pos/is4c-nf/scale-drivers/drivers/NewMagellan/Newtonsoft.Json/Utilities/DateTimeUtils.cs
#region License
// Copyright (c) 2007 James Newton-King
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
#endregion
using System;
using System.IO;
using System.Xml;
using System.Globalization;
namespace Newtonsoft.Json.Utilities
{
internal static class DateTimeUtils
{
internal static readonly long InitialJavaScriptDateTicks = 621355968000000000;
private const int DaysPer100Years = 36524;
private const int DaysPer400Years = 146097;
private const int DaysPer4Years = 1461;
private const int DaysPerYear = 365;
private const long TicksPerDay = 864000000000L;
private static readonly int[] DaysToMonth365;
private static readonly int[] DaysToMonth366;
static DateTimeUtils()
{
DaysToMonth365 = new[] { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 };
DaysToMonth366 = new[] { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 };
}
public static TimeSpan GetUtcOffset(this DateTime d)
{
#if NET20
return TimeZone.CurrentTimeZone.GetUtcOffset(d);
#else
return TimeZoneInfo.Local.GetUtcOffset(d);
#endif
}
#if !(NETFX_CORE || PORTABLE40 || PORTABLE)
public static XmlDateTimeSerializationMode ToSerializationMode(DateTimeKind kind)
{
switch (kind)
{
case DateTimeKind.Local:
return XmlDateTimeSerializationMode.Local;
case DateTimeKind.Unspecified:
return XmlDateTimeSerializationMode.Unspecified;
case DateTimeKind.Utc:
return XmlDateTimeSerializationMode.Utc;
default:
throw MiscellaneousUtils.CreateArgumentOutOfRangeException("kind", kind, "Unexpected DateTimeKind value.");
}
}
#endif
internal static DateTime EnsureDateTime(DateTime value, DateTimeZoneHandling timeZone)
{
switch (timeZone)
{
case DateTimeZoneHandling.Local:
value = SwitchToLocalTime(value);
break;
case DateTimeZoneHandling.Utc:
value = SwitchToUtcTime(value);
break;
case DateTimeZoneHandling.Unspecified:
value = new DateTime(value.Ticks, DateTimeKind.Unspecified);
break;
case DateTimeZoneHandling.RoundtripKind:
break;
default:
throw new ArgumentException("Invalid date time handling value.");
}
return value;
}
private static DateTime SwitchToLocalTime(DateTime value)
{
switch (value.Kind)
{
case DateTimeKind.Unspecified:
return new DateTime(value.Ticks, DateTimeKind.Local);
case DateTimeKind.Utc:
return value.ToLocalTime();
case DateTimeKind.Local:
return value;
}
return value;
}
private static DateTime SwitchToUtcTime(DateTime value)
{
switch (value.Kind)
{
case DateTimeKind.Unspecified:
return new DateTime(value.Ticks, DateTimeKind.Utc);
case DateTimeKind.Utc:
return value;
case DateTimeKind.Local:
return value.ToUniversalTime();
}
return value;
}
private static long ToUniversalTicks(DateTime dateTime)
{
if (dateTime.Kind == DateTimeKind.Utc)
return dateTime.Ticks;
return ToUniversalTicks(dateTime, dateTime.GetUtcOffset());
}
private static long ToUniversalTicks(DateTime dateTime, TimeSpan offset)
{
// special case min and max value
// they never have a timezone appended to avoid issues
if (dateTime.Kind == DateTimeKind.Utc || dateTime == DateTime.MaxValue || dateTime == DateTime.MinValue)
return dateTime.Ticks;
long ticks = dateTime.Ticks - offset.Ticks;
if (ticks > 3155378975999999999L)
return 3155378975999999999L;
if (ticks < 0L)
return 0L;
return ticks;
}
internal static long ConvertDateTimeToJavaScriptTicks(DateTime dateTime, TimeSpan offset)
{
long universialTicks = ToUniversalTicks(dateTime, offset);
return UniversialTicksToJavaScriptTicks(universialTicks);
}
internal static long ConvertDateTimeToJavaScriptTicks(DateTime dateTime)
{
return ConvertDateTimeToJavaScriptTicks(dateTime, true);
}
internal static long ConvertDateTimeToJavaScriptTicks(DateTime dateTime, bool convertToUtc)
{
long ticks = (convertToUtc) ? ToUniversalTicks(dateTime) : dateTime.Ticks;
return UniversialTicksToJavaScriptTicks(ticks);
}
private static long UniversialTicksToJavaScriptTicks(long universialTicks)
{
long javaScriptTicks = (universialTicks - InitialJavaScriptDateTicks) / 10000;
return javaScriptTicks;
}
internal static DateTime ConvertJavaScriptTicksToDateTime(long javaScriptTicks)
{
DateTime dateTime = new DateTime((javaScriptTicks * 10000) + InitialJavaScriptDateTicks, DateTimeKind.Utc);
return dateTime;
}
#region Parse
internal static bool TryParseDateIso(string text, DateParseHandling dateParseHandling, DateTimeZoneHandling dateTimeZoneHandling, out object dt)
{
DateTimeParser dateTimeParser = new DateTimeParser();
if (!dateTimeParser.Parse(text))
{
dt = null;
return false;
}
DateTime d = new DateTime(dateTimeParser.Year, dateTimeParser.Month, dateTimeParser.Day, dateTimeParser.Hour, dateTimeParser.Minute, dateTimeParser.Second);
d = d.AddTicks(dateTimeParser.Fraction);
#if !NET20
if (dateParseHandling == DateParseHandling.DateTimeOffset)
{
TimeSpan offset;
switch (dateTimeParser.Zone)
{
case ParserTimeZone.Utc:
offset = new TimeSpan(0L);
break;
case ParserTimeZone.LocalWestOfUtc:
offset = new TimeSpan(-dateTimeParser.ZoneHour, -dateTimeParser.ZoneMinute, 0);
break;
case ParserTimeZone.LocalEastOfUtc:
offset = new TimeSpan(dateTimeParser.ZoneHour, dateTimeParser.ZoneMinute, 0);
break;
default:
offset = TimeZoneInfo.Local.GetUtcOffset(d);
break;
}
long ticks = d.Ticks - offset.Ticks;
if (ticks < 0 || ticks > 3155378975999999999)
{
dt = null;
return false;
}
dt = new DateTimeOffset(d, offset);
return true;
}
else
#endif
{
long ticks;
switch (dateTimeParser.Zone)
{
case ParserTimeZone.Utc:
d = new DateTime(d.Ticks, DateTimeKind.Utc);
break;
case ParserTimeZone.LocalWestOfUtc:
{
TimeSpan offset = new TimeSpan(dateTimeParser.ZoneHour, dateTimeParser.ZoneMinute, 0);
ticks = d.Ticks + offset.Ticks;
if (ticks <= DateTime.MaxValue.Ticks)
{
d = new DateTime(ticks, DateTimeKind.Utc).ToLocalTime();
}
else
{
ticks += d.GetUtcOffset().Ticks;
if (ticks > DateTime.MaxValue.Ticks)
ticks = DateTime.MaxValue.Ticks;
d = new DateTime(ticks, DateTimeKind.Local);
}
break;
}
case ParserTimeZone.LocalEastOfUtc:
{
TimeSpan offset = new TimeSpan(dateTimeParser.ZoneHour, dateTimeParser.ZoneMinute, 0);
ticks = d.Ticks - offset.Ticks;
if (ticks >= DateTime.MinValue.Ticks)
{
d = new DateTime(ticks, DateTimeKind.Utc).ToLocalTime();
}
else
{
ticks += d.GetUtcOffset().Ticks;
if (ticks < DateTime.MinValue.Ticks)
ticks = DateTime.MinValue.Ticks;
d = new DateTime(ticks, DateTimeKind.Local);
}
break;
}
}
dt = EnsureDateTime(d, dateTimeZoneHandling);
return true;
}
}
internal static bool TryParseDateTime(string s, DateParseHandling dateParseHandling, DateTimeZoneHandling dateTimeZoneHandling, string dateFormatString, CultureInfo culture, out object dt)
{
if (s.Length > 0)
{
if (s[0] == '/')
{
if (s.StartsWith("/Date(", StringComparison.Ordinal) && s.EndsWith(")/", StringComparison.Ordinal))
{
if (TryParseDateMicrosoft(s, dateParseHandling, dateTimeZoneHandling, out dt))
return true;
}
}
else if (s.Length >= 19 && s.Length <= 40 && char.IsDigit(s[0]) && s[10] == 'T')
{
if (TryParseDateIso(s, dateParseHandling, dateTimeZoneHandling, out dt))
return true;
}
if (!string.IsNullOrEmpty(dateFormatString))
{
if (TryParseDateExact(s, dateParseHandling, dateTimeZoneHandling, dateFormatString, culture, out dt))
return true;
}
}
dt = null;
return false;
}
private static bool TryParseDateMicrosoft(string text, DateParseHandling dateParseHandling, DateTimeZoneHandling dateTimeZoneHandling, out object dt)
{
string value = text.Substring(6, text.Length - 8);
DateTimeKind kind = DateTimeKind.Utc;
int index = value.IndexOf('+', 1);
if (index == -1)
index = value.IndexOf('-', 1);
#if !NET20
TimeSpan offset = TimeSpan.Zero;
#endif
if (index != -1)
{
kind = DateTimeKind.Local;
#if !NET20
offset = ReadOffset(value.Substring(index));
#endif
value = value.Substring(0, index);
}
long javaScriptTicks;
if (!long.TryParse(value, NumberStyles.Integer, CultureInfo.InvariantCulture, out javaScriptTicks))
{
dt = null;
return false;
}
DateTime utcDateTime = ConvertJavaScriptTicksToDateTime(javaScriptTicks);
#if !NET20
if (dateParseHandling == DateParseHandling.DateTimeOffset)
{
dt = new DateTimeOffset(utcDateTime.Add(offset).Ticks, offset);
return true;
}
#endif
DateTime dateTime;
switch (kind)
{
case DateTimeKind.Unspecified:
dateTime = DateTime.SpecifyKind(utcDateTime.ToLocalTime(), DateTimeKind.Unspecified);
break;
case DateTimeKind.Local:
dateTime = utcDateTime.ToLocalTime();
break;
default:
dateTime = utcDateTime;
break;
}
dt = EnsureDateTime(dateTime, dateTimeZoneHandling);
return true;
}
private static bool TryParseDateExact(string text, DateParseHandling dateParseHandling, DateTimeZoneHandling dateTimeZoneHandling, string dateFormatString, CultureInfo culture, out object dt)
{
#if !NET20
if (dateParseHandling == DateParseHandling.DateTimeOffset)
{
DateTimeOffset temp;
if (DateTimeOffset.TryParseExact(text, dateFormatString, culture, DateTimeStyles.RoundtripKind, out temp))
{
dt = temp;
return true;
}
}
else
#endif
{
DateTime temp;
if (DateTime.TryParseExact(text, dateFormatString, culture, DateTimeStyles.RoundtripKind, out temp))
{
temp = EnsureDateTime(temp, dateTimeZoneHandling);
dt = temp;
return true;
}
}
dt = null;
return false;
}
#if !NET20
private static TimeSpan ReadOffset(string offsetText)
{
bool negative = (offsetText[0] == '-');
int hours = int.Parse(offsetText.Substring(1, 2), NumberStyles.Integer, CultureInfo.InvariantCulture);
int minutes = 0;
if (offsetText.Length >= 5)
minutes = int.Parse(offsetText.Substring(3, 2), NumberStyles.Integer, CultureInfo.InvariantCulture);
TimeSpan offset = TimeSpan.FromHours(hours) + TimeSpan.FromMinutes(minutes);
if (negative)
offset = offset.Negate();
return offset;
}
#endif
#endregion
#region Write
internal static void WriteDateTimeString(TextWriter writer, DateTime value, DateFormatHandling format, string formatString, CultureInfo culture)
{
if (string.IsNullOrEmpty(formatString))
{
char[] chars = new char[64];
int pos = WriteDateTimeString(chars, 0, value, null, value.Kind, format);
writer.Write(chars, 0, pos);
}
else
{
writer.Write(value.ToString(formatString, culture));
}
}
internal static int WriteDateTimeString(char[] chars, int start, DateTime value, TimeSpan? offset, DateTimeKind kind, DateFormatHandling format)
{
int pos = start;
if (format == DateFormatHandling.MicrosoftDateFormat)
{
TimeSpan o = offset ?? value.GetUtcOffset();
long javaScriptTicks = ConvertDateTimeToJavaScriptTicks(value, o);
@"\/Date(".CopyTo(0, chars, pos, 7);
pos += 7;
string ticksText = javaScriptTicks.ToString(CultureInfo.InvariantCulture);
ticksText.CopyTo(0, chars, pos, ticksText.Length);
pos += ticksText.Length;
switch (kind)
{
case DateTimeKind.Unspecified:
if (value != DateTime.MaxValue && value != DateTime.MinValue)
pos = WriteDateTimeOffset(chars, pos, o, format);
break;
case DateTimeKind.Local:
pos = WriteDateTimeOffset(chars, pos, o, format);
break;
}
@")\/".CopyTo(0, chars, pos, 3);
pos += 3;
}
else
{
pos = WriteDefaultIsoDate(chars, pos, value);
switch (kind)
{
case DateTimeKind.Local:
pos = WriteDateTimeOffset(chars, pos, offset ?? value.GetUtcOffset(), format);
break;
case DateTimeKind.Utc:
chars[pos++] = 'Z';
break;
}
}
return pos;
}
internal static int WriteDefaultIsoDate(char[] chars, int start, DateTime dt)
{
int length = 19;
int year;
int month;
int day;
GetDateValues(dt, out year, out month, out day);
CopyIntToCharArray(chars, start, year, 4);
chars[start + 4] = '-';
CopyIntToCharArray(chars, start + 5, month, 2);
chars[start + 7] = '-';
CopyIntToCharArray(chars, start + 8, day, 2);
chars[start + 10] = 'T';
CopyIntToCharArray(chars, start + 11, dt.Hour, 2);
chars[start + 13] = ':';
CopyIntToCharArray(chars, start + 14, dt.Minute, 2);
chars[start + 16] = ':';
CopyIntToCharArray(chars, start + 17, dt.Second, 2);
int fraction = (int)(dt.Ticks % 10000000L);
if (fraction != 0)
{
int digits = 7;
while ((fraction % 10) == 0)
{
digits--;
fraction /= 10;
}
chars[start + 19] = '.';
CopyIntToCharArray(chars, start + 20, fraction, digits);
length += digits + 1;
}
return start + length;
}
private static void CopyIntToCharArray(char[] chars, int start, int value, int digits)
{
while (digits-- != 0)
{
chars[start + digits] = (char)((value % 10) + 48);
value /= 10;
}
}
internal static int WriteDateTimeOffset(char[] chars, int start, TimeSpan offset, DateFormatHandling format)
{
chars[start++] = (offset.Ticks >= 0L) ? '+' : '-';
int absHours = Math.Abs(offset.Hours);
CopyIntToCharArray(chars, start, absHours, 2);
start += 2;
if (format == DateFormatHandling.IsoDateFormat)
chars[start++] = ':';
int absMinutes = Math.Abs(offset.Minutes);
CopyIntToCharArray(chars, start, absMinutes, 2);
start += 2;
return start;
}
#if !NET20
internal static void WriteDateTimeOffsetString(TextWriter writer, DateTimeOffset value, DateFormatHandling format, string formatString, CultureInfo culture)
{
if (string.IsNullOrEmpty(formatString))
{
char[] chars = new char[64];
int pos = WriteDateTimeString(chars, 0, (format == DateFormatHandling.IsoDateFormat) ? value.DateTime : value.UtcDateTime, value.Offset, DateTimeKind.Local, format);
writer.Write(chars, 0, pos);
}
else
{
writer.Write(value.ToString(formatString, culture));
}
}
#endif
#endregion
private static void GetDateValues(DateTime td, out int year, out int month, out int day)
{
long ticks = td.Ticks;
// n = number of days since 1/1/0001
int n = (int)(ticks / TicksPerDay);
// y400 = number of whole 400-year periods since 1/1/0001
int y400 = n / DaysPer400Years;
// n = day number within 400-year period
n -= y400 * DaysPer400Years;
// y100 = number of whole 100-year periods within 400-year period
int y100 = n / DaysPer100Years;
// Last 100-year period has an extra day, so decrement result if 4
if (y100 == 4)
y100 = 3;
// n = day number within 100-year period
n -= y100 * DaysPer100Years;
// y4 = number of whole 4-year periods within 100-year period
int y4 = n / DaysPer4Years;
// n = day number within 4-year period
n -= y4 * DaysPer4Years;
// y1 = number of whole years within 4-year period
int y1 = n / DaysPerYear;
// Last year has an extra day, so decrement result if 4
if (y1 == 4)
y1 = 3;
year = y400 * 400 + y100 * 100 + y4 * 4 + y1 + 1;
// n = day number within year
n -= y1 * DaysPerYear;
// Leap year calculation looks different from IsLeapYear since y1, y4,
// and y100 are relative to year 1, not year 0
bool leapYear = y1 == 3 && (y4 != 24 || y100 == 3);
int[] days = leapYear ? DaysToMonth366 : DaysToMonth365;
// All months have less than 32 days, so n >> 5 is a good conservative
// estimate for the month
int m = n >> 5 + 1;
// m = 1-based month number
while (n >= days[m])
{
m++;
}
month = m;
// Return 1-based day-of-month
day = n - days[m - 1] + 1;
}
}
}