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function subtree = branch(tree,uid)
% XMLTREE/BRANCH Branch Method
% FORMAT uid = parent(tree,uid)
%
% tree - XMLTree object
% uid - UID of the root element of the subtree
% subtree - XMLTree object (a subtree from tree)
%__________________________________________________________________________
%
% Return a subtree from a tree.
%__________________________________________________________________________
% Copyright (C) 2002-2011 http://www.artefact.tk/
% Guillaume Flandin
% $Id: branch.m 4460 2011-09-05 14:52:16Z guillaume $
%error(nargchk(2,2,nargin));
if uid > length(tree) || ...
numel(uid)~=1 || ...
~strcmp(tree.tree{uid}.type,'element')
error('[XMLTree] Invalid UID.');
end
subtree = xmltree;
subtree = set(subtree,root(subtree),'name',tree.tree{uid}.name);
%- fix by Piotr Dollar to copy attributes for the root node:
subtree = set(subtree,root(subtree),'attributes',tree.tree{uid}.attributes);
child = children(tree,uid);
for i=1:length(child)
l = length(subtree);
subtree = sub_branch(tree,subtree,child(i),root(subtree));
subtree.tree{root(subtree)}.contents = [subtree.tree{root(subtree)}.contents l+1];
end
%==========================================================================
function tree = sub_branch(t,tree,uid,p)
l = length(tree);
tree.tree{l+1} = t.tree{uid};
tree.tree{l+1}.uid = l + 1;
tree.tree{l+1}.parent = p;
tree.tree{l+1}.contents = [];
if isfield(t.tree{uid},'contents')
contents = get(t,uid,'contents');
m = length(tree);
for i=1:length(contents)
tree.tree{l+1}.contents = [tree.tree{l+1}.contents m+1];
tree = sub_branch(t,tree,contents(i),l+1);
m = length(tree);
end
end
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