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## Copyright (C) 1996 Kurt Hornik
##
## This program is free software; you can redistribute it and/or modify it
## under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 2, or (at your option)
## any later version.
##
## This software is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
## General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this software; see the file COPYING. If not, see
## <http://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn {Function File} {} strtrim (@var{s})
## Remove leading and trailing blanks and nulls from @var{s}. If @var{s}
## is a matrix, @var{strtrim} trims each row to the length of longest
## string. If @var{s} is a cell array, operate recursively on each
## element of the cell array.
## @end deftypefn
## strtrim is based on deblank
## Author: Kurt Hornik <Kurt.Hornik@wu-wien.ac.at>
## Adapted-By: jwe
## Adapted-By: Alexander Barth <abarth@marine.usf.edu>
function s = strtrim (s)
if (nargin != 1)
usage ("strtrim (s)");
endif
if (ischar (s))
k = find (! isspace (s) & s != "\0");
if (isempty (s) || isempty (k))
s = "";
else
k = ceil(k / rows(s));
s = s(:,min(k):max(k));
endif
elseif (iscell(s))
for i = 1:numel (s)
s{i} = strtrim (s{i});
endfor
else
error ("strtrim: expecting string argument");
endif
endfunction
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