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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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 #if defined (__GNUG__) && defined (USE_PRAGMA_INTERFACE_IMPLEMENTATION) |
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24 #pragma implementation |
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25 #endif |
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26 |
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27 #ifdef HAVE_CONFIG_H |
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28 #include <config.h> |
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29 #endif |
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30 |
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31 #include <iostream> |
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32 |
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33 #include "defun.h" |
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34 #include "error.h" |
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35 #include "gripes.h" |
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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-base-mat.h" |
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39 #include "ov-base-mat.cc" |
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40 #include "ov-fcn-handle.h" |
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41 #include "pr-output.h" |
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42 #include "variables.h" |
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43 |
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44 // Instantiate Arrays of fcn_handle_elt values. |
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45 |
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46 #include "Array.h" |
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47 #include "Array.cc" |
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48 |
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49 INSTANTIATE_ARRAY_AND_ASSIGN (fcn_handle_elt); |
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50 |
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51 #include "Array2.h" |
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52 |
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53 template class Array2<fcn_handle_elt>; |
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54 |
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55 #include "ArrayN.h" |
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56 #include "ArrayN.cc" |
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57 |
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58 template class ArrayN<fcn_handle_elt>; |
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59 |
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60 template class octave_base_matrix<fcn_handle_array>; |
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61 |
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62 boolNDArray |
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63 fcn_handle_array::all (int) const |
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64 { |
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65 error ("all: invalid call for function handle object"); |
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66 return boolNDArray (); |
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67 } |
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68 |
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69 boolNDArray |
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70 fcn_handle_array::any (int) const |
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71 { |
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72 error ("any: invalid call for function handle object"); |
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73 return boolNDArray (); |
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74 } |
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75 |
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76 DEFINE_OCTAVE_ALLOCATOR (octave_fcn_handle); |
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77 |
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78 DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA (octave_fcn_handle, |
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79 "function handle", |
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80 "function handle"); |
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81 |
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82 octave_value_list |
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83 octave_fcn_handle::subsref (const std::string& type, |
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84 const std::list<octave_value_list>& idx, |
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85 int nargout) |
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86 { |
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87 octave_value_list retval; |
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88 |
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89 switch (type[0]) |
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90 { |
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91 case '(': |
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92 { |
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93 octave_function *f = function_value (); |
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94 retval = f->subsref (type, idx, nargout); |
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95 } |
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96 break; |
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97 |
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98 |
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99 case '{': |
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100 case '.': |
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101 { |
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102 std::string nm = type_name (); |
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103 error ("%s cannot be indexed with %c", nm.c_str (), type[0]); |
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104 } |
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105 break; |
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106 |
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107 default: |
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108 panic_impossible (); |
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109 } |
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110 |
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111 // XXX FIXME XXX -- perhaps there should be an |
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112 // octave_value_list::next_subsref member function? See also |
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113 // octave_builtin::subsref. |
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114 |
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115 if (idx.size () > 1) |
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116 retval = retval(0).next_subsref (type, idx); |
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117 |
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118 return retval; |
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119 } |
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120 |
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121 octave_function * |
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122 octave_fcn_handle::function_value (bool) |
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123 { |
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124 octave_function *retval = 0; |
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125 |
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126 if (numel () > 0) |
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127 { |
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128 // XXX FIXME XXX -- is warn_fortran_indexing the right variable here? |
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129 if (Vwarn_fortran_indexing) |
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130 gripe_implicit_conversion ("function handle array", |
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131 "scalar function handle"); |
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132 |
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133 fcn_handle_elt elt = matrix(0); |
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134 |
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135 retval = elt.function_value (); |
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136 } |
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137 else |
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138 gripe_invalid_conversion ("function handle array", |
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139 "scalar function handle"); |
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140 |
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141 return retval; |
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142 } |
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143 |
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144 std::string |
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145 octave_fcn_handle::name (void) const |
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146 { |
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147 std::string retval; |
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148 |
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149 if (numel () > 0) |
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150 { |
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151 // XXX FIXME XXX -- is warn_fortran_indexing the right variable here? |
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152 if (Vwarn_fortran_indexing) |
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153 gripe_implicit_conversion ("function handle array", |
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154 "scalar function handle"); |
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155 |
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156 fcn_handle_elt elt = matrix(0); |
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157 |
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158 retval = elt.name (); |
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159 } |
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160 else |
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161 gripe_invalid_conversion ("function handle array", |
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162 "scalar function handle"); |
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163 |
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164 return retval; |
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165 } |
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166 |
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167 ArrayN<std::string> |
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168 fcn_handle_array::names (void) const |
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169 { |
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170 ArrayN<std::string> retval (dims ()); |
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171 |
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172 int nel = length (); |
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173 |
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174 for (int i = 0; i < nel; i++) |
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175 { |
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176 fcn_handle_elt elt = elem (i); |
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177 |
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178 retval(i) = elt.name (); |
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179 } |
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180 |
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181 return retval; |
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182 } |
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183 |
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184 void |
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185 octave_fcn_handle::print (std::ostream& os, bool pr_as_read_syntax) const |
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186 { |
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187 print_raw (os, pr_as_read_syntax); |
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188 newline (os); |
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189 } |
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190 |
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191 void |
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192 octave_fcn_handle::print_raw (std::ostream& os, bool pr_as_read_syntax) const |
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193 { |
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194 octave_print_internal (os, name_array (), pr_as_read_syntax, |
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195 current_print_indent_level ()); |
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196 } |
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197 |
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198 octave_value |
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199 make_fcn_handle (const std::string& nm) |
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200 { |
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201 octave_value retval; |
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202 |
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203 octave_function *f = lookup_function (nm); |
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204 |
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205 if (f) |
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206 return fcn_handle_array (f, nm); |
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207 else |
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208 error ("error creating function handle \"@%s\"", nm.c_str ()); |
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209 |
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210 return retval; |
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211 } |
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212 |
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213 DEFUN (functions, args, , |
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214 "-*- texinfo -*-\n\ |
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215 @deftypefn {Built-in Function} {} functions (@var{fcn_handle})\n\ |
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216 Return a struct containing information about the function handle\n\ |
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217 @var{fcn_handle}.\n\ |
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218 @end deftypefn") |
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219 { |
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220 octave_value retval; |
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221 |
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222 if (args.length () == 1) |
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223 { |
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224 octave_fcn_handle *fh = args(0).fcn_handle_value (); |
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225 |
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226 if (! error_state) |
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227 { |
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228 octave_function *fcn = fh ? fh->function_value (true) : 0; |
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229 |
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230 if (fcn) |
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231 { |
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232 Octave_map m; |
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233 |
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234 std::string fh_nm = fh->name (); |
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235 |
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236 m.assign ("function", fh_nm.substr (1)); |
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237 |
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238 if (fcn->is_nested_function ()) |
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239 m.assign ("type", "subfunction"); |
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240 else |
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241 m.assign ("type", "simple"); |
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242 |
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243 std::string nm = fcn->fcn_file_name (); |
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244 |
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245 if (nm.empty ()) |
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246 m.assign ("file", "built-in function"); |
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247 else |
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248 m.assign ("file", nm); |
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249 |
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250 retval = m; |
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251 } |
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252 else |
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253 error ("functions: invalid function handle object"); |
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254 } |
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255 else |
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256 error ("functions: argument must be a function handle object"); |
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257 } |
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258 else |
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259 print_usage ("functions"); |
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260 |
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261 return retval; |
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262 } |
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263 |
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264 DEFUN (func2str, args, , |
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265 "-*- texinfo -*-\n\ |
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266 @deftypefn {Built-in Function} {} func2str (@var{fcn_handle})\n\ |
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267 Return a string containing the name of the function referenced by\n\ |
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268 the function handle @var{fcn_handle}.\n\ |
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269 @end deftypefn") |
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270 { |
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271 octave_value retval; |
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272 |
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273 if (args.length () == 1) |
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274 { |
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275 octave_fcn_handle *fh = args(0).fcn_handle_value (); |
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276 |
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277 if (! error_state && fh) |
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278 { |
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279 std::string fh_nm = fh->name (); |
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280 retval = fh_nm.substr (1); |
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281 } |
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282 else |
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283 error ("func2str: expecting valid function handle as first argument"); |
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284 } |
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285 else |
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286 print_usage ("func2str"); |
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287 |
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288 return retval; |
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289 } |
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290 |
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291 DEFUN (str2func, args, , |
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292 "-*- texinfo -*-\n\ |
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293 @deftypefn {Built-in Function} {} str2func (@var{fcn_name})\n\ |
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294 Return a function handle constructed from the string @var{fcn_name}.\n\ |
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295 @end deftypefn") |
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296 { |
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297 octave_value retval; |
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298 |
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299 if (args.length () == 1) |
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300 { |
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301 std::string nm = args(0).string_value (); |
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302 |
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303 if (! error_state) |
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304 retval = make_fcn_handle (nm); |
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305 else |
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306 error ("str2func: expecting string as first argument"); |
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307 } |
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308 else |
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309 print_usage ("str2func"); |
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310 |
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311 return retval; |
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312 } |
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313 |
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314 /* |
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315 ;;; Local Variables: *** |
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316 ;;; mode: C++ *** |
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317 ;;; End: *** |
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318 */ |
