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/**
* @file lldate.cpp
* @author Phoenix
* @date 2006-02-05
* @brief Implementation of the date class
*
* Copyright (c) 2006-$CurrentYear$, Linden Research, Inc.
* $License$
*/
#include "linden_common.h"
#include "lldate.h"
#include "apr-1/apr_time.h"
#include <iomanip>
#include <sstream>
static const F64 DATE_EPOCH = 0.0;
static const F64 LL_APR_USEC_PER_SEC = 1000000.0;
// should be APR_USEC_PER_SEC, but that relies on INT64_C which
// isn't defined in glib under our build set up for some reason
LLDate::LLDate() : mSecondsSinceEpoch(DATE_EPOCH)
{
}
LLDate::LLDate(const LLDate& date) :
mSecondsSinceEpoch(date.mSecondsSinceEpoch)
{
}
LLDate::LLDate(F64 seconds_since_epoch) :
mSecondsSinceEpoch(seconds_since_epoch)
{
}
LLDate::LLDate(const std::string& iso8601_date)
{
if(!fromString(iso8601_date))
{
mSecondsSinceEpoch = DATE_EPOCH;
}
}
std::string LLDate::asString() const
{
std::ostringstream stream;
toStream(stream);
return stream.str();
}
//@ brief Converts time in seconds since EPOCH
// to RFC 1123 compliant date format
// E.g. 1184797044.037586 == Wednesday, 18 Jul 2007 22:17:24 GMT
// in RFC 1123. HTTP dates are always in GMT and RFC 1123
// is one of the standards used and the prefered format
std::string LLDate::asRFC1123() const
{
std::ostringstream stream;
toHTTPDateStream(stream);
return stream.str();
}
void LLDate::toHTTPDateStream(std::ostream& s) const
{
// http://apr.apache.org/docs/apr/0.9/group__apr__time.html
apr_time_t time = (apr_time_t)(mSecondsSinceEpoch * LL_APR_USEC_PER_SEC);
apr_time_exp_t exp_time ; //Apache time module
if (apr_time_exp_gmt(&exp_time, time) != APR_SUCCESS)
{
// Return Epoch UTC date
s << "Thursday, 01 Jan 1970 00:00:00 GMT" ;
return;
}
s << std::dec << std::setfill('0');
#if( LL_WINDOWS || __GNUC__ > 2)
s << std::right ;
#else
s.setf(ios::right);
#endif
std::string day = weekdays[exp_time.tm_wday];
std::string month = months[exp_time.tm_mon];
s << std::setw(day.length()) << (day)
<< ", " << std::setw(2) << (exp_time.tm_mday)
<< ' ' << std::setw(month.length()) << (month)
<< ' ' << std::setw(4) << (exp_time.tm_year + 1900)
<< ' ' << std::setw(2) << (exp_time.tm_hour)
<< ':' << std::setw(2) << (exp_time.tm_min)
<< ':' << std::setw(2) << (exp_time.tm_sec)
<< " GMT";
// RFC 1123 date does not use microseconds
llinfos << "Date in RFC 1123 format is " << s << llendl;
}
void LLDate::toStream(std::ostream& s) const
{
apr_time_t time = (apr_time_t)(mSecondsSinceEpoch * LL_APR_USEC_PER_SEC);
apr_time_exp_t exp_time;
if (apr_time_exp_gmt(&exp_time, time) != APR_SUCCESS)
{
s << "1970-01-01T00:00:00Z";
return;
}
s << std::dec << std::setfill('0');
#if( LL_WINDOWS || __GNUC__ > 2)
s << std::right;
#else
s.setf(ios::right);
#endif
s << std::setw(4) << (exp_time.tm_year + 1900)
<< '-' << std::setw(2) << (exp_time.tm_mon + 1)
<< '-' << std::setw(2) << (exp_time.tm_mday)
<< 'T' << std::setw(2) << (exp_time.tm_hour)
<< ':' << std::setw(2) << (exp_time.tm_min)
<< ':' << std::setw(2) << (exp_time.tm_sec);
if (exp_time.tm_usec > 0)
{
s << '.' << std::setw(2)
<< (int)(exp_time.tm_usec / (LL_APR_USEC_PER_SEC / 100));
}
s << 'Z';
}
bool LLDate::fromString(const std::string& iso8601_date)
{
std::istringstream stream(iso8601_date);
return fromStream(stream);
}
bool LLDate::fromStream(std::istream& s)
{
struct apr_time_exp_t exp_time;
apr_int32_t tm_part;
int c;
s >> tm_part;
exp_time.tm_year = tm_part - 1900;
c = s.get(); // skip the hypen
if (c != '-') { return false; }
s >> tm_part;
exp_time.tm_mon = tm_part - 1;
c = s.get(); // skip the hypen
if (c != '-') { return false; }
s >> tm_part;
exp_time.tm_mday = tm_part;
c = s.get(); // skip the T
if (c != 'T') { return false; }
s >> tm_part;
exp_time.tm_hour = tm_part;
c = s.get(); // skip the :
if (c != ':') { return false; }
s >> tm_part;
exp_time.tm_min = tm_part;
c = s.get(); // skip the :
if (c != ':') { return false; }
s >> tm_part;
exp_time.tm_sec = tm_part;
// zero out the unused fields
exp_time.tm_usec = 0;
exp_time.tm_wday = 0;
exp_time.tm_yday = 0;
exp_time.tm_isdst = 0;
exp_time.tm_gmtoff = 0;
// generate a time_t from that
apr_time_t time;
if (apr_time_exp_gmt_get(&time, &exp_time) != APR_SUCCESS)
{
return false;
}
F64 seconds_since_epoch = time / LL_APR_USEC_PER_SEC;
// check for fractional
c = s.peek();
if(c == '.')
{
F64 fractional = 0.0;
s >> fractional;
seconds_since_epoch += fractional;
}
s.get(); // skip the Z
if (c != 'Z') { return false; }
mSecondsSinceEpoch = seconds_since_epoch;
return true;
}
F64 LLDate::secondsSinceEpoch() const
{
return mSecondsSinceEpoch;
}
void LLDate::secondsSinceEpoch(F64 seconds)
{
mSecondsSinceEpoch = seconds;
}
std::ostream& operator<<(std::ostream& s, const LLDate& date)
{
date.toStream(s);
return s;
}
std::istream& operator>>(std::istream& s, LLDate& date)
{
date.fromStream(s);
return s;
}
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