public void Load(MethodEmitter method)
{
if (m_Field != null)
{
method.LoadArgument(0);
method.LoadField(m_Field);
}
else if (m_Value == null)
{
method.LoadNull(m_Type);
}
else
{
if (m_Value is int)
{
method.Load((int)m_Value);
}
else if (m_Value is long)
{
method.Load((long)m_Value);
}
else if (m_Value is float)
{
method.Load((float)m_Value);
}
else if (m_Value is double)
{
method.Load((double)m_Value);
}
else if (m_Value is char)
{
method.Load((char)m_Value);
}
else if (m_Value is bool)
{
method.Load((bool)m_Value);
}
else if (m_Value is string)
{
method.Load((string)m_Value);
}
else if (m_Value is Enum)
{
method.Load((Enum)m_Value);
}
else if (m_Value is uint)
{
method.Load((long)m_Value);
}
else
{
throw new InvalidOperationException("Unrecognized comparison value.");
}
}
}
public void Load(MethodEmitter method)
{
if (Field != null)
{
method.LoadArgument(0);
method.LoadField(Field);
}
else if (Value == null)
{
method.LoadNull(Type);
}
else
{
if (Value is int i)
{
method.Load(i);
}
else if (Value is long l)
{
method.Load(l);
}
else if (Value is float f)
{
method.Load(f);
}
else if (Value is double d)
{
method.Load(d);
}
else if (Value is char c)
{
method.Load(c);
}
else if (Value is bool b)
{
method.Load(b);
}
else if (Value is string s)
{
method.Load(s);
}
else if (Value is Enum e)
{
method.Load(e);
}
else
{
throw new InvalidOperationException("Unrecognized comparison value.");
}
}
}
public void Load(MethodEmitter method)
{
if (m_Field != null)
{
method.LoadArgument(0);
method.LoadField(m_Field);
}
else if (m_Value == null)
{
method.LoadNull(m_Type);
}
else
{
if (m_Value is int i)
{
method.Load(i);
}
else if (m_Value is long lValue)
{
method.Load(lValue);
}
else if (m_Value is float fValue)
{
method.Load(fValue);
}
else if (m_Value is double dValue)
{
method.Load(dValue);
}
else if (m_Value is char cValue)
{
method.Load(cValue);
}
else if (m_Value is bool bValue)
{
method.Load(bValue);
}
else if (m_Value is string sValue)
{
method.Load(sValue);
}
else if (m_Value is Enum eValue)
{
method.Load(eValue);
}
else
{
throw new InvalidOperationException("Unrecognized comparison value.");
}
}
}
public override void Compile(MethodEmitter emitter)
{
emitter.Chain(m_Property);
bool inverse = false;
bool couldCompare =
emitter.CompareTo(1, () => { m_Value.Load(emitter); });
if (couldCompare)
{
emitter.Load(0);
switch (m_Operator)
{
case ComparisonOperator.Equal:
emitter.Compare(OpCodes.Ceq);
break;
case ComparisonOperator.NotEqual:
emitter.Compare(OpCodes.Ceq);
inverse = true;
break;
case ComparisonOperator.Greater:
emitter.Compare(OpCodes.Cgt);
break;
case ComparisonOperator.GreaterEqual:
emitter.Compare(OpCodes.Clt);
inverse = true;
break;
case ComparisonOperator.Lesser:
emitter.Compare(OpCodes.Clt);
break;
case ComparisonOperator.LesserEqual:
emitter.Compare(OpCodes.Cgt);
inverse = true;
break;
default:
throw new InvalidOperationException("Invalid comparison operator.");
}
}
else
{
// This type is -not- comparable
// We can only support == and != operations
m_Value.Load(emitter);
switch (m_Operator)
{
case ComparisonOperator.Equal:
emitter.Compare(OpCodes.Ceq);
break;
case ComparisonOperator.NotEqual:
emitter.Compare(OpCodes.Ceq);
inverse = true;
break;
case ComparisonOperator.Greater:
case ComparisonOperator.GreaterEqual:
case ComparisonOperator.Lesser:
case ComparisonOperator.LesserEqual:
throw new InvalidOperationException("Property does not support relational comparisons.");
default:
throw new InvalidOperationException("Invalid operator.");
}
}
if (m_Not != inverse)
{
emitter.LogicalNot();
}
}
public override void Compile(MethodEmitter emitter)
{
bool inverse = false;
string methodName;
switch (m_Operator)
{
case StringOperator.Equal:
methodName = "Equals";
break;
case StringOperator.NotEqual:
methodName = "Equals";
inverse = true;
break;
case StringOperator.Contains:
methodName = "Contains";
break;
case StringOperator.StartsWith:
methodName = "StartsWith";
break;
case StringOperator.EndsWith:
methodName = "EndsWith";
break;
default:
throw new InvalidOperationException("Invalid string comparison operator.");
}
if (m_IgnoreCase || methodName == "Equals")
{
Type type = m_IgnoreCase ? typeof(InsensitiveStringHelpers) : typeof(string);
emitter.BeginCall(
type.GetMethod(
methodName,
BindingFlags.Public | BindingFlags.Static,
null,
new[]
{
typeof(string),
typeof(string)
},
null));
emitter.Chain(m_Property);
m_Value.Load(emitter);
emitter.FinishCall();
}
else
{
Label notNull = emitter.CreateLabel();
Label moveOn = emitter.CreateLabel();
LocalBuilder temp = emitter.AcquireTemp(m_Property.Type);
emitter.Chain(m_Property);
emitter.StoreLocal(temp);
emitter.LoadLocal(temp);
emitter.BranchIfTrue(notNull);
emitter.Load(false);
emitter.Pop();
emitter.Branch(moveOn);
emitter.MarkLabel(notNull);
emitter.LoadLocal(temp);
emitter.BeginCall(
typeof(string).GetMethod(
methodName,
BindingFlags.Public | BindingFlags.Instance,
null,
new[]
{
typeof(string)
},
null));
m_Value.Load(emitter);
emitter.FinishCall();
emitter.MarkLabel(moveOn);
}
if (m_Not != inverse)
{
emitter.LogicalNot();
}
}
public static IComparer Compile(AssemblyEmitter assembly, Type objectType, OrderInfo[] orders)
{
TypeBuilder typeBuilder = assembly.DefineType(
"__sort",
TypeAttributes.Public,
typeof(object));
#region Constructor
{
ConstructorBuilder ctor = typeBuilder.DefineConstructor(
MethodAttributes.Public,
CallingConventions.Standard,
Type.EmptyTypes);
ILGenerator il = ctor.GetILGenerator();
// : base()
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Call, typeof(object).GetConstructor(Type.EmptyTypes));
// return;
il.Emit(OpCodes.Ret);
}
#endregion
#region IComparer
typeBuilder.AddInterfaceImplementation(typeof(IComparer));
MethodBuilder compareMethod;
#region Compare
{
MethodEmitter emitter = new MethodEmitter(typeBuilder);
emitter.Define(
/* name */ "Compare",
/* attr */ MethodAttributes.Public | MethodAttributes.Virtual,
/* return */ typeof(int),
/* params */ new Type[] { typeof(object), typeof(object) });
LocalBuilder a = emitter.CreateLocal(objectType);
LocalBuilder b = emitter.CreateLocal(objectType);
LocalBuilder v = emitter.CreateLocal(typeof(int));
emitter.LoadArgument(1);
emitter.CastAs(objectType);
emitter.StoreLocal(a);
emitter.LoadArgument(2);
emitter.CastAs(objectType);
emitter.StoreLocal(b);
emitter.Load(0);
emitter.StoreLocal(v);
Label end = emitter.CreateLabel();
for (int i = 0; i < orders.Length; ++i)
{
if (i > 0)
{
emitter.LoadLocal(v);
emitter.BranchIfTrue(end); // if ( v != 0 ) return v;
}
OrderInfo orderInfo = orders[i];
Property prop = orderInfo.Property;
int sign = orderInfo.Sign;
emitter.LoadLocal(a);
emitter.Chain(prop);
bool couldCompare =
emitter.CompareTo(sign, delegate()
{
emitter.LoadLocal(b);
emitter.Chain(prop);
});
if (!couldCompare)
throw new InvalidOperationException("Property is not comparable.");
emitter.StoreLocal(v);
}
emitter.MarkLabel(end);
emitter.LoadLocal(v);
emitter.Return();
typeBuilder.DefineMethodOverride(
emitter.Method,
typeof(IComparer).GetMethod(
"Compare",
new Type[]
{
typeof(object),
typeof(object)
}));
compareMethod = emitter.Method;
}
#endregion
#endregion
Type comparerType = typeBuilder.CreateType();
return (IComparer)Activator.CreateInstance(comparerType);
}
public static IComparer Compile(AssemblyEmitter assembly, Type objectType, Property[] props)
{
TypeBuilder typeBuilder = assembly.DefineType(
"__distinct",
TypeAttributes.Public,
typeof(object)
);
#region Constructor
{
ConstructorBuilder ctor = typeBuilder.DefineConstructor(
MethodAttributes.Public,
CallingConventions.Standard,
Type.EmptyTypes
);
ILGenerator il = ctor.GetILGenerator();
// : base()
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Call, typeof(object).GetConstructor(Type.EmptyTypes));
// return;
il.Emit(OpCodes.Ret);
}
#endregion
#region IComparer
typeBuilder.AddInterfaceImplementation(typeof(IComparer));
MethodBuilder compareMethod;
#region Compare
{
MethodEmitter emitter = new MethodEmitter(typeBuilder);
emitter.Define(
/* name */ "Compare",
/* attr */ MethodAttributes.Public | MethodAttributes.Virtual,
/* return */ typeof(int),
/* params */ new Type[] { typeof(object), typeof(object) });
LocalBuilder a = emitter.CreateLocal(objectType);
LocalBuilder b = emitter.CreateLocal(objectType);
LocalBuilder v = emitter.CreateLocal(typeof(int));
emitter.LoadArgument(1);
emitter.CastAs(objectType);
emitter.StoreLocal(a);
emitter.LoadArgument(2);
emitter.CastAs(objectType);
emitter.StoreLocal(b);
emitter.Load(0);
emitter.StoreLocal(v);
Label end = emitter.CreateLabel();
for (int i = 0; i < props.Length; ++i)
{
if (i > 0)
{
emitter.LoadLocal(v);
emitter.BranchIfTrue(end); // if ( v != 0 ) return v;
}
Property prop = props[i];
emitter.LoadLocal(a);
emitter.Chain(prop);
bool couldCompare =
emitter.CompareTo(1, delegate()
{
emitter.LoadLocal(b);
emitter.Chain(prop);
});
if (!couldCompare)
{
throw new InvalidOperationException("Property is not comparable.");
}
emitter.StoreLocal(v);
}
emitter.MarkLabel(end);
emitter.LoadLocal(v);
emitter.Return();
typeBuilder.DefineMethodOverride(
emitter.Method,
typeof(IComparer).GetMethod(
"Compare",
new Type[]
{
typeof(object),
typeof(object)
}
)
);
compareMethod = emitter.Method;
}
#endregion
#endregion
#region IEqualityComparer
typeBuilder.AddInterfaceImplementation(typeof(IEqualityComparer <object>));
#region Equals
{
MethodEmitter emitter = new MethodEmitter(typeBuilder);
emitter.Define(
/* name */ "Equals",
/* attr */ MethodAttributes.Public | MethodAttributes.Virtual,
/* return */ typeof(bool),
/* params */ new Type[] { typeof(object), typeof(object) });
emitter.Generator.Emit(OpCodes.Ldarg_0);
emitter.Generator.Emit(OpCodes.Ldarg_1);
emitter.Generator.Emit(OpCodes.Ldarg_2);
emitter.Generator.Emit(OpCodes.Call, compareMethod);
emitter.Generator.Emit(OpCodes.Ldc_I4_0);
emitter.Generator.Emit(OpCodes.Ceq);
emitter.Generator.Emit(OpCodes.Ret);
typeBuilder.DefineMethodOverride(
emitter.Method,
typeof(IEqualityComparer <object>).GetMethod(
"Equals",
new Type[]
{
typeof(object),
typeof(object)
}
)
);
}
#endregion
#region GetHashCode
{
MethodEmitter emitter = new MethodEmitter(typeBuilder);
emitter.Define(
/* name */ "GetHashCode",
/* attr */ MethodAttributes.Public | MethodAttributes.Virtual,
/* return */ typeof(int),
/* params */ new Type[] { typeof(object) });
LocalBuilder obj = emitter.CreateLocal(objectType);
emitter.LoadArgument(1);
emitter.CastAs(objectType);
emitter.StoreLocal(obj);
for (int i = 0; i < props.Length; ++i)
{
Property prop = props[i];
emitter.LoadLocal(obj);
emitter.Chain(prop);
Type active = emitter.Active;
MethodInfo getHashCode = active.GetMethod("GetHashCode", Type.EmptyTypes);
if (getHashCode == null)
{
getHashCode = typeof(object).GetMethod("GetHashCode", Type.EmptyTypes);
}
if (active != typeof(int))
{
if (!active.IsValueType)
{
LocalBuilder value = emitter.AcquireTemp(active);
Label valueNotNull = emitter.CreateLabel();
Label done = emitter.CreateLabel();
emitter.StoreLocal(value);
emitter.LoadLocal(value);
emitter.BranchIfTrue(valueNotNull);
emitter.Load(0);
emitter.Pop(typeof(int));
emitter.Branch(done);
emitter.MarkLabel(valueNotNull);
emitter.LoadLocal(value);
emitter.Call(getHashCode);
emitter.ReleaseTemp(value);
emitter.MarkLabel(done);
}
else
{
emitter.Call(getHashCode);
}
}
if (i > 0)
{
emitter.Xor();
}
}
emitter.Return();
typeBuilder.DefineMethodOverride(
emitter.Method,
typeof(IEqualityComparer <object>).GetMethod(
"GetHashCode",
new Type[]
{
typeof(object)
}
)
);
}
#endregion
#endregion
Type comparerType = typeBuilder.CreateType();
return((IComparer)Activator.CreateInstance(comparerType));
}
public static IComparer Compile(AssemblyEmitter assembly, Type objectType, OrderInfo[] orders)
{
TypeBuilder typeBuilder = assembly.DefineType(
"__sort",
TypeAttributes.Public,
typeof(object));
#region Constructor
{
ConstructorBuilder ctor = typeBuilder.DefineConstructor(
MethodAttributes.Public,
CallingConventions.Standard,
Type.EmptyTypes);
ILGenerator il = ctor.GetILGenerator();
// : base()
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Call, typeof(object).GetConstructor(Type.EmptyTypes));
// return;
il.Emit(OpCodes.Ret);
}
#endregion
#region IComparer
typeBuilder.AddInterfaceImplementation(typeof(IComparer));
MethodBuilder compareMethod;
#region Compare
{
MethodEmitter emitter = new MethodEmitter(typeBuilder);
emitter.Define(
/* name */ "Compare",
/* attr */ MethodAttributes.Public | MethodAttributes.Virtual,
/* return */ typeof(int),
/* params */ new Type[] { typeof(object), typeof(object) });
LocalBuilder a = emitter.CreateLocal(objectType);
LocalBuilder b = emitter.CreateLocal(objectType);
LocalBuilder v = emitter.CreateLocal(typeof(int));
emitter.LoadArgument(1);
emitter.CastAs(objectType);
emitter.StoreLocal(a);
emitter.LoadArgument(2);
emitter.CastAs(objectType);
emitter.StoreLocal(b);
emitter.Load(0);
emitter.StoreLocal(v);
Label end = emitter.CreateLabel();
for (int i = 0; i < orders.Length; ++i)
{
if (i > 0)
{
emitter.LoadLocal(v);
emitter.BranchIfTrue(end); // if ( v != 0 ) return v;
}
OrderInfo orderInfo = orders[i];
Property prop = orderInfo.Property;
int sign = orderInfo.Sign;
emitter.LoadLocal(a);
emitter.Chain(prop);
bool couldCompare =
emitter.CompareTo(sign, delegate()
{
emitter.LoadLocal(b);
emitter.Chain(prop);
});
if (!couldCompare)
{
throw new InvalidOperationException("Property is not comparable.");
}
emitter.StoreLocal(v);
}
emitter.MarkLabel(end);
emitter.LoadLocal(v);
emitter.Return();
typeBuilder.DefineMethodOverride(
emitter.Method,
typeof(IComparer).GetMethod(
"Compare",
new Type[]
{
typeof(object),
typeof(object)
}));
compareMethod = emitter.Method;
}
#endregion
#endregion
Type comparerType = typeBuilder.CreateType();
return((IComparer)Activator.CreateInstance(comparerType));
}
public static IComparer <T> Compile <T>(AssemblyEmitter assembly, Type objectType, Property[] props)
{
var typeBuilder = assembly.DefineType(
"__distinct",
TypeAttributes.Public,
typeof(object)
);
{
var ctor = typeBuilder.DefineConstructor(
MethodAttributes.Public,
CallingConventions.Standard,
Type.EmptyTypes
);
var il = ctor.GetILGenerator();
// : base()
il.Emit(OpCodes.Ldarg_0);
il.Emit(
OpCodes.Call,
typeof(T).GetConstructor(Type.EmptyTypes) ??
throw new Exception($"Could not find empty constructor for type {typeof(T).FullName}")
);
// return;
il.Emit(OpCodes.Ret);
}
typeBuilder.AddInterfaceImplementation(typeof(IComparer <T>));
MethodBuilder compareMethod;
{
var emitter = new MethodEmitter(typeBuilder);
emitter.Define(
/* name */ "Compare",
/* attr */
MethodAttributes.Public | MethodAttributes.Virtual,
/* return */
typeof(int),
/* params */
new[] { typeof(T), typeof(T) }
);
var a = emitter.CreateLocal(objectType);
var b = emitter.CreateLocal(objectType);
var v = emitter.CreateLocal(typeof(int));
emitter.LoadArgument(1);
emitter.CastAs(objectType);
emitter.StoreLocal(a);
emitter.LoadArgument(2);
emitter.CastAs(objectType);
emitter.StoreLocal(b);
emitter.Load(0);
emitter.StoreLocal(v);
var end = emitter.CreateLabel();
for (var i = 0; i < props.Length; ++i)
{
if (i > 0)
{
emitter.LoadLocal(v);
emitter.BranchIfTrue(end);
}
var prop = props[i];
emitter.LoadLocal(a);
emitter.Chain(prop);
var couldCompare =
emitter.CompareTo(
1,
() =>
{
emitter.LoadLocal(b);
emitter.Chain(prop);
}
);
if (!couldCompare)
{
throw new InvalidOperationException("Property is not comparable.");
}
emitter.StoreLocal(v);
}
emitter.MarkLabel(end);
emitter.LoadLocal(v);
emitter.Return();
typeBuilder.DefineMethodOverride(
emitter.Method,
typeof(IComparer <T>).GetMethod(
"Compare",
new[]
{
typeof(T),
typeof(T)
}
) ?? throw new Exception($"No Compare method found for type {typeof(T).FullName}")
);
compareMethod = emitter.Method;
}
typeBuilder.AddInterfaceImplementation(typeof(IEqualityComparer <T>));
{
var emitter = new MethodEmitter(typeBuilder);
emitter.Define(
/* name */ "Equals",
/* attr */
MethodAttributes.Public | MethodAttributes.Virtual,
/* return */
typeof(bool),
/* params */
new[] { typeof(T), typeof(T) }
);
emitter.Generator.Emit(OpCodes.Ldarg_0);
emitter.Generator.Emit(OpCodes.Ldarg_1);
emitter.Generator.Emit(OpCodes.Ldarg_2);
emitter.Generator.Emit(OpCodes.Call, compareMethod);
emitter.Generator.Emit(OpCodes.Ldc_I4_0);
emitter.Generator.Emit(OpCodes.Ceq);
emitter.Generator.Emit(OpCodes.Ret);
typeBuilder.DefineMethodOverride(
emitter.Method,
typeof(IEqualityComparer <T>).GetMethod(
"Equals",
new[]
{
typeof(T),
typeof(T)
}
) ?? throw new Exception($"No Equals method found for type {typeof(T).FullName}")
);
}
{
var emitter = new MethodEmitter(typeBuilder);
emitter.Define(
/* name */ "GetHashCode",
/* attr */
MethodAttributes.Public | MethodAttributes.Virtual,
/* return */
typeof(int),
/* params */
new[] { typeof(T) }
);
var obj = emitter.CreateLocal(objectType);
emitter.LoadArgument(1);
emitter.CastAs(objectType);
emitter.StoreLocal(obj);
for (var i = 0; i < props.Length; ++i)
{
var prop = props[i];
emitter.LoadLocal(obj);
emitter.Chain(prop);
var active = emitter.Active;
var getHashCode = active.GetMethod("GetHashCode", Type.EmptyTypes);
getHashCode ??= typeof(T).GetMethod("GetHashCode", Type.EmptyTypes);
if (active != typeof(int))
{
if (!active.IsValueType)
{
var value = emitter.AcquireTemp(active);
var valueNotNull = emitter.CreateLabel();
var done = emitter.CreateLabel();
emitter.StoreLocal(value);
emitter.LoadLocal(value);
emitter.BranchIfTrue(valueNotNull);
emitter.Load(0);
emitter.Pop(typeof(int));
emitter.Branch(done);
emitter.MarkLabel(valueNotNull);
emitter.LoadLocal(value);
emitter.Call(getHashCode);
emitter.ReleaseTemp(value);
emitter.MarkLabel(done);
}
else
{
emitter.Call(getHashCode);
}
}
if (i > 0)
{
emitter.Xor();
}
}
emitter.Return();
typeBuilder.DefineMethodOverride(
emitter.Method,
typeof(IEqualityComparer <T>).GetMethod(
"GetHashCode",
new[]
{
typeof(T)
}
) ?? throw new Exception($"No GetHashCode method found for type {typeof(T).FullName}")
);
}
var comparerType = typeBuilder.CreateType();
return(comparerType.CreateInstance <IComparer <T> >());
}
public void Load( MethodEmitter method )
{
if ( m_Field != null )
{
method.LoadArgument( 0 );
method.LoadField( m_Field );
}
else if ( m_Value == null )
{
method.LoadNull( m_Type );
}
else
{
if ( m_Value is int )
method.Load( (int) m_Value );
else if ( m_Value is long )
method.Load( (long) m_Value );
else if ( m_Value is float )
method.Load( (float) m_Value );
else if ( m_Value is double )
method.Load( (double) m_Value );
else if ( m_Value is char )
method.Load( (char) m_Value );
else if ( m_Value is bool )
method.Load( (bool) m_Value );
else if ( m_Value is string )
method.Load( (string) m_Value );
else if ( m_Value is Enum )
method.Load( (Enum) m_Value );
else
throw new InvalidOperationException( "Unrecognized comparison value." );
}
}
public override void Compile( MethodEmitter emitter )
{
emitter.Chain( m_Property );
bool inverse = false;
bool couldCompare =
emitter.CompareTo( 1, delegate()
{
m_Value.Load( emitter );
} );
if ( couldCompare )
{
emitter.Load( 0 );
switch ( m_Operator )
{
case ComparisonOperator.Equal:
emitter.Compare( OpCodes.Ceq );
break;
case ComparisonOperator.NotEqual:
emitter.Compare( OpCodes.Ceq );
inverse = true;
break;
case ComparisonOperator.Greater:
emitter.Compare( OpCodes.Cgt );
break;
case ComparisonOperator.GreaterEqual:
emitter.Compare( OpCodes.Clt );
inverse = true;
break;
case ComparisonOperator.Lesser:
emitter.Compare( OpCodes.Clt );
break;
case ComparisonOperator.LesserEqual:
emitter.Compare( OpCodes.Cgt );
inverse = true;
break;
default:
throw new InvalidOperationException( "Invalid comparison operator." );
}
}
else
{
// This type is -not- comparable
// We can only support == and != operations
m_Value.Load( emitter );
switch ( m_Operator )
{
case ComparisonOperator.Equal:
emitter.Compare( OpCodes.Ceq );
break;
case ComparisonOperator.NotEqual:
emitter.Compare( OpCodes.Ceq );
inverse = true;
break;
case ComparisonOperator.Greater:
case ComparisonOperator.GreaterEqual:
case ComparisonOperator.Lesser:
case ComparisonOperator.LesserEqual:
throw new InvalidOperationException( "Property does not support relational comparisons." );
default:
throw new InvalidOperationException( "Invalid operator." );
}
}
if ( m_Not != inverse )
emitter.LogicalNot();
}
public override void Compile( MethodEmitter emitter )
{
bool inverse = false;
string methodName;
switch ( m_Operator )
{
case StringOperator.Equal:
methodName = "Equals";
break;
case StringOperator.NotEqual:
methodName = "Equals";
inverse = true;
break;
case StringOperator.Contains:
methodName = "Contains";
break;
case StringOperator.StartsWith:
methodName = "StartsWith";
break;
case StringOperator.EndsWith:
methodName = "EndsWith";
break;
default:
throw new InvalidOperationException( "Invalid string comparison operator." );
}
if ( m_IgnoreCase || methodName == "Equals" )
{
Type type = ( m_IgnoreCase ? typeof( Insensitive ) : typeof( String ) );
emitter.BeginCall(
type.GetMethod(
methodName,
BindingFlags.Public | BindingFlags.Static,
null,
new Type[]
{
typeof( string ),
typeof( string )
},
null
)
);
emitter.Chain( m_Property );
m_Value.Load( emitter );
emitter.FinishCall();
}
else
{
Label notNull = emitter.CreateLabel();
Label moveOn = emitter.CreateLabel();
LocalBuilder temp = emitter.AcquireTemp( m_Property.Type );
emitter.Chain( m_Property );
emitter.StoreLocal( temp );
emitter.LoadLocal( temp );
emitter.BranchIfTrue( notNull );
emitter.Load( false );
emitter.Pop();
emitter.Branch( moveOn );
emitter.MarkLabel( notNull );
emitter.LoadLocal( temp );
emitter.BeginCall(
typeof( string ).GetMethod(
methodName,
BindingFlags.Public | BindingFlags.Instance,
null,
new Type[]
{
typeof( string )
},
null
)
);
m_Value.Load( emitter );
emitter.FinishCall();
emitter.MarkLabel( moveOn );
}
if ( m_Not != inverse )
emitter.LogicalNot();
}
public static IComparer Compile(AssemblyEmitter assembly, Type objectType, Property[] props)
{
TypeBuilder typeBuilder = assembly.DefineType(
"__distinct",
TypeAttributes.Public,
typeof(object));
#region Constructor
{
ConstructorBuilder ctor = typeBuilder.DefineConstructor(
MethodAttributes.Public,
CallingConventions.Standard,
Type.EmptyTypes);
ILGenerator il = ctor.GetILGenerator();
// : base()
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Call, typeof(object).GetConstructor(Type.EmptyTypes));
// return;
il.Emit(OpCodes.Ret);
}
#endregion
#region IComparer
typeBuilder.AddInterfaceImplementation(typeof(IComparer));
MethodBuilder compareMethod;
#region Compare
{
MethodEmitter emitter = new MethodEmitter(typeBuilder);
emitter.Define(
/* name */ "Compare",
/* attr */ MethodAttributes.Public | MethodAttributes.Virtual,
/* return */ typeof(int),
/* params */ new Type[] { typeof(object), typeof(object) });
LocalBuilder a = emitter.CreateLocal(objectType);
LocalBuilder b = emitter.CreateLocal(objectType);
LocalBuilder v = emitter.CreateLocal(typeof(int));
emitter.LoadArgument(1);
emitter.CastAs(objectType);
emitter.StoreLocal(a);
emitter.LoadArgument(2);
emitter.CastAs(objectType);
emitter.StoreLocal(b);
emitter.Load(0);
emitter.StoreLocal(v);
Label end = emitter.CreateLabel();
for (int i = 0; i < props.Length; ++i)
{
if (i > 0)
{
emitter.LoadLocal(v);
emitter.BranchIfTrue(end); // if ( v != 0 ) return v;
}
Property prop = props[i];
emitter.LoadLocal(a);
emitter.Chain(prop);
bool couldCompare =
emitter.CompareTo(1, delegate()
{
emitter.LoadLocal(b);
emitter.Chain(prop);
});
if (!couldCompare)
throw new InvalidOperationException("Property is not comparable.");
emitter.StoreLocal(v);
}
emitter.MarkLabel(end);
emitter.LoadLocal(v);
emitter.Return();
typeBuilder.DefineMethodOverride(
emitter.Method,
typeof(IComparer).GetMethod(
"Compare",
new Type[]
{
typeof(object),
typeof(object)
}));
compareMethod = emitter.Method;
}
#endregion
#endregion
#region IEqualityComparer
typeBuilder.AddInterfaceImplementation(typeof(IEqualityComparer<object>));
#region Equals
{
MethodEmitter emitter = new MethodEmitter(typeBuilder);
emitter.Define(
/* name */ "Equals",
/* attr */ MethodAttributes.Public | MethodAttributes.Virtual,
/* return */ typeof(bool),
/* params */ new Type[] { typeof(object), typeof(object) });
emitter.Generator.Emit(OpCodes.Ldarg_0);
emitter.Generator.Emit(OpCodes.Ldarg_1);
emitter.Generator.Emit(OpCodes.Ldarg_2);
emitter.Generator.Emit(OpCodes.Call, compareMethod);
emitter.Generator.Emit(OpCodes.Ldc_I4_0);
emitter.Generator.Emit(OpCodes.Ceq);
emitter.Generator.Emit(OpCodes.Ret);
typeBuilder.DefineMethodOverride(
emitter.Method,
typeof(IEqualityComparer<object>).GetMethod(
"Equals",
new Type[]
{
typeof(object),
typeof(object)
}));
}
#endregion
#region GetHashCode
{
MethodEmitter emitter = new MethodEmitter(typeBuilder);
emitter.Define(
/* name */ "GetHashCode",
/* attr */ MethodAttributes.Public | MethodAttributes.Virtual,
/* return */ typeof(int),
/* params */ new Type[] { typeof(object) });
LocalBuilder obj = emitter.CreateLocal(objectType);
emitter.LoadArgument(1);
emitter.CastAs(objectType);
emitter.StoreLocal(obj);
for (int i = 0; i < props.Length; ++i)
{
Property prop = props[i];
emitter.LoadLocal(obj);
emitter.Chain(prop);
Type active = emitter.Active;
MethodInfo getHashCode = active.GetMethod("GetHashCode", Type.EmptyTypes);
if (getHashCode == null)
getHashCode = typeof(object).GetMethod("GetHashCode", Type.EmptyTypes);
if (active != typeof(int))
{
if (!active.IsValueType)
{
LocalBuilder value = emitter.AcquireTemp(active);
Label valueNotNull = emitter.CreateLabel();
Label done = emitter.CreateLabel();
emitter.StoreLocal(value);
emitter.LoadLocal(value);
emitter.BranchIfTrue(valueNotNull);
emitter.Load(0);
emitter.Pop(typeof(int));
emitter.Branch(done);
emitter.MarkLabel(valueNotNull);
emitter.LoadLocal(value);
emitter.Call(getHashCode);
emitter.ReleaseTemp(value);
emitter.MarkLabel(done);
}
else
{
emitter.Call(getHashCode);
}
}
if (i > 0)
emitter.Xor();
}
emitter.Return();
typeBuilder.DefineMethodOverride(
emitter.Method,
typeof(IEqualityComparer<object>).GetMethod(
"GetHashCode",
new Type[]
{
typeof(object)
}));
}
#endregion
#endregion
Type comparerType = typeBuilder.CreateType();
return (IComparer)Activator.CreateInstance(comparerType);
}