Merge "[res] Small ReadString() optimization in idmap" into main

    return false;

  }

  if (size == 0) {

    *out = "";

    out->clear();

    return true;

  }

  std::string buf(size, '\0');

  if (!stream.read(buf.data(), size)) {

    return false;

  }

  uint32_t padding_size = CalculatePadding(size);

  if (padding_size != 0 && !stream.seekg(padding_size, std::ios_base::cur)) {

  std::string buf;

  // Read both the string and the padding in one operation.

  buf.resize_and_overwrite(size + padding_size, [&](char* out, size_t total) -> size_t {

    if (!stream.read(out, total)) {

      return 0;

    }

    return size;

  });

  if (buf.size() != size) {

    return false;

  }

  *out = std::move(buf);