public static bool StartsWith(this StringReference s, string text) { if (text.Length > s.Length) { return(false); } char[] chars = s.Chars; for (int i = 0; i < text.Length; i++) { if (text[i] != chars[i + s.StartIndex]) { return(false); } } return(true); }
internal static bool TryParseDateTimeIso(StringReference text, DateTimeZoneHandling dateTimeZoneHandling, out DateTime dt) { DateTimeParser dateTimeParser = new DateTimeParser(); if (!dateTimeParser.Parse(text.Chars, text.StartIndex, text.Length)) { dt = default(DateTime); return(false); } DateTime d = CreateDateTime(dateTimeParser); 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); }