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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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240
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23 #ifdef HAVE_CONFIG_H |
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1192
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24 #include <config.h> |
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25 #endif |
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26 |
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27 #include <cstdlib> |
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28 #include <cstring> |
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29 |
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3503
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30 #include <iostream> |
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31 #include <fstream> |
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32 #include <string> |
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33 |
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1350
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34 #ifdef HAVE_UNISTD_H |
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2442
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35 #ifdef HAVE_SYS_TYPES_H |
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36 #include <sys/types.h> |
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37 #endif |
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38 #include <unistd.h> |
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39 #endif |
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1343
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40 |
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3295
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41 #include "cmd-edit.h" |
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42 #include "file-ops.h" |
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4051
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43 #include "lo-sstream.h" |
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2926
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44 #include "oct-env.h" |
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1755
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45 #include "str-vec.h" |
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46 |
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2492
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47 #include <defaults.h> |
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1352
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48 #include "defun.h" |
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49 #include "dirfns.h" |
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50 #include "error.h" |
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2233
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51 #include "fn-cache.h" |
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2202
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52 #include "gripes.h" |
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1352
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53 #include "help.h" |
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2177
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54 #include "input.h" |
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1755
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55 #include "oct-obj.h" |
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2976
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56 #include "ov-usr-fcn.h" |
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1352
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57 #include "pager.h" |
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3018
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58 #include "parse.h" |
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1466
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59 #include "pathsearch.h" |
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3295
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60 #include "procstream.h" |
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529
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61 #include "sighandlers.h" |
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62 #include "symtab.h" |
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2694
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63 #include "syswait.h" |
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64 #include "toplev.h" |
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242
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65 #include "utils.h" |
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66 #include "variables.h" |
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67 #include "version.h" |
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68 |
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69 // Name of the info file specified on command line. |
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70 // (--info-file file) |
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71 std::string Vinfo_file; |
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72 |
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73 // Name of the info reader we'd like to use. |
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74 // (--info-program program) |
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75 std::string Vinfo_prog; |
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76 |
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77 // Name of the makeinfo program to run. |
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78 static std::string Vmakeinfo_prog = "makeinfo"; |
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79 |
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2189
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80 // If TRUE, don't print additional help message in help and usage |
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81 // functions. |
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82 static bool Vsuppress_verbose_help_message; |
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83 |
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3016
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84 // XXX FIXME XXX -- maybe this should use string instead of char*. |
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85 |
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86 struct help_list |
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87 { |
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88 const char *name; |
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89 const char *help; |
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90 }; |
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91 |
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92 static help_list operators[] = |
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93 { |
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94 { "!", |
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95 "Logical not operator. See also `~'.\n", }, |
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96 |
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97 { "!=", |
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98 "Logical not equals operator. See also `~' and `<>'.\n", }, |
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99 |
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100 { "\"", |
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101 "String delimiter.\n", }, |
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102 |
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103 { "#", |
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104 "Begin comment character. See also `%'.", }, |
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105 |
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106 { "%", |
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107 "Begin comment charcter. See also `#'.", }, |
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108 |
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109 { "&", |
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110 "Logical and operator. See also `&&'.", }, |
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111 |
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112 { "&&", |
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113 "Logical and operator. See also `&'.", }, |
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114 |
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115 { "'", |
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116 "Matrix transpose operator. For complex matrices, computes the\n\ |
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117 complex conjugate (Hermitian) transpose. See also `.''\n\ |
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118 \n\ |
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119 The single quote character may also be used to delimit strings, but\n\ |
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120 it is better to use the double quote character, since that is never\n\ |
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121 ambiguous", }, |
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122 |
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123 { "(", |
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928
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124 "Array index or function argument delimiter.", }, |
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125 |
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126 { ")", |
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928
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127 "Array index or function argument delimiter.", }, |
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128 |
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129 { "*", |
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928
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130 "Multiplication operator. See also `.*'", }, |
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131 |
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132 { "**", |
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928
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133 "Power operator. See also `^', `.**', and `.^'", }, |
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134 |
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135 { "+", |
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928
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136 "Addition operator.", }, |
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137 |
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138 { "++", |
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928
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139 "Increment operator. As in C, may be applied as a prefix or postfix operator.", }, |
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140 |
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141 { ",", |
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928
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142 "Array index, function argument, or command separator.", }, |
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143 |
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144 { "-", |
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928
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145 "Subtraction or unary negation operator.", }, |
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146 |
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147 { "--", |
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928
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148 "Decrement operator. As in C, may be applied as a prefix or postfix operator.", }, |
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149 |
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150 { ".'", |
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151 "Matrix transpose operator. For complex matrices, computes the\n\ |
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152 transpose, *not* the complex conjugate transpose. See also `''.", }, |
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153 |
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154 { ".*", |
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928
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155 "Element by element multiplication operator. See also `*'.", }, |
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156 |
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157 { ".**", |
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928
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158 "Element by element power operator. See also `**', `^', and `.^'.", }, |
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159 |
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160 { "./", |
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928
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161 "Element by element division operator. See also `/' and `\\'.", }, |
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162 |
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163 { ".^", |
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928
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164 "Element by element power operator. See also `**', `^', and `.^'.", }, |
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165 |
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166 { "/", |
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928
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167 "Right division. See also `\\' and `./'.", }, |
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168 |
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169 { ":", |
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170 "Select entire rows or columns of matrices.", }, |
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171 |
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172 { ";", |
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173 "Array row or command separator. See also `,'.", }, |
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174 |
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175 { "<", |
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176 "Less than operator.", }, |
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177 |
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178 { "<=", |
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928
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179 "Less than or equals operator.", }, |
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180 |
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181 { "<>", |
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928
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182 "Logical not equals operator. See also `!=' and `~='.", }, |
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183 |
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184 { "=", |
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185 "Assignment operator.", }, |
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186 |
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187 { "==", |
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188 "Equality test operator.", }, |
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189 |
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190 { ">", |
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191 "Greater than operator.", }, |
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192 |
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193 { ">=", |
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194 "Greater than or equals operator.", }, |
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195 |
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196 { "[", |
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197 "Return list delimiter. See also `]'.", }, |
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198 |
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199 { "\\", |
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200 "Left division operator. See also `/' and `./'.", }, |
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201 |
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202 { "]", |
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203 "Return list delimiter. See also `['.", }, |
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204 |
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205 { "^", |
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206 "Power operator. See also `**', `.^', and `.**.'", }, |
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207 |
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208 { "|", |
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209 "Logical or operator. See also `||'.", }, |
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210 |
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211 { "||", |
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212 "Logical or operator. See also `|'.", }, |
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213 |
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214 { "~", |
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215 "Logical not operator. See also `!' and `~'.", }, |
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216 |
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217 { "~=", |
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218 "Logical not equals operator. See also `<>' and `!='.", }, |
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219 |
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529
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220 { 0, 0, }, |
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221 }; |
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222 |
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223 static help_list keywords[] = |
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224 { |
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225 { "all_va_args", |
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226 "Pass all unnamed arguments to another function call.", }, |
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227 |
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228 { "break", |
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229 "Exit the innermost enclosing do, while or for loop.", }, |
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230 |
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231 { "case", |
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232 "A case statement in an switch. Octave cases are exclusive and do not\n\ |
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233 fall-through as do C-language cases. A switch statement must have at least\n\ |
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234 one case.",}, |
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235 |
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236 { "catch", |
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237 "begin the cleanup part of a try-catch block", }, |
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238 |
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239 { "continue", |
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240 "Jump to the end of the innermost enclosing do, while or for loop.", }, |
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241 |
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242 { "do", |
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243 "Begin a do-until loop. This differs from a do-while loop in that the\n\ |
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244 body of the loop is executed at least once.",}, |
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245 |
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246 { "else", |
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247 "Alternate action for an if block.", }, |
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248 |
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249 { "elseif", |
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250 "Alternate conditional test for an if block.", }, |
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251 |
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252 { "end", |
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253 "Mark the end of any for, if, do, while, or function block.", }, |
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254 |
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255 { "end_try_catch", |
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256 "Mark the end of an try-catch block.", }, |
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257 |
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258 { "end_unwind_protect", |
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259 "Mark the end of an unwind_protect block.", }, |
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260 |
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261 { "endfor", |
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262 "Mark the end of a for loop.", }, |
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263 |
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264 { "endfunction", |
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265 "Mark the end of a function.", }, |
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266 |
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267 { "endif", |
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268 "Mark the end of an if block.", }, |
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269 |
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270 { "endswitch", |
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271 "Mark the end of a switch block.", }, |
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272 |
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273 { "endwhile", |
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274 "Mark the end of a while loop.", }, |
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275 |
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276 { "for", |
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277 "Begin a for loop.", }, |
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278 |
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279 { "function", |
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280 "Begin a function body.", }, |
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281 |
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282 { "global", |
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283 "Declare variables to have global scope.", }, |
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284 |
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285 { "gplot", |
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286 "Produce 2-D plots using gnuplot-like command syntax.", }, |
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287 |
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288 { "gsplot", |
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289 "Produce 3-D plots using gnuplot-like command syntax.", }, |
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290 |
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291 { "if", |
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292 "Begin an if block.", }, |
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293 |
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294 { "otherwise", |
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295 "The default statement in a switch block.", }, |
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296 |
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297 { "persistent", |
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298 "Declare variables as persistent.", }, |
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299 |
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5040
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300 { "replot", |
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301 "Replot a graphic.", }, |
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302 |
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1
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303 { "return", |
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304 "Return from a function.", }, |
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305 |
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5040
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306 { "static", |
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307 "Declare variables as persistent.", }, |
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308 |
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309 { "switch", |
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310 "Begin a switch statement.",}, |
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311 |
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312 { "try", |
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313 "Begin a try-catch block.", }, |
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314 |
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5040
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315 { "until", |
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316 "End a do-until loop.",}, |
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317 |
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928
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318 { "unwind_protect", |
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319 "Begin an unwind_protect block.", }, |
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320 |
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321 { "unwind_protect_cleanup", |
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322 "Begin the cleanup section of an unwind_protect block.", }, |
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323 |
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5040
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324 { "varargin", |
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325 "Pass an arbitrary number of arguments into a function.",}, |
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326 |
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327 { "varargout", |
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328 "Pass an arbitrary number of arguments out of a function.",}, |
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329 |
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1
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330 { "while", |
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331 "Begin a while loop.", }, |
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1
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332 |
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529
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333 { 0, 0, }, |
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1
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334 }; |
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335 |
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581
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336 // Return a copy of the operator or keyword names. |
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337 |
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3016
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338 static string_vector |
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3355
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339 names (help_list *lst) |
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1
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340 { |
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341 string_vector retval; |
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342 |
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3355
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343 int count = 0; |
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1
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344 help_list *ptr = lst; |
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529
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345 while (ptr->name) |
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1
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346 { |
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347 count++; |
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348 ptr++; |
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349 } |
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350 |
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1755
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351 if (count > 0) |
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352 { |
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353 retval.resize (count); |
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354 |
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355 ptr = lst; |
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356 for (int i = 0; i < count; i++) |
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357 { |
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358 retval[i] = ptr->name; |
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359 ptr++; |
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360 } |
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1
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361 } |
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362 |
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363 return retval; |
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1
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364 } |
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365 |
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3014
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366 static help_list * |
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1
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367 operator_help (void) |
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368 { |
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369 return operators; |
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370 } |
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371 |
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3016
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372 static help_list * |
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1
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373 keyword_help (void) |
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374 { |
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375 return keywords; |
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376 } |
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377 |
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3016
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378 // It's not likely that this does the right thing now. XXX FIXME XXX |
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379 |
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380 string_vector |
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381 make_name_list (void) |
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382 { |
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3355
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383 string_vector key = names (keyword_help ()); |
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384 int key_len = key.length (); |
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3016
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385 |
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4009
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386 string_vector fbi = fbi_sym_tab->name_list (); |
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387 int fbi_len = fbi.length (); |
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388 |
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3355
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389 string_vector glb = global_sym_tab->name_list (); |
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390 int glb_len = glb.length (); |
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3016
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391 |
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3355
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392 string_vector top = top_level_sym_tab->name_list (); |
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393 int top_len = top.length (); |
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3016
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394 |
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3355
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395 string_vector lcl; |
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3016
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396 if (top_level_sym_tab != curr_sym_tab) |
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3355
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397 lcl = curr_sym_tab->name_list (); |
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398 int lcl_len = lcl.length (); |
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3016
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399 |
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3355
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400 string_vector ffl = octave_fcn_file_name_cache::list_no_suffix (); |
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3016
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401 int ffl_len = ffl.length (); |
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402 |
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4009
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403 int total_len = key_len + fbi_len + glb_len + top_len + lcl_len + ffl_len; |
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3016
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404 |
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405 string_vector list (total_len); |
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406 |
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407 // Put all the symbols in one big list. |
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408 |
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409 int j = 0; |
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410 int i = 0; |
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411 for (i = 0; i < key_len; i++) |
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412 list[j++] = key[i]; |
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413 |
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4009
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414 for (i = 0; i < fbi_len; i++) |
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415 list[j++] = fbi[i]; |
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416 |
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3016
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417 for (i = 0; i < glb_len; i++) |
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418 list[j++] = glb[i]; |
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419 |
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420 for (i = 0; i < top_len; i++) |
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421 list[j++] = top[i]; |
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422 |
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423 for (i = 0; i < lcl_len; i++) |
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424 list[j++] = lcl[i]; |
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425 |
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426 for (i = 0; i < ffl_len; i++) |
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427 list[j++] = ffl[i]; |
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428 |
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429 return list; |
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430 } |
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431 |
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3014
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432 void |
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3523
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433 additional_help_message (std::ostream& os) |
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2470
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434 { |
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435 if (! Vsuppress_verbose_help_message) |
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436 os << "\n\ |
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3259
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437 Additional help for built-in functions, operators, and variables\n\ |
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3160
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438 is available in the on-line version of the manual. Use the command\n\ |
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3295
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439 `help -i <topic>' to search the manual index.\n\ |
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440 \n\ |
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3160
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441 Help and information about Octave is also available on the WWW\n\ |
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5041
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442 at http://www.octave.org and via the help@octave.org\n\ |
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3917
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443 mailing list.\n"; |
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3160
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444 } |
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445 |
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2976
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446 // XXX FIXME XXX -- this needs a major overhaul to cope with new |
|
|
447 // symbol table stuff. |
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448 |
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529
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449 static void |
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3523
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450 display_names_from_help_list (std::ostream& os, help_list *list, |
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542
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451 const char *desc) |
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529
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452 { |
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3355
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453 string_vector symbols = names (list); |
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3259
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454 |
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1808
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455 if (! symbols.empty ()) |
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456 { |
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2095
|
457 os << "\n*** " << desc << ":\n\n"; |
|
3259
|
458 |
|
|
459 symbols.qsort (); |
|
|
460 |
|
2095
|
461 symbols.list_in_columns (os); |
|
1808
|
462 } |
|
529
|
463 } |
|
|
464 |
|
|
465 static void |
|
3523
|
466 display_symtab_names (std::ostream& os, const string_vector& names, |
|
|
467 const std::string& desc) |
|
542
|
468 { |
|
1808
|
469 if (! names.empty ()) |
|
|
470 { |
|
2095
|
471 os << "\n*** " << desc << ":\n\n"; |
|
|
472 names.list_in_columns (os); |
|
1808
|
473 } |
|
542
|
474 } |
|
|
475 |
|
|
476 #ifdef LIST_SYMBOLS |
|
|
477 #undef LIST_SYMBOLS |
|
|
478 #endif |
|
|
479 #define LIST_SYMBOLS(type, msg) \ |
|
|
480 do \ |
|
|
481 { \ |
|
3259
|
482 string_vector names \ |
|
4009
|
483 = fbi_sym_tab->name_list (string_vector (), true, type); \ |
|
3355
|
484 display_symtab_names (octave_stdout, names, msg); \ |
|
542
|
485 } \ |
|
|
486 while (0) |
|
529
|
487 |
|
3014
|
488 static void |
|
|
489 simple_help (void) |
|
|
490 { |
|
3160
|
491 octave_stdout << "Help is available for the topics listed below.\n"; |
|
|
492 |
|
|
493 additional_help_message (octave_stdout); |
|
|
494 |
|
3014
|
495 display_names_from_help_list (octave_stdout, operator_help (), |
|
|
496 "operators"); |
|
|
497 |
|
|
498 display_names_from_help_list (octave_stdout, keyword_help (), |
|
|
499 "reserved words"); |
|
|
500 |
|
1358
|
501 // XXX FIXME XXX -- is this distinction needed? |
|
|
502 |
|
3259
|
503 LIST_SYMBOLS (symbol_record::BUILTIN_CONSTANT, "built-in constants"); |
|
|
504 |
|
|
505 LIST_SYMBOLS (symbol_record::BUILTIN_VARIABLE, "built-in variables"); |
|
|
506 |
|
4208
|
507 LIST_SYMBOLS (symbol_record::COMMAND, "commands"); |
|
529
|
508 |
|
3010
|
509 LIST_SYMBOLS (symbol_record::MAPPER_FUNCTION, "mapper functions"); |
|
542
|
510 |
|
3010
|
511 LIST_SYMBOLS (symbol_record::BUILTIN_FUNCTION, "general functions"); |
|
542
|
512 |
|
1358
|
513 // Also need to list variables and currently compiled functions from |
|
|
514 // the symbol table, if there are any. |
|
529
|
515 |
|
1358
|
516 // Also need to search octave_path for script files. |
|
529
|
517 |
|
3195
|
518 string_vector dirs = Vload_path_dir_path.all_directories (); |
|
679
|
519 |
|
1787
|
520 int len = dirs.length (); |
|
679
|
521 |
|
1787
|
522 for (int i = 0; i < len; i++) |
|
|
523 { |
|
2233
|
524 string_vector names = octave_fcn_file_name_cache::list (dirs[i]); |
|
679
|
525 |
|
1787
|
526 if (! names.empty ()) |
|
|
527 { |
|
3523
|
528 std::string dir |
|
2926
|
529 = octave_env::make_absolute (dirs[i], octave_env::getcwd ()); |
|
|
530 |
|
|
531 octave_stdout << "\n*** function files in " << dir << ":\n\n"; |
|
679
|
532 |
|
3259
|
533 names.qsort (); |
|
|
534 |
|
2095
|
535 names.list_in_columns (octave_stdout); |
|
529
|
536 } |
|
|
537 } |
|
|
538 } |
|
|
539 |
|
|
540 static int |
|
3523
|
541 try_info (const std::string& nm) |
|
529
|
542 { |
|
|
543 int status = 0; |
|
|
544 |
|
4051
|
545 OSSTREAM cmd_buf; |
|
1295
|
546 |
|
4469
|
547 cmd_buf << "\"" << Vinfo_prog << "\" --file \"" << Vinfo_file << "\""; |
|
1295
|
548 |
|
3523
|
549 std::string directory_name = Vinfo_file; |
|
1755
|
550 size_t pos = directory_name.rfind ('/'); |
|
|
551 |
|
|
552 if (pos != NPOS) |
|
529
|
553 { |
|
1755
|
554 directory_name.resize (pos + 1); |
|
4469
|
555 cmd_buf << " --directory \"" << directory_name << "\""; |
|
529
|
556 } |
|
|
557 |
|
1755
|
558 if (nm.length () > 0) |
|
|
559 cmd_buf << " --index-search " << nm; |
|
529
|
560 |
|
4051
|
561 cmd_buf << OSSTREAM_ENDS; |
|
529
|
562 |
|
2705
|
563 volatile octave_interrupt_handler old_interrupt_handler |
|
2554
|
564 = octave_ignore_interrupts (); |
|
529
|
565 |
|
4051
|
566 status = system (OSSTREAM_C_STR (cmd_buf)); |
|
|
567 |
|
|
568 OSSTREAM_FREEZE (cmd_buf); |
|
529
|
569 |
|
2554
|
570 octave_set_interrupt_handler (old_interrupt_handler); |
|
529
|
571 |
|
2694
|
572 if (WIFEXITED (status)) |
|
|
573 status = WEXITSTATUS (status); |
|
1295
|
574 else |
|
|
575 status = 127; |
|
529
|
576 |
|
|
577 return status; |
|
|
578 } |
|
1140
|
579 |
|
|
580 static void |
|
1755
|
581 help_from_info (const string_vector& argv, int idx, int argc) |
|
1140
|
582 { |
|
1755
|
583 if (idx == argc) |
|
3523
|
584 try_info (std::string ()); |
|
1140
|
585 else |
|
|
586 { |
|
1755
|
587 for (int i = idx; i < argc; i++) |
|
1140
|
588 { |
|
1755
|
589 int status = try_info (argv[i]); |
|
1140
|
590 |
|
1295
|
591 if (status) |
|
1140
|
592 { |
|
3295
|
593 if (status == 127) |
|
1295
|
594 { |
|
3185
|
595 error ("help: unable to find info"); |
|
|
596 error ("help: you need info 2.18 or later (texinfo 3.12)"); |
|
1295
|
597 break; |
|
|
598 } |
|
3295
|
599 else |
|
|
600 { |
|
|
601 message ("help", "sorry, `%s' is not indexed in the manual", |
|
|
602 argv[i].c_str ()); |
|
|
603 } |
|
1140
|
604 } |
|
|
605 } |
|
|
606 } |
|
2470
|
607 } |
|
3014
|
608 |
|
|
609 static bool |
|
3523
|
610 looks_like_texinfo (const std::string& msg, size_t& p1) |
|
3295
|
611 { |
|
|
612 p1 = msg.find ('\n'); |
|
|
613 |
|
3523
|
614 std::string t = msg.substr (0, p1); |
|
3295
|
615 |
|
|
616 if (p1 == NPOS) |
|
|
617 p1 = 0; |
|
|
618 |
|
|
619 size_t p2 = t.find ("-*- texinfo -*-"); |
|
|
620 |
|
|
621 return (p2 != NPOS); |
|
|
622 } |
|
|
623 |
|
3330
|
624 void |
|
3523
|
625 display_help_text (std::ostream& os, const std::string& msg) |
|
3295
|
626 { |
|
|
627 // Look for "-*- texinfo -*-" in first line of help message. If it |
|
|
628 // is present, use makeinfo to format the rest of the message before |
|
|
629 // sending it to the output stream. Otherwise, just print the |
|
|
630 // message. |
|
|
631 |
|
|
632 size_t pos; |
|
|
633 |
|
|
634 if (looks_like_texinfo (msg, pos)) |
|
|
635 { |
|
3523
|
636 std::string tmp_file_name = file_ops::tempnam ("", ""); |
|
3295
|
637 |
|
|
638 int cols = command_editor::terminal_cols (); |
|
|
639 |
|
|
640 if (cols > 16) |
|
|
641 cols--; |
|
|
642 |
|
|
643 if (cols > 64) |
|
|
644 cols -= 7; |
|
|
645 |
|
|
646 if (cols > 80) |
|
|
647 cols = 72; |
|
|
648 |
|
4051
|
649 OSSTREAM buf; |
|
|
650 |
|
4115
|
651 buf << "sed -e 's/^[#%][#%]* *//' -e 's/^ *@/@/' | " |
|
4469
|
652 << "\"" << Vmakeinfo_prog << "\"" |
|
3303
|
653 << " -D \"VERSION " << OCTAVE_VERSION << "\"" |
|
|
654 << " -D \"OCTAVEHOME " << OCTAVE_PREFIX << "\"" |
|
3584
|
655 << " -D \"TARGETHOSTTYPE " << OCTAVE_CANONICAL_HOST_TYPE << "\"" |
|
3301
|
656 << " --fill-column " << cols |
|
|
657 << " --no-warn" |
|
|
658 << " --no-validate" |
|
|
659 << " --no-headers" |
|
|
660 << " --force" |
|
4108
|
661 << " --output \"" << tmp_file_name << "\"" |
|
3303
|
662 << " > /dev/null 2>&1" |
|
4051
|
663 << OSSTREAM_ENDS; |
|
3295
|
664 |
|
4051
|
665 oprocstream filter (OSSTREAM_STR (buf)); |
|
3295
|
666 |
|
4051
|
667 OSSTREAM_FREEZE (buf); |
|
3295
|
668 |
|
3686
|
669 if (filter && filter.is_open ()) |
|
3295
|
670 { |
|
3405
|
671 filter << "@macro seealso {args}\n" |
|
3408
|
672 << "\n" |
|
|
673 << "@noindent\n" |
|
3405
|
674 << "See also: \\args\\.\n" |
|
|
675 << "@end macro\n"; |
|
|
676 |
|
3769
|
677 filter << msg.substr (pos+1) << std::endl; |
|
3295
|
678 |
|
3686
|
679 int status = filter.close (); |
|
3295
|
680 |
|
3523
|
681 std::ifstream tmp_file (tmp_file_name.c_str ()); |
|
3295
|
682 |
|
3686
|
683 if (WIFEXITED (status) && WEXITSTATUS (status) == 0) |
|
|
684 { |
|
|
685 int c; |
|
|
686 while ((c = tmp_file.get ()) != EOF) |
|
|
687 os << (char) c; |
|
3295
|
688 |
|
3686
|
689 tmp_file.close (); |
|
|
690 } |
|
|
691 else |
|
|
692 { |
|
|
693 warning ("help: Texinfo formatting filter exited abnormally"); |
|
|
694 warning ("help: raw Texinfo source of help text follows..."); |
|
|
695 |
|
|
696 os << "\n" << msg; |
|
|
697 } |
|
3295
|
698 |
|
|
699 file_ops::unlink (tmp_file_name); |
|
|
700 } |
|
|
701 else |
|
|
702 os << msg; |
|
|
703 } |
|
|
704 else |
|
|
705 os << msg; |
|
|
706 } |
|
|
707 |
|
|
708 static bool |
|
3523
|
709 help_from_list (std::ostream& os, const help_list *list, |
|
|
710 const std::string& nm, int usage) |
|
542
|
711 { |
|
2804
|
712 const char *name; |
|
3014
|
713 |
|
542
|
714 while ((name = list->name) != 0) |
|
|
715 { |
|
1755
|
716 if (strcmp (name, nm.c_str ()) == 0) |
|
542
|
717 { |
|
|
718 if (usage) |
|
2095
|
719 os << "\nusage: "; |
|
542
|
720 else |
|
|
721 { |
|
2095
|
722 os << "\n*** " << nm << ":\n\n"; |
|
542
|
723 } |
|
|
724 |
|
3295
|
725 display_help_text (os, list->help); |
|
|
726 |
|
|
727 os << "\n"; |
|
542
|
728 |
|
3014
|
729 return true; |
|
542
|
730 } |
|
|
731 list++; |
|
|
732 } |
|
3014
|
733 |
|
|
734 return false; |
|
542
|
735 } |
|
|
736 |
|
3355
|
737 static bool |
|
3523
|
738 help_from_symbol_table (std::ostream& os, const std::string& nm) |
|
3355
|
739 { |
|
|
740 bool retval = false; |
|
|
741 |
|
|
742 symbol_record *sym_rec = lookup_by_name (nm, 0); |
|
|
743 |
|
|
744 if (sym_rec && sym_rec->is_defined ()) |
|
|
745 { |
|
3523
|
746 std::string h = sym_rec->help (); |
|
3355
|
747 |
|
|
748 if (h.length () > 0) |
|
|
749 { |
|
|
750 sym_rec->which (os); |
|
|
751 os << "\n"; |
|
|
752 display_help_text (os, h); |
|
|
753 os << "\n"; |
|
|
754 retval = true; |
|
|
755 } |
|
|
756 } |
|
|
757 |
|
|
758 return retval; |
|
|
759 } |
|
|
760 |
|
|
761 static bool |
|
3523
|
762 help_from_file (std::ostream& os, const std::string& nm) |
|
3355
|
763 { |
|
|
764 bool retval = false; |
|
|
765 |
|
3523
|
766 std::string path = fcn_file_in_path (nm); |
|
3355
|
767 |
|
3523
|
768 std::string h = get_help_from_file (path); |
|
3355
|
769 |
|
|
770 if (! h.empty ()) |
|
|
771 { |
|
|
772 os << nm << " is the file: " << path << "\n\n"; |
|
|
773 display_help_text (os, h); |
|
|
774 os << "\n"; |
|
|
775 retval = true; |
|
|
776 } |
|
|
777 |
|
|
778 return retval; |
|
|
779 } |
|
|
780 |
|
1140
|
781 static void |
|
1755
|
782 builtin_help (int argc, const string_vector& argv) |
|
1140
|
783 { |
|
|
784 help_list *op_help_list = operator_help (); |
|
|
785 help_list *kw_help_list = keyword_help (); |
|
|
786 |
|
1755
|
787 for (int i = 1; i < argc; i++) |
|
1140
|
788 { |
|
2095
|
789 if (help_from_list (octave_stdout, op_help_list, argv[i], 0)) |
|
1140
|
790 continue; |
|
|
791 |
|
2095
|
792 if (help_from_list (octave_stdout, kw_help_list, argv[i], 0)) |
|
1140
|
793 continue; |
|
|
794 |
|
3355
|
795 if (help_from_symbol_table (octave_stdout, argv[i])) |
|
|
796 continue; |
|
1755
|
797 |
|
3355
|
798 if (help_from_file (octave_stdout, argv[i])) |
|
|
799 continue; |
|
1140
|
800 |
|
2095
|
801 octave_stdout << "\nhelp: sorry, `" << argv[i] |
|
|
802 << "' is not documented\n"; |
|
1140
|
803 } |
|
|
804 |
|
2095
|
805 additional_help_message (octave_stdout); |
|
1140
|
806 } |
|
|
807 |
|
4208
|
808 DEFCMD (help, args, , |
|
3332
|
809 "-*- texinfo -*-\n\ |
|
|
810 @deffn {Command} help\n\ |
|
|
811 Octave's @code{help} command can be used to print brief usage-style\n\ |
|
|
812 messages, or to display information directly from an on-line version of\n\ |
|
|
813 the printed manual, using the GNU Info browser. If invoked without any\n\ |
|
|
814 arguments, @code{help} prints a list of all the available operators,\n\ |
|
|
815 functions, and built-in variables. If the first argument is @code{-i},\n\ |
|
|
816 the @code{help} command searches the index of the on-line version of\n\ |
|
|
817 this manual for the given topics.\n\ |
|
3168
|
818 \n\ |
|
3332
|
819 For example, the command @kbd{help help} prints a short message\n\ |
|
|
820 describing the @code{help} command, and @kbd{help -i help} starts the\n\ |
|
|
821 GNU Info browser at this node in the on-line version of the manual.\n\ |
|
|
822 \n\ |
|
|
823 Once the GNU Info browser is running, help for using it is available\n\ |
|
|
824 using the command @kbd{C-h}.\n\ |
|
3333
|
825 @end deffn") |
|
529
|
826 { |
|
2086
|
827 octave_value_list retval; |
|
529
|
828 |
|
1755
|
829 int argc = args.length () + 1; |
|
|
830 |
|
1968
|
831 string_vector argv = args.make_argv ("help"); |
|
1755
|
832 |
|
|
833 if (error_state) |
|
|
834 return retval; |
|
529
|
835 |
|
|
836 if (argc == 1) |
|
3014
|
837 simple_help (); |
|
529
|
838 else |
|
|
839 { |
|
1755
|
840 if (argv[1] == "-i") |
|
3014
|
841 help_from_info (argv, 2, argc); |
|
529
|
842 else |
|
3014
|
843 builtin_help (argc, argv); |
|
529
|
844 } |
|
|
845 |
|
|
846 return retval; |
|
|
847 } |
|
|
848 |
|
3355
|
849 static void |
|
3523
|
850 do_type (std::ostream& os, const std::string& name, bool pr_type_info, |
|
3355
|
851 bool quiet, bool pr_orig_txt) |
|
|
852 { |
|
|
853 symbol_record *sym_rec = lookup_by_name (name, 0); |
|
|
854 |
|
|
855 if (sym_rec && sym_rec->is_defined ()) |
|
3356
|
856 sym_rec->type (os, pr_type_info, quiet, pr_orig_txt); |
|
3355
|
857 else |
|
|
858 { |
|
3523
|
859 std::string ff = fcn_file_in_path (name); |
|
3355
|
860 |
|
|
861 if (! ff.empty ()) |
|
|
862 { |
|
3538
|
863 std::ifstream fs (ff.c_str (), std::ios::in); |
|
3355
|
864 |
|
|
865 if (fs) |
|
|
866 { |
|
|
867 if (pr_type_info && ! quiet) |
|
|
868 os << name << " is the script file: " << ff << "\n\n"; |
|
|
869 |
|
|
870 char ch; |
|
|
871 |
|
|
872 while (fs.get (ch)) |
|
|
873 os << ch; |
|
|
874 } |
|
|
875 else |
|
|
876 os << "unable to open `" << ff << "' for reading!\n"; |
|
|
877 } |
|
|
878 else |
|
|
879 error ("type: `%s' undefined", name.c_str ()); |
|
|
880 } |
|
|
881 } |
|
|
882 |
|
4208
|
883 DEFCMD (type, args, nargout, |
|
3361
|
884 "-*- texinfo -*-\n\ |
|
|
885 \n\ |
|
|
886 @deffn {Command} type options name @dots{}\n\ |
|
|
887 Display the definition of each @var{name} that refers to a function.\n\ |
|
|
888 \n\ |
|
|
889 Normally also displays if each @var{name} is user-defined or builtin;\n\ |
|
|
890 the @code{-q} option suppresses this behaviour.\n\ |
|
581
|
891 \n\ |
|
3361
|
892 Currently, Octave can only display functions that can be compiled\n\ |
|
|
893 cleanly, because it uses its internal representation of the function to\n\ |
|
|
894 recreate the program text.\n\ |
|
|
895 \n\ |
|
|
896 Comments are not displayed because Octave's parser currently discards\n\ |
|
|
897 them as it converts the text of a function file to its internal\n\ |
|
|
898 representation. This problem may be fixed in a future release.\n\ |
|
|
899 @end deffn") |
|
581
|
900 { |
|
3584
|
901 octave_value retval; |
|
1588
|
902 |
|
1755
|
903 int argc = args.length () + 1; |
|
|
904 |
|
1968
|
905 string_vector argv = args.make_argv ("type"); |
|
1755
|
906 |
|
3355
|
907 if (! error_state) |
|
581
|
908 { |
|
3355
|
909 if (argc > 1) |
|
|
910 { |
|
|
911 // XXX FIXME XXX -- we should really use getopt () |
|
2532
|
912 |
|
3355
|
913 bool quiet = false; |
|
|
914 bool pr_orig_txt = true; |
|
2532
|
915 |
|
3355
|
916 int idx; |
|
581
|
917 |
|
3355
|
918 for (idx = 1; idx < argc; idx++) |
|
1281
|
919 { |
|
3355
|
920 if (argv[idx] == "-q" || argv[idx] == "-quiet") |
|
|
921 quiet = true; |
|
|
922 else if (argv[idx] == "-t" || argv[idx] == "-transformed") |
|
|
923 pr_orig_txt = false; |
|
|
924 else |
|
|
925 break; |
|
1281
|
926 } |
|
|
927 |
|
3355
|
928 if (idx < argc) |
|
|
929 { |
|
4051
|
930 OSSTREAM output_buf; |
|
581
|
931 |
|
3355
|
932 for (int i = idx; i < argc; i++) |
|
581
|
933 { |
|
3523
|
934 std::string id = argv[i]; |
|
2534
|
935 |
|
3355
|
936 if (nargout == 0) |
|
|
937 do_type (octave_stdout, id, true, quiet, pr_orig_txt); |
|
|
938 else |
|
|
939 do_type (output_buf, id, false, quiet, pr_orig_txt); |
|
581
|
940 |
|
3355
|
941 if (error_state) |
|
|
942 goto abort; |
|
581
|
943 } |
|
|
944 |
|
3584
|
945 if (nargout != 0) |
|
625
|
946 { |
|
4051
|
947 output_buf << OSSTREAM_ENDS; |
|
3164
|
948 |
|
4051
|
949 retval = OSSTREAM_STR (output_buf); |
|
3164
|
950 |
|
4051
|
951 OSSTREAM_FREEZE (output_buf); |
|
625
|
952 } |
|
581
|
953 } |
|
|
954 else |
|
3355
|
955 print_usage ("type"); |
|
|
956 } |
|
|
957 else |
|
|
958 print_usage ("type"); |
|
|
959 } |
|
3141
|
960 |
|
3355
|
961 abort: |
|
581
|
962 |
|
|
963 return retval; |
|
|
964 } |
|
|
965 |
|
3536
|
966 static std::string |
|
3523
|
967 do_which (const std::string& name) |
|
3355
|
968 { |
|
3523
|
969 std::string retval; |
|
3355
|
970 |
|
|
971 symbol_record *sym_rec = lookup_by_name (name, 0); |
|
|
972 |
|
|
973 if (sym_rec && sym_rec->is_defined ()) |
|
|
974 retval = sym_rec->which (); |
|
|
975 else |
|
|
976 { |
|
3523
|
977 std::string path = fcn_file_in_path (name); |
|
3355
|
978 |
|
|
979 if (! path.empty ()) |
|
|
980 retval = path; |
|
|
981 else |
|
|
982 retval = "undefined"; |
|
|
983 } |
|
|
984 |
|
|
985 return retval; |
|
|
986 } |
|
|
987 |
|
|
988 static void |
|
3523
|
989 do_which (std::ostream& os, const std::string& name) |
|
3355
|
990 { |
|
|
991 symbol_record *sym_rec = lookup_by_name (name, 0); |
|
|
992 |
|
|
993 if (sym_rec && sym_rec->is_defined ()) |
|
|
994 sym_rec->which (os); |
|
|
995 else |
|
|
996 { |
|
3523
|
997 std::string path = fcn_file_in_path (name); |
|
3355
|
998 |
|
|
999 if (! path.empty ()) |
|
|
1000 os << "which: `" << name << "' is the script file\n" |
|
|
1001 << path << "\n"; |
|
|
1002 else |
|
|
1003 os << "which: `" << name << "' is undefined\n"; |
|
|
1004 } |
|
|
1005 } |
|
|
1006 |
|
4208
|
1007 DEFCMD (which, args, nargout, |
|
3361
|
1008 "-*- texinfo -*-\n\ |
|
|
1009 @deffn {Command} which name @dots{}\n\ |
|
|
1010 Display the type of each @var{name}. If @var{name} is defined from a\n\ |
|
|
1011 function file, the full name of the file is also displayed.\n\ |
|
|
1012 @end deffn") |
|
581
|
1013 { |
|
2086
|
1014 octave_value_list retval; |
|
581
|
1015 |
|
1968
|
1016 string_vector argv = args.make_argv ("which"); |
|
1755
|
1017 |
|
3355
|
1018 if (! error_state) |
|
|
1019 { |
|
|
1020 int argc = argv.length (); |
|
581
|
1021 |
|
|
1022 if (nargout > 0) |
|
|
1023 retval.resize (argc-1, Matrix ()); |
|
|
1024 |
|
3355
|
1025 if (argc > 1) |
|
581
|
1026 { |
|
3355
|
1027 for (int i = 1; i < argc; i++) |
|
581
|
1028 { |
|
3523
|
1029 std::string id = argv[i]; |
|
3141
|
1030 |
|
3355
|
1031 if (nargout == 0) |
|
|
1032 do_which (octave_stdout, id); |
|
581
|
1033 else |
|
3355
|
1034 retval(i-1) = do_which (id); |
|
581
|
1035 } |
|
|
1036 } |
|
3355
|
1037 else |
|
|
1038 print_usage (argv[0]); |
|
581
|
1039 } |
|
|
1040 |
|
|
1041 return retval; |
|
|
1042 } |
|
|
1043 |
|
2189
|
1044 static int |
|
2202
|
1045 info_file (void) |
|
|
1046 { |
|
|
1047 int status = 0; |
|
|
1048 |
|
3523
|
1049 std::string s = builtin_string_variable ("INFO_FILE"); |
|
2202
|
1050 |
|
|
1051 if (s.empty ()) |
|
|
1052 { |
|
|
1053 gripe_invalid_value_specified ("INFO_FILE"); |
|
|
1054 status = -1; |
|
|
1055 } |
|
|
1056 else |
|
|
1057 Vinfo_file = s; |
|
|
1058 |
|
|
1059 return status; |
|
|
1060 } |
|
|
1061 |
|
|
1062 static int |
|
|
1063 info_prog (void) |
|
|
1064 { |
|
|
1065 int status = 0; |
|
|
1066 |
|
3523
|
1067 std::string s = builtin_string_variable ("INFO_PROGRAM"); |
|
2202
|
1068 |
|
|
1069 if (s.empty ()) |
|
|
1070 { |
|
|
1071 gripe_invalid_value_specified ("INFO_PROGRAM"); |
|
|
1072 status = -1; |
|
|
1073 } |
|
|
1074 else |
|
|
1075 Vinfo_prog = s; |
|
|
1076 |
|
|
1077 return status; |
|
|
1078 } |
|
|
1079 |
|
3014
|
1080 static int |
|
3686
|
1081 makeinfo_prog (void) |
|
|
1082 { |
|
|
1083 int status = 0; |
|
|
1084 |
|
|
1085 std::string s = builtin_string_variable ("MAKEINFO_PROGRAM"); |
|
|
1086 |
|
|
1087 if (s.empty ()) |
|
|
1088 { |
|
|
1089 gripe_invalid_value_specified ("MAKEINFO_PROGRAM"); |
|
|
1090 status = -1; |
|
|
1091 } |
|
|
1092 else |
|
|
1093 Vmakeinfo_prog = s; |
|
|
1094 |
|
|
1095 return status; |
|
|
1096 } |
|
|
1097 |
|
|
1098 static int |
|
3014
|
1099 suppress_verbose_help_message (void) |
|
|
1100 { |
|
|
1101 Vsuppress_verbose_help_message |
|
|
1102 = check_preference ("suppress_verbose_help_message"); |
|
|
1103 |
|
|
1104 return 0; |
|
|
1105 } |
|
|
1106 |
|
2189
|
1107 void |
|
|
1108 symbols_of_help (void) |
|
|
1109 { |
|
3258
|
1110 DEFVAR (INFO_FILE, Vinfo_file, info_file, |
|
3332
|
1111 "-*- texinfo -*-\n\ |
|
|
1112 @defvr {Built-in Variable} INFO_FILE\n\ |
|
|
1113 The variable @code{INFO_FILE} names the location of the Octave info file.\n\ |
|
3686
|
1114 The default value is @code{\"@var{octave-home}/info/octave.info\"}, in\n\ |
|
|
1115 which @var{octave-home} is the directory where all of Octave is installed.\n\ |
|
3333
|
1116 @end defvr"); |
|
2202
|
1117 |
|
3258
|
1118 DEFVAR (INFO_PROGRAM, Vinfo_prog, info_prog, |
|
3332
|
1119 "-*- texinfo -*-\n\ |
|
3686
|
1120 @defvr {Built-in Variable} INFO_PROGRAM\n\ |
|
|
1121 The variable @code{INFO_PROGRAM} names the info program to run. Its\n\ |
|
|
1122 default initial value is\n\ |
|
|
1123 @code{\"@var{octave-home}/libexec/octave/@var{version}/exec/@var{arch}/info\"}\n\ |
|
|
1124 in which @var{octave-home} is the directory where all of Octave is\n\ |
|
|
1125 installed, @var{version} is the Octave version number, and @var{arch}\n\ |
|
|
1126 is the system type (for example, @code{i686-pc-linux-gnu}). The\n\ |
|
|
1127 default initial value may be overridden by the environment variable\n\ |
|
|
1128 @code{OCTAVE_INFO_PROGRAM}, or the command line argument\n\ |
|
|
1129 @code{--info-program NAME}, or by setting the value of\n\ |
|
|
1130 @code{INFO_PROGRAM} in a startup script\n\ |
|
|
1131 @end defvr"); |
|
|
1132 |
|
|
1133 DEFVAR (MAKEINFO_PROGRAM, Vmakeinfo_prog, makeinfo_prog, |
|
|
1134 "-*- texinfo -*-\n\ |
|
|
1135 @defvr {Built-in Variable} MAKEINFO_PROGRAM\n\ |
|
|
1136 The variable @code{MAKEINFO_PROGRAM} names the makeinfo program that\n\ |
|
|
1137 Octave runs to format help text that contains Texinfo markup commands.\n\ |
|
|
1138 Its default initial value is @code{\"makeinfo\"}.\n\ |
|
3333
|
1139 @end defvr"); |
|
2202
|
1140 |
|
4233
|
1141 DEFVAR (suppress_verbose_help_message, false, suppress_verbose_help_message, |
|
3332
|
1142 "-*- texinfo -*-\n\ |
|
|
1143 @defvr {Built-in Variable} suppress_verbose_help_message\n\ |
|
|
1144 If the value of @code{suppress_verbose_help_message} is nonzero, Octave\n\ |
|
|
1145 will not add additional help information to the end of the output from\n\ |
|
|
1146 the @code{help} command and usage messages for built-in commands.\n\ |
|
3333
|
1147 @end defvr"); |
|
2189
|
1148 } |
|
|
1149 |
|
1
|
1150 /* |
|
|
1151 ;;; Local Variables: *** |
|
|
1152 ;;; mode: C++ *** |
|
|
1153 ;;; End: *** |
|
|
1154 */ |
