Function remove_attribute

nanofi/src/api/nanofi.cpp:443–448

* Removes a key from the attribute chain * @param ff flow file record * @param key key to remove * @return 0 if removed, -1 otherwise */

 * @return 0 if removed, -1 otherwise
 */
int8_t remove_attribute(flow_file_record *ff, const char *key) {
  NULL_CHECK(-1, ff, key);
  NULL_CHECK(-1, ff->attributes);
  auto attribute_map = static_cast<AttributeMap*>(ff->attributes);
  return gsl::narrow<int8_t>(attribute_map->erase(key)) - 1;  // erase by key returns the number of elements removed (0 or 1)
}

int get_content(const flow_file_record* ff, uint8_t* target, int size) {
  NULL_CHECK(0, ff, target);