gzseek           1584 third_party/zlib/zlib.h #  ifdef gzseek
gzseek           1613 third_party/zlib/zlib.h      ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile, z_off_t, int));
gzseek           1621 third_party/zlib/zlib.h    ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile, z_off_t, int));