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utc offset support (%z) in pattern formatter

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This commit is contained in:
gabi
2014-10-19 17:44:57 +03:00
parent 32a8b51d05
commit e148b939fd
2 changed files with 107 additions and 46 deletions
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35
include/c11log/details/os.h
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@@ -33,6 +33,25 @@ inline std::tm localtime()
return localtime(now_t);
}
inline std::tm gmtime(const std::time_t &time_tt)
{
#ifdef _WIN32
std::tm tm;
gmtime_s(&tm, &time_tt);
#else
std::tm tm;
lgmtime_r(&time_tt, &tm);
#endif
return tm;
}
inline std::tm gmtime()
{
std::time_t now_t = time(0);
return gmtime(now_t);
}
inline bool operator==(const std::tm& tm1, const std::tm& tm2)
{
return (tm1.tm_sec == tm2.tm_sec &&
@@ -46,7 +65,7 @@ inline bool operator==(const std::tm& tm1, const std::tm& tm2)
inline bool operator!=(const std::tm& tm1, const std::tm& tm2)
{
return !(tm1==tm2);
return !(tm1 == tm2);
}
#ifdef _WIN32
@@ -84,14 +103,18 @@ inline bool fopen_s(FILE** fp, const std::string& filename, const char* mode)
#endif
}
inline float tz_offset()
//Return utc offset in minutes or -1 on failure
inline int utc_minutes_offset(const std::tm& tm = localtime())
{
#ifdef _WIN32
TIME_ZONE_INFORMATION tzinfo;
GetTimeZoneInformation(&tzinfo);
return tzinfo.Bias / -60.0f;
DYNAMIC_TIME_ZONE_INFORMATION tzinfo;
auto rv = GetDynamicTimeZoneInformation(&tzinfo);
if (!rv)
return -1;
return -1 * (tzinfo.Bias + tzinfo.DaylightBias);
#else
return 0.0f;
return tm.tm_gmtoff / 60;
#endif
}