Method setByInternedKey

app/src/DataModel/DataTable.cpp:214–252

* @brief Hot-path write keyed by Lua's interned string pointers; an identical value is a * successful no-op that leaves the slot version untouched. */

 *        successful no-op that leaves the slot version untouched.
 */
bool DataModel::DataTableStore::setByInternedKey(const char* table,
                                                 const char* reg,
                                                 const RegisterValue& val)
{
  Q_ASSERT(m_initialized);
  Q_ASSERT(m_isComputed.size() == m_storage.size());

  int idx = -1;
  for (const auto& entry : m_internedKeyCache) {
    if (entry.tablePtr == table && entry.regPtr == reg) {
      idx = entry.storeIndex;
      break;
    }
  }

  if (idx == -1) {
    const QString tableStr                     = QString::fromUtf8(table);
    const QString regStr                       = QString::fromUtf8(reg);
    idx                                        = indexOf(tableStr, regStr);
    m_internedKeyCache[m_internedKeyCacheNext] = {table, reg, idx};
    m_internedKeyCacheNext = (m_internedKeyCacheNext + 1) % kInternedKeyCacheSize;
  }

  if (idx < 0) [[unlikely]]
    return false;

  if (!m_isComputed[static_cast<size_t>(idx)]) [[unlikely]] {
    qWarning() << "[DataTableStore] Cannot write to non-computed register"
               << QLatin1StringView(table) << "/" << QLatin1StringView(reg);
    return false;
  }

  if (sameRegisterValue(m_storage[static_cast<size_t>(idx)], val))
    return true;

  m_storage[static_cast<size_t>(idx)] = val;
  m_version[static_cast<size_t>(idx)] = ++m_writeClock;
  return true;
}

/**
 * @brief Returns true once initialize() has built the register storage.