Method compute_signature

src/proxy/logging/LogObject.cc:277–302

we compute the object signature from the fieldlist_str and the printf_str of the LogFormat rather than from the format_str because the format_str is not part of a LogBuffer header

// is not part of a LogBuffer header
//
uint64_t
LogObject::compute_signature(LogFormat *format, char *filename, unsigned int flags)
{
  std::string_view filename_sv{filename};
  if (filename_sv == "stdout" || filename_sv == "stderr") {
    return 0;
  }
  char    *fl        = format->fieldlist();
  char    *ps        = format->printf_str();
  uint64_t signature = 0;

  if (fl && ps && filename) {
    int   buf_size = strlen(fl) + strlen(ps) + strlen(filename) + 2;
    char *buffer   = static_cast<char *>(ats_malloc(buf_size));

    ink_string_concatenate_strings(buffer, fl, ps, filename,
                                   flags & LogObject::BINARY ? "B" : (flags & LogObject::WRITES_TO_PIPE ? "P" : "A"), NULL);

    CryptoHash hash;
    CryptoContext().hash_immediate(hash, buffer, buf_size - 1);
    signature = hash.fold();

    ats_free(buffer);
  }
  return signature;
}

void
LogObject::display(FILE *fd)