// this reads just the optional parameter types, from a MethodRefSig
internal static Type[] ReadOptionalParameterTypes(ModuleReader module, ByteReader br, IGenericContext context, out CustomModifiers[] customModifiers)
{
br.ReadByte();
int paramCount = br.ReadCompressedUInt();
CustomModifiers.Skip(br);
ReadRetType(module, br, context);
for (int i = 0; i < paramCount; i++)
{
if (br.PeekByte() == SENTINEL)
{
br.ReadByte();
Type[] types = new Type[paramCount - i];
customModifiers = new CustomModifiers[types.Length];
for (int j = 0; j < types.Length; j++)
{
customModifiers[j] = CustomModifiers.Read(module, br, context);
types[j] = ReadType(module, br, context);
}
return(types);
}
CustomModifiers.Skip(br);
ReadType(module, br, context);
}
customModifiers = Empty <CustomModifiers> .Array;
return(Type.EmptyTypes);
}
internal static void ReadLocalVarSig(ModuleReader module, ByteReader br, IGenericContext context, List <LocalVariableInfo> list)
{
if (br.Length < 2 || br.ReadByte() != LOCAL_SIG)
{
throw new BadImageFormatException("Invalid local variable signature");
}
int count = br.ReadCompressedUInt();
for (int i = 0; i < count; i++)
{
if (br.PeekByte() == ELEMENT_TYPE_TYPEDBYREF)
{
br.ReadByte();
list.Add(new LocalVariableInfo(i, module.universe.System_TypedReference, false, new CustomModifiers()));
}
else
{
CustomModifiers mods1 = CustomModifiers.Read(module, br, context);
bool pinned = false;
if (br.PeekByte() == ELEMENT_TYPE_PINNED)
{
br.ReadByte();
pinned = true;
}
CustomModifiers mods2 = CustomModifiers.Read(module, br, context);
Type type = ReadTypeOrByRef(module, br, context);
list.Add(new LocalVariableInfo(i, type, pinned, CustomModifiers.Combine(mods1, mods2)));
}
}
}
internal static PropertySignature ReadSig(ModuleReader module, ByteReader br, IGenericContext context)
{
byte flags = br.ReadByte();
if ((flags & PROPERTY) == 0)
{
throw new BadImageFormatException();
}
CallingConventions callingConvention = CallingConventions.Standard;
if ((flags & HASTHIS) != 0)
{
callingConvention |= CallingConventions.HasThis;
}
if ((flags & EXPLICITTHIS) != 0)
{
callingConvention |= CallingConventions.ExplicitThis;
}
Type returnType;
Type[] parameterTypes;
int paramCount = br.ReadCompressedUInt();
CustomModifiers[] mods = null;
PackedCustomModifiers.Pack(ref mods, 0, CustomModifiers.Read(module, br, context), paramCount + 1);
returnType = ReadRetType(module, br, context);
parameterTypes = new Type[paramCount];
for (int i = 0; i < parameterTypes.Length; i++)
{
PackedCustomModifiers.Pack(ref mods, i + 1, CustomModifiers.Read(module, br, context), paramCount + 1);
parameterTypes[i] = ReadParam(module, br, context);
}
return(new PropertySignature(callingConvention, returnType, parameterTypes, PackedCustomModifiers.Wrap(mods)));
}
internal static MethodSignature ReadSig(ModuleReader module, ByteReader br, IGenericContext context)
{
CallingConventions callingConvention;
int genericParamCount;
Type returnType;
Type[] parameterTypes;
byte flags = br.ReadByte();
switch (flags & 7)
{
case DEFAULT:
callingConvention = CallingConventions.Standard;
break;
case VARARG:
callingConvention = CallingConventions.VarArgs;
break;
default:
throw new BadImageFormatException();
}
if ((flags & HASTHIS) != 0)
{
callingConvention |= CallingConventions.HasThis;
}
if ((flags & EXPLICITTHIS) != 0)
{
callingConvention |= CallingConventions.ExplicitThis;
}
genericParamCount = 0;
if ((flags & GENERIC) != 0)
{
genericParamCount = br.ReadCompressedUInt();
context = new UnboundGenericMethodContext(context);
}
int paramCount = br.ReadCompressedUInt();
CustomModifiers[] modifiers = null;
PackedCustomModifiers.Pack(ref modifiers, 0, CustomModifiers.Read(module, br, context), paramCount + 1);
returnType = ReadRetType(module, br, context);
parameterTypes = new Type[paramCount];
for (int i = 0; i < parameterTypes.Length; i++)
{
if ((callingConvention & CallingConventions.VarArgs) != 0 && br.PeekByte() == SENTINEL)
{
Array.Resize(ref parameterTypes, i);
if (modifiers != null)
{
Array.Resize(ref modifiers, i + 1);
}
break;
}
PackedCustomModifiers.Pack(ref modifiers, i + 1, CustomModifiers.Read(module, br, context), paramCount + 1);
parameterTypes[i] = ReadParam(module, br, context);
}
return(new MethodSignature(returnType, parameterTypes, PackedCustomModifiers.Wrap(modifiers), callingConvention, genericParamCount));
}
internal static FieldSignature ReadSig(ModuleReader module, ByteReader br, IGenericContext context)
{
if (br.ReadByte() != FIELD)
{
throw new BadImageFormatException();
}
CustomModifiers mods = CustomModifiers.Read(module, br, context);
Type fieldType = ReadType(module, br, context);
return(new FieldSignature(fieldType, mods));
}
private static Type ReadTypeOrByRef(ModuleReader module, ByteReader br, IGenericContext context)
{
if (br.PeekByte() == ELEMENT_TYPE_BYREF)
{
br.ReadByte();
// LAMESPEC it is allowed (by C++/CLI, ilasm and peverify) to have custom modifiers after the BYREF
// (which makes sense, as it is analogous to pointers)
CustomModifiers mods = CustomModifiers.Read(module, br, context);
// C++/CLI generates void& local variables, so we need to use ReadTypeOrVoid here
return(ReadTypeOrVoid(module, br, context).__MakeByRefType(mods));
}
else
{
return(ReadType(module, br, context));
}
}
private static Type ReadGenericInst(ModuleReader module, ByteReader br, IGenericContext context)
{
Type type;
switch (br.ReadByte())
{
case ELEMENT_TYPE_CLASS:
type = ReadTypeDefOrRefEncoded(module, br, context).MarkNotValueType();
break;
case ELEMENT_TYPE_VALUETYPE:
type = ReadTypeDefOrRefEncoded(module, br, context).MarkValueType();
break;
default:
throw new BadImageFormatException();
}
if (!type.__IsMissing && !type.IsGenericTypeDefinition)
{
throw new BadImageFormatException();
}
int genArgCount = br.ReadCompressedUInt();
Type[] args = new Type[genArgCount];
CustomModifiers[] mods = null;
for (int i = 0; i < genArgCount; i++)
{
// LAMESPEC the Type production (23.2.12) doesn't include CustomMod* for genericinst, but C++ uses it, the verifier allows it and ildasm also supports it
CustomModifiers cm = CustomModifiers.Read(module, br, context);
if (!cm.IsEmpty)
{
if (mods == null)
{
mods = new CustomModifiers[genArgCount];
}
mods[i] = cm;
}
args[i] = ReadType(module, br, context);
}
return(GenericTypeInstance.Make(type, args, mods));
}
internal static __StandAloneMethodSig ReadStandAloneMethodSig(ModuleReader module, ByteReader br, IGenericContext context)
{
CallingConventions callingConvention = 0;
System.Runtime.InteropServices.CallingConvention unmanagedCallingConvention = 0;
bool unmanaged;
byte flags = br.ReadByte();
switch (flags & 7)
{
case DEFAULT:
callingConvention = CallingConventions.Standard;
unmanaged = false;
break;
case 0x01: // C
unmanagedCallingConvention = System.Runtime.InteropServices.CallingConvention.Cdecl;
unmanaged = true;
break;
case 0x02: // STDCALL
unmanagedCallingConvention = System.Runtime.InteropServices.CallingConvention.StdCall;
unmanaged = true;
break;
case 0x03: // THISCALL
unmanagedCallingConvention = System.Runtime.InteropServices.CallingConvention.ThisCall;
unmanaged = true;
break;
case 0x04: // FASTCALL
unmanagedCallingConvention = (System.Runtime.InteropServices.CallingConvention) 5; // FastCall
unmanaged = true;
break;
case VARARG:
callingConvention = CallingConventions.VarArgs;
unmanaged = false;
break;
default:
throw new BadImageFormatException();
}
if ((flags & HASTHIS) != 0)
{
callingConvention |= CallingConventions.HasThis;
}
if ((flags & EXPLICITTHIS) != 0)
{
callingConvention |= CallingConventions.ExplicitThis;
}
if ((flags & GENERIC) != 0)
{
throw new BadImageFormatException();
}
int paramCount = br.ReadCompressedUInt();
CustomModifiers[] customModifiers = null;
PackedCustomModifiers.Pack(ref customModifiers, 0, CustomModifiers.Read(module, br, context), paramCount + 1);
Type returnType = ReadRetType(module, br, context);
List <Type> parameterTypes = new List <Type>();
List <Type> optionalParameterTypes = new List <Type>();
List <Type> curr = parameterTypes;
for (int i = 0; i < paramCount; i++)
{
if (br.PeekByte() == SENTINEL)
{
br.ReadByte();
curr = optionalParameterTypes;
}
PackedCustomModifiers.Pack(ref customModifiers, i + 1, CustomModifiers.Read(module, br, context), paramCount + 1);
curr.Add(ReadParam(module, br, context));
}
return(new __StandAloneMethodSig(unmanaged, unmanagedCallingConvention, callingConvention, returnType, parameterTypes.ToArray(), optionalParameterTypes.ToArray(), PackedCustomModifiers.Wrap(customModifiers)));
}
// see ECMA 335 CLI spec June 2006 section 23.2.12 for this production
protected static Type ReadType(ModuleReader module, ByteReader br, IGenericContext context)
{
CustomModifiers mods;
switch (br.ReadByte())
{
case ELEMENT_TYPE_CLASS:
return(ReadTypeDefOrRefEncoded(module, br, context).MarkNotValueType());
case ELEMENT_TYPE_VALUETYPE:
return(ReadTypeDefOrRefEncoded(module, br, context).MarkValueType());
case ELEMENT_TYPE_BOOLEAN:
return(module.universe.System_Boolean);
case ELEMENT_TYPE_CHAR:
return(module.universe.System_Char);
case ELEMENT_TYPE_I1:
return(module.universe.System_SByte);
case ELEMENT_TYPE_U1:
return(module.universe.System_Byte);
case ELEMENT_TYPE_I2:
return(module.universe.System_Int16);
case ELEMENT_TYPE_U2:
return(module.universe.System_UInt16);
case ELEMENT_TYPE_I4:
return(module.universe.System_Int32);
case ELEMENT_TYPE_U4:
return(module.universe.System_UInt32);
case ELEMENT_TYPE_I8:
return(module.universe.System_Int64);
case ELEMENT_TYPE_U8:
return(module.universe.System_UInt64);
case ELEMENT_TYPE_R4:
return(module.universe.System_Single);
case ELEMENT_TYPE_R8:
return(module.universe.System_Double);
case ELEMENT_TYPE_I:
return(module.universe.System_IntPtr);
case ELEMENT_TYPE_U:
return(module.universe.System_UIntPtr);
case ELEMENT_TYPE_STRING:
return(module.universe.System_String);
case ELEMENT_TYPE_OBJECT:
return(module.universe.System_Object);
case ELEMENT_TYPE_VAR:
return(context.GetGenericTypeArgument(br.ReadCompressedUInt()));
case ELEMENT_TYPE_MVAR:
return(context.GetGenericMethodArgument(br.ReadCompressedUInt()));
case ELEMENT_TYPE_GENERICINST:
return(ReadGenericInst(module, br, context));
case ELEMENT_TYPE_SZARRAY:
mods = CustomModifiers.Read(module, br, context);
return(ReadType(module, br, context).__MakeArrayType(mods));
case ELEMENT_TYPE_ARRAY:
mods = CustomModifiers.Read(module, br, context);
return(ReadType(module, br, context).__MakeArrayType(br.ReadCompressedUInt(), ReadArraySizes(br), ReadArrayBounds(br), mods));
case ELEMENT_TYPE_PTR:
mods = CustomModifiers.Read(module, br, context);
return(ReadTypeOrVoid(module, br, context).__MakePointerType(mods));
case ELEMENT_TYPE_FNPTR:
return(ReadFunctionPointer(module, br, context));
default:
throw new BadImageFormatException();
}
}
