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4343
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1 /* |
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2 |
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3 Copyright (C) 2003 John W. Eaton |
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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 2, or (at your option) any |
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10 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, write to the Free |
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19 Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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20 02110-1301, USA. |
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21 |
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22 */ |
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23 |
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24 #ifdef HAVE_CONFIG_H |
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25 #include <config.h> |
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26 #endif |
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27 |
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28 #include <iostream> |
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5765
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29 #include <sstream> |
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5164
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30 #include <vector> |
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31 |
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32 #include "defun.h" |
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4654
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33 #include "error.h" |
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34 #include "gripes.h" |
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5663
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35 #include "input.h" |
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4343
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36 #include "oct-map.h" |
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37 #include "ov-base.h" |
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38 #include "ov-fcn-handle.h" |
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4980
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39 #include "ov-usr-fcn.h" |
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4343
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40 #include "pr-output.h" |
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4980
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41 #include "pt-pr-code.h" |
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42 #include "pt-misc.h" |
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43 #include "pt-stmt.h" |
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44 #include "pt-cmd.h" |
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45 #include "pt-exp.h" |
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46 #include "pt-assign.h" |
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4343
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47 #include "variables.h" |
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4988
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48 #include "parse.h" |
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49 |
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50 #include "byte-swap.h" |
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51 #include "ls-oct-ascii.h" |
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52 #include "ls-hdf5.h" |
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53 #include "ls-utils.h" |
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4343
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54 |
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55 DEFINE_OCTAVE_ALLOCATOR (octave_fcn_handle); |
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56 |
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4612
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57 DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA (octave_fcn_handle, |
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58 "function handle", |
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5946
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59 "function_handle"); |
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4343
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60 |
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5663
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61 void |
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62 octave_fcn_handle::reload_warning (const std::string& fcn_type) const |
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63 { |
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64 if (warn_reload) |
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65 { |
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66 warn_reload = false; |
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67 |
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68 warning ("reloading %s functions referenced by function handles is not implemented", |
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69 fcn_type.c_str ()); |
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70 } |
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71 } |
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72 |
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4924
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73 octave_value_list |
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74 octave_fcn_handle::subsref (const std::string& type, |
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75 const std::list<octave_value_list>& idx, |
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76 int nargout) |
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77 { |
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78 octave_value_list retval; |
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79 |
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80 switch (type[0]) |
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81 { |
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82 case '(': |
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83 { |
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84 octave_function *f = function_value (); |
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5312
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85 |
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5663
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86 if (f && f->time_checked () < Vlast_prompt_time) |
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87 { |
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88 std::string ff_nm = f->fcn_file_name (); |
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89 |
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90 time_t tp = f->time_parsed (); |
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91 |
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92 if (ff_nm.empty ()) |
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93 { |
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5775
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94 // FIXME -- need to handle inline and |
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5663
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95 // command-line functions here. |
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96 } |
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97 else |
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98 { |
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99 if (fcn_out_of_date (f, ff_nm, tp)) |
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100 { |
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5775
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101 // FIXME -- there is currently no way to |
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5663
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102 // parse a .m file or reload a .oct file that |
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103 // leaves the fbi symbol table untouched. We need |
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104 // a function that will parse the file and return |
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105 // a pointer to the new function definition |
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106 // without altering the symbol table. |
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107 |
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108 if (f->is_nested_function ()) |
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109 reload_warning ("nested"); |
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110 else |
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111 reload_warning ("functions"); |
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112 } |
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113 } |
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114 } |
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5312
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115 |
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116 if (f) |
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117 retval = f->subsref (type, idx, nargout); |
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118 else |
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119 error ("invalid function handle"); |
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4924
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120 } |
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121 break; |
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122 |
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123 |
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124 case '{': |
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125 case '.': |
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126 { |
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4930
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127 std::string typ_nm = type_name (); |
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128 error ("%s cannot be indexed with %c", typ_nm.c_str (), type[0]); |
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4924
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129 } |
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130 break; |
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131 |
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132 default: |
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133 panic_impossible (); |
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134 } |
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135 |
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5775
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136 // FIXME -- perhaps there should be an |
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4924
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137 // octave_value_list::next_subsref member function? See also |
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138 // octave_builtin::subsref. |
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139 |
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140 if (idx.size () > 1) |
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4994
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141 retval = retval(0).next_subsref (nargout, type, idx); |
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4924
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142 |
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143 return retval; |
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144 } |
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145 |
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4988
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146 bool |
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5958
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147 octave_fcn_handle::save_ascii (std::ostream& os, bool&) |
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4988
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148 { |
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149 os << nm << "\n"; |
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4989
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150 |
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4988
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151 if (nm == "@<anonymous>") |
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152 { |
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4989
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153 print_raw (os, true); |
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154 os << "\n"; |
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4988
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155 } |
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156 |
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157 return true; |
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158 } |
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159 |
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160 bool |
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161 octave_fcn_handle::load_ascii (std::istream& is) |
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162 { |
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163 is >> nm; |
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4989
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164 |
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4988
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165 if (nm == "@<anonymous>") |
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166 { |
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167 char c; |
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5765
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168 std::ostringstream buf; |
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4988
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169 |
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4989
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170 // Skip preceeding newline(s). |
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171 while (is.get (c) && c == '\n') |
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172 /* do nothing */; |
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4988
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173 |
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174 if (is) |
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175 { |
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176 buf << c; |
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177 |
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178 // Get a line of text whitespace characters included, leaving |
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4989
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179 // newline in the stream. |
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180 |
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4988
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181 while (is.peek () != '\n') |
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182 { |
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183 is.get (c); |
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184 if (! is) |
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185 break; |
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186 buf << c; |
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187 } |
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188 } |
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189 |
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190 int parse_status; |
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5765
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191 octave_value anon_fcn_handle = eval_string (buf.str (), true, |
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192 parse_status); |
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4988
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193 |
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4989
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194 if (parse_status == 0) |
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195 { |
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196 octave_fcn_handle *fh = anon_fcn_handle.fcn_handle_value (); |
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197 if (fh) |
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198 fcn = fh->fcn; |
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199 else |
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200 return false; |
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201 } |
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202 else |
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203 return false; |
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4988
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204 } |
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205 else |
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206 { |
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207 fcn = lookup_function (nm); |
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208 if (! fcn.is_function ()) |
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6225
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209 { |
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210 error ("function handle points to non-existent function"); |
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211 return false; |
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212 } |
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4988
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213 } |
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214 |
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215 return true; |
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216 } |
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217 |
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218 bool |
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219 octave_fcn_handle::save_binary (std::ostream& os, bool&) |
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220 { |
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5828
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221 int32_t tmp = nm.length (); |
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222 os.write (reinterpret_cast<char *> (&tmp), 4); |
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4988
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223 os.write (nm.c_str (), nm.length ()); |
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224 if (nm == "@<anonymous>") |
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225 { |
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5765
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226 std::ostringstream buf; |
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227 print_raw (buf, true); |
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5765
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228 std::string stmp = buf.str (); |
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229 tmp = stmp.length (); |
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230 os.write (reinterpret_cast<char *> (&tmp), 4); |
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4988
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231 os.write (stmp.c_str (), stmp.length ()); |
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232 } |
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233 return true; |
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234 } |
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235 |
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236 bool |
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237 octave_fcn_handle::load_binary (std::istream& is, bool swap, |
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238 oct_mach_info::float_format) |
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239 { |
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5828
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240 int32_t tmp; |
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5760
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241 if (! is.read (reinterpret_cast<char *> (&tmp), 4)) |
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242 return false; |
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243 if (swap) |
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244 swap_bytes<4> (&tmp); |
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245 |
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246 OCTAVE_LOCAL_BUFFER (char, ctmp1, tmp+1); |
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247 is.read (ctmp1, tmp); |
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248 nm = std::string (ctmp1); |
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249 |
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250 if (! is) |
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251 return false; |
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252 |
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253 if (nm == "@<anonymous>") |
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254 { |
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5760
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255 if (! is.read (reinterpret_cast<char *> (&tmp), 4)) |
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4988
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256 return false; |
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257 if (swap) |
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258 swap_bytes<4> (&tmp); |
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259 |
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260 OCTAVE_LOCAL_BUFFER (char, ctmp2, tmp+1); |
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261 is.read (ctmp2, tmp); |
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262 |
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263 int parse_status; |
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264 octave_value anon_fcn_handle = eval_string (ctmp2, true, parse_status); |
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265 |
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4989
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266 if (parse_status == 0) |
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267 { |
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268 octave_fcn_handle *fh = anon_fcn_handle.fcn_handle_value (); |
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269 if (fh) |
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270 fcn = fh->fcn; |
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271 else |
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272 return false; |
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273 } |
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274 else |
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275 return false; |
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4988
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276 } |
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277 else |
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278 { |
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279 fcn = lookup_function (nm); |
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280 if (! fcn.is_function ()) |
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6225
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281 { |
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282 error ("function handle points to non-existent function"); |
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283 return false; |
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284 } |
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4988
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285 } |
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286 return true; |
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287 } |
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288 |
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289 #if defined (HAVE_HDF5) |
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290 bool |
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291 octave_fcn_handle::save_hdf5 (hid_t loc_id, const char *name, |
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292 bool /* save_as_floats */) |
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293 { |
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294 hid_t group_hid = -1; |
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295 group_hid = H5Gcreate (loc_id, name, 0); |
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296 if (group_hid < 0 ) return false; |
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297 |
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298 hid_t space_hid = -1, data_hid = -1, type_hid = -1;; |
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299 bool retval = true; |
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300 |
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301 // attach the type of the variable |
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302 type_hid = H5Tcopy (H5T_C_S1); |
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303 H5Tset_size (type_hid, nm.length () + 1); |
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304 if (type_hid < 0) |
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305 { |
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306 H5Gclose (group_hid); |
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307 return false; |
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308 } |
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309 |
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310 OCTAVE_LOCAL_BUFFER (hsize_t, hdims, 2); |
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311 hdims[0] = 0; |
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312 hdims[1] = 0; |
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5760
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313 space_hid = H5Screate_simple (0 , hdims, 0); |
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4988
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314 if (space_hid < 0) |
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315 { |
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316 H5Tclose (type_hid); |
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317 H5Gclose (group_hid); |
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318 return false; |
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319 } |
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320 |
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321 data_hid = H5Dcreate (group_hid, "nm", type_hid, space_hid, H5P_DEFAULT); |
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322 if (data_hid < 0 || H5Dwrite (data_hid, type_hid, H5S_ALL, H5S_ALL, |
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5760
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323 H5P_DEFAULT, nm.c_str ()) < 0) |
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4988
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324 { |
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325 H5Sclose (space_hid); |
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326 H5Tclose (type_hid); |
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327 H5Gclose (group_hid); |
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328 return false; |
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329 } |
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330 H5Dclose (data_hid); |
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331 |
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332 if (nm == "@<anonymous>") |
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333 { |
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5765
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334 std::ostringstream buf; |
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4988
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335 print_raw (buf, true); |
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5765
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336 std::string stmp = buf.str (); |
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4988
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337 |
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338 // attach the type of the variable |
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339 H5Tset_size (type_hid, stmp.length () + 1); |
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340 if (type_hid < 0) |
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341 { |
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342 H5Gclose (group_hid); |
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343 return false; |
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344 } |
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345 |
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346 data_hid = H5Dcreate (group_hid, "fcn", type_hid, space_hid, |
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347 H5P_DEFAULT); |
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348 if (data_hid < 0 || H5Dwrite (data_hid, type_hid, H5S_ALL, H5S_ALL, |
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5760
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349 H5P_DEFAULT, stmp.c_str ()) < 0) |
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4988
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350 { |
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351 H5Sclose (space_hid); |
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352 H5Tclose (type_hid); |
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353 H5Gclose (group_hid); |
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354 return false; |
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355 } |
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356 |
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357 H5Dclose (data_hid); |
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358 } |
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359 |
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360 H5Sclose (space_hid); |
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361 H5Tclose (type_hid); |
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362 H5Gclose (group_hid); |
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363 |
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364 return retval; |
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365 } |
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366 |
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367 bool |
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368 octave_fcn_handle::load_hdf5 (hid_t loc_id, const char *name, |
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369 bool /* have_h5giterate_bug */) |
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370 { |
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371 hid_t group_hid, data_hid, space_hid, type_hid, type_class_hid, st_id; |
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372 hsize_t rank; |
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373 int slen; |
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374 |
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375 group_hid = H5Gopen (loc_id, name); |
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376 if (group_hid < 0 ) return false; |
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377 |
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378 data_hid = H5Dopen (group_hid, "nm"); |
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379 |
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380 if (data_hid < 0) |
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381 { |
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382 H5Gclose (group_hid); |
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383 return false; |
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384 } |
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385 |
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386 type_hid = H5Dget_type (data_hid); |
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387 type_class_hid = H5Tget_class (type_hid); |
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388 |
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389 if (type_class_hid != H5T_STRING) |
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390 { |
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391 H5Tclose (type_hid); |
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392 H5Dclose (data_hid); |
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393 H5Gclose (group_hid); |
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394 return false; |
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395 } |
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396 |
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397 space_hid = H5Dget_space (data_hid); |
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398 rank = H5Sget_simple_extent_ndims (space_hid); |
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399 |
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400 if (rank != 0) |
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401 { |
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402 H5Sclose (space_hid); |
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403 H5Tclose (type_hid); |
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404 H5Dclose (data_hid); |
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405 H5Gclose (group_hid); |
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406 return false; |
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407 } |
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408 |
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409 slen = H5Tget_size (type_hid); |
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410 if (slen < 0) |
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411 { |
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412 H5Sclose (space_hid); |
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413 H5Tclose (type_hid); |
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414 H5Dclose (data_hid); |
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415 H5Gclose (group_hid); |
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416 return false; |
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417 } |
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418 |
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419 OCTAVE_LOCAL_BUFFER (char, nm_tmp, slen); |
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420 |
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421 // create datatype for (null-terminated) string to read into: |
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422 st_id = H5Tcopy (H5T_C_S1); |
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423 H5Tset_size (st_id, slen); |
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424 |
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5760
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425 if (H5Dread (data_hid, st_id, H5S_ALL, H5S_ALL, H5P_DEFAULT, nm_tmp) < 0) |
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4988
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426 { |
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427 H5Sclose (space_hid); |
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428 H5Tclose (type_hid); |
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429 H5Gclose (group_hid); |
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430 return false; |
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431 } |
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432 H5Tclose (st_id); |
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433 H5Dclose (data_hid); |
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434 nm = nm_tmp; |
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435 |
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436 if (nm == "@<anonymous>") |
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437 { |
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438 data_hid = H5Dopen (group_hid, "fcn"); |
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439 |
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440 if (data_hid < 0) |
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441 { |
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442 H5Gclose (group_hid); |
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443 return false; |
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444 } |
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445 |
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446 type_hid = H5Dget_type (data_hid); |
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|
447 type_class_hid = H5Tget_class (type_hid); |
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448 |
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449 if (type_class_hid != H5T_STRING) |
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450 { |
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451 H5Tclose (type_hid); |
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452 H5Dclose (data_hid); |
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453 H5Gclose (group_hid); |
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454 return false; |
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|
455 } |
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456 |
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|
457 space_hid = H5Dget_space (data_hid); |
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|
458 rank = H5Sget_simple_extent_ndims (space_hid); |
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459 |
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460 if (rank != 0) |
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461 { |
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462 H5Sclose (space_hid); |
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|
463 H5Tclose (type_hid); |
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|
464 H5Dclose (data_hid); |
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465 H5Gclose (group_hid); |
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466 return false; |
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|
467 } |
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468 |
|
|
469 slen = H5Tget_size (type_hid); |
|
|
470 if (slen < 0) |
|
|
471 { |
|
|
472 H5Sclose (space_hid); |
|
|
473 H5Tclose (type_hid); |
|
|
474 H5Dclose (data_hid); |
|
|
475 H5Gclose (group_hid); |
|
|
476 return false; |
|
|
477 } |
|
|
478 |
|
|
479 OCTAVE_LOCAL_BUFFER (char, fcn_tmp, slen); |
|
|
480 |
|
|
481 // create datatype for (null-terminated) string to read into: |
|
|
482 st_id = H5Tcopy (H5T_C_S1); |
|
|
483 H5Tset_size (st_id, slen); |
|
|
484 |
|
5760
|
485 if (H5Dread (data_hid, st_id, H5S_ALL, H5S_ALL, H5P_DEFAULT, fcn_tmp) < 0) |
|
4988
|
486 { |
|
|
487 H5Sclose (space_hid); |
|
|
488 H5Tclose (type_hid); |
|
|
489 H5Gclose (group_hid); |
|
|
490 return false; |
|
|
491 } |
|
|
492 H5Dclose (data_hid); |
|
|
493 H5Tclose (st_id); |
|
|
494 |
|
|
495 int parse_status; |
|
|
496 octave_value anon_fcn_handle = eval_string (fcn_tmp, true, parse_status); |
|
|
497 |
|
4989
|
498 if (parse_status == 0) |
|
|
499 { |
|
|
500 octave_fcn_handle *fh = anon_fcn_handle.fcn_handle_value (); |
|
|
501 if (fh) |
|
|
502 fcn = fh->fcn; |
|
|
503 else |
|
|
504 return false; |
|
|
505 } |
|
|
506 else |
|
|
507 return false; |
|
4988
|
508 } |
|
|
509 else |
|
|
510 { |
|
|
511 fcn = lookup_function (nm); |
|
|
512 if (! fcn.is_function ()) |
|
6225
|
513 { |
|
|
514 error ("function handle points to non-existent function"); |
|
|
515 return false; |
|
|
516 } |
|
4988
|
517 } |
|
|
518 |
|
|
519 return true; |
|
|
520 } |
|
|
521 #endif |
|
|
522 |
|
4343
|
523 void |
|
|
524 octave_fcn_handle::print (std::ostream& os, bool pr_as_read_syntax) const |
|
|
525 { |
|
|
526 print_raw (os, pr_as_read_syntax); |
|
|
527 newline (os); |
|
|
528 } |
|
|
529 |
|
|
530 void |
|
|
531 octave_fcn_handle::print_raw (std::ostream& os, bool pr_as_read_syntax) const |
|
|
532 { |
|
4980
|
533 bool printed = false; |
|
|
534 |
|
|
535 if (nm == "@<anonymous>") |
|
|
536 { |
|
|
537 tree_print_code tpc (os); |
|
|
538 |
|
4989
|
539 // FCN is const because this member function is, so we can't |
|
4980
|
540 // use it to call user_function_value, so we make a copy first. |
|
|
541 |
|
|
542 octave_value ftmp = fcn; |
|
|
543 |
|
|
544 octave_user_function *f = ftmp.user_function_value (); |
|
|
545 |
|
|
546 if (f) |
|
|
547 { |
|
|
548 tree_parameter_list *p = f->parameter_list (); |
|
|
549 |
|
|
550 os << "@("; |
|
|
551 |
|
|
552 if (p) |
|
|
553 p->accept (tpc); |
|
|
554 |
|
|
555 os << ") "; |
|
|
556 |
|
|
557 tree_statement_list *b = f->body (); |
|
|
558 |
|
|
559 if (b) |
|
|
560 { |
|
|
561 assert (b->length () == 1); |
|
|
562 |
|
|
563 tree_statement *s = b->front (); |
|
|
564 |
|
|
565 if (s) |
|
|
566 { |
|
|
567 if (s->is_expression ()) |
|
|
568 { |
|
|
569 tree_expression *e = s->expression (); |
|
|
570 |
|
|
571 if (e) |
|
|
572 { |
|
|
573 if (e->is_assignment_expression ()) |
|
|
574 { |
|
|
575 // The parser builds an assignment to |
|
|
576 // __retval__, and we don't want to |
|
|
577 // display that part. |
|
|
578 |
|
|
579 tree_simple_assignment *tsa |
|
|
580 = reinterpret_cast <tree_simple_assignment *> (e); |
|
|
581 tree_expression *rhs = tsa->right_hand_side (); |
|
|
582 |
|
|
583 if (rhs) |
|
|
584 rhs->accept (tpc); |
|
|
585 } |
|
|
586 else |
|
|
587 e->accept (tpc); |
|
|
588 } |
|
|
589 } |
|
|
590 else |
|
|
591 { |
|
|
592 tree_command *c = s->command (); |
|
|
593 |
|
|
594 tpc.suspend_newline (); |
|
|
595 c->accept (tpc); |
|
|
596 tpc.resume_newline (); |
|
|
597 } |
|
|
598 } |
|
|
599 } |
|
|
600 |
|
|
601 printed = true; |
|
|
602 } |
|
|
603 } |
|
|
604 |
|
|
605 if (! printed) |
|
|
606 octave_print_internal (os, nm, pr_as_read_syntax, |
|
|
607 current_print_indent_level ()); |
|
4343
|
608 } |
|
|
609 |
|
|
610 octave_value |
|
|
611 make_fcn_handle (const std::string& nm) |
|
|
612 { |
|
|
613 octave_value retval; |
|
|
614 |
|
6323
|
615 octave_function *fcn = octave_call_stack::current (); |
|
|
616 |
|
6351
|
617 octave_value f = lookup_function (nm, fcn ? fcn->name () : std::string ()); |
|
4343
|
618 |
|
4930
|
619 if (f.is_function ()) |
|
|
620 retval = octave_value (new octave_fcn_handle (f, nm)); |
|
4343
|
621 else |
|
|
622 error ("error creating function handle \"@%s\"", nm.c_str ()); |
|
|
623 |
|
|
624 return retval; |
|
|
625 } |
|
|
626 |
|
4933
|
627 DEFUN (functions, args, , |
|
4343
|
628 "-*- texinfo -*-\n\ |
|
4933
|
629 @deftypefn {Built-in Function} {} functions (@var{fcn_handle})\n\ |
|
|
630 Return a struct containing information about the function handle\n\ |
|
|
631 @var{fcn_handle}.\n\ |
|
|
632 @end deftypefn") |
|
4343
|
633 { |
|
|
634 octave_value retval; |
|
|
635 |
|
4933
|
636 if (args.length () == 1) |
|
4343
|
637 { |
|
4933
|
638 octave_fcn_handle *fh = args(0).fcn_handle_value (); |
|
4343
|
639 |
|
|
640 if (! error_state) |
|
|
641 { |
|
4933
|
642 octave_function *fcn = fh ? fh->function_value (true) : 0; |
|
4343
|
643 |
|
4933
|
644 if (fcn) |
|
4930
|
645 { |
|
4933
|
646 Octave_map m; |
|
4649
|
647 |
|
4933
|
648 std::string fh_nm = fh->fcn_name (); |
|
|
649 |
|
4978
|
650 m.assign ("function", fh_nm); |
|
4343
|
651 |
|
4933
|
652 if (fcn->is_nested_function ()) |
|
|
653 m.assign ("type", "subfunction"); |
|
|
654 else |
|
|
655 m.assign ("type", "simple"); |
|
|
656 |
|
|
657 std::string nm = fcn->fcn_file_name (); |
|
4343
|
658 |
|
4933
|
659 if (nm.empty ()) |
|
4935
|
660 { |
|
|
661 if (fh_nm == "@<anonymous>") |
|
|
662 m.assign ("file", "none"); |
|
5313
|
663 else if (fcn->is_user_function ()) |
|
|
664 m.assign ("file", "command-line function"); |
|
4935
|
665 else |
|
|
666 m.assign ("file", "built-in function"); |
|
|
667 } |
|
4343
|
668 else |
|
4933
|
669 m.assign ("file", nm); |
|
|
670 |
|
|
671 retval = m; |
|
4343
|
672 } |
|
|
673 else |
|
4933
|
674 error ("functions: invalid function handle object"); |
|
4343
|
675 } |
|
|
676 else |
|
4933
|
677 error ("functions: argument must be a function handle object"); |
|
4343
|
678 } |
|
|
679 else |
|
5823
|
680 print_usage (); |
|
4343
|
681 |
|
|
682 return retval; |
|
|
683 } |
|
|
684 |
|
4933
|
685 DEFUN (func2str, args, , |
|
4343
|
686 "-*- texinfo -*-\n\ |
|
4933
|
687 @deftypefn {Built-in Function} {} func2str (@var{fcn_handle})\n\ |
|
|
688 Return a string containing the name of the function referenced by\n\ |
|
|
689 the function handle @var{fcn_handle}.\n\ |
|
|
690 @end deftypefn") |
|
4343
|
691 { |
|
|
692 octave_value retval; |
|
|
693 |
|
4933
|
694 if (args.length () == 1) |
|
4930
|
695 { |
|
4933
|
696 octave_fcn_handle *fh = args(0).fcn_handle_value (); |
|
4930
|
697 |
|
4933
|
698 if (! error_state && fh) |
|
|
699 { |
|
|
700 std::string fh_nm = fh->fcn_name (); |
|
6416
|
701 |
|
|
702 if (fh_nm == "@<anonymous>") |
|
|
703 { |
|
|
704 std::ostringstream buf; |
|
|
705 |
|
|
706 fh->print_raw (buf); |
|
|
707 |
|
|
708 retval = buf.str (); |
|
|
709 } |
|
|
710 else |
|
|
711 retval = fh_nm; |
|
4933
|
712 } |
|
4343
|
713 else |
|
4933
|
714 error ("func2str: expecting valid function handle as first argument"); |
|
4343
|
715 } |
|
|
716 else |
|
5823
|
717 print_usage (); |
|
4343
|
718 |
|
|
719 return retval; |
|
|
720 } |
|
|
721 |
|
4933
|
722 DEFUN (str2func, args, , |
|
4343
|
723 "-*- texinfo -*-\n\ |
|
4933
|
724 @deftypefn {Built-in Function} {} str2func (@var{fcn_name})\n\ |
|
|
725 Return a function handle constructed from the string @var{fcn_name}.\n\ |
|
|
726 @end deftypefn") |
|
4343
|
727 { |
|
|
728 octave_value retval; |
|
|
729 |
|
4933
|
730 if (args.length () == 1) |
|
4343
|
731 { |
|
4933
|
732 std::string nm = args(0).string_value (); |
|
4343
|
733 |
|
4933
|
734 if (! error_state) |
|
|
735 retval = make_fcn_handle (nm); |
|
4343
|
736 else |
|
4933
|
737 error ("str2func: expecting string as first argument"); |
|
4343
|
738 } |
|
|
739 else |
|
5823
|
740 print_usage (); |
|
4343
|
741 |
|
|
742 return retval; |
|
|
743 } |
|
|
744 |
|
|
745 /* |
|
|
746 ;;; Local Variables: *** |
|
|
747 ;;; mode: C++ *** |
|
|
748 ;;; End: *** |
|
|
749 */ |
