SigType ReadType(byte [] data, int pos, out int start)
{
start = pos;
ElementType element = (ElementType)Utilities.ReadCompressedInteger(data, start, out start);
switch (element)
{
case ElementType.ValueType:
VALUETYPE vt = new VALUETYPE();
vt.Type = Utilities.GetMetadataToken(CodedIndex.TypeDefOrRef,
(uint)Utilities.ReadCompressedInteger(data, start, out start));
return(vt);
case ElementType.Class:
CLASS c = new CLASS();
c.Type = Utilities.GetMetadataToken(CodedIndex.TypeDefOrRef,
(uint)Utilities.ReadCompressedInteger(data, start, out start));
return(c);
case ElementType.Ptr:
PTR p = new PTR();
int buf = start;
int flag = Utilities.ReadCompressedInteger(data, start, out start);
p.Void = flag == (int)ElementType.Void;
if (p.Void)
{
return(p);
}
start = buf;
p.CustomMods = ReadCustomMods(data, start, out start);
p.PtrType = ReadType(data, start, out start);
return(p);
case ElementType.FnPtr:
FNPTR fp = new FNPTR();
if ((data [start] & 0x5) != 0)
{
MethodRefSig mr = new MethodRefSig((uint)start);
ReadMethodRefSig(mr, data, start, out start);
fp.Method = mr;
}
else
{
MethodDefSig md = new MethodDefSig((uint)start);
ReadMethodDefSig(md, data, start, out start);
fp.Method = md;
}
return(fp);
case ElementType.Array:
ARRAY ary = new ARRAY();
ary.CustomMods = ReadCustomMods(data, start, out start);
ArrayShape shape = new ArrayShape();
ary.Type = ReadType(data, start, out start);
shape.Rank = Utilities.ReadCompressedInteger(data, start, out start);
shape.NumSizes = Utilities.ReadCompressedInteger(data, start, out start);
shape.Sizes = new int [shape.NumSizes];
for (int i = 0; i < shape.NumSizes; i++)
{
shape.Sizes [i] = Utilities.ReadCompressedInteger(data, start, out start);
}
shape.NumLoBounds = Utilities.ReadCompressedInteger(data, start, out start);
shape.LoBounds = new int [shape.NumLoBounds];
for (int i = 0; i < shape.NumLoBounds; i++)
{
shape.LoBounds [i] = Utilities.ReadCompressedInteger(data, start, out start);
}
ary.Shape = shape;
return(ary);
case ElementType.SzArray:
SZARRAY sa = new SZARRAY();
sa.CustomMods = ReadCustomMods(data, start, out start);
sa.Type = ReadType(data, start, out start);
return(sa);
case ElementType.Var:
return(new VAR(Utilities.ReadCompressedInteger(data, start, out start)));
case ElementType.MVar:
return(new MVAR(Utilities.ReadCompressedInteger(data, start, out start)));
case ElementType.GenericInst:
GENERICINST ginst = new GENERICINST();
ginst.ValueType = ((ElementType)Utilities.ReadCompressedInteger(
data, start, out start)) == ElementType.ValueType;
ginst.Type = Utilities.GetMetadataToken(CodedIndex.TypeDefOrRef,
(uint)Utilities.ReadCompressedInteger(data, start, out start));
ginst.Signature = ReadGenericInstSignature(data, start, out start);
return(ginst);
default:
return(new SigType(element));
}
}
void Write(SigType t)
{
Write((int)t.ElementType);
switch (t.ElementType)
{
case ElementType.ValueType:
Write((int)Utilities.CompressMetadataToken(
CodedIndex.TypeDefOrRef, ((VALUETYPE)t).Type));
break;
case ElementType.Class:
Write((int)Utilities.CompressMetadataToken(
CodedIndex.TypeDefOrRef, ((CLASS)t).Type));
break;
case ElementType.Ptr:
PTR p = (PTR)t;
if (p.Void)
{
Write(ElementType.Void);
}
else
{
Write(p.CustomMods);
Write(p.PtrType);
}
break;
case ElementType.FnPtr:
FNPTR fp = (FNPTR)t;
if (fp.Method is MethodRefSig)
{
(fp.Method as MethodRefSig).Accept(this);
}
else
{
(fp.Method as MethodDefSig).Accept(this);
}
break;
case ElementType.Array:
ARRAY ary = (ARRAY)t;
Write(ary.CustomMods);
ArrayShape shape = ary.Shape;
Write(ary.Type);
Write(shape.Rank);
Write(shape.NumSizes);
foreach (int size in shape.Sizes)
{
Write(size);
}
Write(shape.NumLoBounds);
foreach (int loBound in shape.LoBounds)
{
Write(loBound);
}
break;
case ElementType.SzArray:
SZARRAY sa = (SZARRAY)t;
Write(sa.CustomMods);
Write(sa.Type);
break;
case ElementType.Var:
Write(((VAR)t).Index);
break;
case ElementType.MVar:
Write(((MVAR)t).Index);
break;
case ElementType.GenericInst:
GENERICINST gi = t as GENERICINST;
Write(gi.ValueType ? ElementType.ValueType : ElementType.Class);
Write((int)Utilities.CompressMetadataToken(
CodedIndex.TypeDefOrRef, gi.Type));
Write(gi.Signature);
break;
}
}
