/// <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;
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.ReadCompressedUInt32(out num))
{
break;
}
result = new GenericVar(num, gpContext.Type);
break;
case ElementType.MVar:
if (!reader.ReadCompressedUInt32(out num))
{
break;
}
result = new GenericMVar(num, gpContext.Method);
break;
case ElementType.ValueArray:
nextType = ReadType();
if (!reader.ReadCompressedUInt32(out num))
{
break;
}
result = new ValueArraySig(nextType, num);
break;
case ElementType.Module:
if (!reader.ReadCompressedUInt32(out num))
{
break;
}
result = new ModuleSig(num, ReadType());
break;
case ElementType.GenericInst:
nextType = ReadType();
if (!reader.ReadCompressedUInt32(out num))
{
break;
}
var genericInstSig = new GenericInstSig(nextType as ClassOrValueTypeSig, num);
var args = genericInstSig.GenericArguments;
for (uint i = 0; i < num; i++)
{
args.Add(ReadType());
}
result = genericInstSig;
break;
case ElementType.Array:
nextType = ReadType();
uint rank;
if (!reader.ReadCompressedUInt32(out rank))
{
break;
}
if (rank == 0)
{
result = new ArraySig(nextType, rank);
break;
}
if (!reader.ReadCompressedUInt32(out num))
{
break;
}
var sizes = new List <uint>((int)num);
for (uint i = 0; i < num; i++)
{
uint size;
if (!reader.ReadCompressedUInt32(out size))
{
goto exit;
}
sizes.Add(size);
}
if (!reader.ReadCompressedUInt32(out num))
{
break;
}
var lowerBounds = new List <int>((int)num);
for (uint i = 0; i < num; i++)
{
int size;
if (!reader.ReadCompressedInt32(out 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);
}
/// <summary>
/// Imports a <see cref="TypeSig"/>
/// </summary>
/// <param name="type">The type</param>
/// <returns>The imported type or <c>null</c></returns>
public TypeSig Import(TypeSig type)
{
if (type == null)
{
return(null);
}
if (!recursionCounter.Increment())
{
return(null);
}
TypeSig result;
switch (type.ElementType)
{
case ElementType.Void: result = module.CorLibTypes.Void; break;
case ElementType.Boolean: result = module.CorLibTypes.Boolean; break;
case ElementType.Char: result = module.CorLibTypes.Char; break;
case ElementType.I1: result = module.CorLibTypes.SByte; break;
case ElementType.U1: result = module.CorLibTypes.Byte; break;
case ElementType.I2: result = module.CorLibTypes.Int16; break;
case ElementType.U2: result = module.CorLibTypes.UInt16; break;
case ElementType.I4: result = module.CorLibTypes.Int32; break;
case ElementType.U4: result = module.CorLibTypes.UInt32; break;
case ElementType.I8: result = module.CorLibTypes.Int64; break;
case ElementType.U8: result = module.CorLibTypes.UInt64; break;
case ElementType.R4: result = module.CorLibTypes.Single; break;
case ElementType.R8: result = module.CorLibTypes.Double; break;
case ElementType.String: result = module.CorLibTypes.String; break;
case ElementType.TypedByRef: result = module.CorLibTypes.TypedReference; break;
case ElementType.I: result = module.CorLibTypes.IntPtr; break;
case ElementType.U: result = module.CorLibTypes.UIntPtr; break;
case ElementType.Object: result = module.CorLibTypes.Object; break;
case ElementType.Ptr: result = new PtrSig(Import(type.Next)); break;
case ElementType.ByRef: result = new ByRefSig(Import(type.Next)); break;
case ElementType.ValueType: result = CreateClassOrValueType((type as ClassOrValueTypeSig).TypeDefOrRef, true); break;
case ElementType.Class: result = CreateClassOrValueType((type as ClassOrValueTypeSig).TypeDefOrRef, false); break;
case ElementType.Var: result = new GenericVar((type as GenericVar).Number); break;
case ElementType.ValueArray: result = new ValueArraySig(Import(type.Next), (type as ValueArraySig).Size); break;
case ElementType.FnPtr: result = new FnPtrSig(Import((type as FnPtrSig).Signature)); break;
case ElementType.SZArray: result = new SZArraySig(Import(type.Next)); break;
case ElementType.MVar: result = new GenericMVar((type as GenericMVar).Number); break;
case ElementType.CModReqd: result = new CModReqdSig(Import((type as ModifierSig).Modifier), Import(type.Next)); break;
case ElementType.CModOpt: result = new CModOptSig(Import((type as ModifierSig).Modifier), Import(type.Next)); break;
case ElementType.Module: result = new ModuleSig((type as ModuleSig).Index, Import(type.Next)); break;
case ElementType.Sentinel: result = new SentinelSig(); break;
case ElementType.Pinned: result = new PinnedSig(Import(type.Next)); break;
case ElementType.Array:
var arraySig = (ArraySig)type;
var sizes = new List <uint>(arraySig.Sizes);
var lbounds = new List <int>(arraySig.LowerBounds);
result = new ArraySig(Import(type.Next), arraySig.Rank, sizes, lbounds);
break;
case ElementType.GenericInst:
var gis = (GenericInstSig)type;
var genArgs = new List <TypeSig>(gis.GenericArguments.Count);
foreach (var ga in gis.GenericArguments)
{
genArgs.Add(Import(ga));
}
result = new GenericInstSig(Import(gis.GenericType) as ClassOrValueTypeSig, genArgs);
break;
case ElementType.End:
case ElementType.R:
case ElementType.Internal:
default:
result = null;
break;
}
recursionCounter.Decrement();
return(result);
}
