private static bool ImplicitConvertToSingle(TypeCode sourceTypeCode, FleeILGenerator ilg)
{
switch (sourceTypeCode)
{
case TypeCode.Char:
case TypeCode.Byte:
case TypeCode.SByte:
case TypeCode.Int16:
case TypeCode.UInt16:
case TypeCode.Int32:
case TypeCode.Int64:
EmitConvert(ilg, OpCodes.Conv_R4);
break;
case TypeCode.UInt32:
case TypeCode.UInt64:
EmitConvert(ilg, OpCodes.Conv_R_Un);
EmitConvert(ilg, OpCodes.Conv_R4);
break;
case TypeCode.Single:
break;
default:
return(false);
}
return(true);
}
/// <summary>
/// Add a branch from a location to a target label
/// </summary>
/// <param name="ilg"></param>
/// <param name="target"></param>
/// <remarks></remarks>
public void AddBranch(FleeILGenerator ilg, Label target)
{
ILLocation startLoc = new ILLocation(ilg.Length);
BranchInfo bi = new BranchInfo(startLoc, target);
MyBranchInfos.Add(bi);
}
/// <summary>
/// Set the position for a label
/// </summary>
/// <param name="ilg"></param>
/// <param name="target"></param>
/// <remarks></remarks>
public void MarkLabel(FleeILGenerator ilg, Label target)
{
int pos = ilg.Length;
foreach (BranchInfo bi in MyBranchInfos)
{
bi.Mark(target, pos);
}
}
public override void Emit(FleeILGenerator ilg, IServiceProvider services)
{
base.Emit(ilg, services);
MyElement.Emit(ilg, services);
if (MyElement.ResultType.IsValueType == true)
{
EmitValueTypeLoadAddress(ilg, this.ResultType);
}
}
public override void Emit(FleeILGenerator ilg, IServiceProvider services)
{
MyCastExpression.Emit(ilg, services);
Type sourceType = MyCastExpression.ResultType;
Type destType = MyDestType;
this.EmitCast(ilg, sourceType, destType, services);
}
public static void EmitArrayLoad(FleeILGenerator ilg, Type elementType)
{
TypeCode tc = Type.GetTypeCode(elementType);
switch (tc)
{
case TypeCode.Byte:
ilg.Emit(OpCodes.Ldelem_U1);
break;
case TypeCode.SByte:
case TypeCode.Boolean:
ilg.Emit(OpCodes.Ldelem_I1);
break;
case TypeCode.Int16:
ilg.Emit(OpCodes.Ldelem_I2);
break;
case TypeCode.UInt16:
ilg.Emit(OpCodes.Ldelem_U2);
break;
case TypeCode.Int32:
ilg.Emit(OpCodes.Ldelem_I4);
break;
case TypeCode.UInt32:
ilg.Emit(OpCodes.Ldelem_U4);
break;
case TypeCode.Int64:
case TypeCode.UInt64:
ilg.Emit(OpCodes.Ldelem_I8);
break;
case TypeCode.Single:
ilg.Emit(OpCodes.Ldelem_R4);
break;
case TypeCode.Double:
ilg.Emit(OpCodes.Ldelem_R8);
break;
case TypeCode.Object:
case TypeCode.String:
ilg.Emit(OpCodes.Ldelem_Ref);
break;
default:
// Must be a non-primitive value type
ilg.Emit(OpCodes.Ldelema, elementType);
ilg.Emit(OpCodes.Ldobj, elementType);
return;
}
}
public override void Emit(FleeILGenerator ilg, IServiceProvider services)
{
Type resultType = this.ResultType;
MyLeftChild.Emit(ilg, services);
ImplicitConverter.EmitImplicitConvert(MyLeftChild.ResultType, resultType, ilg);
MyRightChild.Emit(ilg, services);
ImplicitConverter.EmitImplicitConvert(MyRightChild.ResultType, resultType, ilg);
ilg.Emit(OpCodes.Xor);
}
protected void EmitOverloadedOperatorCall(MethodInfo method, FleeILGenerator ilg, IServiceProvider services)
{
ParameterInfo[] parameters = method.GetParameters();
ParameterInfo pLeft = parameters[0];
ParameterInfo pRight = parameters[1];
EmitChildWithConvert(MyLeftChild, pLeft.ParameterType, ilg, services);
EmitChildWithConvert(MyRightChild, pRight.ParameterType, ilg, services);
ilg.Emit(OpCodes.Call, method);
}
/// <summary>
/// Determine if a branch from a point to a label will be long
/// </summary>
/// <param name="ilg"></param>
/// <param name="target"></param>
/// <returns></returns>
/// <remarks></remarks>
public bool IsLongBranch(FleeILGenerator ilg, Label target)
{
ILLocation startLoc = new ILLocation(ilg.Length);
BranchInfo bi = new BranchInfo(startLoc, target);
int index = MyBranchInfos.IndexOf(bi);
bi = MyBranchInfos[index];
return(bi.IsLongBranch);
}
private void EmitValueTypeArrayLoad(FleeILGenerator ilg, Type elementType)
{
if (this.NextRequiresAddress == true)
{
ilg.Emit(OpCodes.Ldelema, elementType);
}
else
{
Utility.EmitArrayLoad(ilg, elementType);
}
}
// Emit the load of a constant field. We can't emit a ldsfld/ldfld of a constant so we have to get its value
// and then emit a ldc.
private static void EmitLiteral(FieldInfo fi, FleeILGenerator ilg, IServiceProvider services)
{
object value = fi.GetValue(null);
Type t = value.GetType();
TypeCode code = Type.GetTypeCode(t);
LiteralElement elem = default(LiteralElement);
switch (code)
{
case TypeCode.Char:
case TypeCode.Byte:
case TypeCode.SByte:
case TypeCode.Int16:
case TypeCode.UInt16:
case TypeCode.Int32:
elem = new Int32LiteralElement(System.Convert.ToInt32(value));
break;
case TypeCode.UInt32:
elem = new UInt32LiteralElement((UInt32)value);
break;
case TypeCode.Int64:
elem = new Int64LiteralElement((Int64)value);
break;
case TypeCode.UInt64:
elem = new UInt64LiteralElement((UInt64)value);
break;
case TypeCode.Double:
elem = new DoubleLiteralElement((double)value);
break;
case TypeCode.Single:
elem = new SingleLiteralElement((float)value);
break;
case TypeCode.Boolean:
elem = new BooleanLiteralElement((bool)value);
break;
case TypeCode.String:
elem = new StringLiteralElement((string)value);
break;
default:
elem = null;
Debug.Fail("Unsupported constant type");
break;
}
elem.Emit(ilg, services);
}
private static void EmitReferenceTypeMethodCall(MethodInfo mi, FleeILGenerator ilg)
{
if (mi.IsStatic == true)
{
ilg.Emit(OpCodes.Call, mi);
}
else
{
ilg.Emit(OpCodes.Callvirt, mi);
}
}
public override void Emit(FleeILGenerator ilg, IServiceProvider services)
{
if (MyValue == true)
{
ilg.Emit(OpCodes.Ldc_I4_1);
}
else
{
ilg.Emit(OpCodes.Ldc_I4_0);
}
}
/// <summary>
/// Get a label by a key. Create the label if it is not present.
/// </summary>
/// <param name="key"></param>
/// <param name="ilg"></param>
/// <returns></returns>
/// <remarks></remarks>
public Label GetLabel(object key, FleeILGenerator ilg)
{
Label lbl = default(Label);
if (MyKeyLabelMap.TryGetValue(key, out lbl) == false)
{
lbl = ilg.DefineLabel();
MyKeyLabelMap.Add(key, lbl);
}
return(lbl);
}
private static void EmitSuperShort(Int32 value, FleeILGenerator ilg)
{
OpCode ldcOpcode = default(OpCode);
switch (value)
{
case 0:
ldcOpcode = OpCodes.Ldc_I4_0;
break;
case 1:
ldcOpcode = OpCodes.Ldc_I4_1;
break;
case 2:
ldcOpcode = OpCodes.Ldc_I4_2;
break;
case 3:
ldcOpcode = OpCodes.Ldc_I4_3;
break;
case 4:
ldcOpcode = OpCodes.Ldc_I4_4;
break;
case 5:
ldcOpcode = OpCodes.Ldc_I4_5;
break;
case 6:
ldcOpcode = OpCodes.Ldc_I4_6;
break;
case 7:
ldcOpcode = OpCodes.Ldc_I4_7;
break;
case 8:
ldcOpcode = OpCodes.Ldc_I4_8;
break;
case -1:
ldcOpcode = OpCodes.Ldc_I4_M1;
break;
default:
Debug.Assert(false, "value out of range");
break;
}
ilg.Emit(ldcOpcode);
}
public override void Emit(FleeILGenerator ilg, IServiceProvider services)
{
if (object.ReferenceEquals(MyChild.ResultType, typeof(bool)))
{
this.EmitLogical(ilg, services);
}
else
{
MyChild.Emit(ilg, services);
ilg.Emit(OpCodes.Not);
}
}
private void EmitConditional(FleeILGenerator ilg, IServiceProvider services, BranchManager bm)
{
Label falseLabel = bm.FindLabel("falseLabel");
Label endLabel = bm.FindLabel("endLabel");
// Emit the condition
MyCondition.Emit(ilg, services);
// On false go to the false operand
if (ilg.IsTemp == true)
{
bm.AddBranch(ilg, falseLabel);
ilg.Emit(OpCodes.Brfalse_S, falseLabel);
}
else if (bm.IsLongBranch(ilg, falseLabel) == false)
{
ilg.Emit(OpCodes.Brfalse_S, falseLabel);
}
else
{
ilg.Emit(OpCodes.Brfalse, falseLabel);
}
// Emit the true operand
MyWhenTrue.Emit(ilg, services);
ImplicitConverter.EmitImplicitConvert(MyWhenTrue.ResultType, MyResultType, ilg);
// Jump to end
if (ilg.IsTemp == true)
{
bm.AddBranch(ilg, endLabel);
ilg.Emit(OpCodes.Br_S, endLabel);
}
else if (bm.IsLongBranch(ilg, endLabel) == false)
{
ilg.Emit(OpCodes.Br_S, endLabel);
}
else
{
ilg.Emit(OpCodes.Br, endLabel);
}
bm.MarkLabel(ilg, falseLabel);
ilg.MarkLabel(falseLabel);
// Emit the false operand
MyWhenFalse.Emit(ilg, services);
ImplicitConverter.EmitImplicitConvert(MyWhenFalse.ResultType, MyResultType, ilg);
// Fall through to end
bm.MarkLabel(ilg, endLabel);
ilg.MarkLabel(endLabel);
}
public static void EmitLoadLocalAddress(FleeILGenerator ilg, int index)
{
Debug.Assert(index >= 0, "Invalid index");
if (index <= byte.MaxValue)
{
ilg.Emit(OpCodes.Ldloca_S, (byte)index);
}
else
{
ilg.Emit(OpCodes.Ldloca, index);
}
}
private static bool ImplicitConvertToUInt16(TypeCode sourceTypeCode, FleeILGenerator ilg)
{
switch (sourceTypeCode)
{
case TypeCode.Char:
case TypeCode.Byte:
case TypeCode.UInt16:
return(true);
default:
return(false);
}
}
public override void Emit(FleeILGenerator ilg, IServiceProvider services)
{
base.Emit(ilg, services);
if (this.IsArray == true)
{
this.EmitArrayLoad(ilg, services);
}
else
{
this.EmitIndexer(ilg, services);
}
}
private void EmitCast(FleeILGenerator ilg, Type sourceType, Type destType, IServiceProvider services)
{
MethodInfo explicitOperator = this.GetExplictOverloadedOperator(sourceType, destType);
if (object.ReferenceEquals(sourceType, destType))
{
// Identity cast; do nothing
return;
}
else if ((explicitOperator != null))
{
ilg.Emit(OpCodes.Call, explicitOperator);
}
else if (sourceType.IsEnum == true | destType.IsEnum == true)
{
this.EmitEnumCast(ilg, sourceType, destType, services);
}
else if (ImplicitConverter.EmitImplicitConvert(sourceType, destType, ilg) == true)
{
// Implicit numeric cast; do nothing
return;
}
else if (IsCastableNumericType(sourceType) & IsCastableNumericType(destType))
{
// Explicit numeric cast
EmitExplicitNumericCast(ilg, sourceType, destType, services);
}
else if (sourceType.IsValueType == true)
{
Debug.Assert(destType.IsValueType == false, "expecting reference type");
ilg.Emit(OpCodes.Box, sourceType);
}
else
{
if (destType.IsValueType == true)
{
// Reference type to value type
ilg.Emit(OpCodes.Unbox_Any, destType);
}
else
{
// Reference type to reference type
if (destType.IsAssignableFrom(sourceType) == false)
{
// Only emit cast if it is an explicit cast
ilg.Emit(OpCodes.Castclass, destType);
}
}
}
}
private void EmitOnDemandFunction(ExpressionElement[] elements, FleeILGenerator ilg, IServiceProvider services)
{
// Load the variable collection
EmitLoadVariables(ilg);
// Load the function name
ilg.Emit(OpCodes.Ldstr, MyName);
// Load the arguments array
EmitElementArrayLoad(elements, typeof(object), ilg, services);
// Call the function to get the result
MethodInfo mi = VariableCollection.GetFunctionInvokeMethod(MyOnDemandFunctionReturnType);
this.EmitMethodCall(mi, ilg);
}
public override void Emit(FleeILGenerator ilg, System.IServiceProvider services)
{
int index = ilg.GetTempLocalIndex(typeof(TimeSpan));
Utility.EmitLoadLocalAddress(ilg, index);
LiteralElement.EmitInt64Load(MyValue.Ticks, ilg);
ConstructorInfo ci = typeof(TimeSpan).GetConstructor(new Type[] { typeof(long) });
ilg.Emit(OpCodes.Call, ci);
Utility.EmitLoadLocal(ilg, index);
}
public override void Emit(FleeILGenerator ilg, IServiceProvider services)
{
MyChild.Emit(ilg, services);
ImplicitConverter.EmitImplicitConvert(MyChild.ResultType, MyResultType, ilg);
ExpressionOptions options = services.GetService(typeof(ExpressionOptions)) as ExpressionOptions;
if (options.IsGeneric == false)
{
ImplicitConverter.EmitImplicitConvert(MyResultType, typeof(object), ilg);
}
ilg.Emit(OpCodes.Ret);
}
private void EmitFieldLoad(FieldInfo fi, FleeILGenerator ilg, IServiceProvider services)
{
if (fi.IsLiteral == true)
{
EmitLiteral(fi, ilg, services);
}
else if (this.ResultType.IsValueType == true & this.NextRequiresAddress == true)
{
EmitLdfld(fi, true, ilg);
}
else
{
EmitLdfld(fi, false, ilg);
}
}
private void EmitCollectionIn(FleeILGenerator ilg, IServiceProvider services)
{
// Get the contains method
MethodInfo mi = this.GetCollectionContainsMethod();
ParameterInfo p1 = mi.GetParameters()[0];
// Load the collection
MyTargetCollectionElement.Emit(ilg, services);
// Load the argument
MyOperand.Emit(ilg, services);
// Do an implicit convert if necessary
ImplicitConverter.EmitImplicitConvert(MyOperand.ResultType, p1.ParameterType, ilg);
// Call the contains method
ilg.Emit(OpCodes.Callvirt, mi);
}
public static void EmitInt32Load(Int32 value, FleeILGenerator ilg)
{
if (value >= -1 & value <= 8)
{
EmitSuperShort(value, ilg);
}
else if (value >= sbyte.MinValue & value <= sbyte.MaxValue)
{
ilg.Emit(OpCodes.Ldc_I4_S, (sbyte)value);
}
else
{
ilg.Emit(OpCodes.Ldc_I4, value);
}
}
private static void EmitBranchToTrueTerminal(FleeILGenerator ilg, Label trueTerminal, BranchManager bm)
{
if (ilg.IsTemp == true)
{
bm.AddBranch(ilg, trueTerminal);
ilg.Emit(OpCodes.Brtrue_S, trueTerminal);
}
else if (bm.IsLongBranch(ilg, trueTerminal) == false)
{
ilg.Emit(OpCodes.Brtrue_S, trueTerminal);
}
else
{
ilg.Emit(OpCodes.Brtrue, trueTerminal);
}
}
private void EmitEnumCast(FleeILGenerator ilg, Type sourceType, Type destType, IServiceProvider services)
{
if (destType.IsValueType == false)
{
ilg.Emit(OpCodes.Box, sourceType);
}
else if (sourceType.IsValueType == false)
{
ilg.Emit(OpCodes.Unbox_Any, destType);
}
else
{
sourceType = GetUnderlyingEnumType(sourceType);
destType = GetUnderlyingEnumType(destType);
this.EmitCast(ilg, sourceType, destType, services);
}
}
private void EmitArrayLoad(FleeILGenerator ilg, IServiceProvider services)
{
MyIndexerElement.Emit(ilg, services);
ImplicitConverter.EmitImplicitConvert(MyIndexerElement.ResultType, typeof(Int32), ilg);
Type elementType = this.ResultType;
if (elementType.IsValueType == false)
{
// Simple reference load
ilg.Emit(OpCodes.Ldelem_Ref);
}
else
{
this.EmitValueTypeArrayLoad(ilg, elementType);
}
}