source: Include/Classes/System/DateTime.ab@ 263

Last change on this file since 263 was 263, checked in by OverTaker, 18 years ago

#116のバグを修整。
File size: 13.7 KB
Line 
1' Classes/System/DateTime.ab
2
3Class DateTime
4 m_Date As Int64
5Public
6 Static MaxValue = 3162240000000000000 As Int64 'Const TicksPerDay*366*10000
7 Static MinValue = 316224000000000 As Int64 'Const TicksPerDay*366
8
9 Sub DateTime()
10 initialize(MinValue, DateTimeKind.Unspecified)
11 End Sub
12
13 Sub DateTime(ticks As Int64)
14 initialize(ticks, DateTimeKind.Unspecified)
15 End Sub
16
17 Sub DateTime(ticks As Int64, kind As DateTimeKind)
18 initialize(ticks, kind)
19 End Sub
20
21 Sub DateTime(year As Long, month As Long, day As Long)
22 initialize(year, month, day, 0, 0, 0, 0, DateTimeKind.Unspecified)
23 End Sub
24
25 Sub DateTime(year As Long, month As Long, day As Long, kind As DateTimeKind)
26 initialize(year, month, day, 0, 0, 0, 0, kind)
27 End Sub
28
29 Sub DateTime(year As Long, month As Long, day As Long, hour As Long, minute As Long, second As Long)
30 initialize(year, month, day, hour, minute, second, 0, DateTimeKind.Unspecified)
31 End Sub
32
33 Sub DateTime(year As Long, month As Long, day As Long, hour As Long, minute As Long, second As Long, kind As DateTimeKind)
34 initialize(year, month, day, hour, minute, second, 0, kind)
35 End Sub
36
37 Sub DateTime(year As Long, month As Long, day As Long, hour As Long, minute As Long, second As Long, millisecond As Long)
38 initialize(year, month, day, hour, minute, second, millisecond, DateTimeKind.Unspecified)
39 End Sub
40
41 Sub DateTime(year As Long, month As Long, day As Long, hour As Long, minute As Long, second As Long, millisecond As Long, kind As DateTimeKind)
42 initialize(year, month, day, hour, minute, second, millisecond, kind)
43 End Sub
44
45 Sub DateTime(ByRef time As SYSTEMTIME)
46 initialize(time.wYear, time.wMonth, time.wDay, time.wHour, time.wMinute, time.wSecond, time.wMilliseconds, DateTimeKind.Unspecified)
47 End Sub
48
49 Sub DateTime(ByRef time As SYSTEMTIME, kind As DateTimeKind)
50 initialize(time.wYear, time.wMonth, time.wDay, time.wHour, time.wMinute, time.wSecond, time.wMilliseconds, kind)
51 End Sub
52
53 'Copy Constructor
54 Sub DateTime(ByRef dateTime As DateTime)
55 This.m_Date = dateTime.m_Date
56 End Sub
57
58 Sub ~DateTime()
59 End Sub
60
61 Function Operator + (ByRef value As TimeSpan) As DateTime
62 Return New DateTime(Ticks + value.Ticks)
63 End Function
64
65 Function Operator - (ByRef value As DateTime) As TimeSpan
66 Return TimeSpan.FromTicks(Ticks - value.Ticks)
67 End Function
68
69 Function Operator - (ByRef value As TimeSpan) As DateTime
70 Return New DateTime(Ticks - value.Ticks)
71 End Function
72
73 Function Operator == (ByRef value As DateTime) As Boolean
74 Return Equals(value)
75 End Function
76
77 Function Operator <> (ByRef value As DateTime) As Boolean
78 Return Not Equals(value)
79 End Function
80
81 Function Operator > (ByRef value As DateTime) As Boolean
82 If DateTime.Compare(This, value) > 0 Then
83 Return True
84 Else
85 Return False
86 End If
87 End Function
88
89 Function Operator < (ByRef value As DateTime) As Boolean
90 If DateTime.Compare(This, value) < 0 Then
91 Return True
92 Else
93 Return False
94 End If
95 End Function
96
97 Function Operator >= (ByRef value As DateTime) As Boolean
98 If DateTime.Compare(This, value) => 0 Then
99 Return True
100 Else
101 Return False
102 End If
103 End Function
104
105 Function Operator <= (ByRef value As DateTime) As Boolean
106 If DateTime.Compare(This, value) <= 0 Then
107 Return True
108 Else
109 Return False
110 End If
111 End Function
112
113 'Public Properties
114 Function Ticks() As Int64
115 Return (m_Date And &H3FFFFFFFFFFFFFFF)
116 End Function
117
118 Function Millisecond() As Long
119 Return (Ticks \ TimeSpan.TicksPerMillisecond Mod 1000) As Long
120 End Function
121
122 Function Second() As Long
123 Return (Ticks \ TimeSpan.TicksPerSecond Mod 60) As Long
124 End Function
125
126 Function Minute() As Long
127 Return (Ticks \ TimeSpan.TicksPerMinute Mod 60) As Long
128 End Function
129
130 Function Hour() As Long
131 Return (Ticks \ TimeSpan.TicksPerHour Mod 24) As Long
132 End Function
133
134 Function Day() As Long
135 Return DayOfYear - totalDaysOfMonth(Year, Month - 1)
136 End Function
137
138 Function Month() As Long
139 Dim year = Year As Long
140 Dim day = DayOfYear As Long
141 Dim i = 1 As Long
142 While day > totalDaysOfMonth(year, i)
143 i++
144 Wend
145 Return i
146 End Function
147
148 Function Year() As Long
149 Dim day = (Ticks \ TimeSpan.TicksPerDay) As Long
150 Dim year = Int((day + day \ 36524 - day \ 146097) / 365.25) + 1 As Long
151 If day - yearToDay(year - 1) + 1 = 366 Then
152 Return year + 1
153 Else
154 Return year
155 End If
156 End Function
157
158 Function DayOfWeek() As Long 'As DayOfWeek
159 Return ((Ticks \ TimeSpan.TicksPerDay) Mod 7) As Long + 1
160 End Function
161
162 Function Kind() As DateTimeKind
163 Return kindFromBinary(m_Date)
164 End Function
165
166 Function DayOfYear() As Long
167 Return ((Ticks \ TimeSpan.TicksPerDay) - yearToDay(Year) + 1) As Long
168 End Function
169
170 Function Date() As DateTime
171 Return New DateTime(Year, Month, Day, Kind)
172 End Function
173
174 Static Function Now() As DateTime
175 Dim time As SYSTEMTIME
176 GetLocalTime(time)
177 Return New DateTime(time, DateTimeKind.Local)
178 End Function
179
180 Static Function ToDay() As DateTime
181 Dim time As SYSTEMTIME
182 GetLocalTime(time)
183 Return New DateTime(time.wYear, time.wMonth, time.wDay, DateTimeKind.Local)
184 End Function
185
186 Static Function UtcNow() As DateTime
187 Dim time As SYSTEMTIME
188 GetSystemTime(time)
189 Return New DateTime(time, DateTimeKind.Utc)
190 End Function
191
192 'Public Methods
193 Static Function Compare(ByRef t1 As DateTime, ByRef t2 As DateTime) As Int64
194 Return t1.Ticks - t2.Ticks
195 End Function
196
197 Function Equals(ByRef value As DateTime) As Boolean
198 If value.m_Date = m_Date Then
199 Return True
200 Else
201 Return False
202 End If
203 End Function
204
205 Static Function Equals(ByRef t1 As DateTime, ByRef t2 As DateTime) As Boolean
206 If t1.m_Date = t2.m_Date Then
207 Return True
208 Else
209 Return False
210 End If
211 End Function
212
213 Override Function GetHashCode() As Long
214 Return HIDWORD(m_Date) Xor LODWORD(m_Date)
215 End Function
216
217 Function Add(ByRef value As TimeSpan) As DateTime
218 Return This + value
219 End Function
220
221 Function AddTicks(value As Int64) As DateTime
222 Return New DateTime(Ticks + value, Kind )
223 End Function
224
225 Function AddMilliseconds(value As Double) As DateTime
226 Return AddTicks((value * TimeSpan.TicksPerMillisecond) As Int64)
227 End Function
228
229 Function AddSeconds(value As Double) As DateTime
230 Return AddTicks((value * TimeSpan.TicksPerSecond) As Int64)
231 End Function
232
233 Function AddMinutes(value As Double) As DateTime
234 Return AddTicks((value * TimeSpan.TicksPerMinute) As Int64)
235 End Function
236
237 Function AddHours(value As Double) As DateTime
238 Return AddTicks((value * TimeSpan.TicksPerHour) As Int64)
239 End Function
240
241 Function AddDays(value As Double) As DateTime
242 Return AddTicks((value * TimeSpan.TicksPerDay) As Int64)
243 End Function
244
245 Function AddYears(value As Double) As DateTime
246 Dim date = New DateTime(Year + Int(value), Month, Day, Hour, Minute, Second, Millisecond, Kind)
247 Dim ticks = Ticks _
248 - (yearToDay(Year) + totalDaysOfMonth(Year, Month - 1) + Day - 1) * TimeSpan.TicksPerDay _
249 - Hour * TimeSpan.TicksPerHour _
250 - Minute * TimeSpan.TicksPerMinute _
251 - Second * TimeSpan.TicksPerSecond _
252 - Millisecond * TimeSpan.TicksPerMillisecond As Int64
253 If IsLeapYear(Year + Int(value)) Then
254 ticks += (value - Int(value)) * 366 * TimeSpan.TicksPerDay
255 Else
256 ticks += (value - Int(value)) * 365 * TimeSpan.TicksPerDay
257 End If
258 Return date.AddTicks(ticks)
259 End Function
260
261 Function Subtract(ByRef value As DateTime) As TimeSpan
262 Return New DateTime(This - value)
263 End Function
264
265 Function Subtract(ByRef value As TimeSpan) As DateTime
266 Return New DateTime(This - value)
267 End Function
268
269 Static Function DaysInMonth(year As Long, month As Long) As Long
270 If year < 1 Or year > 9999 Or month < 1 Or month > 12 Then
271 'ArgumentOutOfRangeException
272 debug
273 End If
274
275 If IsLeapYear(year) And month = 2 Then
276 Return 29
277 Else
278 Dim daysInMonth[11] = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31] As Byte
279 Return daysInMonth[month - 1]
280 End If
281 End Function
282
283 Static Function IsLeapYear(year As Long) As Boolean
284 If (year Mod 400) = 0 Then Return True
285 If (year Mod 100) = 0 Then Return False
286 If (year Mod 4) = 0 Then Return True
287 Return False
288 End Function
289
290 Function GetDateTimeFormats() As String
291 Dim time = getSystemTime() 'As SYSTEMTIME を記述すると内部エラーが発生
292 Dim dateFormatSize = GetDateFormat(LOCALE_USER_DEFAULT, 0, time, NULL, NULL, 0)
293 Dim timeFormatSize = GetTimeFormat(LOCALE_USER_DEFAULT, 0, time, NULL, NULL, 0)
294 Dim dateTimeFormats = malloc(dateFormatSize + timeFormatSize) As PTSTR
295 GetDateFormat(LOCALE_USER_DEFAULT, 0, time, NULL, dateTimeFormats, dateFormatSize)
296 dateTimeFormats[dateFormatSize - 1] = Asc(" ")
297 GetTimeFormat(LOCALE_USER_DEFAULT, 0, time, NULL, dateTimeFormats + dateFormatSize, timeFormatSize)
298
299 Return New String(dateTimeFormats)
300 End Function
301
302 Function GetDateTimeFormats(format As *TCHAR) As String
303 Dim time = getSystemTime() 'As SYSTEMTIME を記述すると内部エラーが発生
304 Dim dateFormatSize = GetDateFormat(LOCALE_USER_DEFAULT, 0, time, format, NULL, 0)
305 Dim dateFormats = malloc(dateFormatSize) As PTSTR
306 GetDateFormat(LOCALE_USER_DEFAULT, 0, time, format, dateFormats, dateFormatSize)
307
308 Dim dateTimeFormatSize = GetTimeFormat(LOCALE_USER_DEFAULT, 0, time, dateFormats, NULL, 0)
309 Dim dateTimeFormats = malloc(dateTimeFormatSize) As PTSTR
310 GetTimeFormat(LOCALE_USER_DEFAULT, 0, time, dateFormats, dateTimeFormats, dateTimeFormatSize)
311
312 Return New String(dateTimeFormats)
313 End Function
314
315 Static Function FromBinary(date As Int64) As DateTime
316 Return New DateTime((date And &H3FFFFFFFFFFFFFFF), kindFromBinary(date))
317 End Function
318
319 Function ToBinary() As Int64
320 Return m_Date
321 End Function
322
323 Static Function FromFileTime(ByRef fileTime As FILETIME) As DateTime
324 Dim localTime As FILETIME
325 Dim time As SYSTEMTIME
326 FileTimeToLocalFileTime(fileTime, localTime)
327 FileTimeToSystemTime(localTime, time)
328 Return New DateTime(time, DateTimeKind.Local)
329 End Function
330
331 Function ToFileTime() As FILETIME
332 Dim time = getSystemTime() 'As SYSTEMTIME を記述すると内部エラーが発生 rev.207
333 Dim fileTime As FILETIME
334 SystemTimeToFileTime(time, fileTime)
335 Return fileTime
336 End Function
337
338 Static Function FromFileTimeUtc(ByRef fileTime As FILETIME) As DateTime
339 Dim time As SYSTEMTIME
340 FileTimeToSystemTime(fileTime, time)
341 Return New DateTime(time, DateTimeKind.Utc)
342 End Function
343
344 Function ToFileTimeUtc() As FILETIME
345 Dim fileTime = ToFileTime() 'As FILETIME を記述すると内部エラー rev.207
346 If Kind = DateTimeKind.Utc Then
347 Return fileTime
348 Else
349 Dim utcTime As FILETIME
350 LocalFileTimeToFileTime(fileTime, utcTime)
351 Return utcTime
352 End If
353 End Function
354
355 Function ToLocalTime() As DateTime
356 If Kind = DateTimeKind.Local Then
357 Return New DateTime(This)
358 Else
359 Dim fileTime = ToFileTime() '直接入れると計算できなくなります。 rev.207
360 Return DateTime.FromFileTime(fileTime)
361 End If
362 End Function
363
364 Override Function ToString() As String
365 Return GetDateTimeFormats()
366 End Function
367
368 Function ToUniversalTime() As DateTime
369 If Kind = DateTimeKind.Utc Then
370 Return New DateTime(m_Date)
371 Else
372 Dim fileTime = ToFileTimeUtc() '直接入れると計算できなくなります。 rev.207
373 Return DateTime.FromFileTimeUtc(fileTime)
374 End If
375 End Function
376
377Private
378 Sub initialize(ticks As Int64, kind As DateTimeKind)
379 Kind = kind
380 Ticks = ticks
381 End Sub
382
383 Sub initialize(year As Long, month As Long, day As Long, hour As Long, minute As Long, second As Long, millisecond As Long, kind As DateTimeKind)
384 If month < 1 Or month > 12 _
385 Or day < 1 Or day > DaysInMonth(year, month) _
386 Or hour < 0 Or hour => 24 _
387 Or minute < 0 Or minute => 60 _
388 Or second < 0 Or second => 60 _
389 Or millisecond < 0 Or millisecond => 1000 Then
390 debug 'ArgumentOutOfRangeException
391 End If
392
393 initialize(
394 yearToDay(year) * TimeSpan.TicksPerDay _
395 + totalDaysOfMonth(year, month - 1) * TimeSpan.TicksPerDay _
396 + (day - 1) * TimeSpan.TicksPerDay _
397 + hour * TimeSpan.TicksPerHour _
398 + minute * TimeSpan.TicksPerMinute _
399 + second * TimeSpan.TicksPerSecond _
400 + millisecond * TimeSpan.TicksPerMillisecond,
401 kind
402 )
403 End Sub
404
405 Sub Ticks(value As Int64)
406 If value < MinValue Or value > MaxValue Then
407 debug 'ArgumentOutOfRangeException
408 End If
409
410 Dim temp = Kind As DateTimeKind
411 m_Date = value
412 Kind = temp
413 End Sub
414
415 Sub Kind(kind As DateTimeKind)
416 Dim temp As Int64
417 temp = kind
418 temp = (temp << 62) And &HC000000000000000
419 m_Date = (m_Date And &H3FFFFFFFFFFFFFFF) Or temp
420 End Sub
421
422 Static Function kindFromBinary(date As Int64) As DateTimeKind
423 date = (date >> 62) And &H03
424 If date = &H01 Then
425 Return DateTimeKind.Local
426 ElseIf date = &H02 Then
427 Return DateTimeKind.Unspecified
428 ElseIf date = &H03 Then
429 Return DateTimeKind.Utc
430 End If
431
432 ' ここにはこないはず
433 debug
434 End Function
435
436 Function getSystemTime() As SYSTEMTIME
437 Dim time As SYSTEMTIME
438 With time
439 .wYear = Year As Word
440 .wMonth = Month As Word
441 .wDayOfWeek = DayOfWeek As Word
442 .wDay = Day As Word
443 .wHour = Hour As Word
444 .wMinute = Minute As Word
445 .wSecond = Second As Word
446 .wMilliseconds = Millisecond As Word
447 End With
448 Return time
449 End Function
450
451 Static Function yearToDay(year As Long) As Long
452 year--
453 Return (Int(year * 365.25) - Int(year * 0.01) + Int(year * 0.0025))
454 End Function
455
456 Static Function totalDaysOfMonth(year As Long, month As Long) As Long
457 Dim days As Long
458 Dim i As Long
459 For i = 1 To month
460 days += DaysInMonth(year, i)
461 Next
462 Return days
463 End Function
464End Class
465
466Enum DateTimeKind
467 Local
468 Unspecified
469 Utc
470End Enum
471
472Enum DayOfWeek
473 Sunday = 0
474 Monday
475 Tuesday
476 Wednesday
477 Thursday
478 Friday
479 Saturday
480End Enum
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