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## Copyright (C) 2012-2013 John W. Eaton
##
## This file is part of Octave.
##
## Octave 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 3 of the License, or (at
## your option) any later version.
##
## Octave 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 Octave; see the file COPYING. If not, see
## <http://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn {Function File} {} addpref (@var{group}, @var{pref}, @var{val})
## Add a preference @var{pref} and associated value @var{val} to the
## named preference group @var{group}.
##
## The named preference group must be a character string.
##
## The preference @var{pref} may be a character string or a cell array
## of character strings. The corresponding value @var{val} may be any
## value, or, if @var{pref} is a cell array of strings, @var{val}
## must be a cell array of values with the same size as @var{pref}.
## @seealso{setpref, getpref, ispref, rmpref}
## @end deftypefn
## Author: jwe
function addpref (group, pref, val)
if (nargin == 3)
if (ischar (group))
prefs = loadprefs ();
if (ischar (pref))
if (isfield (group, pref))
error ("preference %s already exists in group %s", pref, group);
else
prefs.(group).(pref) = val;
endif
elseif (iscellstr (pref))
if (size_equal (pref, val))
for i = 1:numel (pref)
if (isfield (group, pref{i}))
error ("preference %s already exists in group %s",
pref{i}, group);
else
prefs.(group).(pref{i}) = val;
endif
endfor
else
error ("size mismatch for pref and val");
endif
else
error ("expecting pref to be a character string or cellstr");
endif
saveprefs (prefs);
else
error ("expecting group to be a character string");
endif
else
print_usage ();
endif
endfunction
%% Testing these functions will require some care to avoid wiping out
%% existing (or creating unwanted) preferences for the user running the
%% tests.
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