167 lines
5.2 KiB
C++
167 lines
5.2 KiB
C++
/**
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* @file lldate.h
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* @author Phoenix
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* @date 2006-02-05
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* @brief Declaration of a simple date class.
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*
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* $LicenseInfo:firstyear=2006&license=viewergpl$
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*
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* Copyright (c) 2006-2009, Linden Research, Inc.
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at
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* http://secondlifegrid.net/programs/open_source/licensing/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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* $/LicenseInfo$
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*/
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#ifndef LL_LLDATE_H
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#define LL_LLDATE_H
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#include <iosfwd>
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#include <string>
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#include "llpreprocessor.h"
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#include "stdtypes.h"
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/**
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* @class LLDate
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* @brief This class represents a particular point in time in UTC.
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*
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* The date class represents a point in time after epoch - 1970-01-01.
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*/
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class LL_COMMON_API LLDate
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{
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public:
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/**
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* @brief Construct a date equal to epoch.
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*/
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LLDate();
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/**
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* @brief Construct a date equal to the source date.
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*/
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LLDate(const LLDate& date);
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/**
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* @brief Construct a date from a seconds since epoch value.
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*
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* @pararm seconds_since_epoch The number of seconds since UTC epoch.
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*/
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LLDate(F64 seconds_since_epoch);
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/**
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* @brief Construct a date from a string representation
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*
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* The date is constructed in the <code>fromString()</code>
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* method. See that method for details of supported formats.
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* If that method fails to parse the date, the date is set to epoch.
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* @param iso8601_date An iso-8601 compatible representation of the date.
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*/
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LLDate(const std::string& iso8601_date);
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/**
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* @brief Return the date as in ISO-8601 string.
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*
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* @return A string representation of the date.
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*/
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std::string asString() const;
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std::string asRFC1123() const;
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void toStream(std::ostream&) const;
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bool split(S32 *year, S32 *month = NULL, S32 *day = NULL, S32 *hour = NULL, S32 *min = NULL, S32 *sec = NULL) const;
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std::string toHTTPDateString (std::string fmt) const;
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static std::string toHTTPDateString (tm * gmt, std::string fmt);
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/**
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* @brief Set the date from an ISO-8601 string.
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*
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* The parser only supports strings conforming to
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* YYYYF-MM-DDTHH:MM:SS.FFZ where Y is year, M is month, D is day,
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* H is hour, M is minute, S is second, F is sub-second, and all
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* other characters are literal.
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* If this method fails to parse the date, the previous date is
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* retained.
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* @param iso8601_date An iso-8601 compatible representation of the date.
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* @return Returns true if the string was successfully parsed.
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*/
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bool fromString(const std::string& iso8601_date);
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bool fromStream(std::istream&);
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bool fromYMDHMS(S32 year, S32 month = 1, S32 day = 0, S32 hour = 0, S32 min = 0, S32 sec = 0);
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/**
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* @brief Return the date in seconds since epoch.
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*
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* @return The number of seconds since epoch UTC.
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*/
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F64 secondsSinceEpoch() const;
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/**
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* @brief Set the date in seconds since epoch.
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*
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* @param seconds The number of seconds since epoch UTC.
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*/
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void secondsSinceEpoch(F64 seconds);
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/**
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* @brief Create an LLDate object set to the current time.
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*
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* @return The number of seconds since epoch UTC.
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*/
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static LLDate now();
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/**
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* @brief Compare dates using operator< so we can order them using STL.
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*
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* @param rhs -- the right hand side of the comparison operator
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*/
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bool operator<(const LLDate& rhs) const;
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/**
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* @brief Remaining comparison operators in terms of operator<
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* This conforms to the expectation of STL.
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*
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* @param rhs -- the right hand side of the comparison operator
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*/
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bool operator>(const LLDate& rhs) const { return rhs < *this; }
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bool operator<=(const LLDate& rhs) const { return !(rhs < *this); }
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bool operator>=(const LLDate& rhs) const { return !(*this < rhs); }
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bool operator!=(const LLDate& rhs) const { return (*this < rhs) || (rhs < *this); }
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bool operator==(const LLDate& rhs) const { return !(*this != rhs); }
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/**
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* @brief Compare to epoch UTC.
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*/
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bool isNull() const { return mSecondsSinceEpoch == 0.0; }
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bool notNull() const { return mSecondsSinceEpoch != 0.0; }
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private:
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F64 mSecondsSinceEpoch;
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};
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// Helper function to stream out a date
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LL_COMMON_API std::ostream& operator<<(std::ostream& s, const LLDate& date);
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// Helper function to stream in a date
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LL_COMMON_API std::istream& operator>>(std::istream& s, LLDate& date);
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#endif // LL_LLDATE_H
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