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
|
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Diagnostics;
using Internal.Runtime.Augments;
namespace System.Globalization
{
public partial class JapaneseCalendar : Calendar
{
private static EraInfo[] GetJapaneseEras()
{
int erasCount = WinRTInterop.Callbacks.GetJapaneseEraCount();
if (erasCount < 4)
{
return null;
}
EraInfo[] eras = new EraInfo[erasCount];
int lastMaxYear = GregorianCalendar.MaxYear;
for (int i = erasCount; i > 0; i--)
{
DateTimeOffset dateOffset;
string eraName;
string abbreviatedEraName;
if (!GetJapaneseEraInfo(i, out dateOffset, out eraName, out abbreviatedEraName))
{
return null;
}
DateTime dt = new DateTime(dateOffset.Ticks);
eras[erasCount - i] = new EraInfo(i, dt.Year, dt.Month, dt.Day, dt.Year - 1, 1, lastMaxYear - dt.Year + 1,
eraName, abbreviatedEraName, GetJapaneseEnglishEraName(i)); // era #4 start year/month/day, yearOffset, minEraYear
lastMaxYear = dt.Year;
}
return eras;
}
// PAL Layer ends here
private static string[] JapaneseErasEnglishNames = new String[] { "M", "T", "S", "H" };
private static string GetJapaneseEnglishEraName(int era)
{
Debug.Assert(era > 0);
return era <= JapaneseErasEnglishNames.Length ? JapaneseErasEnglishNames[era - 1] : " ";
}
private static bool GetJapaneseEraInfo(int era, out DateTimeOffset dateOffset, out string eraName, out string abbreviatedEraName)
{
return WinRTInterop.Callbacks.GetJapaneseEraInfo(era, out dateOffset, out eraName, out abbreviatedEraName);
}
}
}
|
