private static String ToTypeStringWorker(this IDiaSymbol parameterType, IDiaSession session, int recursionLevel, out bool isValueTypeOrByRef)
{
int hr;
isValueTypeOrByRef = false;
// Block runaway recursions.
if (recursionLevel++ > 10)
return "?";
SymTagEnum symTag;
hr = parameterType.GetSymTag(out symTag);
if (hr != S_OK)
return "?";
if (symTag == SymTagEnum.SymTagPointerType)
{
bool isReference;
hr = parameterType.GetReference(out isReference);
if (hr != S_OK)
return "?";
if (isReference)
{
// An isReference pointer can mean one of two things:
// 1. ELEMENT_TYPE_BYREF
// 2. An indication that the UDT that follows is actually a class, not a struct.
//
isValueTypeOrByRef = true;
IDiaSymbol targetType;
hr = parameterType.GetType(out targetType);
if (hr != S_OK)
return "?";
bool targetIsValueTypeOrByRef;
String targetTypeString = targetType.ToTypeStringWorker(session, recursionLevel, out targetIsValueTypeOrByRef);
if (targetIsValueTypeOrByRef)
return targetTypeString + "&";
else
return targetTypeString;
}
else
{
// A non-isReference pointer means an ELEMENT_TYPE_PTR
IDiaSymbol targetType;
hr = parameterType.GetType(out targetType);
if (hr != S_OK)
return "?";
bool ignore;
return targetType.ToTypeStringWorker(session, recursionLevel, out ignore) + "*";
}
}
else if (symTag == SymTagEnum.SymTagArrayType)
{
// Note: We don't actually hit this case in NUTC-generated PDB's as NUTC emits arrays as if they were UDT's with square brackets in the name.
// But just in case NUTC ever changes its PDB emission, we'll print out the most obvious interpretation and hope we're right.
IDiaSymbol elementType;
hr = parameterType.GetType(out elementType);
if (hr != S_OK)
return "?";
bool ignore;
return elementType.ToTypeStringWorker(session, recursionLevel, out ignore) + "[]";
}
else if (symTag == SymTagEnum.SymTagUDT || symTag == SymTagEnum.SymTagEnum)
{
// Need to figure out whether this is a value type as our recursive caller needs to know whether the "byref pointer" that wrapped this
// is a true managed byref or just the "byref pointer" that wraps all non-valuetypes.
if (symTag == SymTagEnum.SymTagEnum)
{
isValueTypeOrByRef = true;
}
else
{
IDiaEnumSymbols baseClasses;
hr = session.FindChildren(parameterType, SymTagEnum.SymTagBaseClass, null, 0, out baseClasses);
if (hr != S_OK)
return "?";
int count;
hr = baseClasses.Count(out count);
if (hr != S_OK)
return "?";
for (int i = 0; i < count; i++)
{
IDiaSymbol baseClass;
if (S_OK == baseClasses.Item(i, out baseClass))
{
String baseClassName;
if (S_OK == baseClass.GetName(out baseClassName))
{
if (baseClassName == "System::ValueType")
isValueTypeOrByRef = true;
}
}
}
}
String name;
hr = parameterType.GetName(out name);
if (hr != S_OK)
return "?";
return name.RemoveNamespaces().Demanglify();
}
else if (symTag == SymTagEnum.SymTagBaseType)
{
// Certain "primitive" types are encoded specially.
BasicType basicType;
hr = parameterType.GetBaseType(out basicType);
if (hr != S_OK)
return "?";
long length;
hr = parameterType.GetLength(out length);
if (hr != S_OK)
return "?";
return ConvertBasicTypeToTypeString(basicType, length, out isValueTypeOrByRef);
}
else
{
return "?";
}
}
//
// Create the method parameter list.
//
private static String CreateParameterListString(IDiaSession session, IDiaSymbol symbol)
{
StringBuilder sb = new StringBuilder("(");
// find the parameters
IDiaEnumSymbols dataSymbols;
int hr = session.FindChildren(symbol, SymTagEnum.SymTagData, null, NameSearchOptions.nsNone, out dataSymbols);
if (hr == S_OK)
{
int count;
hr = dataSymbols.Count(out count);
if (hr == S_OK)
{
for (int i = 0, iParam = 0; i < count; i++)
{
IDiaSymbol dataSym;
hr = dataSymbols.Item(i, out dataSym);
if (hr != S_OK)
continue;
DataKind dataKind;
hr = dataSym.GetDataKind(out dataKind);
if (hr != S_OK || dataKind != DataKind.DataIsParam)
continue;
string paramName;
hr = dataSym.GetName(out paramName);
if (hr != S_OK)
{
continue;
}
//this approximates the way C# displays methods by not including these hidden arguments
if (paramName == "InstParam" || paramName == "this")
{
continue;
}
IDiaSymbol parameterType;
hr = dataSym.GetType(out parameterType);
if (hr != S_OK)
{
continue;
}
if (iParam++ != 0)
sb.Append(", ");
sb.Append(parameterType.ToTypeString(session));
sb.Append(' ');
sb.Append(paramName);
}
}
}
sb.Append(')');
return sb.ToString();
}
