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
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
|
/*
* Copyright (C) 2009 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef DateComponents_h
#define DateComponents_h
#include <limits>
#include <wtf/Forward.h>
#include <wtf/unicode/Unicode.h>
namespace WebCore {
// A DateComponents instance represents one of the following date and time combinations:
// * Month type: year-month
// * Date type: year-month-day
// * Week type: year-week
// * Time type: hour-minute-second-millisecond
// * DateTime or DateTimeLocal type: year-month-day hour-minute-second-millisecond
class DateComponents {
public:
DateComponents()
: m_millisecond(0)
, m_second(0)
, m_minute(0)
, m_hour(0)
, m_monthDay(0)
, m_month(0)
, m_year(0)
, m_week(0)
, m_type(Invalid)
{
}
int millisecond() const { return m_millisecond; }
int second() const { return m_second; }
int minute() const { return m_minute; }
int hour() const { return m_hour; }
int monthDay() const { return m_monthDay; }
int month() const { return m_month; }
int fullYear() const { return m_year; }
int week() const { return m_week; }
enum SecondFormat {
None, // Suppress the second part and the millisecond part if they are 0.
Second, // Always show the second part, and suppress the millisecond part if it is 0.
Millisecond // Always show the second part and the millisecond part.
};
// Returns an ISO 8601 representation for this instance.
// The format argument is valid for DateTime, DateTimeLocal, and Time types.
String toString(SecondFormat format = None) const;
// parse*() and setMillisecondsSince*() functions are initializers for an
// DateComponents instance. If these functions return false, the instance
// might be invalid.
// The following six functions parse the input 'src' whose length is
// 'length', and updates some fields of this instance. The parsing starts at
// src[start] and examines characters before src[length].
// 'src' must be non-null. The 'src' string doesn't need to be
// null-terminated.
// The functions return true if the parsing succeeds, and set 'end' to the
// next index after the last consumed. Extra leading characters cause parse
// failures, and the trailing extra characters don't cause parse failures.
// Sets year and month.
bool parseMonth(const UChar* src, unsigned length, unsigned start, unsigned& end);
// Sets year, month and monthDay.
bool parseDate(const UChar* src, unsigned length, unsigned start, unsigned& end);
// Sets year and week.
bool parseWeek(const UChar* src, unsigned length, unsigned start, unsigned& end);
// Sets hour, minute, second and millisecond.
bool parseTime(const UChar* src, unsigned length, unsigned start, unsigned& end);
// Sets year, month, monthDay, hour, minute, second and millisecond.
bool parseDateTimeLocal(const UChar* src, unsigned length, unsigned start, unsigned& end);
// Sets year, month, monthDay, hour, minute, second and millisecond, and adjusts timezone.
bool parseDateTime(const UChar* src, unsigned length, unsigned start, unsigned& end);
// The following setMillisecondsSinceEpochFor*() functions take
// the number of milliseconds since 1970-01-01 00:00:00.000 UTC as
// the argument, and update all fields for the corresponding
// DateComponents type. The functions return true if it succeeds, and
// false if they fail.
// For Date type. Updates m_year, m_month and m_monthDay.
bool setMillisecondsSinceEpochForDate(double ms);
// For DateTime type. Updates m_year, m_month, m_monthDay, m_hour, m_minute, m_second and m_millisecond.
bool setMillisecondsSinceEpochForDateTime(double ms);
// For DateTimeLocal type. Updates m_year, m_month, m_monthDay, m_hour, m_minute, m_second and m_millisecond.
bool setMillisecondsSinceEpochForDateTimeLocal(double ms);
// For Month type. Updates m_year and m_month.
bool setMillisecondsSinceEpochForMonth(double ms);
// For Week type. Updates m_year and m_week.
bool setMillisecondsSinceEpochForWeek(double ms);
// For Time type. Updates m_hour, m_minute, m_second and m_millisecond.
bool setMillisecondsSinceMidnight(double ms);
// Another initializer for Month type. Updates m_year and m_month.
bool setMonthsSinceEpoch(double months);
// Returns the number of milliseconds from 1970-01-01 00:00:00 UTC.
// For a DateComponents initialized with parseDateTimeLocal(),
// millisecondsSinceEpoch() returns a value for UTC timezone.
double millisecondsSinceEpoch() const;
// Returns the number of months from 1970-01.
// Do not call this for types other than Month.
double monthsSinceEpoch() const;
static inline double invalidMilliseconds() { return std::numeric_limits<double>::quiet_NaN(); }
// Minimum and maxmimum limits for setMillisecondsSince*(),
// setMonthsSinceEpoch(), millisecondsSinceEpoch(), and monthsSinceEpoch().
static inline double minimumDate() { return -62135596800000.0; } // 0001-01-01T00:00Z
static inline double minimumDateTime() { return -62135596800000.0; } // ditto.
static inline double minimumMonth() { return (1 - 1970) * 12.0 + 1 - 1; } // 0001-01
static inline double minimumTime() { return 0; } // 00:00:00.000
static inline double minimumWeek() { return -62135596800000.0; } // 0001-01-01, the first Monday of 0001.
static inline double maximumDate() { return 8640000000000000.0; } // 275760-09-13T00:00Z
static inline double maximumDateTime() { return 8640000000000000.0; } // ditto.
static inline double maximumMonth() { return (275760 - 1970) * 12.0 + 9 - 1; } // 275760-09
static inline double maximumTime() { return 86399999; } // 23:59:59.999
static inline double maximumWeek() { return 8639999568000000.0; } // 275760-09-08, the Monday of the week including 275760-09-13.
private:
// Returns the maximum week number in this DateComponents's year.
// The result is either of 52 and 53.
int maxWeekNumberInYear() const;
bool parseYear(const UChar* src, unsigned length, unsigned start, unsigned& end);
bool addDay(int);
bool addMinute(int);
bool parseTimeZone(const UChar* src, unsigned length, unsigned start, unsigned& end);
// Helper for millisecondsSinceEpoch().
double millisecondsSinceEpochForTime() const;
// Helpers for setMillisecondsSinceEpochFor*().
bool setMillisecondsSinceEpochForDateInternal(double ms);
void setMillisecondsSinceMidnightInternal(double ms);
// Helper for toString().
String toStringForTime(SecondFormat) const;
// m_weekDay values
enum {
Sunday = 0,
Monday,
Tuesday,
Wednesday,
Thursday,
Friday,
Saturday,
};
int m_millisecond; // 0 - 999
int m_second;
int m_minute;
int m_hour;
int m_monthDay; // 1 - 31
int m_month; // 0:January - 11:December
int m_year; // 1582 -
int m_week; // 1 - 53
enum Type {
Invalid,
Date,
DateTime,
DateTimeLocal,
Month,
Time,
Week,
};
Type m_type;
};
} // namespace WebCore
#endif // DateComponents_h
|
