1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
/**
* @file lldate.h
* @author Phoenix
* @date 2006-02-05
* @brief Declaration of a simple date class.
*
* $LicenseInfo:firstyear=2006&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#ifndef LL_LLDATE_H
#define LL_LLDATE_H
#include <iosfwd>
#include <string>
#include "stdtypes.h"
#include "llunits.h"
/**
* @class LLDate
* @brief This class represents a particular point in time in UTC.
*
* The date class represents a point in time after epoch - 1970-01-01.
*/
class LL_COMMON_API LLDate
{
static constexpr F64 DATE_EPOCH = 0.0;
public:
using timestamp = F64;
/**
* @brief Construct a date equal to epoch.
*/
constexpr LLDate() : mSecondsSinceEpoch(DATE_EPOCH)
{}
/**
* @brief Construct a date from a seconds since epoch value.
*
* @param seconds_since_epoch The number of seconds since UTC epoch.
*/
LLDate(F64SecondsImplicit seconds_since_epoch);
/**
* @brief Construct a date from a string representation
*
* The date is constructed in the <code>fromString()</code>
* method. See that method for details of supported formats.
* If that method fails to parse the date, the date is set to epoch.
* @param iso8601_date An iso-8601 compatible representation of the date.
*/
LLDate(const std::string& iso8601_date);
/**
* @brief Return the date as in ISO-8601 string.
*
* @return A string representation of the date.
*/
std::string asString() const;
std::string asRFC1123() const;
void toStream(std::ostream&) const;
bool split(S32 *year, S32 *month = NULL, S32 *day = NULL, S32 *hour = NULL, S32 *min = NULL, S32 *sec = NULL) const;
std::string toHTTPDateString (std::string fmt) const;
static std::string toHTTPDateString (tm * gmt, std::string fmt);
/**
* @brief Set the date from an ISO-8601 string.
*
* The parser only supports strings conforming to
* YYYYF-MM-DDTHH:MM:SS.FFZ where Y is year, M is month, D is day,
* H is hour, M is minute, S is second, F is sub-second, and all
* other characters are literal.
* If this method fails to parse the date, the previous date is
* retained.
* @param iso8601_date An iso-8601 compatible representation of the date.
* @return Returns true if the string was successfully parsed.
*/
bool fromString(const std::string& iso8601_date);
bool fromStream(std::istream&);
bool fromYMDHMS(S32 year, S32 month = 1, S32 day = 0, S32 hour = 0, S32 min = 0, S32 sec = 0);
/**
* @brief Return the date in seconds since epoch.
*
* @return The number of seconds since epoch UTC.
*/
timestamp secondsSinceEpoch() const;
/**
* @brief Set the date in seconds since epoch.
*
* @param seconds The number of seconds since epoch UTC.
*/
void secondsSinceEpoch(timestamp seconds);
/**
* @brief Create an LLDate object set to the current time.
*
* @return The number of seconds since epoch UTC.
*/
static LLDate now();
/**
* @brief Compare dates using operator< so we can order them using STL.
*
* @param rhs -- the right hand side of the comparison operator
*/
bool operator<(const LLDate& rhs) const;
/**
* @brief Remaining comparison operators in terms of operator<
* This conforms to the expectation of STL.
*
* @param rhs -- the right hand side of the comparison operator
*/
bool operator>(const LLDate& rhs) const { return rhs < *this; }
bool operator<=(const LLDate& rhs) const { return !(rhs < *this); }
bool operator>=(const LLDate& rhs) const { return !(*this < rhs); }
bool operator!=(const LLDate& rhs) const { return (*this < rhs) || (rhs < *this); }
bool operator==(const LLDate& rhs) const { return !(*this != rhs); }
/**
* @brief Compare to epoch UTC.
*/
bool isNull() const { return mSecondsSinceEpoch == 0.0; }
bool notNull() const { return mSecondsSinceEpoch != 0.0; }
private:
timestamp mSecondsSinceEpoch;
};
// Helper function to stream out a date
LL_COMMON_API std::ostream& operator<<(std::ostream& s, const LLDate& date);
// Helper function to stream in a date
LL_COMMON_API std::istream& operator>>(std::istream& s, LLDate& date);
#endif // LL_LLDATE_H
|
