// Token: 0x06001120 RID: 4384 RVA: 0x00046F90 File Offset: 0x00045190
private static TimeZoneOffsets.TimeZoneOffsetTable GetTableFromCache(int startYear, int endYear)
{
TimeZoneOffsets.TimeZoneOffsetTable timeZoneOffsetTable = null;
lock (TimeZoneOffsets.cacheMutex)
{
int i = 0;
while (i < TimeZoneOffsets.tableCache.Count)
{
timeZoneOffsetTable = TimeZoneOffsets.tableCache[i];
if (timeZoneOffsetTable.StartYear == startYear && timeZoneOffsetTable.EndYear == endYear)
{
if (i > 0)
{
TimeZoneOffsets.tableCache.RemoveAt(i);
TimeZoneOffsets.tableCache.Insert(0, timeZoneOffsetTable);
break;
}
break;
}
else
{
timeZoneOffsetTable = null;
i++;
}
}
}
return(timeZoneOffsetTable);
}
// Token: 0x0600111F RID: 4383 RVA: 0x00046EBC File Offset: 0x000450BC
public static TimeZoneOffset[] GetTheTimeZoneOffsets(ExDateTime startTime, ExDateTime endTime, string timeZoneId = null, ExPerformanceCounter performanceCounter = null)
{
if (endTime < startTime)
{
throw new ArgumentException("End time must be greater than start time");
}
if (startTime.AddYears(100) < endTime)
{
throw new ArgumentException("Time range is too large: " + (endTime - startTime));
}
TimeZoneOffsets.TimeZoneOffsetTable timeZoneOffsetTable = TimeZoneOffsets.GetTableFromCache(startTime.Year, endTime.Year);
if (timeZoneOffsetTable == null)
{
timeZoneOffsetTable = TimeZoneOffsets.BuildCache(startTime.Year, endTime.Year, performanceCounter);
TimeZoneOffsets.AddTableToCache(timeZoneOffsetTable);
}
new List <TimeZoneOffset>();
if (timeZoneId != null)
{
foreach (TimeZoneOffset timeZoneOffset in timeZoneOffsetTable.TimeZoneOffsets)
{
if (timeZoneOffset.TimeZoneId == timeZoneId)
{
return(new TimeZoneOffset[]
{
timeZoneOffset
});
}
}
return(null);
}
return(timeZoneOffsetTable.TimeZoneOffsets);
}
// Token: 0x06001122 RID: 4386 RVA: 0x000470CC File Offset: 0x000452CC
private static TimeZoneOffsets.TimeZoneOffsetTable BuildCache(int startYear, int endYear, ExPerformanceCounter performanceCounter)
{
if (performanceCounter != null)
{
performanceCounter.Increment();
}
TimeZoneOffsets.TimeZoneOffsetTable timeZoneOffsetTable = new TimeZoneOffsets.TimeZoneOffsetTable();
timeZoneOffsetTable.StartYear = startYear;
timeZoneOffsetTable.EndYear = endYear;
List <TimeZoneOffset> list = new List <TimeZoneOffset>();
foreach (ExTimeZone exTimeZone in ExTimeZoneEnumerator.Instance)
{
TimeZoneOffset timeZoneOffset = new TimeZoneOffset();
timeZoneOffset.TimeZoneId = exTimeZone.Id;
List <TimeZoneRange> list2 = new List <TimeZoneRange>();
ExDateTime t = new ExDateTime(ExTimeZone.UtcTimeZone, endYear + 1, 1, 1);
ExDateTime exDateTime = new ExDateTime(ExTimeZone.UtcTimeZone, startYear, 1, 1);
for (;;)
{
int num = (int)exTimeZone.ConvertDateTime(exDateTime).Bias.TotalMinutes;
list2.Add(new TimeZoneRange
{
UtcTime = exDateTime,
Offset = num
});
TimeSpan timeSpan = TimeSpan.Zero;
TimeSpan timeSpan2 = TimeSpan.Zero;
while (exDateTime + timeSpan < t && exTimeZone.ConvertDateTime(exDateTime + timeSpan2).Bias.TotalMinutes == (double)num)
{
timeSpan = timeSpan2;
timeSpan2 = timeSpan2.Add(TimeSpan.FromDays(7.0));
}
if (exDateTime + timeSpan >= t)
{
break;
}
while ((timeSpan2 - timeSpan).TotalMilliseconds > 1.0)
{
TimeSpan timeSpan3 = timeSpan.Add(TimeSpan.FromMilliseconds((timeSpan2.TotalMilliseconds - timeSpan.TotalMilliseconds) / 2.0));
if (exTimeZone.ConvertDateTime(exDateTime + timeSpan3).Bias.TotalMinutes == (double)num)
{
timeSpan = timeSpan3;
}
else
{
timeSpan2 = timeSpan3;
}
}
exDateTime += timeSpan2;
}
timeZoneOffset.OffsetRanges = list2.ToArray();
list.Add(timeZoneOffset);
}
timeZoneOffsetTable.TimeZoneOffsets = list.ToArray();
return(timeZoneOffsetTable);
}
// Token: 0x06001121 RID: 4385 RVA: 0x00047020 File Offset: 0x00045220
private static void AddTableToCache(TimeZoneOffsets.TimeZoneOffsetTable newTable)
{
lock (TimeZoneOffsets.cacheMutex)
{
for (int i = 0; i < TimeZoneOffsets.tableCache.Count; i++)
{
TimeZoneOffsets.TimeZoneOffsetTable timeZoneOffsetTable = TimeZoneOffsets.tableCache[i];
if (timeZoneOffsetTable.StartYear == newTable.StartYear && timeZoneOffsetTable.EndYear == newTable.EndYear)
{
return;
}
}
if (TimeZoneOffsets.tableCache.Count >= 5)
{
TimeZoneOffsets.tableCache.RemoveRange(4, TimeZoneOffsets.tableCache.Count - 5 + 1);
}
TimeZoneOffsets.tableCache.Insert(0, newTable);
}
}