Function getFormatDescriptorImpl

bindings/python/cobj.cpp:438–472

template <class BTyFunc, class PtrTyFunc>
std::string getFormatDescriptorImpl(Type const* Ty, BTyFunc BTyFormat, PtrTyFunc PtrTyFormat)
{
  switch (Ty->getKind()) {
    case Type::TY_Enum:
      Ty = cast<EnumType>(Ty)->getBasicType();
    case Type::TY_Basic:
      return BTyFormat(cast<BasicType>(Ty));
    case Type::TY_Pointer:
      return PtrTyFormat(cast<PointerType>(Ty));
    case Type::TY_Struct:
    {
      std::string Ret;
      auto* STy = cast<StructType>(Ty);
      size_t CurIdx = 0;
      for (auto const& F: STy->getOrgFields()) {
        const size_t Off = F.getOffset();
        const auto* FTy = F.getType();
        if (CurIdx < Off) {
          // Padding
          for (size_t i = 0; i < (Off-CurIdx); ++i) Ret += "x";
        }
        Ret += getFormatDescriptorImpl(FTy, BTyFormat, PtrTyFormat);
        CurIdx = F.getOffset() + FTy->getSize();
      }
      // Final padding
      for (size_t i = 0; i < (STy->getSize()-CurIdx); ++i) Ret += "x";
      return Ret;
    }
    default:
      break;
  };

  // We treat every other cases as buffer of bytes.
  return std::to_string(Ty->getSize()) + "B";
}

} // anonymous