function varargout = zlibencode(varargin)
%
% output = zlibencode(input)
% or
% [output, info] = zlibencode(input)
%
% Compress a string or numerical array using the ZLIB-compression
%
% This function depends on JVM in MATLAB or, can optionally use the ZMat
% toolbox (http://github.com/fangq/zmat)
%
% Copyright (c) 2012, Kota Yamaguchi
% URL: https://www.mathworks.com/matlabcentral/fileexchange/39526-byte-encoding-utilities
%
% Modified by: Qianqian Fang (q.fang <at> neu.edu)
%
% input:
% input: the original data, can be a string, a numerical vector or array
%
% output:
% output: the decompressed byte stream stored in a uint8 vector; if info is
% given, output will restore the original data's type and dimensions
%
% examples:
% [bytes, info]=zlibencode(eye(10));
% orig=zlibdecode(bytes,info);
%
% license:
% BSD or GPL version 3, see LICENSE_{BSD,GPLv3}.txt files for details
%
% -- this function is part of JSONLab toolbox (http://iso2mesh.sf.net/cgi-bin/index.cgi?jsonlab)
%
if(nargin==0)
error('you must provide at least 1 input');
end
if(exist('zmat','file')==2 || exist('zmat','file')==3)
[varargout{1:nargout}]=zmat(varargin{1},1,'zlib');
return;
elseif(isoctavemesh)
error('You must install the ZMat toolbox (http://github.com/fangq/zmat) to use this function in Octave');
end
error(javachk('jvm'));
input=typecast(varargin{1}(:)','uint8');
buffer = java.io.ByteArrayOutputStream();
zlib = java.util.zip.DeflaterOutputStream(buffer);
zlib.write(input, 0, numel(input));
zlib.close();
varargout{1} = typecast(buffer.toByteArray(), 'uint8')';
if(nargout>1)
varargout{2}=struct('type',class(varargin{1}),'size',size(varargin{1}),'method','gzip','status',0);
end
