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annotate libinterp/corefcn/__dispatch__.cc @ 20597:bc6daa38ff50

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eliminate more simple uses of error_state * graphics.cc: Eliminate simple uses of error_state.
author John W. Eaton <jwe@octave.org>
date Tue, 06 Oct 2015 14:47:41 -0400
parents 610c74748518
children ba2b07c13913
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1 /*
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2
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3 Copyright (C) 2001-2015 John W. Eaton and Paul Kienzle
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 #include <list>
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28 #include <map>
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29 #include <string>
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30
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31 #include "Cell.h"
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32 #include "oct-map.h"
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33 #include "defun.h"
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34 #include "ov.h"
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35 #include "ov-fcn.h"
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36 #include "ov-typeinfo.h"
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37 #include "pager.h"
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38 #include "parse.h"
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39 #include "symtab.h"
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40 #include "variables.h"
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41
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42 DEFUN (__dispatch__, args, nargout,
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43 "Undocumented internal function")
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44 {
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45 octave_value retval;
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46
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47 int nargin = args.length ();
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48
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49 std::string f, r, t;
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50
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51 if (nargin > 0 && nargin < 4)
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52 {
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53 f = args(0).string_value ();
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54
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55 if (error_state)
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56 {
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57 error ("__dispatch__: first argument must be a function name");
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58 return retval;
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59 }
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60
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61 if (nargin > 1)
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62 {
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63 r = args(1).string_value ();
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64
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65 if (error_state)
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66 {
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67 error ("__dispatch__: second argument must be a function name");
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68 return retval;
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69 }
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70 }
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71
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72 if (nargin > 2)
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73 {
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74 t = args(2).string_value ();
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75
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76 if (error_state)
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77 {
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78 error ("__dispatch__: third argument must be a type name");
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79 return retval;
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80 }
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81 }
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82
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83 if (nargin == 1)
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84 {
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85 if (nargout > 0)
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86 {
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87 symbol_table::fcn_info::dispatch_map_type dm
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88 = symbol_table::get_dispatch (f);
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89
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90 size_t len = dm.size ();
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91
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92 Cell type_field (len, 1);
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93 Cell name_field (len, 1);
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94
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95 symbol_table::fcn_info::dispatch_map_type::const_iterator p
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96 = dm.begin ();
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97
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98 for (size_t i = 0; i < len; i++)
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99 {
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100 type_field(i) = p->first;
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101 name_field(i) = p->second;
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102
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103 p++;
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104 }
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105
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106 octave_scalar_map m;
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107
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108 m.assign ("type", type_field);
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109 m.assign ("name", name_field);
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110
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111 retval = m;
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112 }
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113 else
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114 symbol_table::print_dispatch (octave_stdout, f);
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115 }
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116 else if (nargin == 2)
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117 {
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118 t = r;
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119 symbol_table::clear_dispatch (f, t);
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120 }
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121 else
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122 symbol_table::add_dispatch (f, t, r);
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123 }
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124 else
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125 print_usage ();
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126
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127 return retval;
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128 }
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129
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130 /*
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131 ## No test needed for internal helper function.
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132 %!assert (1)
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133 */