lldate.cpp
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- /**
- * @file lldate.cpp
- * @author Phoenix
- * @date 2006-02-05
- * @brief Implementation of the date class
- *
- * $LicenseInfo:firstyear=2006&license=viewergpl$
- *
- * Copyright (c) 2006-2010, Linden Research, Inc.
- *
- * Second Life Viewer Source Code
- * The source code in this file ("Source Code") is provided by Linden Lab
- * to you under the terms of the GNU General Public License, version 2.0
- * ("GPL"), unless you have obtained a separate licensing agreement
- * ("Other License"), formally executed by you and Linden Lab. Terms of
- * the GPL can be found in doc/GPL-license.txt in this distribution, or
- * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
- *
- * There are special exceptions to the terms and conditions of the GPL as
- * it is applied to this Source Code. View the full text of the exception
- * in the file doc/FLOSS-exception.txt in this software distribution, or
- * online at
- * http://secondlifegrid.net/programs/open_source/licensing/flossexception
- *
- * By copying, modifying or distributing this software, you acknowledge
- * that you have read and understood your obligations described above,
- * and agree to abide by those obligations.
- *
- * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
- * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
- * COMPLETENESS OR PERFORMANCE.
- * $/LicenseInfo$
- */
- #include "linden_common.h"
- #include "lldate.h"
- #include "apr_time.h"
- #include <time.h>
- #include <locale.h>
- #include <string>
- #include <iomanip>
- #include <sstream>
- #include "lltimer.h"
- #include "llstring.h"
- 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))
- {
- llwarns << "date " << iso8601_date << " failed to parse; "
- << "ZEROING IT OUT" << llendl;
- 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
- {
- return toHTTPDateString (std::string ("%A, %d %b %Y %H:%M:%S GMT"));
- }
- LLFastTimer::DeclareTimer FT_DATE_FORMAT("Date Format");
- std::string LLDate::toHTTPDateString (std::string fmt) const
- {
- LLFastTimer ft1(FT_DATE_FORMAT);
-
- time_t locSeconds = (time_t) mSecondsSinceEpoch;
- struct tm * gmt = gmtime (&locSeconds);
- return toHTTPDateString(gmt, fmt);
- }
- std::string LLDate::toHTTPDateString (tm * gmt, std::string fmt)
- {
- LLFastTimer ft1(FT_DATE_FORMAT);
- // avoid calling setlocale() unnecessarily - it's expensive.
- static std::string prev_locale = "";
- std::string this_locale = LLStringUtil::getLocale();
- if (this_locale != prev_locale)
- {
- setlocale(LC_TIME, this_locale.c_str());
- prev_locale = this_locale;
- }
- // use strftime() as it appears to be faster than std::time_put
- char buffer[128];
- strftime(buffer, 128, fmt.c_str(), gmt);
- return std::string(buffer);
- }
- 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'
- << std::setfill(' ');
- }
- bool LLDate::split(S32 *year, S32 *month, S32 *day, S32 *hour, S32 *min, S32 *sec) 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)
- {
- return false;
- }
- if (year)
- *year = exp_time.tm_year + 1900;
- if (month)
- *month = exp_time.tm_mon + 1;
- if (day)
- *day = exp_time.tm_mday;
- if (hour)
- *hour = exp_time.tm_hour;
- if (min)
- *min = exp_time.tm_min;
- if (sec)
- *sec = exp_time.tm_sec;
- return true;
- }
- 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;
- }
- c = s.get(); // skip the Z
- if (c != 'Z') { return false; }
- mSecondsSinceEpoch = seconds_since_epoch;
- return true;
- }
- bool LLDate::fromYMDHMS(S32 year, S32 month, S32 day, S32 hour, S32 min, S32 sec)
- {
- struct apr_time_exp_t exp_time;
-
- exp_time.tm_year = year - 1900;
- exp_time.tm_mon = month - 1;
- exp_time.tm_mday = day;
- exp_time.tm_hour = hour;
- exp_time.tm_min = min;
- exp_time.tm_sec = sec;
- // 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;
- }
-
- mSecondsSinceEpoch = time / LL_APR_USEC_PER_SEC;
- return true;
- }
- F64 LLDate::secondsSinceEpoch() const
- {
- return mSecondsSinceEpoch;
- }
- void LLDate::secondsSinceEpoch(F64 seconds)
- {
- mSecondsSinceEpoch = seconds;
- }
- /* static */ LLDate LLDate::now()
- {
- // time() returns seconds, we want fractions of a second, which LLTimer provides --RN
- return LLDate(LLTimer::getTotalSeconds());
- }
- bool LLDate::operator<(const LLDate& rhs) const
- {
- return mSecondsSinceEpoch < rhs.mSecondsSinceEpoch;
- }
- 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;
- }