Method insert_entry

src/proxy/hdrs/XPACK.cc:335–368

}

const XpackLookupResult
XpackDynamicTable::insert_entry(const char *name, size_t name_len, const char *value, size_t value_len)
{
  if (this->_max_entries == 0) {
    return {UINT32_C(0), XpackLookupResult::MatchType::NONE};
  }

  // Make enough space to insert a new entry
  uint64_t required_size = static_cast<uint64_t>(name_len) + static_cast<uint64_t>(value_len) + ADDITIONAL_32_BYTES;
  if (required_size > this->_available) {
    if (!this->_make_space(required_size - this->_available)) {
      // We can't insert a new entry because some stream(s) refer an entry that need to be evicted or the header is too big to
      // store. This is fine with HPACK, but not with QPACK.
      return {UINT32_C(0), XpackLookupResult::MatchType::NONE};
    }
  }

  // Insert
  const char *wks = nullptr;
  hdrtoken_tokenize(name, name_len, &wks);
  this->_entries_head                 = this->_calc_index(this->_entries_head, 1);
  this->_entries[this->_entries_head] = {
    this->_entries_inserted++,
    this->_storage.write(name, static_cast<uint32_t>(name_len), value, static_cast<uint32_t>(value_len)),
    static_cast<uint32_t>(name_len),
    static_cast<uint32_t>(value_len),
    0,
    wks};
  this->_available -= required_size;

  XPACKDbg("Insert Entry: entry=%u, index=%u, size=%zu", this->_entries_head, this->_entries_inserted - 1, name_len + value_len);
  XPACKDbg("Available size: %u", this->_available);
  return {this->_entries_inserted, value_len ? XpackLookupResult::MatchType::EXACT : XpackLookupResult::MatchType::NAME};
}

const XpackLookupResult
XpackDynamicTable::insert_entry(const std::string_view name, const std::string_view value)