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annotate scripts/general/nargchk.m @ 5018:1c65a8e44ef9 ss-2-1-59

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[project @ 2004-09-22 03:33:29 by jwe]
author jwe
date Wed, 22 Sep 2004 03:33:29 +0000
parents f8dde1807dee
children 4c8a2e4e0717
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1 ## Copyright (C) 1996, 1997 John W. Eaton
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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 2, or (at your option)
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8 ## 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, write to the Free
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17 ## Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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18 ## 02111-1307, USA.
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20 ## -*- texinfo -*-
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21 ## @deftypefn {Function File} {} nargchk (@var{nargin_min}, @var{nargin_max}, @var{n})
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22 ## If @var{n} is in the range @var{nargin_min} through @var{nargin_max}
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23 ## inclusive, return the empty matrix. Otherwise, return a message
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24 ## indicating whether @var{n} is too large or too small.
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25 ##
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26 ## This is useful for checking to see that the number of arguments supplied
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27 ## to a function is within an acceptable range.
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28 ## @end deftypefn
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30 ## Author: jwe
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32 function retval = nargchk (nargin_min, nargin_max, n)
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34 if (nargin != 3)
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35 usage ("nargchk (nargin_min, nargin_max, n)");
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36 endif
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37
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38 if (nargin_min > nargin_max)
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39 error ("nargchk: nargin_min > nargin_max");
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40 endif
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41
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42 if (n < nargin_min)
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43 retval = "nargchk: N is less than nargin_min";
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44 elseif (n > nargin_max)
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45 retval = "nargchk: N is greater than nargin_max";
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46 else
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47 retval = [];
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48 endif
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49
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50 endfunction