be64tohp
uint64_t be64tohp(void**);
out_header->encodings = be64tohp(&ptr);
out_forkdata->logical_size = be64tohp(&ptr);
out_info->offset = be64tohp(&ptr);
out_info->size = be64tohp(&ptr);
out_info->reserved[i] = be64tohp(&ptr);
out_header->start = be64tohp(&ptr);
out_header->end = be64tohp(&ptr);
out_header->size = be64tohp(&ptr);
extern uint64_t be64tohp(void** inout_ptr);