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
|
#include "common.hh"
#include "date.hh"
#include <pthread.h>
#include <time.h>
namespace {
// localtime_r doesn't guarantee to call tzset as localtime does.
pthread_once_t tzset_called = PTHREAD_ONCE_INIT;
} // namespace
Date Date::from_format(std::string const& format,
std::string const& str,
bool local_time) {
struct tm tm = {};
tm.tm_isdst = -1; // Must be -1 so that mktime figures it out by itself.
auto* end = strptime(str.c_str(), format.c_str(), &tm);
if (end && !*end)
return local_time ? mktime(&tm) : timegm(&tm);
return Date();
}
std::string Date::to_format(std::string const& format,
bool local_time) const {
if (empty() || format.empty())
return std::string();
if (local_time)
pthread_once(&tzset_called, tzset);
struct tm mem = {};
auto* tm = local_time ? localtime_r(&time_, &mem) : gmtime_r(&time_, &mem);
if (!tm)
return std::string();
std::string ret;
ret.resize(64);
while (true) {
auto len = strftime(ret.data(), ret.size(), format.c_str(), tm);
if (len > 0) {
ret.resize(len);
return ret;
}
ret.resize(ret.size() * 2);
}
}
Date Date::day(bool local_time) const {
if (empty())
return *this;
if (local_time)
pthread_once(&tzset_called, tzset);
struct tm tm = {};
auto* ret = local_time ? localtime_r(&time_, &tm) : gmtime_r(&time_, &tm);
if (!ret)
return *this;
ret->tm_hour = 0;
ret->tm_min = 0;
ret->tm_sec = 0;
return local_time ? mktime(ret) : timegm(ret);
}
|
