1 | #ifndef DATE_TIME_TIME_RESOLUTION_TRAITS_HPP |
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2 | #define DATE_TIME_TIME_RESOLUTION_TRAITS_HPP |
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3 | |
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4 | /* Copyright (c) 2002,2003 CrystalClear Software, Inc. |
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5 | * Use, modification and distribution is subject to the |
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6 | * Boost Software License, Version 1.0. (See accompanying |
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7 | * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt) |
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8 | * Author: Jeff Garland, Bart Garst |
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9 | * $Date: 2009-06-06 07:25:55 -0400 (Sat, 06 Jun 2009) $ |
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10 | */ |
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11 | |
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12 | |
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13 | #include <boost/cstdint.hpp> |
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14 | #include <boost/date_time/time_defs.hpp> |
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15 | #include <boost/date_time/int_adapter.hpp> |
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16 | #include <boost/date_time/compiler_config.hpp> |
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17 | |
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18 | namespace boost { |
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19 | namespace date_time { |
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20 | |
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21 | //! Simple function to calculate absolute value of a numeric type |
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22 | template <typename T> |
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23 | // JDG [7/6/02 made a template], |
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24 | // moved here from time_duration.hpp 2003-Sept-4. |
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25 | inline T absolute_value(T x) |
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26 | { |
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27 | return x < 0 ? -x : x; |
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28 | } |
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29 | |
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30 | //! traits struct for time_resolution_traits implementation type |
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31 | struct time_resolution_traits_bi32_impl { |
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32 | typedef boost::int32_t int_type; |
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33 | typedef boost::int32_t impl_type; |
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34 | static int_type as_number(impl_type i){ return i;} |
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35 | //! Used to determine if implemented type is int_adapter or int |
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36 | static bool is_adapted() { return false;} |
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37 | }; |
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38 | //! traits struct for time_resolution_traits implementation type |
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39 | struct time_resolution_traits_adapted32_impl { |
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40 | typedef boost::int32_t int_type; |
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41 | typedef boost::date_time::int_adapter<boost::int32_t> impl_type; |
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42 | static int_type as_number(impl_type i){ return i.as_number();} |
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43 | //! Used to determine if implemented type is int_adapter or int |
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44 | static bool is_adapted() { return true;} |
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45 | }; |
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46 | //! traits struct for time_resolution_traits implementation type |
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47 | struct time_resolution_traits_bi64_impl { |
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48 | typedef boost::int64_t int_type; |
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49 | typedef boost::int64_t impl_type; |
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50 | static int_type as_number(impl_type i){ return i;} |
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51 | //! Used to determine if implemented type is int_adapter or int |
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52 | static bool is_adapted() { return false;} |
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53 | }; |
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54 | //! traits struct for time_resolution_traits implementation type |
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55 | struct time_resolution_traits_adapted64_impl { |
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56 | typedef boost::int64_t int_type; |
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57 | typedef boost::date_time::int_adapter<boost::int64_t> impl_type; |
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58 | static int_type as_number(impl_type i){ return i.as_number();} |
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59 | //! Used to determine if implemented type is int_adapter or int |
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60 | static bool is_adapted() { return true;} |
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61 | }; |
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62 | |
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63 | template<typename frac_sec_type, |
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64 | time_resolutions res, |
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65 | #if (defined(BOOST_MSVC) && (_MSC_VER < 1300)) |
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66 | boost::int64_t resolution_adjust, |
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67 | #else |
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68 | typename frac_sec_type::int_type resolution_adjust, |
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69 | #endif |
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70 | unsigned short frac_digits, |
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71 | typename v_type = boost::int32_t > |
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72 | class time_resolution_traits { |
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73 | public: |
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74 | typedef typename frac_sec_type::int_type fractional_seconds_type; |
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75 | typedef typename frac_sec_type::int_type tick_type; |
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76 | typedef typename frac_sec_type::impl_type impl_type; |
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77 | typedef v_type day_type; |
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78 | typedef v_type hour_type; |
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79 | typedef v_type min_type; |
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80 | typedef v_type sec_type; |
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81 | |
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82 | // bring in function from frac_sec_type traits structs |
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83 | static fractional_seconds_type as_number(impl_type i) |
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84 | { |
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85 | return frac_sec_type::as_number(i); |
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86 | } |
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87 | static bool is_adapted() |
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88 | { |
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89 | return frac_sec_type::is_adapted(); |
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90 | } |
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91 | |
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92 | //Would like this to be frac_sec_type, but some compilers complain |
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93 | #if (defined(BOOST_MSVC) && (_MSC_VER < 1300)) |
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94 | BOOST_STATIC_CONSTANT(boost::int64_t, ticks_per_second = resolution_adjust); |
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95 | #else |
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96 | BOOST_STATIC_CONSTANT(fractional_seconds_type, ticks_per_second = resolution_adjust); |
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97 | #endif |
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98 | |
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99 | static time_resolutions resolution() |
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100 | { |
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101 | return res; |
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102 | } |
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103 | static unsigned short num_fractional_digits() |
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104 | { |
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105 | return frac_digits; |
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106 | } |
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107 | static fractional_seconds_type res_adjust() |
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108 | { |
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109 | return resolution_adjust; |
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110 | } |
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111 | //! Any negative argument results in a negative tick_count |
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112 | static tick_type to_tick_count(hour_type hours, |
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113 | min_type minutes, |
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114 | sec_type seconds, |
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115 | fractional_seconds_type fs) |
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116 | { |
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117 | if(hours < 0 || minutes < 0 || seconds < 0 || fs < 0) |
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118 | { |
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119 | hours = absolute_value(hours); |
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120 | minutes = absolute_value(minutes); |
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121 | seconds = absolute_value(seconds); |
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122 | fs = absolute_value(fs); |
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123 | return (((((fractional_seconds_type(hours)*3600) |
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124 | + (fractional_seconds_type(minutes)*60) |
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125 | + seconds)*res_adjust()) + fs) * -1); |
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126 | } |
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127 | |
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128 | return (((fractional_seconds_type(hours)*3600) |
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129 | + (fractional_seconds_type(minutes)*60) |
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130 | + seconds)*res_adjust()) + fs; |
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131 | } |
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132 | |
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133 | }; |
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134 | |
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135 | typedef time_resolution_traits<time_resolution_traits_adapted32_impl, milli, 1000, 3 > milli_res; |
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136 | typedef time_resolution_traits<time_resolution_traits_adapted64_impl, micro, 1000000, 6 > micro_res; |
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137 | typedef time_resolution_traits<time_resolution_traits_adapted64_impl, nano, 1000000000, 9 > nano_res; |
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138 | |
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139 | |
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140 | } } //namespace date_time |
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141 | |
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142 | |
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143 | |
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144 | #endif |
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