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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 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} {} nargchk (@var{nargin_min}, @var{nargin_max}, @var{n}) |
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21 ## If @var{n} is in the range @var{nargin_min} through @var{nargin_max} |
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22 ## inclusive, return the empty matrix. Otherwise, return a message |
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23 ## indicating whether @var{n} is too large or too small. |
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24 ## |
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25 ## This is useful for checking to see that the number of arguments supplied |
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26 ## to a function is within an acceptable range. |
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27 ## @end deftypefn |
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28 |
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29 ## Author: jwe |
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30 |
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31 function retval = nargchk (nargin_min, nargin_max, n) |
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32 |
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33 if (nargin != 3) |
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34 print_usage (); |
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35 endif |
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36 |
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37 if (nargin_min > nargin_max) |
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38 error ("nargchk: nargin_min > nargin_max"); |
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39 endif |
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40 |
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41 if (n < nargin_min) |
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42 retval = "nargchk: N is less than nargin_min"; |
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43 elseif (n > nargin_max) |
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44 retval = "nargchk: N is greater than nargin_max"; |
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45 else |
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46 retval = []; |
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47 endif |
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48 |
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49 endfunction |
