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1 // help.cc -*- C++ -*- |
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2 /* |
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3 |
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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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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21 |
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22 */ |
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23 |
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240
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24 #ifdef HAVE_CONFIG_H |
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25 #include <config.h> |
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26 #endif |
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27 |
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28 #include <csignal> |
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29 #include <cstdlib> |
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30 #include <cstring> |
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31 |
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32 #include <iostream.h> |
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33 #include <strstream.h> |
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34 |
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35 #ifdef HAVE_UNISTD_H |
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36 #include <sys/types.h> |
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37 #include <unistd.h> |
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38 #endif |
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39 |
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40 #include <readline/tilde.h> |
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41 |
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42 #include "defun.h" |
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43 #include "dirfns.h" |
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44 #include "error.h" |
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45 #include "help.h" |
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46 #include "oct-obj.h" |
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47 #include "octave.h" |
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48 #include "pager.h" |
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49 #include "pathsearch.h" |
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529
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50 #include "sighandlers.h" |
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51 #include "symtab.h" |
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52 #include "tree-const.h" |
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53 #include "tree-expr.h" |
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54 #include "tree-expr.h" |
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55 #include "user-prefs.h" |
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242
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56 #include "utils.h" |
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57 #include "variables.h" |
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58 |
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59 static help_list operators[] = |
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60 { |
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61 { "!", |
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62 "Logical not operator. See also `~'.\n", }, |
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63 |
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64 { "!=", |
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65 "Logical not equals operator. See also `~' and `<>'.\n", }, |
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66 |
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67 { "\"", |
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68 "String delimiter.\n", }, |
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69 |
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70 { "#", |
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71 "Begin comment character. See also `%'.", }, |
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72 |
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73 { "%", |
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74 "Begin comment charcter. See also `#'.", }, |
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75 |
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76 { "&", |
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77 "Logical and operator. See also `&&'.", }, |
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78 |
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79 { "&&", |
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80 "Logical and operator. See also `&'.", }, |
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81 |
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82 { "'", |
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83 "Matrix transpose operator. For complex matrices, computes the\n\ |
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84 complex conjugate (Hermitian) transpose. See also `.''\n\ |
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85 \n\ |
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86 The single quote character may also be used to delimit strings, but\n\ |
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87 it is better to use the double quote character, since that is never\n\ |
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88 ambiguous", }, |
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89 |
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90 { "(", |
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91 "Array index or function argument delimiter.", }, |
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92 |
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93 { ")", |
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94 "Array index or function argument delimiter.", }, |
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95 |
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96 { "*", |
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97 "Multiplication operator. See also `.*'", }, |
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98 |
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99 { "**", |
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100 "Power operator. See also `^', `.**', and `.^'", }, |
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101 |
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102 { "+", |
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103 "Addition operator.", }, |
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104 |
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105 { "++", |
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106 "Increment operator. As in C, may be applied as a prefix or postfix operator.", }, |
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107 |
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108 { ",", |
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109 "Array index, function argument, or command separator.", }, |
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110 |
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111 { "-", |
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112 "Subtraction or unary negation operator.", }, |
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113 |
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114 { "--", |
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115 "Decrement operator. As in C, may be applied as a prefix or postfix operator.", }, |
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116 |
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117 { ".'", |
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118 "Matrix transpose operator. For complex matrices, computes the\n\ |
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119 transpose, *not* the complex conjugate transpose. See also `''.", }, |
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120 |
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121 { ".*", |
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122 "Element by element multiplication operator. See also `*'.", }, |
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123 |
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124 { ".**", |
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125 "Element by element power operator. See also `**', `^', and `.^'.", }, |
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126 |
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127 { "./", |
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128 "Element by element division operator. See also `/' and `\\'.", }, |
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129 |
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130 { ".^", |
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131 "Element by element power operator. See also `**', `^', and `.^'.", }, |
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132 |
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133 { "/", |
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134 "Right division. See also `\\' and `./'.", }, |
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135 |
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136 { ":", |
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137 "Select entire rows or columns of matrices.", }, |
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138 |
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139 { ";", |
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140 "Array row or command separator. See also `,'.", }, |
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141 |
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142 { "<", |
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143 "Less than operator.", }, |
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144 |
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145 { "<=", |
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146 "Less than or equals operator.", }, |
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147 |
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148 { "<>", |
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928
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149 "Logical not equals operator. See also `!=' and `~='.", }, |
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150 |
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151 { "=", |
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152 "Assignment operator.", }, |
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153 |
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154 { "==", |
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155 "Equality test operator.", }, |
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156 |
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157 { ">", |
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158 "Greater than operator.", }, |
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159 |
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160 { ">=", |
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161 "Greater than or equals operator.", }, |
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162 |
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163 { "[", |
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164 "Return list delimiter. See also `]'.", }, |
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165 |
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166 { "\\", |
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167 "Left division operator. See also `/' and `./'.", }, |
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168 |
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169 { "]", |
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170 "Return list delimiter. See also `['.", }, |
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171 |
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172 { "^", |
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173 "Power operator. See also `**', `.^', and `.**.'", }, |
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174 |
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175 { "|", |
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176 "Logical or operator. See also `||'.", }, |
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177 |
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178 { "||", |
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179 "Logical or operator. See also `|'.", }, |
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180 |
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181 { "~", |
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182 "Logical not operator. See also `!' and `~'.", }, |
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183 |
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184 { "~=", |
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185 "Logical not equals operator. See also `<>' and `!='.", }, |
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186 |
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529
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187 { 0, 0, }, |
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188 }; |
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189 |
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190 static help_list keywords[] = |
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191 { |
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192 { "all_va_args", |
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193 "Pass all unnamed arguments to another function call.", }, |
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194 |
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195 { "break", |
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196 "Exit the innermost enclosing while or for loop.", }, |
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197 |
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198 { "continue", |
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199 "Jump to the end of the innermost enclosing while or for loop.", }, |
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200 |
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201 { "else", |
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202 "Alternate action for an if block.", }, |
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203 |
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204 { "elseif", |
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205 "Alternate conditional test for an if block.", }, |
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206 |
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207 { "end", |
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208 "Mark the end of any for, if, while, or function block.", }, |
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209 |
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210 { "end_unwind_protect", |
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211 "Mark the end of an unwind_protect block.", }, |
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212 |
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213 { "endfor", |
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214 "Mark the end of a for loop.", }, |
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215 |
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216 { "endfunction", |
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217 "Mark the end of a function.", }, |
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218 |
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219 { "endif", |
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220 "Mark the end of an if block.", }, |
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221 |
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222 { "endwhile", |
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223 "Mark the end of a while loop.", }, |
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224 |
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225 { "for", |
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226 "Begin a for loop.", }, |
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227 |
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228 { "function", |
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229 "Begin a function body.", }, |
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230 |
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231 { "global", |
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232 "Declare variables to have global scope.", }, |
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233 |
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234 { "gplot", |
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235 "Produce 2-D plots using gnuplot-like command syntax.", }, |
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236 |
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237 { "gsplot", |
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238 "Produce 3-D plots using gnuplot-like command syntax.", }, |
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239 |
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240 { "if", |
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241 "Begin an if block.", }, |
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242 |
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243 { "return", |
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244 "Return from a function.", }, |
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245 |
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246 { "unwind_protect", |
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247 "Begin an unwind_protect block.", }, |
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248 |
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249 { "unwind_protect_cleanup", |
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250 "Begin the cleanup section of an unwind_protect block.", }, |
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251 |
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252 { "while", |
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253 "Begin a while loop.", }, |
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254 |
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255 { 0, 0, }, |
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256 }; |
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257 |
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258 // Return a copy of the operator or keyword names. |
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259 |
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260 char ** |
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261 names (help_list *lst, int& count) |
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262 { |
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263 count = 0; |
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264 help_list *ptr = lst; |
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265 while (ptr->name) |
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266 { |
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267 count++; |
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268 ptr++; |
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269 } |
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270 |
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271 if (count == 0) |
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272 return 0; |
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273 |
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274 char **name_list = new char * [count+1]; |
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275 |
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276 ptr = lst; |
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277 int i = 0; |
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278 while (ptr->name) |
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279 { |
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280 name_list[i++] = strsave (ptr->name); |
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281 ptr++; |
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282 } |
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283 |
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284 name_list[i] = 0; |
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285 return name_list; |
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286 } |
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287 |
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288 help_list * |
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289 operator_help (void) |
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290 { |
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291 return operators; |
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292 } |
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293 |
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294 help_list * |
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295 keyword_help (void) |
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296 { |
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297 return keywords; |
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298 } |
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299 |
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300 #define VERBOSE_HELP_MESSAGE \ |
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301 "\n\ |
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302 Additional help for builtin functions, operators, and variables\n\ |
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303 is available in the on-line version of the manual.\n\ |
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304 \n\ |
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305 Use the command `help -i <topic>' to search the manual index.\n" |
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306 |
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307 static void |
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308 additional_help_message (ostrstream& output_buf) |
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309 { |
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310 #ifdef USE_GNU_INFO |
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311 if (! user_pref.suppress_verbose_help_message) |
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312 output_buf << VERBOSE_HELP_MESSAGE; |
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313 #endif |
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314 } |
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315 |
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316 void |
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317 print_usage (const char *string, int just_usage) |
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318 { |
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319 ostrstream output_buf; |
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320 |
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321 symbol_record *sym_rec = global_sym_tab->lookup (string, 0, 0); |
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322 if (sym_rec) |
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323 { |
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324 char *h = sym_rec->help (); |
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325 if (h && *h) |
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326 { |
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327 output_buf << "\n*** " << string << ":\n\n" |
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328 << h << "\n"; |
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329 |
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330 if (! just_usage) |
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331 additional_help_message (output_buf); |
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332 output_buf << ends; |
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333 maybe_page_output (output_buf); |
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334 } |
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335 } |
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336 else |
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337 warning ("no usage message found for `%s'", string); |
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338 } |
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339 |
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529
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340 static void |
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542
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341 display_names_from_help_list (ostrstream& output_buf, help_list *list, |
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342 const char *desc) |
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529
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343 { |
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344 int count = 0; |
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345 char **symbols = names (list, count); |
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346 output_buf << "\n*** " << desc << ":\n\n"; |
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347 if (symbols && count > 0) |
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348 list_in_columns (output_buf, symbols); |
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349 delete [] symbols; |
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350 } |
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351 |
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352 static char * |
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353 print_symbol_type (ostrstream& output_buf, symbol_record *sym_rec, |
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354 char *name, int print) |
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355 { |
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356 char *retval = 0; |
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357 |
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358 if (sym_rec->is_user_function ()) |
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359 { |
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360 tree_fvc *defn = sym_rec->def (); |
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361 char *fn = defn->fcn_file_name (); |
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362 if (fn) |
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363 { |
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364 char *ff = fcn_file_in_path (fn); |
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365 ff = ff ? ff : fn; |
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366 |
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367 if (print) |
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368 output_buf << name |
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369 << " is the function defined from:\n" |
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370 << ff << "\n"; |
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371 else |
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372 retval = ff; |
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373 } |
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374 else |
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375 { |
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376 if (print) |
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377 output_buf << name << " is a user-defined function\n"; |
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378 else |
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379 retval = "user-defined function"; |
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380 } |
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381 } |
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382 else if (sym_rec->is_text_function ()) |
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383 { |
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384 if (print) |
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385 output_buf << name << " is a builtin text-function\n"; |
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386 else |
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387 retval = "builtin text-function"; |
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388 } |
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389 else if (sym_rec->is_builtin_function ()) |
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390 { |
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391 if (print) |
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392 output_buf << name << " is a builtin function\n"; |
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393 else |
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394 retval = "builtin function"; |
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395 } |
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396 else if (sym_rec->is_user_variable ()) |
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397 { |
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398 if (print) |
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399 output_buf << name << " is a user-defined variable\n"; |
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400 else |
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401 retval = "user-defined variable"; |
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402 } |
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403 else if (sym_rec->is_builtin_variable ()) |
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404 { |
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405 if (print) |
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406 output_buf << name << " is a builtin variable\n"; |
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407 else |
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408 retval = "builtin variable"; |
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409 } |
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410 else |
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411 { |
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412 if (print) |
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413 output_buf << "which: `" << name |
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414 << "' has unknown type\n"; |
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415 else |
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416 retval = "unknown type"; |
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417 } |
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418 |
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419 return retval; |
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420 } |
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421 |
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529
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422 static void |
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542
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423 display_symtab_names (ostrstream& output_buf, char **names, |
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424 int count, const char *desc) |
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425 { |
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426 output_buf << "\n*** " << desc << ":\n\n"; |
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427 if (names && count > 0) |
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428 list_in_columns (output_buf, names); |
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429 } |
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430 |
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431 static void |
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529
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432 simple_help (void) |
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433 { |
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434 ostrstream output_buf; |
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435 |
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542
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436 display_names_from_help_list (output_buf, operator_help (), |
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437 "operators"); |
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529
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438 |
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542
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439 display_names_from_help_list (output_buf, keyword_help (), |
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440 "reserved words"); |
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529
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441 |
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542
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442 #ifdef LIST_SYMBOLS |
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443 #undef LIST_SYMBOLS |
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444 #endif |
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445 #define LIST_SYMBOLS(type, msg) \ |
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446 do \ |
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447 { \ |
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448 int count; \ |
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867
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449 char **names = global_sym_tab->list (count, 0, 0, 1, type); \ |
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542
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450 display_symtab_names (output_buf, names, count, msg); \ |
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451 char **ptr = names; \ |
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452 while (*ptr) \ |
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453 delete [] *ptr++; \ |
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454 delete [] names; \ |
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455 } \ |
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456 while (0) |
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529
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457 |
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1358
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458 // XXX FIXME XXX -- is this distinction needed? |
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459 |
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542
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460 LIST_SYMBOLS (symbol_def::TEXT_FUNCTION, |
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461 "text functions (these names are also reserved)"); |
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529
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462 |
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542
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463 LIST_SYMBOLS (symbol_def::MAPPER_FUNCTION, "mapper functions"); |
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464 |
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465 LIST_SYMBOLS (symbol_def::BUILTIN_FUNCTION, "general functions"); |
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466 |
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467 LIST_SYMBOLS (symbol_def::BUILTIN_VARIABLE, "builtin variables"); |
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468 |
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1358
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469 // Also need to list variables and currently compiled functions from |
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470 // the symbol table, if there are any. |
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529
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471 |
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1358
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472 // Also need to search octave_path for script files. |
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529
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473 |
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679
|
474 char *path_elt = kpse_path_element (user_pref.loadpath); |
|
529
|
475 |
|
679
|
476 while (path_elt) |
|
529
|
477 { |
|
679
|
478 str_llist_type *elt_dirs = kpse_element_dirs (path_elt); |
|
|
479 |
|
|
480 str_llist_elt_type *dir; |
|
|
481 for (dir = *elt_dirs; dir; dir = STR_LLIST_NEXT (*dir)) |
|
529
|
482 { |
|
679
|
483 char *elt_dir = STR_LLIST (*dir); |
|
|
484 |
|
|
485 if (elt_dir) |
|
|
486 { |
|
|
487 int count; |
|
|
488 char **names = get_fcn_file_names (count, elt_dir, 0); |
|
|
489 |
|
|
490 output_buf << "\n*** function files in " |
|
|
491 << make_absolute (elt_dir, the_current_working_directory) |
|
|
492 << ":\n\n"; |
|
|
493 |
|
|
494 if (names && count > 0) |
|
|
495 list_in_columns (output_buf, names); |
|
|
496 |
|
|
497 delete [] names; |
|
|
498 } |
|
529
|
499 } |
|
1155
|
500 |
|
679
|
501 path_elt = kpse_path_element (0); |
|
529
|
502 } |
|
|
503 |
|
|
504 additional_help_message (output_buf); |
|
|
505 output_buf << ends; |
|
|
506 maybe_page_output (output_buf); |
|
|
507 } |
|
|
508 |
|
1140
|
509 #ifdef USE_GNU_INFO |
|
529
|
510 static int |
|
1295
|
511 try_info (const char *string) |
|
529
|
512 { |
|
|
513 int status = 0; |
|
|
514 |
|
1295
|
515 static char *cmd_str = 0; |
|
|
516 |
|
|
517 delete [] cmd_str; |
|
|
518 cmd_str = 0; |
|
|
519 |
|
|
520 ostrstream cmd_buf; |
|
|
521 |
|
|
522 cmd_buf << "info --file " << user_pref.info_file; |
|
|
523 |
|
529
|
524 char *directory_name = strsave (user_pref.info_file); |
|
1295
|
525 char *file = strrchr (directory_name, '/'); |
|
|
526 if (file) |
|
529
|
527 { |
|
1295
|
528 file++; |
|
|
529 *file = 0; |
|
|
530 cmd_buf << " --directory " << directory_name; |
|
529
|
531 } |
|
|
532 delete [] directory_name; |
|
|
533 |
|
1295
|
534 if (string) |
|
|
535 cmd_buf << " --index-search " << string; |
|
529
|
536 |
|
1295
|
537 cmd_buf << ends; |
|
529
|
538 |
|
1295
|
539 cmd_str = cmd_buf.str (); |
|
529
|
540 |
|
1295
|
541 volatile sig_handler *old_sigint_handler; |
|
1443
|
542 old_sigint_handler = octave_set_signal_handler (SIGINT, SIG_IGN); |
|
529
|
543 |
|
1295
|
544 status = system (cmd_str); |
|
529
|
545 |
|
1443
|
546 octave_set_signal_handler (SIGINT, old_sigint_handler); |
|
529
|
547 |
|
1295
|
548 if ((status & 0xff) == 0) |
|
|
549 status = (signed char) ((status & 0xff00) >> 8); |
|
|
550 else |
|
|
551 status = 127; |
|
529
|
552 |
|
|
553 return status; |
|
|
554 } |
|
1140
|
555 #endif |
|
|
556 |
|
|
557 static void |
|
|
558 help_from_info (int argc, char **argv) |
|
|
559 { |
|
|
560 #ifdef USE_GNU_INFO |
|
|
561 if (argc == 1) |
|
1295
|
562 try_info (0); |
|
1140
|
563 else |
|
|
564 { |
|
|
565 while (--argc > 0) |
|
|
566 { |
|
|
567 argv++; |
|
|
568 |
|
|
569 if (! *argv || ! **argv) |
|
|
570 continue; |
|
|
571 |
|
1295
|
572 int status = try_info (*argv); |
|
1140
|
573 |
|
1295
|
574 if (status) |
|
1140
|
575 { |
|
1295
|
576 if (status < 0) |
|
|
577 { |
|
|
578 message ("help", |
|
|
579 "sorry, `%s' is not indexed in the manual", |
|
|
580 *argv); |
|
|
581 sleep (2); |
|
|
582 } |
|
|
583 else |
|
|
584 { |
|
|
585 error ("help: unable to find info!"); |
|
|
586 break; |
|
|
587 } |
|
1140
|
588 } |
|
|
589 } |
|
|
590 } |
|
|
591 #else |
|
|
592 message (0, "sorry, help -i is not available in this version of Octave"); |
|
|
593 #endif |
|
|
594 } |
|
529
|
595 |
|
542
|
596 int |
|
|
597 help_from_list (ostrstream& output_buf, const help_list *list, |
|
|
598 const char *string, int usage) |
|
|
599 { |
|
|
600 char *name; |
|
|
601 while ((name = list->name) != 0) |
|
|
602 { |
|
|
603 if (strcmp (name, string) == 0) |
|
|
604 { |
|
|
605 if (usage) |
|
|
606 output_buf << "\nusage: "; |
|
|
607 else |
|
|
608 { |
|
|
609 output_buf << "\n*** " << string << ":\n\n"; |
|
|
610 } |
|
|
611 |
|
|
612 output_buf << list->help << "\n"; |
|
|
613 |
|
|
614 return 1; |
|
|
615 } |
|
|
616 list++; |
|
|
617 } |
|
|
618 return 0; |
|
|
619 } |
|
|
620 |
|
1140
|
621 static void |
|
|
622 builtin_help (int argc, char **argv) |
|
|
623 { |
|
|
624 ostrstream output_buf; |
|
|
625 |
|
|
626 help_list *op_help_list = operator_help (); |
|
|
627 help_list *kw_help_list = keyword_help (); |
|
|
628 |
|
|
629 while (--argc > 0) |
|
|
630 { |
|
|
631 argv++; |
|
|
632 |
|
|
633 if (! *argv || ! **argv) |
|
|
634 continue; |
|
|
635 |
|
|
636 if (help_from_list (output_buf, op_help_list, *argv, 0)) |
|
|
637 continue; |
|
|
638 |
|
|
639 if (help_from_list (output_buf, kw_help_list, *argv, 0)) |
|
|
640 continue; |
|
|
641 |
|
|
642 symbol_record *sym_rec = lookup_by_name (*argv, 0); |
|
|
643 |
|
|
644 if (sym_rec && sym_rec->is_defined ()) |
|
|
645 { |
|
|
646 char *h = sym_rec->help (); |
|
|
647 if (h && *h) |
|
|
648 { |
|
|
649 print_symbol_type (output_buf, sym_rec, *argv, 1); |
|
|
650 output_buf << "\n" << h << "\n"; |
|
|
651 continue; |
|
|
652 } |
|
|
653 } |
|
|
654 |
|
|
655 char *path = fcn_file_in_path (*argv); |
|
|
656 char *h = get_help_from_file (path); |
|
|
657 if (h && *h) |
|
|
658 { |
|
|
659 output_buf << *argv << " is the file:\n" |
|
|
660 << path << "\n\n" << h << "\n"; |
|
|
661 delete [] h; |
|
|
662 delete [] path; |
|
|
663 continue; |
|
|
664 } |
|
|
665 delete [] path; |
|
|
666 |
|
|
667 output_buf << "\nhelp: sorry, `" << *argv << "' is not documented\n"; |
|
|
668 } |
|
|
669 |
|
|
670 additional_help_message (output_buf); |
|
|
671 output_buf << ends; |
|
|
672 maybe_page_output (output_buf); |
|
|
673 } |
|
|
674 |
|
|
675 #ifdef USE_GNU_INFO |
|
529
|
676 DEFUN_TEXT ("help", Fhelp, Shelp, -1, 1, |
|
|
677 "help [-i] [topic ...]\n\ |
|
|
678 \n\ |
|
|
679 print cryptic yet witty messages") |
|
1140
|
680 #else |
|
|
681 DEFUN_TEXT ("help", Fhelp, Shelp, -1, 1, |
|
|
682 "help [topic ...]\n\ |
|
|
683 \n\ |
|
|
684 print cryptic yet witty messages") |
|
|
685 #endif |
|
529
|
686 { |
|
|
687 Octave_object retval; |
|
|
688 |
|
|
689 DEFINE_ARGV("help"); |
|
|
690 |
|
|
691 if (argc == 1) |
|
|
692 { |
|
|
693 simple_help (); |
|
|
694 } |
|
|
695 else |
|
|
696 { |
|
|
697 if (argv[1] && strcmp (argv[1], "-i") == 0) |
|
|
698 { |
|
|
699 argc--; |
|
|
700 argv++; |
|
|
701 |
|
1140
|
702 help_from_info (argc, argv); |
|
529
|
703 } |
|
|
704 else |
|
|
705 { |
|
1140
|
706 builtin_help (argc, argv); |
|
529
|
707 } |
|
|
708 } |
|
|
709 |
|
|
710 DELETE_ARGV; |
|
|
711 |
|
|
712 return retval; |
|
|
713 } |
|
|
714 |
|
581
|
715 DEFUN_TEXT ("type", Ftype, Stype, -1, 1, |
|
|
716 "type NAME ...]\n\ |
|
|
717 \n\ |
|
|
718 display the definition of each NAME that refers to a function") |
|
|
719 { |
|
|
720 Octave_object retval; |
|
|
721 |
|
|
722 DEFINE_ARGV("type"); |
|
|
723 |
|
|
724 if (argc > 1) |
|
|
725 { |
|
1358
|
726 // XXX FIXME XXX -- we should really use getopt () |
|
|
727 |
|
581
|
728 int quiet = 0; |
|
|
729 if (argv[1] && strcmp (argv[1], "-q") == 0) |
|
|
730 { |
|
|
731 quiet = 1; |
|
|
732 argc--; |
|
|
733 argv++; |
|
|
734 } |
|
|
735 |
|
|
736 ostrstream output_buf; |
|
|
737 |
|
|
738 while (--argc > 0) |
|
|
739 { |
|
|
740 argv++; |
|
|
741 |
|
|
742 if (! *argv || ! **argv) |
|
|
743 continue; |
|
|
744 |
|
1281
|
745 char *id = strsave (*argv); |
|
|
746 char *elts = 0; |
|
1288
|
747 if (id[strlen (id) - 1] != '.') |
|
1281
|
748 { |
|
1288
|
749 char *ptr = strchr (id, '.'); |
|
1281
|
750 if (ptr) |
|
1288
|
751 { |
|
|
752 *ptr = '\0'; |
|
|
753 elts = ptr + 1; |
|
|
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) |
|
|
766 output_buf << *argv << " is a user-defined function\n"; |
|
|
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 ()) |
|
|
775 output_buf << *argv << " is a builtin text-function\n"; |
|
|
776 else if (sym_rec->is_builtin_function ()) |
|
|
777 output_buf << *argv << " 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 |
|
|
785 tree_constant *tmp = (tree_constant *) defn; |
|
625
|
786 |
|
1281
|
787 int var_ok = 1; |
|
|
788 if (tmp && tmp->is_map ()) |
|
|
789 { |
|
|
790 if (elts && *elts) |
|
|
791 { |
|
1288
|
792 tree_constant ult = |
|
|
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 { |
|
|
804 output_buf << *argv; |
|
|
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 { |
|
|
812 if (elts && *elts) |
|
|
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 |
|
|
829 output_buf << "type: `" << *argv << "' has unknown type!\n"; |
|
|
830 } |
|
|
831 else |
|
|
832 output_buf << "type: `" << *argv << "' undefined\n"; |
|
1281
|
833 |
|
|
834 delete [] id; |
|
581
|
835 } |
|
|
836 |
|
|
837 output_buf << ends; |
|
|
838 |
|
|
839 if (nargout == 0) |
|
|
840 maybe_page_output (output_buf); |
|
|
841 else |
|
|
842 { |
|
|
843 char *s = output_buf.str (); |
|
|
844 retval = s; |
|
1288
|
845 delete [] s; |
|
581
|
846 } |
|
|
847 } |
|
|
848 else |
|
|
849 print_usage ("type"); |
|
|
850 |
|
|
851 DELETE_ARGV; |
|
|
852 |
|
|
853 return retval; |
|
|
854 } |
|
|
855 |
|
|
856 DEFUN_TEXT ("which", Fwhich, Swhich, -1, 1, |
|
|
857 "which NAME ...]\n\ |
|
|
858 \n\ |
|
|
859 display the type of each NAME. If NAME is defined from an function\n\ |
|
|
860 file, print the full name of the file.") |
|
|
861 { |
|
|
862 Octave_object retval; |
|
|
863 |
|
|
864 DEFINE_ARGV("which"); |
|
|
865 |
|
|
866 if (argc > 1) |
|
|
867 { |
|
|
868 if (nargout > 0) |
|
|
869 retval.resize (argc-1, Matrix ()); |
|
|
870 |
|
|
871 ostrstream output_buf; |
|
|
872 |
|
|
873 for (int i = 0; i < argc-1; i++) |
|
|
874 { |
|
|
875 argv++; |
|
|
876 |
|
|
877 if (! *argv || ! **argv) |
|
|
878 continue; |
|
|
879 |
|
962
|
880 symbol_record *sym_rec = lookup_by_name (*argv, 0); |
|
581
|
881 |
|
|
882 if (sym_rec) |
|
|
883 { |
|
742
|
884 int print = (nargout == 0); |
|
|
885 char *tmp = print_symbol_type (output_buf, sym_rec, |
|
|
886 *argv, print); |
|
|
887 if (! print) |
|
|
888 retval(i) = tmp; |
|
581
|
889 } |
|
|
890 else |
|
|
891 { |
|
|
892 if (nargout == 0) |
|
|
893 output_buf << "which: `" << *argv << "' is undefined\n"; |
|
|
894 else |
|
|
895 retval(i) = "undefined"; |
|
|
896 } |
|
|
897 } |
|
|
898 output_buf << ends; |
|
|
899 maybe_page_output (output_buf); |
|
|
900 } |
|
|
901 else |
|
|
902 print_usage ("which"); |
|
|
903 |
|
|
904 DELETE_ARGV; |
|
|
905 |
|
|
906 return retval; |
|
|
907 } |
|
|
908 |
|
1
|
909 /* |
|
|
910 ;;; Local Variables: *** |
|
|
911 ;;; mode: C++ *** |
|
|
912 ;;; page-delimiter: "^/\\*" *** |
|
|
913 ;;; End: *** |
|
|
914 */ |
