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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 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__) |
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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 "ov-typeinfo.h" |
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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 "oct-obj.h" |
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36 |
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37 const int |
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38 octave_value_typeinfo::init_tab_sz (16); |
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39 |
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40 octave_value_typeinfo * |
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41 octave_value_typeinfo::instance (0); |
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42 |
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43 #include <Array.cc> |
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44 #include <Array2.cc> |
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45 #include <Array3.cc> |
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46 |
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47 template class Array<binary_op_fcn>; |
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48 template class Array2<binary_op_fcn>; |
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49 template class Array3<binary_op_fcn>; |
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50 |
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51 template class Array<assign_op_fcn>; |
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52 template class Array2<assign_op_fcn>; |
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53 template class Array3<assign_op_fcn>; |
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54 |
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55 template class Array<type_conv_fcn>; |
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56 template class Array2<type_conv_fcn>; |
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57 |
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58 bool |
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59 octave_value_typeinfo::instance_ok (void) |
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60 { |
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61 bool retval = true; |
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62 if (! instance) |
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63 instance = new octave_value_typeinfo (); |
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64 |
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65 if (! instance) |
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66 { |
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67 ::error ("unable to create value type info object!"); |
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68 |
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69 retval = false; |
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70 } |
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71 |
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72 return retval; |
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73 } |
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74 |
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75 int |
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76 octave_value_typeinfo::register_type (const string& name) |
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77 { |
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78 return (instance_ok ()) |
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79 ? instance->do_register_type (name) : -1; |
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80 } |
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81 |
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82 bool |
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83 octave_value_typeinfo::register_binary_op (octave_value::binary_op op, |
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84 int t1, int t2, |
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85 binary_op_fcn f) |
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86 { |
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87 return (instance_ok ()) |
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88 ? instance->do_register_binary_op (op, t1, t2, f) : false; |
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89 } |
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90 |
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91 bool |
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92 octave_value_typeinfo::register_assign_op (octave_value::assign_op op, |
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93 int t_lhs, int t_rhs, |
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94 assign_op_fcn f) |
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95 { |
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96 return (instance_ok ()) |
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97 ? instance->do_register_assign_op (op, t_lhs, t_rhs, f) : -1; |
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98 } |
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99 |
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100 bool |
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101 octave_value_typeinfo::register_pref_assign_conv (int t_lhs, int t_rhs, |
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102 int t_result) |
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103 { |
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104 return (instance_ok ()) |
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105 ? instance->do_register_pref_assign_conv (t_lhs, t_rhs, t_result) : false; |
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106 } |
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107 |
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108 bool |
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109 octave_value_typeinfo::register_widening_op (int t, int t_result, |
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110 type_conv_fcn f) |
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111 { |
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112 return (instance_ok ()) |
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113 ? instance->do_register_widening_op (t, t_result, f) : false; |
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114 } |
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115 |
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116 int |
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117 octave_value_typeinfo::do_register_type (const string& name) |
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118 { |
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119 int i = 0; |
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120 |
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121 for (i = 0; i < num_types; i++) |
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122 if (name == types (i)) |
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123 return i; |
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124 |
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125 int len = types.length (); |
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126 |
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127 if (i == len) |
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128 { |
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129 len *= 2; |
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130 |
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131 types.resize (len, string ()); |
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132 |
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133 binary_ops.resize (static_cast<int> (octave_value::num_binary_ops), |
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134 len, len, static_cast<binary_op_fcn> (0)); |
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135 |
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136 assign_ops.resize (static_cast<int> (octave_value::num_assign_ops), |
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137 len, len, static_cast<assign_op_fcn> (0)); |
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138 |
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139 pref_assign_conv.resize (len, len, -1); |
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140 |
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141 widening_ops.resize (len, len, static_cast<type_conv_fcn> (0)); |
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142 } |
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143 |
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144 types (i) = name; |
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145 |
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146 num_types++; |
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147 |
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148 return i; |
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149 } |
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150 |
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151 bool |
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152 octave_value_typeinfo::do_register_binary_op (octave_value::binary_op op, |
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153 int t1, int t2, |
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154 binary_op_fcn f) |
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155 { |
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156 binary_ops.checkelem (static_cast<int> (op), t1, t2) = f; |
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157 |
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158 return false; |
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159 } |
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160 |
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161 bool |
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162 octave_value_typeinfo::do_register_assign_op (octave_value::assign_op op, |
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163 int t_lhs, int t_rhs, |
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164 assign_op_fcn f) |
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165 { |
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166 assign_ops.checkelem (static_cast<int> (op), t_lhs, t_rhs) = f; |
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167 |
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168 return false; |
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169 } |
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170 |
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171 bool |
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172 octave_value_typeinfo::do_register_pref_assign_conv (int t_lhs, int t_rhs, |
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173 int t_result) |
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174 { |
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175 pref_assign_conv.checkelem (t_lhs, t_rhs) = t_result; |
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176 |
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177 return false; |
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178 } |
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179 |
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180 bool |
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181 octave_value_typeinfo::do_register_widening_op |
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182 (int t, int t_result, type_conv_fcn f) |
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183 { |
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184 widening_ops.checkelem (t, t_result) = f; |
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185 |
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186 return false; |
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187 } |
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188 |
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189 #include <iostream.h> |
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190 |
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191 binary_op_fcn |
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192 octave_value_typeinfo::do_lookup_binary_op (octave_value::binary_op op, |
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193 int t1, int t2) |
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194 { |
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195 return binary_ops.checkelem (static_cast<int> (op), t1, t2); |
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196 } |
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197 |
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198 assign_op_fcn |
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199 octave_value_typeinfo::do_lookup_assign_op (octave_value::assign_op op, |
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200 int t_lhs, int t_rhs) |
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201 { |
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202 return assign_ops.checkelem (static_cast<int> (op), t_lhs, t_rhs); |
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203 } |
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204 |
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205 int |
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206 octave_value_typeinfo::do_lookup_pref_assign_conv (int t_lhs, int t_rhs) |
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207 { |
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208 return pref_assign_conv.checkelem (t_lhs, t_rhs); |
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209 } |
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210 |
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211 type_conv_fcn |
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212 octave_value_typeinfo::do_lookup_widening_op (int t, int t_result) |
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213 { |
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214 return widening_ops.checkelem (t, t_result); |
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215 } |
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216 |
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217 string_vector |
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218 octave_value_typeinfo::do_installed_type_names (void) |
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219 { |
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220 string_vector retval (num_types); |
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221 |
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222 for (int i = 0;i < num_types; i++) |
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223 retval (i) = types (i); |
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224 |
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225 return retval; |
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226 } |
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227 |
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228 DEFUN (typeinfo, args, , |
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229 "usage: typeinfo (expr)\n\ |
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230 \n\ |
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231 Return the type of the expression EXPR, as a string. If EXPR is\n\ |
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232 omitted, return an array of strings containing all the currently\n\ |
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233 installed data types.") |
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234 { |
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235 octave_value retval; |
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236 |
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237 int nargin = args.length (); |
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238 |
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239 if (nargin == 0) |
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240 retval = octave_value_typeinfo::installed_type_names (); |
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241 else if (nargin == 1) |
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242 retval = args(0).type_name (); |
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243 else |
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244 print_usage ("typeinfo"); |
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245 |
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246 return retval; |
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247 } |
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248 |
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249 /* |
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250 ;;; Local Variables: *** |
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251 ;;; mode: C++ *** |
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252 ;;; End: *** |
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253 */ |
