Function xpack_encode_string

src/proxy/hdrs/XPACK.cc:179–219

}

int64_t
xpack_encode_string(uint8_t *buf_start, const uint8_t *buf_end, const char *value, uint64_t value_len, uint8_t n)
{
  uint8_t       *p           = buf_start;
  constexpr bool use_huffman = true;

  ts::LocalBuffer<uint8_t, 4096> local_buffer(value_len * 4);
  uint8_t                       *data     = local_buffer.data();
  int64_t                        data_len = 0;

  // TODO Choose whether to use Huffman encoding wisely
  // cppcheck-suppress knownConditionTrueFalse; leaving "use_huffman" for wise huffman usage in the future
  if (use_huffman && value_len) {
    data_len = huffman_encode(data, reinterpret_cast<const uint8_t *>(value), value_len);
  }

  // Length
  const int64_t len = xpack_encode_integer(p, buf_end, data_len, n);
  if (len == -1) {
    return -1;
  }

  if (use_huffman) {
    *p |= 0x01 << n;
  } else {
    *p &= ~(0x01 << n);
  }
  p += len;

  if (buf_end < p || buf_end - p < data_len) {
    return -1;
  }

  // Value
  if (data_len) {
    memcpy(p, data, data_len);
    p += data_len;
  }

  return p - buf_start;
}

//
// DynamicTable