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annotate scripts/plot/util/hgload.m @ 18630:70d9db29db6f

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hgload.m: Correctly find filenames with .ofig extension. * hgload.m: Use file_in_loadpath() rather than exist() to check for presence of file.
author Rik <rik@octave.org>
date Thu, 27 Mar 2014 08:52:11 -0700
parents 70cff922a42d
children 348f67886dc4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
18614
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parents:
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1 ## Copyright (C) 2014 Massimiliano Fasi
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, see
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17 ## <http://www.gnu.org/licenses/>.
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18
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Function File} {@var{h} =} hgload (@var{filename})
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21 ## Load the graphics object in @var{filename} into the graphics handle @var{h}.
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22 ##
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23 ## If @var{filename} has no extension, Octave will try to find the file with
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24 ## and without the standard extension of @file{.ofig}.
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25 ## @seealso{hgsave, struct2hdl}
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26 ## @end deftypefn
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27
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28 ## Author: Massimiliano Fasi
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29
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30 function h = hgload (filename)
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31
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32 ## Check input arguments
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33 if (nargin != 1)
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34 print_usage ();
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35 endif
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36
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37 ## Check file existence
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38 if (isempty (file_in_loadpath (filename)))
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39 [~, ~, ext] = fileparts (filename);
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40 if (isempty (ext))
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41 filename = [filename ".ofig"];
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42 endif
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43 if (isempty (file_in_loadpath (filename)))
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44 error ("hgload: unable to locate file %s", filename);
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45 endif
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46 endif
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47
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48 ## Load the handle
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49 try
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50 stmp = load (filename, "s_oct40");
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51 catch
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52 error ("hgload: could not load hgsave-formatted object in file %s", filename);
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53 end_try_catch
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54
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55 h = struct2hdl (stmp.s_oct40);
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56
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57 endfunction
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58
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59
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60 ## Functional test for hgload/hgsave pair is in hgsave.m
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61
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62 %% Test input validation
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63 %!error hgload ()
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64 %!error hgload (1, 2)
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65 %!error <unable to locate file> hgload ("%%_A_REALLY_UNLIKELY_FILENAME_%%")
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66