Method Concat

include/tvm/ffi/string.h:797–818

! * \brief Concatenate two char sequences * * \param lhs Pointers to the lhs char array * \param lhs_size The size of the lhs char array * \param rhs Pointers to the rhs char array * \param rhs_size The size of the rhs char array * * \return The concatenated char sequence */

   * \return The concatenated char sequence
   */
  static String Concat(const char* lhs, size_t lhs_size, const char* rhs, size_t rhs_size) {
    String ret;
    // disable stringop-overflow and restrict warnings
    // gcc may produce false positive when we enable dest_data returned from small string path
    // Because compiler is not able to detect the condition that the path is only triggered via
    // size < kMaxSmallStrLen and can report it as a overflow case.
#if (__GNUC__) && !(__clang__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wstringop-overflow"
#pragma GCC diagnostic ignored "-Warray-bounds"
#pragma GCC diagnostic ignored "-Wrestrict"
#endif
    char* dest_data = ret.InitSpaceForSize(lhs_size + rhs_size);
    std::memcpy(dest_data, lhs, lhs_size);
    std::memcpy(dest_data + lhs_size, rhs, rhs_size);
    // NOLINTNEXTLINE(clang-analyzer-security.ArrayBound)
    dest_data[lhs_size + rhs_size] = '\0';
#if (__GNUC__) && !(__clang__)
#pragma GCC diagnostic pop
#endif
    return ret;
  }
  // Overload + operator
  friend String operator+(const String& lhs, const String& rhs);
  friend String operator+(const String& lhs, const std::string& rhs);