1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
//
// Copyright 2011-2013 Ettus Research LLC
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
#include <grgsm/misc_utils/time_spec.h>
namespace gr {
namespace gsm {
/***********************************************************************
* Time spec constructors
**********************************************************************/
#define time_spec_init(full, frac) { \
const time_t _full = time_t(full); \
const double _frac = double(frac); \
const int _frac_int = int(_frac); \
_full_secs = _full + _frac_int; \
_frac_secs = _frac - _frac_int; \
if (_frac_secs < 0) {\
_full_secs -= 1; \
_frac_secs += 1; \
} \
}
inline long long fast_llround(const double x){
return (long long)(x + 0.5); // assumption of non-negativity
}
time_spec_t::time_spec_t(const time_spec_t & spec){
time_spec_init(spec.get_full_secs(), spec.get_frac_secs());
}
time_spec_t::time_spec_t(double secs){
time_spec_init(0, secs);
}
time_spec_t::time_spec_t(time_t full_secs, double frac_secs){
time_spec_init(full_secs, frac_secs);
}
time_spec_t::time_spec_t(time_t full_secs, long tick_count, double tick_rate){
const double frac_secs = tick_count/tick_rate;
time_spec_init(full_secs, frac_secs);
}
time_spec_t time_spec_t::from_ticks(long long ticks, double tick_rate){
const long long rate_i = (long long)(tick_rate);
const double rate_f = tick_rate - rate_i;
const time_t secs_full = time_t(ticks/rate_i);
const long long ticks_error = ticks - (secs_full*rate_i);
const double ticks_frac = ticks_error - secs_full*rate_f;
return time_spec_t(secs_full, ticks_frac/tick_rate);
}
/***********************************************************************
* Time spec accessors
**********************************************************************/
long time_spec_t::get_tick_count(double tick_rate) const{
return long(fast_llround(this->get_frac_secs()*tick_rate));
}
long long time_spec_t::to_ticks(double tick_rate) const{
const long long rate_i = (long long)(tick_rate);
const double rate_f = tick_rate - rate_i;
const long long ticks_full = this->get_full_secs()*rate_i;
const double ticks_error = this->get_full_secs()*rate_f;
const double ticks_frac = this->get_frac_secs()*tick_rate;
return ticks_full + fast_llround(ticks_error + ticks_frac);
}
double time_spec_t::get_real_secs(void) const{
return this->get_full_secs() + this->get_frac_secs();
}
/***********************************************************************
* Time spec math overloads
**********************************************************************/
time_spec_t &time_spec_t::operator+=(const time_spec_t &rhs){
time_spec_init(
this->get_full_secs() + rhs.get_full_secs(),
this->get_frac_secs() + rhs.get_frac_secs()
);
return *this;
}
time_spec_t &time_spec_t::operator-=(const time_spec_t &rhs){
time_spec_init(
this->get_full_secs() - rhs.get_full_secs(),
this->get_frac_secs() - rhs.get_frac_secs()
);
return *this;
}
bool operator==(const time_spec_t &lhs, const time_spec_t &rhs){
return
lhs.get_full_secs() == rhs.get_full_secs() and
lhs.get_frac_secs() == rhs.get_frac_secs()
;
}
bool operator<(const time_spec_t &lhs, const time_spec_t &rhs){
return (
(lhs.get_full_secs() < rhs.get_full_secs()) or (
(lhs.get_full_secs() == rhs.get_full_secs()) and
(lhs.get_frac_secs() < rhs.get_frac_secs())
));
}
}
}
|
