internal static void WritePropertySig(ModuleBuilder module, ByteBuffer bb, CallingConventions callingConvention,
Type returnType, CustomModifiers returnTypeCustomModifiers,
Type[] parameterTypes, CustomModifiers[] parameterTypeCustomModifiers)
{
byte flags = PROPERTY;
if ((callingConvention & CallingConventions.HasThis) != 0)
{
flags |= HASTHIS;
}
if ((callingConvention & CallingConventions.ExplicitThis) != 0)
{
flags |= EXPLICITTHIS;
}
if ((callingConvention & CallingConventions.VarArgs) != 0)
{
flags |= VARARG;
}
bb.Write(flags);
bb.WriteCompressedInt(parameterTypes == null ? 0 : parameterTypes.Length);
WriteCustomModifiers(module, bb, returnTypeCustomModifiers);
WriteType(module, bb, returnType);
if (parameterTypes != null)
{
for (int i = 0; i < parameterTypes.Length; i++)
{
if (parameterTypeCustomModifiers != null)
{
WriteCustomModifiers(module, bb, parameterTypeCustomModifiers[i]);
}
WriteType(module, bb, parameterTypes[i]);
}
}
}
// 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.ReadCompressedInt();
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.ReadCompressedInt();
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.ReadCompressedInt();
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 LocalVariableInfo(int index, Type type, bool pinned, CustomModifiers customModifiers)
{
this.index = index;
this.type = type;
this.pinned = pinned;
this.customModifiers = customModifiers;
}
internal static Type ReadTypeSpec(ModuleReader module, ByteReader br, IGenericContext context)
{
// LAMESPEC a TypeSpec can contain custom modifiers (C++/CLI generates "newarr (TypeSpec with custom modifiers)")
CustomModifiers.Skip(br);
// LAMESPEC anything can be adorned by (useless) custom modifiers
// also, VAR and MVAR are also used in TypeSpec (contrary to what the spec says)
return(ReadType(module, br, context));
}
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.ReadCompressedInt();
context = new UnboundGenericMethodContext(context);
}
int paramCount = br.ReadCompressedInt();
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));
}
public void SetSignature(Type returnType, CustomModifiers returnTypeCustomModifiers, Type[] parameterTypes, CustomModifiers[] parameterTypeCustomModifiers)
{
method.signature = new MethodSignature(
returnType ?? method.Module.universe.System_Void,
Util.Copy(parameterTypes),
PackedCustomModifiers.CreateFromExternal(returnTypeCustomModifiers, parameterTypeCustomModifiers, parameterTypes.Length),
method.signature.CallingConvention,
method.signature.GenericParameterCount);
}
// this method make a copy of the incoming arrays (where necessary) and returns a normalized modifiers array
internal static PackedCustomModifiers CreateFromExternal(Type[] returnOptional, Type[] returnRequired, Type[][] parameterOptional, Type[][] parameterRequired, int parameterCount)
{
CustomModifiers[] modifiers = null;
Pack(ref modifiers, 0, CustomModifiers.FromReqOpt(returnRequired, returnOptional), parameterCount + 1);
for (int i = 0; i < parameterCount; i++)
{
Pack(ref modifiers, i + 1, CustomModifiers.FromReqOpt(Util.NullSafeElementAt(parameterRequired, i), Util.NullSafeElementAt(parameterOptional, i)), parameterCount + 1);
}
return(new PackedCustomModifiers(modifiers));
}
internal static void Pack(ref CustomModifiers[] array, int index, CustomModifiers mods, int count)
{
if (!mods.IsEmpty)
{
if (array == null)
{
array = new CustomModifiers[count];
}
array[index] = mods;
}
}
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));
}
internal PackedCustomModifiers Bind(IGenericBinder binder)
{
if (customModifiers == null)
{
return(new PackedCustomModifiers());
}
CustomModifiers[] expanded = new CustomModifiers[customModifiers.Length];
for (int i = 0; i < customModifiers.Length; i++)
{
expanded[i] = customModifiers[i].Bind(binder);
}
return(new PackedCustomModifiers(expanded));
}
internal static PackedCustomModifiers CreateFromExternal(CustomModifiers returnTypeCustomModifiers, CustomModifiers[] parameterTypeCustomModifiers, int parameterCount)
{
CustomModifiers[] customModifiers = null;
Pack(ref customModifiers, 0, returnTypeCustomModifiers, parameterCount + 1);
if (parameterTypeCustomModifiers != null)
{
for (int i = 0; i < parameterCount; i++)
{
Pack(ref customModifiers, i + 1, parameterTypeCustomModifiers[i], parameterCount + 1);
}
}
return(new PackedCustomModifiers(customModifiers));
}
internal static Type[] ReadMethodSpec(ModuleReader module, ByteReader br, IGenericContext context)
{
if (br.ReadByte() != GENERICINST)
{
throw new BadImageFormatException();
}
Type[] args = new Type[br.ReadCompressedUInt()];
for (int i = 0; i < args.Length; i++)
{
CustomModifiers.Skip(br);
args[i] = ReadType(module, br, context);
}
return(args);
}
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 = ReadCustomModifiers(module, br, context);
// C++/CLI generates void& local variables, so we need to use ReadTypeOrVoid here
return(ReadTypeOrVoid(module, br, context).__MakeByRefType(mods.required, mods.optional));
}
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.ReadCompressedInt();
Type[] args = new Type[genArgCount];
Type[][] reqmod = null;
Type[][] optmod = 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 mods = ReadCustomModifiers(module, br, context);
if (mods.required != null || mods.optional != null)
{
if (reqmod == null)
{
reqmod = new Type[genArgCount][];
optmod = new Type[genArgCount][];
}
reqmod[i] = mods.required;
optmod[i] = mods.optional;
}
args[i] = ReadType(module, br, context);
}
return(GenericTypeInstance.Make(type, args, reqmod, optmod));
}
private static CustomModifiers ReadCustomModifiers(ModuleReader module, ByteReader br, IGenericContext context)
{
CustomModifiers mods = new CustomModifiers();
byte b = br.PeekByte();
if (IsCustomModifier(b))
{
List <Type> required = new List <Type>();
List <Type> optional = new List <Type>();
while (IsCustomModifier(b))
{
bool req = br.ReadByte() == ELEMENT_TYPE_CMOD_REQD;
Type type = ReadTypeDefOrRefEncoded(module, br, context);
(req ? required : optional).Add(type);
b = br.PeekByte();
}
mods.required = required.ToArray();
mods.optional = optional.ToArray();
}
return(mods);
}
public __StandAloneMethodSig MakeStandAloneMethodSig(CallingConventions callingConvention, Type returnType, CustomModifiers returnTypeCustomModifiers, Type[] parameterTypes, Type[] optionalParameterTypes, CustomModifiers[] parameterTypeCustomModifiers)
{
return(new __StandAloneMethodSig(false, 0, callingConvention, returnType ?? this.System_Void, Util.Copy(parameterTypes), Util.Copy(optionalParameterTypes),
PackedCustomModifiers.CreateFromExternal(returnTypeCustomModifiers, parameterTypeCustomModifiers, Util.NullSafeLength(parameterTypes) + Util.NullSafeLength(optionalParameterTypes))));
}
public __StandAloneMethodSig MakeStandAloneMethodSig(System.Runtime.InteropServices.CallingConvention callingConvention, Type returnType, CustomModifiers returnTypeCustomModifiers, Type[] parameterTypes, CustomModifiers[] parameterTypeCustomModifiers)
{
return(new __StandAloneMethodSig(true, callingConvention, 0, returnType ?? this.System_Void, Util.Copy(parameterTypes), Type.EmptyTypes,
PackedCustomModifiers.CreateFromExternal(returnTypeCustomModifiers, parameterTypeCustomModifiers, Util.NullSafeLength(parameterTypes))));
}
private FieldSignature(Type fieldType, CustomModifiers mods)
{
this.fieldType = fieldType;
this.mods = mods;
}
internal LocalVariableInfo(int index, Type type, bool pinned, CustomModifiers customModifiers)
: this(index, type, pinned)
{
this.customModifiers = 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.ReadCompressedInt()));
case ELEMENT_TYPE_MVAR:
return(context.GetGenericMethodArgument(br.ReadCompressedInt()));
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.ReadCompressedInt(), ReadArrayBounds(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();
}
}
protected static void WriteCustomModifiers(ModuleBuilder module, ByteBuffer bb, CustomModifiers modifiers)
{
foreach (CustomModifiers.Entry entry in modifiers)
{
bb.Write(entry.IsRequired ? ELEMENT_TYPE_CMOD_REQD : ELEMENT_TYPE_CMOD_OPT);
bb.WriteTypeDefOrRefEncoded(module.GetTypeTokenForMemberRef(entry.Type));
}
}
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.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.ReadCompressedInt();
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)));
}
internal static FieldSignature Create(Type fieldType, CustomModifiers customModifiers)
{
return(new FieldSignature(fieldType, customModifiers));
}
