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1 // tree-const.cc -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1992, 1993, 1994 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, write to the Free |
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20 Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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21 |
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22 */ |
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23 |
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240
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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 #if defined (__GNUG__) |
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29 #pragma implementation |
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30 #endif |
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31 |
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32 #include <iostream.h> |
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33 |
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34 #include "tree-const.h" |
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35 #include "error.h" |
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36 #include "gripes.h" |
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37 #include "user-prefs.h" |
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38 #include "oct-map.h" |
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39 |
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40 Octave_map |
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41 tree_constant::map_value (void) const |
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42 { |
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43 return rep->map_value (); |
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44 } |
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45 |
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46 tree_constant::~tree_constant (void) |
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47 { |
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48 #if defined (MDEBUG) |
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49 cerr << "~tree_constant: rep: " << rep |
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50 << " rep->count: " << rep->count << "\n"; |
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51 #endif |
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52 |
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53 if (--rep->count <= 0) |
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54 { |
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55 delete rep; |
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56 rep = 0; |
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57 } |
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58 } |
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59 |
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60 #if defined (MDEBUG) |
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61 void * |
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62 tree_constant::operator new (size_t size) |
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63 { |
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64 tree_constant *p = ::new tree_constant; |
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65 cerr << "tree_constant::new(): " << p << "\n"; |
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66 return p; |
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67 } |
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68 |
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69 void |
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70 tree_constant::operator delete (void *p, size_t size) |
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71 { |
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72 cerr << "tree_constant::delete(): " << p << "\n"; |
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73 ::delete p; |
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74 } |
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75 #endif |
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76 |
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77 // Simple assignment. |
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78 |
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79 tree_constant |
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80 tree_constant::operator = (const tree_constant& a) |
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81 { |
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82 if (rep != a.rep) |
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83 { |
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84 if (--rep->count <= 0) |
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85 delete rep; |
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86 rep = a.rep; |
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87 rep->count++; |
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88 } |
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89 return *this; |
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90 } |
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91 |
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92 tree_constant |
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93 tree_constant::lookup_map_element (SLList<char*>& list) |
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94 { |
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95 tree_constant retval; |
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96 |
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97 tree_constant_rep *tmp_rep = rep; |
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98 |
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99 Pix p = list.first (); |
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100 while (p) |
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101 { |
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102 char *elt = list (p); |
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103 |
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104 list.next (p); |
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105 |
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106 tree_constant tmp = tmp_rep->lookup_map_element (elt); |
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107 |
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108 if (error_state) |
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109 break; |
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110 |
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111 tmp_rep = tmp.rep; |
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112 |
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113 if (! p) |
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114 retval = tmp; |
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115 } |
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116 |
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117 return retval; |
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118 } |
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119 |
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120 // Simple structure assignment. |
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121 |
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122 void |
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123 tree_constant::make_unique (void) |
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124 { |
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125 if (rep->count > 1) |
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126 { |
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127 --rep->count; |
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128 rep = new tree_constant_rep (*rep); |
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129 rep->count = 1; |
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130 } |
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131 |
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132 if (rep->is_map ()) |
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133 { |
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134 for (Pix p = rep->a_map->first (); p != 0; rep->a_map->next (p)) |
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135 { |
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136 rep->a_map->contents (p) . make_unique (); |
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137 } |
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138 } |
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139 } |
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140 |
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141 tree_constant::tree_constant_rep * |
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142 tree_constant::make_unique_map (void) |
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143 { |
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144 if (! rep->is_map ()) |
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145 { |
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146 if (--rep->count <= 0) |
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147 delete rep; |
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148 |
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149 Octave_map m; |
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150 rep = new tree_constant_rep (m); |
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151 rep->count = 1; |
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152 } |
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153 |
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154 make_unique (); |
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155 |
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156 return rep; |
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157 } |
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158 |
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159 tree_constant |
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160 tree_constant::assign_map_element (SLList<char*>& list, |
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161 tree_constant& rhs) |
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162 { |
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163 tree_constant_rep *tmp_rep = make_unique_map (); |
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164 |
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165 if (rhs.is_map ()) |
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166 rhs.make_unique (); |
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167 |
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168 Pix p = list.first (); |
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169 while (p) |
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170 { |
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171 char *elt = list (p); |
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172 |
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173 list.next (p); |
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174 |
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175 tree_constant& tmp = tmp_rep->lookup_map_element (elt, 1); |
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176 |
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177 if (! p) |
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178 { |
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179 tmp = rhs; |
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180 return tmp; |
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181 } |
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182 |
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183 tmp_rep = tmp.make_unique_map (); |
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184 } |
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185 |
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186 return tree_constant (); |
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187 } |
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188 |
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189 // Indexed structure assignment. |
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190 |
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191 tree_constant |
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192 tree_constant::assign_map_element (SLList<char*>& list, |
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193 tree_constant& rhs, |
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194 const Octave_object& args) |
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195 { |
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196 tree_constant_rep *tmp_rep = make_unique_map (); |
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197 |
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198 if (rhs.is_map ()) |
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199 rhs.make_unique (); |
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200 |
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201 Pix p = list.first (); |
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202 while (p) |
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203 { |
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204 char *elt = list (p); |
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205 |
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206 list.next (p); |
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207 |
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208 tree_constant& tmp = tmp_rep->lookup_map_element (elt, 1); |
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209 |
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210 if (! p) |
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211 { |
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212 tmp.assign (rhs, args); |
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213 return tmp; |
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214 } |
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215 |
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216 tmp_rep = tmp.make_unique_map (); |
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217 } |
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218 |
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219 return tree_constant (); |
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220 } |
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221 |
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222 void |
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223 tree_constant::print_code (ostream& os) |
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224 { |
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225 print_code_indent (os); |
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226 |
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227 if (in_parens) |
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228 os << "("; |
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229 |
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230 if (rep) |
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231 rep->print_code (os); |
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232 |
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233 if (in_parens) |
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234 os << ")"; |
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235 } |
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236 |
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237 // Construct return vector of empty matrices. Return empty matrices |
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238 // and/or gripe when appropriate. |
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239 |
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240 Octave_object |
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241 vector_of_empties (int nargout, const char *fcn_name) |
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96
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242 { |
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243 Octave_object retval; |
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96
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244 |
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245 // Got an empty argument, check if should gripe/return empty values. |
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246 |
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247 int flag = user_pref.propagate_empty_matrices; |
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248 if (flag != 0) |
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249 { |
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250 if (flag < 0) |
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251 gripe_empty_arg (fcn_name, 0); |
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252 |
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253 Matrix m; |
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500
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254 retval.resize (nargout ? nargout : 1); |
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96
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255 for (int i = 0; i < nargout; i++) |
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256 retval(i) = m; |
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96
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257 } |
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258 else |
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259 gripe_empty_arg (fcn_name, 1); |
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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 /* |
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265 ;;; Local Variables: *** |
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266 ;;; mode: C++ *** |
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267 ;;; page-delimiter: "^/\\*" *** |
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268 ;;; End: *** |
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269 */ |
