.boost.org/LICENSE-1.0) |
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* Author: Jeff Garland, Bart Garst |
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* $Date: 2006/03/20 13:29:15 $ |
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*/ |
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#include "boost/operators.hpp" |
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#include "boost/date_time/time_defs.hpp" |
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#include "boost/date_time/special_defs.hpp" |
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#include "boost/date_time/compiler_config.hpp" |
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namespace boost { |
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namespace date_time { |
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//! Represents some amount of elapsed time measure to a given resolution |
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/*! This class represents a standard set of capabilities for all |
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counted time durations. Time duration implementations should derive |
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from this class passing their type as the first template parameter. |
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This design allows the subclass duration types to provide custom |
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construction policies or other custom features not provided here. |
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|
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@param T The subclass type |
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@param rep_type The time resolution traits for this duration type. |
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*/ |
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template<class T, typename rep_type> |
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class time_duration : private |
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boost::less_than_comparable<T |
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, boost::equality_comparable<T |
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> > |
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/* dividable, addable, and subtractable operator templates |
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* won't work with this class (MSVC++ 6.0). return type |
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* from '+=' is different than expected return type |
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* from '+'. multipliable probably wont work |
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* either (haven't tried) */ |
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{ |
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public: |
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typedef T duration_type; //the subclass |
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typedef rep_type traits_type; |
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typedef typename rep_type::day_type day_type; |
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typedef typename rep_type::hour_type hour_type; |
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typedef typename rep_type::min_type min_type; |
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typedef typename rep_type::sec_type sec_type; |
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typedef typename rep_type::fractional_seconds_type fractional_seconds_type; |
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typedef typename rep_type::tick_type tick_type; |
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typedef typename rep_type::impl_type impl_type; |
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time_duration() : ticks_(0) {} |
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time_duration(hour_type hours_in, |
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min_type minutes_in, |
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sec_type seconds_in=0, |
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fractional_seconds_type frac_sec_in = 0) : |
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ticks_(rep_type::to_tick_count(hours_in,minutes_in,seconds_in,frac_sec_in)) |
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{} |
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// copy constructor required for dividable<> |
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//! Construct from another time_duration (Copy constructor) |
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time_duration(const time_duration<T, rep_type>& other) |
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: ticks_(other.ticks_) |
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{} |
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//! Construct from special_values |
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time_duration(special_values sv) : ticks_(impl_type::from_special(sv)) |
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{} |
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//! Returns smallest representable duration |
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static duration_type unit() |
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{ |
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return duration_type(0,0,0,1); |
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} |
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//! Return the number of ticks in a second |
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static tick_type ticks_per_second() |
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{ |
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return rep_type::res_adjust(); |
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} |
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//! Provide the resolution of this duration type |
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static time_resolutions resolution() |
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{ |
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return rep_type::resolution(); |
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} |
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//! Returns number of hours in the duration |
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hour_type hours() const |
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{ |
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return static_cast<hour_type>(ticks() / (3600*ticks_per_second())); |
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} |
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//! Returns normalized number of minutes |
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min_type minutes() const |
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{ |
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return static_cast<min_type>((ticks() / (60*ticks_per_second())) % 60); |
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} |
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//! Returns normalized number of seconds (0..60) |
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sec_type seconds() const |
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{ |
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return static_cast<sec_type>((ticks()/ticks_per_second()) % 60); |
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} |
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//! Returns total number of seconds truncating any fractional seconds |
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sec_type total_seconds() const |
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{ |
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return static_cast<sec_type>(ticks() / ticks_per_second()); |
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} |
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//! Returns total number of milliseconds truncating any fractional seconds |
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104 |
tick_type total_milliseconds() const |
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105 |
{ |
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106 |
if (ticks_per_second() < 1000) { |
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return ticks() * (static_cast<tick_type>(1000) / ticks_per_second()); |
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108 |
} |
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return ticks() / (ticks_per_second() / static_cast<tick_type>(1000)) ; |
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110 |
} |
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111 |
//! Returns total number of nanoseconds truncating any sub millisecond values |
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112 |
tick_type total_nanoseconds() const |
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113 |
{ |
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114 |
if (ticks_per_second() < 1000000000) { |
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115 |
return ticks() * (static_cast<tick_type>(1000000000) / ticks_per_second()); |
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116 |
} |
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return ticks() / (ticks_per_second() / static_cast<tick_type>(1000000000)) ; |
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118 |
} |
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119 |
//! Returns total number of microseconds truncating any sub microsecond values |
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tick_type total_microseconds() const |
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121 |
{ |
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if (ticks_per_second() < 1000000) { |
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return ticks() * (static_cast<tick_type>(1000000) / ticks_per_second()); |
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124 |
} |
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return ticks() / (ticks_per_second() / static_cast<tick_type>(1000000)) ; |
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126 |
} |
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//! Returns count of fractional seconds at given resolution |
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fractional_seconds_type fractional_seconds() const |
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129 |
{ |
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return (ticks() % ticks_per_second()); |
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131 |
} |
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132 |
//! Returns number of possible digits in fractional seconds |
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static unsigned short num_fractional_digits() |
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134 |
{ |
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135 |
return rep_type::num_fractional_digits(); |
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136 |
} |
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137 |
duration_type invert_sign() const |
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138 |
{ |
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139 |
return duration_type(ticks_ * (-1)); |
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140 |
} |
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141 |
bool is_negative() const |
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142 |
{ |
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143 |
return ticks_ < 0; |
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144 |
} |
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145 |
bool operator<(const time_duration& rhs) const |
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146 |
{ |
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return ticks_ < rhs.ticks_; |
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148 |
} |
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bool operator==(const time_duration& rhs) const |
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150 |
{ |
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return ticks_ == rhs.ticks_; |
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152 |
} |
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//! unary- Allows for time_duration td = -td1 |
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154 |
duration_type operator-()const |
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155 |
{ |
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156 |
return duration_type(ticks_ * (-1)); |
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157 |
} |
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158 |
duration_type operator-(const duration_type& d) const |
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159 |
{ |
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160 |
return duration_type(ticks_ - d.ticks_); |
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161 |
} |
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162 |
duration_type operator+(const duration_type& d) const |
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163 |
{ |
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164 |
return duration_type(ticks_ + d.ticks_); |
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165 |
} |
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166 |
duration_type operator/(int divisor) const |
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167 |
{ |
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168 |
return duration_type(ticks_ / divisor); |
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169 |
} |
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duration_type operator-=(const duration_type& d) |
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171 |
{ |
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ticks_ = ticks_ - d.ticks_; |
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return duration_type(ticks_); |
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174 |
} |
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175 |
duration_type operator+=(const duration_type& d) |
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176 |
{ |
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ticks_ = ticks_ + d.ticks_; |
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return duration_type(ticks_); |
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179 |
} |
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180 |
//! Division operations on a duration with an integer. |
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181 |
duration_type operator/=(int divisor) |
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182 |
{ |
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ticks_ = ticks_ / divisor; |
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return duration_type(ticks_); |
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185 |
} |
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186 |
//! Multiplication operations an a duration with an integer |
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187 |
duration_type operator*(int rhs) const |
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188 |
{ |
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return duration_type(ticks_ * rhs); |
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190 |
} |
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191 |
duration_type operator*=(int divisor) |
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192 |
{ |
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ticks_ = ticks_ * divisor; |
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return duration_type(ticks_); |
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195 |
} |
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tick_type ticks() const |
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197 |
{ |
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return traits_type::as_number(ticks_); |
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199 |
} |
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200 |
|
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201 |
//! Is ticks_ a special value? |
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202 |
bool is_special()const |
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203 |
{ |
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if(traits_type::is_adapted()) |
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205 |
{ |
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return ticks_.is_special(); |
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207 |
} |
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208 |
else{ |
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return false; |
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} |
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} |
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//! Is duration pos-infinity |
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bool is_pos_infinity()const |
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{ |
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if(traits_type::is_adapted()) |
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{ |
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return ticks_.is_pos_infinity(); |
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} |
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else{ |
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return false; |
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} |
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} |
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//! Is duration neg-infinity |
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bool is_neg_infinity()const |
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{ |
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if(traits_type::is_adapted()) |
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{ |
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return ticks_.is_neg_infinity(); |
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} |
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else{ |
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return false; |
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} |
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} |
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//! Is duration not-a-date-time |
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bool is_not_a_date_time()const |
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{ |
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if(traits_type::is_adapted()) |
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{ |
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return ticks_.is_nan(); |
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} |
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else{ |
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return false; |
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} |
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} |
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|
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//! Used for special_values output |
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impl_type get_rep()const |
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{ |
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return ticks_; |
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} |
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|
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protected: |
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explicit time_duration(impl_type in) : ticks_(in) {}; |
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impl_type ticks_; |
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}; |
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|
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|
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|
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//! Template for instantiating derived adjusting durations |
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/* These templates are designed to work with multiples of |
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* 10 for frac_of_second and resoultion adjustment |
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*/ |
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template<class base_duration, boost::int64_t frac_of_second> |
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class subsecond_duration : public base_duration |
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{ |
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public: |
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typedef typename base_duration::traits_type traits_type; |
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explicit subsecond_duration(boost::int64_t ss) : |
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base_duration(0,0,0,ss*traits_type::res_adjust()/frac_of_second) |
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{} |
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}; |
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} } //namespace date_time |
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#endif |
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