/// <summary>
/// Tries to relocate the <see cref="ArraySig"/>.
/// </summary>
/// <param name="arraySig">The array sig.</param>
/// <returns></returns>
protected virtual TypeSig TryRelocateArray(ArraySig arraySig)
{
var nextType = TryRelocateTypeSig(arraySig.Next);
if (nextType == null)
return null;
return new ArraySig(nextType);
}
internal TypeSig CreateTypeSig(IList<TSpec> tspecs, TypeSig currentSig) {
foreach (var tspec in tspecs) {
switch (tspec.etype) {
case ElementType.SZArray:
currentSig = new SZArraySig(currentSig);
break;
case ElementType.Array:
var arraySpec = (ArraySpec)tspec;
currentSig = new ArraySig(currentSig, arraySpec.rank, arraySpec.sizes, arraySpec.lowerBounds);
break;
case ElementType.GenericInst:
var ginstSpec = (GenericInstSpec)tspec;
currentSig = new GenericInstSig(currentSig as ClassOrValueTypeSig, ginstSpec.args);
break;
case ElementType.ByRef:
currentSig = new ByRefSig(currentSig);
break;
case ElementType.Ptr:
currentSig = new PtrSig(currentSig);
break;
default:
Verify(false, "Unknown TSpec");
break;
}
}
return currentSig;
}
private TypeSig ResolveGenericArgs(TypeSig typeSig)
{
if (!recursionCounter.Increment())
return null;
if (ReplaceGenericArg(ref typeSig)) {
recursionCounter.Decrement();
return typeSig;
}
TypeSig result;
switch (typeSig.ElementType) {
case ElementType.Ptr:
result = new PtrSig(ResolveGenericArgs(typeSig.Next));
break;
case ElementType.ByRef:
result = new ByRefSig(ResolveGenericArgs(typeSig.Next));
break;
case ElementType.Var:
result = new GenericVar((typeSig as GenericVar).Number);
break;
case ElementType.ValueArray:
result = new ValueArraySig(ResolveGenericArgs(typeSig.Next), (typeSig as ValueArraySig).Size);
break;
case ElementType.SZArray:
result = new SZArraySig(ResolveGenericArgs(typeSig.Next));
break;
case ElementType.MVar:
result = new GenericMVar((typeSig as GenericMVar).Number);
break;
case ElementType.CModReqd:
result = new CModReqdSig((typeSig as ModifierSig).Modifier, ResolveGenericArgs(typeSig.Next));
break;
case ElementType.CModOpt:
result = new CModOptSig((typeSig as ModifierSig).Modifier, ResolveGenericArgs(typeSig.Next));
break;
case ElementType.Module:
result = new ModuleSig((typeSig as ModuleSig).Index, ResolveGenericArgs(typeSig.Next));
break;
case ElementType.Pinned:
result = new PinnedSig(ResolveGenericArgs(typeSig.Next));
break;
case ElementType.FnPtr:
throw new NotSupportedException("FnPtr is not supported.");
case ElementType.Array:
var arraySig = (ArraySig)typeSig;
var sizes = new List<uint>(arraySig.Sizes);
var lbounds = new List<int>(arraySig.LowerBounds);
result = new ArraySig(ResolveGenericArgs(typeSig.Next), arraySig.Rank, sizes, lbounds);
break;
case ElementType.GenericInst:
var gis = (GenericInstSig)typeSig;
var genArgs = new List<TypeSig>(gis.GenericArguments.Count);
foreach (TypeSig ga in gis.GenericArguments) {
genArgs.Add(ResolveGenericArgs(ga));
}
result = new GenericInstSig(ResolveGenericArgs(gis.GenericType) as ClassOrValueTypeSig, genArgs);
break;
default:
result = typeSig;
break;
}
recursionCounter.Decrement();
return result;
}
void AddArraySig()
{
TypeSig = new ArraySig(TypeSig, arrayRank.Value, arraySizes.Value, arrayLowerBounds.Value);
}
TypeSig Create2(TypeSig type) {
if (type == null)
return type;
TypeSig result;
GenericSig varSig;
switch (type.ElementType) {
case ElementType.Void:
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.String:
case ElementType.TypedByRef:
case ElementType.I:
case ElementType.U:
case ElementType.Object:
result = type;
break;
case ElementType.Ptr:
result = new PtrSig(Create2(type.Next));
break;
case ElementType.ByRef:
result = new ByRefSig(Create2(type.Next));
break;
case ElementType.Array:
var ary = (ArraySig)type;
result = new ArraySig(ary.Next, ary.Rank, ary.Sizes, ary.LowerBounds);
break;
case ElementType.SZArray:
result = new SZArraySig(Create2(type.Next));
break;
case ElementType.Pinned:
result = new PinnedSig(Create2(type.Next));
break;
case ElementType.ValueType:
case ElementType.Class:
result = type;
break;
case ElementType.Var:
varSig = (GenericSig)type;
if (genericArgs != null && varSig.Number < (uint)genericArgs.Count) {
result = genericArgs[(int)varSig.Number];
updated = true;
}
else
result = type;
break;
case ElementType.MVar:
varSig = (GenericSig)type;
if (genericMethodArgs != null && varSig.Number < (uint)genericMethodArgs.Count) {
result = genericMethodArgs[(int)varSig.Number];
updated = true;
}
else
result = type;
break;
case ElementType.GenericInst:
var gis = (GenericInstSig)type;
var newGis = new GenericInstSig(Create2(gis.GenericType) as ClassOrValueTypeSig, gis.GenericArguments.Count);
for (int i = 0; i < gis.GenericArguments.Count; i++)
newGis.GenericArguments.Add(Create2(gis.GenericArguments[i]));
result = newGis;
break;
case ElementType.ValueArray:
result = new ValueArraySig(type.Next, ((ValueArraySig)type).Size);
break;
case ElementType.Module:
result = new ModuleSig(((ModuleSig)type).Index, type.Next);
break;
case ElementType.CModReqd:
result = new CModReqdSig(((ModifierSig)type).Modifier, type.Next);
break;
case ElementType.CModOpt:
result = new CModOptSig(((ModifierSig)type).Modifier, type.Next);
break;
case ElementType.FnPtr:
result = new FnPtrSig(Create(((FnPtrSig)type).MethodSig));
break;
case ElementType.End:
case ElementType.R:
case ElementType.Sentinel:
case ElementType.Internal:
default:
result = type;
break;
}
return result;
}
/// <summary>
/// Reads the next type
/// </summary>
/// <returns>A new <see cref="TypeSig"/> instance or <c>null</c> if invalid element type</returns>
TypeSig ReadType()
{
if (!recursionCounter.Increment())
{
return(null);
}
uint num, i;
TypeSig nextType, result = null;
switch ((ElementType)reader.ReadByte())
{
case ElementType.Void: result = corLibTypes.Void; break;
case ElementType.Boolean: result = corLibTypes.Boolean; break;
case ElementType.Char: result = corLibTypes.Char; break;
case ElementType.I1: result = corLibTypes.SByte; break;
case ElementType.U1: result = corLibTypes.Byte; break;
case ElementType.I2: result = corLibTypes.Int16; break;
case ElementType.U2: result = corLibTypes.UInt16; break;
case ElementType.I4: result = corLibTypes.Int32; break;
case ElementType.U4: result = corLibTypes.UInt32; break;
case ElementType.I8: result = corLibTypes.Int64; break;
case ElementType.U8: result = corLibTypes.UInt64; break;
case ElementType.R4: result = corLibTypes.Single; break;
case ElementType.R8: result = corLibTypes.Double; break;
case ElementType.String: result = corLibTypes.String; break;
case ElementType.TypedByRef: result = corLibTypes.TypedReference; break;
case ElementType.I: result = corLibTypes.IntPtr; break;
case ElementType.U: result = corLibTypes.UIntPtr; break;
case ElementType.Object: result = corLibTypes.Object; break;
case ElementType.Ptr: result = new PtrSig(ReadType()); break;
case ElementType.ByRef: result = new ByRefSig(ReadType()); break;
case ElementType.ValueType: result = new ValueTypeSig(ReadTypeDefOrRef()); break;
case ElementType.Class: result = new ClassSig(ReadTypeDefOrRef()); break;
case ElementType.FnPtr: result = new FnPtrSig(ReadSig()); break;
case ElementType.SZArray: result = new SZArraySig(ReadType()); break;
case ElementType.CModReqd: result = new CModReqdSig(ReadTypeDefOrRef(), ReadType()); break;
case ElementType.CModOpt: result = new CModOptSig(ReadTypeDefOrRef(), ReadType()); break;
case ElementType.Sentinel: result = new SentinelSig(); break;
case ElementType.Pinned: result = new PinnedSig(ReadType()); break;
case ElementType.Var:
if (!reader.TryReadCompressedUInt32(out num))
{
break;
}
result = new GenericVar(num, gpContext.Type);
break;
case ElementType.MVar:
if (!reader.TryReadCompressedUInt32(out num))
{
break;
}
result = new GenericMVar(num, gpContext.Method);
break;
case ElementType.ValueArray:
nextType = ReadType();
if (!reader.TryReadCompressedUInt32(out num))
{
break;
}
result = new ValueArraySig(nextType, num);
break;
case ElementType.Module:
if (!reader.TryReadCompressedUInt32(out num))
{
break;
}
result = new ModuleSig(num, ReadType());
break;
case ElementType.GenericInst:
nextType = ReadType();
if (!reader.TryReadCompressedUInt32(out num))
{
break;
}
var genericInstSig = new GenericInstSig(nextType as ClassOrValueTypeSig, num);
var args = genericInstSig.GenericArguments;
for (i = 0; i < num; i++)
{
args.Add(ReadType());
}
result = genericInstSig;
break;
case ElementType.Array:
nextType = ReadType();
uint rank;
if (!reader.TryReadCompressedUInt32(out rank))
{
break;
}
if (rank > MaxArrayRank)
{
break;
}
if (rank == 0)
{
result = new ArraySig(nextType, rank);
break;
}
if (!reader.TryReadCompressedUInt32(out num))
{
break;
}
if (num > MaxArrayRank)
{
break;
}
var sizes = new List <uint>((int)num);
for (i = 0; i < num; i++)
{
if (!reader.TryReadCompressedUInt32(out uint size))
{
goto exit;
}
sizes.Add(size);
}
if (!reader.TryReadCompressedUInt32(out num))
{
break;
}
if (num > MaxArrayRank)
{
break;
}
var lowerBounds = new List <int>((int)num);
for (i = 0; i < num; i++)
{
if (!reader.TryReadCompressedInt32(out int size))
{
goto exit;
}
lowerBounds.Add(size);
}
result = new ArraySig(nextType, rank, sizes, lowerBounds);
break;
case ElementType.Internal:
IntPtr address;
if (IntPtr.Size == 4)
{
address = new IntPtr(reader.ReadInt32());
}
else
{
address = new IntPtr(reader.ReadInt64());
}
result = helper.ConvertRTInternalAddress(address);
break;
case ElementType.End:
case ElementType.R:
default:
result = null;
break;
}
exit:
recursionCounter.Decrement();
return(result);
}
