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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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19 |
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20 ## usage: msg = strerror (name, err) |
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21 ## |
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22 ## Return the text of an error message for error number `err' from |
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23 ## function "name". |
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24 ## |
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25 ## Messages correspond to the following subroutine versions: |
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26 ## |
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27 ## npsol : 4.0 |
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28 ## qpsol : 3.2 |
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29 |
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30 ## Author: jwe |
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31 |
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32 function msg = strerror (name, err) |
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33 |
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34 if (nargin != 2) |
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35 usage ("strerror (name, err)"); |
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36 endif |
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37 |
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38 if (! isstr (name)) |
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39 error ("strerror: first argument must be a string"); |
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40 endif |
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41 |
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42 if (! is_scalar (err)) |
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43 error ("strerror: second argument must be a scalar"); |
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44 endif |
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45 |
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46 if (strcmp (name, "fsolve")) |
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47 |
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48 if (err == -2) |
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49 msg = "input error\n"; |
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50 elseif (err == -1) |
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51 msg = "error encountered in user-supplied function\n"; |
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52 elseif (err == 1) |
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53 msg = "solution converged to requested tolerance\n"; |
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54 elseif (err == 4) |
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55 msg = "iteration limit exceeded\n"; |
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56 elseif (err == 3) |
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57 msg = "iteration is not making good progress\n"; |
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58 else |
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59 error ("strerror: unrecognized error code for fsolve"); |
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60 endif |
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61 |
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62 elseif (strcmp (name, "npsol")) |
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63 |
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64 if (err == 0) |
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65 msg = "optimal solution found\n"; |
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66 elseif (err == 1) |
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67 msg = "weak local solution found\n"; |
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68 elseif (err == 2) |
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69 msg = "no feasible point for linear constraints and bounds\n"; |
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70 elseif (err == 3) |
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71 msg = "no feasible point found for nonlinear constraints\n"; |
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72 elseif (err == 4) |
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73 msg = "iteration limit reached\n"; |
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74 elseif (err == 6) |
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75 msg = "current point cannot be improved upon\n"; |
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76 elseif (err == 7) |
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77 msg = "user-supplied derivatives appear to be incorrect\n"; |
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78 elseif (err == 9) |
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79 msg = "internal error: invalid input parameter\n"; |
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80 else |
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81 error ("strerror: unrecognized error code for npsol"); |
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82 endif |
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83 |
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84 elseif (strcmp (name, "qpsol")) |
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85 |
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86 if (err == 0) |
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87 msg = "optimal solution found\n"; |
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88 elseif (err == 1) |
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89 msg = "weak local solution found\n"; |
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90 elseif (err == 2) |
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91 msg = "solution appears to be unbounded\n"; |
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92 elseif (err == 3) |
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93 msg = "solution appears optimal, but optimality can't be verified\n"; |
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94 elseif (err == 4) |
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95 msg = "iterates of the QP phase appear to be cycling\n"; |
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96 elseif (err == 5) |
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97 msg = "iteration limit reached during QP phase\n"; |
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98 elseif (err == 6) |
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99 msg = "no feasible point found during LP phase\n"; |
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100 elseif (err == 7) |
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101 msg = "iterates of the LP phase appear to be cycling\n"; |
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102 elseif (err == 8) |
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103 msg = "iteration limit reached during LP phase\n"; |
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104 elseif (err == 9) |
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105 msg = "internal error: invalid input parameter\n"; |
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106 else |
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107 error ("strerror: unrecognized error code for qpsol"); |
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108 endif |
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109 |
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110 else |
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111 |
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112 error ("strerror: unrecognized function name"); |
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113 |
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114 endif |
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115 |
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116 endfunction |
