cd_start          526 ext/zip/lib/zip_close.c     off_t cd_start, end;
cd_start          531 ext/zip/lib/zip_close.c     cd_start = ftello(out);
cd_start          544 ext/zip/lib/zip_close.c     if (_zip_filerange_crc(out, cd_start, size, &crc, &za->error) < 0)