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1 // octave-hist.cc -*- C++ -*- |
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2 /* |
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3 |
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296
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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 The functions listed below were adapted from similar functions from |
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23 GNU Bash, the Bourne Again SHell, copyright (C) 1987, 1989, 1991 Free |
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24 Software Foundation, Inc. |
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25 |
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26 do_history edit_history_readline |
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27 do_edit_history edit_history_add_hist |
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28 |
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29 */ |
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30 |
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240
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31 #ifdef HAVE_CONFIG_H |
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32 #include "config.h" |
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33 #endif |
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34 |
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35 #include <sys/types.h> |
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36 #ifdef HAVE_UNISTD_H |
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37 #include <unistd.h> |
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38 #endif |
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39 #include <fcntl.h> |
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40 #include <stdlib.h> |
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41 #include <stdio.h> |
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42 #include <string.h> |
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43 #include <signal.h> |
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44 #include <fstream.h> |
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45 #include <strstream.h> |
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46 |
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47 #include "statdefs.h" |
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48 #include "utils.h" |
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49 #include "error.h" |
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50 #include "input.h" |
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51 #include "octave.h" |
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529
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52 #include "oct-obj.h" |
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195
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53 #include "user-prefs.h" |
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54 #include "unwind-prot.h" |
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55 #include "octave-hist.h" |
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56 #include "sighandlers.h" |
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529
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57 #include "defun.h" |
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58 |
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59 extern "C" |
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60 { |
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61 #include <readline/history.h> |
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62 } |
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63 |
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168
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64 // Nonzero means input is coming from temporary history file. |
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65 int input_from_tmp_history_file = 0; |
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66 |
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67 // Nonzero means we are saving history lines. |
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68 int saving_history = 1; |
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69 |
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70 // The number of lines to save in the history file. |
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71 static int octave_hist_size = 1024; |
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72 |
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73 // The name of the history file. |
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74 static char *octave_hist_file; |
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75 |
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76 // The number of hisory lines we read from the history file. |
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77 static int history_lines_in_file = 0; |
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78 |
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79 // The number of history lines we've saved so far. |
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80 static int history_lines_this_session = 0; |
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81 |
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82 /* |
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83 * Get some default values, possibly reading them from the |
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84 * environment. |
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85 */ |
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86 static int |
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87 default_history_size (void) |
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88 { |
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89 int size = 1024; |
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90 char *env_size = getenv ("OCTAVE_HISTSIZE"); |
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529
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91 if (env_size) |
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92 { |
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93 int val; |
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94 if (sscanf (env_size, "%d", &val) == 1) |
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95 size = val > 0 ? val : 0; |
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96 } |
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97 return size; |
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98 } |
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99 |
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100 static char * |
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101 default_history_file (void) |
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102 { |
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529
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103 char *file = 0; |
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104 |
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105 char *env_file = getenv ("OCTAVE_HISTFILE"); |
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529
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106 if (env_file) |
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107 { |
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108 fstream f (env_file, (ios::in | ios::out)); |
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529
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109 if (f) |
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110 { |
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111 file = strsave (env_file); |
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112 f.close (); |
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113 } |
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114 } |
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115 |
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529
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116 if (! file && home_directory) |
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117 file = strconcat (home_directory, "/.octave_hist"); |
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118 |
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119 return file; |
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120 } |
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121 |
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122 /* |
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123 * Prime the history list. |
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124 */ |
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125 void |
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126 initialize_history (void) |
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127 { |
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128 octave_hist_file = default_history_file (); |
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129 octave_hist_size = default_history_size (); |
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130 |
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131 read_history (octave_hist_file); |
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132 using_history (); |
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133 history_lines_in_file = where_history (); |
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134 } |
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135 |
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136 void |
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137 clean_up_history (void) |
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138 { |
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139 stifle_history (octave_hist_size); |
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140 write_history (octave_hist_file); |
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141 } |
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142 |
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143 void |
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144 maybe_save_history (char *s) |
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145 { |
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146 if (saving_history) |
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147 { |
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148 add_history (s); |
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149 history_lines_this_session++; |
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150 } |
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151 } |
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152 |
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153 /* |
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154 * Display, save, or load history. Stolen and modified from bash. |
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155 * |
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156 * Arg of -w FILENAME means write file, arg of -r FILENAME |
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157 * means read file, arg of -q means don't number lines. Arg of N |
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158 * means only display that many items. |
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159 */ |
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160 void |
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161 do_history (int argc, char **argv) |
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162 { |
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163 HIST_ENTRY **hlist; |
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164 |
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165 int numbered_output = 1; |
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166 |
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167 while (--argc > 0) |
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168 { |
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169 argv++; |
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170 |
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171 if (*argv[0] == '-' && strlen (*argv) == 2 |
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172 && ((*argv)[1] == 'r' || (*argv)[1] == 'w' |
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173 || (*argv)[1] == 'a' || (*argv)[1] == 'n')) |
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174 { |
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175 char *file; |
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176 int result = 0; |
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177 |
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178 if (argc > 1) |
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179 file = *(argv+1); |
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180 else |
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181 file = octave_hist_file; |
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182 |
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183 switch ((*argv)[1]) |
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184 { |
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185 case 'a': // Append `new' lines to file. |
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186 { |
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187 if (history_lines_this_session) |
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188 { |
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189 if (history_lines_this_session < where_history ()) |
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190 { |
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191 // If the filename was supplied, then create it if it doesn't already |
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192 // exist. |
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193 if (file) |
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194 { |
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195 struct stat buf; |
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196 |
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197 if (stat (file, &buf) == -1) |
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198 { |
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199 int tem; |
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200 |
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201 tem = open (file, O_CREAT, 0666); |
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202 close (tem); |
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203 } |
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204 } |
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205 |
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206 result = |
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207 append_history (history_lines_this_session, file); |
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208 history_lines_in_file += history_lines_this_session; |
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209 history_lines_this_session = 0; |
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210 } |
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211 } |
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212 } |
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213 break; |
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214 case 'w': // Write entire history. |
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215 result = write_history (file); |
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216 break; |
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217 case 'r': // Read entire file. |
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218 result = read_history (file); |
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219 break; |
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220 case 'n': // Read `new' history from file. |
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221 // Read all of the lines in the file that we haven't already read. |
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222 using_history (); |
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223 result = read_history_range (file, history_lines_in_file, -1); |
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224 using_history (); |
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225 history_lines_in_file = where_history (); |
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226 break; |
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227 } |
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228 return; |
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229 } |
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230 else if (strcmp (*argv, "-q") == 0) |
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231 numbered_output = 0; |
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232 else if (strcmp (*argv, "--") == 0) |
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233 { |
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234 argc--; |
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235 argv++; |
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236 break; |
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237 } |
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238 else |
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239 break; |
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240 } |
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241 |
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242 int limited = 0; |
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243 int limit = 0; |
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244 |
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245 if (argc > 0) |
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246 { |
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247 limited = 1; |
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248 if (sscanf (*argv, "%d", &limit) != 1) |
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249 { |
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250 if (*argv[0] == '-') |
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251 error ("history: unrecognized option `%s'", *argv); |
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252 else |
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217
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253 error ("history: bad non-numeric arg `%s'", *argv); |
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254 return; |
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255 } |
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256 } |
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257 |
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258 hlist = history_list (); |
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259 |
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260 if (hlist) |
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261 { |
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529
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262 for (int i = 0; hlist[i]; i++) |
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263 ; // Do nothing. |
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264 |
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265 if (limit < 0) |
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266 limit = -limit; |
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267 |
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268 if (!limited) |
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269 i = 0; |
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270 else |
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271 if ((i -= limit) < 0) |
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272 i = 0; |
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273 |
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274 while (hlist[i]) |
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275 { |
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276 // QUIT; // in bash: (interrupt_state) throw_to_top_level (); |
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277 |
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278 if (numbered_output) |
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279 cerr.form ("%5d%c", i + history_base, hlist[i]->data ? '*' : ' '); |
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280 cerr << hlist[i]->line << "\n"; |
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281 i++; |
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282 } |
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283 } |
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284 } |
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285 |
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286 /* |
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287 * Read the edited history lines from STREAM and return them |
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288 * one at a time. This can read unlimited length lines. The |
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289 * caller should free the storage. |
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290 */ |
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291 static char * |
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292 edit_history_readline (fstream& stream) |
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293 { |
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294 char c; |
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295 int line_len = 128; |
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296 int lindex = 0; |
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297 char *line = new char [line_len]; |
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298 line[0] = '\0'; |
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299 |
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300 while (stream.get (c)) |
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301 { |
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302 if (lindex + 2 >= line_len) |
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303 { |
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304 char *tmp_line = new char [line_len += 128]; |
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305 strcpy (tmp_line, line); |
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306 delete [] line; |
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307 line = tmp_line; |
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308 } |
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309 |
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310 if (c == '\n') |
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311 { |
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312 line[lindex++] = '\n'; |
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313 line[lindex++] = '\0'; |
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314 return line; |
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315 } |
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316 else |
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317 line[lindex++] = c; |
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318 } |
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319 |
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320 if (! lindex) |
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321 { |
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322 delete [] line; |
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323 return 0; |
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324 } |
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325 |
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326 if (lindex + 2 >= line_len) |
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327 { |
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328 char *tmp_line = new char [lindex+3]; |
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329 strcpy (tmp_line, line); |
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330 delete [] line; |
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331 line = tmp_line; |
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332 } |
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333 |
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334 // Finish with newline if none in file. |
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335 |
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336 line[lindex++] = '\n'; |
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337 line[lindex++] = '\0'; |
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338 return line; |
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339 } |
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340 |
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64
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341 extern "C" |
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342 { |
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343 HIST_ENTRY *history_get (); |
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344 } |
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345 |
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346 /* |
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347 * Use `command' to replace the last entry in the history list, which, |
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348 * by this time, is `run_history blah...'. The intent is that the |
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349 * new command become the history entry, and that `fc' should never |
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350 * appear in the history list. This way you can do `run_history' to |
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351 * your heart's content. |
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352 */ |
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353 static void |
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354 edit_history_repl_hist (char *command) |
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355 { |
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529
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356 if (! command || ! *command) |
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357 return; |
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358 |
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359 HIST_ENTRY **hlist = history_list (); |
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360 |
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529
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361 if (! hlist) |
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64
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362 return; |
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363 |
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364 for (int i = 0; hlist[i]; i++) |
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365 ; // Count 'em. |
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366 i--; |
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367 |
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368 /* History_get () takes a parameter that should be |
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369 offset by history_base. */ |
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370 |
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371 // Don't free this. |
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372 HIST_ENTRY *histent = history_get (history_base + i); |
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529
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373 if (! histent) |
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64
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374 return; |
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375 |
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529
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376 char *data = 0; |
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377 if (histent->data) |
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64
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378 { |
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379 int len = strlen (histent->data); |
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380 data = (char *) malloc (len); |
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381 strcpy (data, histent->data); |
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382 } |
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383 |
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384 int n = strlen (command); |
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385 |
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386 if (command[n - 1] == '\n') |
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387 command[n - 1] = '\0'; |
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388 |
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529
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389 if (command && *command) |
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64
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390 { |
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391 HIST_ENTRY *discard = replace_history_entry (i, command, data); |
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529
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392 if (discard) |
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64
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393 { |
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529
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394 if (discard->line) |
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64
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395 free (discard->line); |
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396 |
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397 free ((char *) discard); |
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398 } |
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399 } |
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400 } |
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401 |
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402 static void |
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403 edit_history_add_hist (char *line) |
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404 { |
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529
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405 if (line) |
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1
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406 { |
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407 int len = strlen (line); |
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408 if (len > 0 && line[len-1] == '\n') |
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409 line[len-1] = '\0'; |
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410 |
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411 if (line[0] != '\0') |
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412 add_history (line); |
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413 } |
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414 } |
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415 |
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416 #define histline(i) (hlist[(i)]->line) |
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417 |
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64
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418 static char * |
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419 mk_tmp_hist_file (int argc, char **argv, int insert_curr, char *warn_for) |
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1
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420 { |
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421 HIST_ENTRY **hlist; |
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422 |
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423 hlist = history_list (); |
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424 |
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425 int hist_count = 0; |
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426 |
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529
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427 while (hlist[hist_count++]) |
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428 ; // Find the number of items in the history list. |
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429 |
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430 // The current command line is already part of the history list by the |
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431 // time we get to this point. Delete it from the list. |
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432 |
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433 hist_count -= 2; |
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64
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434 if (! insert_curr) |
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435 remove_history (hist_count); |
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1
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436 hist_count--; |
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437 |
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438 // If no numbers have been specified, the default is to edit the last |
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439 // command in the history list. |
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440 |
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441 int hist_end = hist_count; |
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442 int hist_beg = hist_count; |
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443 int reverse = 0; |
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444 |
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445 // Process options |
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446 |
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447 int usage_error = 0; |
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448 if (argc == 3) |
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449 { |
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450 argv++; |
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451 if (sscanf (*argv++, "%d", &hist_beg) != 1 |
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452 || sscanf (*argv, "%d", &hist_end) != 1) |
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453 usage_error = 1; |
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454 else |
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455 { |
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456 hist_beg--; |
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457 hist_end--; |
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458 } |
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459 } |
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460 else if (argc == 2) |
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461 { |
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462 argv++; |
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463 if (sscanf (*argv++, "%d", &hist_beg) != 1) |
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464 usage_error = 1; |
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465 else |
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466 { |
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467 hist_beg--; |
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468 hist_end = hist_beg; |
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469 } |
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470 } |
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471 |
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472 if (hist_beg < 0 || hist_end < 0 || hist_beg > hist_count |
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473 || hist_end > hist_count) |
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474 { |
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64
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475 error ("%s: history specification out of range", warn_for); |
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529
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476 return 0; |
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1
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477 } |
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478 |
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479 if (usage_error) |
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480 { |
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64
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481 usage ("%s [first] [last]", warn_for); |
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529
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482 return 0; |
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1
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483 } |
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484 |
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485 if (hist_end < hist_beg) |
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486 { |
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487 int t = hist_end; |
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488 hist_end = hist_beg; |
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489 hist_beg = t; |
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490 reverse = 1; |
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491 } |
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492 |
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529
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493 char *name = tmpnam (0); |
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1
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494 |
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495 fstream file (name, ios::out); |
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64
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496 |
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1
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497 if (! file) |
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498 { |
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64
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499 error ("%s: couldn't open temporary file `%s'", warn_for, name); |
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529
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500 return 0; |
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1
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501 } |
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502 |
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503 if (reverse) |
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504 { |
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505 for (int i = hist_end; i >= hist_beg; i--) |
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506 file << histline (i) << "\n"; |
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507 } |
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508 else |
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509 { |
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510 for (int i = hist_beg; i <= hist_end; i++) |
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511 file << histline (i) << "\n"; |
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512 } |
|
|
513 |
|
|
514 file.close (); |
|
|
515 |
|
168
|
516 return strsave (name); |
|
64
|
517 } |
|
|
518 |
|
|
519 void |
|
|
520 do_edit_history (int argc, char **argv) |
|
|
521 { |
|
|
522 char *name = mk_tmp_hist_file (argc, argv, 0, "edit_history"); |
|
|
523 |
|
529
|
524 if (! name) |
|
64
|
525 return; |
|
|
526 |
|
1
|
527 // Call up our favorite editor on the file of commands. |
|
|
528 |
|
|
529 ostrstream buf; |
|
195
|
530 buf << user_pref.editor << " " << name << ends; |
|
1
|
531 char *cmd = buf.str (); |
|
|
532 |
|
|
533 // Ignore interrupts while we are off editing commands. Should we |
|
64
|
534 // maybe avoid using system()? |
|
1
|
535 |
|
|
536 volatile sig_handler *saved_sigint_handler = signal (SIGINT, SIG_IGN); |
|
|
537 system (cmd); |
|
|
538 signal (SIGINT, saved_sigint_handler); |
|
|
539 |
|
|
540 // Write the commands to the history file since parse_and_execute |
|
|
541 // disables command line history while it executes. |
|
|
542 |
|
64
|
543 fstream file (name, ios::in); |
|
1
|
544 |
|
|
545 char *line; |
|
64
|
546 int first = 1; |
|
529
|
547 while ((line = edit_history_readline (file)) != 0) |
|
1
|
548 { |
|
|
549 |
|
|
550 // Skip blank lines |
|
|
551 |
|
|
552 if (line[0] == '\n') |
|
|
553 { |
|
|
554 delete [] line; |
|
|
555 continue; |
|
|
556 } |
|
|
557 |
|
64
|
558 if (first) |
|
|
559 { |
|
|
560 first = 0; |
|
|
561 edit_history_repl_hist (line); |
|
|
562 } |
|
|
563 else |
|
|
564 edit_history_add_hist (line); |
|
1
|
565 } |
|
|
566 |
|
|
567 file.close (); |
|
|
568 |
|
|
569 // Turn on command echo, so the output from this will make better sense. |
|
|
570 |
|
|
571 begin_unwind_frame ("do_edit_history"); |
|
|
572 unwind_protect_int (echo_input); |
|
168
|
573 unwind_protect_int (input_from_tmp_history_file); |
|
1
|
574 echo_input = 1; |
|
168
|
575 input_from_tmp_history_file = 1; |
|
1
|
576 |
|
|
577 parse_and_execute (name, 1); |
|
|
578 |
|
|
579 run_unwind_frame ("do_edit_history"); |
|
|
580 |
|
|
581 // Delete the temporary file. Should probably be done with an |
|
|
582 // unwind_protect. |
|
|
583 |
|
|
584 unlink (name); |
|
168
|
585 |
|
|
586 delete [] name; |
|
1
|
587 } |
|
|
588 |
|
64
|
589 void |
|
|
590 do_run_history (int argc, char **argv) |
|
|
591 { |
|
|
592 char *name = mk_tmp_hist_file (argc, argv, 1, "run_history"); |
|
|
593 |
|
529
|
594 if (! name) |
|
64
|
595 return; |
|
|
596 |
|
|
597 // Turn on command echo, so the output from this will make better sense. |
|
|
598 |
|
|
599 begin_unwind_frame ("do_run_history"); |
|
|
600 unwind_protect_int (echo_input); |
|
168
|
601 unwind_protect_int (input_from_tmp_history_file); |
|
64
|
602 echo_input = 1; |
|
168
|
603 input_from_tmp_history_file = 1; |
|
64
|
604 |
|
|
605 parse_and_execute (name, 1); |
|
|
606 |
|
|
607 run_unwind_frame ("do_run_history"); |
|
|
608 |
|
|
609 // Delete the temporary file. Should probably be done with an |
|
|
610 // unwind_protect. |
|
|
611 |
|
|
612 unlink (name); |
|
168
|
613 |
|
|
614 delete [] name; |
|
64
|
615 } |
|
|
616 |
|
1
|
617 int |
|
|
618 current_history_number (void) |
|
|
619 { |
|
|
620 using_history (); |
|
|
621 |
|
|
622 if (octave_hist_size > 0) |
|
|
623 return history_base + where_history (); |
|
|
624 else |
|
|
625 return -1; |
|
|
626 |
|
|
627 } |
|
|
628 |
|
529
|
629 DEFUN_TEXT ("edit_history", Fedit_history, Sedit_history, -1, 1, |
|
|
630 "edit_history [first] [last]\n\ |
|
|
631 \n\ |
|
|
632 edit commands from the history list") |
|
|
633 { |
|
|
634 Octave_object retval; |
|
|
635 |
|
|
636 DEFINE_ARGV("edit_history"); |
|
|
637 |
|
|
638 do_edit_history (argc, argv); |
|
|
639 |
|
|
640 DELETE_ARGV; |
|
|
641 |
|
|
642 return retval; |
|
|
643 } |
|
|
644 |
|
|
645 DEFUN_TEXT ("history", Fhistory, Shistory, -1, 1, |
|
|
646 "history [N] [-w file] [-r file] [-q]\n\ |
|
|
647 \n\ |
|
|
648 display, save, or load command history") |
|
|
649 { |
|
|
650 Octave_object retval; |
|
|
651 |
|
|
652 DEFINE_ARGV("history"); |
|
|
653 |
|
|
654 do_history (argc, argv); |
|
|
655 |
|
|
656 DELETE_ARGV; |
|
|
657 |
|
|
658 return retval; |
|
|
659 } |
|
|
660 |
|
|
661 DEFUN_TEXT ("run_history", Frun_history, Srun_history, -1, 1, |
|
|
662 "run_history [first] [last]\n\ |
|
|
663 \n\ |
|
|
664 run commands from the history list") |
|
|
665 { |
|
|
666 Octave_object retval; |
|
|
667 |
|
|
668 DEFINE_ARGV("run_history"); |
|
|
669 |
|
|
670 do_run_history (argc, argv); |
|
|
671 |
|
|
672 DELETE_ARGV; |
|
|
673 |
|
|
674 return retval; |
|
|
675 } |
|
|
676 |
|
1
|
677 /* |
|
|
678 ;;; Local Variables: *** |
|
|
679 ;;; mode: C++ *** |
|
|
680 ;;; page-delimiter: "^/\\*" *** |
|
|
681 ;;; End: *** |
|
|
682 */ |
