/// <summary>
/// Obtains the parameter information for a given FuncDesc.
/// </summary>
internal static ParameterInformation[] GetParameterInformation(COM.FUNCDESC funcdesc, bool skipLastParameter)
{
int cParams = funcdesc.cParams;
if (skipLastParameter)
{
Diagnostics.Assert(cParams > 0, "skipLastParameter is only true for property setters where there is at least one parameter");
cParams--;
}
ParameterInformation[] parameters = new ParameterInformation[cParams];
IntPtr ElementDescriptionArrayPtr = funcdesc.lprgelemdescParam;
int ElementDescriptionSize = Marshal.SizeOf <COM.ELEMDESC>();
for (int i = 0; i < cParams; i++)
{
COM.ELEMDESC ElementDescription;
int ElementDescriptionArrayByteOffset;
IntPtr ElementDescriptionPointer;
bool fOptional = false;
ElementDescription = new COM.ELEMDESC();
ElementDescriptionArrayByteOffset = i * ElementDescriptionSize;
// Disable PRefast warning for converting to int32 and converting back into intptr.
// Code below takes into account 32 bit vs 64 bit conversions
#pragma warning disable 56515
if (IntPtr.Size == 4)
{
ElementDescriptionPointer = (IntPtr)(ElementDescriptionArrayPtr.ToInt32() + ElementDescriptionArrayByteOffset);
}
else
{
ElementDescriptionPointer = (IntPtr)(ElementDescriptionArrayPtr.ToInt64() + ElementDescriptionArrayByteOffset);
}
#pragma warning enable 56515
ElementDescription = Marshal.PtrToStructure <COM.ELEMDESC>(ElementDescriptionPointer);
// get the type of parameter
Type type = ComUtil.GetTypeFromTypeDesc(ElementDescription.tdesc);
object defaultvalue = null;
// check is this parameter is optional.
if ((ElementDescription.desc.paramdesc.wParamFlags & COM.PARAMFLAG.PARAMFLAG_FOPT) != 0)
{
fOptional = true;
defaultvalue = Type.Missing;
}
bool fByRef = (ElementDescription.desc.paramdesc.wParamFlags & COM.PARAMFLAG.PARAMFLAG_FOUT) != 0;
parameters[i] = new ParameterInformation(type, fOptional, defaultvalue, fByRef);
}
return(parameters);
}
private static ComMethodInformation GetMethodInformation(
System.Runtime.InteropServices.ComTypes.FUNCDESC funcdesc,
bool skipLastParameter)
{
Type typeFromTypeDesc = ComUtil.GetTypeFromTypeDesc(funcdesc.elemdescFunc.tdesc);
ParameterInformation[] parameterInformation1 = ComUtil.GetParameterInformation(funcdesc, skipLastParameter);
bool hasoptional = false;
foreach (ParameterInformation parameterInformation2 in parameterInformation1)
{
if (parameterInformation2.isOptional)
{
hasoptional = true;
break;
}
}
return(new ComMethodInformation(false, hasoptional, parameterInformation1, typeFromTypeDesc));
}
internal static ParameterInformation[] GetParameterInformation(
System.Runtime.InteropServices.ComTypes.FUNCDESC funcdesc,
bool skipLastParameter)
{
int cParams = (int)funcdesc.cParams;
if (skipLastParameter)
{
--cParams;
}
ParameterInformation[] parameterInformationArray = new ParameterInformation[cParams];
IntPtr lprgelemdescParam = funcdesc.lprgelemdescParam;
int num1 = Marshal.SizeOf(typeof(System.Runtime.InteropServices.ComTypes.ELEMDESC));
for (int index = 0; index < cParams; ++index)
{
System.Runtime.InteropServices.ComTypes.ELEMDESC elemdesc = new System.Runtime.InteropServices.ComTypes.ELEMDESC();
int num2 = index * num1;
elemdesc = (System.Runtime.InteropServices.ComTypes.ELEMDESC)Marshal.PtrToStructure(IntPtr.Size != 4 ? (IntPtr)(lprgelemdescParam.ToInt64() + (long)num2) : (IntPtr)(lprgelemdescParam.ToInt32() + num2), typeof(System.Runtime.InteropServices.ComTypes.ELEMDESC));
Type typeFromTypeDesc = ComUtil.GetTypeFromTypeDesc(elemdesc.tdesc);
object defaultValue = (object)null;
bool isOptional;
if ((elemdesc.desc.paramdesc.wParamFlags & System.Runtime.InteropServices.ComTypes.PARAMFLAG.PARAMFLAG_FOPT) != System.Runtime.InteropServices.ComTypes.PARAMFLAG.PARAMFLAG_NONE)
{
isOptional = true;
defaultValue = Type.Missing;
}
else
{
isOptional = false;
}
bool isByRef = false;
if ((elemdesc.desc.paramdesc.wParamFlags & System.Runtime.InteropServices.ComTypes.PARAMFLAG.PARAMFLAG_FOUT) != System.Runtime.InteropServices.ComTypes.PARAMFLAG.PARAMFLAG_NONE)
{
isByRef = true;
}
parameterInformationArray[index] = new ParameterInformation(typeFromTypeDesc, isOptional, defaultValue, isByRef);
}
return(parameterInformationArray);
}
