我有以下时间:
2010-01-25 03:13:34.384 - GMT Time Zone
2010-01-25 11:13:34.384 - My Local
我希望转换为以毫秒为单位的时间戳。但是,由于我仅从调用方获取本地时间字符串
“2010-01-25 11:13:34.384”
如果我这样做:
// ts is "2010-01-25 11:13:34.384" (My Local)
boost::posix_time::ptime t(boost::posix_time::time_from_string(ts));
boost::posix_time::ptime end(boost::gregorian::date(1970,1,1));
boost::posix_time::time_duration dur = t - end;
// epoch is 1264418014384
// 2010-01-25 11:13:34.384 (GMT) -- But I want 2010-01-25 03:13:34.384
// 2010-01-25 19:13:34.384 (My Local) -- But I want 2010-01-25 11:13:34.384
long long epoch = dur.total_milliseconds();
有什么办法告诉boost::posix_time它收到的ts字符串属于我的本地时区吗?
最佳答案
我在本地树中有此名称(省略了命名空间前缀):
/// wall-clock translation to UTC
const ptime from_wall_clock( const ptime& value,
const time_zone_ptr& from )
{
assert( from.get());
// interpret as local time
const local_date_time from_local( value.date(),
value.time_of_day(), from,
local_date_time::NOT_DATE_TIME_ON_ERROR );
// get UTC
return from_local.utc_time();
}