Add migrated to .NET 8.0 variant of Hcs.Client

Hcs.ClientNet/GostCryptography/Asn1/Ber/Asn1DiscreteCharSet.cs

@@ -0,0 +1,58 @@
+using GostCryptography.Properties;
+
+namespace GostCryptography.Asn1.Ber
+{
+    public class Asn1DiscreteCharSet : Asn1CharSet
+    {
+        private readonly int[] _charSet;
+
+        public Asn1DiscreteCharSet(string charSet)
+            : base(charSet.Length)
+        {
+            _charSet = new int[charSet.Length];
+
+            for (var i = 0; i < _charSet.Length; i++)
+            {
+                _charSet[i] = charSet[i];
+            }
+        }
+
+        public Asn1DiscreteCharSet(int[] charSet)
+            : base(charSet.Length)
+        {
+            _charSet = charSet;
+        }
+
+        public override int MaxValue
+        {
+            get { return _charSet[_charSet.Length - 1]; }
+        }
+
+        public override int GetCharAtIndex(int index)
+        {
+            if (index >= _charSet.Length)
+            {
+                throw ExceptionUtility.CryptographicException(Resources.Asn1ConsVioException, "Character index", index);
+            }
+
+            return _charSet[index];
+        }
+
+        public override int GetCharIndex(int charValue)
+        {
+            var index = 0;
+
+            while ((index < _charSet.Length) && (_charSet[index] != charValue))
+            {
+                index++;
+            }
+
+            if (index >= _charSet.Length)
+            {
+                throw ExceptionUtility.CryptographicException(Resources.Asn1ConsVioException, "Character index", charValue);
+            }
+
+            return index;
+        }
+    }
+}