DateTimeUtils
using System;
using System.Globalization;
using System.IO;
using System.Xml;
namespace Newtonsoft.Json.Utilities
{
internal static class DateTimeUtils
{
internal static readonly long InitialJavaScriptDateTicks;
private const string IsoDateFormat = "yyyy-MM-ddTHH:mm:ss.FFFFFFFK";
private const int DaysPer100Years = 36524;
private const int DaysPer400Years = 146097;
private const int DaysPer4Years = 1461;
private const int DaysPerYear = 365;
private const long TicksPerDay = 864000000000;
private static readonly int[] DaysToMonth365;
private static readonly int[] DaysToMonth366;
static DateTimeUtils()
{
InitialJavaScriptDateTicks = 621355968000000000;
DaysToMonth365 = new int[13] {
0,
31,
59,
90,
120,
151,
181,
212,
243,
273,
304,
334,
365
};
DaysToMonth366 = new int[13] {
0,
31,
60,
91,
121,
152,
182,
213,
244,
274,
305,
335,
366
};
}
public static TimeSpan GetUtcOffset(this DateTime d)
{
return TimeZoneInfo.Local.GetUtcOffset(d);
}
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.");
}
}
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;
default:
throw new ArgumentException("Invalid date time handling value.");
case DateTimeZoneHandling.RoundtripKind:
break;
}
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;
default:
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();
default:
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)
{
if (dateTime.Kind == DateTimeKind.Utc || dateTime == DateTime.MaxValue || dateTime == DateTime.MinValue)
return dateTime.Ticks;
long num = dateTime.Ticks - offset.Ticks;
if (num > 3155378975999999999)
return 3155378975999999999;
if (num < 0)
return 0;
return num;
}
internal static long ConvertDateTimeToJavaScriptTicks(DateTime dateTime, TimeSpan offset)
{
return UniversialTicksToJavaScriptTicks(ToUniversalTicks(dateTime, offset));
}
internal static long ConvertDateTimeToJavaScriptTicks(DateTime dateTime)
{
return ConvertDateTimeToJavaScriptTicks(dateTime, true);
}
internal static long ConvertDateTimeToJavaScriptTicks(DateTime dateTime, bool convertToUtc)
{
return UniversialTicksToJavaScriptTicks(convertToUtc ? ToUniversalTicks(dateTime) : dateTime.Ticks);
}
private static long UniversialTicksToJavaScriptTicks(long universialTicks)
{
return (universialTicks - InitialJavaScriptDateTicks) / 10000;
}
internal static DateTime ConvertJavaScriptTicksToDateTime(long javaScriptTicks)
{
return new DateTime(javaScriptTicks * 10000 + InitialJavaScriptDateTicks, DateTimeKind.Utc);
}
internal static bool TryParseDateTimeIso(StringReference text, DateTimeZoneHandling dateTimeZoneHandling, out DateTime dt)
{
DateTimeParser dateTimeParser = default(DateTimeParser);
if (!dateTimeParser.Parse(text.Chars, text.StartIndex, text.Length)) {
dt = default(DateTime);
return false;
}
DateTime dateTime = CreateDateTime(dateTimeParser);
DateTime dateTime2;
TimeSpan utcOffset;
switch (dateTimeParser.Zone) {
case ParserTimeZone.Utc:
dateTime = new DateTime(dateTime.Ticks, DateTimeKind.Utc);
break;
case ParserTimeZone.LocalWestOfUtc: {
TimeSpan timeSpan2 = new TimeSpan(dateTimeParser.ZoneHour, dateTimeParser.ZoneMinute, 0);
long num = dateTime.Ticks + timeSpan2.Ticks;
long num5 = num;
dateTime2 = DateTime.MaxValue;
if (num5 <= dateTime2.Ticks) {
dateTime2 = new DateTime(num, DateTimeKind.Utc);
dateTime = dateTime2.ToLocalTime();
} else {
long num6 = num;
utcOffset = dateTime.GetUtcOffset();
num = num6 + utcOffset.Ticks;
long num7 = num;
dateTime2 = DateTime.MaxValue;
if (num7 > dateTime2.Ticks) {
dateTime2 = DateTime.MaxValue;
num = dateTime2.Ticks;
}
dateTime = new DateTime(num, DateTimeKind.Local);
}
break;
}
case ParserTimeZone.LocalEastOfUtc: {
TimeSpan timeSpan = new TimeSpan(dateTimeParser.ZoneHour, dateTimeParser.ZoneMinute, 0);
long num = dateTime.Ticks - timeSpan.Ticks;
long num2 = num;
dateTime2 = DateTime.MinValue;
if (num2 >= dateTime2.Ticks) {
dateTime2 = new DateTime(num, DateTimeKind.Utc);
dateTime = dateTime2.ToLocalTime();
} else {
long num3 = num;
utcOffset = dateTime.GetUtcOffset();
num = num3 + utcOffset.Ticks;
long num4 = num;
dateTime2 = DateTime.MinValue;
if (num4 < dateTime2.Ticks) {
dateTime2 = DateTime.MinValue;
num = dateTime2.Ticks;
}
dateTime = new DateTime(num, DateTimeKind.Local);
}
break;
}
}
dt = EnsureDateTime(dateTime, dateTimeZoneHandling);
return true;
}
internal static bool TryParseDateTimeOffsetIso(StringReference text, out DateTimeOffset dt)
{
DateTimeParser dateTimeParser = default(DateTimeParser);
if (!dateTimeParser.Parse(text.Chars, text.StartIndex, text.Length)) {
dt = default(DateTimeOffset);
return false;
}
DateTime dateTime = CreateDateTime(dateTimeParser);
TimeSpan offset;
switch (dateTimeParser.Zone) {
case ParserTimeZone.Utc:
offset = new TimeSpan(0);
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(dateTime);
break;
}
long num = dateTime.Ticks - offset.Ticks;
if (num < 0 || num > 3155378975999999999) {
dt = default(DateTimeOffset);
return false;
}
dt = new DateTimeOffset(dateTime, offset);
return true;
}
private static DateTime CreateDateTime(DateTimeParser dateTimeParser)
{
bool flag;
if (dateTimeParser.Hour == 24) {
flag = true;
dateTimeParser.Hour = 0;
} else
flag = false;
DateTime result = new DateTime(dateTimeParser.Year, dateTimeParser.Month, dateTimeParser.Day, dateTimeParser.Hour, dateTimeParser.Minute, dateTimeParser.Second);
result = result.AddTicks(dateTimeParser.Fraction);
if (flag)
result = result.AddDays(1);
return result;
}
internal static bool TryParseDateTime(StringReference s, DateTimeZoneHandling dateTimeZoneHandling, string dateFormatString, CultureInfo culture, out DateTime dt)
{
if (s.Length > 0) {
int startIndex = s.StartIndex;
if (s[startIndex] == '/') {
if (s.Length >= 9 && s.StartsWith("/Date(") && s.EndsWith(")/") && TryParseDateTimeMicrosoft(s, dateTimeZoneHandling, out dt))
return true;
} else if (s.Length >= 19 && s.Length <= 40 && char.IsDigit(s[startIndex]) && s[startIndex + 10] == 'T' && TryParseDateTimeIso(s, dateTimeZoneHandling, out dt)) {
return true;
}
if (!string.IsNullOrEmpty(dateFormatString) && TryParseDateTimeExact(s.ToString(), dateTimeZoneHandling, dateFormatString, culture, out dt))
return true;
}
dt = default(DateTime);
return false;
}
internal static bool TryParseDateTime(string s, DateTimeZoneHandling dateTimeZoneHandling, string dateFormatString, CultureInfo culture, out DateTime dt)
{
if (s.Length > 0) {
if (s[0] == '/') {
if (s.Length >= 9 && s.StartsWith("/Date(", StringComparison.Ordinal) && s.EndsWith(")/", StringComparison.Ordinal) && TryParseDateTimeMicrosoft(new StringReference(s.ToCharArray(), 0, s.Length), dateTimeZoneHandling, out dt))
return true;
} else if (s.Length >= 19 && s.Length <= 40 && char.IsDigit(s[0]) && s[10] == 'T' && DateTime.TryParseExact(s, "yyyy-MM-ddTHH:mm:ss.FFFFFFFK", CultureInfo.InvariantCulture, DateTimeStyles.RoundtripKind, out dt)) {
dt = EnsureDateTime(dt, dateTimeZoneHandling);
return true;
}
if (!string.IsNullOrEmpty(dateFormatString) && TryParseDateTimeExact(s, dateTimeZoneHandling, dateFormatString, culture, out dt))
return true;
}
dt = default(DateTime);
return false;
}
internal static bool TryParseDateTimeOffset(StringReference s, string dateFormatString, CultureInfo culture, out DateTimeOffset dt)
{
if (s.Length > 0) {
int startIndex = s.StartIndex;
if (s[startIndex] == '/') {
if (s.Length >= 9 && s.StartsWith("/Date(") && s.EndsWith(")/") && TryParseDateTimeOffsetMicrosoft(s, out dt))
return true;
} else if (s.Length >= 19 && s.Length <= 40 && char.IsDigit(s[startIndex]) && s[startIndex + 10] == 'T' && TryParseDateTimeOffsetIso(s, out dt)) {
return true;
}
if (!string.IsNullOrEmpty(dateFormatString) && TryParseDateTimeOffsetExact(s.ToString(), dateFormatString, culture, out dt))
return true;
}
dt = default(DateTimeOffset);
return false;
}
internal static bool TryParseDateTimeOffset(string s, string dateFormatString, CultureInfo culture, out DateTimeOffset dt)
{
if (s.Length > 0) {
if (s[0] == '/') {
if (s.Length >= 9 && s.StartsWith("/Date(", StringComparison.Ordinal) && s.EndsWith(")/", StringComparison.Ordinal) && TryParseDateTimeOffsetMicrosoft(new StringReference(s.ToCharArray(), 0, s.Length), out dt))
return true;
} else if (s.Length >= 19 && s.Length <= 40 && char.IsDigit(s[0]) && s[10] == 'T' && DateTimeOffset.TryParseExact(s, "yyyy-MM-ddTHH:mm:ss.FFFFFFFK", CultureInfo.InvariantCulture, DateTimeStyles.RoundtripKind, out dt) && TryParseDateTimeOffsetIso(new StringReference(s.ToCharArray(), 0, s.Length), out dt)) {
return true;
}
if (!string.IsNullOrEmpty(dateFormatString) && TryParseDateTimeOffsetExact(s, dateFormatString, culture, out dt))
return true;
}
dt = default(DateTimeOffset);
return false;
}
private static bool TryParseMicrosoftDate(StringReference text, out long ticks, out TimeSpan offset, out DateTimeKind kind)
{
kind = DateTimeKind.Utc;
int num = text.IndexOf('+', 7, text.Length - 8);
if (num == -1)
num = text.IndexOf('-', 7, text.Length - 8);
if (num != -1) {
kind = DateTimeKind.Local;
if (!TryReadOffset(text, num + text.StartIndex, out offset)) {
ticks = 0;
return false;
}
} else {
offset = TimeSpan.Zero;
num = text.Length - 2;
}
return ConvertUtils.Int64TryParse(text.Chars, 6 + text.StartIndex, num - 6, out ticks) == ParseResult.Success;
}
private static bool TryParseDateTimeMicrosoft(StringReference text, DateTimeZoneHandling dateTimeZoneHandling, out DateTime dt)
{
if (!TryParseMicrosoftDate(text, out long ticks, out TimeSpan _, out DateTimeKind kind)) {
dt = default(DateTime);
return false;
}
DateTime dateTime = ConvertJavaScriptTicksToDateTime(ticks);
switch (kind) {
case DateTimeKind.Unspecified:
dt = DateTime.SpecifyKind(dateTime.ToLocalTime(), DateTimeKind.Unspecified);
break;
case DateTimeKind.Local:
dt = dateTime.ToLocalTime();
break;
default:
dt = dateTime;
break;
}
dt = EnsureDateTime(dt, dateTimeZoneHandling);
return true;
}
private static bool TryParseDateTimeExact(string text, DateTimeZoneHandling dateTimeZoneHandling, string dateFormatString, CultureInfo culture, out DateTime dt)
{
if (DateTime.TryParseExact(text, dateFormatString, culture, DateTimeStyles.RoundtripKind, out DateTime result)) {
result = (dt = EnsureDateTime(result, dateTimeZoneHandling));
return true;
}
dt = default(DateTime);
return false;
}
private static bool TryParseDateTimeOffsetMicrosoft(StringReference text, out DateTimeOffset dt)
{
DateTime dateTime;
if (!TryParseMicrosoftDate(text, out long ticks, out TimeSpan offset, out DateTimeKind _)) {
dateTime = default(DateTime);
dt = dateTime;
return false;
}
dateTime = ConvertJavaScriptTicksToDateTime(ticks).Add(offset);
dt = new DateTimeOffset(dateTime.Ticks, offset);
return true;
}
private static bool TryParseDateTimeOffsetExact(string text, string dateFormatString, CultureInfo culture, out DateTimeOffset dt)
{
if (DateTimeOffset.TryParseExact(text, dateFormatString, culture, DateTimeStyles.RoundtripKind, out DateTimeOffset result)) {
dt = result;
return true;
}
dt = default(DateTimeOffset);
return false;
}
private static bool TryReadOffset(StringReference offsetText, int startIndex, out TimeSpan offset)
{
bool flag = offsetText[startIndex] == '-';
if (ConvertUtils.Int32TryParse(offsetText.Chars, startIndex + 1, 2, out int value) != ParseResult.Success) {
offset = default(TimeSpan);
return false;
}
int value2 = 0;
if (offsetText.Length - startIndex > 5 && ConvertUtils.Int32TryParse(offsetText.Chars, startIndex + 3, 2, out value2) != ParseResult.Success) {
offset = default(TimeSpan);
return false;
}
offset = TimeSpan.FromHours((double)value) + TimeSpan.FromMinutes((double)value2);
if (flag)
offset = offset.Negate();
return true;
}
internal static void WriteDateTimeString(TextWriter writer, DateTime value, DateFormatHandling format, string formatString, CultureInfo culture)
{
if (string.IsNullOrEmpty(formatString)) {
char[] array = new char[64];
int count = WriteDateTimeString(array, 0, value, null, value.Kind, format);
writer.Write(array, 0, count);
} else
writer.Write(value.ToString(formatString, culture));
}
internal static int WriteDateTimeString(char[] chars, int start, DateTime value, TimeSpan? offset, DateTimeKind kind, DateFormatHandling format)
{
int num2;
if (format == DateFormatHandling.MicrosoftDateFormat) {
TimeSpan offset2 = offset ?? value.GetUtcOffset();
long num = ConvertDateTimeToJavaScriptTicks(value, offset2);
"\\/Date(".CopyTo(0, chars, start, 7);
num2 = start + 7;
string text = num.ToString(CultureInfo.InvariantCulture);
text.CopyTo(0, chars, num2, text.Length);
num2 += text.Length;
switch (kind) {
case DateTimeKind.Unspecified:
if (value != DateTime.MaxValue && value != DateTime.MinValue)
num2 = WriteDateTimeOffset(chars, num2, offset2, format);
break;
case DateTimeKind.Local:
num2 = WriteDateTimeOffset(chars, num2, offset2, format);
break;
}
")\\/".CopyTo(0, chars, num2, 3);
num2 += 3;
} else {
num2 = WriteDefaultIsoDate(chars, start, value);
switch (kind) {
case DateTimeKind.Local:
num2 = WriteDateTimeOffset(chars, num2, offset ?? value.GetUtcOffset(), format);
break;
case DateTimeKind.Utc:
chars[num2++] = 'Z';
break;
}
}
return num2;
}
internal static int WriteDefaultIsoDate(char[] chars, int start, DateTime dt)
{
int num = 19;
GetDateValues(dt, out int year, out int month, out int 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 num2 = (int)(dt.Ticks % 10000000);
if (num2 != 0) {
int num3 = 7;
while (num2 % 10 == 0) {
num3--;
num2 /= 10;
}
chars[start + 19] = '.';
CopyIntToCharArray(chars, start + 20, num2, num3);
num += num3 + 1;
}
return start + num;
}
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 >= 0) ? '+' : '-');
int value = Math.Abs(offset.Hours);
CopyIntToCharArray(chars, start, value, 2);
start += 2;
if (format == DateFormatHandling.IsoDateFormat)
chars[start++] = ':';
int value2 = Math.Abs(offset.Minutes);
CopyIntToCharArray(chars, start, value2, 2);
start += 2;
return start;
}
internal static void WriteDateTimeOffsetString(TextWriter writer, DateTimeOffset value, DateFormatHandling format, string formatString, CultureInfo culture)
{
if (string.IsNullOrEmpty(formatString)) {
char[] array = new char[64];
int count = WriteDateTimeString(array, 0, (format == DateFormatHandling.IsoDateFormat) ? value.DateTime : value.UtcDateTime, value.Offset, DateTimeKind.Local, format);
writer.Write(array, 0, count);
} else
writer.Write(value.ToString(formatString, culture));
}
private static void GetDateValues(DateTime td, out int year, out int month, out int day)
{
int num = (int)(td.Ticks / 864000000000);
int num2 = num / 146097;
num -= num2 * 146097;
int num3 = num / 36524;
if (num3 == 4)
num3 = 3;
num -= num3 * 36524;
int num4 = num / 1461;
num -= num4 * 1461;
int num5 = num / 365;
if (num5 == 4)
num5 = 3;
year = num2 * 400 + num3 * 100 + num4 * 4 + num5 + 1;
num -= num5 * 365;
int[] array = (num5 == 3 && (num4 != 24 || num3 == 3)) ? DaysToMonth366 : DaysToMonth365;
int i;
for (i = num >> 6; num >= array[i]; i++) {
}
month = i;
day = num - array[i - 1] + 1;
}
}
}