1373     png_const_bytep chunk_list, int num_chunks_in)  in png_set_keep_unknown_chunks()  argument
1423       chunk_list = chunks_to_ignore;  in png_set_keep_unknown_chunks()
1429       if (chunk_list == NULL)  in png_set_keep_unknown_chunks()
1443    if (png_ptr->chunk_list == NULL)  in png_set_keep_unknown_chunks()
1465          memcpy(new_list, png_ptr->chunk_list, 5*old_num_chunks);  in png_set_keep_unknown_chunks()
1469       new_list = png_ptr->chunk_list;  in png_set_keep_unknown_chunks()
1488              chunk_list+5*i, keep);  in png_set_keep_unknown_chunks()
1507          if (png_ptr->chunk_list != new_list)  in png_set_keep_unknown_chunks()
1519    if (png_ptr->chunk_list != new_list)  in png_set_keep_unknown_chunks()
1521       if (png_ptr->chunk_list != NULL)  in png_set_keep_unknown_chunks()
1522          png_free(png_ptr, png_ptr->chunk_list);  in png_set_keep_unknown_chunks()
1524       png_ptr->chunk_list = new_list;  in png_set_keep_unknown_chunks()