Mercurial > octave
view scripts/gui/isappdata.m @ 30192:8c8031be8072
Windows: Don't get pointers to C strings while vector is still unstable.
* src/main-cli.cc, src/main-gui.cc, src/main.in.cc, src/octave-config.in.cc,
src/octave-svgconvert.cc: The memory used by a vector is not guaranteed to be
stable when elements are added with push_back. Wait until vector is complete
before getting the pointers to the corresponding C strings.
author | Markus Mützel <markus.muetzel@gmx.de> |
---|---|
date | Thu, 16 Sep 2021 21:51:03 +0200 |
parents | 7854d5752dd2 |
children | 81d26e8481a6 |
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######################################################################## ## ## Copyright (C) 2010-2021 The Octave Project Developers ## ## See the file COPYRIGHT.md in the top-level directory of this ## distribution or <https://octave.org/copyright/>. ## ## 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 ## <https://www.gnu.org/licenses/>. ## ######################################################################## ## -*- texinfo -*- ## @deftypefn {} {@var{valid} =} isappdata (@var{h}, @var{name}) ## Return true if the named application data, @var{name}, exists for the ## graphics object with handle @var{h}. ## ## @var{h} may also be a vector of graphics handles. ## @seealso{getappdata, setappdata, rmappdata, guidata, get, set, getpref, setpref} ## @end deftypefn function valid = isappdata (h, name) if (nargin < 1) print_usage (); endif if (! all (ishghandle (h(:)))) error ("isappdata: H must be a scalar or vector of graphic handles"); elseif (! ischar (name)) error ("isappdata: NAME must be a string"); endif valid = false (size (h)); for i = 1:numel (h) appdata = get (h(i), "__appdata__"); if (isfield (appdata, name)) valid(i) = true; endif endfor endfunction %!test %! unwind_protect %! setappdata (0, "%hello%", "world"); %! assert (isappdata (0, "%hello%"), true); %! assert (isappdata ([0 0], "%hello%"), [true, true]); %! assert (isappdata (0, "%foobar%"), false); %! unwind_protect_cleanup %! rmappdata (0, "%hello%"); %! end_unwind_protect ## Test input validation %!error <Invalid call> isappdata () %!error <H must be a scalar .* graphic handle> isappdata (-1, "hello") %!error <NAME must be a string> isappdata (0, 1)