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1 // octave-hist.cc -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1992, 1993, 1994, 1995 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, write to the Free |
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20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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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1192
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32 #include <config.h> |
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33 #endif |
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34 |
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1346
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35 #include <csignal> |
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1343
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36 #include <cstdlib> |
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37 #include <cstring> |
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38 |
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1350
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39 #include <fstream.h> |
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40 #include <strstream.h> |
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41 |
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42 #ifdef HAVE_UNISTD_H |
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43 #include <sys/types.h> |
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44 #include <unistd.h> |
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45 #endif |
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46 |
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47 #include <fcntl.h> |
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48 |
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1465
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49 #include <readline/history.h> |
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1646
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50 #include <readline/tilde.h> |
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51 |
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1352
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52 #include "defun.h" |
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1
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53 #include "error.h" |
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54 #include "input.h" |
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1352
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55 #include "oct-obj.h" |
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56 #include "octave-hist.h" |
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1670
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57 #include "toplev.h" |
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1352
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58 #include "pager.h" |
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59 #include "sighandlers.h" |
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60 #include "statdefs.h" |
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61 #include "unwind-prot.h" |
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195
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62 #include "user-prefs.h" |
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1352
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63 #include "utils.h" |
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64 |
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168
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65 // Nonzero means input is coming from temporary history file. |
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66 int input_from_tmp_history_file = 0; |
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67 |
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1
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68 // The number of hisory lines we read from the history file. |
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69 static int history_lines_in_file = 0; |
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70 |
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71 // The number of history lines we've saved so far. |
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72 static int history_lines_this_session = 0; |
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73 |
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581
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74 // Get some default values, possibly reading them from the |
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75 // environment. |
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76 |
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1646
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77 int |
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78 default_history_size (void) |
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79 { |
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80 int size = 1024; |
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81 char *env_size = getenv ("OCTAVE_HISTSIZE"); |
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529
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82 if (env_size) |
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1
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83 { |
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84 int val; |
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85 if (sscanf (env_size, "%d", &val) == 1) |
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86 size = val > 0 ? val : 0; |
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87 } |
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88 return size; |
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89 } |
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90 |
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1646
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91 char * |
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92 default_history_file (void) |
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93 { |
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529
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94 char *file = 0; |
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95 |
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96 char *env_file = getenv ("OCTAVE_HISTFILE"); |
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529
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97 if (env_file) |
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98 { |
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99 fstream f (env_file, (ios::in | ios::out)); |
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529
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100 if (f) |
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1
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101 { |
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102 file = strsave (env_file); |
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103 f.close (); |
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104 } |
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105 } |
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106 |
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529
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107 if (! file && home_directory) |
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108 file = strconcat (home_directory, "/.octave_hist"); |
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109 |
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110 return file; |
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111 } |
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112 |
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581
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113 // Prime the history list. |
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114 |
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115 void |
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116 initialize_history (void) |
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117 { |
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1646
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118 static char *file = 0; |
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119 |
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120 if (file) |
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121 free (file); |
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122 |
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123 file = tilde_expand (user_pref.history_file); |
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124 |
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125 read_history (file); |
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126 |
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127 using_history (); |
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128 |
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129 history_lines_in_file = where_history (); |
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130 } |
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131 |
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132 void |
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133 clean_up_history (void) |
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134 { |
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1646
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135 static char *file = 0; |
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136 |
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137 if (file) |
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138 free (file); |
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139 |
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140 stifle_history (user_pref.history_size); |
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141 |
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142 file = tilde_expand (user_pref.history_file); |
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143 |
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144 if (user_pref.saving_history) |
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145 write_history (file); |
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1
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146 } |
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147 |
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148 void |
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149 maybe_save_history (const char *s) |
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150 { |
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151 if (user_pref.saving_history && ! input_from_startup_file) |
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152 { |
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153 add_history (s); |
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154 history_lines_this_session++; |
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155 } |
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156 } |
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157 |
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158 // Display, save, or load history. Stolen and modified from bash. |
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159 // |
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160 // Arg of -w FILENAME means write file, arg of -r FILENAME |
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161 // means read file, arg of -q means don't number lines. Arg of N |
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162 // means only display that many items. |
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163 |
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164 void |
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165 do_history (int argc, char **argv) |
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166 { |
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167 HIST_ENTRY **hlist; |
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168 |
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169 int numbered_output = 1; |
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170 |
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171 while (--argc > 0) |
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172 { |
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173 argv++; |
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174 |
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175 if (*argv[0] == '-' && strlen (*argv) == 2 |
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176 && ((*argv)[1] == 'r' || (*argv)[1] == 'w' |
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177 || (*argv)[1] == 'a' || (*argv)[1] == 'n')) |
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178 { |
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1646
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179 static char *file = 0; |
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1
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180 int result = 0; |
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181 |
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1646
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182 if (file) |
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183 free (file); |
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184 |
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185 if (argc > 1) |
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186 file = tilde_expand (*(argv+1)); |
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187 else |
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188 file = tilde_expand (user_pref.history_file); |
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189 |
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190 switch ((*argv)[1]) |
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191 { |
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192 case 'a': // Append `new' lines to file. |
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193 { |
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194 if (history_lines_this_session) |
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195 { |
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196 if (history_lines_this_session < where_history ()) |
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197 { |
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1358
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198 // If the filename was supplied, then create |
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199 // it if it doesn't already exist. |
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200 |
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1
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201 if (file) |
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202 { |
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203 struct stat buf; |
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204 |
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205 if (stat (file, &buf) == -1) |
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206 { |
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207 int tem; |
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208 |
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209 tem = open (file, O_CREAT, 0666); |
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210 close (tem); |
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211 } |
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212 } |
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213 |
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214 result = |
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215 append_history (history_lines_this_session, file); |
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216 history_lines_in_file += history_lines_this_session; |
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217 history_lines_this_session = 0; |
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218 } |
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219 } |
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220 } |
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221 break; |
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777
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222 |
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223 case 'w': // Write entire history. |
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224 result = write_history (file); |
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225 break; |
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777
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226 |
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227 case 'r': // Read entire file. |
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228 result = read_history (file); |
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229 break; |
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230 |
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231 case 'n': // Read `new' history from file. |
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232 |
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233 // Read all of the lines in the file that we haven't |
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234 // already read. |
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235 |
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236 using_history (); |
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237 result = read_history_range (file, history_lines_in_file, -1); |
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238 using_history (); |
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239 history_lines_in_file = where_history (); |
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240 break; |
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241 } |
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242 return; |
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243 } |
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244 else if (strcmp (*argv, "-q") == 0) |
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245 numbered_output = 0; |
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246 else if (strcmp (*argv, "--") == 0) |
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247 { |
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248 argc--; |
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249 argv++; |
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250 break; |
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251 } |
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252 else |
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253 break; |
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254 } |
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255 |
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256 int limited = 0; |
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257 int limit = 0; |
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258 |
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259 if (argc > 0) |
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260 { |
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261 limited = 1; |
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262 if (sscanf (*argv, "%d", &limit) != 1) |
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263 { |
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264 if (*argv[0] == '-') |
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217
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265 error ("history: unrecognized option `%s'", *argv); |
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266 else |
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217
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267 error ("history: bad non-numeric arg `%s'", *argv); |
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268 return; |
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269 } |
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270 } |
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271 |
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272 hlist = history_list (); |
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273 |
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274 if (hlist) |
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275 { |
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1321
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276 int i = 0; |
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277 |
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278 for (i = 0; hlist[i]; i++) |
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279 ; // Do nothing. |
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280 |
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281 if (limit < 0) |
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282 limit = -limit; |
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283 |
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284 if (!limited) |
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285 i = 0; |
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286 else |
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287 if ((i -= limit) < 0) |
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288 i = 0; |
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289 |
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581
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290 ostrstream output_buf; |
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291 |
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1
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292 while (hlist[i]) |
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293 { |
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294 // QUIT; // in bash: (interrupt_state) throw_to_top_level (); |
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295 |
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296 if (numbered_output) |
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581
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297 output_buf.form ("%5d%c", i + history_base, |
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298 hlist[i]->data ? '*' : ' '); |
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299 output_buf << hlist[i]->line << "\n"; |
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1
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300 i++; |
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301 } |
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581
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302 |
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303 output_buf << ends; |
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304 maybe_page_output (output_buf); |
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1
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305 } |
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306 } |
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307 |
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581
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308 // Read the edited history lines from STREAM and return them |
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309 // one at a time. This can read unlimited length lines. The |
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310 // caller should free the storage. |
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311 |
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312 static char * |
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313 edit_history_readline (fstream& stream) |
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314 { |
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315 char c; |
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316 int line_len = 128; |
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317 int lindex = 0; |
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318 char *line = new char [line_len]; |
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319 line[0] = '\0'; |
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320 |
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321 while (stream.get (c)) |
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322 { |
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323 if (lindex + 2 >= line_len) |
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324 { |
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325 char *tmp_line = new char [line_len += 128]; |
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326 strcpy (tmp_line, line); |
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327 delete [] line; |
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328 line = tmp_line; |
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329 } |
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330 |
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331 if (c == '\n') |
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332 { |
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333 line[lindex++] = '\n'; |
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334 line[lindex++] = '\0'; |
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335 return line; |
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336 } |
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337 else |
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338 line[lindex++] = c; |
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339 } |
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340 |
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341 if (! lindex) |
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342 { |
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343 delete [] line; |
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529
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344 return 0; |
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1
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345 } |
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346 |
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347 if (lindex + 2 >= line_len) |
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348 { |
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349 char *tmp_line = new char [lindex+3]; |
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350 strcpy (tmp_line, line); |
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351 delete [] line; |
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352 line = tmp_line; |
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353 } |
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354 |
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1358
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355 // Finish with newline if none in file. |
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1
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356 |
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357 line[lindex++] = '\n'; |
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358 line[lindex++] = '\0'; |
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359 return line; |
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360 } |
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361 |
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581
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362 // Use `command' to replace the last entry in the history list, which, |
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363 // by this time, is `run_history blah...'. The intent is that the |
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364 // new command become the history entry, and that `fc' should never |
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365 // appear in the history list. This way you can do `run_history' to |
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366 // your heart's content. |
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367 |
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64
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368 static void |
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369 edit_history_repl_hist (char *command) |
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370 { |
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529
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371 if (! command || ! *command) |
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64
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372 return; |
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373 |
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374 HIST_ENTRY **hlist = history_list (); |
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375 |
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529
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376 if (! hlist) |
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64
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377 return; |
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378 |
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1321
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379 int i = 0; |
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380 |
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381 for (i = 0; hlist[i]; i++) |
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64
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382 ; // Count 'em. |
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383 i--; |
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384 |
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1358
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385 // History_get () takes a parameter that should be offset by history_base. |
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64
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386 |
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1358
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387 // Don't free this. |
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64
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388 HIST_ENTRY *histent = history_get (history_base + i); |
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529
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389 if (! histent) |
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64
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390 return; |
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391 |
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529
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392 char *data = 0; |
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393 if (histent->data) |
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64
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394 { |
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395 int len = strlen (histent->data); |
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396 data = (char *) malloc (len); |
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397 strcpy (data, histent->data); |
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398 } |
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399 |
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400 int n = strlen (command); |
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401 |
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402 if (command[n - 1] == '\n') |
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403 command[n - 1] = '\0'; |
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404 |
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529
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405 if (command && *command) |
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64
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406 { |
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407 HIST_ENTRY *discard = replace_history_entry (i, command, data); |
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529
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408 if (discard) |
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64
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409 { |
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529
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410 if (discard->line) |
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64
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411 free (discard->line); |
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412 |
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413 free ((char *) discard); |
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414 } |
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415 } |
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416 } |
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417 |
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1
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418 static void |
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419 edit_history_add_hist (char *line) |
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420 { |
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529
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421 if (line) |
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1
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422 { |
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423 int len = strlen (line); |
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424 if (len > 0 && line[len-1] == '\n') |
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425 line[len-1] = '\0'; |
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426 |
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427 if (line[0] != '\0') |
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428 add_history (line); |
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429 } |
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430 } |
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431 |
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432 #define histline(i) (hlist[(i)]->line) |
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433 |
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64
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434 static char * |
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435 mk_tmp_hist_file (int argc, char **argv, int insert_curr, char *warn_for) |
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1
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436 { |
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437 HIST_ENTRY **hlist; |
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438 |
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439 hlist = history_list (); |
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440 |
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441 int hist_count = 0; |
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442 |
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529
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443 while (hlist[hist_count++]) |
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1
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444 ; // Find the number of items in the history list. |
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445 |
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1358
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446 // The current command line is already part of the history list by |
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447 // the time we get to this point. Delete it from the list. |
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1
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448 |
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449 hist_count -= 2; |
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64
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450 if (! insert_curr) |
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451 remove_history (hist_count); |
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1
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452 hist_count--; |
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453 |
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1358
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454 // If no numbers have been specified, the default is to edit the |
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455 // last command in the history list. |
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1
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456 |
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457 int hist_end = hist_count; |
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458 int hist_beg = hist_count; |
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459 int reverse = 0; |
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460 |
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1358
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461 // Process options. |
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1
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462 |
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463 int usage_error = 0; |
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464 if (argc == 3) |
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465 { |
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466 argv++; |
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467 if (sscanf (*argv++, "%d", &hist_beg) != 1 |
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468 || sscanf (*argv, "%d", &hist_end) != 1) |
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469 usage_error = 1; |
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470 else |
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471 { |
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472 hist_beg--; |
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473 hist_end--; |
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474 } |
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475 } |
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476 else if (argc == 2) |
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477 { |
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478 argv++; |
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479 if (sscanf (*argv++, "%d", &hist_beg) != 1) |
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480 usage_error = 1; |
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481 else |
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482 { |
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483 hist_beg--; |
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484 hist_end = hist_beg; |
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485 } |
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486 } |
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487 |
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488 if (hist_beg < 0 || hist_end < 0 || hist_beg > hist_count |
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489 || hist_end > hist_count) |
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490 { |
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64
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491 error ("%s: history specification out of range", warn_for); |
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529
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492 return 0; |
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1
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493 } |
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494 |
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495 if (usage_error) |
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496 { |
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64
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497 usage ("%s [first] [last]", warn_for); |
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529
|
498 return 0; |
|
1
|
499 } |
|
|
500 |
|
|
501 if (hist_end < hist_beg) |
|
|
502 { |
|
|
503 int t = hist_end; |
|
|
504 hist_end = hist_beg; |
|
|
505 hist_beg = t; |
|
|
506 reverse = 1; |
|
|
507 } |
|
|
508 |
|
641
|
509 char *name = octave_tmp_file_name (); |
|
1
|
510 |
|
|
511 fstream file (name, ios::out); |
|
64
|
512 |
|
1
|
513 if (! file) |
|
|
514 { |
|
64
|
515 error ("%s: couldn't open temporary file `%s'", warn_for, name); |
|
529
|
516 return 0; |
|
1
|
517 } |
|
|
518 |
|
|
519 if (reverse) |
|
|
520 { |
|
|
521 for (int i = hist_end; i >= hist_beg; i--) |
|
|
522 file << histline (i) << "\n"; |
|
|
523 } |
|
|
524 else |
|
|
525 { |
|
|
526 for (int i = hist_beg; i <= hist_end; i++) |
|
|
527 file << histline (i) << "\n"; |
|
|
528 } |
|
|
529 |
|
|
530 file.close (); |
|
|
531 |
|
168
|
532 return strsave (name); |
|
64
|
533 } |
|
|
534 |
|
|
535 void |
|
|
536 do_edit_history (int argc, char **argv) |
|
|
537 { |
|
|
538 char *name = mk_tmp_hist_file (argc, argv, 0, "edit_history"); |
|
|
539 |
|
529
|
540 if (! name) |
|
64
|
541 return; |
|
|
542 |
|
1358
|
543 // Call up our favorite editor on the file of commands. |
|
1
|
544 |
|
|
545 ostrstream buf; |
|
195
|
546 buf << user_pref.editor << " " << name << ends; |
|
1
|
547 char *cmd = buf.str (); |
|
|
548 |
|
1358
|
549 // Ignore interrupts while we are off editing commands. Should we |
|
|
550 // maybe avoid using system()? |
|
1
|
551 |
|
1443
|
552 volatile sig_handler *saved_sigint_handler |
|
|
553 = octave_set_signal_handler (SIGINT, SIG_IGN); |
|
|
554 |
|
1
|
555 system (cmd); |
|
1443
|
556 |
|
|
557 octave_set_signal_handler (SIGINT, saved_sigint_handler); |
|
1
|
558 |
|
1358
|
559 // Write the commands to the history file since parse_and_execute |
|
|
560 // disables command line history while it executes. |
|
1
|
561 |
|
64
|
562 fstream file (name, ios::in); |
|
1
|
563 |
|
|
564 char *line; |
|
64
|
565 int first = 1; |
|
529
|
566 while ((line = edit_history_readline (file)) != 0) |
|
1
|
567 { |
|
1358
|
568 // Skip blank lines. |
|
1
|
569 |
|
|
570 if (line[0] == '\n') |
|
|
571 { |
|
|
572 delete [] line; |
|
|
573 continue; |
|
|
574 } |
|
|
575 |
|
64
|
576 if (first) |
|
|
577 { |
|
|
578 first = 0; |
|
|
579 edit_history_repl_hist (line); |
|
|
580 } |
|
|
581 else |
|
|
582 edit_history_add_hist (line); |
|
1
|
583 } |
|
|
584 |
|
|
585 file.close (); |
|
|
586 |
|
1358
|
587 // Turn on command echo, so the output from this will make better |
|
|
588 // sense. |
|
1
|
589 |
|
|
590 begin_unwind_frame ("do_edit_history"); |
|
1588
|
591 unwind_protect_int (user_pref.echo_executing_commands); |
|
168
|
592 unwind_protect_int (input_from_tmp_history_file); |
|
1588
|
593 user_pref.echo_executing_commands = ECHO_CMD_LINE; |
|
168
|
594 input_from_tmp_history_file = 1; |
|
1
|
595 |
|
|
596 parse_and_execute (name, 1); |
|
|
597 |
|
|
598 run_unwind_frame ("do_edit_history"); |
|
|
599 |
|
1358
|
600 // Delete the temporary file. Should probably be done with an |
|
|
601 // unwind_protect. |
|
1
|
602 |
|
|
603 unlink (name); |
|
168
|
604 |
|
|
605 delete [] name; |
|
1
|
606 } |
|
|
607 |
|
64
|
608 void |
|
|
609 do_run_history (int argc, char **argv) |
|
|
610 { |
|
|
611 char *name = mk_tmp_hist_file (argc, argv, 1, "run_history"); |
|
|
612 |
|
529
|
613 if (! name) |
|
64
|
614 return; |
|
|
615 |
|
1358
|
616 // Turn on command echo, so the output from this will make better |
|
|
617 // sense. |
|
64
|
618 |
|
|
619 begin_unwind_frame ("do_run_history"); |
|
1588
|
620 unwind_protect_int (user_pref.echo_executing_commands); |
|
168
|
621 unwind_protect_int (input_from_tmp_history_file); |
|
1588
|
622 user_pref.echo_executing_commands = ECHO_CMD_LINE; |
|
168
|
623 input_from_tmp_history_file = 1; |
|
64
|
624 |
|
|
625 parse_and_execute (name, 1); |
|
|
626 |
|
|
627 run_unwind_frame ("do_run_history"); |
|
|
628 |
|
1358
|
629 // Delete the temporary file. Should probably be done with an |
|
|
630 // unwind_protect. |
|
64
|
631 |
|
|
632 unlink (name); |
|
168
|
633 |
|
|
634 delete [] name; |
|
64
|
635 } |
|
|
636 |
|
1
|
637 int |
|
|
638 current_history_number (void) |
|
|
639 { |
|
|
640 using_history (); |
|
|
641 |
|
1646
|
642 if (user_pref.history_size > 0) |
|
1
|
643 return history_base + where_history (); |
|
|
644 else |
|
|
645 return -1; |
|
|
646 |
|
|
647 } |
|
|
648 |
|
1488
|
649 DEFUN_TEXT ("edit_history", Fedit_history, Sedit_history, 10, |
|
529
|
650 "edit_history [first] [last]\n\ |
|
|
651 \n\ |
|
|
652 edit commands from the history list") |
|
|
653 { |
|
|
654 Octave_object retval; |
|
|
655 |
|
|
656 DEFINE_ARGV("edit_history"); |
|
|
657 |
|
|
658 do_edit_history (argc, argv); |
|
|
659 |
|
|
660 DELETE_ARGV; |
|
|
661 |
|
|
662 return retval; |
|
|
663 } |
|
|
664 |
|
1488
|
665 DEFUN_TEXT ("history", Fhistory, Shistory, 10, |
|
529
|
666 "history [N] [-w file] [-r file] [-q]\n\ |
|
|
667 \n\ |
|
|
668 display, save, or load command history") |
|
|
669 { |
|
|
670 Octave_object retval; |
|
|
671 |
|
|
672 DEFINE_ARGV("history"); |
|
|
673 |
|
|
674 do_history (argc, argv); |
|
|
675 |
|
|
676 DELETE_ARGV; |
|
|
677 |
|
|
678 return retval; |
|
|
679 } |
|
|
680 |
|
1488
|
681 DEFUN_TEXT ("run_history", Frun_history, Srun_history, 10, |
|
529
|
682 "run_history [first] [last]\n\ |
|
|
683 \n\ |
|
|
684 run commands from the history list") |
|
|
685 { |
|
|
686 Octave_object retval; |
|
|
687 |
|
|
688 DEFINE_ARGV("run_history"); |
|
|
689 |
|
|
690 do_run_history (argc, argv); |
|
|
691 |
|
|
692 DELETE_ARGV; |
|
|
693 |
|
|
694 return retval; |
|
|
695 } |
|
|
696 |
|
1
|
697 /* |
|
|
698 ;;; Local Variables: *** |
|
|
699 ;;; mode: C++ *** |
|
|
700 ;;; page-delimiter: "^/\\*" *** |
|
|
701 ;;; End: *** |
|
|
702 */ |
