DEFLATE_DEF_WINBITS
-DEFLATE_DEF_WINBITS, DEFLATE_DEF_MEMLEVEL,
err = zlib_inflateInit2(&ds->stream, -DEFLATE_DEF_WINBITS);
zlib_deflate_workspacesize(-DEFLATE_DEF_WINBITS,
params->deflate.winbits = DEFLATE_DEF_WINBITS;