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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, 675 Mass Ave, Cambridge, MA 02139, USA. |
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21 |
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22 */ |
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23 |
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240
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24 #ifdef HAVE_CONFIG_H |
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25 #include "config.h" |
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26 #endif |
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27 |
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28 #include <signal.h> |
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29 #include <stdlib.h> |
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30 #include <iostream.h> |
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31 #include <strstream.h> |
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32 |
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33 #include "tree-expr.h" |
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34 #include "tree-const.h" |
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529
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35 #include "sighandlers.h" |
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36 #include "user-prefs.h" |
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37 #include "tree-expr.h" |
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38 #include "variables.h" |
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39 #include "oct-obj.h" |
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40 #include "symtab.h" |
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41 #include "octave.h" |
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42 #include "dirfns.h" |
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43 #include "pager.h" |
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44 #include "error.h" |
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242
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45 #include "utils.h" |
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46 #include "help.h" |
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529
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47 #include "defun.h" |
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48 |
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49 extern "C" |
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50 { |
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51 #include "info/info.h" |
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52 #include "info/dribble.h" |
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53 #include "info/terminal.h" |
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54 |
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55 extern int initialize_info_session (); |
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56 extern int index_entry_exists (); |
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57 extern int do_info_index_search (); |
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58 extern void finish_info_session (); |
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59 extern char *replace_in_documentation (); |
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60 |
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61 // XXX FIXME XXX |
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62 #undef __FUNCTION_DEF |
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63 #include <readline/tilde.h> |
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64 |
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65 #define boolean kpathsea_boolean |
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66 #define false kpathsea_false |
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67 #define true kpathsea_true |
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68 #include <kpathsea/pathsearch.h> |
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529
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69 } |
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70 |
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71 static help_list operators[] = |
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72 { |
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73 { "!", |
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74 "Logical not operator. See also `~'.\n", }, |
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75 |
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76 { "!=", |
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77 "Logical not equals operator. See also `~' and `<>'.\n", }, |
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78 |
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79 { "\"", |
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80 "String delimiter.\n", }, |
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81 |
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82 { "#", |
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83 "Begin comment character. See also `%'.", }, |
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84 |
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85 { "%", |
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86 "Begin comment charcter. See also `#'.", }, |
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87 |
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88 { "&", |
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89 "Logical and operator. See also `&&'.", }, |
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90 |
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91 { "&&", |
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92 "Logical and operator. See also `&'.", }, |
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93 |
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94 { "'", |
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95 "Matrix transpose operator. For complex matrices, computes the\n\ |
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96 complex conjugate (Hermitian) transpose. See also `.''\n\ |
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97 \n\ |
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98 The single quote character may also be used to delimit strings, but\n\ |
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99 it is better to use the double quote character, since that is never\n\ |
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100 ambiguous", }, |
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101 |
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102 { "(", |
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103 "Array index or function argument delimiter.", }, |
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104 |
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105 { ")", |
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106 "Array index or function argument delimiter.", }, |
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107 |
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108 { "*", |
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109 "Multiplication operator. See also `.*'", }, |
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110 |
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111 { "**", |
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112 "Power operator. See also `^', `.**', and `.^'", }, |
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113 |
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114 { "+", |
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115 "Addition operator.", }, |
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116 |
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117 { "++", |
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118 "Increment operator. As in C, may be applied as a prefix or postfix operator.", }, |
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119 |
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120 { ",", |
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121 "Array index, function argument, or command separator.", }, |
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122 |
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123 { "-", |
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124 "Subtraction or unary negation operator.", }, |
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125 |
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126 { "--", |
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127 "Decrement operator. As in C, may be applied as a prefix or postfix operator.", }, |
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128 |
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129 { ".'", |
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130 "Matrix transpose operator. For complex matrices, computes the\n\ |
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131 transpose, *not* the complex conjugate transpose. See also `''.", }, |
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132 |
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133 { ".*", |
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134 "Element by element multiplication operator. See also `*'.", }, |
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135 |
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136 { ".**", |
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137 "Element by element power operator. See also `**', `^', and `.^'.", }, |
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138 |
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139 { "./", |
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140 "Element by element division operator. See also `/' and `\\'.", }, |
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141 |
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142 { ".^", |
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143 "Element by element power operator. See also `**', `^', and `.^'.", }, |
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144 |
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145 { "/", |
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146 "Right division. See also `\\' and `./'.", }, |
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147 |
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148 { ":", |
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149 "Select entire rows or columns of matrices.", }, |
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150 |
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151 { ";", |
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152 "Array row or command separator. See also `,'.", }, |
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153 |
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154 { "<", |
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155 "Less than operator.", }, |
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156 |
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157 { "<=", |
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158 "Less than or equals operator.", }, |
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159 |
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160 { "<>", |
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161 "Logical not equals operator. See also `!=' and `~='.", }, |
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162 |
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163 { "=", |
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164 "Assignment operator.", }, |
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165 |
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166 { "==", |
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167 "Equality test operator.", }, |
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168 |
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169 { ">", |
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170 "Greater than operator.", }, |
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171 |
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172 { ">=", |
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173 "Greater than or equals operator.", }, |
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174 |
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175 { "[", |
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176 "Return list delimiter. See also `]'.", }, |
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177 |
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178 { "\\", |
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179 "Left division operator. See also `/' and `./'.", }, |
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180 |
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181 { "]", |
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182 "Return list delimiter. See also `['.", }, |
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183 |
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184 { "^", |
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185 "Power operator. See also `**', `.^', and `.**.'", }, |
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186 |
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187 { "|", |
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188 "Logical or operator. See also `||'.", }, |
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189 |
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190 { "||", |
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191 "Logical or operator. See also `|'.", }, |
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192 |
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193 { "~", |
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194 "Logical not operator. See also `!' and `~'.", }, |
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195 |
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196 { "~=", |
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197 "Logical not equals operator. See also `<>' and `!='.", }, |
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198 |
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199 { 0, 0, }, |
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200 }; |
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201 |
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202 static help_list keywords[] = |
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203 { |
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204 { "all_va_args", |
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205 "Pass all unnamed arguments to another function call.", }, |
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206 |
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207 { "break", |
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208 "Exit the innermost enclosing while or for loop.", }, |
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209 |
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210 { "continue", |
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211 "Jump to the end of the innermost enclosing while or for loop.", }, |
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212 |
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213 { "else", |
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214 "Alternate action for an if block.", }, |
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215 |
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216 { "elseif", |
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217 "Alternate conditional test for an if block.", }, |
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218 |
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219 { "end", |
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220 "Mark the end of any for, if, while, or function block.", }, |
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221 |
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222 { "end_unwind_protect", |
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223 "Mark the end of an unwind_protect block.", }, |
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224 |
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225 { "endfor", |
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226 "Mark the end of a for loop.", }, |
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227 |
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228 { "endfunction", |
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229 "Mark the end of a function.", }, |
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230 |
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231 { "endif", |
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232 "Mark the end of an if block.", }, |
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233 |
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234 { "endwhile", |
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235 "Mark the end of a while loop.", }, |
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236 |
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237 { "for", |
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238 "Begin a for loop.", }, |
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239 |
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240 { "function", |
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241 "Begin a function body.", }, |
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242 |
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243 { "global", |
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244 "Declare variables to have global scope.", }, |
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245 |
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246 { "gplot", |
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247 "Produce 2-D plots using gnuplot-like command syntax.", }, |
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248 |
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249 { "gsplot", |
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250 "Produce 3-D plots using gnuplot-like command syntax.", }, |
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251 |
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252 { "if", |
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253 "Begin an if block.", }, |
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254 |
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255 { "return", |
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256 "Return from a function.", }, |
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257 |
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258 { "unwind_protect", |
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259 "Begin an unwind_protect block.", }, |
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260 |
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261 { "unwind_protect_cleanup", |
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262 "Begin the cleanup section of an unwind_protect block.", }, |
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263 |
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264 { "while", |
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265 "Begin a while loop.", }, |
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266 |
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267 { 0, 0, }, |
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268 }; |
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269 |
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270 // Return a copy of the operator or keyword names. |
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271 |
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272 char ** |
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273 names (help_list *lst, int& count) |
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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 return 0; |
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285 |
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286 char **name_list = new char * [count+1]; |
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287 |
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288 ptr = lst; |
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289 int i = 0; |
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290 while (ptr->name) |
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291 { |
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292 name_list[i++] = strsave (ptr->name); |
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293 ptr++; |
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294 } |
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295 |
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296 name_list[i] = 0; |
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297 return name_list; |
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298 } |
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299 |
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300 help_list * |
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301 operator_help (void) |
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302 { |
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303 return operators; |
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304 } |
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305 |
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306 help_list * |
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307 keyword_help (void) |
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308 { |
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309 return keywords; |
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310 } |
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311 |
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312 void |
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313 additional_help_message (ostrstream& output_buf) |
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314 { |
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315 output_buf |
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316 << "\n" |
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317 << "Additional help for builtin functions, operators, and variables\n" |
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318 << "is available in the on-line version of the manual.\n" |
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319 << "\n" |
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320 << "Use the command `help -i <topic>' to search the manual index.\n"; |
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321 } |
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322 |
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323 void |
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324 print_usage (const char *string, int just_usage) |
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325 { |
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326 ostrstream output_buf; |
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327 |
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328 symbol_record *sym_rec = global_sym_tab->lookup (string, 0, 0); |
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329 if (sym_rec) |
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330 { |
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331 char *h = sym_rec->help (); |
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332 if (h && *h) |
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333 { |
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334 output_buf << "\n*** " << string << ":\n\n" |
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335 << h << "\n"; |
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336 |
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337 if (! just_usage) |
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338 additional_help_message (output_buf); |
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339 output_buf << ends; |
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340 maybe_page_output (output_buf); |
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341 } |
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342 } |
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343 else |
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344 warning ("no usage message found for `%s'", string); |
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345 } |
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346 |
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347 static void |
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542
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348 display_names_from_help_list (ostrstream& output_buf, help_list *list, |
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349 const char *desc) |
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529
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350 { |
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351 int count = 0; |
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352 char **symbols = names (list, count); |
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353 output_buf << "\n*** " << desc << ":\n\n"; |
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354 if (symbols && count > 0) |
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355 list_in_columns (output_buf, symbols); |
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356 delete [] symbols; |
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357 } |
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358 |
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359 static char * |
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360 print_symbol_type (ostrstream& output_buf, symbol_record *sym_rec, |
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361 char *name, int print) |
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362 { |
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363 char *retval = 0; |
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364 |
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365 if (sym_rec->is_user_function ()) |
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366 { |
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367 tree_fvc *defn = sym_rec->def (); |
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368 char *fn = defn->fcn_file_name (); |
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369 if (fn) |
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370 { |
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371 char *ff = fcn_file_in_path (fn); |
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372 ff = ff ? ff : fn; |
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373 |
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374 if (print) |
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375 output_buf << name |
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376 << " is the function defined from:\n" |
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377 << ff << "\n"; |
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378 else |
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379 retval = ff; |
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380 } |
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381 else |
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382 { |
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383 if (print) |
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384 output_buf << name << " is a user-defined function\n"; |
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385 else |
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386 retval = "user-defined function"; |
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387 } |
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388 } |
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389 else if (sym_rec->is_text_function ()) |
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390 { |
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391 if (print) |
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392 output_buf << name << " is a builtin text-function\n"; |
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393 else |
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394 retval = "builtin text-function"; |
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395 } |
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396 else if (sym_rec->is_builtin_function ()) |
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397 { |
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398 if (print) |
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399 output_buf << name << " is a builtin function\n"; |
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400 else |
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401 retval = "builtin function"; |
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402 } |
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403 else if (sym_rec->is_user_variable ()) |
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404 { |
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405 if (print) |
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406 output_buf << name << " is a user-defined variable\n"; |
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407 else |
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408 retval = "user-defined variable"; |
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409 } |
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410 else if (sym_rec->is_builtin_variable ()) |
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411 { |
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412 if (print) |
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413 output_buf << name << " is a builtin variable\n"; |
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414 else |
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415 retval = "builtin variable"; |
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416 } |
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417 else |
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418 { |
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419 if (print) |
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420 output_buf << "which: `" << name |
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421 << "' has unknown type\n"; |
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422 else |
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423 retval = "unknown type"; |
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424 } |
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425 |
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426 return retval; |
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427 } |
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428 |
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529
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429 static void |
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542
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430 display_symtab_names (ostrstream& output_buf, char **names, |
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431 int count, const char *desc) |
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432 { |
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433 output_buf << "\n*** " << desc << ":\n\n"; |
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434 if (names && count > 0) |
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435 list_in_columns (output_buf, names); |
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436 } |
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437 |
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438 static void |
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529
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439 simple_help (void) |
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440 { |
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441 ostrstream output_buf; |
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442 |
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542
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443 display_names_from_help_list (output_buf, operator_help (), |
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444 "operators"); |
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529
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445 |
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542
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446 display_names_from_help_list (output_buf, keyword_help (), |
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447 "reserved words"); |
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529
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448 |
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542
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449 #ifdef LIST_SYMBOLS |
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450 #undef LIST_SYMBOLS |
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451 #endif |
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452 #define LIST_SYMBOLS(type, msg) \ |
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453 do \ |
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454 { \ |
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455 int count; \ |
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867
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456 char **names = global_sym_tab->list (count, 0, 0, 1, type); \ |
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542
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457 display_symtab_names (output_buf, names, count, msg); \ |
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458 char **ptr = names; \ |
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459 while (*ptr) \ |
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460 delete [] *ptr++; \ |
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461 delete [] names; \ |
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462 } \ |
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463 while (0) |
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529
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464 |
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542
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465 // XXX FIXME XXX -- is this distinction needed? |
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466 LIST_SYMBOLS (symbol_def::TEXT_FUNCTION, |
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467 "text functions (these names are also reserved)"); |
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529
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468 |
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542
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469 LIST_SYMBOLS (symbol_def::MAPPER_FUNCTION, "mapper functions"); |
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470 |
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471 LIST_SYMBOLS (symbol_def::BUILTIN_FUNCTION, "general functions"); |
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472 |
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473 LIST_SYMBOLS (symbol_def::BUILTIN_VARIABLE, "builtin variables"); |
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474 |
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529
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475 // Also need to list variables and currently compiled functions from |
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476 // the symbol table, if there are any. |
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477 |
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478 // Also need to search octave_path for script files. |
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479 |
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679
|
480 char *path_elt = kpse_path_element (user_pref.loadpath); |
|
529
|
481 |
|
679
|
482 while (path_elt) |
|
529
|
483 { |
|
679
|
484 str_llist_type *elt_dirs = kpse_element_dirs (path_elt); |
|
|
485 |
|
|
486 str_llist_elt_type *dir; |
|
|
487 for (dir = *elt_dirs; dir; dir = STR_LLIST_NEXT (*dir)) |
|
529
|
488 { |
|
679
|
489 char *elt_dir = STR_LLIST (*dir); |
|
|
490 |
|
|
491 if (elt_dir) |
|
|
492 { |
|
|
493 int count; |
|
|
494 char **names = get_fcn_file_names (count, elt_dir, 0); |
|
|
495 |
|
|
496 output_buf << "\n*** function files in " |
|
|
497 << make_absolute (elt_dir, the_current_working_directory) |
|
|
498 << ":\n\n"; |
|
|
499 |
|
|
500 if (names && count > 0) |
|
|
501 list_in_columns (output_buf, names); |
|
|
502 |
|
|
503 delete [] names; |
|
|
504 } |
|
529
|
505 } |
|
679
|
506 path_elt = kpse_path_element (0); |
|
529
|
507 } |
|
|
508 |
|
|
509 additional_help_message (output_buf); |
|
|
510 output_buf << ends; |
|
|
511 maybe_page_output (output_buf); |
|
|
512 } |
|
|
513 |
|
|
514 static int |
|
|
515 try_info (const char *string, int force = 0) |
|
|
516 { |
|
|
517 int status = 0; |
|
|
518 |
|
|
519 char *directory_name = strsave (user_pref.info_file); |
|
|
520 char *temp = filename_non_directory (directory_name); |
|
|
521 |
|
|
522 if (temp != directory_name) |
|
|
523 { |
|
|
524 *temp = 0; |
|
|
525 info_add_path (directory_name, INFOPATH_PREPEND); |
|
|
526 } |
|
|
527 |
|
|
528 delete [] directory_name; |
|
|
529 |
|
|
530 NODE *initial_node = info_get_node (user_pref.info_file, 0); |
|
|
531 |
|
|
532 if (! initial_node) |
|
|
533 { |
|
|
534 warning ("can't find info file!\n"); |
|
|
535 status = -1; |
|
|
536 } |
|
|
537 else |
|
|
538 { |
|
|
539 status = initialize_info_session (initial_node, 0); |
|
|
540 |
|
|
541 if (status == 0 && (force || index_entry_exists (windows, string))) |
|
|
542 { |
|
|
543 terminal_clear_screen (); |
|
|
544 |
|
|
545 terminal_prep_terminal (); |
|
|
546 |
|
|
547 display_update_display (windows); |
|
|
548 |
|
|
549 info_last_executed_command = 0; |
|
|
550 |
|
|
551 if (! force) |
|
|
552 do_info_index_search (windows, 0, string); |
|
|
553 |
|
|
554 char *format = replace_in_documentation |
|
|
555 ("Type \"\\[quit]\" to quit, \"\\[get-help-window]\" for help."); |
|
|
556 |
|
|
557 window_message_in_echo_area (format); |
|
|
558 |
|
|
559 info_read_and_dispatch (); |
|
|
560 |
|
|
561 terminal_goto_xy (0, screenheight - 1); |
|
|
562 |
|
|
563 terminal_clear_to_eol (); |
|
|
564 |
|
|
565 terminal_unprep_terminal (); |
|
|
566 |
|
|
567 status = 1; |
|
|
568 } |
|
|
569 |
|
|
570 finish_info_session (initial_node, 0); |
|
|
571 } |
|
|
572 |
|
|
573 return status; |
|
|
574 } |
|
|
575 |
|
542
|
576 int |
|
|
577 help_from_list (ostrstream& output_buf, const help_list *list, |
|
|
578 const char *string, int usage) |
|
|
579 { |
|
|
580 char *name; |
|
|
581 while ((name = list->name) != 0) |
|
|
582 { |
|
|
583 if (strcmp (name, string) == 0) |
|
|
584 { |
|
|
585 if (usage) |
|
|
586 output_buf << "\nusage: "; |
|
|
587 else |
|
|
588 { |
|
|
589 output_buf << "\n*** " << string << ":\n\n"; |
|
|
590 } |
|
|
591 |
|
|
592 output_buf << list->help << "\n"; |
|
|
593 |
|
|
594 return 1; |
|
|
595 } |
|
|
596 list++; |
|
|
597 } |
|
|
598 return 0; |
|
|
599 } |
|
|
600 |
|
529
|
601 DEFUN_TEXT ("help", Fhelp, Shelp, -1, 1, |
|
|
602 "help [-i] [topic ...]\n\ |
|
|
603 \n\ |
|
|
604 print cryptic yet witty messages") |
|
|
605 { |
|
|
606 Octave_object retval; |
|
|
607 |
|
|
608 DEFINE_ARGV("help"); |
|
|
609 |
|
|
610 if (argc == 1) |
|
|
611 { |
|
|
612 simple_help (); |
|
|
613 } |
|
|
614 else |
|
|
615 { |
|
|
616 if (argv[1] && strcmp (argv[1], "-i") == 0) |
|
|
617 { |
|
|
618 argc--; |
|
|
619 argv++; |
|
|
620 |
|
|
621 if (argc == 1) |
|
|
622 { |
|
|
623 volatile sig_handler *old_sigint_handler; |
|
654
|
624 old_sigint_handler = signal (SIGINT, SIG_IGN); |
|
529
|
625 |
|
|
626 try_info (0, 1); |
|
|
627 |
|
|
628 signal (SIGINT, old_sigint_handler); |
|
|
629 } |
|
|
630 else |
|
|
631 { |
|
|
632 while (--argc > 0) |
|
|
633 { |
|
|
634 argv++; |
|
|
635 |
|
|
636 if (! *argv || ! **argv) |
|
|
637 continue; |
|
|
638 |
|
|
639 volatile sig_handler *old_sigint_handler; |
|
|
640 old_sigint_handler = signal (SIGINT, SIG_IGN); |
|
|
641 |
|
|
642 if (! try_info (*argv)) |
|
|
643 { |
|
|
644 message ("help", |
|
|
645 "sorry, `%s' is not indexed in the manual", |
|
|
646 *argv); |
|
|
647 sleep (2); |
|
|
648 } |
|
|
649 |
|
|
650 signal (SIGINT, old_sigint_handler); |
|
|
651 } |
|
|
652 } |
|
|
653 } |
|
|
654 else |
|
|
655 { |
|
|
656 ostrstream output_buf; |
|
|
657 |
|
|
658 help_list *op_help_list = operator_help (); |
|
|
659 help_list *kw_help_list = keyword_help (); |
|
|
660 |
|
|
661 while (--argc > 0) |
|
|
662 { |
|
|
663 argv++; |
|
|
664 |
|
|
665 if (! *argv || ! **argv) |
|
|
666 continue; |
|
|
667 |
|
|
668 if (help_from_list (output_buf, op_help_list, *argv, 0)) |
|
|
669 continue; |
|
|
670 |
|
|
671 if (help_from_list (output_buf, kw_help_list, *argv, 0)) |
|
|
672 continue; |
|
|
673 |
|
962
|
674 symbol_record *sym_rec = lookup_by_name (*argv, 0); |
|
581
|
675 |
|
991
|
676 if (sym_rec && sym_rec->is_defined ()) |
|
529
|
677 { |
|
|
678 char *h = sym_rec->help (); |
|
|
679 if (h && *h) |
|
|
680 { |
|
742
|
681 print_symbol_type (output_buf, sym_rec, *argv, 1); |
|
|
682 output_buf << "\n" << h << "\n"; |
|
529
|
683 continue; |
|
|
684 } |
|
|
685 } |
|
|
686 |
|
993
|
687 char *path = fcn_file_in_path (*argv); |
|
|
688 char *h = get_help_from_file (path); |
|
991
|
689 if (h && *h) |
|
|
690 { |
|
993
|
691 output_buf << *argv << " is the file:\n" |
|
|
692 << path << "\n\n" << h << "\n"; |
|
991
|
693 delete [] h; |
|
993
|
694 delete [] path; |
|
991
|
695 continue; |
|
|
696 } |
|
993
|
697 delete [] path; |
|
991
|
698 |
|
529
|
699 output_buf << "\nhelp: sorry, `" << *argv |
|
581
|
700 << "' is not documented\n"; |
|
529
|
701 } |
|
|
702 |
|
|
703 additional_help_message (output_buf); |
|
|
704 output_buf << ends; |
|
|
705 maybe_page_output (output_buf); |
|
|
706 } |
|
|
707 } |
|
|
708 |
|
|
709 DELETE_ARGV; |
|
|
710 |
|
|
711 return retval; |
|
|
712 } |
|
|
713 |
|
581
|
714 DEFUN_TEXT ("type", Ftype, Stype, -1, 1, |
|
|
715 "type NAME ...]\n\ |
|
|
716 \n\ |
|
|
717 display the definition of each NAME that refers to a function") |
|
|
718 { |
|
|
719 Octave_object retval; |
|
|
720 |
|
|
721 DEFINE_ARGV("type"); |
|
|
722 |
|
|
723 if (argc > 1) |
|
|
724 { |
|
|
725 // XXX FIXME XXX -- we should really use getopt () |
|
|
726 int quiet = 0; |
|
|
727 if (argv[1] && strcmp (argv[1], "-q") == 0) |
|
|
728 { |
|
|
729 quiet = 1; |
|
|
730 argc--; |
|
|
731 argv++; |
|
|
732 } |
|
|
733 |
|
|
734 ostrstream output_buf; |
|
|
735 |
|
|
736 while (--argc > 0) |
|
|
737 { |
|
|
738 argv++; |
|
|
739 |
|
|
740 if (! *argv || ! **argv) |
|
|
741 continue; |
|
|
742 |
|
962
|
743 symbol_record *sym_rec = lookup_by_name (*argv, 0); |
|
581
|
744 |
|
|
745 if (sym_rec) |
|
|
746 { |
|
|
747 if (sym_rec->is_user_function ()) |
|
|
748 { |
|
|
749 tree_fvc *defn = sym_rec->def (); |
|
|
750 |
|
|
751 if (nargout == 0 && ! quiet) |
|
|
752 output_buf << *argv << " is a user-defined function\n"; |
|
|
753 |
|
|
754 defn->print_code (output_buf); |
|
|
755 } |
|
|
756 |
|
|
757 // XXX FIXME XXX -- this code should be shared with Fwhich |
|
|
758 |
|
|
759 else if (sym_rec->is_text_function ()) |
|
|
760 output_buf << *argv << " is a builtin text-function\n"; |
|
|
761 else if (sym_rec->is_builtin_function ()) |
|
|
762 output_buf << *argv << " is a builtin function\n"; |
|
|
763 else if (sym_rec->is_user_variable ()) |
|
625
|
764 { |
|
|
765 tree_fvc *defn = sym_rec->def (); |
|
|
766 |
|
|
767 if (nargout == 0 && ! quiet) |
|
|
768 output_buf << *argv << " is a user-defined variable\n"; |
|
|
769 |
|
|
770 defn->print_code (output_buf); |
|
|
771 |
|
|
772 if (nargout == 0) |
|
|
773 output_buf << "\n"; |
|
|
774 } |
|
581
|
775 else if (sym_rec->is_builtin_variable ()) |
|
625
|
776 { |
|
|
777 tree_fvc *defn = sym_rec->def (); |
|
|
778 |
|
|
779 if (nargout == 0 && ! quiet) |
|
|
780 output_buf << *argv << " is a builtin variable\n"; |
|
|
781 |
|
|
782 defn->print_code (output_buf); |
|
|
783 |
|
|
784 if (nargout == 0) |
|
|
785 output_buf << "\n"; |
|
|
786 } |
|
581
|
787 else |
|
|
788 output_buf << "type: `" << *argv << "' has unknown type!\n"; |
|
|
789 } |
|
|
790 else |
|
|
791 output_buf << "type: `" << *argv << "' undefined\n"; |
|
|
792 } |
|
|
793 |
|
|
794 output_buf << ends; |
|
|
795 |
|
|
796 if (nargout == 0) |
|
|
797 maybe_page_output (output_buf); |
|
|
798 else |
|
|
799 { |
|
|
800 char *s = output_buf.str (); |
|
|
801 retval = s; |
|
|
802 delete s; |
|
|
803 } |
|
|
804 } |
|
|
805 else |
|
|
806 print_usage ("type"); |
|
|
807 |
|
|
808 DELETE_ARGV; |
|
|
809 |
|
|
810 return retval; |
|
|
811 } |
|
|
812 |
|
|
813 DEFUN_TEXT ("which", Fwhich, Swhich, -1, 1, |
|
|
814 "which NAME ...]\n\ |
|
|
815 \n\ |
|
|
816 display the type of each NAME. If NAME is defined from an function\n\ |
|
|
817 file, print the full name of the file.") |
|
|
818 { |
|
|
819 Octave_object retval; |
|
|
820 |
|
|
821 DEFINE_ARGV("which"); |
|
|
822 |
|
|
823 if (argc > 1) |
|
|
824 { |
|
|
825 if (nargout > 0) |
|
|
826 retval.resize (argc-1, Matrix ()); |
|
|
827 |
|
|
828 ostrstream output_buf; |
|
|
829 |
|
|
830 for (int i = 0; i < argc-1; i++) |
|
|
831 { |
|
|
832 argv++; |
|
|
833 |
|
|
834 if (! *argv || ! **argv) |
|
|
835 continue; |
|
|
836 |
|
962
|
837 symbol_record *sym_rec = lookup_by_name (*argv, 0); |
|
581
|
838 |
|
|
839 if (sym_rec) |
|
|
840 { |
|
742
|
841 int print = (nargout == 0); |
|
|
842 char *tmp = print_symbol_type (output_buf, sym_rec, |
|
|
843 *argv, print); |
|
|
844 if (! print) |
|
|
845 retval(i) = tmp; |
|
581
|
846 } |
|
|
847 else |
|
|
848 { |
|
|
849 if (nargout == 0) |
|
|
850 output_buf << "which: `" << *argv << "' is undefined\n"; |
|
|
851 else |
|
|
852 retval(i) = "undefined"; |
|
|
853 } |
|
|
854 } |
|
|
855 output_buf << ends; |
|
|
856 maybe_page_output (output_buf); |
|
|
857 } |
|
|
858 else |
|
|
859 print_usage ("which"); |
|
|
860 |
|
|
861 DELETE_ARGV; |
|
|
862 |
|
|
863 return retval; |
|
|
864 } |
|
|
865 |
|
1
|
866 /* |
|
|
867 ;;; Local Variables: *** |
|
|
868 ;;; mode: C++ *** |
|
|
869 ;;; page-delimiter: "^/\\*" *** |
|
|
870 ;;; End: *** |
|
|
871 */ |
