private void ReadReturnTypeSignature(Signature created, byte[] signature, Offset offset)
{
// p.265 of ecma 335
// zero or more custom modifiers can be provided
while (CustomModifierToken.IsToken(signature, offset))
{
created.Tokens.Add(new CustomModifierToken(signature, offset));
}
// byref path
if (ElementTypeSignatureToken.IsToken(signature, offset, ElementTypes.ByRef))
{
created.Tokens.Add(new ElementTypeSignatureToken(signature, offset)); // ByRef
created.Tokens.Add(new TypeSignatureToken(signature, offset)); // Type
}
// typed by ref or void path path
else if (ElementTypeSignatureToken.IsToken(signature, offset, ElementTypes.Void | ElementTypes.TypedByRef))
{
created.Tokens.Add(new ElementTypeSignatureToken(signature, offset)); // Void, TypedByRef
}
// path for byref where byref is not provided
else
{
created.Tokens.Add(new TypeSignatureToken(signature, offset));
}
}
/// <summary>
/// Initialises a new instance of the property signiture from the provided <paramref name="signiture"/>.
/// </summary>
/// <param name="signiture">The signiture blob.</param>
public PropertySignature(byte[] signiture)
: base(Signatures.Property)
{
Offset offset = 0;
ElementTypeSignatureToken property = new ElementTypeSignatureToken(signiture, offset);
Tokens.Add(property);
ParameterCountSignatureToken paramCount = new ParameterCountSignatureToken(signiture, offset);
Tokens.Add(paramCount);
while (CustomModifierToken.IsToken(signiture, offset))
{
CustomModifierToken modifier = new CustomModifierToken(signiture, offset);
Tokens.Add(modifier);
}
ElementTypeSignatureToken type = new ElementTypeSignatureToken(signiture, offset);
Tokens.Add(type);
for (int i = 0; i < paramCount.Count; i++)
{
ParamSignatureToken param = new ParamSignatureToken(signiture, offset);
Tokens.Add(param);
}
}
/// <summary>
/// Initialises a new instance of the ParamSignitureToken class from the provided <paramref name="signiture"/>
/// at the specified <paramref name="offset"/>.
/// </summary>
/// <param name="signiture">The contents of the signiture.</param>
/// <param name="offset">The offset of the current token.</param>
public ParamSignatureToken(byte[] signiture, Offset offset)
: base(SignatureTokens.Param)
{
while (CustomModifierToken.IsToken(signiture, offset))
{
Tokens.Add(new CustomModifierToken(signiture, offset));
HasCustomModifier = true;
}
// After a custom modifier the parameter can be defined as a ByRef, TypedByRef or Type token.
if (ElementTypeSignatureToken.IsToken(signiture, offset, ElementTypes.ByRef))
{
Tokens.Add(new ElementTypeSignatureToken(signiture, offset)); // ByRef
TypeSignatureToken typeSig = new TypeSignatureToken(signiture, offset);
Tokens.Add(typeSig); // Type
_elementType = typeSig.ElementType;
_isTypeSigniture = true;
IsByRef = true;
}
else if (ElementTypeSignatureToken.IsToken(signiture, offset, ElementTypes.TypedByRef))
{
ElementTypeSignatureToken elementSig = new ElementTypeSignatureToken(signiture, offset);
Tokens.Add(elementSig); // Type
_elementType = elementSig;
}
else
{
TypeSignatureToken typeSig = new TypeSignatureToken(signiture, offset);
Tokens.Add(typeSig);
_elementType = typeSig.ElementType;
_isTypeSigniture = true;
}
}
/// <summary>
/// Initialises a new TypeSigniture from the <paramref name="signiture"/> starting at the
/// specified <paramref name="offset"/>.
/// </summary>
/// <param name="signiture">The signiture to parse the type from.</param>
/// <param name="offset">The offset to start reading from.</param>
public TypeSignatureToken(byte[] signiture, Offset offset)
: base(SignatureTokens.Type)
{
ElementTypeSignatureToken type = new ElementTypeSignatureToken(signiture, offset);
TypeSignatureToken childType;
Tokens.Add(type);
ElementType = type;
switch (type.ElementType)
{
case ElementTypes.SZArray:
while (CustomModifierToken.IsToken(signiture, offset))
{
CustomModifierToken modifier = new CustomModifierToken(signiture, offset);
Tokens.Add(modifier);
}
childType = new TypeSignatureToken(signiture, offset);
Tokens.Add(childType);
break;
case ElementTypes.Ptr:
while (CustomModifierToken.IsToken(signiture, offset))
{
CustomModifierToken modifier = new CustomModifierToken(signiture, offset);
Tokens.Add(modifier);
}
childType = new TypeSignatureToken(signiture, offset);
Tokens.Add(childType);
break;
case ElementTypes.GenericInstance:
ElementTypeSignatureToken genericType = new ElementTypeSignatureToken(signiture, offset);
Tokens.Add(genericType);
GenericArgumentCountSignatureToken argCount = new GenericArgumentCountSignatureToken(signiture, offset);
Tokens.Add(argCount);
for (int i = 0; i < argCount.Count; i++)
{
TypeSignatureToken genArgType = new TypeSignatureToken(signiture, offset);
Tokens.Add(genArgType);
}
break;
case ElementTypes.Array:
childType = new TypeSignatureToken(signiture, offset);
Tokens.Add(childType);
Tokens.Add(new ArrayShapeSignatureToken(signiture, offset));
break;
}
}
/// <summary>
/// Initialise a new instance of a local variable signiture from the <paramref name="signiture"/>
/// provided.
/// </summary>
/// <param name="signiture">The signiture blob.</param>
internal LocalVariableSignature(byte[] signiture) : base(Signatures.LocalVariable)
{
Offset offset = 0;
offset.Shift(1); // jump passed the 0x7 indicator
CountSignatureToken count = new CountSignatureToken(signiture, offset);
Tokens.Add(count);
for (int i = 0; i < count.Count; i++)
{
if (ElementTypeSignatureToken.IsToken(signiture, offset, ElementTypes.TypedByRef))
{
ElementTypeSignatureToken typedByRef = new ElementTypeSignatureToken(signiture, offset);
Tokens.Add(typedByRef);
}
else
{
while (CustomModifierToken.IsToken(signiture, offset) || ConstraintSignatureToken.IsToken(signiture, offset))
{
if (CustomModifierToken.IsToken(signiture, offset))
{
CustomModifierToken modifier = new CustomModifierToken(signiture, offset);
Tokens.Add(modifier);
}
else
{
ConstraintSignatureToken constraint = new ConstraintSignatureToken(signiture, offset);
Tokens.Add(constraint);
}
}
ElementTypeSignatureToken byRef = new ElementTypeSignatureToken(signiture, offset);
Tokens.Add(byRef);
ElementTypeSignatureToken type = new ElementTypeSignatureToken(signiture, offset);
Tokens.Add(type);
}
}
}
/// <summary>
/// Initialises a new instance of the ReturnTypeSignitureToken class.
/// </summary>
/// <param name="signiture">The signiture to read.</param>
/// <param name="offset">The offset to start processing at.</param>
public ReturnTypeSignatureToken(byte[] signiture, Offset offset)
: base(SignatureTokens.ReturnType)
{
while (CustomModifierToken.IsToken(signiture, offset))
{
Tokens.Add(new CustomModifierToken(signiture, offset));
}
if (ElementTypeSignatureToken.IsToken(signiture, offset, ElementTypes.ByRef))
{
Tokens.Add(new ElementTypeSignatureToken(signiture, offset)); // ByRef
Tokens.Add(new TypeSignatureToken(signiture, offset)); // Type
}
else if (ElementTypeSignatureToken.IsToken(signiture, offset, ElementTypes.Void | ElementTypes.TypedByRef))
{
Tokens.Add(new ElementTypeSignatureToken(signiture, offset)); // Void, TypedByRef
}
else
{
Tokens.Add(new TypeSignatureToken(signiture, offset));
}
}
/// <summary>
/// Method which performs the actual conversion of a signiture to a cref string.
/// </summary>
/// <param name="sb">The string builder to hold the converted text</param>
/// <param name="assembly">The assembly the current parameter is defined in</param>
/// <param name="param">The parameter definition, required for token resolution</param>
/// <param name="currentToken">The current token to converty</param>
/// <param name="elementType">The type of element the token represents</param>
/// <param name="resolvedType">The resolved type for this token.</param>
private void Convert(StringBuilder sb, AssemblyDef assembly, ParamDef param, SignatureToken currentToken, ElementTypes elementType, TypeRef resolvedType)
{
StringBuilder convertedSigniture = sb;
if (currentToken.TokenType == SignatureTokens.Param)
{
ParamSignatureToken paramToken = currentToken as ParamSignatureToken;
SignatureToken childToken = paramToken.Tokens[paramToken.Tokens.Count - 1];
if (childToken.TokenType == SignatureTokens.Type)
{
currentToken = childToken;
elementType = ((TypeSignatureToken)childToken).ElementType.ElementType;
}
else
{
currentToken = childToken;
elementType = ((ElementTypeSignatureToken)childToken).ElementType;
}
}
TypeSignatureToken typeToken = currentToken as TypeSignatureToken;
ElementTypeSignatureToken elementToken = currentToken as ElementTypeSignatureToken;
switch (elementType)
{
case ElementTypes.Var: ConvertVar(convertedSigniture, typeToken.ElementType.Token, param); break;
case ElementTypes.MVar: ConvertMVar(convertedSigniture, typeToken.ElementType.Token, param); break;
case ElementTypes.SZArray:
// TODO: Fix the custom modifier section
if (typeToken.Tokens[0] is CustomModifierToken)
{
NotImplementedException ex = new NotImplementedException("Custom modifiers are not implemented on SZArray");
ex.Data["token"] = currentToken;
throw ex;
}
ElementTypes szArrayElementType;
if (typeToken.Tokens[1].TokenType == SignatureTokens.Type)
{
szArrayElementType = ((TypeSignatureToken)typeToken.Tokens[1]).ElementType.ElementType;
}
else
{
szArrayElementType = ((ElementTypeSignatureToken)typeToken.Tokens[1]).ElementType;
}
Convert(
sb,
assembly,
param,
typeToken.Tokens[1],
szArrayElementType,
resolvedType);
convertedSigniture.Append("[]");
break;
case ElementTypes.Array:
ArrayShapeSignatureToken shape = typeToken.Tokens.Last() as ArrayShapeSignatureToken;
ConvertArray(convertedSigniture, resolvedType, shape);
break;
case ElementTypes.GenericInstance:
TypeRef genericType = ((ElementTypeSignatureToken)typeToken.Tokens[1]).ResolveToken(assembly);
GetTypeName(convertedSigniture, genericType);
GenericArgumentCountSignatureToken argsCount = typeToken.GetGenericArgumentCount();
bool isFirstArgument = true;
if (argsCount.Count > 0)
{
sb.Append(GenericStart);
for (int j = 0; j < argsCount.Count; j++)
{
if (isFirstArgument)
{
isFirstArgument = false;
}
else
{
sb.Append(",");
}
TypeRef argResolvedType;
ElementTypes elType;
if (typeToken.Tokens[j + 3].TokenType == SignatureTokens.ElementType)
{
ElementTypeSignatureToken gESig = (ElementTypeSignatureToken)typeToken.Tokens[j + 3];
argResolvedType = gESig.ResolveToken(assembly);
elType = gESig.ElementType;
}
else
{
TypeSignatureToken gTSig = (TypeSignatureToken)typeToken.Tokens[j + 3];
argResolvedType = gTSig.ResolveType(assembly, param);
elType = gTSig.ElementType.ElementType;
}
Convert(
sb,
assembly,
param,
typeToken.Tokens[j + 3],
elType,
argResolvedType);
}
sb.Append(GenericEnd);
}
break;
case ElementTypes.Class:
case ElementTypes.ValueType:
case ElementTypes.Char:
case ElementTypes.I:
case ElementTypes.I1:
case ElementTypes.I2:
case ElementTypes.I4:
case ElementTypes.I8:
case ElementTypes.Object:
case ElementTypes.R4:
case ElementTypes.R4_HFA:
case ElementTypes.R8:
case ElementTypes.R8_HFA:
case ElementTypes.String:
case ElementTypes.U:
case ElementTypes.U1:
case ElementTypes.U2:
case ElementTypes.U4:
case ElementTypes.U8:
case ElementTypes.TypedByRef:
case ElementTypes.Boolean:
GetTypeName(convertedSigniture, resolvedType);
break;
case ElementTypes.Ptr:
GetTypeName(convertedSigniture, resolvedType);
convertedSigniture.Append("*");
break;
case ElementTypes.FunctionPointer:
NotImplementedException fnPtrEx = new NotImplementedException("Function Pointer is not implemented yet.");
fnPtrEx.Data["token"] = currentToken;
throw fnPtrEx;
}
}
public TypeDetails GetTypeDetails(ReflectedMember member)
{
TypeDetails details = new TypeDetails();
if (ElementType.ElementType == ElementTypes.SZArray)
{
TypeSignatureToken childType = Tokens.Last() as TypeSignatureToken;
details.ArrayOf = childType.GetTypeDetails(member);
details.IsArray = true;
}
else if (
ElementType.ElementType == ElementTypes.Class ||
ElementType.ElementType == ElementTypes.ValueType
)
{
details.Type = ElementType.ResolveToken(member.Assembly);
}
else if (ElementType.ElementType == ElementTypes.GenericInstance)
{
ElementTypeSignatureToken childType = Tokens[1] as ElementTypeSignatureToken;
details.Type = childType.ResolveToken(member.Assembly);
details.IsGenericInstance = true;
details.GenericParameters = new List <TypeDetails>();
for (int i = 3; i < GetGenericArgumentCount().Count + 3; i++)
{
if (Tokens[i].TokenType == SignatureTokens.Type)
{
details.GenericParameters.Add(
((TypeSignatureToken)Tokens[i]).GetTypeDetails(member)
);
}
else
{
TypeDetails genericParameter = new TypeDetails();
genericParameter.Type = ((ElementTypeSignatureToken)Tokens[i]).ResolveToken(member.Assembly);
details.GenericParameters.Add(genericParameter);
}
}
}
else if (ElementType.ElementType == ElementTypes.Ptr)
{
if (Tokens[1].TokenType == SignatureTokens.Type)
{
TypeSignatureToken childType = Tokens[1] as TypeSignatureToken;
details = childType.GetTypeDetails(member);
}
else
{
ElementTypeSignatureToken childType = Tokens[1] as ElementTypeSignatureToken;
details.Type = childType.ResolveToken(member.Assembly);
}
details.IsPointer = true;
}
else if (ElementType.ElementType == ElementTypes.Array)
{
if (Tokens[1].TokenType == SignatureTokens.Type)
{
TypeSignatureToken childType = Tokens[1] as TypeSignatureToken;
details.ArrayOf = childType.GetTypeDetails(member);
}
else
{
ElementTypeSignatureToken childType = Tokens[1] as ElementTypeSignatureToken;
details.ArrayOf = new TypeDetails();
details.ArrayOf.Type = childType.ResolveToken(member.Assembly);
}
details.IsMultidemensionalArray = true;
details.ArrayShape = (ArrayShapeSignatureToken)Tokens.Find(t => t.TokenType == SignatureTokens.ArrayShape);
}
else if (ElementType.ElementType == ElementTypes.MVar)
{
details.Type = ResolveType(member.Assembly, member);
}
else if (ElementType.ElementType == ElementTypes.Var)
{
details.Type = ResolveType(member.Assembly, member);
}
else if (ElementType.Definition != null)
{
details.Type = ElementType.Definition as TypeRef;
}
return(details);
}
/// <summary>
/// Attempts to resolve the type.
/// </summary>
/// <param name="assembly"></param>
/// <param name="parameter"></param>
/// <returns></returns>
internal TypeRef ResolveType(AssemblyDef assembly, ParamDef parameter)
{
TypeRef type = null;
if (ElementType.ElementType == ElementTypes.SZArray)
{
TypeSignatureToken childType = Tokens.Last() as TypeSignatureToken;
type = childType.ResolveType(assembly, parameter);
}
else if (
ElementType.ElementType == ElementTypes.Class ||
ElementType.ElementType == ElementTypes.ValueType
)
{
type = (TypeRef)assembly.ResolveMetadataToken(ElementType.Token);
}
else if (ElementType.ElementType == ElementTypes.GenericInstance)
{
ElementTypeSignatureToken childType = Tokens[1] as ElementTypeSignatureToken;
type = childType.ResolveToken(assembly);
}
else if (ElementType.ElementType == ElementTypes.Ptr)
{
if (Tokens[1].TokenType == SignatureTokens.Type)
{
TypeSignatureToken childType = Tokens[1] as TypeSignatureToken;
type = childType.ResolveType(assembly, parameter);
}
else
{
ElementTypeSignatureToken childType = Tokens[1] as ElementTypeSignatureToken;
type = childType.ResolveToken(assembly);
}
}
else if (ElementType.ElementType == ElementTypes.Array)
{
if (Tokens[1].TokenType == SignatureTokens.Type)
{
TypeSignatureToken childType = Tokens[1] as TypeSignatureToken;
type = childType.ResolveType(assembly, parameter);
}
else
{
ElementTypeSignatureToken childType = (ElementTypeSignatureToken)this.Tokens[1];
type = childType.ResolveToken(assembly);
}
}
else if (ElementType.ElementType == ElementTypes.MVar)
{
type = parameter.Method.GenericTypes[(int)ElementType.Token];
}
else if (ElementType.ElementType == ElementTypes.Var)
{
List <GenericTypeRef> genericParameters = ((TypeDef)parameter.Method.Type).GenericTypes;
if (genericParameters.Count < ElementType.Token)
{
throw new InvalidOperationException("The generic token refers to a parameter that is not available.");
}
type = genericParameters[(int)ElementType.Token];
}
else if (ElementType.Definition != null)
{
type = ElementType.Definition as TypeRef;
}
return(type);
}
/// <summary>
/// Attempts to resolve the type.
/// </summary>
/// <param name="assembly"></param>
/// <param name="member"></param>
/// <returns></returns>
internal TypeRef ResolveType(AssemblyDef assembly, ReflectedMember member)
{
TypeRef type = null;
if (ElementType.ElementType == ElementTypes.SZArray)
{
TypeSignatureToken childType = (TypeSignatureToken)Tokens.Last();
type = childType.ResolveType(assembly, member);
}
else if (
ElementType.ElementType == ElementTypes.Class ||
ElementType.ElementType == ElementTypes.ValueType
)
{
type = (TypeRef)assembly.ResolveMetadataToken(ElementType.Token);
}
else if (ElementType.ElementType == ElementTypes.GenericInstance)
{
ElementTypeSignatureToken childType = (ElementTypeSignatureToken)Tokens[1];
type = childType.ResolveToken(assembly);
}
else if (ElementType.ElementType == ElementTypes.Ptr)
{
if (Tokens[1].TokenType == SignatureTokens.Type)
{
TypeSignatureToken childType = (TypeSignatureToken)Tokens[1];
type = childType.ResolveType(assembly, member);
}
else
{
ElementTypeSignatureToken childType = (ElementTypeSignatureToken)Tokens[1];
type = childType.ResolveToken(assembly);
}
}
else if (ElementType.ElementType == ElementTypes.Array)
{
if (Tokens[1].TokenType == SignatureTokens.Type)
{
TypeSignatureToken childType = (TypeSignatureToken)Tokens[1];
type = childType.ResolveType(assembly, member);
}
else
{
ElementTypeSignatureToken childType = (ElementTypeSignatureToken)Tokens[1];
type = childType.ResolveToken(assembly);
}
}
else if (ElementType.ElementType == ElementTypes.MVar)
{
MethodDef method = member as MethodDef;
if (method == null)
{
InvalidOperationException ex = new InvalidOperationException(
string.Format(
"A MethodDef was expected for type resolution in the signiture but a {0} was provided.",
member.GetType().ToString()
));
throw ex;
}
type = method.GenericTypes[(int)ElementType.Token];
}
else if (ElementType.ElementType == ElementTypes.Var)
{
// Anything that contains a Type property will do here
TypeDef theType;
if (member is MethodDef)
{
// a method may define its own parameters
theType = (TypeDef)((MethodDef)member).Type;
}
else if (member is PropertyDef)
{
theType = ((PropertyDef)member).OwningType;
}
else if (member is FieldDef)
{
theType = (TypeDef)((FieldDef)member).Type;
}
else if (member is EventDef)
{
theType = ((EventDef)member).Type;
}
else if (member is TypeSpec)
{
theType = ((TypeSpec)member).ImplementingType;
}
else
{
InvalidOperationException ex = new InvalidOperationException(
string.Format(
"A ReflectedMember that is contained by a TypeDef was expected for type resolution in the signiture but a {0} was provided.",
member.GetType().ToString()
));
throw ex;
}
List <GenericTypeRef> genericParameters = theType.GenericTypes;
if (genericParameters.Count < ElementType.Token)
{
throw new InvalidOperationException("The generic token refers to a parameter that is not available.");
}
type = genericParameters[(int)ElementType.Token];
}
else if (ElementType.Definition != null)
{
type = (TypeRef)ElementType.Definition;
}
return(type);
}
