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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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529
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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 #ifdef USE_GNU_INFO |
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529
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50 extern "C" |
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51 { |
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52 #include "info/info.h" |
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53 #include "info/dribble.h" |
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54 #include "info/terminal.h" |
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55 |
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56 extern int initialize_info_session (); |
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57 extern int index_entry_exists (); |
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58 extern int do_info_index_search (); |
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59 extern void finish_info_session (); |
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60 extern char *replace_in_documentation (); |
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61 } |
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62 #endif |
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63 |
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64 extern "C" |
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65 { |
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529
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66 // XXX FIXME XXX |
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67 #undef __FUNCTION_DEF |
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68 #include <readline/tilde.h> |
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69 } |
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70 |
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71 #include "pathsearch.h" |
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72 |
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73 static help_list operators[] = |
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74 { |
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75 { "!", |
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76 "Logical not operator. See also `~'.\n", }, |
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77 |
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78 { "!=", |
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79 "Logical not equals operator. See also `~' and `<>'.\n", }, |
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80 |
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81 { "\"", |
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82 "String delimiter.\n", }, |
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83 |
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84 { "#", |
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85 "Begin comment character. See also `%'.", }, |
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86 |
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87 { "%", |
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88 "Begin comment charcter. See also `#'.", }, |
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89 |
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90 { "&", |
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928
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91 "Logical and operator. See also `&&'.", }, |
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92 |
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93 { "&&", |
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94 "Logical and operator. See also `&'.", }, |
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95 |
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96 { "'", |
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97 "Matrix transpose operator. For complex matrices, computes the\n\ |
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98 complex conjugate (Hermitian) transpose. See also `.''\n\ |
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99 \n\ |
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100 The single quote character may also be used to delimit strings, but\n\ |
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101 it is better to use the double quote character, since that is never\n\ |
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102 ambiguous", }, |
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103 |
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104 { "(", |
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105 "Array index or function argument delimiter.", }, |
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106 |
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107 { ")", |
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928
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108 "Array index or function argument delimiter.", }, |
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109 |
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110 { "*", |
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111 "Multiplication operator. See also `.*'", }, |
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112 |
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113 { "**", |
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114 "Power operator. See also `^', `.**', and `.^'", }, |
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115 |
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116 { "+", |
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117 "Addition operator.", }, |
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118 |
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119 { "++", |
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120 "Increment operator. As in C, may be applied as a prefix or postfix operator.", }, |
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121 |
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122 { ",", |
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123 "Array index, function argument, or command separator.", }, |
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124 |
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125 { "-", |
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126 "Subtraction or unary negation operator.", }, |
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127 |
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128 { "--", |
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129 "Decrement operator. As in C, may be applied as a prefix or postfix operator.", }, |
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130 |
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131 { ".'", |
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132 "Matrix transpose operator. For complex matrices, computes the\n\ |
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133 transpose, *not* the complex conjugate transpose. See also `''.", }, |
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134 |
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135 { ".*", |
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136 "Element by element multiplication operator. See also `*'.", }, |
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137 |
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138 { ".**", |
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139 "Element by element power operator. See also `**', `^', and `.^'.", }, |
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140 |
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141 { "./", |
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142 "Element by element division operator. See also `/' and `\\'.", }, |
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143 |
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144 { ".^", |
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145 "Element by element power operator. See also `**', `^', and `.^'.", }, |
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146 |
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147 { "/", |
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148 "Right division. See also `\\' and `./'.", }, |
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149 |
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150 { ":", |
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151 "Select entire rows or columns of matrices.", }, |
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152 |
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153 { ";", |
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154 "Array row or command separator. See also `,'.", }, |
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155 |
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156 { "<", |
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157 "Less than operator.", }, |
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158 |
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159 { "<=", |
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160 "Less than or equals operator.", }, |
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161 |
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162 { "<>", |
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163 "Logical not equals operator. See also `!=' and `~='.", }, |
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164 |
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165 { "=", |
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166 "Assignment operator.", }, |
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167 |
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168 { "==", |
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169 "Equality test operator.", }, |
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170 |
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171 { ">", |
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172 "Greater than operator.", }, |
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173 |
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174 { ">=", |
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175 "Greater than or equals operator.", }, |
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176 |
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177 { "[", |
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178 "Return list delimiter. See also `]'.", }, |
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179 |
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180 { "\\", |
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181 "Left division operator. See also `/' and `./'.", }, |
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182 |
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183 { "]", |
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184 "Return list delimiter. See also `['.", }, |
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185 |
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186 { "^", |
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187 "Power operator. See also `**', `.^', and `.**.'", }, |
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188 |
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189 { "|", |
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190 "Logical or operator. See also `||'.", }, |
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191 |
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192 { "||", |
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193 "Logical or operator. See also `|'.", }, |
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194 |
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195 { "~", |
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196 "Logical not operator. See also `!' and `~'.", }, |
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197 |
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198 { "~=", |
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199 "Logical not equals operator. See also `<>' and `!='.", }, |
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200 |
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529
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201 { 0, 0, }, |
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202 }; |
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203 |
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204 static help_list keywords[] = |
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205 { |
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206 { "all_va_args", |
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207 "Pass all unnamed arguments to another function call.", }, |
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208 |
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209 { "break", |
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210 "Exit the innermost enclosing while or for loop.", }, |
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211 |
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212 { "continue", |
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213 "Jump to the end of the innermost enclosing while or for loop.", }, |
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214 |
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215 { "else", |
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216 "Alternate action for an if block.", }, |
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217 |
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218 { "elseif", |
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219 "Alternate conditional test for an if block.", }, |
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220 |
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221 { "end", |
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222 "Mark the end of any for, if, while, or function block.", }, |
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223 |
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224 { "end_unwind_protect", |
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225 "Mark the end of an unwind_protect block.", }, |
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226 |
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227 { "endfor", |
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228 "Mark the end of a for loop.", }, |
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229 |
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230 { "endfunction", |
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231 "Mark the end of a function.", }, |
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232 |
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233 { "endif", |
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234 "Mark the end of an if block.", }, |
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235 |
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236 { "endwhile", |
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237 "Mark the end of a while loop.", }, |
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238 |
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239 { "for", |
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240 "Begin a for loop.", }, |
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241 |
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242 { "function", |
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243 "Begin a function body.", }, |
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244 |
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245 { "global", |
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246 "Declare variables to have global scope.", }, |
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247 |
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248 { "gplot", |
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249 "Produce 2-D plots using gnuplot-like command syntax.", }, |
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250 |
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251 { "gsplot", |
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252 "Produce 3-D plots using gnuplot-like command syntax.", }, |
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253 |
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254 { "if", |
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255 "Begin an if block.", }, |
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256 |
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257 { "return", |
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258 "Return from a function.", }, |
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259 |
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260 { "unwind_protect", |
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261 "Begin an unwind_protect block.", }, |
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262 |
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263 { "unwind_protect_cleanup", |
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264 "Begin the cleanup section of an unwind_protect block.", }, |
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265 |
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266 { "while", |
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267 "Begin a while loop.", }, |
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268 |
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529
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269 { 0, 0, }, |
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270 }; |
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271 |
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272 // Return a copy of the operator or keyword names. |
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273 |
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274 char ** |
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275 names (help_list *lst, int& count) |
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276 { |
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277 count = 0; |
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278 help_list *ptr = lst; |
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279 while (ptr->name) |
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280 { |
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281 count++; |
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282 ptr++; |
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283 } |
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284 |
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285 if (count == 0) |
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286 return 0; |
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287 |
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288 char **name_list = new char * [count+1]; |
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289 |
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290 ptr = lst; |
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291 int i = 0; |
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292 while (ptr->name) |
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293 { |
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294 name_list[i++] = strsave (ptr->name); |
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295 ptr++; |
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296 } |
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297 |
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298 name_list[i] = 0; |
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299 return name_list; |
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300 } |
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301 |
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302 help_list * |
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303 operator_help (void) |
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304 { |
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305 return operators; |
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306 } |
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307 |
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308 help_list * |
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309 keyword_help (void) |
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310 { |
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311 return keywords; |
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312 } |
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313 |
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314 #define VERBOSE_HELP_MESSAGE \ |
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315 "\n\ |
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316 Additional help for builtin functions, operators, and variables\n\ |
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317 is available in the on-line version of the manual.\n\ |
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318 \n\ |
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319 Use the command `help -i <topic>' to search the manual index.\n" |
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320 |
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321 static void |
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322 additional_help_message (ostrstream& output_buf) |
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323 { |
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324 #ifdef USE_GNU_INFO |
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325 if (! user_pref.suppress_verbose_help_message) |
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326 output_buf << VERBOSE_HELP_MESSAGE; |
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327 #endif |
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328 } |
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329 |
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330 void |
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331 print_usage (const char *string, int just_usage) |
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332 { |
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333 ostrstream output_buf; |
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334 |
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335 symbol_record *sym_rec = global_sym_tab->lookup (string, 0, 0); |
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336 if (sym_rec) |
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337 { |
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338 char *h = sym_rec->help (); |
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339 if (h && *h) |
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340 { |
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341 output_buf << "\n*** " << string << ":\n\n" |
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342 << h << "\n"; |
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343 |
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344 if (! just_usage) |
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345 additional_help_message (output_buf); |
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542
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346 output_buf << ends; |
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347 maybe_page_output (output_buf); |
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348 } |
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349 } |
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350 else |
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351 warning ("no usage message found for `%s'", string); |
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542
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352 } |
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353 |
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529
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354 static void |
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542
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355 display_names_from_help_list (ostrstream& output_buf, help_list *list, |
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356 const char *desc) |
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529
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357 { |
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358 int count = 0; |
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359 char **symbols = names (list, count); |
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360 output_buf << "\n*** " << desc << ":\n\n"; |
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361 if (symbols && count > 0) |
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362 list_in_columns (output_buf, symbols); |
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363 delete [] symbols; |
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364 } |
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365 |
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742
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366 static char * |
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367 print_symbol_type (ostrstream& output_buf, symbol_record *sym_rec, |
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368 char *name, int print) |
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369 { |
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370 char *retval = 0; |
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371 |
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372 if (sym_rec->is_user_function ()) |
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373 { |
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374 tree_fvc *defn = sym_rec->def (); |
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375 char *fn = defn->fcn_file_name (); |
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376 if (fn) |
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377 { |
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378 char *ff = fcn_file_in_path (fn); |
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379 ff = ff ? ff : fn; |
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380 |
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381 if (print) |
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382 output_buf << name |
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383 << " is the function defined from:\n" |
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384 << ff << "\n"; |
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385 else |
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386 retval = ff; |
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387 } |
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388 else |
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389 { |
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390 if (print) |
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391 output_buf << name << " is a user-defined function\n"; |
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392 else |
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393 retval = "user-defined function"; |
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394 } |
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395 } |
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396 else if (sym_rec->is_text_function ()) |
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397 { |
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398 if (print) |
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399 output_buf << name << " is a builtin text-function\n"; |
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400 else |
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401 retval = "builtin text-function"; |
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402 } |
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403 else if (sym_rec->is_builtin_function ()) |
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404 { |
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405 if (print) |
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406 output_buf << name << " is a builtin function\n"; |
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407 else |
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408 retval = "builtin function"; |
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409 } |
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410 else if (sym_rec->is_user_variable ()) |
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411 { |
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412 if (print) |
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413 output_buf << name << " is a user-defined variable\n"; |
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414 else |
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415 retval = "user-defined variable"; |
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416 } |
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417 else if (sym_rec->is_builtin_variable ()) |
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418 { |
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419 if (print) |
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420 output_buf << name << " is a builtin variable\n"; |
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421 else |
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422 retval = "builtin variable"; |
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423 } |
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424 else |
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425 { |
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426 if (print) |
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427 output_buf << "which: `" << name |
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428 << "' has unknown type\n"; |
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429 else |
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430 retval = "unknown type"; |
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431 } |
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432 |
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433 return retval; |
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434 } |
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435 |
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529
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436 static void |
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542
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437 display_symtab_names (ostrstream& output_buf, char **names, |
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438 int count, const char *desc) |
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439 { |
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440 output_buf << "\n*** " << desc << ":\n\n"; |
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441 if (names && count > 0) |
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442 list_in_columns (output_buf, names); |
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443 } |
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444 |
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445 static void |
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529
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446 simple_help (void) |
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447 { |
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448 ostrstream output_buf; |
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449 |
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542
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450 display_names_from_help_list (output_buf, operator_help (), |
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451 "operators"); |
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529
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452 |
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542
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453 display_names_from_help_list (output_buf, keyword_help (), |
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454 "reserved words"); |
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529
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455 |
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542
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456 #ifdef LIST_SYMBOLS |
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457 #undef LIST_SYMBOLS |
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458 #endif |
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459 #define LIST_SYMBOLS(type, msg) \ |
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460 do \ |
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461 { \ |
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462 int count; \ |
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867
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463 char **names = global_sym_tab->list (count, 0, 0, 1, type); \ |
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542
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464 display_symtab_names (output_buf, names, count, msg); \ |
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465 char **ptr = names; \ |
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466 while (*ptr) \ |
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467 delete [] *ptr++; \ |
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468 delete [] names; \ |
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469 } \ |
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470 while (0) |
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529
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471 |
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542
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472 // XXX FIXME XXX -- is this distinction needed? |
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473 LIST_SYMBOLS (symbol_def::TEXT_FUNCTION, |
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474 "text functions (these names are also reserved)"); |
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529
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475 |
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542
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476 LIST_SYMBOLS (symbol_def::MAPPER_FUNCTION, "mapper functions"); |
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477 |
|
|
478 LIST_SYMBOLS (symbol_def::BUILTIN_FUNCTION, "general functions"); |
|
|
479 |
|
|
480 LIST_SYMBOLS (symbol_def::BUILTIN_VARIABLE, "builtin variables"); |
|
|
481 |
|
529
|
482 // Also need to list variables and currently compiled functions from |
|
|
483 // the symbol table, if there are any. |
|
|
484 |
|
|
485 // Also need to search octave_path for script files. |
|
|
486 |
|
679
|
487 char *path_elt = kpse_path_element (user_pref.loadpath); |
|
529
|
488 |
|
679
|
489 while (path_elt) |
|
529
|
490 { |
|
679
|
491 str_llist_type *elt_dirs = kpse_element_dirs (path_elt); |
|
|
492 |
|
|
493 str_llist_elt_type *dir; |
|
|
494 for (dir = *elt_dirs; dir; dir = STR_LLIST_NEXT (*dir)) |
|
529
|
495 { |
|
679
|
496 char *elt_dir = STR_LLIST (*dir); |
|
|
497 |
|
|
498 if (elt_dir) |
|
|
499 { |
|
|
500 int count; |
|
|
501 char **names = get_fcn_file_names (count, elt_dir, 0); |
|
|
502 |
|
|
503 output_buf << "\n*** function files in " |
|
|
504 << make_absolute (elt_dir, the_current_working_directory) |
|
|
505 << ":\n\n"; |
|
|
506 |
|
|
507 if (names && count > 0) |
|
|
508 list_in_columns (output_buf, names); |
|
|
509 |
|
|
510 delete [] names; |
|
|
511 } |
|
529
|
512 } |
|
1155
|
513 |
|
679
|
514 path_elt = kpse_path_element (0); |
|
529
|
515 } |
|
|
516 |
|
|
517 additional_help_message (output_buf); |
|
|
518 output_buf << ends; |
|
|
519 maybe_page_output (output_buf); |
|
|
520 } |
|
|
521 |
|
1140
|
522 #ifdef USE_GNU_INFO |
|
529
|
523 static int |
|
|
524 try_info (const char *string, int force = 0) |
|
|
525 { |
|
|
526 int status = 0; |
|
|
527 |
|
|
528 char *directory_name = strsave (user_pref.info_file); |
|
|
529 char *temp = filename_non_directory (directory_name); |
|
|
530 |
|
|
531 if (temp != directory_name) |
|
|
532 { |
|
|
533 *temp = 0; |
|
|
534 info_add_path (directory_name, INFOPATH_PREPEND); |
|
|
535 } |
|
|
536 |
|
|
537 delete [] directory_name; |
|
|
538 |
|
|
539 NODE *initial_node = info_get_node (user_pref.info_file, 0); |
|
|
540 |
|
|
541 if (! initial_node) |
|
|
542 { |
|
|
543 warning ("can't find info file!\n"); |
|
|
544 status = -1; |
|
|
545 } |
|
|
546 else |
|
|
547 { |
|
|
548 status = initialize_info_session (initial_node, 0); |
|
|
549 |
|
|
550 if (status == 0 && (force || index_entry_exists (windows, string))) |
|
|
551 { |
|
|
552 terminal_clear_screen (); |
|
|
553 |
|
|
554 terminal_prep_terminal (); |
|
|
555 |
|
|
556 display_update_display (windows); |
|
|
557 |
|
|
558 info_last_executed_command = 0; |
|
|
559 |
|
|
560 if (! force) |
|
|
561 do_info_index_search (windows, 0, string); |
|
|
562 |
|
|
563 char *format = replace_in_documentation |
|
|
564 ("Type \"\\[quit]\" to quit, \"\\[get-help-window]\" for help."); |
|
|
565 |
|
|
566 window_message_in_echo_area (format); |
|
|
567 |
|
|
568 info_read_and_dispatch (); |
|
|
569 |
|
|
570 terminal_goto_xy (0, screenheight - 1); |
|
|
571 |
|
|
572 terminal_clear_to_eol (); |
|
|
573 |
|
|
574 terminal_unprep_terminal (); |
|
|
575 |
|
|
576 status = 1; |
|
|
577 } |
|
|
578 |
|
|
579 finish_info_session (initial_node, 0); |
|
|
580 } |
|
|
581 |
|
|
582 return status; |
|
|
583 } |
|
1140
|
584 #endif |
|
|
585 |
|
|
586 static void |
|
|
587 help_from_info (int argc, char **argv) |
|
|
588 { |
|
|
589 #ifdef USE_GNU_INFO |
|
|
590 if (argc == 1) |
|
|
591 { |
|
|
592 volatile sig_handler *old_sigint_handler; |
|
|
593 old_sigint_handler = signal (SIGINT, SIG_IGN); |
|
|
594 |
|
|
595 try_info (0, 1); |
|
|
596 |
|
|
597 signal (SIGINT, old_sigint_handler); |
|
|
598 } |
|
|
599 else |
|
|
600 { |
|
|
601 while (--argc > 0) |
|
|
602 { |
|
|
603 argv++; |
|
|
604 |
|
|
605 if (! *argv || ! **argv) |
|
|
606 continue; |
|
|
607 |
|
|
608 volatile sig_handler *old_sigint_handler; |
|
|
609 old_sigint_handler = signal (SIGINT, SIG_IGN); |
|
|
610 |
|
|
611 if (! try_info (*argv)) |
|
|
612 { |
|
|
613 message ("help", "sorry, `%s' is not indexed in the manual", |
|
|
614 *argv); |
|
|
615 sleep (2); |
|
|
616 } |
|
|
617 |
|
|
618 signal (SIGINT, old_sigint_handler); |
|
|
619 } |
|
|
620 } |
|
|
621 #else |
|
|
622 message (0, "sorry, help -i is not available in this version of Octave"); |
|
|
623 #endif |
|
|
624 } |
|
529
|
625 |
|
542
|
626 int |
|
|
627 help_from_list (ostrstream& output_buf, const help_list *list, |
|
|
628 const char *string, int usage) |
|
|
629 { |
|
|
630 char *name; |
|
|
631 while ((name = list->name) != 0) |
|
|
632 { |
|
|
633 if (strcmp (name, string) == 0) |
|
|
634 { |
|
|
635 if (usage) |
|
|
636 output_buf << "\nusage: "; |
|
|
637 else |
|
|
638 { |
|
|
639 output_buf << "\n*** " << string << ":\n\n"; |
|
|
640 } |
|
|
641 |
|
|
642 output_buf << list->help << "\n"; |
|
|
643 |
|
|
644 return 1; |
|
|
645 } |
|
|
646 list++; |
|
|
647 } |
|
|
648 return 0; |
|
|
649 } |
|
|
650 |
|
1140
|
651 static void |
|
|
652 builtin_help (int argc, char **argv) |
|
|
653 { |
|
|
654 ostrstream output_buf; |
|
|
655 |
|
|
656 help_list *op_help_list = operator_help (); |
|
|
657 help_list *kw_help_list = keyword_help (); |
|
|
658 |
|
|
659 while (--argc > 0) |
|
|
660 { |
|
|
661 argv++; |
|
|
662 |
|
|
663 if (! *argv || ! **argv) |
|
|
664 continue; |
|
|
665 |
|
|
666 if (help_from_list (output_buf, op_help_list, *argv, 0)) |
|
|
667 continue; |
|
|
668 |
|
|
669 if (help_from_list (output_buf, kw_help_list, *argv, 0)) |
|
|
670 continue; |
|
|
671 |
|
|
672 symbol_record *sym_rec = lookup_by_name (*argv, 0); |
|
|
673 |
|
|
674 if (sym_rec && sym_rec->is_defined ()) |
|
|
675 { |
|
|
676 char *h = sym_rec->help (); |
|
|
677 if (h && *h) |
|
|
678 { |
|
|
679 print_symbol_type (output_buf, sym_rec, *argv, 1); |
|
|
680 output_buf << "\n" << h << "\n"; |
|
|
681 continue; |
|
|
682 } |
|
|
683 } |
|
|
684 |
|
|
685 char *path = fcn_file_in_path (*argv); |
|
|
686 char *h = get_help_from_file (path); |
|
|
687 if (h && *h) |
|
|
688 { |
|
|
689 output_buf << *argv << " is the file:\n" |
|
|
690 << path << "\n\n" << h << "\n"; |
|
|
691 delete [] h; |
|
|
692 delete [] path; |
|
|
693 continue; |
|
|
694 } |
|
|
695 delete [] path; |
|
|
696 |
|
|
697 output_buf << "\nhelp: sorry, `" << *argv << "' is not documented\n"; |
|
|
698 } |
|
|
699 |
|
|
700 additional_help_message (output_buf); |
|
|
701 output_buf << ends; |
|
|
702 maybe_page_output (output_buf); |
|
|
703 } |
|
|
704 |
|
|
705 #ifdef USE_GNU_INFO |
|
529
|
706 DEFUN_TEXT ("help", Fhelp, Shelp, -1, 1, |
|
|
707 "help [-i] [topic ...]\n\ |
|
|
708 \n\ |
|
|
709 print cryptic yet witty messages") |
|
1140
|
710 #else |
|
|
711 DEFUN_TEXT ("help", Fhelp, Shelp, -1, 1, |
|
|
712 "help [topic ...]\n\ |
|
|
713 \n\ |
|
|
714 print cryptic yet witty messages") |
|
|
715 #endif |
|
529
|
716 { |
|
|
717 Octave_object retval; |
|
|
718 |
|
|
719 DEFINE_ARGV("help"); |
|
|
720 |
|
|
721 if (argc == 1) |
|
|
722 { |
|
|
723 simple_help (); |
|
|
724 } |
|
|
725 else |
|
|
726 { |
|
|
727 if (argv[1] && strcmp (argv[1], "-i") == 0) |
|
|
728 { |
|
|
729 argc--; |
|
|
730 argv++; |
|
|
731 |
|
1140
|
732 help_from_info (argc, argv); |
|
529
|
733 } |
|
|
734 else |
|
|
735 { |
|
1140
|
736 builtin_help (argc, argv); |
|
529
|
737 } |
|
|
738 } |
|
|
739 |
|
|
740 DELETE_ARGV; |
|
|
741 |
|
|
742 return retval; |
|
|
743 } |
|
|
744 |
|
581
|
745 DEFUN_TEXT ("type", Ftype, Stype, -1, 1, |
|
|
746 "type NAME ...]\n\ |
|
|
747 \n\ |
|
|
748 display the definition of each NAME that refers to a function") |
|
|
749 { |
|
|
750 Octave_object retval; |
|
|
751 |
|
|
752 DEFINE_ARGV("type"); |
|
|
753 |
|
|
754 if (argc > 1) |
|
|
755 { |
|
|
756 // XXX FIXME XXX -- we should really use getopt () |
|
|
757 int quiet = 0; |
|
|
758 if (argv[1] && strcmp (argv[1], "-q") == 0) |
|
|
759 { |
|
|
760 quiet = 1; |
|
|
761 argc--; |
|
|
762 argv++; |
|
|
763 } |
|
|
764 |
|
|
765 ostrstream output_buf; |
|
|
766 |
|
|
767 while (--argc > 0) |
|
|
768 { |
|
|
769 argv++; |
|
|
770 |
|
|
771 if (! *argv || ! **argv) |
|
|
772 continue; |
|
|
773 |
|
1281
|
774 char *id = strsave (*argv); |
|
|
775 char *elts = 0; |
|
|
776 char *ptr = strchr (id, '.'); |
|
|
777 if (ptr) |
|
|
778 { |
|
|
779 *ptr = '\0'; |
|
|
780 |
|
|
781 elts = ptr + 1; |
|
|
782 ptr = strrchr (elts, '.'); |
|
|
783 if (ptr) |
|
|
784 *ptr = '\0'; |
|
|
785 else |
|
|
786 elts = 0; |
|
|
787 } |
|
|
788 |
|
|
789 symbol_record *sym_rec = lookup_by_name (id, 0); |
|
581
|
790 |
|
|
791 if (sym_rec) |
|
|
792 { |
|
|
793 if (sym_rec->is_user_function ()) |
|
|
794 { |
|
|
795 tree_fvc *defn = sym_rec->def (); |
|
|
796 |
|
|
797 if (nargout == 0 && ! quiet) |
|
|
798 output_buf << *argv << " is a user-defined function\n"; |
|
|
799 |
|
|
800 defn->print_code (output_buf); |
|
|
801 } |
|
|
802 |
|
|
803 // XXX FIXME XXX -- this code should be shared with Fwhich |
|
|
804 |
|
|
805 else if (sym_rec->is_text_function ()) |
|
|
806 output_buf << *argv << " is a builtin text-function\n"; |
|
|
807 else if (sym_rec->is_builtin_function ()) |
|
|
808 output_buf << *argv << " is a builtin function\n"; |
|
1281
|
809 else if (sym_rec->is_user_variable () |
|
|
810 || sym_rec->is_builtin_variable ()) |
|
625
|
811 { |
|
|
812 tree_fvc *defn = sym_rec->def (); |
|
|
813 |
|
1281
|
814 assert (defn->is_constant ()); |
|
|
815 |
|
|
816 tree_constant *tmp = (tree_constant *) defn; |
|
625
|
817 |
|
1281
|
818 int var_ok = 1; |
|
|
819 if (tmp && tmp->is_map ()) |
|
|
820 { |
|
|
821 if (elts && *elts) |
|
|
822 { |
|
|
823 tree_constant ult; |
|
|
824 ult = tmp->lookup_map_element (elts, 0, 1); |
|
625
|
825 |
|
1281
|
826 if (! ult.is_defined ()) |
|
|
827 var_ok = 0; |
|
|
828 } |
|
|
829 } |
|
|
830 |
|
|
831 if (nargout == 0 && ! quiet) |
|
|
832 { |
|
|
833 output_buf << *argv; |
|
|
834 if (sym_rec->is_user_variable ()) |
|
|
835 output_buf << " is a user-defined variable\n"; |
|
|
836 else |
|
|
837 output_buf << " is a built-in variable\n"; |
|
|
838 } |
|
625
|
839 |
|
1281
|
840 if (! tmp->is_map ()) |
|
|
841 { |
|
|
842 tmp->print_code (output_buf); |
|
625
|
843 |
|
1281
|
844 if (nargout == 0) |
|
|
845 output_buf << "\n"; |
|
|
846 } |
|
625
|
847 } |
|
581
|
848 else |
|
|
849 output_buf << "type: `" << *argv << "' has unknown type!\n"; |
|
|
850 } |
|
|
851 else |
|
|
852 output_buf << "type: `" << *argv << "' undefined\n"; |
|
1281
|
853 |
|
|
854 delete [] id; |
|
581
|
855 } |
|
|
856 |
|
|
857 output_buf << ends; |
|
|
858 |
|
|
859 if (nargout == 0) |
|
|
860 maybe_page_output (output_buf); |
|
|
861 else |
|
|
862 { |
|
|
863 char *s = output_buf.str (); |
|
|
864 retval = s; |
|
|
865 delete s; |
|
|
866 } |
|
|
867 } |
|
|
868 else |
|
|
869 print_usage ("type"); |
|
|
870 |
|
|
871 DELETE_ARGV; |
|
|
872 |
|
|
873 return retval; |
|
|
874 } |
|
|
875 |
|
|
876 DEFUN_TEXT ("which", Fwhich, Swhich, -1, 1, |
|
|
877 "which NAME ...]\n\ |
|
|
878 \n\ |
|
|
879 display the type of each NAME. If NAME is defined from an function\n\ |
|
|
880 file, print the full name of the file.") |
|
|
881 { |
|
|
882 Octave_object retval; |
|
|
883 |
|
|
884 DEFINE_ARGV("which"); |
|
|
885 |
|
|
886 if (argc > 1) |
|
|
887 { |
|
|
888 if (nargout > 0) |
|
|
889 retval.resize (argc-1, Matrix ()); |
|
|
890 |
|
|
891 ostrstream output_buf; |
|
|
892 |
|
|
893 for (int i = 0; i < argc-1; i++) |
|
|
894 { |
|
|
895 argv++; |
|
|
896 |
|
|
897 if (! *argv || ! **argv) |
|
|
898 continue; |
|
|
899 |
|
962
|
900 symbol_record *sym_rec = lookup_by_name (*argv, 0); |
|
581
|
901 |
|
|
902 if (sym_rec) |
|
|
903 { |
|
742
|
904 int print = (nargout == 0); |
|
|
905 char *tmp = print_symbol_type (output_buf, sym_rec, |
|
|
906 *argv, print); |
|
|
907 if (! print) |
|
|
908 retval(i) = tmp; |
|
581
|
909 } |
|
|
910 else |
|
|
911 { |
|
|
912 if (nargout == 0) |
|
|
913 output_buf << "which: `" << *argv << "' is undefined\n"; |
|
|
914 else |
|
|
915 retval(i) = "undefined"; |
|
|
916 } |
|
|
917 } |
|
|
918 output_buf << ends; |
|
|
919 maybe_page_output (output_buf); |
|
|
920 } |
|
|
921 else |
|
|
922 print_usage ("which"); |
|
|
923 |
|
|
924 DELETE_ARGV; |
|
|
925 |
|
|
926 return retval; |
|
|
927 } |
|
|
928 |
|
1
|
929 /* |
|
|
930 ;;; Local Variables: *** |
|
|
931 ;;; mode: C++ *** |
|
|
932 ;;; page-delimiter: "^/\\*" *** |
|
|
933 ;;; End: *** |
|
|
934 */ |
