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function k = xml_findstr(s,p,i,n)
%XML_FINDSTR Find one string within another
% K = XML_FINDSTR(TEXT,PATTERN) returns the starting indices of any
% occurrences of the string PATTERN in the string TEXT.
%
% K = XML_FINDSTR(TEXT,PATTERN,INDICE) returns the starting indices
% equal or greater than INDICE of occurrences of the string PATTERN
% in the string TEXT. By default, INDICE equals to one.
%
% K = XML_FINDSTR(TEXT,PATTERN,INDICE,NBOCCUR) returns the NBOCCUR
% starting indices equal or greater than INDICE of occurrences of
% the string PATTERN in the string TEXT. By default, INDICE equals
% to one and NBOCCUR equals to Inf.
%
% Examples
% s = 'How much wood would a woodchuck chuck?';
% xml_findstr(s,' ') returns [4 9 14 20 22 32]
% xml_findstr(s,' ',10) returns [14 20 22 32]
% xml_findstr(s,' ',10,1) returns 14
%
% See also STRFIND, FINDSTR
%__________________________________________________________________________
% Copyright (C) 2002-2011 http://www.artefact.tk/
% Guillaume Flandin
% $Id: xml_findstr.m 4460 2011-09-05 14:52:16Z guillaume $
%error(sprintf('Missing MEX-file: %s', mfilename));
persistent runonce
if isempty(runonce)
warning(sprintf(['xml_findstr is not compiled for your platform.\n'...
'This will result in a slowdown of the XML parsing.']));
runonce = 1;
end
% k = regexp(s(i:end),p,'once') + i - 1;
if nargin < 3, i = 1; end
if nargin < 4, n = Inf; end
j = strfind(s,p);
k = j(j>=i);
if ~isempty(k), k = k(1:min(n,length(k))); end
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