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
|
/*******************************************************************************
* librepfunc - a collection of common functions, classes and tools.
* See the README file for copyright information and how to reach the author.
******************************************************************************/
#include <sstream> // std:.stringstream
#include <iomanip> // std::setfill, std::setw, std::right
#include <ctime> // time_t, time(), ..
#include <repfunc.h> // include this library
std::string ISO8601Date(std::intmax_t t) {
auto IntToStr = [](std::intmax_t n, size_t width) {
std::stringstream ss;
ss << std::setfill('0') << std::setw(width) << std::right << n;
return ss.str();
};
time_t aTime;
if (t == 0)
aTime = time(nullptr);
else
aTime = (time_t) t;
struct tm buf;
struct tm* tm = localtime_r(&aTime, &buf);
#if !defined(__MINGW32__) && !defined(__MING64__)
std::string UTC_Offset;
if (tm->tm_gmtoff != 0) {
if (tm->tm_gmtoff > 0)
UTC_Offset = "+";
else
UTC_Offset = "-";
size_t HH = abs(tm->tm_gmtoff) / 3600;
size_t MM = abs(tm->tm_gmtoff) % 3600;
UTC_Offset += IntToStr(HH, 2) + ":" + IntToStr(MM, 2);
}
else
UTC_Offset = "Z";
#else
/* msys2/mingw64 doesn't have tm_gmtoff */
const char* UTC_Offset = "Z";
#endif
return IntToStr(1900+tm->tm_year,4) +
'-' +
IntToStr(1+tm->tm_mon,2) +
'-' +
IntToStr(tm->tm_mday,2) +
'T' +
IntToStr(tm->tm_hour,2) +
':' +
IntToStr(tm->tm_min,2) +
':' +
IntToStr(tm->tm_sec,2) +
UTC_Offset;
}
|
