public CLRSigFieldSig(CLRSignatureParser parser)
{
if (parser.NextByte() != 0x6)
throw new ParseFailedException("Malformed FieldSig");
parser.ConsumeByte();
CustomMods = CLRSigType.ReadCustomMods(parser);
Type = CLRSigType.Parse(parser, false);
}
public static CLRSigType Parse(CLRSignatureParser parser, bool permitVoid)
{
ElementType eType = (ElementType)parser.NextByte();
parser.ConsumeByte();
switch (eType)
{
case ElementType.BOOLEAN:
case ElementType.CHAR:
case ElementType.I1:
case ElementType.U1:
case ElementType.I2:
case ElementType.U2:
case ElementType.I4:
case ElementType.U4:
case ElementType.I8:
case ElementType.U8:
case ElementType.R4:
case ElementType.R8:
case ElementType.I:
case ElementType.U:
case ElementType.OBJECT:
case ElementType.STRING:
return new CLRSigTypeSimple(eType);
case ElementType.VOID:
if (!permitVoid)
throw new ParseFailedException("Unexpected void type");
return new CLRSigTypeSimple(eType);
case ElementType.ARRAY:
return new CLRSigTypeArray(eType, parser);
case ElementType.CLASS:
case ElementType.VALUETYPE:
return new CLRSigTypeStructured(eType, parser);
case ElementType.FNPTR:
return new CLRSigTypeFunctionPointer(eType, parser);
case ElementType.GENERICINST:
return new CLRSigTypeGenericInstantiation(eType, parser);
case ElementType.MVAR:
case ElementType.VAR:
return new CLRSigTypeVarOrMVar(eType, parser);
case ElementType.PTR:
return new CLRSigTypePointer(eType, parser);
case ElementType.SZARRAY:
return new CLRSigTypeSZArray(eType, parser);
default:
throw new ParseFailedException("Unexpected sig type");
}
}
public CLRSigCustomMod(CLRSignatureParser parser)
{
byte token = parser.NextByte();
parser.ConsumeByte();
if (token == 0x1f)
IsOptional = false;
else if (token == 0x20)
IsOptional = true;
else
throw new ParseFailedException("Strange custom mod token");
IndexedType = parser.ReadTypeDefOrRefOrSpecEncoded();
throw new NotSupportedException("Custom modifiers are not supported");
}
public CLRSigMethodDefOrRefSig(CLRSignatureParser parser, Kind allowedKind)
{
byte baseByte = parser.NextByte();
parser.ConsumeByte();
CLRSignatureParser.Token callingConvention = (CLRSignatureParser.Token)(baseByte & 0x0f);
if ((baseByte & (byte)CLRSignatureParser.Token.HASTHIS) != 0)
{
HasThis = true;
if ((baseByte & (byte)CLRSignatureParser.Token.EXPLICITTHIS) != 0)
ExplicitThis = true;
}
if ((baseByte & (int)CLRSignatureParser.Token.GENERIC) != 0)
{
if (allowedKind != Kind.Def && allowedKind != Kind.DefOrRef && allowedKind != Kind.Ref)
throw new ParseFailedException("Invalid method signature");
allowedKind = Kind.Def;
NumGenericParameters = parser.ReadCompressedUInt();
}
switch (callingConvention)
{
case CLRSignatureParser.Token.DEFAULT:
if (allowedKind != Kind.Def && allowedKind != Kind.DefOrRef && allowedKind != Kind.Ref)
throw new ParseFailedException("Invalid method signature");
allowedKind = Kind.Def;
CallingConvention = CallingConventionType.Default;
break;
case CLRSignatureParser.Token.VARARG:
CallingConvention = CallingConventionType.VarArg;
break;
case CLRSignatureParser.Token.C:
if (allowedKind != Kind.StandAlone)
throw new ParseFailedException("Invalid method signature");
CallingConvention = CallingConventionType.C;
break;
case CLRSignatureParser.Token.STDCALL:
if (allowedKind != Kind.StandAlone)
throw new ParseFailedException("Invalid method signature");
CallingConvention = CallingConventionType.StdCall;
break;
case CLRSignatureParser.Token.THISCALL:
if (allowedKind != Kind.StandAlone)
throw new ParseFailedException("Invalid method signature");
CallingConvention = CallingConventionType.ThisCall;
break;
case CLRSignatureParser.Token.FASTCALL:
if (allowedKind != Kind.StandAlone)
throw new ParseFailedException("Invalid method signature");
CallingConvention = CallingConventionType.FastCall;
break;
default:
throw new ParseFailedException("Unexpected signature token");
}
uint paramCount = parser.ReadCompressedUInt();
// Return type
RetType = new CLRSigRetType(parser);
ParamTypes = new CLRSigParamType[paramCount];
bool allowSentinel = (allowedKind == Kind.StandAlone) && (CallingConvention == CallingConventionType.C || CallingConvention == CallingConventionType.VarArg);
// Parameter types
for (uint i = 0; i < paramCount; i++)
ParamTypes[i] = new CLRSigParamType(parser, allowSentinel);
}
public CLRSigTypeGenericInstantiation(ElementType type, CLRSignatureParser parser)
{
BasicType = type;
ElementType instType = (ElementType)parser.NextByte();
parser.ConsumeByte();
if (instType == ElementType.CLASS)
InstantiationType = InstType.Class;
else if (instType == ElementType.VALUETYPE)
InstantiationType = InstType.ValueType;
else
throw new ParseFailedException("Unexpected instantiation type");
GenericType = parser.ReadTypeDefOrRefOrSpecEncoded();
uint genArgCount = parser.ReadCompressedUInt();
ArgTypes = new CLRSigType[genArgCount];
for (uint i = 0; i < genArgCount; i++)
ArgTypes[i] = CLRSigType.Parse(parser, false);
}
public static void ReadCustomModsAndConstraints(CLRSignatureParser parser, out CLRSigCustomMod[] outCustomMods, out CLRSigConstraint[] outConstraints)
{
List<CLRSigCustomMod> customMods = new List<CLRSigCustomMod>();
List<CLRSigConstraint> constraints = new List<CLRSigConstraint>();
byte nextToken = parser.NextByte();
while (true)
{
if (nextToken == (byte)ElementType.PINNED)
{
constraints.Add(new CLRSigConstraint(CLRSigConstraint.ConstraintTypeEnum.Pinned));
parser.ConsumeByte();
}
else if (nextToken == (byte)ElementType.CMOD_OPT || nextToken == (byte)ElementType.CMOD_REQD)
{
customMods.Add(new CLRSigCustomMod(parser));
nextToken = parser.NextByte();
}
else
break;
}
outCustomMods = customMods.ToArray();
outConstraints = constraints.ToArray();
}