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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, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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18 ## 02110-1301, USA. |
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19 |
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20 ## -*- texinfo -*- |
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21 ## @deftypefn {Function File} {} strerror (@var{name}, @var{num}) |
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22 ## Return the text of an error message for function @var{name} |
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23 ## corresponding to the error number @var{num}. This function is intended |
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24 ## to be used to print useful error messages for those functions that |
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25 ## return numeric error codes. |
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26 ## @end deftypefn |
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27 |
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28 ## Author: jwe |
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29 |
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30 function msg = strerror (name, err) |
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31 |
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32 if (nargin != 2) |
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33 usage ("strerror (name, err)"); |
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34 endif |
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35 |
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36 if (! ischar (name)) |
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37 error ("strerror: first argument must be a string"); |
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38 endif |
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39 |
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40 if (! isscalar (err)) |
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41 error ("strerror: second argument must be a scalar"); |
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42 endif |
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43 |
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44 if (strcmp (name, "fsolve")) |
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45 |
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46 if (err == -2) |
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47 msg = "input error\n"; |
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48 elseif (err == -1) |
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49 msg = "error encountered in user-supplied function\n"; |
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50 elseif (err == 1) |
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51 msg = "solution converged to requested tolerance\n"; |
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52 elseif (err == 4) |
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53 msg = "iteration limit exceeded\n"; |
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54 elseif (err == 3) |
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55 msg = "iteration is not making good progress\n"; |
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56 else |
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57 error ("strerror: unrecognized error code for fsolve"); |
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58 endif |
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59 |
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60 else |
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61 |
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62 error ("strerror: unrecognized function name"); |
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63 |
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64 endif |
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65 |
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66 endfunction |
