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1 /* |
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2 |
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3 Copyright (C) 1996 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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240
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23 #ifdef HAVE_CONFIG_H |
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1192
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24 #include <config.h> |
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25 #endif |
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26 |
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1343
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27 #include <csignal> |
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28 #include <cstdlib> |
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29 #include <cstring> |
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30 |
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1755
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31 #include <string> |
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32 |
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1350
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33 #include <iostream.h> |
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34 #include <strstream.h> |
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35 |
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36 #ifdef HAVE_UNISTD_H |
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37 #include <sys/types.h> |
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38 #include <unistd.h> |
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39 #endif |
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40 |
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41 #include "str-vec.h" |
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42 |
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1352
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43 #include "defun.h" |
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44 #include "dirfns.h" |
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45 #include "error.h" |
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46 #include "help.h" |
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1755
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47 #include "oct-obj.h" |
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1352
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48 #include "pager.h" |
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1466
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49 #include "pathsearch.h" |
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1755
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50 #include "pt-const.h" |
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51 #include "pt-exp.h" |
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529
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52 #include "sighandlers.h" |
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53 #include "symtab.h" |
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1755
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54 #include "toplev.h" |
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1588
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55 #include "unwind-prot.h" |
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56 #include "user-prefs.h" |
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242
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57 #include "utils.h" |
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58 #include "variables.h" |
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529
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59 |
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60 static help_list operators[] = |
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61 { |
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62 { "!", |
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63 "Logical not operator. See also `~'.\n", }, |
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64 |
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65 { "!=", |
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66 "Logical not equals operator. See also `~' and `<>'.\n", }, |
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67 |
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68 { "\"", |
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69 "String delimiter.\n", }, |
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70 |
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71 { "#", |
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928
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72 "Begin comment character. See also `%'.", }, |
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73 |
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74 { "%", |
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75 "Begin comment charcter. See also `#'.", }, |
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76 |
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77 { "&", |
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928
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78 "Logical and operator. See also `&&'.", }, |
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79 |
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80 { "&&", |
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81 "Logical and operator. See also `&'.", }, |
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82 |
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83 { "'", |
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84 "Matrix transpose operator. For complex matrices, computes the\n\ |
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85 complex conjugate (Hermitian) transpose. See also `.''\n\ |
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86 \n\ |
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87 The single quote character may also be used to delimit strings, but\n\ |
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88 it is better to use the double quote character, since that is never\n\ |
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89 ambiguous", }, |
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90 |
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91 { "(", |
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928
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92 "Array index or function argument delimiter.", }, |
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93 |
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94 { ")", |
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928
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95 "Array index or function argument delimiter.", }, |
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96 |
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97 { "*", |
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928
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98 "Multiplication operator. See also `.*'", }, |
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99 |
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100 { "**", |
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101 "Power operator. See also `^', `.**', and `.^'", }, |
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102 |
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103 { "+", |
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104 "Addition operator.", }, |
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105 |
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106 { "++", |
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107 "Increment operator. As in C, may be applied as a prefix or postfix operator.", }, |
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108 |
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109 { ",", |
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110 "Array index, function argument, or command separator.", }, |
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111 |
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112 { "-", |
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113 "Subtraction or unary negation operator.", }, |
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114 |
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115 { "--", |
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116 "Decrement operator. As in C, may be applied as a prefix or postfix operator.", }, |
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117 |
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118 { ".'", |
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119 "Matrix transpose operator. For complex matrices, computes the\n\ |
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120 transpose, *not* the complex conjugate transpose. See also `''.", }, |
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121 |
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122 { ".*", |
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123 "Element by element multiplication operator. See also `*'.", }, |
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124 |
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125 { ".**", |
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928
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126 "Element by element power operator. See also `**', `^', and `.^'.", }, |
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127 |
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128 { "./", |
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129 "Element by element division operator. See also `/' and `\\'.", }, |
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130 |
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131 { ".^", |
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928
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132 "Element by element power operator. See also `**', `^', and `.^'.", }, |
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133 |
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134 { "/", |
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135 "Right division. See also `\\' and `./'.", }, |
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136 |
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137 { ":", |
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928
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138 "Select entire rows or columns of matrices.", }, |
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139 |
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140 { ";", |
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141 "Array row or command separator. See also `,'.", }, |
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142 |
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143 { "<", |
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144 "Less than operator.", }, |
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145 |
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146 { "<=", |
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928
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147 "Less than or equals operator.", }, |
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1
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148 |
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149 { "<>", |
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928
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150 "Logical not equals operator. See also `!=' and `~='.", }, |
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151 |
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152 { "=", |
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153 "Assignment operator.", }, |
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154 |
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155 { "==", |
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156 "Equality test operator.", }, |
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157 |
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158 { ">", |
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159 "Greater than operator.", }, |
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160 |
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161 { ">=", |
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162 "Greater than or equals operator.", }, |
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163 |
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164 { "[", |
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165 "Return list delimiter. See also `]'.", }, |
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166 |
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167 { "\\", |
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168 "Left division operator. See also `/' and `./'.", }, |
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169 |
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170 { "]", |
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171 "Return list delimiter. See also `['.", }, |
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172 |
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173 { "^", |
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174 "Power operator. See also `**', `.^', and `.**.'", }, |
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175 |
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176 { "|", |
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177 "Logical or operator. See also `||'.", }, |
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178 |
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179 { "||", |
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180 "Logical or operator. See also `|'.", }, |
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181 |
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182 { "~", |
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928
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183 "Logical not operator. See also `!' and `~'.", }, |
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184 |
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185 { "~=", |
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928
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186 "Logical not equals operator. See also `<>' and `!='.", }, |
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187 |
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529
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188 { 0, 0, }, |
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189 }; |
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190 |
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191 static help_list keywords[] = |
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192 { |
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193 { "all_va_args", |
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194 "Pass all unnamed arguments to another function call.", }, |
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195 |
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196 { "break", |
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197 "Exit the innermost enclosing while or for loop.", }, |
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198 |
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199 { "catch", |
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200 "begin the cleanup part of a try-catch block", }, |
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201 |
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202 { "continue", |
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203 "Jump to the end of the innermost enclosing while or for loop.", }, |
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204 |
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205 { "else", |
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206 "Alternate action for an if block.", }, |
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207 |
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208 { "elseif", |
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209 "Alternate conditional test for an if block.", }, |
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210 |
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211 { "end", |
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212 "Mark the end of any for, if, while, or function block.", }, |
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213 |
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214 { "end_try_catch", |
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215 "Mark the end of an try-catch block.", }, |
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216 |
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217 { "end_unwind_protect", |
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218 "Mark the end of an unwind_protect block.", }, |
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219 |
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220 { "endfor", |
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221 "Mark the end of a for loop.", }, |
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222 |
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223 { "endfunction", |
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224 "Mark the end of a function.", }, |
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225 |
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226 { "endif", |
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227 "Mark the end of an if block.", }, |
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228 |
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229 { "endwhile", |
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230 "Mark the end of a while loop.", }, |
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231 |
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232 { "for", |
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233 "Begin a for loop.", }, |
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234 |
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235 { "function", |
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236 "Begin a function body.", }, |
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237 |
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238 { "global", |
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239 "Declare variables to have global scope.", }, |
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240 |
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241 { "gplot", |
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242 "Produce 2-D plots using gnuplot-like command syntax.", }, |
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243 |
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244 { "gsplot", |
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245 "Produce 3-D plots using gnuplot-like command syntax.", }, |
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246 |
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247 { "if", |
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248 "Begin an if block.", }, |
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249 |
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250 { "return", |
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251 "Return from a function.", }, |
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252 |
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253 { "try", |
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254 "Begin a try-catch block.", }, |
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255 |
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256 { "unwind_protect", |
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257 "Begin an unwind_protect block.", }, |
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258 |
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259 { "unwind_protect_cleanup", |
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260 "Begin the cleanup section of an unwind_protect block.", }, |
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261 |
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262 { "while", |
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263 "Begin a while loop.", }, |
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264 |
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529
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265 { 0, 0, }, |
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266 }; |
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267 |
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268 // Return a copy of the operator or keyword names. |
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269 |
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270 string_vector |
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271 names (help_list *lst, int& count) |
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272 { |
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273 string_vector retval; |
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274 |
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275 count = 0; |
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276 help_list *ptr = lst; |
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277 while (ptr->name) |
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278 { |
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279 count++; |
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280 ptr++; |
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281 } |
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282 |
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283 if (count > 0) |
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284 { |
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285 retval.resize (count); |
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286 |
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287 ptr = lst; |
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288 for (int i = 0; i < count; i++) |
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289 { |
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290 retval[i] = ptr->name; |
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291 ptr++; |
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292 } |
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293 } |
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294 |
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295 return retval; |
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296 } |
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297 |
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298 help_list * |
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299 operator_help (void) |
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300 { |
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301 return operators; |
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302 } |
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303 |
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304 help_list * |
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305 keyword_help (void) |
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306 { |
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307 return keywords; |
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308 } |
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309 |
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310 #define VERBOSE_HELP_MESSAGE \ |
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311 "\n\ |
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312 Additional help for builtin functions, operators, and variables\n\ |
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313 is available in the on-line version of the manual.\n\ |
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314 \n\ |
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315 Use the command `help -i <topic>' to search the manual index.\n" |
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316 |
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317 static void |
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318 additional_help_message (ostrstream& output_buf) |
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542
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319 { |
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320 #ifdef USE_GNU_INFO |
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321 if (! user_pref.suppress_verbose_help_message) |
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322 output_buf << VERBOSE_HELP_MESSAGE; |
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1140
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323 #endif |
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542
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324 } |
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325 |
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326 void |
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327 print_usage (const string& nm, int just_usage) |
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542
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328 { |
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329 ostrstream output_buf; |
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330 |
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331 symbol_record *sym_rec = global_sym_tab->lookup (nm, 0, 0); |
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542
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332 if (sym_rec) |
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333 { |
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334 string h = sym_rec->help (); |
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335 |
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336 if (h.length () > 0) |
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542
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337 { |
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338 output_buf << "\n*** " << nm << ":\n\n" |
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542
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339 << h << "\n"; |
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340 |
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1117
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341 if (! just_usage) |
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1118
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342 additional_help_message (output_buf); |
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542
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343 output_buf << ends; |
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344 maybe_page_output (output_buf); |
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345 } |
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346 } |
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347 else |
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348 warning ("no usage message found for `%s'", nm.c_str ()); |
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542
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349 } |
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350 |
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529
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351 static void |
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542
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352 display_names_from_help_list (ostrstream& output_buf, help_list *list, |
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353 const char *desc) |
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529
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354 { |
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355 int count = 0; |
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356 string_vector symbols = names (list, count); |
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357 if (! symbols.empty ()) |
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358 { |
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359 output_buf << "\n*** " << desc << ":\n\n"; |
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360 symbols.list_in_columns (output_buf); |
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361 } |
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529
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362 } |
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363 |
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364 static string |
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365 print_symbol_type (ostrstream& output_buf, symbol_record *sym_rec, |
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366 const string& name, int print) |
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742
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367 { |
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368 string retval; |
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369 |
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370 if (sym_rec->is_user_function ()) |
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371 { |
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372 tree_fvc *defn = sym_rec->def (); |
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1755
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373 |
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374 string fn = defn->fcn_file_name (); |
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375 |
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376 if (! fn.empty ()) |
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742
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377 { |
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378 string ff = fcn_file_in_path (fn); |
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379 |
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380 ff = ff.length () > 0 ? ff : fn; |
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742
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381 |
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382 if (print) |
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383 output_buf << name |
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384 << " is the function defined from:\n" |
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385 << ff << "\n"; |
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386 else |
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387 retval = ff; |
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388 } |
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389 else |
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390 { |
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391 if (print) |
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392 output_buf << name << " is a user-defined function\n"; |
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393 else |
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394 retval = "user-defined function"; |
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395 } |
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396 } |
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397 else if (sym_rec->is_text_function ()) |
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398 { |
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399 if (print) |
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400 output_buf << name << " is a builtin text-function\n"; |
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401 else |
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402 retval = "builtin text-function"; |
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403 } |
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404 else if (sym_rec->is_builtin_function ()) |
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405 { |
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406 if (print) |
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407 output_buf << name << " is a builtin function\n"; |
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408 else |
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409 retval = "builtin function"; |
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410 } |
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411 else if (sym_rec->is_user_variable ()) |
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412 { |
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413 if (print) |
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414 output_buf << name << " is a user-defined variable\n"; |
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415 else |
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416 retval = "user-defined variable"; |
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417 } |
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418 else if (sym_rec->is_builtin_variable ()) |
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419 { |
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420 if (print) |
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421 output_buf << name << " is a builtin variable\n"; |
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422 else |
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423 retval = "builtin variable"; |
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424 } |
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425 else |
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426 { |
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427 if (print) |
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428 output_buf << "which: `" << name |
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429 << "' has unknown type\n"; |
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430 else |
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431 retval = "unknown type"; |
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432 } |
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433 |
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434 return retval; |
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435 } |
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436 |
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529
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437 static void |
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1755
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438 display_symtab_names (ostrstream& output_buf, const string_vector& names, |
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439 int /* count */, const string& desc) |
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542
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440 { |
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1808
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441 if (! names.empty ()) |
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442 { |
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443 output_buf << "\n*** " << desc << ":\n\n"; |
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444 names.list_in_columns (output_buf); |
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445 } |
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542
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446 } |
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447 |
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448 static void |
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529
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449 simple_help (void) |
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450 { |
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451 ostrstream output_buf; |
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452 |
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542
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453 display_names_from_help_list (output_buf, operator_help (), |
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454 "operators"); |
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529
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455 |
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542
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456 display_names_from_help_list (output_buf, keyword_help (), |
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457 "reserved words"); |
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529
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458 |
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542
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459 #ifdef LIST_SYMBOLS |
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460 #undef LIST_SYMBOLS |
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461 #endif |
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462 #define LIST_SYMBOLS(type, msg) \ |
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463 do \ |
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464 { \ |
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465 int count; \ |
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1755
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466 string_vector names = global_sym_tab->list (count, 0, 0, 1, type); \ |
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542
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467 display_symtab_names (output_buf, names, count, msg); \ |
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468 } \ |
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469 while (0) |
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529
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470 |
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1358
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471 // XXX FIXME XXX -- is this distinction needed? |
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472 |
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542
|
473 LIST_SYMBOLS (symbol_def::TEXT_FUNCTION, |
|
|
474 "text functions (these names are also reserved)"); |
|
529
|
475 |
|
542
|
476 LIST_SYMBOLS (symbol_def::MAPPER_FUNCTION, "mapper functions"); |
|
|
477 |
|
|
478 LIST_SYMBOLS (symbol_def::BUILTIN_FUNCTION, "general functions"); |
|
|
479 |
|
|
480 LIST_SYMBOLS (symbol_def::BUILTIN_VARIABLE, "builtin variables"); |
|
|
481 |
|
1358
|
482 // Also need to list variables and currently compiled functions from |
|
|
483 // the symbol table, if there are any. |
|
529
|
484 |
|
1358
|
485 // Also need to search octave_path for script files. |
|
529
|
486 |
|
1787
|
487 dir_path p (user_pref.loadpath); |
|
529
|
488 |
|
1787
|
489 string_vector dirs = p.all_directories (); |
|
679
|
490 |
|
1787
|
491 int len = dirs.length (); |
|
679
|
492 |
|
1787
|
493 for (int i = 0; i < len; i++) |
|
|
494 { |
|
|
495 string_vector names = get_fcn_file_names (dirs[i]); |
|
679
|
496 |
|
1787
|
497 if (! names.empty ()) |
|
|
498 { |
|
|
499 output_buf << "\n*** function files in " |
|
|
500 << make_absolute (dirs[i], the_current_working_directory) |
|
|
501 << ":\n\n"; |
|
679
|
502 |
|
1808
|
503 names.list_in_columns (output_buf); |
|
529
|
504 } |
|
|
505 } |
|
|
506 |
|
|
507 additional_help_message (output_buf); |
|
|
508 output_buf << ends; |
|
|
509 maybe_page_output (output_buf); |
|
|
510 } |
|
|
511 |
|
1140
|
512 #ifdef USE_GNU_INFO |
|
529
|
513 static int |
|
1755
|
514 try_info (const string& nm) |
|
529
|
515 { |
|
|
516 int status = 0; |
|
|
517 |
|
1295
|
518 static char *cmd_str = 0; |
|
|
519 |
|
|
520 delete [] cmd_str; |
|
|
521 cmd_str = 0; |
|
|
522 |
|
|
523 ostrstream cmd_buf; |
|
|
524 |
|
1613
|
525 cmd_buf << user_pref.info_prog << " --file " << user_pref.info_file; |
|
1295
|
526 |
|
1755
|
527 string directory_name = user_pref.info_file; |
|
|
528 size_t pos = directory_name.rfind ('/'); |
|
|
529 |
|
|
530 if (pos != NPOS) |
|
529
|
531 { |
|
1755
|
532 directory_name.resize (pos + 1); |
|
1295
|
533 cmd_buf << " --directory " << directory_name; |
|
529
|
534 } |
|
|
535 |
|
1755
|
536 if (nm.length () > 0) |
|
|
537 cmd_buf << " --index-search " << nm; |
|
529
|
538 |
|
1295
|
539 cmd_buf << ends; |
|
529
|
540 |
|
1295
|
541 cmd_str = cmd_buf.str (); |
|
529
|
542 |
|
1295
|
543 volatile sig_handler *old_sigint_handler; |
|
1443
|
544 old_sigint_handler = octave_set_signal_handler (SIGINT, SIG_IGN); |
|
529
|
545 |
|
1295
|
546 status = system (cmd_str); |
|
529
|
547 |
|
1443
|
548 octave_set_signal_handler (SIGINT, old_sigint_handler); |
|
529
|
549 |
|
1295
|
550 if ((status & 0xff) == 0) |
|
|
551 status = (signed char) ((status & 0xff00) >> 8); |
|
|
552 else |
|
|
553 status = 127; |
|
529
|
554 |
|
|
555 return status; |
|
|
556 } |
|
1140
|
557 #endif |
|
|
558 |
|
|
559 static void |
|
1755
|
560 help_from_info (const string_vector& argv, int idx, int argc) |
|
1140
|
561 { |
|
|
562 #ifdef USE_GNU_INFO |
|
1755
|
563 if (idx == argc) |
|
|
564 try_info (string ()); |
|
1140
|
565 else |
|
|
566 { |
|
1755
|
567 for (int i = idx; i < argc; i++) |
|
1140
|
568 { |
|
1755
|
569 int status = try_info (argv[i]); |
|
1140
|
570 |
|
1295
|
571 if (status) |
|
1140
|
572 { |
|
1295
|
573 if (status < 0) |
|
|
574 { |
|
|
575 message ("help", |
|
|
576 "sorry, `%s' is not indexed in the manual", |
|
1755
|
577 argv[i].c_str ()); |
|
1295
|
578 sleep (2); |
|
|
579 } |
|
|
580 else |
|
|
581 { |
|
|
582 error ("help: unable to find info!"); |
|
|
583 break; |
|
|
584 } |
|
1140
|
585 } |
|
|
586 } |
|
|
587 } |
|
|
588 #else |
|
|
589 message (0, "sorry, help -i is not available in this version of Octave"); |
|
|
590 #endif |
|
|
591 } |
|
529
|
592 |
|
542
|
593 int |
|
|
594 help_from_list (ostrstream& output_buf, const help_list *list, |
|
1755
|
595 const string& nm, int usage) |
|
542
|
596 { |
|
|
597 char *name; |
|
|
598 while ((name = list->name) != 0) |
|
|
599 { |
|
1755
|
600 if (strcmp (name, nm.c_str ()) == 0) |
|
542
|
601 { |
|
|
602 if (usage) |
|
|
603 output_buf << "\nusage: "; |
|
|
604 else |
|
|
605 { |
|
1755
|
606 output_buf << "\n*** " << nm << ":\n\n"; |
|
542
|
607 } |
|
|
608 |
|
|
609 output_buf << list->help << "\n"; |
|
|
610 |
|
|
611 return 1; |
|
|
612 } |
|
|
613 list++; |
|
|
614 } |
|
|
615 return 0; |
|
|
616 } |
|
|
617 |
|
1140
|
618 static void |
|
1755
|
619 builtin_help (int argc, const string_vector& argv) |
|
1140
|
620 { |
|
|
621 ostrstream output_buf; |
|
|
622 |
|
|
623 help_list *op_help_list = operator_help (); |
|
|
624 help_list *kw_help_list = keyword_help (); |
|
|
625 |
|
1755
|
626 for (int i = 1; i < argc; i++) |
|
1140
|
627 { |
|
1755
|
628 if (help_from_list (output_buf, op_help_list, argv[i], 0)) |
|
1140
|
629 continue; |
|
|
630 |
|
1755
|
631 if (help_from_list (output_buf, kw_help_list, argv[i], 0)) |
|
1140
|
632 continue; |
|
|
633 |
|
1755
|
634 symbol_record *sym_rec = lookup_by_name (argv[i], 0); |
|
1140
|
635 |
|
|
636 if (sym_rec && sym_rec->is_defined ()) |
|
|
637 { |
|
1755
|
638 string h = sym_rec->help (); |
|
|
639 |
|
|
640 if (h.length () > 0) |
|
1140
|
641 { |
|
1755
|
642 print_symbol_type (output_buf, sym_rec, argv[i], 1); |
|
1140
|
643 output_buf << "\n" << h << "\n"; |
|
|
644 continue; |
|
|
645 } |
|
|
646 } |
|
|
647 |
|
1755
|
648 string path = fcn_file_in_path (argv[i]); |
|
|
649 |
|
|
650 string h = get_help_from_file (path); |
|
|
651 |
|
|
652 if (! h.empty ()) |
|
1140
|
653 { |
|
1755
|
654 output_buf << argv[i] << " is the file:\n" |
|
1140
|
655 << path << "\n\n" << h << "\n"; |
|
1755
|
656 |
|
1140
|
657 continue; |
|
|
658 } |
|
|
659 |
|
1755
|
660 output_buf << "\nhelp: sorry, `" << argv[i] << "' is not documented\n"; |
|
1140
|
661 } |
|
|
662 |
|
|
663 additional_help_message (output_buf); |
|
|
664 output_buf << ends; |
|
|
665 maybe_page_output (output_buf); |
|
|
666 } |
|
|
667 |
|
|
668 #ifdef USE_GNU_INFO |
|
1957
|
669 DEFUN_TEXT (help, args, , |
|
529
|
670 "help [-i] [topic ...]\n\ |
|
|
671 \n\ |
|
|
672 print cryptic yet witty messages") |
|
1140
|
673 #else |
|
1957
|
674 DEFUN_TEXT (help, args, , |
|
1140
|
675 "help [topic ...]\n\ |
|
|
676 \n\ |
|
|
677 print cryptic yet witty messages") |
|
|
678 #endif |
|
529
|
679 { |
|
2086
|
680 octave_value_list retval; |
|
529
|
681 |
|
1755
|
682 int argc = args.length () + 1; |
|
|
683 |
|
1968
|
684 string_vector argv = args.make_argv ("help"); |
|
1755
|
685 |
|
|
686 if (error_state) |
|
|
687 return retval; |
|
529
|
688 |
|
|
689 if (argc == 1) |
|
|
690 { |
|
|
691 simple_help (); |
|
|
692 } |
|
|
693 else |
|
|
694 { |
|
1755
|
695 if (argv[1] == "-i") |
|
529
|
696 { |
|
1755
|
697 help_from_info (argv, 2, argc); |
|
529
|
698 } |
|
|
699 else |
|
|
700 { |
|
1140
|
701 builtin_help (argc, argv); |
|
529
|
702 } |
|
|
703 } |
|
|
704 |
|
|
705 return retval; |
|
|
706 } |
|
|
707 |
|
1957
|
708 DEFUN_TEXT (type, args, nargout, |
|
581
|
709 "type NAME ...]\n\ |
|
|
710 \n\ |
|
|
711 display the definition of each NAME that refers to a function") |
|
|
712 { |
|
2086
|
713 octave_value_list retval; |
|
581
|
714 |
|
1588
|
715 begin_unwind_frame ("Ftype"); |
|
|
716 |
|
1951
|
717 unwind_protect_str (user_pref.ps4); |
|
|
718 user_pref.ps4 = ""; |
|
1588
|
719 |
|
1755
|
720 int argc = args.length () + 1; |
|
|
721 |
|
1968
|
722 string_vector argv = args.make_argv ("type"); |
|
1755
|
723 |
|
|
724 if (error_state) |
|
|
725 return retval; |
|
581
|
726 |
|
|
727 if (argc > 1) |
|
|
728 { |
|
1358
|
729 // XXX FIXME XXX -- we should really use getopt () |
|
|
730 |
|
581
|
731 int quiet = 0; |
|
1755
|
732 int idx = 1; |
|
|
733 if (argv[idx] == "-q") |
|
581
|
734 { |
|
|
735 quiet = 1; |
|
1755
|
736 idx++; |
|
581
|
737 } |
|
|
738 |
|
|
739 ostrstream output_buf; |
|
|
740 |
|
1755
|
741 for (int i = idx; i < argc; i++) |
|
581
|
742 { |
|
1755
|
743 string id = argv[i]; |
|
|
744 string elts; |
|
581
|
745 |
|
1755
|
746 if (id[id.length () - 1] != '.') |
|
1281
|
747 { |
|
1755
|
748 size_t pos = id.find ('.'); |
|
|
749 |
|
|
750 if (pos != NPOS) |
|
1288
|
751 { |
|
1889
|
752 elts = id.substr (pos+1); |
|
1755
|
753 id = id.substr (0, pos); |
|
1288
|
754 } |
|
1281
|
755 } |
|
|
756 |
|
|
757 symbol_record *sym_rec = lookup_by_name (id, 0); |
|
581
|
758 |
|
|
759 if (sym_rec) |
|
|
760 { |
|
|
761 if (sym_rec->is_user_function ()) |
|
|
762 { |
|
|
763 tree_fvc *defn = sym_rec->def (); |
|
|
764 |
|
|
765 if (nargout == 0 && ! quiet) |
|
1755
|
766 output_buf << argv[i] << " is a user-defined function\n"; |
|
581
|
767 |
|
|
768 defn->print_code (output_buf); |
|
|
769 } |
|
|
770 |
|
1358
|
771 // XXX FIXME XXX -- this code should be shared with |
|
|
772 // Fwhich. |
|
581
|
773 |
|
|
774 else if (sym_rec->is_text_function ()) |
|
1755
|
775 output_buf << argv[i] << " is a builtin text-function\n"; |
|
581
|
776 else if (sym_rec->is_builtin_function ()) |
|
1755
|
777 output_buf << argv[i] << " is a builtin function\n"; |
|
1281
|
778 else if (sym_rec->is_user_variable () |
|
|
779 || sym_rec->is_builtin_variable ()) |
|
625
|
780 { |
|
|
781 tree_fvc *defn = sym_rec->def (); |
|
|
782 |
|
1288
|
783 assert (defn && defn->is_constant ()); |
|
1281
|
784 |
|
2086
|
785 octave_value *tmp = (octave_value *) defn; |
|
625
|
786 |
|
1281
|
787 int var_ok = 1; |
|
|
788 if (tmp && tmp->is_map ()) |
|
|
789 { |
|
1755
|
790 if (! elts.empty ()) |
|
1281
|
791 { |
|
2086
|
792 octave_value ult = |
|
1288
|
793 tmp->lookup_map_element (elts, 0, 1); |
|
625
|
794 |
|
1281
|
795 if (! ult.is_defined ()) |
|
|
796 var_ok = 0; |
|
|
797 } |
|
|
798 } |
|
1288
|
799 |
|
1281
|
800 if (nargout == 0 && ! quiet) |
|
|
801 { |
|
1288
|
802 if (var_ok) |
|
|
803 { |
|
1755
|
804 output_buf << argv[i]; |
|
1288
|
805 if (sym_rec->is_user_variable ()) |
|
|
806 output_buf << " is a user-defined variable\n"; |
|
|
807 else |
|
|
808 output_buf << " is a built-in variable\n"; |
|
|
809 } |
|
1281
|
810 else |
|
1288
|
811 { |
|
1755
|
812 if (! elts.empty ()) |
|
1288
|
813 output_buf << "type: structure `" << id |
|
|
814 << "' has no member `" << elts << "'\n"; |
|
|
815 else |
|
|
816 output_buf << "type: `" << id |
|
|
817 << "' has unknown type!"; |
|
|
818 } |
|
1281
|
819 } |
|
|
820 if (! tmp->is_map ()) |
|
|
821 { |
|
|
822 tmp->print_code (output_buf); |
|
625
|
823 |
|
1281
|
824 if (nargout == 0) |
|
|
825 output_buf << "\n"; |
|
|
826 } |
|
625
|
827 } |
|
581
|
828 else |
|
1755
|
829 output_buf << "type: `" << argv[i] << "' has unknown type!\n"; |
|
581
|
830 } |
|
|
831 else |
|
1755
|
832 output_buf << "type: `" << argv[i] << "' undefined\n"; |
|
581
|
833 } |
|
|
834 |
|
|
835 output_buf << ends; |
|
|
836 |
|
|
837 if (nargout == 0) |
|
|
838 maybe_page_output (output_buf); |
|
|
839 else |
|
|
840 { |
|
|
841 char *s = output_buf.str (); |
|
|
842 retval = s; |
|
1288
|
843 delete [] s; |
|
581
|
844 } |
|
|
845 } |
|
|
846 else |
|
|
847 print_usage ("type"); |
|
|
848 |
|
1588
|
849 run_unwind_frame ("Ftype"); |
|
|
850 |
|
581
|
851 return retval; |
|
|
852 } |
|
|
853 |
|
1957
|
854 DEFUN_TEXT (which, args, nargout, |
|
1565
|
855 "which NAME ...\n\ |
|
581
|
856 \n\ |
|
|
857 display the type of each NAME. If NAME is defined from an function\n\ |
|
|
858 file, print the full name of the file.") |
|
|
859 { |
|
2086
|
860 octave_value_list retval; |
|
581
|
861 |
|
1755
|
862 int argc = args.length () + 1; |
|
|
863 |
|
1968
|
864 string_vector argv = args.make_argv ("which"); |
|
1755
|
865 |
|
|
866 if (error_state) |
|
|
867 return retval; |
|
581
|
868 |
|
|
869 if (argc > 1) |
|
|
870 { |
|
|
871 if (nargout > 0) |
|
|
872 retval.resize (argc-1, Matrix ()); |
|
|
873 |
|
|
874 ostrstream output_buf; |
|
|
875 |
|
1755
|
876 for (int i = 1; i < argc; i++) |
|
581
|
877 { |
|
1755
|
878 symbol_record *sym_rec = lookup_by_name (argv[i], 0); |
|
581
|
879 |
|
|
880 if (sym_rec) |
|
|
881 { |
|
742
|
882 int print = (nargout == 0); |
|
1755
|
883 string tmp = print_symbol_type (output_buf, sym_rec, |
|
|
884 argv[i], print); |
|
742
|
885 if (! print) |
|
|
886 retval(i) = tmp; |
|
581
|
887 } |
|
|
888 else |
|
|
889 { |
|
|
890 if (nargout == 0) |
|
1755
|
891 output_buf << "which: `" << argv[i] << "' is undefined\n"; |
|
581
|
892 else |
|
|
893 retval(i) = "undefined"; |
|
|
894 } |
|
|
895 } |
|
|
896 output_buf << ends; |
|
|
897 maybe_page_output (output_buf); |
|
|
898 } |
|
|
899 else |
|
|
900 print_usage ("which"); |
|
|
901 |
|
|
902 return retval; |
|
|
903 } |
|
|
904 |
|
1
|
905 /* |
|
|
906 ;;; Local Variables: *** |
|
|
907 ;;; mode: C++ *** |
|
|
908 ;;; End: *** |
|
|
909 */ |
