Added draft implementation of common value types, nullable variations, enums, and object callback.

source/Cosmos.Core_Plugs/System/Collections/Generic/ComparerHelpersImpl.cs

@@ -26,32 +26,151 @@ namespace Cosmos.Core_Plugs.System.Collections.Generic
         {
             Debugger.DoBochsBreak();
 
+            //TODO: Do application level testing to determine the most frequent comparisons and do those type checks first.
+
+            /*
+             * For now I've made some assumptions about how common each type is.
+             * Strings are very common for controls, messages, console input/output, etc.
+             * Bytes will be used for binary operations and protocols.
+             * Int I believe will be used for return codes and 32 registers (which I expect to be common with x86 and ARM).
+             * Long should be semi-unique identifiers.
+             * I don't except Char to be as common as string but I expect to be used in roughly the same way.
+             * The only use case I see for short off-hand is PCM data but that might be more useful for audio support at a later date.
+             */
+
+            if (aType == typeof(Byte))
+            {
+                return new ByteEqualityComparer();
+            }
+
+            if (aType == typeof(Byte?))
+            {
+                return new NullableByteEqualityComparer();
+            }
+
+            if (aType == typeof(SByte))
+            {
+                return new SByteEqualityComparer();
+            }
+
+            if (aType == typeof(SByte?))
+            {
+                return new NullableSByteEqualityComparer();
+            }
+
             if (aType == typeof(string))
             {
                 return new StringEqualityComparer();
-            }
-
-            if (aType == typeof(char))
-            {
-                return new CharEqualityComparer();
-            }
-
-            if (aType == typeof(int))
+            }
+
+            if (aType == typeof(Int32))
             {
                 return new Int32EqualityComparer();
-            }
-
-            if (aType == typeof(byte))
+            }
+
+            if (aType == typeof(Int32?))
             {
-                return new ByteEqualityComparer();
-            }
-
-            // TODO: Nullable<>
-
-            // TODO: Enum (Comparer is special to avoid boxing)
-
-            mDebugger.Send($"No EqualityComparer for type {aType}");
-            return null;
+                return new NullableInt32EqualityComparer();
+            }
+
+            if (aType == typeof(UInt32))
+            {
+                return new UInt32EqualityComparer();
+            }
+
+            if (aType == typeof(UInt32?))
+            {
+                return new NullableUInt32EqualityComparer();
+            }
+
+            if (aType == typeof(Int64))
+            {
+                return new Int64EqualityComparer();
+            }
+
+            if (aType == typeof(Int64?))
+            {
+                return new NullableInt64EqualityComparer();
+            }
+
+            if (aType == typeof(UInt64))
+            {
+                return new UInt64EqualityComparer();
+            }
+
+            if (aType == typeof(UInt64?))
+            {
+                return new NullableUInt64EqualityComparer();
+            }
+
+            if (aType == typeof(Char))
+            {
+                return new CharEqualityComparer();
+            }
+
+            if (aType == typeof(Char?))
+            {
+                return new NullableCharEqualityComparer();
+            }
+
+            if (aType == typeof(Int16))
+            {
+                return new Int16EqualityComparer();
+            }
+
+            if (aType == typeof(Int16?))
+            {
+                return new NullableInt16EqualityComparer();
+            }
+
+            if (aType == typeof(UInt16))
+            {
+                return new UInt16EqualityComparer();
+            }
+
+            if (aType == typeof(UInt16?))
+            {
+                return new NullableUInt16EqualityComparer();
+            }
+
+            if (aType == typeof(Guid))
+            {
+                return new GuidEqualityComparer();
+            }
+
+            if (aType == typeof(Guid?))
+            {
+                return new NullableGuidEqualityComparer();
+            }
+
+            if (aType.IsEnum)
+            {
+                switch (Type.GetTypeCode(Enum.GetUnderlyingType(aType)))
+                {
+                    case TypeCode.SByte:
+                        return new SByteEqualityComparer();
+                    case TypeCode.Byte:
+                        return new ByteEqualityComparer();
+                    case TypeCode.Int16:
+                        return new Int16EqualityComparer();
+                    case TypeCode.UInt16:
+                        return new UInt16EqualityComparer();
+                    case TypeCode.Int32:
+                        return new Int32EqualityComparer();
+                    case TypeCode.UInt32:
+                        return new UInt32EqualityComparer();
+                    case TypeCode.Int64:
+                        return new Int64EqualityComparer();
+                    case TypeCode.UInt64:
+                        return new UInt64EqualityComparer();
+                    default:
+                        return null;
+                }
+            }
+
+            //MS framework falls back to address compare so we'll do the same.
+            //mDebugger.Send($"No EqualityComparer for type {aType}");
+            return new ObjectEqualityComparer();
         }
     }
 
@@ -76,7 +195,7 @@ namespace Cosmos.Core_Plugs.System.Collections.Generic
         }
     }
 
-    public class CharEqualityComparer : EqualityComparer<char>
+    public class CharEqualityComparer : EqualityComparer<Char>
     {
         public override bool Equals(char x, char y)
         {
@@ -87,31 +206,398 @@ namespace Cosmos.Core_Plugs.System.Collections.Generic
         {
             return val.GetHashCode();
         }
+    }
+
+    public class NullableCharEqualityComparer : EqualityComparer<Char?>
+    {
+        public override bool Equals(Char? x, Char? y)
+        {
+            if (x.HasValue)
+            {
+                if (y.HasValue)
+                {
+                    return x.Value.Equals(y.Value);
+                }
+                return false;
+            }
+            if (y.HasValue)
+            {
+                return false;
+            }
+            return true;
+        }
+
+        public override int GetHashCode(Char? val)
+        {
+            return val.HasValue ? val.Value.GetHashCode() : 0;
+        }
     }
 
-    public class ByteEqualityComparer : EqualityComparer<byte>
+    public class ByteEqualityComparer : EqualityComparer<Byte>
     {
-        public override bool Equals(byte x, byte y)
+        public override bool Equals(Byte x, Byte y)
         {
             return x == y;
         }
 
-        public override int GetHashCode(byte val)
+        public override int GetHashCode(Byte val)
         {
             return val.GetHashCode();
         }
-    }
-
-    public class Int32EqualityComparer : EqualityComparer<int>
+    }
+
+    public class NullableByteEqualityComparer : EqualityComparer<Byte?>
     {
-        public override bool Equals(int x, int y)
+        public override bool Equals(Byte? x, Byte? y)
+        {
+            if (x.HasValue)
+            {
+                if (y.HasValue)
+                {
+                    return x.Value.Equals(y.Value);
+                }
+                return false;
+            }
+            if (y.HasValue)
+            {
+                return false;
+            }
+            return true;
+        }
+
+        public override int GetHashCode(Byte? val)
+        {
+            return val.HasValue ? val.Value.GetHashCode() : 0;
+        }
+    }
+
+    public class SByteEqualityComparer : EqualityComparer<SByte>
+    {
+        public override bool Equals(SByte x, SByte y)
         {
             return x == y;
         }
 
-        public override int GetHashCode(int val)
+        public override int GetHashCode(SByte val)
         {
             return val.GetHashCode();
         }
+    }
+
+    public class NullableSByteEqualityComparer : EqualityComparer<SByte?>
+    {
+        public override bool Equals(SByte? x, SByte? y)
+        {
+            if (x.HasValue)
+            {
+                if (y.HasValue)
+                {
+                    return x.Value.Equals(y.Value);
+                }
+                return false;
+            }
+            if (y.HasValue)
+            {
+                return false;
+            }
+            return true;
+        }
+
+        public override int GetHashCode(SByte? val)
+        {
+            return val.HasValue ? val.Value.GetHashCode() : 0;
+        }
+    }
+
+    public class Int16EqualityComparer : EqualityComparer<Int16>
+    {
+        public override bool Equals(Int16 x, Int16 y)
+        {
+            return x == y;
+        }
+
+        public override int GetHashCode(Int16 val)
+        {
+            return val.GetHashCode();
+        }
+    }
+
+    public class NullableInt16EqualityComparer : EqualityComparer<Int16?>
+    {
+        public override bool Equals(Int16? x, Int16? y)
+        {
+            if (x.HasValue)
+            {
+                if (y.HasValue)
+                {
+                    return x.Value.Equals(y.Value);
+                }
+                return false;
+            }
+            if (y.HasValue)
+            {
+                return false;
+            }
+            return true;
+        }
+
+        public override int GetHashCode(Int16? val)
+        {
+            return val.HasValue ? val.Value.GetHashCode() : 0;
+        }
+    }
+
+    public class UInt16EqualityComparer : EqualityComparer<UInt16>
+    {
+        public override bool Equals(UInt16 x, UInt16 y)
+        {
+            return x == y;
+        }
+
+        public override int GetHashCode(UInt16 val)
+        {
+            return val.GetHashCode();
+        }
+    }
+
+    public class NullableUInt16EqualityComparer : EqualityComparer<UInt16?>
+    {
+        public override bool Equals(UInt16? x, UInt16? y)
+        {
+            if (x.HasValue)
+            {
+                if (y.HasValue)
+                {
+                    return x.Value.Equals(y.Value);
+                }
+                return false;
+            }
+            if (y.HasValue)
+            {
+                return false;
+            }
+            return true;
+        }
+
+        public override int GetHashCode(UInt16? val)
+        {
+            return val.HasValue ? val.Value.GetHashCode() : 0;
+        }
     }
+
+    public class Int32EqualityComparer : EqualityComparer<Int32>
+    {
+        public override bool Equals(Int32 x, Int32 y)
+        {
+            return x == y;
+        }
+
+        public override int GetHashCode(Int32 val)
+        {
+            return val.GetHashCode();
+        }
+    }
+
+    public class NullableInt32EqualityComparer : EqualityComparer<Int32?>
+    {
+        public override bool Equals(Int32? x, Int32? y)
+        {
+            if (x.HasValue)
+            {
+                if (y.HasValue)
+                {
+                    return x.Value.Equals(y.Value);
+                }
+                return false;
+            }
+            if (y.HasValue)
+            {
+                return false;
+            }
+            return true;
+        }
+
+        public override int GetHashCode(Int32? val)
+        {
+            return val.HasValue ? val.Value.GetHashCode() : 0;
+        }
+    }
+
+    public class UInt32EqualityComparer : EqualityComparer<UInt32>
+    {
+        public override bool Equals(UInt32 x, UInt32 y)
+        {
+            return x == y;
+        }
+
+        public override int GetHashCode(UInt32 val)
+        {
+            return val.GetHashCode();
+        }
+    }
+
+    public class NullableUInt32EqualityComparer : EqualityComparer<UInt32?>
+    {
+        public override bool Equals(UInt32? x, UInt32? y)
+        {
+            if (x.HasValue)
+            {
+                if (y.HasValue)
+                {
+                    return x.Value.Equals(y.Value);
+                }
+                return false;
+            }
+            if (y.HasValue)
+            {
+                return false;
+            }
+            return true;
+        }
+
+        public override int GetHashCode(UInt32? val)
+        {
+            return val.HasValue ? val.Value.GetHashCode() : 0;
+        }
+    }
+
+    public class Int64EqualityComparer : EqualityComparer<Int64>
+    {
+        public override bool Equals(Int64 x, Int64 y)
+        {
+            return x == y;
+        }
+
+        public override int GetHashCode(Int64 val)
+        {
+            return val.GetHashCode();
+        }
+    }
+
+    public class NullableInt64EqualityComparer : EqualityComparer<Int64?>
+    {
+        public override bool Equals(Int64? x, Int64? y)
+        {
+            if (x.HasValue)
+            {
+                if (y.HasValue)
+                {
+                    return x.Value.Equals(y.Value);
+                }
+                return false;
+            }
+            if (y.HasValue)
+            {
+                return false;
+            }
+            return true;
+        }
+
+        public override int GetHashCode(Int64? val)
+        {
+            return val.HasValue ? val.Value.GetHashCode() : 0;
+        }
+    }
+
+    public class UInt64EqualityComparer : EqualityComparer<UInt64>
+    {
+        public override bool Equals(UInt64 x, UInt64 y)
+        {
+            return x == y;
+        }
+
+        public override int GetHashCode(UInt64 val)
+        {
+            return val.GetHashCode();
+        }
+    }
+
+    public class NullableUInt64EqualityComparer : EqualityComparer<UInt64?>
+    {
+        public override bool Equals(UInt64? x, UInt64? y)
+        {
+            if (x.HasValue)
+            {
+                if (y.HasValue)
+                {
+                    return x.Value.Equals(y.Value);
+                }
+                return false;
+            }
+            if (y.HasValue)
+            {
+                return false;
+            }
+            return true;
+        }
+
+        public override int GetHashCode(UInt64? val)
+        {
+            return val.HasValue ? val.Value.GetHashCode() : 0;
+        }
+    }
+
+    public class GuidEqualityComparer : EqualityComparer<Guid>
+    {
+        public override bool Equals(Guid x, Guid y)
+        {
+            return x == y;
+        }
+
+        public override int GetHashCode(Guid val)
+        {
+            return val.GetHashCode();
+        }
+    }
+
+    public class NullableGuidEqualityComparer : EqualityComparer<Guid?>
+    {
+        public override bool Equals(Guid? x, Guid? y)
+        {
+            if (x.HasValue)
+            {
+                if (y.HasValue)
+                {
+                    return x.Value.Equals(y.Value);
+                }
+                return false;
+            }
+            if (y.HasValue)
+            {
+                return false;
+            }
+            return true;
+        }
+
+        public override int GetHashCode(Guid? val)
+        {
+            return val.HasValue ? val.Value.GetHashCode() : 0;
+        }
+    }
+
+    public class ObjectEqualityComparer : EqualityComparer<Object>
+    {
+        public override bool Equals(Object x, Object y)
+        {
+            if (x != null)
+            {
+                if (y != null)
+                {
+                    return x.Equals(y);
+                }
+                return false;
+            }
+            if (y != null)
+            {
+                return false;
+            }
+            return true;
+        }
+
+        public override int GetHashCode(Object val)
+        {
+            return val?.GetHashCode() ?? 0;
+        }
+    }
+
 }