using System;

namespace System.Text.RegularExpressions
{
	// Token: 0x020002D2 RID: 722
	internal struct Interval : IComparable
	{
		// Token: 0x06001A3E RID: 6718 RVA: 0x0005EF7C File Offset: 0x0005D17C
		public Interval(int low, int high)
		{
			if (low > high)
			{
				int num = low;
				low = high;
				high = num;
			}
			this.low = low;
			this.high = high;
			this.contiguous = true;
		}

		// Token: 0x17000814 RID: 2068
		// (get) Token: 0x06001A3F RID: 6719 RVA: 0x0005EFB0 File Offset: 0x0005D1B0
		public static Interval Empty
		{
			get
			{
				Interval interval;
				interval.low = 0;
				interval.high = interval.low - 1;
				interval.contiguous = true;
				return interval;
			}
		}

		// Token: 0x17000815 RID: 2069
		// (get) Token: 0x06001A40 RID: 6720 RVA: 0x0005EFE0 File Offset: 0x0005D1E0
		public static Interval Entire
		{
			get
			{
				return new Interval(int.MinValue, int.MaxValue);
			}
		}

		// Token: 0x17000816 RID: 2070
		// (get) Token: 0x06001A41 RID: 6721 RVA: 0x0005EFF4 File Offset: 0x0005D1F4
		public bool IsDiscontiguous
		{
			get
			{
				return !this.contiguous;
			}
		}

		// Token: 0x17000817 RID: 2071
		// (get) Token: 0x06001A42 RID: 6722 RVA: 0x0005F000 File Offset: 0x0005D200
		public bool IsSingleton
		{
			get
			{
				return this.contiguous && this.low == this.high;
			}
		}

		// Token: 0x17000818 RID: 2072
		// (get) Token: 0x06001A43 RID: 6723 RVA: 0x0005F020 File Offset: 0x0005D220
		public bool IsRange
		{
			get
			{
				return !this.IsSingleton && !this.IsEmpty;
			}
		}

		// Token: 0x17000819 RID: 2073
		// (get) Token: 0x06001A44 RID: 6724 RVA: 0x0005F03C File Offset: 0x0005D23C
		public bool IsEmpty
		{
			get
			{
				return this.low > this.high;
			}
		}

		// Token: 0x1700081A RID: 2074
		// (get) Token: 0x06001A45 RID: 6725 RVA: 0x0005F04C File Offset: 0x0005D24C
		public int Size
		{
			get
			{
				if (this.IsEmpty)
				{
					return 0;
				}
				return this.high - this.low + 1;
			}
		}

		// Token: 0x06001A46 RID: 6726 RVA: 0x0005F06C File Offset: 0x0005D26C
		public bool IsDisjoint(Interval i)
		{
			return this.IsEmpty || i.IsEmpty || (this.low > i.high || i.low > this.high);
		}

		// Token: 0x06001A47 RID: 6727 RVA: 0x0005F0BC File Offset: 0x0005D2BC
		public bool IsAdjacent(Interval i)
		{
			return !this.IsEmpty && !i.IsEmpty && (this.low == i.high + 1 || this.high == i.low - 1);
		}

		// Token: 0x06001A48 RID: 6728 RVA: 0x0005F10C File Offset: 0x0005D30C
		public bool Contains(Interval i)
		{
			return (!this.IsEmpty && i.IsEmpty) || (!this.IsEmpty && this.low <= i.low && i.high <= this.high);
		}

		// Token: 0x06001A49 RID: 6729 RVA: 0x0005F168 File Offset: 0x0005D368
		public bool Contains(int i)
		{
			return this.low <= i && i <= this.high;
		}

		// Token: 0x06001A4A RID: 6730 RVA: 0x0005F188 File Offset: 0x0005D388
		public bool Intersects(Interval i)
		{
			return !this.IsEmpty && !i.IsEmpty && ((this.Contains(i.low) && !this.Contains(i.high)) || (this.Contains(i.high) && !this.Contains(i.low)));
		}

		// Token: 0x06001A4B RID: 6731 RVA: 0x0005F1FC File Offset: 0x0005D3FC
		public void Merge(Interval i)
		{
			if (i.IsEmpty)
			{
				return;
			}
			if (this.IsEmpty)
			{
				this.low = i.low;
				this.high = i.high;
			}
			if (i.low < this.low)
			{
				this.low = i.low;
			}
			if (i.high > this.high)
			{
				this.high = i.high;
			}
		}

		// Token: 0x06001A4C RID: 6732 RVA: 0x0005F27C File Offset: 0x0005D47C
		public void Intersect(Interval i)
		{
			if (this.IsDisjoint(i))
			{
				this.low = 0;
				this.high = this.low - 1;
				return;
			}
			if (i.low > this.low)
			{
				this.low = i.low;
			}
			if (i.high > this.high)
			{
				this.high = i.high;
			}
		}

		// Token: 0x06001A4D RID: 6733 RVA: 0x0005F2EC File Offset: 0x0005D4EC
		public int CompareTo(object o)
		{
			return this.low - ((Interval)o).low;
		}

		// Token: 0x06001A4E RID: 6734 RVA: 0x0005F310 File Offset: 0x0005D510
		public new string ToString()
		{
			if (this.IsEmpty)
			{
				return "(EMPTY)";
			}
			if (!this.contiguous)
			{
				return string.Concat(new object[] { "{", this.low, ", ", this.high, "}" });
			}
			if (this.IsSingleton)
			{
				return "(" + this.low + ")";
			}
			return string.Concat(new object[] { "(", this.low, ", ", this.high, ")" });
		}

		// Token: 0x04001599 RID: 5529
		public int low;

		// Token: 0x0400159A RID: 5530
		public int high;

		// Token: 0x0400159B RID: 5531
		public bool contiguous;
	}
}