private static void RewriteConstantString(ScopedProcessor processor, TypeDefinition enumTypeDefinition, Instruction loadTokenInstruction, Instruction getTypeFromHandleInstruction, Instruction loadStrInstruction, Instruction isDefinedInstruction)
{
var name = (string)loadStrInstruction.Operand;
var constExpr = enumTypeDefinition.Fields.Skip(1).Any(x => x.Name == name);
processor
.Remove(loadTokenInstruction)
.Remove(getTypeFromHandleInstruction)
.Remove(loadStrInstruction)
.Replace(isDefinedInstruction, InstructionUtility.LoadConstant(constExpr));
}
public static ILProcessor Sub(this ILProcessor processor, long value)
{
if (value == 0L)
{
return(processor);
}
if (value < 0L && value >= -7L)
{
return(processor.AddRange(InstructionUtility.LoadConstant(-value)).Add());
}
return(processor.AddRange(InstructionUtility.LoadConstant(value)).Sub());
}
public static ILProcessor Sub(this ILProcessor processor, int value)
{
if (value == 0)
{
return(processor);
}
if (value < 0 && value >= -7)
{
return(processor.Add(InstructionUtility.LoadConstant(-value)).Add());
}
return(processor.Add(InstructionUtility.LoadConstant(value)).Sub());
}
private static Instruction[] InitializeArrayInstructions(ModuleDefinition moduleDefinition, TypeDefinition enumTypeDefinition, ModuleDefinition systemModuleDefinition, int count)
{
var privateImplementationDetails = moduleDefinition.GetOrCreatePrivateImplementationDetails(systemModuleDefinition);
var dataFieldDefinition = moduleDefinition.GetOrCreateEnumValues(privateImplementationDetails, systemModuleDefinition, enumTypeDefinition);
var initializeArrayMethodDefinition = systemModuleDefinition.GetRuntimeHelpers_InitializeArray();
return(new[]
{
InstructionUtility.LoadConstant(count),
Instruction.Create(OpCodes.Newarr, moduleDefinition.ImportReference(enumTypeDefinition)),
Instruction.Create(OpCodes.Dup),
Instruction.Create(OpCodes.Ldtoken, moduleDefinition.ImportReference(dataFieldDefinition)),
Instruction.Create(OpCodes.Call, moduleDefinition.ImportReference(initializeArrayMethodDefinition)),
});
}
public static ILProcessor LdC <T>(this ILProcessor processor, T value) where T : unmanaged
{
if (typeof(T) == typeof(byte))
{
return(processor.Add(InstructionUtility.LoadConstant((sbyte)*(byte *)&value)));
}
if (typeof(T) == typeof(sbyte))
{
return(processor.Add(InstructionUtility.LoadConstant(*(sbyte *)&value)));
}
if (typeof(T) == typeof(short))
{
return(processor.Add(InstructionUtility.LoadConstant(*(short *)&value)));
}
if (typeof(T) == typeof(ushort))
{
return(processor.Add(InstructionUtility.LoadConstant(*(ushort *)&value)));
}
if (typeof(T) == typeof(int))
{
return(processor.Add(InstructionUtility.LoadConstant(*(int *)&value)));
}
if (typeof(T) == typeof(uint))
{
return(processor.Add(InstructionUtility.LoadConstant(*(int *)&value)));
}
if (typeof(T) == typeof(long))
{
return(processor.AddRange(InstructionUtility.LoadConstant(*(long *)&value)));
}
if (typeof(T) == typeof(ulong))
{
return(processor.AddRange(InstructionUtility.LoadConstant(*(long *)&value)));
}
if (typeof(T) == typeof(float))
{
return(processor.Add(InstructionUtility.LoadConstant(*(float *)&value)));
}
if (typeof(T) == typeof(double))
{
return(processor.Add(InstructionUtility.LoadConstant(*(double *)&value)));
}
if (typeof(T) == typeof(bool))
{
return(processor.Add(InstructionUtility.LoadConstant(*(bool *)&value)));
}
throw new ArgumentException("Type mismatch!" + typeof(T).Name);
}
private static void TryRewriteLoadInt64ConstantWhenBaseInt64(Instruction loadNumberInstruction, TypeDefinition enumTypeDefinition, string enumBaseTypeName, ScopedProcessor processor, Instruction loadTokenInstruction, Instruction getTypeFromHandleInstruction)
{
var boxInstruction = loadNumberInstruction.Next;
if (!IsValidBoxInstruction(boxInstruction, enumTypeDefinition, enumBaseTypeName))
{
return;
}
var isDefinedInstruction = boxInstruction.Next;
if (!IsValidIsDefinedInstruction(isDefinedInstruction))
{
return;
}
var number = (long)loadNumberInstruction.Operand;
bool answer;
switch (enumBaseTypeName)
{
case "Int64":
answer = enumTypeDefinition.Fields.Skip(1).Any(x => (long)x.Constant == number);
break;
case "UInt64":
answer = enumTypeDefinition.Fields.Skip(1).Any(x => (ulong)x.Constant == (ulong)number);
break;
default: throw new ArgumentOutOfRangeException(enumBaseTypeName);
}
processor
.Remove(loadTokenInstruction)
.Remove(getTypeFromHandleInstruction)
.Remove(loadNumberInstruction)
.Remove(boxInstruction)
.Replace(isDefinedInstruction, InstructionUtility.LoadConstant(answer));
}
private static void TryRewriteLoadInt64ConstantWhenBaseInt32(Instruction loadNumberInstruction, TypeDefinition enumTypeDefinition, string enumBaseTypeName, ScopedProcessor processor, Instruction loadTokenInstruction, Instruction getTypeFromHandleInstruction)
{
var convInstruction = loadNumberInstruction.Next;
if (convInstruction is null)
{
return;
}
switch (convInstruction.OpCode.Code)
{
case Code.Conv_I1:
case Code.Conv_I2:
case Code.Conv_I4:
case Code.Conv_U1:
case Code.Conv_U2:
case Code.Conv_U4:
break;
default:
return;
}
var boxInstruction = convInstruction.Next;
if (!IsValidBoxInstruction(boxInstruction, enumTypeDefinition, enumBaseTypeName))
{
return;
}
var isDefinedInstruction = boxInstruction.Next;
if (!IsValidIsDefinedInstruction(isDefinedInstruction))
{
return;
}
var number = (long)loadNumberInstruction.Operand;
bool answer;
switch (enumBaseTypeName)
{
case "Byte":
answer = enumTypeDefinition.Fields.Skip(1).Any(x => (byte)x.Constant == number);
break;
case "SByte":
answer = enumTypeDefinition.Fields.Skip(1).Any(x => (sbyte)x.Constant == number);
break;
case "Int16":
answer = enumTypeDefinition.Fields.Skip(1).Any(x => (short)x.Constant == number);
break;
case "UInt16":
answer = enumTypeDefinition.Fields.Skip(1).Any(x => (ushort)x.Constant == number);
break;
case "Int32":
answer = enumTypeDefinition.Fields.Skip(1).Any(x => (int)x.Constant == number);
break;
case "UInt32":
answer = enumTypeDefinition.Fields.Skip(1).Any(x => (uint)x.Constant == number);
break;
default: throw new ArgumentException(enumBaseTypeName);
}
processor
.Remove(loadTokenInstruction)
.Remove(getTypeFromHandleInstruction)
.Remove(loadNumberInstruction)
.Remove(convInstruction)
.Remove(boxInstruction)
.Replace(isDefinedInstruction, InstructionUtility.LoadConstant(answer));
}