progress

AspClassic.Scripting/SymbolId.cs

@@ -0,0 +1,130 @@
+using System;
+using System.Runtime.Serialization;
+using System.Security.Permissions;
+using AspClassic.Scripting.Utils;
+
+namespace AspClassic.Scripting;
+
+[Serializable]
+public struct SymbolId : ISerializable, IComparable, IComparable<SymbolId>, IEquatable<SymbolId>
+{
+	public const int EmptyId = 0;
+
+	public const int InvalidId = -1;
+
+	private readonly int _id;
+
+	public static readonly SymbolId Empty = new SymbolId(0);
+
+	public static readonly SymbolId[] EmptySymbols = new SymbolId[0];
+
+	public static readonly SymbolId Invalid = new SymbolId(-1);
+
+	public int Id => _id;
+
+	public SymbolId CaseInsensitiveIdentifier => new SymbolId(_id & 0xFFFFFF);
+
+	public int CaseInsensitiveId => _id & 0xFFFFFF;
+
+	public bool IsCaseInsensitive => (_id & -16777216) == 0;
+
+	public bool IsEmpty => _id == 0;
+
+	public bool IsInvalid => _id == -1;
+
+	public SymbolId(int value)
+	{
+		_id = value;
+	}
+
+	public SymbolId(SymbolId value)
+	{
+		_id = value._id;
+	}
+
+	public override bool Equals(object obj)
+	{
+		if (!(obj is SymbolId))
+		{
+			return false;
+		}
+		return Equals((SymbolId)obj);
+	}
+
+	public bool Equals(SymbolId other)
+	{
+		if (_id == other._id)
+		{
+			return true;
+		}
+		if (IsCaseInsensitive || other.IsCaseInsensitive)
+		{
+			return (_id & 0xFFFFFF) == (other._id & 0xFFFFFF);
+		}
+		return false;
+	}
+
+	public override int GetHashCode()
+	{
+		return _id & 0xFFFFFF;
+	}
+
+	public override string ToString()
+	{
+		return SymbolTable.IdToString(this);
+	}
+
+	public static explicit operator SymbolId(string s)
+	{
+		return SymbolTable.StringToId(s);
+	}
+
+	public static bool operator ==(SymbolId a, SymbolId b)
+	{
+		return a.Equals(b);
+	}
+
+	public static bool operator !=(SymbolId a, SymbolId b)
+	{
+		return !a.Equals(b);
+	}
+
+	public static bool operator <(SymbolId a, SymbolId b)
+	{
+		return a.CompareTo(b) < 0;
+	}
+
+	public static bool operator >(SymbolId a, SymbolId b)
+	{
+		return a.CompareTo(b) > 0;
+	}
+
+	public int CompareTo(object obj)
+	{
+		if (!(obj is SymbolId))
+		{
+			return -1;
+		}
+		return CompareTo((SymbolId)obj);
+	}
+
+	public int CompareTo(SymbolId other)
+	{
+		string text = SymbolTable.IdToString(this);
+		string strB = SymbolTable.IdToString(other);
+		return text.CompareTo(strB);
+	}
+
+	private SymbolId(SerializationInfo info, StreamingContext context)
+	{
+		ContractUtils.RequiresNotNull(info, "info");
+		_id = SymbolTable.StringToId(info.GetString("symbolName"))._id;
+	}
+
+	[SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.SerializationFormatter)]
+	public void GetObjectData(SerializationInfo info, StreamingContext context)
+	{
+		ContractUtils.RequiresNotNull(info, "info");
+		info.AddValue("symbolName", SymbolTable.IdToString(this));
+	}
+}