protected override CodeObject GenerateCodeDom()
{
CodeTypeMember codeDom;
IntPtr funcDescPtr;
FUNCDESC funcDesc;
// Have to get the FUNCDESC from the _typeInfo because
// it cannot be saved. The reason for this is that a TYPEDESC
// may have a pointer to another TYPEDESC which is allocated
// in the unmanaged memory and that pointer won't be any good
// outside of the scope where the FUNCDESC is held.
_typeInfo.GetFuncDesc(_index, out funcDescPtr);
funcDesc =
(FUNCDESC)Marshal.PtrToStructure(funcDescPtr,
typeof(FUNCDESC));
if (funcDesc.invkind == INVOKEKIND.INVOKE_FUNC)
{
CodeMemberMethod meth;
meth = new CodeMemberMethod();
codeDom = meth;
TYPEDESC retType = funcDesc.elemdescFunc.tdesc;
if (_parameters.Count > 0)
{
int limit = _parameters.Count;
// If the last parameter is a retval and the
// function returns an HRESULT, then make
// the function return the last parameter
if ((VarEnum)funcDesc.elemdescFunc.tdesc.vt
== VarEnum.VT_HRESULT)
{
ComParamInfo lastParam = (ComParamInfo)
_parameters[_parameters.Count - 1];
if ((lastParam._paramFlags &
PARAMFLAG.PARAMFLAG_FRETVAL) != 0)
{
IntPtr elemPtr = funcDesc.lprgelemdescParam;
ELEMDESC elemDesc = new ELEMDESC();
// Point to the last one
elemPtr = new IntPtr(elemPtr.ToInt64() +
((_parameters.Count - 1) *
Marshal.SizeOf(elemDesc)));
elemDesc = (ELEMDESC)
Marshal.PtrToStructure(elemPtr,
typeof(ELEMDESC));
// Make the return type the last parameter's
retType = elemDesc.tdesc;
limit--;
}
}
// Only add up to the limit
// (may omit the last paremeter)
AddDomParams(funcDesc, meth, limit);
}
// HRESULT becomes void because its handled by the exception
// mechanism, we just leave the return type null
if ((VarEnum)retType.vt != VarEnum.VT_HRESULT)
{
String typeName = TypeLibUtil.TYPEDESCToString
(_typeLib,
_typeInfo,
retType,
!TypeLibUtil.COMTYPE);
// Get rid of the ref since this is now a return type
if (typeName.StartsWith("ref "))
typeName = typeName.Substring(4);
if (TraceUtil.If(this, TraceLevel.Info))
{
Trace.WriteLine(this, "CG - " + Name
+ " return: " + typeName);
}
meth.ReturnType = new CodeTypeReference(typeName);
}
}
else
{
CodeMemberProperty prop;
prop = new CodeMemberProperty();
codeDom = prop;
prop.Type = new CodeTypeReference
(TypeLibUtil.TYPEDESCToString
(_typeLib,
_typeInfo,
funcDesc.elemdescFunc.tdesc,
!TypeLibUtil.COMTYPE));
}
codeDom.Name = Name;
codeDom.Attributes = MemberAttributes.Public;
_typeInfo.ReleaseFuncDesc(funcDescPtr);
return codeDom;
}
