/// <summary>
/// Factory method for creating new Signatures.
/// </summary>
/// <param name="source">The contents of the library the signiture is being read from</param>
/// <param name="offset">The offset to the start of the signiture</param>
/// <param name="tokenType">The type of signiture being read.</param>
/// <returns></returns>
public static Signature Create(byte[] source, Offset offset, Signatures tokenType)
{
int startingOffset = offset;
uint lengthOfSigniture = SignatureToken.GetCompressedValue(source, offset); // The first byte is always the length
// Read the full signiture
byte[] signiture = new byte[lengthOfSigniture];
for (int i = 0; i < lengthOfSigniture; i++)
{
signiture[i] = source[offset.Shift(1)];
}
// Instatiate the correct signiture reader and pass control
Signature instantiatedSigniture = null;
switch (tokenType)
{
case Signatures.CustomAttribute: // instantiatedSigniture = new CustomAttributeSigniture(signiture); break;
case Signatures.MethodSpecification: // to do: implement
break;
case Signatures.LocalVariable: instantiatedSigniture = new LocalVariableSignature(signiture); break;
case Signatures.MethodDef: instantiatedSigniture = new MethodDefSignature(signiture); break;
case Signatures.MethodRef: instantiatedSigniture = new MethodRefSignature(signiture); break;
case Signatures.Field: instantiatedSigniture = new FieldSignature(signiture); break;
case Signatures.Property: instantiatedSigniture = new PropertySignature(signiture); break;
case Signatures.TypeSpecification: instantiatedSigniture = new TypeSpecificationSignature(signiture); break;
}
return(instantiatedSigniture);
}
/// <summary>
/// Instantiates a new instance of the ElementTypeSignitureToken class.
/// </summary>
/// <include file='code-documentation\signatures.xml' path='docs/elementtypesignaturetoken/member[@name="ctor"]/*'/>
public ElementTypeSignatureToken(byte[] signiture, Offset offset)
: base(SignatureTokens.ElementType)
{
ElementType = (ElementTypes)GetCompressedValue(signiture, offset);
switch (ElementType)
{
case ElementTypes.Class:
case ElementTypes.ValueType:
DecodeEncodedDefRefSpecToken(signiture, offset);
break;
case ElementTypes.MVar:
case ElementTypes.Var:
Token = SignatureToken.GetCompressedValue(signiture, offset);
break;
// Well known types
case ElementTypes.Boolean: Definition = WellKnownTypeDef.Boolean; break;
case ElementTypes.I: Definition = WellKnownTypeDef.I; break;
case ElementTypes.I1: Definition = WellKnownTypeDef.I1; break;
case ElementTypes.I2: Definition = WellKnownTypeDef.I2; break;
case ElementTypes.I4: Definition = WellKnownTypeDef.I4; break;
case ElementTypes.I8: Definition = WellKnownTypeDef.I8; break;
case ElementTypes.U: Definition = WellKnownTypeDef.U; break;
case ElementTypes.U1: Definition = WellKnownTypeDef.U1; break;
case ElementTypes.U2: Definition = WellKnownTypeDef.U2; break;
case ElementTypes.U4: Definition = WellKnownTypeDef.U4; break;
case ElementTypes.U8: Definition = WellKnownTypeDef.U8; break;
case ElementTypes.Char: Definition = WellKnownTypeDef.Char; break;
case ElementTypes.R4: Definition = WellKnownTypeDef.R4; break;
case ElementTypes.R8: Definition = WellKnownTypeDef.R8; break;
case ElementTypes.TypedByRef: Definition = WellKnownTypeDef.TypedByRef; break;
case ElementTypes.String: Definition = WellKnownTypeDef.String; break;
case ElementTypes.Object: Definition = WellKnownTypeDef.Object; break;
case ElementTypes.Void: Definition = WellKnownTypeDef.Void; break;
}
}
internal TypeRef ResolveType(AssemblyDef assembly, ReflectedMember member)
{
SignatureToken token = Tokens.Last();
if (token is TypeSignatureToken)
{
return(((TypeSignatureToken)token).ResolveType(assembly, member));
}
else
{
return(((ElementTypeSignatureToken)token).ResolveToken(assembly));
}
}
public TypeDetails GetTypeDetails(ReflectedMember member)
{
TypeDetails details = new TypeDetails();
SignatureToken token = Tokens.Last();
if (token is TypeSignatureToken)
{
details = ((TypeSignatureToken)token).GetTypeDetails(member);
}
else
{
details.Type = ((ElementTypeSignatureToken)token).ResolveToken(member.Assembly);
}
return(details);
}
/// <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;
}
}
/// <summary>
/// Instantiates a new instance of the ElementTypeSignitureToken class.
/// </summary>
/// <param name="signiture">The signiture where this token is defined.</param>
/// <param name="offset">The current offset in the signiture to read the token.</param>
/// <remarks>
/// <para>
/// An ElementTypeSignitureToken details the element of a Type signiture. These
/// elements are defined in section 23.1.16 in ECMA 335. Where a type can contain
/// multiple ElementTypeSignitureTokens each building up to reveal more information
/// about the type. This class will only ever provide a single item of detail.
/// </para>
/// </remarks>
public ElementTypeSignatureToken(byte[] signiture, Offset offset)
: base(SignatureTokens.ElementType)
{
ElementType = (ElementTypes)GetCompressedValue(signiture, offset);
int typeMask;
uint token;
switch (ElementType)
{
case ElementTypes.Class:
// Read the typedef, typeref or typespec token
typeMask = 0x00000003;
token = GetCompressedValue(signiture, offset);
switch (typeMask & token)
{
case 0: // TypeDef
Token = token >> 2 | (int)ILMetadataToken.TypeDef; // (token & typeMask) | token >> 2;
break;
case 1: // TypeRef
Token = token >> 2 | (int)ILMetadataToken.TypeRef; //(token & typeMask) | token >> 2;
break;
case 2: // TypeSpec
Token = token >> 2 | (int)ILMetadataToken.TypeSpec; // (token & typeMask) | token >> 2;
break;
}
break;
case ElementTypes.ValueType:
// Read the typedef, typeref or typespec token
typeMask = 0x00000003;
token = GetCompressedValue(signiture, offset);
switch (typeMask & token)
{
case 0: // TypeDef
Token = token >> 2 | (int)ILMetadataToken.TypeDef; // (token & typeMask) | token >> 2;
break;
case 1: // TypeRef
Token = token >> 2 | (int)ILMetadataToken.TypeRef; //(token & typeMask) | token >> 2;
break;
}
break;
case ElementTypes.MVar:
case ElementTypes.Var:
Token = SignatureToken.GetCompressedValue(signiture, offset);
break;
// Well known types
case ElementTypes.Boolean: Definition = WellKnownTypeDef.Boolean; break;
case ElementTypes.I: Definition = WellKnownTypeDef.I; break;
case ElementTypes.I1: Definition = WellKnownTypeDef.I1; break;
case ElementTypes.I2: Definition = WellKnownTypeDef.I2; break;
case ElementTypes.I4: Definition = WellKnownTypeDef.I4; break;
case ElementTypes.I8: Definition = WellKnownTypeDef.I8; break;
case ElementTypes.U: Definition = WellKnownTypeDef.U; break;
case ElementTypes.U1: Definition = WellKnownTypeDef.U1; break;
case ElementTypes.U2: Definition = WellKnownTypeDef.U2; break;
case ElementTypes.U4: Definition = WellKnownTypeDef.U4; break;
case ElementTypes.U8: Definition = WellKnownTypeDef.U8; break;
case ElementTypes.Char: Definition = WellKnownTypeDef.Char; break;
case ElementTypes.R4: Definition = WellKnownTypeDef.R4; break;
case ElementTypes.R8: Definition = WellKnownTypeDef.R8; break;
case ElementTypes.TypedByRef: Definition = WellKnownTypeDef.TypedByRef; break;
case ElementTypes.String: Definition = WellKnownTypeDef.String; break;
case ElementTypes.Object: Definition = WellKnownTypeDef.Object; break;
case ElementTypes.Void: Definition = WellKnownTypeDef.Void; break;
}
}
