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