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function varargout = lz4decode(varargin)
%
% output = lz4decode(input)
%    or
% output = lz4decode(input,info)
%
% Decompressing an LZ4-compressed byte-stream to recover the original data
% This function depends on the ZMat toolbox (http://github.com/fangq/zmat)
%
% authors:Qianqian Fang (q.fang <at> neu.edu)
%
% input:
%      input: a string, int8/uint8 vector or numerical array to store LZ4-compressed data
%      info (optional): a struct produced by the zmat/lz4encode function during 
%            compression; if not given, the inputs/outputs will be treated as a
%            1-D vector
%
% 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]=lz4encode(eye(10));
%      orig=lz4decode(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)
    if(nargin>1)
        [varargout{1:nargout}]=zmat(varargin{1},varargin{2:end});
    else
        [varargout{1:nargout}]=zmat(varargin{1},0,'lz4',varargin{2:end});
    end
else
    error('you must install ZMat toolbox to use this feature: http://github.com/fangq/zmat')
end