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529
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1 // tree-expr.cc -*- C++ -*- |
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494
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2 /* |
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3 |
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1009
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4 Copyright (C) 1992, 1993, 1994, 1995 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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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 <sys/types.h> |
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29 #ifdef HAVE_UNISTD_H |
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30 #include <unistd.h> |
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31 #endif |
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32 |
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33 #include <iostream.h> |
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34 #include <strstream.h> |
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663
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35 #include <string.h> |
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494
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36 #include <limits.h> |
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37 #include <ctype.h> |
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38 #include <stdio.h> |
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39 |
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40 #include "variables.h" |
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41 #include "user-prefs.h" |
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704
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42 #include "dynamic-ld.h" |
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543
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43 #include "help.h" |
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494
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44 #include "error.h" |
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777
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45 #include "gripes.h" |
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494
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46 #include "pager.h" |
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584
|
47 #include "tree-base.h" |
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494
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48 #include "tree-expr.h" |
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578
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49 #include "tree-misc.h" |
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494
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50 #include "tree-const.h" |
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51 #include "input.h" |
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52 #include "symtab.h" |
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53 #include "utils.h" |
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54 #include "octave.h" |
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55 #include "octave-hist.h" |
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56 #include "unwind-prot.h" |
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57 #include "parse.h" |
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58 #include "lex.h" |
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529
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59 #include "defun.h" |
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494
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60 |
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61 // Nonzero means we're returning from a function. |
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62 extern int returning; |
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63 |
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1060
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64 // Nonzero means we're breaking out of a loop or function body. |
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65 extern int breaking; |
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66 |
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494
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67 // But first, some extra functions used by the tree classes. |
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68 |
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69 // We seem to have no use for this now. Maybe it will be needed at |
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70 // some future date, so here it is. |
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71 #if 0 |
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578
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72 // Convert a linked list of trees to a vector of pointers to trees. |
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73 |
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494
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74 static tree ** |
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75 list_to_vector (tree *list, int& len) |
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76 { |
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77 len = list->length () + 1; |
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78 |
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79 tree **args = new tree * [len]; |
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80 |
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81 // args[0] may eventually hold something useful, like the function |
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82 // name. |
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83 tree *tmp_list = list; |
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84 for (int k = 1; k < len; k++) |
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85 { |
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86 args[k] = tmp_list; |
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87 tmp_list = tmp_list->next_elem (); |
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88 } |
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89 return args; |
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90 } |
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91 #endif |
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92 |
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93 static int |
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767
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94 any_element_less_than (const Matrix& a, double val) |
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95 { |
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96 int nr = a.rows (); |
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97 int nc = a.columns (); |
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98 for (int j = 0; j < nc; j++) |
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99 for (int i = 0; i < nr; i++) |
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100 if (a.elem (i, j) < val) |
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101 return 1; |
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102 return 0; |
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103 } |
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104 |
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105 static int |
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106 any_element_greater_than (const Matrix& a, double val) |
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107 { |
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108 int nr = a.rows (); |
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109 int nc = a.columns (); |
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110 for (int j = 0; j < nc; j++) |
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111 for (int i = 0; i < nr; i++) |
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112 if (a.elem (i, j) > val) |
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113 return 1; |
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114 return 0; |
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115 } |
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116 |
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117 static int |
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494
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118 print_as_scalar (const tree_constant& val) |
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119 { |
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120 int nr = val.rows (); |
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121 int nc = val.columns (); |
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122 return (val.is_scalar_type () |
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610
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123 || val.is_string () |
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494
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124 || (val.is_matrix_type () |
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125 && ((nr == 1 && nc == 1) |
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126 || nr == 0 |
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127 || nc == 0))); |
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128 } |
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129 |
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749
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130 static void |
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131 print_constant (tree_constant& tc, char *name) |
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132 { |
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133 int pad_after = 0; |
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134 if (user_pref.print_answer_id_name) |
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135 { |
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136 if (print_as_scalar (tc)) |
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137 { |
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138 ostrstream output_buf; |
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139 output_buf << name << " = " << ends; |
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140 maybe_page_output (output_buf); |
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141 } |
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142 else |
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143 { |
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144 pad_after = 1; |
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145 ostrstream output_buf; |
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146 output_buf << name << " =\n\n" << ends; |
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147 maybe_page_output (output_buf); |
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148 } |
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149 } |
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150 |
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151 tc.eval (1); |
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152 |
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153 if (pad_after) |
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154 { |
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155 ostrstream output_buf; |
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156 output_buf << "\n" << ends; |
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157 maybe_page_output (output_buf); |
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158 } |
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159 } |
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160 |
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578
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161 // Make sure that all arguments have values. |
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162 |
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494
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163 static int |
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506
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164 all_args_defined (const Octave_object& args) |
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494
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165 { |
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506
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166 int nargin = args.length (); |
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167 |
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712
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168 for (int i = 0; i < nargin; i++) |
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169 if (args(i).is_undefined ()) |
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170 return 0; |
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171 |
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494
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172 return 1; |
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173 } |
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174 |
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578
|
175 // Are any of the arguments `:'? |
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176 |
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494
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177 static int |
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506
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178 any_arg_is_magic_colon (const Octave_object& args) |
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494
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179 { |
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506
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180 int nargin = args.length (); |
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181 |
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712
|
182 for (int i = 0; i < nargin; i++) |
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183 if (args(i).is_magic_colon ()) |
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494
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184 return 1; |
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712
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185 |
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494
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186 return 0; |
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187 } |
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188 |
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581
|
189 // Expressions. |
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190 |
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191 tree_constant |
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192 tree_expression::eval (int print) |
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193 { |
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194 panic ("invalid evaluation of generic expression"); |
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195 return tree_constant (); |
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196 } |
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197 |
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578
|
198 // General matrices. This list type is much more work to handle than |
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199 // constant matrices, but it allows us to construct matrices from |
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200 // other matrices, variables, and functions. |
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494
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201 |
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202 tree_matrix::~tree_matrix (void) |
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203 { |
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204 delete element; |
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205 delete next; |
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206 } |
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207 |
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208 tree_matrix * |
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578
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209 tree_matrix::chain (tree_expression *t, tree_matrix::dir d) |
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494
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210 { |
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211 tree_matrix *tmp = new tree_matrix (t, d); |
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212 tmp->next = this; |
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213 return tmp; |
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214 } |
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215 |
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216 tree_matrix * |
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217 tree_matrix::reverse (void) |
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218 { |
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219 tree_matrix *list = this; |
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220 tree_matrix *next; |
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529
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221 tree_matrix *prev = 0; |
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222 |
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223 while (list) |
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494
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224 { |
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225 next = list->next; |
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226 list->next = prev; |
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227 prev = list; |
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228 list = next; |
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229 } |
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230 return prev; |
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231 } |
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232 |
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233 int |
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234 tree_matrix::length (void) |
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235 { |
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236 tree_matrix *list = this; |
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237 int len = 0; |
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529
|
238 while (list) |
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494
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239 { |
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240 len++; |
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241 list = list->next; |
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242 } |
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243 return len; |
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244 } |
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245 |
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246 tree_return_list * |
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247 tree_matrix::to_return_list (void) |
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248 { |
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529
|
249 tree_return_list *retval = 0; |
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578
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250 |
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494
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251 tree_matrix *list; |
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578
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252 |
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529
|
253 for (list = this; list; list = list->next) |
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494
|
254 { |
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255 tree_expression *elem = list->element; |
|
578
|
256 |
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257 int is_id = elem->is_identifier (); |
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258 |
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259 int is_idx_expr = elem->is_index_expression (); |
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260 |
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261 if (is_id || is_idx_expr) |
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494
|
262 { |
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578
|
263 tree_index_expression *idx_expr; |
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264 if (is_id) |
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265 { |
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|
266 tree_identifier *id = (tree_identifier *) elem; |
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267 idx_expr = new tree_index_expression (id); |
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268 } |
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494
|
269 else |
|
578
|
270 idx_expr = (tree_index_expression *) elem; |
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271 |
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494
|
272 if (list == this) |
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273 retval = new tree_return_list (idx_expr); |
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274 else |
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578
|
275 retval->append (idx_expr); |
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494
|
276 } |
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277 else |
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278 { |
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279 delete retval; |
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529
|
280 retval = 0; |
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494
|
281 break; |
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282 } |
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|
283 } |
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284 |
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285 return retval; |
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286 } |
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287 |
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|
288 // Just about as ugly as it gets. |
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289 |
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290 struct const_matrix_list |
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291 { |
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581
|
292 tree_matrix::dir direction; |
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494
|
293 tree_constant elem; |
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|
294 int nr; |
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|
295 int nc; |
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|
296 }; |
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297 |
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298 // Less ugly than before, anyway. |
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299 |
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300 tree_constant |
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301 tree_matrix::eval (int print) |
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|
302 { |
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303 tree_constant retval; |
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304 |
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305 if (error_state) |
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306 return retval; |
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|
307 |
|
|
308 // Just count the elements without looking at them. |
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|
309 |
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|
310 int total_len = length (); |
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|
311 |
|
|
312 // Easier to deal with this later instead of a tree_matrix structure. |
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|
313 |
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|
314 const_matrix_list *list = new const_matrix_list [total_len]; |
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|
315 |
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|
316 // Stats we want to keep track of. |
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317 |
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|
318 int all_strings = 1; |
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|
319 |
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|
320 int found_complex = 0; |
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|
321 |
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|
322 int row_total = 0; |
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|
323 int col_total = 0; |
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|
324 |
|
|
325 int row_height = 0; |
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|
326 |
|
|
327 int cols_this_row = 0; |
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|
328 |
|
|
329 int first_row = 1; |
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|
330 |
|
|
331 int empties_ok = user_pref.empty_list_elements_ok; |
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|
332 |
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|
333 tree_matrix *ptr = this; |
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|
334 |
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|
335 // Stuff for the result matrix or string. Declared here so that we |
|
|
336 // don't get warnings from gcc about the goto crossing the |
|
|
337 // initialization of these values. |
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338 |
|
|
339 int put_row = 0; |
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|
340 int put_col = 0; |
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|
341 |
|
|
342 int prev_nr = 0; |
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|
343 int prev_nc = 0; |
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|
344 |
|
|
345 Matrix m; |
|
|
346 ComplexMatrix cm; |
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|
347 |
|
529
|
348 char *string = 0; |
|
|
349 char *str_ptr = 0; |
|
494
|
350 |
|
|
351 // Eliminate empties and gather stats. |
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|
352 |
|
|
353 int found_new_row_in_empties = 0; |
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|
354 |
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|
355 int len = 0; |
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|
356 for (int i = 0; i < total_len; i++) |
|
|
357 { |
|
|
358 tree_expression *elem = ptr->element; |
|
529
|
359 if (! elem) |
|
494
|
360 { |
|
|
361 retval = tree_constant (Matrix ()); |
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|
362 goto done; |
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|
363 } |
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|
364 |
|
636
|
365 tree_constant tmp = elem->eval (0); |
|
494
|
366 if (error_state || tmp.is_undefined ()) |
|
|
367 { |
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|
368 retval = tree_constant (); |
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|
369 goto done; |
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|
370 } |
|
|
371 |
|
|
372 int nr = tmp.rows (); |
|
|
373 int nc = tmp.columns (); |
|
|
374 |
|
581
|
375 dir direct = ptr->direction; |
|
494
|
376 |
|
|
377 if (nr == 0 || nc == 0) |
|
|
378 { |
|
|
379 if (empties_ok < 0) |
|
|
380 warning ("empty matrix found in matrix list"); |
|
|
381 else if (empties_ok == 0) |
|
|
382 { |
|
|
383 ::error ("empty matrix found in matrix list"); |
|
|
384 retval = tree_constant (); |
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|
385 goto done; |
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|
386 } |
|
|
387 |
|
|
388 if (direct == md_down) |
|
|
389 found_new_row_in_empties = 1; |
|
|
390 |
|
|
391 goto next; |
|
|
392 } |
|
|
393 |
|
|
394 if (found_new_row_in_empties) |
|
|
395 { |
|
|
396 found_new_row_in_empties = 0; |
|
581
|
397 list[len].direction = md_down; |
|
494
|
398 } |
|
|
399 else |
|
581
|
400 list[len].direction = direct; |
|
494
|
401 |
|
|
402 list[len].elem = tmp; |
|
|
403 list[len].nr = nr; |
|
|
404 list[len].nc = nc; |
|
|
405 |
|
610
|
406 if (all_strings && ! tmp.is_string ()) |
|
494
|
407 all_strings = 0; |
|
|
408 |
|
|
409 if (! found_complex && tmp.is_complex_type ()) |
|
|
410 found_complex = 1; |
|
|
411 |
|
|
412 len++; |
|
|
413 |
|
|
414 next: |
|
|
415 |
|
|
416 ptr = ptr->next; |
|
|
417 } |
|
|
418 |
|
|
419 // if (all_strings) |
|
|
420 // cerr << "all strings\n"; |
|
|
421 |
|
|
422 // Compute size of result matrix, and check to see that the dimensions |
|
|
423 // of all the elements will match up properly. |
|
|
424 |
|
|
425 for (i = 0; i < len; i++) |
|
|
426 { |
|
581
|
427 dir direct = list[i].direction; |
|
578
|
428 |
|
494
|
429 int nr = list[i].nr; |
|
|
430 int nc = list[i].nc; |
|
|
431 |
|
|
432 if (i == 0) |
|
|
433 { |
|
|
434 row_total = nr; |
|
|
435 col_total = nc; |
|
|
436 |
|
|
437 row_height = nr; |
|
|
438 cols_this_row = nc; |
|
|
439 } |
|
|
440 else |
|
|
441 { |
|
|
442 switch (direct) |
|
|
443 { |
|
|
444 case md_right: |
|
|
445 { |
|
|
446 if (nr != row_height) |
|
|
447 { |
|
|
448 ::error ("number of rows must match"); |
|
|
449 goto done; |
|
|
450 } |
|
|
451 else |
|
|
452 { |
|
|
453 cols_this_row += nc; |
|
|
454 if (first_row) |
|
|
455 col_total = cols_this_row; |
|
|
456 } |
|
|
457 } |
|
|
458 break; |
|
777
|
459 |
|
494
|
460 case md_down: |
|
|
461 { |
|
|
462 if (cols_this_row != col_total) |
|
|
463 { |
|
|
464 ::error ("number of columns must match"); |
|
|
465 goto done; |
|
|
466 } |
|
|
467 first_row = 0; |
|
|
468 row_total += nr; |
|
|
469 row_height = nr; |
|
|
470 cols_this_row = nc; |
|
|
471 } |
|
|
472 break; |
|
777
|
473 |
|
494
|
474 default: |
|
|
475 panic_impossible (); |
|
|
476 break; |
|
|
477 } |
|
|
478 } |
|
|
479 } |
|
|
480 |
|
|
481 // Don\'t forget to check to see if the last element will fit. |
|
|
482 |
|
|
483 if (cols_this_row != col_total) |
|
|
484 { |
|
|
485 ::error ("number of columns must match"); |
|
|
486 goto done; |
|
|
487 } |
|
|
488 |
|
|
489 // Now, extract the values from the individual elements and insert |
|
|
490 // them in the result matrix. |
|
|
491 |
|
|
492 if (all_strings && row_total == 1 && col_total > 0) |
|
|
493 { |
|
|
494 string = str_ptr = new char [col_total + 1]; |
|
|
495 string[col_total] = '\0'; |
|
|
496 } |
|
|
497 else if (found_complex) |
|
|
498 cm.resize (row_total, col_total, 0.0); |
|
|
499 else |
|
|
500 m.resize (row_total, col_total, 0.0); |
|
|
501 |
|
|
502 for (i = 0; i < len; i++) |
|
|
503 { |
|
|
504 tree_constant tmp = list[i].elem; |
|
|
505 |
|
|
506 int nr = list[i].nr; |
|
|
507 int nc = list[i].nc; |
|
|
508 |
|
|
509 if (nr == 0 || nc == 0) |
|
|
510 continue; |
|
|
511 |
|
|
512 if (i == 0) |
|
|
513 { |
|
|
514 put_row = 0; |
|
|
515 put_col = 0; |
|
|
516 } |
|
|
517 else |
|
|
518 { |
|
581
|
519 switch (list[i].direction) |
|
494
|
520 { |
|
|
521 case md_right: |
|
|
522 put_col += prev_nc; |
|
|
523 break; |
|
777
|
524 |
|
494
|
525 case md_down: |
|
|
526 put_row += prev_nr; |
|
|
527 put_col = 0; |
|
|
528 break; |
|
777
|
529 |
|
494
|
530 default: |
|
|
531 panic_impossible (); |
|
|
532 break; |
|
|
533 } |
|
|
534 } |
|
|
535 |
|
|
536 if (found_complex) |
|
|
537 { |
|
620
|
538 if (tmp.is_real_scalar ()) |
|
494
|
539 { |
|
|
540 cm (put_row, put_col) = tmp.double_value (); |
|
620
|
541 } |
|
636
|
542 else if (tmp.is_real_matrix () || tmp.is_range ()) |
|
620
|
543 { |
|
494
|
544 cm.insert (tmp.matrix_value (), put_row, put_col); |
|
620
|
545 } |
|
|
546 else if (tmp.is_complex_scalar ()) |
|
|
547 { |
|
494
|
548 cm (put_row, put_col) = tmp.complex_value (); |
|
620
|
549 } |
|
|
550 else |
|
|
551 { |
|
663
|
552 ComplexMatrix cm_tmp = tmp.complex_matrix_value (); |
|
|
553 |
|
|
554 if (error_state) |
|
|
555 goto done; |
|
|
556 |
|
|
557 cm.insert (cm_tmp, put_row, put_col); |
|
494
|
558 } |
|
|
559 } |
|
|
560 else |
|
|
561 { |
|
620
|
562 if (tmp.is_real_scalar ()) |
|
494
|
563 { |
|
|
564 m (put_row, put_col) = tmp.double_value (); |
|
620
|
565 } |
|
663
|
566 else if (tmp.is_string () && all_strings && str_ptr) |
|
620
|
567 { |
|
663
|
568 memcpy (str_ptr, tmp.string_value (), nc); |
|
|
569 str_ptr += nc; |
|
620
|
570 } |
|
|
571 else |
|
|
572 { |
|
663
|
573 Matrix m_tmp = tmp.matrix_value (); |
|
|
574 |
|
|
575 if (error_state) |
|
|
576 goto done; |
|
|
577 |
|
|
578 m.insert (m_tmp, put_row, put_col); |
|
494
|
579 } |
|
|
580 } |
|
|
581 |
|
|
582 prev_nr = nr; |
|
|
583 prev_nc = nc; |
|
|
584 } |
|
|
585 |
|
529
|
586 if (all_strings && string) |
|
494
|
587 retval = tree_constant (string); |
|
|
588 else if (found_complex) |
|
|
589 retval = tree_constant (cm); |
|
|
590 else |
|
|
591 retval = tree_constant (m); |
|
|
592 |
|
|
593 done: |
|
|
594 delete [] list; |
|
|
595 |
|
|
596 return retval; |
|
|
597 } |
|
|
598 |
|
581
|
599 void |
|
|
600 tree_matrix::print_code (ostream& os) |
|
|
601 { |
|
|
602 print_code_indent (os); |
|
|
603 |
|
|
604 if (in_parens) |
|
|
605 os << "("; |
|
|
606 |
|
|
607 os << "["; |
|
|
608 |
|
|
609 tree_matrix *list = this; |
|
|
610 |
|
|
611 while (list) |
|
|
612 { |
|
|
613 list->element->print_code (os); |
|
|
614 |
|
|
615 list = list->next; |
|
|
616 |
|
|
617 if (list) |
|
|
618 { |
|
|
619 switch (list->direction) |
|
|
620 { |
|
|
621 case md_right: |
|
|
622 os << ", "; |
|
|
623 break; |
|
777
|
624 |
|
581
|
625 case md_down: |
|
|
626 os << "; "; |
|
|
627 break; |
|
777
|
628 |
|
581
|
629 default: |
|
|
630 break; |
|
|
631 } |
|
|
632 } |
|
|
633 } |
|
|
634 |
|
|
635 os << "]"; |
|
|
636 |
|
|
637 if (in_parens) |
|
|
638 os << ")"; |
|
|
639 } |
|
|
640 |
|
666
|
641 // A base class for objects that can be return multiple values |
|
|
642 |
|
|
643 tree_constant |
|
|
644 tree_multi_val_ret::eval (int print) |
|
|
645 { |
|
|
646 panic ("invalid evaluation of generic expression"); |
|
|
647 return tree_constant (); |
|
|
648 } |
|
|
649 |
|
581
|
650 // A base class for objects that can be evaluated with argument lists. |
|
|
651 |
|
494
|
652 tree_constant |
|
782
|
653 tree_fvc::assign (tree_constant& t, const Octave_object& args) |
|
494
|
654 { |
|
|
655 panic_impossible (); |
|
|
656 return tree_constant (); |
|
|
657 } |
|
|
658 |
|
749
|
659 tree_constant |
|
|
660 tree_fvc::lookup_map_element (SLList<char*>& list) |
|
|
661 { |
|
|
662 static tree_constant retval; |
|
|
663 return retval; |
|
|
664 } |
|
|
665 |
|
578
|
666 // Symbols from the symbol table. |
|
494
|
667 |
|
|
668 char * |
|
|
669 tree_identifier::name (void) const |
|
|
670 { |
|
581
|
671 return sym ? sym->name () : 0; |
|
494
|
672 } |
|
|
673 |
|
|
674 tree_identifier * |
|
|
675 tree_identifier::define (tree_constant *t) |
|
|
676 { |
|
|
677 int status = sym->define (t); |
|
581
|
678 return status ? this : 0; |
|
494
|
679 } |
|
|
680 |
|
|
681 tree_identifier * |
|
|
682 tree_identifier::define (tree_function *t) |
|
|
683 { |
|
|
684 int status = sym->define (t); |
|
581
|
685 return status ? this : 0; |
|
494
|
686 } |
|
|
687 |
|
|
688 void |
|
|
689 tree_identifier::document (char *s) |
|
|
690 { |
|
529
|
691 if (sym && s) |
|
749
|
692 sym->document (strsave (s)); |
|
494
|
693 } |
|
|
694 |
|
|
695 tree_constant |
|
782
|
696 tree_identifier::assign (tree_constant& rhs) |
|
494
|
697 { |
|
749
|
698 tree_constant retval; |
|
494
|
699 |
|
|
700 if (rhs.is_defined ()) |
|
|
701 { |
|
|
702 if (! sym->is_defined ()) |
|
|
703 { |
|
|
704 if (! (sym->is_formal_parameter () |
|
|
705 || sym->is_linked_to_global ())) |
|
|
706 { |
|
|
707 link_to_builtin_variable (sym); |
|
|
708 } |
|
|
709 } |
|
|
710 else if (sym->is_function ()) |
|
|
711 { |
|
|
712 sym->clear (); |
|
|
713 } |
|
|
714 |
|
|
715 tree_constant *tmp = new tree_constant (rhs); |
|
749
|
716 |
|
|
717 if (sym->define (tmp)) |
|
|
718 retval = rhs; |
|
|
719 else |
|
|
720 delete tmp; |
|
494
|
721 } |
|
|
722 |
|
749
|
723 return retval; |
|
494
|
724 } |
|
|
725 |
|
|
726 tree_constant |
|
782
|
727 tree_identifier::assign (tree_constant& rhs, const Octave_object& args) |
|
494
|
728 { |
|
|
729 tree_constant retval; |
|
|
730 |
|
|
731 if (rhs.is_defined ()) |
|
|
732 { |
|
|
733 if (! sym->is_defined ()) |
|
|
734 { |
|
|
735 if (! (sym->is_formal_parameter () |
|
|
736 || sym->is_linked_to_global ())) |
|
|
737 { |
|
|
738 link_to_builtin_variable (sym); |
|
|
739 } |
|
|
740 } |
|
|
741 else if (sym->is_function ()) |
|
|
742 { |
|
|
743 sym->clear (); |
|
|
744 } |
|
|
745 |
|
|
746 if (sym->is_variable () && sym->is_defined ()) |
|
|
747 { |
|
|
748 tree_fvc *tmp = sym->def (); |
|
506
|
749 retval = tmp->assign (rhs, args); |
|
494
|
750 } |
|
|
751 else |
|
|
752 { |
|
|
753 assert (! sym->is_defined ()); |
|
|
754 |
|
|
755 if (! user_pref.resize_on_range_error) |
|
|
756 { |
|
|
757 ::error ("indexed assignment to previously undefined variables"); |
|
|
758 ::error ("is only possible when resize_on_range_error is true"); |
|
749
|
759 } |
|
|
760 else |
|
|
761 { |
|
|
762 tree_constant *tmp = new tree_constant (); |
|
|
763 retval = tmp->assign (rhs, args); |
|
|
764 if (retval.is_defined ()) |
|
|
765 sym->define (tmp); |
|
|
766 } |
|
|
767 } |
|
|
768 } |
|
|
769 |
|
|
770 return retval; |
|
|
771 } |
|
|
772 |
|
|
773 tree_constant |
|
782
|
774 tree_identifier::assign (SLList<char*> list, tree_constant& rhs) |
|
749
|
775 { |
|
|
776 tree_constant retval; |
|
|
777 |
|
|
778 if (rhs.is_defined ()) |
|
|
779 { |
|
|
780 if (sym->is_function ()) |
|
|
781 sym->clear (); |
|
|
782 |
|
|
783 tree_fvc *curr_val = sym->def (); |
|
|
784 |
|
|
785 tree_constant *tmp = 0; |
|
|
786 if (curr_val && curr_val->is_constant ()) |
|
|
787 tmp = (tree_constant *) curr_val; |
|
|
788 else |
|
|
789 { |
|
|
790 tmp = new tree_constant (); |
|
|
791 if (! sym->define (tmp)) |
|
|
792 { |
|
|
793 delete tmp; |
|
|
794 tmp = 0; |
|
494
|
795 } |
|
749
|
796 } |
|
|
797 |
|
|
798 if (tmp) |
|
|
799 retval = tmp->assign_map_element (list, rhs); |
|
|
800 } |
|
|
801 |
|
|
802 return retval; |
|
|
803 } |
|
|
804 |
|
|
805 tree_constant |
|
782
|
806 tree_identifier::assign (SLList<char*> list, tree_constant& rhs, |
|
749
|
807 const Octave_object& args) |
|
|
808 { |
|
|
809 tree_constant retval; |
|
|
810 |
|
|
811 if (rhs.is_defined ()) |
|
|
812 { |
|
|
813 if (sym->is_function ()) |
|
|
814 sym->clear (); |
|
|
815 |
|
|
816 if (sym->is_variable () && sym->is_defined ()) |
|
|
817 { |
|
|
818 tree_fvc *curr_val = sym->def (); |
|
|
819 |
|
|
820 tree_constant *tmp; |
|
|
821 if (curr_val && curr_val->is_constant ()) |
|
|
822 tmp = (tree_constant *) curr_val; |
|
|
823 else |
|
|
824 panic_impossible (); |
|
|
825 |
|
|
826 retval = tmp->assign_map_element (list, rhs, args); |
|
|
827 } |
|
|
828 else |
|
|
829 { |
|
|
830 assert (! sym->is_defined ()); |
|
|
831 |
|
|
832 if (! user_pref.resize_on_range_error) |
|
|
833 { |
|
|
834 ::error ("indexed assignment to previously undefined variables"); |
|
|
835 ::error ("is only possible when resize_on_range_error is true"); |
|
|
836 } |
|
|
837 else |
|
|
838 { |
|
|
839 tree_constant *tmp = new tree_constant (); |
|
|
840 |
|
|
841 retval = tmp->assign_map_element (list, rhs, args); |
|
|
842 |
|
|
843 if (retval.is_defined ()) |
|
|
844 sym->define (tmp); |
|
|
845 } |
|
494
|
846 } |
|
|
847 } |
|
|
848 |
|
|
849 return retval; |
|
|
850 } |
|
|
851 |
|
500
|
852 int |
|
|
853 tree_identifier::is_defined (void) |
|
|
854 { |
|
529
|
855 return (sym && sym->is_defined ()); |
|
500
|
856 } |
|
|
857 |
|
494
|
858 void |
|
578
|
859 tree_identifier::bump_value (tree_expression::type etype) |
|
494
|
860 { |
|
529
|
861 if (sym) |
|
494
|
862 { |
|
922
|
863 if (sym->is_read_only ()) |
|
|
864 { |
|
|
865 ::error ("can't redefined read-only variable `%s'", name ()); |
|
|
866 } |
|
|
867 else |
|
|
868 { |
|
|
869 tree_fvc *tmp = sym->def (); |
|
|
870 if (tmp) |
|
|
871 tmp->bump_value (etype); |
|
|
872 } |
|
494
|
873 } |
|
|
874 } |
|
|
875 |
|
|
876 void |
|
|
877 tree_identifier::eval_undefined_error (void) |
|
|
878 { |
|
749
|
879 char *nm = name (); |
|
494
|
880 int l = line (); |
|
|
881 int c = column (); |
|
|
882 if (l == -1 && c == -1) |
|
581
|
883 ::error ("`%s' undefined", nm); |
|
494
|
884 else |
|
|
885 ::error ("`%s' undefined near line %d column %d", nm, l, c); |
|
|
886 } |
|
|
887 |
|
578
|
888 // Try to find a definition for an identifier. Here's how: |
|
|
889 // |
|
|
890 // * If the identifier is already defined and is a function defined |
|
|
891 // in an function file that has been modified since the last time |
|
|
892 // we parsed it, parse it again. |
|
|
893 // |
|
|
894 // * If the identifier is not defined, try to find a builtin |
|
|
895 // variable or an already compiled function with the same name. |
|
|
896 // |
|
|
897 // * If the identifier is still undefined, try looking for an |
|
|
898 // function file to parse. |
|
|
899 // |
|
|
900 // * On systems that support dynamic linking, we prefer .oct files |
|
|
901 // over .m files. |
|
|
902 |
|
494
|
903 tree_fvc * |
|
749
|
904 tree_identifier::do_lookup (int& script_file_executed, int exec_script) |
|
494
|
905 { |
|
749
|
906 script_file_executed = lookup (sym, exec_script); |
|
494
|
907 |
|
712
|
908 tree_fvc *retval = 0; |
|
494
|
909 |
|
|
910 if (! script_file_executed) |
|
712
|
911 retval = sym->def (); |
|
|
912 |
|
|
913 return retval; |
|
494
|
914 } |
|
|
915 |
|
|
916 void |
|
749
|
917 tree_identifier::link_to_global (void) |
|
|
918 { |
|
|
919 if (sym) |
|
|
920 link_to_global_variable (sym); |
|
|
921 } |
|
|
922 |
|
|
923 void |
|
494
|
924 tree_identifier::mark_as_formal_parameter (void) |
|
|
925 { |
|
529
|
926 if (sym) |
|
494
|
927 sym->mark_as_formal_parameter (); |
|
|
928 } |
|
|
929 |
|
|
930 tree_constant |
|
|
931 tree_identifier::eval (int print) |
|
|
932 { |
|
|
933 tree_constant retval; |
|
|
934 |
|
|
935 if (error_state) |
|
|
936 return retval; |
|
|
937 |
|
|
938 int script_file_executed = 0; |
|
|
939 |
|
712
|
940 tree_fvc *object_to_eval = do_lookup (script_file_executed); |
|
494
|
941 |
|
|
942 if (! script_file_executed) |
|
|
943 { |
|
712
|
944 if (object_to_eval) |
|
494
|
945 { |
|
|
946 int nargout = maybe_do_ans_assign ? 0 : 1; |
|
|
947 |
|
1003
|
948 if (nargout) |
|
|
949 { |
|
|
950 Octave_object tmp_args; |
|
|
951 Octave_object tmp = object_to_eval->eval (0, nargout, tmp_args); |
|
|
952 |
|
|
953 if (tmp.length () > 0) |
|
|
954 retval = tmp(0); |
|
|
955 } |
|
|
956 else |
|
|
957 retval = object_to_eval->eval (0); |
|
494
|
958 } |
|
529
|
959 else |
|
|
960 eval_undefined_error (); |
|
494
|
961 } |
|
|
962 |
|
|
963 if (! error_state && retval.is_defined ()) |
|
|
964 { |
|
712
|
965 if (maybe_do_ans_assign && ! object_to_eval->is_constant ()) |
|
494
|
966 { |
|
581
|
967 |
|
|
968 // XXX FIXME XXX -- need a procedure to do this, probably in |
|
|
969 // variables.cc, to isolate the code that does lookups... |
|
|
970 |
|
494
|
971 symbol_record *sr = global_sym_tab->lookup ("ans", 1, 0); |
|
|
972 |
|
529
|
973 assert (sr); |
|
|
974 |
|
494
|
975 tree_identifier *ans_id = new tree_identifier (sr); |
|
|
976 |
|
|
977 tree_constant *tmp = new tree_constant (retval); |
|
|
978 |
|
581
|
979 tree_simple_assignment_expression tmp_ass (ans_id, tmp, 0, 1); |
|
494
|
980 |
|
|
981 tmp_ass.eval (print); |
|
|
982 } |
|
|
983 else |
|
|
984 { |
|
|
985 if (print) |
|
749
|
986 print_constant (retval, name ()); |
|
494
|
987 } |
|
|
988 } |
|
|
989 return retval; |
|
|
990 } |
|
|
991 |
|
500
|
992 Octave_object |
|
506
|
993 tree_identifier::eval (int print, int nargout, const Octave_object& args) |
|
494
|
994 { |
|
500
|
995 Octave_object retval; |
|
494
|
996 |
|
|
997 if (error_state) |
|
|
998 return retval; |
|
|
999 |
|
|
1000 int script_file_executed = 0; |
|
|
1001 |
|
712
|
1002 tree_fvc *object_to_eval = do_lookup (script_file_executed); |
|
494
|
1003 |
|
|
1004 if (! script_file_executed) |
|
|
1005 { |
|
712
|
1006 if (object_to_eval) |
|
494
|
1007 { |
|
|
1008 if (maybe_do_ans_assign && nargout == 1) |
|
|
1009 { |
|
|
1010 |
|
|
1011 // Don't count the output arguments that we create automatically. |
|
|
1012 |
|
|
1013 nargout = 0; |
|
|
1014 |
|
712
|
1015 retval = object_to_eval->eval (0, nargout, args); |
|
494
|
1016 |
|
500
|
1017 if (retval.length () > 0 && retval(0).is_defined ()) |
|
494
|
1018 { |
|
581
|
1019 |
|
|
1020 // XXX FIXME XXX -- need a procedure to do this, probably in |
|
|
1021 // variables.cc, to isolate the code that does lookups... |
|
|
1022 |
|
494
|
1023 symbol_record *sr = global_sym_tab->lookup ("ans", 1, 0); |
|
|
1024 |
|
529
|
1025 assert (sr); |
|
494
|
1026 |
|
|
1027 tree_identifier *ans_id = new tree_identifier (sr); |
|
|
1028 |
|
500
|
1029 tree_constant *tmp = new tree_constant (retval(0)); |
|
494
|
1030 |
|
581
|
1031 tree_simple_assignment_expression tmp_ass (ans_id, |
|
|
1032 tmp, 0, 1); |
|
494
|
1033 |
|
|
1034 tmp_ass.eval (print); |
|
|
1035 } |
|
|
1036 } |
|
|
1037 else |
|
712
|
1038 retval = object_to_eval->eval (print, nargout, args); |
|
494
|
1039 } |
|
529
|
1040 else |
|
|
1041 eval_undefined_error (); |
|
494
|
1042 } |
|
|
1043 |
|
|
1044 return retval; |
|
|
1045 } |
|
|
1046 |
|
581
|
1047 void |
|
|
1048 tree_identifier::print_code (ostream& os) |
|
|
1049 { |
|
|
1050 print_code_indent (os); |
|
|
1051 |
|
|
1052 if (in_parens) |
|
|
1053 os << "("; |
|
|
1054 |
|
|
1055 char *nm = name (); |
|
|
1056 os << (nm) ? nm : "(null)"; |
|
|
1057 |
|
|
1058 if (in_parens) |
|
|
1059 os << ")"; |
|
|
1060 } |
|
|
1061 |
|
749
|
1062 // Indirect references to values (structure elements). |
|
|
1063 |
|
|
1064 tree_indirect_ref::~tree_indirect_ref (void) |
|
|
1065 { |
|
|
1066 while (! refs.empty ()) |
|
|
1067 { |
|
|
1068 char *t = refs.remove_front (); |
|
|
1069 delete [] t; |
|
|
1070 } |
|
|
1071 |
|
750
|
1072 if (! preserve_ident) |
|
|
1073 delete id; |
|
749
|
1074 } |
|
|
1075 |
|
|
1076 tree_indirect_ref * |
|
|
1077 tree_indirect_ref::chain (const char *elt) |
|
|
1078 { |
|
|
1079 refs.append (strsave (elt)); |
|
|
1080 return this; |
|
|
1081 } |
|
|
1082 |
|
|
1083 char * |
|
|
1084 tree_indirect_ref::name (void) |
|
|
1085 { |
|
|
1086 char *id_nm = id->name (); |
|
|
1087 if (refs.empty ()) |
|
|
1088 return id_nm; |
|
|
1089 else |
|
|
1090 { |
|
|
1091 static char *nm = 0; |
|
|
1092 delete [] nm; |
|
|
1093 |
|
|
1094 ostrstream tmp; |
|
|
1095 |
|
|
1096 tmp << id_nm; |
|
|
1097 |
|
|
1098 for (Pix p = refs.first (); p != 0; refs.next (p)) |
|
|
1099 { |
|
|
1100 char *elt = refs (p); |
|
|
1101 |
|
|
1102 if (elt) |
|
|
1103 tmp << "." << elt; |
|
|
1104 } |
|
|
1105 |
|
|
1106 tmp << ends; |
|
|
1107 nm = tmp.str (); |
|
|
1108 return nm; |
|
|
1109 } |
|
|
1110 } |
|
|
1111 |
|
|
1112 tree_constant |
|
782
|
1113 tree_indirect_ref::assign (tree_constant& t) |
|
749
|
1114 { |
|
|
1115 tree_constant retval; |
|
|
1116 |
|
|
1117 if (refs.empty ()) |
|
|
1118 retval = id->assign (t); |
|
|
1119 else |
|
|
1120 retval = id->assign (refs, t); |
|
|
1121 |
|
|
1122 return retval; |
|
|
1123 } |
|
|
1124 |
|
|
1125 tree_constant |
|
782
|
1126 tree_indirect_ref::assign (tree_constant& t, const Octave_object& args) |
|
749
|
1127 { |
|
|
1128 tree_constant retval; |
|
|
1129 |
|
|
1130 if (refs.empty ()) |
|
|
1131 retval = id->assign (t, args); |
|
|
1132 else |
|
|
1133 retval = id->assign (refs, t, args); |
|
|
1134 |
|
|
1135 return retval; |
|
|
1136 } |
|
|
1137 |
|
|
1138 tree_constant |
|
|
1139 tree_indirect_ref::eval (int print) |
|
|
1140 { |
|
|
1141 tree_constant retval; |
|
|
1142 |
|
|
1143 if (error_state) |
|
|
1144 return retval; |
|
|
1145 |
|
|
1146 if (refs.empty ()) |
|
|
1147 { |
|
|
1148 retval = id->eval (print); |
|
|
1149 } |
|
|
1150 else |
|
|
1151 { |
|
|
1152 int script_file_executed; |
|
|
1153 |
|
|
1154 tree_fvc *object_to_eval = id->do_lookup (script_file_executed, 0); |
|
|
1155 |
|
|
1156 if (object_to_eval) |
|
|
1157 { |
|
|
1158 retval = object_to_eval->lookup_map_element (refs); |
|
|
1159 |
|
|
1160 if (! error_state && print) |
|
|
1161 print_constant (retval, name ()); |
|
|
1162 } |
|
|
1163 else |
|
|
1164 id->eval_undefined_error (); |
|
|
1165 } |
|
|
1166 |
|
|
1167 return retval; |
|
|
1168 } |
|
|
1169 |
|
|
1170 Octave_object |
|
|
1171 tree_indirect_ref::eval (int print, int nargout, const Octave_object& args) |
|
|
1172 { |
|
|
1173 Octave_object retval; |
|
|
1174 |
|
|
1175 if (error_state) |
|
|
1176 return retval; |
|
|
1177 |
|
|
1178 if (refs.empty ()) |
|
|
1179 { |
|
|
1180 retval = id->eval (print, nargout, args); |
|
|
1181 } |
|
|
1182 else |
|
|
1183 { |
|
|
1184 int script_file_executed; |
|
|
1185 |
|
|
1186 tree_fvc *object_to_eval = id->do_lookup (script_file_executed, 0); |
|
|
1187 |
|
|
1188 if (object_to_eval) |
|
|
1189 { |
|
|
1190 tree_constant tmp = object_to_eval->lookup_map_element (refs); |
|
|
1191 |
|
|
1192 if (! error_state) |
|
|
1193 { |
|
|
1194 retval = tmp.eval (0, nargout, args); |
|
|
1195 |
|
|
1196 if (! error_state && print) |
|
|
1197 { |
|
|
1198 tmp = retval (0); |
|
|
1199 if (tmp.is_defined ()) |
|
|
1200 print_constant (tmp, name ()); |
|
|
1201 } |
|
|
1202 } |
|
|
1203 } |
|
|
1204 else |
|
|
1205 id->eval_undefined_error (); |
|
|
1206 } |
|
|
1207 |
|
|
1208 return retval; |
|
|
1209 } |
|
|
1210 |
|
|
1211 void |
|
|
1212 tree_indirect_ref::print_code (ostream& os) |
|
|
1213 { |
|
|
1214 print_code_indent (os); |
|
|
1215 |
|
|
1216 if (in_parens) |
|
|
1217 os << "("; |
|
|
1218 |
|
|
1219 char *nm = id ? id->name () : "(null)"; |
|
|
1220 os << (nm) ? nm : "(null)"; |
|
|
1221 |
|
|
1222 for (Pix p = refs.first (); p != 0; refs.next (p)) |
|
|
1223 { |
|
|
1224 char *elt = refs (p); |
|
|
1225 |
|
|
1226 if (elt) |
|
|
1227 os << "." << elt; |
|
|
1228 } |
|
|
1229 |
|
|
1230 if (in_parens) |
|
|
1231 os << ")"; |
|
|
1232 } |
|
|
1233 |
|
581
|
1234 // Index expressions. |
|
|
1235 |
|
|
1236 tree_index_expression::~tree_index_expression (void) |
|
|
1237 { |
|
|
1238 delete id; |
|
|
1239 delete list; |
|
|
1240 } |
|
|
1241 |
|
|
1242 tree_constant |
|
|
1243 tree_index_expression::eval (int print) |
|
|
1244 { |
|
|
1245 tree_constant retval; |
|
|
1246 |
|
|
1247 if (error_state) |
|
|
1248 return retval; |
|
|
1249 |
|
|
1250 if (list) |
|
|
1251 { |
|
712
|
1252 // Extract the arguments into a simple vector. Don't pass null args. |
|
|
1253 |
|
581
|
1254 Octave_object args = list->convert_to_const_vector (); |
|
712
|
1255 |
|
581
|
1256 if (error_state) |
|
|
1257 eval_error (); |
|
922
|
1258 else |
|
581
|
1259 { |
|
922
|
1260 int nargin = args.length (); |
|
581
|
1261 |
|
|
1262 if (error_state) |
|
|
1263 eval_error (); |
|
1089
|
1264 else if (nargin > 0) |
|
922
|
1265 { |
|
1089
|
1266 if (all_args_defined (args)) |
|
|
1267 { |
|
|
1268 Octave_object tmp = id->eval (print, 1, args); |
|
|
1269 |
|
|
1270 if (error_state) |
|
|
1271 eval_error (); |
|
|
1272 else if (tmp.length () > 0) |
|
|
1273 retval = tmp(0); |
|
|
1274 } |
|
|
1275 else |
|
|
1276 { |
|
|
1277 ::error ("undefined arguments found in index expression"); |
|
|
1278 eval_error (); |
|
|
1279 } |
|
922
|
1280 } |
|
1089
|
1281 else |
|
|
1282 panic_impossible (); // XXX FIXME XXX -- is this correct? |
|
581
|
1283 } |
|
|
1284 } |
|
|
1285 else |
|
|
1286 { |
|
|
1287 retval = id->eval (print); |
|
749
|
1288 |
|
581
|
1289 if (error_state) |
|
|
1290 eval_error (); |
|
|
1291 } |
|
|
1292 |
|
|
1293 return retval; |
|
|
1294 } |
|
|
1295 |
|
|
1296 Octave_object |
|
|
1297 tree_index_expression::eval (int print, int nargout, const Octave_object& args) |
|
|
1298 { |
|
|
1299 Octave_object retval; |
|
|
1300 |
|
|
1301 if (error_state) |
|
|
1302 return retval; |
|
|
1303 |
|
|
1304 if (list) |
|
|
1305 { |
|
712
|
1306 // Extract the arguments into a simple vector. Don't pass null args. |
|
|
1307 |
|
581
|
1308 Octave_object args = list->convert_to_const_vector (); |
|
712
|
1309 |
|
581
|
1310 if (error_state) |
|
|
1311 eval_error (); |
|
922
|
1312 else |
|
581
|
1313 { |
|
922
|
1314 int nargin = args.length (); |
|
749
|
1315 |
|
581
|
1316 if (error_state) |
|
|
1317 eval_error (); |
|
1089
|
1318 else if (nargin > 0) |
|
922
|
1319 { |
|
1089
|
1320 if (all_args_defined (args)) |
|
|
1321 { |
|
|
1322 retval = id->eval (print, nargout, args); |
|
|
1323 |
|
|
1324 if (error_state) |
|
|
1325 eval_error (); |
|
|
1326 } |
|
|
1327 else |
|
|
1328 { |
|
|
1329 ::error ("undefined arguments found in index expression"); |
|
|
1330 eval_error (); |
|
|
1331 } |
|
922
|
1332 } |
|
1089
|
1333 else |
|
|
1334 panic_impossible (); // XXX FIXME XXX -- is this correct? |
|
581
|
1335 } |
|
|
1336 } |
|
|
1337 else |
|
|
1338 { |
|
|
1339 Octave_object tmp_args; |
|
749
|
1340 |
|
581
|
1341 retval = id->eval (print, nargout, tmp_args); |
|
749
|
1342 |
|
581
|
1343 if (error_state) |
|
|
1344 eval_error (); |
|
|
1345 } |
|
|
1346 |
|
|
1347 return retval; |
|
|
1348 } |
|
|
1349 |
|
|
1350 void |
|
|
1351 tree_index_expression::eval_error (void) |
|
|
1352 { |
|
|
1353 if (error_state > 0) |
|
|
1354 { |
|
|
1355 int l = line (); |
|
|
1356 int c = column (); |
|
|
1357 char *fmt; |
|
|
1358 if (l != -1 && c != -1) |
|
|
1359 { |
|
|
1360 if (list) |
|
|
1361 fmt = "evaluating index expression near line %d, column %d"; |
|
|
1362 else |
|
|
1363 fmt = "evaluating expression near line %d, column %d"; |
|
|
1364 |
|
|
1365 ::error (fmt, l, c); |
|
|
1366 } |
|
|
1367 else |
|
|
1368 { |
|
|
1369 if (list) |
|
|
1370 ::error ("evaluating index expression"); |
|
|
1371 else |
|
|
1372 ::error ("evaluating expression"); |
|
|
1373 } |
|
|
1374 } |
|
|
1375 } |
|
|
1376 |
|
|
1377 void |
|
|
1378 tree_index_expression::print_code (ostream& os) |
|
|
1379 { |
|
|
1380 print_code_indent (os); |
|
|
1381 |
|
|
1382 if (in_parens) |
|
|
1383 os << "("; |
|
|
1384 |
|
|
1385 if (id) |
|
|
1386 id->print_code (os); |
|
|
1387 |
|
|
1388 if (list) |
|
|
1389 { |
|
|
1390 os << " ("; |
|
|
1391 list->print_code (os); |
|
|
1392 os << ")"; |
|
|
1393 } |
|
|
1394 |
|
|
1395 if (in_parens) |
|
|
1396 os << ")"; |
|
|
1397 } |
|
|
1398 |
|
|
1399 // Prefix expressions. |
|
|
1400 |
|
|
1401 tree_constant |
|
|
1402 tree_prefix_expression::eval (int print) |
|
|
1403 { |
|
|
1404 tree_constant retval; |
|
|
1405 |
|
|
1406 if (error_state) |
|
|
1407 return retval; |
|
|
1408 |
|
|
1409 if (id) |
|
|
1410 { |
|
|
1411 id->bump_value (etype); |
|
|
1412 if (error_state) |
|
922
|
1413 eval_error (); |
|
|
1414 else |
|
581
|
1415 { |
|
922
|
1416 retval = id->eval (print); |
|
581
|
1417 if (error_state) |
|
922
|
1418 { |
|
|
1419 retval = tree_constant (); |
|
|
1420 if (error_state) |
|
|
1421 eval_error (); |
|
|
1422 } |
|
581
|
1423 } |
|
|
1424 } |
|
|
1425 return retval; |
|
|
1426 } |
|
|
1427 |
|
|
1428 char * |
|
|
1429 tree_prefix_expression::oper (void) const |
|
|
1430 { |
|
|
1431 static char *op; |
|
|
1432 switch (etype) |
|
|
1433 { |
|
777
|
1434 case tree_expression::increment: |
|
|
1435 op = "++"; |
|
|
1436 break; |
|
|
1437 |
|
|
1438 case tree_expression::decrement: |
|
|
1439 op = "--"; |
|
|
1440 break; |
|
|
1441 |
|
|
1442 default: |
|
|
1443 op = "<unknown>"; |
|
|
1444 break; |
|
581
|
1445 } |
|
|
1446 return op; |
|
|
1447 } |
|
|
1448 |
|
|
1449 void |
|
|
1450 tree_prefix_expression::eval_error (void) |
|
|
1451 { |
|
|
1452 if (error_state > 0) |
|
|
1453 { |
|
|
1454 char *op = oper (); |
|
|
1455 |
|
|
1456 ::error ("evaluating prefix operator `%s' near line %d, column %d", |
|
|
1457 op, line (), column ()); |
|
|
1458 } |
|
|
1459 } |
|
|
1460 |
|
|
1461 void |
|
|
1462 tree_prefix_expression::print_code (ostream& os) |
|
|
1463 { |
|
|
1464 print_code_indent (os); |
|
|
1465 |
|
|
1466 if (in_parens) |
|
|
1467 os << "("; |
|
|
1468 |
|
|
1469 os << oper (); |
|
|
1470 |
|
|
1471 if (id) |
|
|
1472 id->print_code (os); |
|
|
1473 |
|
|
1474 if (in_parens) |
|
|
1475 os << ")"; |
|
|
1476 } |
|
|
1477 |
|
|
1478 // Postfix expressions. |
|
|
1479 |
|
|
1480 tree_constant |
|
|
1481 tree_postfix_expression::eval (int print) |
|
|
1482 { |
|
|
1483 tree_constant retval; |
|
|
1484 |
|
|
1485 if (error_state) |
|
|
1486 return retval; |
|
|
1487 |
|
|
1488 if (id) |
|
|
1489 { |
|
|
1490 retval = id->eval (print); |
|
|
1491 id->bump_value (etype); |
|
|
1492 if (error_state) |
|
|
1493 { |
|
|
1494 retval = tree_constant (); |
|
|
1495 if (error_state) |
|
|
1496 eval_error (); |
|
|
1497 } |
|
|
1498 } |
|
|
1499 return retval; |
|
|
1500 } |
|
|
1501 |
|
|
1502 char * |
|
|
1503 tree_postfix_expression::oper (void) const |
|
|
1504 { |
|
|
1505 static char *op; |
|
|
1506 switch (etype) |
|
|
1507 { |
|
777
|
1508 case tree_expression::increment: |
|
|
1509 op = "++"; |
|
|
1510 break; |
|
|
1511 |
|
|
1512 case tree_expression::decrement: |
|
|
1513 op = "--"; |
|
|
1514 break; |
|
|
1515 |
|
|
1516 default: |
|
|
1517 op = "<unknown>"; |
|
|
1518 break; |
|
581
|
1519 } |
|
|
1520 return op; |
|
|
1521 } |
|
|
1522 |
|
|
1523 void |
|
|
1524 tree_postfix_expression::eval_error (void) |
|
|
1525 { |
|
|
1526 if (error_state > 0) |
|
|
1527 { |
|
|
1528 char *op = oper (); |
|
|
1529 |
|
|
1530 ::error ("evaluating postfix operator `%s' near line %d, column %d", |
|
|
1531 op, line (), column ()); |
|
|
1532 } |
|
|
1533 } |
|
|
1534 |
|
|
1535 void |
|
|
1536 tree_postfix_expression::print_code (ostream& os) |
|
|
1537 { |
|
|
1538 print_code_indent (os); |
|
|
1539 |
|
|
1540 if (in_parens) |
|
|
1541 os << "("; |
|
|
1542 |
|
|
1543 if (id) |
|
|
1544 id->print_code (os); |
|
|
1545 |
|
|
1546 os << oper (); |
|
|
1547 |
|
|
1548 if (in_parens) |
|
|
1549 os << ")"; |
|
|
1550 } |
|
|
1551 |
|
|
1552 // Unary expressions. |
|
|
1553 |
|
|
1554 tree_constant |
|
|
1555 tree_unary_expression::eval (int print) |
|
|
1556 { |
|
|
1557 if (error_state) |
|
|
1558 return tree_constant (); |
|
|
1559 |
|
712
|
1560 tree_constant retval; |
|
581
|
1561 |
|
|
1562 switch (etype) |
|
|
1563 { |
|
|
1564 case tree_expression::not: |
|
|
1565 case tree_expression::uminus: |
|
|
1566 case tree_expression::hermitian: |
|
|
1567 case tree_expression::transpose: |
|
|
1568 if (op) |
|
|
1569 { |
|
636
|
1570 tree_constant u = op->eval (0); |
|
581
|
1571 if (error_state) |
|
|
1572 eval_error (); |
|
|
1573 else if (u.is_defined ()) |
|
|
1574 { |
|
712
|
1575 retval = do_unary_op (u, etype); |
|
581
|
1576 if (error_state) |
|
|
1577 { |
|
712
|
1578 retval = tree_constant (); |
|
581
|
1579 if (error_state) |
|
|
1580 eval_error (); |
|
|
1581 } |
|
|
1582 } |
|
|
1583 } |
|
|
1584 break; |
|
777
|
1585 |
|
581
|
1586 default: |
|
|
1587 ::error ("unary operator %d not implemented", etype); |
|
|
1588 break; |
|
|
1589 } |
|
|
1590 |
|
712
|
1591 return retval; |
|
581
|
1592 } |
|
|
1593 |
|
|
1594 char * |
|
|
1595 tree_unary_expression::oper (void) const |
|
|
1596 { |
|
|
1597 static char *op; |
|
|
1598 switch (etype) |
|
|
1599 { |
|
777
|
1600 case tree_expression::not: |
|
|
1601 op = "!"; |
|
|
1602 break; |
|
|
1603 |
|
|
1604 case tree_expression::uminus: |
|
|
1605 op = "-"; |
|
|
1606 break; |
|
|
1607 |
|
|
1608 case tree_expression::hermitian: |
|
|
1609 op = "'"; |
|
|
1610 break; |
|
|
1611 |
|
|
1612 case tree_expression::transpose: |
|
|
1613 op = ".'"; |
|
|
1614 break; |
|
|
1615 |
|
|
1616 default: |
|
|
1617 op = "<unknown>"; |
|
|
1618 break; |
|
581
|
1619 } |
|
|
1620 return op; |
|
|
1621 } |
|
|
1622 |
|
|
1623 void |
|
|
1624 tree_unary_expression::eval_error (void) |
|
|
1625 { |
|
|
1626 if (error_state > 0) |
|
|
1627 { |
|
|
1628 char *op = oper (); |
|
|
1629 |
|
|
1630 ::error ("evaluating unary operator `%s' near line %d, column %d", |
|
|
1631 op, line (), column ()); |
|
|
1632 } |
|
|
1633 } |
|
|
1634 |
|
|
1635 void |
|
|
1636 tree_unary_expression::print_code (ostream& os) |
|
|
1637 { |
|
|
1638 print_code_indent (os); |
|
|
1639 |
|
|
1640 if (in_parens) |
|
|
1641 os << "("; |
|
|
1642 |
|
|
1643 switch (etype) |
|
|
1644 { |
|
|
1645 case tree_expression::not: |
|
|
1646 case tree_expression::uminus: |
|
|
1647 os << oper (); |
|
|
1648 if (op) |
|
|
1649 op->print_code (os); |
|
|
1650 break; |
|
777
|
1651 |
|
581
|
1652 case tree_expression::hermitian: |
|
|
1653 case tree_expression::transpose: |
|
|
1654 if (op) |
|
|
1655 op->print_code (os); |
|
|
1656 os << oper (); |
|
|
1657 break; |
|
777
|
1658 |
|
581
|
1659 default: |
|
772
|
1660 os << oper (); |
|
|
1661 if (op) |
|
|
1662 op->print_code (os); |
|
581
|
1663 break; |
|
|
1664 } |
|
|
1665 |
|
|
1666 if (in_parens) |
|
|
1667 os << ")"; |
|
|
1668 } |
|
|
1669 |
|
|
1670 // Binary expressions. |
|
|
1671 |
|
|
1672 tree_constant |
|
|
1673 tree_binary_expression::eval (int print) |
|
|
1674 { |
|
|
1675 if (error_state) |
|
|
1676 return tree_constant (); |
|
|
1677 |
|
712
|
1678 tree_constant retval; |
|
|
1679 |
|
581
|
1680 switch (etype) |
|
|
1681 { |
|
|
1682 case tree_expression::add: |
|
|
1683 case tree_expression::subtract: |
|
|
1684 case tree_expression::multiply: |
|
|
1685 case tree_expression::el_mul: |
|
|
1686 case tree_expression::divide: |
|
|
1687 case tree_expression::el_div: |
|
|
1688 case tree_expression::leftdiv: |
|
|
1689 case tree_expression::el_leftdiv: |
|
|
1690 case tree_expression::power: |
|
|
1691 case tree_expression::elem_pow: |
|
|
1692 case tree_expression::cmp_lt: |
|
|
1693 case tree_expression::cmp_le: |
|
|
1694 case tree_expression::cmp_eq: |
|
|
1695 case tree_expression::cmp_ge: |
|
|
1696 case tree_expression::cmp_gt: |
|
|
1697 case tree_expression::cmp_ne: |
|
|
1698 case tree_expression::and: |
|
|
1699 case tree_expression::or: |
|
|
1700 if (op1) |
|
|
1701 { |
|
636
|
1702 tree_constant a = op1->eval (0); |
|
581
|
1703 if (error_state) |
|
|
1704 eval_error (); |
|
|
1705 else if (a.is_defined () && op2) |
|
|
1706 { |
|
636
|
1707 tree_constant b = op2->eval (0); |
|
581
|
1708 if (error_state) |
|
|
1709 eval_error (); |
|
|
1710 else if (b.is_defined ()) |
|
|
1711 { |
|
712
|
1712 retval = do_binary_op (a, b, etype); |
|
581
|
1713 if (error_state) |
|
|
1714 { |
|
712
|
1715 retval = tree_constant (); |
|
581
|
1716 if (error_state) |
|
|
1717 eval_error (); |
|
|
1718 } |
|
|
1719 } |
|
|
1720 } |
|
|
1721 } |
|
|
1722 break; |
|
777
|
1723 |
|
581
|
1724 case tree_expression::and_and: |
|
|
1725 case tree_expression::or_or: |
|
|
1726 { |
|
|
1727 int result = 0; |
|
|
1728 if (op1) |
|
|
1729 { |
|
636
|
1730 tree_constant a = op1->eval (0); |
|
581
|
1731 if (error_state) |
|
|
1732 { |
|
|
1733 eval_error (); |
|
|
1734 break; |
|
|
1735 } |
|
|
1736 |
|
|
1737 int a_true = a.is_true (); |
|
|
1738 if (error_state) |
|
|
1739 { |
|
|
1740 eval_error (); |
|
|
1741 break; |
|
|
1742 } |
|
|
1743 |
|
|
1744 if (a_true) |
|
|
1745 { |
|
|
1746 if (etype == tree_expression::or_or) |
|
|
1747 { |
|
|
1748 result = 1; |
|
|
1749 goto done; |
|
|
1750 } |
|
|
1751 } |
|
|
1752 else |
|
|
1753 { |
|
|
1754 if (etype == tree_expression::and_and) |
|
|
1755 { |
|
|
1756 result = 0; |
|
|
1757 goto done; |
|
|
1758 } |
|
|
1759 } |
|
|
1760 |
|
|
1761 if (op2) |
|
|
1762 { |
|
636
|
1763 tree_constant b = op2->eval (0); |
|
581
|
1764 if (error_state) |
|
|
1765 { |
|
|
1766 eval_error (); |
|
|
1767 break; |
|
|
1768 } |
|
|
1769 |
|
|
1770 result = b.is_true (); |
|
|
1771 if (error_state) |
|
|
1772 { |
|
|
1773 eval_error (); |
|
|
1774 break; |
|
|
1775 } |
|
|
1776 } |
|
|
1777 } |
|
|
1778 done: |
|
712
|
1779 retval = tree_constant ((double) result); |
|
581
|
1780 } |
|
|
1781 break; |
|
777
|
1782 |
|
581
|
1783 default: |
|
|
1784 ::error ("binary operator %d not implemented", etype); |
|
|
1785 break; |
|
|
1786 } |
|
|
1787 |
|
712
|
1788 return retval; |
|
581
|
1789 } |
|
|
1790 |
|
|
1791 char * |
|
|
1792 tree_binary_expression::oper (void) const |
|
|
1793 { |
|
|
1794 static char *op; |
|
|
1795 switch (etype) |
|
|
1796 { |
|
777
|
1797 case tree_expression::add: |
|
|
1798 op = "+"; |
|
|
1799 break; |
|
|
1800 |
|
|
1801 case tree_expression::subtract: |
|
|
1802 op = "-"; |
|
|
1803 break; |
|
|
1804 |
|
|
1805 case tree_expression::multiply: |
|
|
1806 op = "*"; |
|
|
1807 break; |
|
|
1808 |
|
|
1809 case tree_expression::el_mul: |
|
|
1810 op = ".*"; |
|
|
1811 break; |
|
|
1812 |
|
|
1813 case tree_expression::divide: |
|
|
1814 op = "/"; |
|
|
1815 break; |
|
|
1816 |
|
|
1817 case tree_expression::el_div: |
|
|
1818 op = "./"; |
|
|
1819 break; |
|
|
1820 |
|
|
1821 case tree_expression::leftdiv: |
|
|
1822 op = "\\"; |
|
|
1823 break; |
|
|
1824 |
|
|
1825 case tree_expression::el_leftdiv: |
|
|
1826 op = ".\\"; |
|
|
1827 break; |
|
|
1828 |
|
|
1829 case tree_expression::power: |
|
|
1830 op = "^"; |
|
|
1831 break; |
|
|
1832 |
|
|
1833 case tree_expression::elem_pow: |
|
|
1834 op = ".^"; |
|
|
1835 break; |
|
|
1836 |
|
|
1837 case tree_expression::cmp_lt: |
|
|
1838 op = "<"; |
|
|
1839 break; |
|
|
1840 |
|
|
1841 case tree_expression::cmp_le: |
|
|
1842 op = "<="; |
|
|
1843 break; |
|
|
1844 |
|
|
1845 case tree_expression::cmp_eq: |
|
|
1846 op = "=="; |
|
|
1847 break; |
|
|
1848 |
|
|
1849 case tree_expression::cmp_ge: |
|
|
1850 op = ">="; |
|
|
1851 break; |
|
|
1852 |
|
|
1853 case tree_expression::cmp_gt: |
|
|
1854 op = ">"; |
|
|
1855 break; |
|
|
1856 |
|
|
1857 case tree_expression::cmp_ne: |
|
|
1858 op = "!="; |
|
|
1859 break; |
|
|
1860 |
|
|
1861 case tree_expression::and_and: |
|
|
1862 op = "&&"; |
|
|
1863 break; |
|
|
1864 |
|
|
1865 case tree_expression::or_or: |
|
|
1866 op = "||"; |
|
|
1867 break; |
|
|
1868 |
|
|
1869 case tree_expression::and: |
|
|
1870 op = "&"; |
|
|
1871 break; |
|
|
1872 |
|
|
1873 case tree_expression::or: |
|
|
1874 op = "|"; |
|
|
1875 break; |
|
|
1876 |
|
|
1877 default: |
|
|
1878 op = "<unknown>"; |
|
|
1879 break; |
|
581
|
1880 } |
|
|
1881 return op; |
|
|
1882 } |
|
|
1883 |
|
|
1884 void |
|
|
1885 tree_binary_expression::eval_error (void) |
|
|
1886 { |
|
|
1887 if (error_state > 0) |
|
|
1888 { |
|
|
1889 char *op = oper (); |
|
|
1890 |
|
|
1891 ::error ("evaluating binary operator `%s' near line %d, column %d", |
|
|
1892 op, line (), column ()); |
|
|
1893 } |
|
|
1894 } |
|
|
1895 |
|
|
1896 void |
|
|
1897 tree_binary_expression::print_code (ostream& os) |
|
|
1898 { |
|
|
1899 print_code_indent (os); |
|
|
1900 |
|
|
1901 if (in_parens) |
|
|
1902 os << "("; |
|
|
1903 |
|
|
1904 if (op1) |
|
|
1905 op1->print_code (os); |
|
|
1906 |
|
|
1907 os << " " << oper () << " "; |
|
|
1908 |
|
|
1909 if (op2) |
|
|
1910 op2->print_code (os); |
|
|
1911 |
|
|
1912 if (in_parens) |
|
|
1913 os << ")"; |
|
|
1914 } |
|
|
1915 |
|
|
1916 // Simple assignment expressions. |
|
|
1917 |
|
|
1918 tree_simple_assignment_expression::~tree_simple_assignment_expression (void) |
|
|
1919 { |
|
|
1920 if (! preserve) |
|
|
1921 { |
|
|
1922 delete lhs; |
|
|
1923 delete index; |
|
|
1924 } |
|
|
1925 delete rhs; |
|
|
1926 } |
|
|
1927 |
|
|
1928 tree_constant |
|
|
1929 tree_simple_assignment_expression::eval (int print) |
|
|
1930 { |
|
|
1931 assert (etype == tree_expression::assignment); |
|
|
1932 |
|
|
1933 tree_constant retval; |
|
|
1934 |
|
|
1935 if (error_state) |
|
|
1936 return retval; |
|
|
1937 |
|
|
1938 if (rhs) |
|
|
1939 { |
|
636
|
1940 tree_constant rhs_val = rhs->eval (0); |
|
581
|
1941 if (error_state) |
|
|
1942 { |
|
1093
|
1943 eval_error (); |
|
|
1944 } |
|
|
1945 else if (rhs_val.is_undefined ()) |
|
|
1946 { |
|
|
1947 error ("value on right hand side of assignment is undefined"); |
|
|
1948 eval_error (); |
|
581
|
1949 } |
|
|
1950 else if (! index) |
|
|
1951 { |
|
712
|
1952 retval = lhs->assign (rhs_val); |
|
581
|
1953 if (error_state) |
|
|
1954 eval_error (); |
|
|
1955 } |
|
|
1956 else |
|
|
1957 { |
|
|
1958 // Extract the arguments into a simple vector. |
|
712
|
1959 |
|
581
|
1960 Octave_object args = index->convert_to_const_vector (); |
|
|
1961 |
|
|
1962 if (error_state) |
|
|
1963 eval_error (); |
|
922
|
1964 else |
|
581
|
1965 { |
|
922
|
1966 int nargin = args.length (); |
|
|
1967 |
|
581
|
1968 if (error_state) |
|
|
1969 eval_error (); |
|
922
|
1970 else if (nargin > 0) |
|
|
1971 { |
|
|
1972 retval = lhs->assign (rhs_val, args); |
|
|
1973 if (error_state) |
|
|
1974 eval_error (); |
|
|
1975 } |
|
581
|
1976 } |
|
|
1977 } |
|
|
1978 } |
|
|
1979 |
|
712
|
1980 if (! error_state && retval.is_defined ()) |
|
581
|
1981 { |
|
|
1982 int pad_after = 0; |
|
|
1983 if (print && user_pref.print_answer_id_name) |
|
|
1984 { |
|
712
|
1985 if (print_as_scalar (retval)) |
|
581
|
1986 { |
|
|
1987 ostrstream output_buf; |
|
|
1988 output_buf << lhs->name () << " = " << ends; |
|
|
1989 maybe_page_output (output_buf); |
|
|
1990 } |
|
|
1991 else |
|
|
1992 { |
|
|
1993 pad_after = 1; |
|
|
1994 ostrstream output_buf; |
|
|
1995 output_buf << lhs->name () << " =\n\n" << ends; |
|
|
1996 maybe_page_output (output_buf); |
|
|
1997 } |
|
|
1998 } |
|
|
1999 |
|
712
|
2000 retval.eval (print); |
|
581
|
2001 |
|
|
2002 if (print && pad_after) |
|
|
2003 { |
|
|
2004 ostrstream output_buf; |
|
|
2005 output_buf << "\n" << ends; |
|
|
2006 maybe_page_output (output_buf); |
|
|
2007 } |
|
|
2008 } |
|
|
2009 |
|
|
2010 return retval; |
|
|
2011 } |
|
|
2012 |
|
|
2013 void |
|
|
2014 tree_simple_assignment_expression::eval_error (void) |
|
|
2015 { |
|
|
2016 if (error_state > 0) |
|
|
2017 { |
|
|
2018 int l = line (); |
|
|
2019 int c = column (); |
|
|
2020 if (l != -1 && c != -1) |
|
|
2021 ::error ("evaluating assignment expression near line %d, column %d", |
|
|
2022 l, c); |
|
|
2023 // else |
|
749
|
2024 // ::error ("evaluating assignment expression"); |
|
581
|
2025 } |
|
|
2026 } |
|
|
2027 |
|
|
2028 void |
|
|
2029 tree_simple_assignment_expression::print_code (ostream& os) |
|
|
2030 { |
|
|
2031 print_code_indent (os); |
|
|
2032 |
|
|
2033 if (in_parens) |
|
|
2034 os << "("; |
|
|
2035 |
|
|
2036 if (! is_ans_assign ()) |
|
|
2037 { |
|
|
2038 if (lhs) |
|
|
2039 lhs->print_code (os); |
|
|
2040 |
|
|
2041 if (index) |
|
|
2042 { |
|
|
2043 os << " ("; |
|
|
2044 index->print_code (os); |
|
|
2045 os << ")"; |
|
|
2046 } |
|
|
2047 |
|
|
2048 os << " = "; |
|
|
2049 } |
|
|
2050 |
|
|
2051 if (rhs) |
|
|
2052 rhs->print_code (os); |
|
|
2053 |
|
|
2054 if (in_parens) |
|
|
2055 os << ")"; |
|
|
2056 } |
|
|
2057 |
|
|
2058 // Multi-valued assignmnt expressions. |
|
|
2059 |
|
|
2060 tree_multi_assignment_expression::~tree_multi_assignment_expression (void) |
|
|
2061 { |
|
|
2062 delete lhs; |
|
|
2063 delete rhs; |
|
|
2064 } |
|
|
2065 |
|
|
2066 tree_constant |
|
|
2067 tree_multi_assignment_expression::eval (int print) |
|
|
2068 { |
|
|
2069 tree_constant retval; |
|
|
2070 |
|
|
2071 if (error_state) |
|
|
2072 return retval; |
|
|
2073 |
|
|
2074 Octave_object tmp_args; |
|
|
2075 Octave_object result = eval (print, 1, tmp_args); |
|
|
2076 |
|
|
2077 if (result.length () > 0) |
|
|
2078 retval = result(0); |
|
|
2079 |
|
|
2080 return retval; |
|
|
2081 } |
|
|
2082 |
|
|
2083 Octave_object |
|
|
2084 tree_multi_assignment_expression::eval (int print, int nargout, |
|
|
2085 const Octave_object& args) |
|
|
2086 { |
|
|
2087 assert (etype == tree_expression::multi_assignment); |
|
|
2088 |
|
|
2089 if (error_state || ! rhs) |
|
|
2090 return Octave_object (); |
|
|
2091 |
|
|
2092 nargout = lhs->length (); |
|
|
2093 Octave_object tmp_args; |
|
|
2094 Octave_object results = rhs->eval (0, nargout, tmp_args); |
|
|
2095 |
|
|
2096 if (error_state) |
|
|
2097 eval_error (); |
|
|
2098 |
|
|
2099 int ma_line = line (); |
|
|
2100 int ma_column = column (); |
|
|
2101 |
|
|
2102 if (results.length () > 0) |
|
|
2103 { |
|
|
2104 int i = 0; |
|
|
2105 int pad_after = 0; |
|
|
2106 int last_was_scalar_type = 0; |
|
|
2107 for (Pix p = lhs->first (); p != 0; lhs->next (p)) |
|
|
2108 { |
|
1155
|
2109 tree_index_expression *lhs_expr = lhs->operator () (p); |
|
581
|
2110 |
|
|
2111 if (i < nargout) |
|
|
2112 { |
|
|
2113 // XXX FIXME? XXX -- this is apparently the way Matlab works, but |
|
|
2114 // maybe we should have the option of skipping the assignment instead. |
|
|
2115 |
|
|
2116 tree_constant *tmp = 0; |
|
|
2117 if (results(i).is_undefined ()) |
|
|
2118 { |
|
1093
|
2119 error ("element number %d undefined in return list", i+1); |
|
|
2120 eval_error (); |
|
|
2121 break; |
|
581
|
2122 } |
|
|
2123 else |
|
|
2124 tmp = new tree_constant (results(i)); |
|
|
2125 |
|
|
2126 tree_simple_assignment_expression tmp_expr |
|
|
2127 (lhs_expr, tmp, 1, 0, ma_line, ma_column); |
|
|
2128 |
|
|
2129 results(i) = tmp_expr.eval (0); // May change |
|
|
2130 |
|
|
2131 if (error_state) |
|
|
2132 break; |
|
|
2133 |
|
|
2134 if (print && pad_after) |
|
|
2135 { |
|
|
2136 ostrstream output_buf; |
|
|
2137 output_buf << "\n" << '\0'; |
|
|
2138 maybe_page_output (output_buf); |
|
|
2139 } |
|
|
2140 |
|
|
2141 if (print && user_pref.print_answer_id_name) |
|
|
2142 { |
|
749
|
2143 char *tmp_nm = lhs_expr->name (); |
|
581
|
2144 |
|
|
2145 if (print_as_scalar (results(i))) |
|
|
2146 { |
|
|
2147 ostrstream output_buf; |
|
|
2148 output_buf << tmp_nm << " = " << '\0'; |
|
|
2149 maybe_page_output (output_buf); |
|
|
2150 last_was_scalar_type = 1; |
|
|
2151 } |
|
|
2152 else |
|
|
2153 { |
|
|
2154 ostrstream output_buf; |
|
|
2155 output_buf << tmp_nm << " =\n\n" << '\0'; |
|
|
2156 maybe_page_output (output_buf); |
|
|
2157 last_was_scalar_type = 0; |
|
|
2158 } |
|
|
2159 } |
|
|
2160 |
|
|
2161 results(i).eval (print); |
|
|
2162 |
|
|
2163 pad_after++; |
|
|
2164 i++; |
|
|
2165 } |
|
|
2166 else |
|
|
2167 { |
|
|
2168 tree_simple_assignment_expression tmp_expr |
|
|
2169 (lhs_expr, 0, 1, 0, ma_line, ma_column); |
|
|
2170 |
|
|
2171 tmp_expr.eval (0); |
|
|
2172 |
|
|
2173 if (error_state) |
|
|
2174 break; |
|
|
2175 |
|
|
2176 if (last_was_scalar_type && i == 1) |
|
|
2177 pad_after = 0; |
|
|
2178 |
|
|
2179 break; |
|
|
2180 } |
|
|
2181 } |
|
|
2182 |
|
|
2183 if (print && pad_after) |
|
|
2184 { |
|
|
2185 ostrstream output_buf; |
|
|
2186 output_buf << "\n" << '\0'; |
|
|
2187 maybe_page_output (output_buf); |
|
|
2188 } |
|
|
2189 } |
|
|
2190 |
|
|
2191 return results; |
|
|
2192 } |
|
|
2193 |
|
|
2194 void |
|
|
2195 tree_multi_assignment_expression::eval_error (void) |
|
|
2196 { |
|
|
2197 if (error_state > 0) |
|
|
2198 ::error ("evaluating assignment expression near line %d, column %d", |
|
|
2199 line (), column ()); |
|
|
2200 } |
|
|
2201 |
|
|
2202 void |
|
|
2203 tree_multi_assignment_expression::print_code (ostream& os) |
|
|
2204 { |
|
|
2205 print_code_indent (os); |
|
|
2206 |
|
|
2207 if (in_parens) |
|
|
2208 os << "("; |
|
|
2209 |
|
|
2210 if (lhs) |
|
|
2211 { |
|
|
2212 int len = lhs->length (); |
|
|
2213 |
|
|
2214 if (len > 1) |
|
|
2215 os << "["; |
|
|
2216 |
|
|
2217 lhs->print_code (os); |
|
|
2218 |
|
|
2219 if (len > 1) |
|
|
2220 os << "]"; |
|
|
2221 } |
|
|
2222 |
|
|
2223 os << " = "; |
|
|
2224 |
|
|
2225 if (rhs) |
|
|
2226 rhs->print_code (os); |
|
|
2227 |
|
|
2228 if (in_parens) |
|
|
2229 os << ")"; |
|
|
2230 } |
|
|
2231 |
|
|
2232 // Colon expressions. |
|
|
2233 |
|
|
2234 tree_colon_expression * |
|
|
2235 tree_colon_expression::chain (tree_expression *t) |
|
|
2236 { |
|
|
2237 tree_colon_expression *retval = 0; |
|
|
2238 if (! op1 || op3) |
|
|
2239 ::error ("invalid colon expression"); |
|
|
2240 else |
|
|
2241 { |
|
|
2242 op3 = op2; // Stupid syntax. |
|
|
2243 op2 = t; |
|
|
2244 |
|
|
2245 retval = this; |
|
|
2246 } |
|
|
2247 return retval; |
|
|
2248 } |
|
|
2249 |
|
|
2250 tree_constant |
|
|
2251 tree_colon_expression::eval (int print) |
|
|
2252 { |
|
|
2253 tree_constant retval; |
|
|
2254 |
|
|
2255 if (error_state || ! op1 || ! op2) |
|
|
2256 return retval; |
|
|
2257 |
|
636
|
2258 tree_constant tmp = op1->eval (0); |
|
581
|
2259 |
|
|
2260 if (tmp.is_undefined ()) |
|
|
2261 { |
|
|
2262 eval_error ("invalid null value in colon expression"); |
|
|
2263 return retval; |
|
|
2264 } |
|
|
2265 |
|
636
|
2266 double base = tmp.double_value (); |
|
|
2267 |
|
|
2268 if (error_state) |
|
581
|
2269 { |
|
1055
|
2270 error ("colon expression elements must be scalars"); |
|
636
|
2271 eval_error ("evaluating colon expression"); |
|
581
|
2272 return retval; |
|
|
2273 } |
|
636
|
2274 |
|
|
2275 tmp = op2->eval (0); |
|
581
|
2276 |
|
|
2277 if (tmp.is_undefined ()) |
|
|
2278 { |
|
|
2279 eval_error ("invalid null value in colon expression"); |
|
|
2280 return retval; |
|
|
2281 } |
|
|
2282 |
|
636
|
2283 double limit = tmp.double_value (); |
|
|
2284 |
|
|
2285 if (error_state) |
|
581
|
2286 { |
|
1055
|
2287 error ("colon expression elements must be scalars"); |
|
636
|
2288 eval_error ("evaluating colon expression"); |
|
581
|
2289 return retval; |
|
|
2290 } |
|
|
2291 |
|
|
2292 double inc = 1.0; |
|
|
2293 if (op3) |
|
|
2294 { |
|
636
|
2295 tmp = op3->eval (0); |
|
581
|
2296 |
|
|
2297 if (tmp.is_undefined ()) |
|
|
2298 { |
|
|
2299 eval_error ("invalid null value in colon expression"); |
|
|
2300 return retval; |
|
|
2301 } |
|
|
2302 |
|
636
|
2303 inc = tmp.double_value (); |
|
|
2304 |
|
|
2305 if (error_state) |
|
581
|
2306 { |
|
1055
|
2307 error ("colon expression elements must be scalars"); |
|
636
|
2308 eval_error ("evaluating colon expression"); |
|
581
|
2309 return retval; |
|
|
2310 } |
|
|
2311 } |
|
|
2312 |
|
|
2313 retval = tree_constant (base, limit, inc); |
|
|
2314 |
|
|
2315 if (error_state) |
|
|
2316 { |
|
|
2317 if (error_state) |
|
|
2318 eval_error ("evaluating colon expression"); |
|
|
2319 return tree_constant (); |
|
|
2320 } |
|
|
2321 |
|
|
2322 return retval; |
|
|
2323 } |
|
|
2324 |
|
|
2325 void |
|
|
2326 tree_colon_expression::eval_error (const char *s) |
|
|
2327 { |
|
|
2328 if (error_state > 0) |
|
|
2329 ::error ("%s near line %d column %d", s, line (), column ()); |
|
|
2330 } |
|
|
2331 |
|
|
2332 void |
|
|
2333 tree_colon_expression::print_code (ostream& os) |
|
|
2334 { |
|
|
2335 print_code_indent (os); |
|
|
2336 |
|
|
2337 if (in_parens) |
|
|
2338 os << "("; |
|
|
2339 |
|
|
2340 if (op1) |
|
|
2341 op1->print_code (os); |
|
|
2342 |
|
|
2343 // Stupid syntax. |
|
|
2344 |
|
|
2345 if (op3) |
|
|
2346 { |
|
|
2347 os << ":"; |
|
|
2348 op3->print_code (os); |
|
|
2349 } |
|
|
2350 |
|
|
2351 if (op2) |
|
|
2352 { |
|
|
2353 os << ":"; |
|
|
2354 op2->print_code (os); |
|
|
2355 } |
|
|
2356 |
|
|
2357 if (in_parens) |
|
|
2358 os << ")"; |
|
|
2359 } |
|
|
2360 |
|
|
2361 // Builtin functions. |
|
|
2362 |
|
|
2363 tree_builtin::tree_builtin (const char *nm) |
|
|
2364 { |
|
|
2365 nargin_max = -1; |
|
|
2366 nargout_max = -1; |
|
|
2367 is_mapper = 0; |
|
|
2368 fcn = 0; |
|
|
2369 if (nm) |
|
|
2370 my_name = strsave (nm); |
|
|
2371 } |
|
|
2372 |
|
|
2373 tree_builtin::tree_builtin (int i_max, int o_max, Mapper_fcn& m_fcn, |
|
|
2374 const char *nm) |
|
|
2375 { |
|
|
2376 nargin_max = i_max; |
|
|
2377 nargout_max = o_max; |
|
|
2378 mapper_fcn = m_fcn; |
|
|
2379 is_mapper = 1; |
|
|
2380 fcn = 0; |
|
704
|
2381 my_name = nm ? strsave (nm) : 0; |
|
581
|
2382 } |
|
|
2383 |
|
|
2384 tree_builtin::tree_builtin (int i_max, int o_max, Octave_builtin_fcn g_fcn, |
|
|
2385 const char *nm) |
|
|
2386 { |
|
|
2387 nargin_max = i_max; |
|
|
2388 nargout_max = o_max; |
|
|
2389 is_mapper = 0; |
|
|
2390 fcn = g_fcn; |
|
704
|
2391 my_name = nm ? strsave (nm) : 0; |
|
581
|
2392 } |
|
|
2393 |
|
|
2394 tree_constant |
|
|
2395 tree_builtin::eval (int print) |
|
|
2396 { |
|
|
2397 tree_constant retval; |
|
|
2398 |
|
|
2399 if (error_state) |
|
|
2400 return retval; |
|
|
2401 |
|
|
2402 if (fcn) |
|
|
2403 { |
|
704
|
2404 eval_fcn: |
|
|
2405 |
|
581
|
2406 Octave_object args; |
|
1029
|
2407 Octave_object tmp = (*fcn) (args, 0); |
|
581
|
2408 if (tmp.length () > 0) |
|
|
2409 retval = tmp(0); |
|
|
2410 } |
|
704
|
2411 else |
|
|
2412 { |
|
|
2413 fcn = load_octave_builtin (my_name); |
|
|
2414 |
|
|
2415 if (fcn) |
|
|
2416 goto eval_fcn; |
|
|
2417 else |
|
749
|
2418 ::error ("unable to load builtin function %s", my_name); |
|
704
|
2419 } |
|
581
|
2420 |
|
|
2421 return retval; |
|
|
2422 } |
|
|
2423 |
|
767
|
2424 static tree_constant |
|
|
2425 apply_mapper_fcn (const tree_constant& arg, Mapper_fcn& m_fcn, int print) |
|
|
2426 { |
|
|
2427 tree_constant retval; |
|
|
2428 |
|
|
2429 if (arg.is_real_type ()) |
|
|
2430 { |
|
|
2431 if (arg.is_scalar_type ()) |
|
|
2432 { |
|
|
2433 double d = arg.double_value (); |
|
|
2434 |
|
|
2435 if (m_fcn.can_return_complex_for_real_arg |
|
|
2436 && (d < m_fcn.lower_limit || d > m_fcn.upper_limit)) |
|
|
2437 { |
|
|
2438 if (m_fcn.c_c_mapper) |
|
|
2439 retval = m_fcn.c_c_mapper (Complex (d)); |
|
|
2440 else |
|
|
2441 error ("%s: unable to handle real arguments", m_fcn.name); |
|
|
2442 } |
|
|
2443 else if (m_fcn.d_d_mapper) |
|
|
2444 retval = m_fcn.d_d_mapper (d); |
|
|
2445 else |
|
|
2446 error ("%s: unable to handle real arguments", m_fcn.name); |
|
|
2447 } |
|
788
|
2448 else |
|
767
|
2449 { |
|
|
2450 Matrix m = arg.matrix_value (); |
|
|
2451 |
|
788
|
2452 if (error_state) |
|
|
2453 return retval; |
|
|
2454 |
|
767
|
2455 if (m_fcn.can_return_complex_for_real_arg |
|
|
2456 && (any_element_less_than (m, m_fcn.lower_limit) |
|
|
2457 || any_element_greater_than (m, m_fcn.upper_limit))) |
|
|
2458 { |
|
|
2459 if (m_fcn.c_c_mapper) |
|
|
2460 retval = map (m_fcn.c_c_mapper, ComplexMatrix (m)); |
|
|
2461 else |
|
|
2462 error ("%s: unable to handle real arguments", m_fcn.name); |
|
|
2463 } |
|
|
2464 else if (m_fcn.d_d_mapper) |
|
|
2465 retval = map (m_fcn.d_d_mapper, m); |
|
|
2466 else |
|
|
2467 error ("%s: unable to handle real arguments", m_fcn.name); |
|
|
2468 } |
|
|
2469 } |
|
|
2470 else if (arg.is_complex_type ()) |
|
|
2471 { |
|
|
2472 if (arg.is_scalar_type ()) |
|
|
2473 { |
|
|
2474 Complex c = arg.complex_value (); |
|
|
2475 |
|
|
2476 if (m_fcn.d_c_mapper) |
|
|
2477 retval = m_fcn.d_c_mapper (c); |
|
|
2478 else if (m_fcn.c_c_mapper) |
|
|
2479 retval = m_fcn.c_c_mapper (c); |
|
|
2480 else |
|
|
2481 error ("%s: unable to handle complex arguments", m_fcn.name); |
|
|
2482 } |
|
788
|
2483 else |
|
767
|
2484 { |
|
|
2485 ComplexMatrix cm = arg.complex_matrix_value (); |
|
|
2486 |
|
788
|
2487 if (error_state) |
|
|
2488 return retval; |
|
|
2489 |
|
767
|
2490 if (m_fcn.d_c_mapper) |
|
|
2491 retval = map (m_fcn.d_c_mapper, cm); |
|
|
2492 else if (m_fcn.c_c_mapper) |
|
|
2493 retval = map (m_fcn.c_c_mapper, cm); |
|
|
2494 else |
|
|
2495 error ("%s: unable to handle complex arguments", m_fcn.name); |
|
|
2496 } |
|
|
2497 } |
|
|
2498 else |
|
|
2499 gripe_wrong_type_arg ("mapper", arg); |
|
|
2500 |
|
|
2501 return retval; |
|
|
2502 } |
|
|
2503 |
|
581
|
2504 Octave_object |
|
|
2505 tree_builtin::eval (int print, int nargout, const Octave_object& args) |
|
|
2506 { |
|
|
2507 Octave_object retval; |
|
|
2508 |
|
|
2509 if (error_state) |
|
|
2510 return retval; |
|
|
2511 |
|
|
2512 int nargin = args.length (); |
|
|
2513 |
|
|
2514 if (fcn) |
|
|
2515 { |
|
704
|
2516 eval_fcn: |
|
|
2517 |
|
581
|
2518 if (any_arg_is_magic_colon (args)) |
|
|
2519 ::error ("invalid use of colon in function argument list"); |
|
|
2520 else |
|
|
2521 retval = (*fcn) (args, nargout); |
|
|
2522 } |
|
|
2523 else if (is_mapper) |
|
|
2524 { |
|
|
2525 if (nargin > nargin_max) |
|
|
2526 ::error ("%s: too many arguments", my_name); |
|
712
|
2527 else if (nargin > 0 && args(0).is_defined ()) |
|
581
|
2528 { |
|
767
|
2529 tree_constant tmp = apply_mapper_fcn (args(0), mapper_fcn, 0); |
|
581
|
2530 retval(0) = tmp; |
|
|
2531 } |
|
|
2532 } |
|
|
2533 else |
|
704
|
2534 { |
|
|
2535 fcn = load_octave_builtin (my_name); |
|
|
2536 |
|
|
2537 if (fcn) |
|
|
2538 goto eval_fcn; |
|
|
2539 else |
|
749
|
2540 ::error ("unable to load builtin function %s", my_name); |
|
704
|
2541 } |
|
581
|
2542 |
|
|
2543 return retval; |
|
|
2544 } |
|
|
2545 |
|
|
2546 int |
|
|
2547 tree_builtin::max_expected_args (void) |
|
|
2548 { |
|
|
2549 int ea = nargin_max; |
|
|
2550 if (nargin_max < 0) |
|
|
2551 ea = INT_MAX; |
|
|
2552 else |
|
|
2553 ea = nargin_max; |
|
|
2554 return ea; |
|
|
2555 } |
|
|
2556 |
|
578
|
2557 // User defined functions. |
|
494
|
2558 |
|
1161
|
2559 void |
|
|
2560 tree_function::install_nargin_and_nargout (void) |
|
|
2561 { |
|
|
2562 nargin_sr = sym_tab->lookup ("nargin", 1, 0); |
|
|
2563 nargout_sr = sym_tab->lookup ("nargout", 1, 0); |
|
|
2564 } |
|
|
2565 |
|
|
2566 void |
|
|
2567 tree_function::bind_nargin_and_nargout (int nargin, int nargout) |
|
|
2568 { |
|
|
2569 tree_constant *tmp; |
|
|
2570 |
|
|
2571 tmp = new tree_constant (nargin); |
|
|
2572 nargin_sr->define (tmp); |
|
|
2573 |
|
|
2574 tmp = new tree_constant (nargout); |
|
|
2575 nargout_sr->define (tmp); |
|
|
2576 } |
|
|
2577 |
|
578
|
2578 #if 0 |
|
494
|
2579 tree_function * |
|
578
|
2580 tree_function::define (tree statement_list *t) |
|
494
|
2581 { |
|
|
2582 cmd_list = t; |
|
|
2583 return this; |
|
|
2584 } |
|
578
|
2585 #endif |
|
494
|
2586 |
|
|
2587 tree_function * |
|
|
2588 tree_function::define_param_list (tree_parameter_list *t) |
|
|
2589 { |
|
|
2590 param_list = t; |
|
508
|
2591 |
|
529
|
2592 if (param_list) |
|
508
|
2593 { |
|
767
|
2594 num_named_args = param_list->length (); |
|
508
|
2595 curr_va_arg_number = num_named_args; |
|
|
2596 } |
|
494
|
2597 |
|
|
2598 return this; |
|
|
2599 } |
|
|
2600 |
|
|
2601 tree_function * |
|
|
2602 tree_function::define_ret_list (tree_parameter_list *t) |
|
|
2603 { |
|
|
2604 ret_list = t; |
|
723
|
2605 |
|
|
2606 if (ret_list && ret_list->takes_varargs ()) |
|
|
2607 vr_list = new tree_va_return_list; |
|
|
2608 |
|
494
|
2609 return this; |
|
|
2610 } |
|
|
2611 |
|
|
2612 void |
|
905
|
2613 tree_function::stash_fcn_file_name (void) |
|
494
|
2614 { |
|
|
2615 delete [] file_name; |
|
907
|
2616 file_name = fcn_name ? fcn_file_in_path (fcn_name) : 0; |
|
494
|
2617 } |
|
|
2618 |
|
|
2619 void |
|
|
2620 tree_function::mark_as_system_fcn_file (void) |
|
|
2621 { |
|
529
|
2622 if (file_name) |
|
494
|
2623 { |
|
|
2624 // We really should stash the whole path to the file we found, when we |
|
|
2625 // looked it up, to avoid possible race conditions... XXX FIXME XXX |
|
|
2626 // |
|
|
2627 // We probably also don't need to get the library directory every |
|
|
2628 // time, but since this function is only called when the function file |
|
|
2629 // is parsed, it probably doesn't matter that much. |
|
|
2630 |
|
|
2631 char *oct_lib = octave_lib_dir (); |
|
|
2632 int len = strlen (oct_lib); |
|
|
2633 |
|
|
2634 char *ff_name = fcn_file_in_path (file_name); |
|
|
2635 |
|
|
2636 if (strncmp (oct_lib, ff_name, len) == 0) |
|
|
2637 system_fcn_file = 1; |
|
|
2638 |
|
|
2639 delete [] ff_name; |
|
|
2640 } |
|
|
2641 else |
|
|
2642 system_fcn_file = 0; |
|
|
2643 } |
|
|
2644 |
|
|
2645 int |
|
|
2646 tree_function::takes_varargs (void) const |
|
|
2647 { |
|
529
|
2648 return (param_list && param_list->takes_varargs ()); |
|
494
|
2649 } |
|
|
2650 |
|
|
2651 tree_constant |
|
|
2652 tree_function::octave_va_arg (void) |
|
|
2653 { |
|
|
2654 tree_constant retval; |
|
|
2655 |
|
508
|
2656 if (curr_va_arg_number < num_args_passed) |
|
767
|
2657 retval = args_passed (curr_va_arg_number++); |
|
494
|
2658 else |
|
767
|
2659 ::error ("va_arg: error getting arg number %d -- only %d provided", |
|
|
2660 curr_va_arg_number + 1, num_args_passed); |
|
494
|
2661 |
|
|
2662 return retval; |
|
|
2663 } |
|
|
2664 |
|
922
|
2665 Octave_object |
|
|
2666 tree_function::octave_all_va_args (void) |
|
|
2667 { |
|
|
2668 Octave_object retval; |
|
|
2669 |
|
|
2670 retval.resize (num_args_passed - num_named_args); |
|
|
2671 |
|
|
2672 int k = 0; |
|
|
2673 for (int i = num_named_args; i < num_args_passed; i++) |
|
|
2674 retval(k++) = args_passed(i); |
|
|
2675 |
|
|
2676 return retval; |
|
|
2677 } |
|
|
2678 |
|
723
|
2679 int |
|
|
2680 tree_function::takes_var_return (void) const |
|
|
2681 { |
|
|
2682 return (ret_list && ret_list->takes_varargs ()); |
|
|
2683 } |
|
|
2684 |
|
|
2685 void |
|
|
2686 tree_function::octave_vr_val (const tree_constant& val) |
|
|
2687 { |
|
|
2688 assert (vr_list); |
|
|
2689 |
|
|
2690 vr_list->append (val); |
|
|
2691 } |
|
|
2692 |
|
494
|
2693 void |
|
|
2694 tree_function::stash_function_name (char *s) |
|
|
2695 { |
|
|
2696 delete [] fcn_name; |
|
|
2697 fcn_name = strsave (s); |
|
|
2698 } |
|
|
2699 |
|
|
2700 tree_constant |
|
|
2701 tree_function::eval (int print) |
|
|
2702 { |
|
|
2703 tree_constant retval; |
|
|
2704 |
|
529
|
2705 if (error_state || ! cmd_list) |
|
494
|
2706 return retval; |
|
|
2707 |
|
565
|
2708 Octave_object tmp_args; |
|
1031
|
2709 Octave_object tmp = eval (print, 0, tmp_args); |
|
500
|
2710 |
|
|
2711 if (! error_state && tmp.length () > 0) |
|
|
2712 retval = tmp(0); |
|
494
|
2713 |
|
|
2714 return retval; |
|
|
2715 } |
|
|
2716 |
|
|
2717 // For unwind protect. |
|
|
2718 |
|
|
2719 static void |
|
|
2720 pop_symbol_table_context (void *table) |
|
|
2721 { |
|
|
2722 symbol_table *tmp = (symbol_table *) table; |
|
|
2723 tmp->pop_context (); |
|
|
2724 } |
|
|
2725 |
|
|
2726 static void |
|
723
|
2727 delete_vr_list (void *list) |
|
|
2728 { |
|
|
2729 tree_va_return_list *tmp = (tree_va_return_list *) list; |
|
|
2730 tmp->clear (); |
|
|
2731 delete tmp; |
|
|
2732 } |
|
|
2733 |
|
|
2734 static void |
|
494
|
2735 clear_symbol_table (void *table) |
|
|
2736 { |
|
|
2737 symbol_table *tmp = (symbol_table *) table; |
|
|
2738 tmp->clear (); |
|
|
2739 } |
|
|
2740 |
|
500
|
2741 Octave_object |
|
506
|
2742 tree_function::eval (int print, int nargout, const Octave_object& args) |
|
494
|
2743 { |
|
500
|
2744 Octave_object retval; |
|
494
|
2745 |
|
|
2746 if (error_state) |
|
|
2747 return retval; |
|
|
2748 |
|
529
|
2749 if (! cmd_list) |
|
494
|
2750 return retval; |
|
|
2751 |
|
506
|
2752 int nargin = args.length (); |
|
|
2753 |
|
494
|
2754 begin_unwind_frame ("func_eval"); |
|
|
2755 |
|
|
2756 unwind_protect_int (call_depth); |
|
|
2757 call_depth++; |
|
|
2758 |
|
|
2759 if (call_depth > 1) |
|
|
2760 { |
|
|
2761 sym_tab->push_context (); |
|
|
2762 add_unwind_protect (pop_symbol_table_context, (void *) sym_tab); |
|
723
|
2763 |
|
|
2764 if (vr_list) |
|
|
2765 { |
|
|
2766 // Push new vr_list. |
|
|
2767 unwind_protect_ptr (vr_list); |
|
|
2768 vr_list = new tree_va_return_list; |
|
|
2769 |
|
|
2770 // Clear and delete the new one before restoring the old one. |
|
|
2771 add_unwind_protect (delete_vr_list, (void *) vr_list); |
|
|
2772 } |
|
494
|
2773 } |
|
|
2774 |
|
723
|
2775 if (vr_list) |
|
|
2776 vr_list->clear (); |
|
|
2777 |
|
494
|
2778 // Force symbols to be undefined again when this function exits. |
|
|
2779 |
|
|
2780 add_unwind_protect (clear_symbol_table, (void *) sym_tab); |
|
|
2781 |
|
|
2782 // Save old and set current symbol table context, for eval_undefined_error(). |
|
|
2783 |
|
|
2784 unwind_protect_ptr (curr_sym_tab); |
|
|
2785 curr_sym_tab = sym_tab; |
|
|
2786 |
|
|
2787 unwind_protect_ptr (curr_function); |
|
|
2788 curr_function = this; |
|
|
2789 |
|
500
|
2790 // unwind_protect_ptr (args_passed); |
|
494
|
2791 args_passed = args; |
|
|
2792 |
|
|
2793 unwind_protect_int (num_args_passed); |
|
|
2794 num_args_passed = nargin; |
|
|
2795 |
|
|
2796 unwind_protect_int (num_named_args); |
|
508
|
2797 unwind_protect_int (curr_va_arg_number); |
|
494
|
2798 |
|
529
|
2799 if (param_list && ! param_list->varargs_only ()) |
|
494
|
2800 { |
|
506
|
2801 param_list->define_from_arg_vector (args); |
|
494
|
2802 if (error_state) |
|
|
2803 goto abort; |
|
|
2804 } |
|
|
2805 |
|
|
2806 // The following code is in a separate scope to avoid warnings from |
|
|
2807 // G++ about `goto abort' crossing the initialization of some |
|
|
2808 // variables. |
|
|
2809 |
|
|
2810 { |
|
1161
|
2811 bind_nargin_and_nargout (nargin, nargout); |
|
494
|
2812 |
|
|
2813 // Evaluate the commands that make up the function. Always turn on |
|
|
2814 // printing for commands inside functions. Maybe this should be |
|
|
2815 // toggled by a user-leval variable? |
|
|
2816 |
|
|
2817 int pf = ! user_pref.silent_functions; |
|
|
2818 tree_constant last_computed_value = cmd_list->eval (pf); |
|
|
2819 |
|
|
2820 if (returning) |
|
|
2821 returning = 0; |
|
|
2822 |
|
1060
|
2823 if (breaking) |
|
|
2824 breaking--; |
|
|
2825 |
|
494
|
2826 if (error_state) |
|
|
2827 { |
|
|
2828 traceback_error (); |
|
|
2829 goto abort; |
|
|
2830 } |
|
|
2831 |
|
|
2832 // Copy return values out. |
|
|
2833 |
|
529
|
2834 if (ret_list) |
|
1093
|
2835 { |
|
|
2836 if (nargout > 0 && user_pref.define_all_return_values) |
|
|
2837 { |
|
|
2838 tree_constant tmp = builtin_any_variable ("default_return_value"); |
|
|
2839 if (tmp.is_defined ()) |
|
|
2840 ret_list->initialize_undefined_elements (tmp); |
|
|
2841 } |
|
|
2842 |
|
|
2843 retval = ret_list->convert_to_const_vector (vr_list); |
|
|
2844 } |
|
494
|
2845 else if (user_pref.return_last_computed_value) |
|
712
|
2846 retval(0) = last_computed_value; |
|
494
|
2847 } |
|
|
2848 |
|
|
2849 abort: |
|
|
2850 run_unwind_frame ("func_eval"); |
|
|
2851 |
|
|
2852 return retval; |
|
|
2853 } |
|
|
2854 |
|
|
2855 int |
|
|
2856 tree_function::max_expected_args (void) |
|
|
2857 { |
|
529
|
2858 if (param_list) |
|
494
|
2859 { |
|
|
2860 if (param_list->takes_varargs ()) |
|
|
2861 return -1; |
|
|
2862 else |
|
723
|
2863 return param_list->length (); |
|
494
|
2864 } |
|
|
2865 else |
|
|
2866 return 1; |
|
|
2867 } |
|
|
2868 |
|
|
2869 void |
|
|
2870 tree_function::traceback_error (void) |
|
|
2871 { |
|
|
2872 if (error_state >= 0) |
|
|
2873 error_state = -1; |
|
|
2874 |
|
529
|
2875 if (fcn_name) |
|
494
|
2876 { |
|
529
|
2877 if (file_name) |
|
494
|
2878 ::error ("called from `%s' in file `%s'", fcn_name, file_name); |
|
|
2879 else |
|
|
2880 ::error ("called from `%s'", fcn_name); |
|
|
2881 } |
|
|
2882 else |
|
|
2883 { |
|
529
|
2884 if (file_name) |
|
494
|
2885 ::error ("called from file `%s'", file_name); |
|
|
2886 else |
|
|
2887 ::error ("called from `?unknown?'"); |
|
|
2888 } |
|
|
2889 } |
|
|
2890 |
|
581
|
2891 void |
|
|
2892 tree_function::print_code (ostream& os) |
|
|
2893 { |
|
|
2894 print_code_reset (); |
|
|
2895 |
|
|
2896 print_code_indent (os); |
|
|
2897 |
|
|
2898 os << "function "; |
|
|
2899 |
|
|
2900 if (ret_list) |
|
|
2901 { |
|
|
2902 int len = ret_list->length (); |
|
|
2903 |
|
|
2904 if (len > 1) |
|
|
2905 os << "["; |
|
|
2906 |
|
|
2907 ret_list->print_code (os); |
|
|
2908 |
|
|
2909 if (len > 1) |
|
|
2910 os << "]"; |
|
|
2911 |
|
|
2912 os << " = "; |
|
|
2913 } |
|
|
2914 |
|
|
2915 os << (fcn_name ? fcn_name : "(null)") << " "; |
|
|
2916 |
|
|
2917 if (param_list) |
|
|
2918 { |
|
|
2919 int len = param_list->length (); |
|
|
2920 if (len > 0) |
|
|
2921 os << "("; |
|
|
2922 |
|
|
2923 param_list->print_code (os); |
|
|
2924 |
|
|
2925 if (len > 0) |
|
|
2926 { |
|
|
2927 os << ")"; |
|
|
2928 print_code_new_line (os); |
|
|
2929 } |
|
|
2930 } |
|
|
2931 else |
|
|
2932 { |
|
|
2933 os << "()"; |
|
|
2934 print_code_new_line (os); |
|
|
2935 } |
|
|
2936 |
|
|
2937 if (cmd_list) |
|
|
2938 { |
|
|
2939 increment_indent_level (); |
|
|
2940 cmd_list->print_code (os); |
|
|
2941 } |
|
|
2942 |
|
|
2943 os << "endfunction"; |
|
|
2944 |
|
|
2945 print_code_new_line (os); |
|
|
2946 } |
|
|
2947 |
|
712
|
2948 DEFUN ("va_arg", Fva_arg, Sva_arg, 0, 1, |
|
529
|
2949 "va_arg (): return next argument in a function that takes a\n\ |
|
581
|
2950 variable number of parameters") |
|
529
|
2951 { |
|
|
2952 Octave_object retval; |
|
|
2953 |
|
|
2954 int nargin = args.length (); |
|
|
2955 |
|
712
|
2956 if (nargin == 0) |
|
529
|
2957 { |
|
|
2958 if (curr_function) |
|
|
2959 { |
|
|
2960 if (curr_function->takes_varargs ()) |
|
|
2961 retval = curr_function->octave_va_arg (); |
|
|
2962 else |
|
|
2963 { |
|
749
|
2964 ::error ("va_arg only valid within function taking variable"); |
|
|
2965 ::error ("number of arguments"); |
|
529
|
2966 } |
|
|
2967 } |
|
|
2968 else |
|
749
|
2969 ::error ("va_arg only valid within function body"); |
|
529
|
2970 } |
|
|
2971 else |
|
|
2972 print_usage ("va_arg"); |
|
|
2973 |
|
|
2974 return retval; |
|
|
2975 } |
|
|
2976 |
|
712
|
2977 DEFUN ("va_start", Fva_start, Sva_start, 0, 0, |
|
529
|
2978 "va_start (): reset the pointer to the list of optional arguments\n\ |
|
|
2979 to the beginning") |
|
|
2980 { |
|
|
2981 Octave_object retval; |
|
|
2982 |
|
|
2983 int nargin = args.length (); |
|
|
2984 |
|
712
|
2985 if (nargin == 0) |
|
529
|
2986 { |
|
|
2987 if (curr_function) |
|
|
2988 { |
|
|
2989 if (curr_function->takes_varargs ()) |
|
|
2990 curr_function->octave_va_start (); |
|
|
2991 else |
|
|
2992 { |
|
749
|
2993 ::error ("va_start only valid within function taking variable"); |
|
|
2994 ::error ("number of arguments"); |
|
529
|
2995 } |
|
|
2996 } |
|
|
2997 else |
|
749
|
2998 ::error ("va_start only valid within function body"); |
|
529
|
2999 } |
|
|
3000 else |
|
|
3001 print_usage ("va_start"); |
|
|
3002 |
|
|
3003 return retval; |
|
|
3004 } |
|
|
3005 |
|
723
|
3006 DEFUN ("vr_val", Fvr_val, Svr_val, 1, 0, |
|
|
3007 "vr_val (X): append X to the list of optional return values for a |
|
|
3008 function that allows a variable number of return values") |
|
|
3009 { |
|
|
3010 Octave_object retval; |
|
|
3011 |
|
|
3012 int nargin = args.length (); |
|
|
3013 |
|
|
3014 if (nargin == 1) |
|
|
3015 { |
|
|
3016 if (curr_function) |
|
|
3017 { |
|
|
3018 if (curr_function->takes_var_return ()) |
|
|
3019 curr_function->octave_vr_val (args(0)); |
|
|
3020 else |
|
|
3021 { |
|
749
|
3022 ::error ("vr_val only valid within function declared to"); |
|
|
3023 ::error ("produce a variable number of values"); |
|
723
|
3024 } |
|
|
3025 } |
|
|
3026 else |
|
749
|
3027 ::error ("vr_val only valid within function body"); |
|
723
|
3028 } |
|
|
3029 else |
|
|
3030 print_usage ("vr_val"); |
|
|
3031 |
|
|
3032 return retval; |
|
|
3033 } |
|
|
3034 |
|
494
|
3035 /* |
|
|
3036 ;;; Local Variables: *** |
|
|
3037 ;;; mode: C++ *** |
|
|
3038 ;;; page-delimiter: "^/\\*" *** |
|
|
3039 ;;; End: *** |
|
|
3040 */ |
