1 | #ifndef DATE_TIME_TIME_RESOLUTION_TRAITS_HPP |
2 | #define DATE_TIME_TIME_RESOLUTION_TRAITS_HPP |
3 | |
4 | /* Copyright (c) 2002,2003 CrystalClear Software, Inc. |
5 | * Use, modification and distribution is subject to the |
6 | * Boost Software License, Version 1.0. (See accompanying |
7 | * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt) |
8 | * Author: Jeff Garland, Bart Garst |
9 | * $Date$ |
10 | */ |
11 | |
12 | |
13 | #include <boost/cstdint.hpp> |
14 | #include <boost/date_time/time_defs.hpp> |
15 | #include <boost/date_time/int_adapter.hpp> |
16 | #include <boost/date_time/compiler_config.hpp> |
17 | |
18 | namespace boost { |
19 | namespace date_time { |
20 | |
21 | //! Simple function to calculate absolute value of a numeric type |
22 | template <typename T> |
23 | // JDG [7/6/02 made a template], |
24 | // moved here from time_duration.hpp 2003-Sept-4. |
25 | inline T absolute_value(T x) |
26 | { |
27 | return x < 0 ? -x : x; |
28 | } |
29 | |
30 | //! traits struct for time_resolution_traits implementation type |
31 | struct time_resolution_traits_bi32_impl { |
32 | typedef boost::int32_t int_type; |
33 | typedef boost::int32_t impl_type; |
34 | static int_type as_number(impl_type i){ return i;} |
35 | //! Used to determine if implemented type is int_adapter or int |
36 | static bool is_adapted() { return false;} |
37 | }; |
38 | //! traits struct for time_resolution_traits implementation type |
39 | struct time_resolution_traits_adapted32_impl { |
40 | typedef boost::int32_t int_type; |
41 | typedef boost::date_time::int_adapter<boost::int32_t> impl_type; |
42 | static int_type as_number(impl_type i){ return i.as_number();} |
43 | //! Used to determine if implemented type is int_adapter or int |
44 | static bool is_adapted() { return true;} |
45 | }; |
46 | //! traits struct for time_resolution_traits implementation type |
47 | struct time_resolution_traits_bi64_impl { |
48 | typedef boost::int64_t int_type; |
49 | typedef boost::int64_t impl_type; |
50 | static int_type as_number(impl_type i){ return i;} |
51 | //! Used to determine if implemented type is int_adapter or int |
52 | static bool is_adapted() { return false;} |
53 | }; |
54 | //! traits struct for time_resolution_traits implementation type |
55 | struct time_resolution_traits_adapted64_impl { |
56 | typedef boost::int64_t int_type; |
57 | typedef boost::date_time::int_adapter<boost::int64_t> impl_type; |
58 | static int_type as_number(impl_type i){ return i.as_number();} |
59 | //! Used to determine if implemented type is int_adapter or int |
60 | static bool is_adapted() { return true;} |
61 | }; |
62 | |
63 | template<typename frac_sec_type, |
64 | time_resolutions res, |
65 | #if (defined(BOOST_MSVC) && (_MSC_VER < 1300)) |
66 | boost::int64_t resolution_adjust, |
67 | #else |
68 | typename frac_sec_type::int_type resolution_adjust, |
69 | #endif |
70 | unsigned short frac_digits, |
71 | typename var_type = boost::int32_t > |
72 | class time_resolution_traits { |
73 | public: |
74 | typedef typename frac_sec_type::int_type fractional_seconds_type; |
75 | typedef typename frac_sec_type::int_type tick_type; |
76 | typedef typename frac_sec_type::impl_type impl_type; |
77 | typedef var_type day_type; |
78 | typedef var_type hour_type; |
79 | typedef var_type min_type; |
80 | typedef var_type sec_type; |
81 | |
82 | // bring in function from frac_sec_type traits structs |
83 | static fractional_seconds_type as_number(impl_type i) |
84 | { |
85 | return frac_sec_type::as_number(i); |
86 | } |
87 | static bool is_adapted() |
88 | { |
89 | return frac_sec_type::is_adapted(); |
90 | } |
91 | |
92 | //Would like this to be frac_sec_type, but some compilers complain |
93 | #if (defined(BOOST_MSVC) && (_MSC_VER < 1300)) |
94 | BOOST_STATIC_CONSTANT(boost::int64_t, ticks_per_second = resolution_adjust); |
95 | #else |
96 | BOOST_STATIC_CONSTANT(fractional_seconds_type, ticks_per_second = resolution_adjust); |
97 | #endif |
98 | |
99 | static time_resolutions resolution() |
100 | { |
101 | return res; |
102 | } |
103 | static unsigned short num_fractional_digits() |
104 | { |
105 | return frac_digits; |
106 | } |
107 | static fractional_seconds_type res_adjust() |
108 | { |
109 | return resolution_adjust; |
110 | } |
111 | //! Any negative argument results in a negative tick_count |
112 | static tick_type to_tick_count(hour_type hours, |
113 | min_type minutes, |
114 | sec_type seconds, |
115 | fractional_seconds_type fs) |
116 | { |
117 | if(hours < 0 || minutes < 0 || seconds < 0 || fs < 0) |
118 | { |
119 | hours = absolute_value(hours); |
120 | minutes = absolute_value(minutes); |
121 | seconds = absolute_value(seconds); |
122 | fs = absolute_value(fs); |
123 | return (((((fractional_seconds_type(hours)*3600) |
124 | + (fractional_seconds_type(minutes)*60) |
125 | + seconds)*res_adjust()) + fs) * -1); |
126 | } |
127 | |
128 | return (((fractional_seconds_type(hours)*3600) |
129 | + (fractional_seconds_type(minutes)*60) |
130 | + seconds)*res_adjust()) + fs; |
131 | } |
132 | |
133 | }; |
134 | |
135 | typedef time_resolution_traits<time_resolution_traits_adapted32_impl, milli, 1000, 3 > milli_res; |
136 | typedef time_resolution_traits<time_resolution_traits_adapted64_impl, micro, 1000000, 6 > micro_res; |
137 | typedef time_resolution_traits<time_resolution_traits_adapted64_impl, nano, 1000000000, 9 > nano_res; |
138 | |
139 | |
140 | } } //namespace date_time |
141 | |
142 | |
143 | |
144 | #endif |
145 | |