3-clause BSD is GPL-compatible, so legally there is no problem, but can you explain further the technical justification?
On 6/16/11 2:13 PM, Brian Hinz wrote: > Assuming that it's OK legally, would anyone object if I were to import a > copy of JZlib (http://www.jcraft.com/jzlib/) into the TigerVNC java > client's tree and revamp ZlibInStream so that it's consistent with the C > version? JZlib is released under a BSD-style license > (http://www.jcraft.com/jzlib/LICENSE.txt): > > JZlib 0.0.* were released under the GNU LGPL license. Later, we have > switched > over to a BSD-style license. > > ------------------------------------------------------------------------------ > Copyright (c) 2000,2001,2002,2003,2004 ymnk, JCraft,Inc. All rights reserved. > > Redistribution and use in source and binary forms, with or without > modification, are permitted provided that the following conditions are met: > > 1. Redistributions of source code must retain the above copyright notice, > this list of conditions and the following disclaimer. > > 2. Redistributions in binary form must reproduce the above copyright > notice, this list of conditions and the following disclaimer in > the documentation and/or other materials provided with the distribution. > > 3. The names of the authors may not be used to endorse or promote products > derived from this software without specific prior written permission. > > THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, > INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND > FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT, > INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT, > INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT > LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, > OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF > LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING > NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, > EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. > > ------------------------------------------------------------------------------ > > This appears to be consistent with the list of GPL-compatible free software > licenses listed on gnu.org <http://gnu.org>. Also, the JZlib home page notes > that JZlib is used in JmakeTxt, which is released under the GPLv2. I can > contact JCraft to get confirmation. > > The reason that I ask is that since adding support for Tight encoding, I've > periodically encountered an exception thrown by the call to > java.util.zip.Inflater.inflate in ZlibInStream. This because the output > buffer for the decompression is a fixed size, and the native java Infalter > class does not provide a means to handle compressed data whose uncompressed > size is unknown prior to decompression. In the C version, zlib handles this > via avail_out, and in the previous java client the decompression buffer is > allocated based on the required size. The problem with just allocating > bigger decompression buffers is that for large desktops, this can cause the > Java VM to exceed the initial heap size. > > When implemented with JZlib, the heap size limitation does not seem to be an > issue, and as far as I can tell, the performance is no worse (possibly even > better). The size of the resulting jar file only increases by ~30k when all > of the JZlib classes are included. > > Thanks, > > -brian > > > > ------------------------------------------------------------------------------ > EditLive Enterprise is the world's most technically advanced content > authoring tool. Experience the power of Track Changes, Inline Image > Editing and ensure content is compliant with Accessibility Checking. > http://p.sf.net/sfu/ephox-dev2dev > > > > _______________________________________________ > Tigervnc-devel mailing list > Tigervnc-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/tigervnc-devel ------------------------------------------------------------------------------ EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev _______________________________________________ Tigervnc-devel mailing list Tigervnc-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/tigervnc-devel
