.Dd January 15, 2017 .Dt COMPRESSBOUND 3 .Os . .Sh NAME .Nm compressBound .Nd compressed size upper bound . .Sh LIBRARY .Lb libz . .Sh SYNOPSIS .In zlib.h .Ft uLong .Fn compressBound "uLong sourceLen" . .Sh DESCRIPTION .Fn compressBound returns an upper bound on the compressed size after .Xr compress 3 or .Xr compress2 3 on .Fa sourceLen bytes. It would be used before a .Xr compress 3 or .Xr compress2 3 call to allocate the destination buffer. . .Sh SEE ALSO .Xr compress 3 , .Xr deflateBound 3 . .Sh HISTORY This manual page was converted from .In zlib.h to mdoc format by .An C. McEnroe Aq Mt june@causal.agency . . .Sh AUTHORS .An Jean-loup Gailly Aq Mt jloup@gzip.org .An Mark Adler Aq Mt madler@alumni.caltech.edu